diff options
Diffstat (limited to 'Utilities/cmcurl/lib/vtls/sectransp.c')
| -rw-r--r-- | Utilities/cmcurl/lib/vtls/sectransp.c | 3510 |
1 files changed, 3510 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/vtls/sectransp.c b/Utilities/cmcurl/lib/vtls/sectransp.c new file mode 100644 index 0000000000..f7a20b20b1 --- /dev/null +++ b/Utilities/cmcurl/lib/vtls/sectransp.c @@ -0,0 +1,3510 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 2012 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al. + * Copyright (C) 2012 - 2017, Nick Zitzmann, <nickzman@gmail.com>. + * + * This software is licensed as described in the file COPYING, which + * you should have received as part of this distribution. The terms + * are also available at https://curl.se/docs/copyright.html. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the COPYING file. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ***************************************************************************/ + +/* + * Source file for all iOS and macOS SecureTransport-specific code for the + * TLS/SSL layer. No code but vtls.c should ever call or use these functions. + */ + +#include "curl_setup.h" + +#include "urldata.h" /* for the Curl_easy definition */ +#include "curl_base64.h" +#include "strtok.h" +#include "multiif.h" +#include "strcase.h" +#include "x509asn1.h" +#include "strerror.h" + +#ifdef USE_SECTRANSP + +#ifdef __clang__ +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wtautological-pointer-compare" +#endif /* __clang__ */ + +#include <limits.h> + +#include <Security/Security.h> +/* For some reason, when building for iOS, the omnibus header above does + * not include SecureTransport.h as of iOS SDK 5.1. */ +#include <Security/SecureTransport.h> +#include <CoreFoundation/CoreFoundation.h> +#include <CommonCrypto/CommonDigest.h> + +/* The Security framework has changed greatly between iOS and different macOS + versions, and we will try to support as many of them as we can (back to + Leopard and iOS 5) by using macros and weak-linking. + + In general, you want to build this using the most recent OS SDK, since some + features require curl to be built against the latest SDK. TLS 1.1 and 1.2 + support, for instance, require the macOS 10.8 SDK or later. TLS 1.3 + requires the macOS 10.13 or iOS 11 SDK or later. */ +#if (TARGET_OS_MAC && !(TARGET_OS_EMBEDDED || TARGET_OS_IPHONE)) + +#if MAC_OS_X_VERSION_MAX_ALLOWED < 1050 +#error "The Secure Transport back-end requires Leopard or later." +#endif /* MAC_OS_X_VERSION_MAX_ALLOWED < 1050 */ + +#define CURL_BUILD_IOS 0 +#define CURL_BUILD_IOS_7 0 +#define CURL_BUILD_IOS_9 0 +#define CURL_BUILD_IOS_11 0 +#define CURL_BUILD_IOS_13 0 +#define CURL_BUILD_MAC 1 +/* This is the maximum API level we are allowed to use when building: */ +#define CURL_BUILD_MAC_10_5 MAC_OS_X_VERSION_MAX_ALLOWED >= 1050 +#define CURL_BUILD_MAC_10_6 MAC_OS_X_VERSION_MAX_ALLOWED >= 1060 +#define CURL_BUILD_MAC_10_7 MAC_OS_X_VERSION_MAX_ALLOWED >= 1070 +#define CURL_BUILD_MAC_10_8 MAC_OS_X_VERSION_MAX_ALLOWED >= 1080 +#define CURL_BUILD_MAC_10_9 MAC_OS_X_VERSION_MAX_ALLOWED >= 1090 +#define CURL_BUILD_MAC_10_11 MAC_OS_X_VERSION_MAX_ALLOWED >= 101100 +#define CURL_BUILD_MAC_10_13 MAC_OS_X_VERSION_MAX_ALLOWED >= 101300 +#define CURL_BUILD_MAC_10_15 MAC_OS_X_VERSION_MAX_ALLOWED >= 101500 +/* These macros mean "the following code is present to allow runtime backward + compatibility with at least this cat or earlier": + (You set this at build-time using the compiler command line option + "-mmacosx-version-min.") */ +#define CURL_SUPPORT_MAC_10_5 MAC_OS_X_VERSION_MIN_REQUIRED <= 1050 +#define CURL_SUPPORT_MAC_10_6 MAC_OS_X_VERSION_MIN_REQUIRED <= 1060 +#define CURL_SUPPORT_MAC_10_7 MAC_OS_X_VERSION_MIN_REQUIRED <= 1070 +#define CURL_SUPPORT_MAC_10_8 MAC_OS_X_VERSION_MIN_REQUIRED <= 1080 +#define CURL_SUPPORT_MAC_10_9 MAC_OS_X_VERSION_MIN_REQUIRED <= 1090 + +#elif TARGET_OS_EMBEDDED || TARGET_OS_IPHONE +#define CURL_BUILD_IOS 1 +#define CURL_BUILD_IOS_7 __IPHONE_OS_VERSION_MAX_ALLOWED >= 70000 +#define CURL_BUILD_IOS_9 __IPHONE_OS_VERSION_MAX_ALLOWED >= 90000 +#define CURL_BUILD_IOS_11 __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 +#define CURL_BUILD_IOS_13 __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000 +#define CURL_BUILD_MAC 0 +#define CURL_BUILD_MAC_10_5 0 +#define CURL_BUILD_MAC_10_6 0 +#define CURL_BUILD_MAC_10_7 0 +#define CURL_BUILD_MAC_10_8 0 +#define CURL_BUILD_MAC_10_9 0 +#define CURL_BUILD_MAC_10_11 0 +#define CURL_BUILD_MAC_10_13 0 +#define CURL_BUILD_MAC_10_15 0 +#define CURL_SUPPORT_MAC_10_5 0 +#define CURL_SUPPORT_MAC_10_6 0 +#define CURL_SUPPORT_MAC_10_7 0 +#define CURL_SUPPORT_MAC_10_8 0 +#define CURL_SUPPORT_MAC_10_9 0 + +#else +#error "The Secure Transport back-end requires iOS or macOS." +#endif /* (TARGET_OS_MAC && !(TARGET_OS_EMBEDDED || TARGET_OS_IPHONE)) */ + +#if CURL_BUILD_MAC +#include <sys/sysctl.h> +#endif /* CURL_BUILD_MAC */ + +#include "urldata.h" +#include "sendf.h" +#include "inet_pton.h" +#include "connect.h" +#include "select.h" +#include "vtls.h" +#include "sectransp.h" +#include "curl_printf.h" +#include "strdup.h" + +#include "curl_memory.h" +/* The last #include file should be: */ +#include "memdebug.h" + +/* From MacTypes.h (which we can't include because it isn't present in iOS: */ +#define ioErr -36 +#define paramErr -50 + +struct ssl_backend_data { + SSLContextRef ssl_ctx; + curl_socket_t ssl_sockfd; + bool ssl_direction; /* true if writing, false if reading */ + size_t ssl_write_buffered_length; +}; + +struct st_cipher { + const char *name; /* Cipher suite IANA name. It starts with "TLS_" prefix */ + const char *alias_name; /* Alias name is the same as OpenSSL cipher name */ + SSLCipherSuite num; /* Cipher suite code/number defined in IANA registry */ + bool weak; /* Flag to mark cipher as weak based on previous implementation + of Secure Transport back-end by CURL */ +}; + +/* Macro to initialize st_cipher data structure: stringify id to name, cipher + number/id, 'weak' suite flag + */ +#define CIPHER_DEF(num, alias, weak) \ + { #num, alias, num, weak } + +/* + Macro to initialize st_cipher data structure with name, code (IANA cipher + number/id value), and 'weak' suite flag. The first 28 cipher suite numbers + have the same IANA code for both SSL and TLS standards: numbers 0x0000 to + 0x001B. They have different names though. The first 4 letters of the cipher + suite name are the protocol name: "SSL_" or "TLS_", rest of the IANA name is + the same for both SSL and TLS cipher suite name. + The second part of the problem is that macOS/iOS SDKs don't define all TLS + codes but only 12 of them. The SDK defines all SSL codes though, i.e. SSL_NUM + constant is always defined for those 28 ciphers while TLS_NUM is defined only + for 12 of the first 28 ciphers. Those 12 TLS cipher codes match to + corresponding SSL enum value and represent the same cipher suite. Therefore + we'll use the SSL enum value for those cipher suites because it is defined + for all 28 of them. + We make internal data consistent and based on TLS names, i.e. all st_cipher + item names start with the "TLS_" prefix. + Summarizing all the above, those 28 first ciphers are presented in our table + with both TLS and SSL names. Their cipher numbers are assigned based on the + SDK enum value for the SSL cipher, which matches to IANA TLS number. + */ +#define CIPHER_DEF_SSLTLS(num_wo_prefix, alias, weak) \ + { "TLS_" #num_wo_prefix, alias, SSL_##num_wo_prefix, weak } + +/* + Cipher suites were marked as weak based on the following: + RC4 encryption - rfc7465, the document contains a list of deprecated ciphers. + Marked in the code below as weak. + RC2 encryption - many mentions, was found vulnerable to a relatively easy + attack https://link.springer.com/chapter/10.1007%2F3-540-69710-1_14 + Marked in the code below as weak. + DES and IDEA encryption - rfc5469, has a list of deprecated ciphers. + Marked in the code below as weak. + Anonymous Diffie-Hellman authentication and anonymous elliptic curve + Diffie-Hellman - vulnerable to a man-in-the-middle attack. Deprecated by + RFC 4346 aka TLS 1.1 (section A.5, page 60) + Null bulk encryption suites - not encrypted communication + Export ciphers, i.e. ciphers with restrictions to be used outside the US for + software exported to some countries, they were excluded from TLS 1.1 + version. More precisely, they were noted as ciphers which MUST NOT be + negotiated in RFC 4346 aka TLS 1.1 (section A.5, pages 60 and 61). + All of those filters were considered weak because they contain a weak + algorithm like DES, RC2 or RC4, and already considered weak by other + criteria. + 3DES - NIST deprecated it and is going to retire it by 2023 + https://csrc.nist.gov/News/2017/Update-to-Current-Use-and-Deprecation-of-TDEA + OpenSSL https://www.openssl.org/blog/blog/2016/08/24/sweet32/ also + deprecated those ciphers. Some other libraries also consider it + vulnerable or at least not strong enough. + + CBC ciphers are vulnerable with SSL3.0 and TLS1.0: + https://www.cisco.com/c/en/us/support/docs/security/email-security-appliance + /118518-technote-esa-00.html + We don't take care of this issue because it is resolved by later TLS + versions and for us, it requires more complicated checks, we need to + check a protocol version also. Vulnerability doesn't look very critical + and we do not filter out those cipher suites. + */ + +#define CIPHER_WEAK_NOT_ENCRYPTED TRUE +#define CIPHER_WEAK_RC_ENCRYPTION TRUE +#define CIPHER_WEAK_DES_ENCRYPTION TRUE +#define CIPHER_WEAK_IDEA_ENCRYPTION TRUE +#define CIPHER_WEAK_ANON_AUTH TRUE +#define CIPHER_WEAK_3DES_ENCRYPTION TRUE +#define CIPHER_STRONG_ENOUGH FALSE + +/* Please do not change the order of the first ciphers available for SSL. + Do not insert and do not delete any of them. Code below + depends on their order and continuity. + If you add a new cipher, please maintain order by number, i.e. + insert in between existing items to appropriate place based on + cipher suite IANA number +*/ +const static struct st_cipher ciphertable[] = { + /* SSL version 3.0 and initial TLS 1.0 cipher suites. + Defined since SDK 10.2.8 */ + CIPHER_DEF_SSLTLS(NULL_WITH_NULL_NULL, /* 0x0000 */ + NULL, + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF_SSLTLS(RSA_WITH_NULL_MD5, /* 0x0001 */ + "NULL-MD5", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF_SSLTLS(RSA_WITH_NULL_SHA, /* 0x0002 */ + "NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF_SSLTLS(RSA_EXPORT_WITH_RC4_40_MD5, /* 0x0003 */ + "EXP-RC4-MD5", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF_SSLTLS(RSA_WITH_RC4_128_MD5, /* 0x0004 */ + "RC4-MD5", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF_SSLTLS(RSA_WITH_RC4_128_SHA, /* 0x0005 */ + "RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF_SSLTLS(RSA_EXPORT_WITH_RC2_CBC_40_MD5, /* 0x0006 */ + "EXP-RC2-CBC-MD5", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF_SSLTLS(RSA_WITH_IDEA_CBC_SHA, /* 0x0007 */ + "IDEA-CBC-SHA", + CIPHER_WEAK_IDEA_ENCRYPTION), + CIPHER_DEF_SSLTLS(RSA_EXPORT_WITH_DES40_CBC_SHA, /* 0x0008 */ + "EXP-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(RSA_WITH_DES_CBC_SHA, /* 0x0009 */ + "DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(RSA_WITH_3DES_EDE_CBC_SHA, /* 0x000A */ + "DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DH_DSS_EXPORT_WITH_DES40_CBC_SHA, /* 0x000B */ + "EXP-DH-DSS-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DH_DSS_WITH_DES_CBC_SHA, /* 0x000C */ + "DH-DSS-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DH_DSS_WITH_3DES_EDE_CBC_SHA, /* 0x000D */ + "DH-DSS-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DH_RSA_EXPORT_WITH_DES40_CBC_SHA, /* 0x000E */ + "EXP-DH-RSA-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DH_RSA_WITH_DES_CBC_SHA, /* 0x000F */ + "DH-RSA-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DH_RSA_WITH_3DES_EDE_CBC_SHA, /* 0x0010 */ + "DH-RSA-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, /* 0x0011 */ + "EXP-EDH-DSS-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DHE_DSS_WITH_DES_CBC_SHA, /* 0x0012 */ + "EDH-DSS-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DHE_DSS_WITH_3DES_EDE_CBC_SHA, /* 0x0013 */ + "DHE-DSS-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, /* 0x0014 */ + "EXP-EDH-RSA-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DHE_RSA_WITH_DES_CBC_SHA, /* 0x0015 */ + "EDH-RSA-DES-CBC-SHA", + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DHE_RSA_WITH_3DES_EDE_CBC_SHA, /* 0x0016 */ + "DHE-RSA-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF_SSLTLS(DH_anon_EXPORT_WITH_RC4_40_MD5, /* 0x0017 */ + "EXP-ADH-RC4-MD5", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF_SSLTLS(DH_anon_WITH_RC4_128_MD5, /* 0x0018 */ + "ADH-RC4-MD5", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF_SSLTLS(DH_anon_EXPORT_WITH_DES40_CBC_SHA, /* 0x0019 */ + "EXP-ADH-DES-CBC-SHA", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF_SSLTLS(DH_anon_WITH_DES_CBC_SHA, /* 0x001A */ + "ADH-DES-CBC-SHA", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF_SSLTLS(DH_anon_WITH_3DES_EDE_CBC_SHA, /* 0x001B */ + "ADH-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(SSL_FORTEZZA_DMS_WITH_NULL_SHA, /* 0x001C */ + NULL, + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA, /* 0x001D */ + NULL, + CIPHER_STRONG_ENOUGH), + +#if CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 + /* RFC 4785 - Pre-Shared Key (PSK) Ciphersuites with NULL Encryption */ + CIPHER_DEF(TLS_PSK_WITH_NULL_SHA, /* 0x002C */ + "PSK-NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_DHE_PSK_WITH_NULL_SHA, /* 0x002D */ + "DHE-PSK-NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_RSA_PSK_WITH_NULL_SHA, /* 0x002E */ + "RSA-PSK-NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), +#endif /* CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 */ + + /* TLS addenda using AES, per RFC 3268. Defined since SDK 10.4u */ + CIPHER_DEF(TLS_RSA_WITH_AES_128_CBC_SHA, /* 0x002F */ + "AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_DSS_WITH_AES_128_CBC_SHA, /* 0x0030 */ + "DH-DSS-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_RSA_WITH_AES_128_CBC_SHA, /* 0x0031 */ + "DH-RSA-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_DSS_WITH_AES_128_CBC_SHA, /* 0x0032 */ + "DHE-DSS-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_RSA_WITH_AES_128_CBC_SHA, /* 0x0033 */ + "DHE-RSA-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_anon_WITH_AES_128_CBC_SHA, /* 0x0034 */ + "ADH-AES128-SHA", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF(TLS_RSA_WITH_AES_256_CBC_SHA, /* 0x0035 */ + "AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_DSS_WITH_AES_256_CBC_SHA, /* 0x0036 */ + "DH-DSS-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_RSA_WITH_AES_256_CBC_SHA, /* 0x0037 */ + "DH-RSA-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_DSS_WITH_AES_256_CBC_SHA, /* 0x0038 */ + "DHE-DSS-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_RSA_WITH_AES_256_CBC_SHA, /* 0x0039 */ + "DHE-RSA-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_anon_WITH_AES_256_CBC_SHA, /* 0x003A */ + "ADH-AES256-SHA", + CIPHER_WEAK_ANON_AUTH), + +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + /* TLS 1.2 addenda, RFC 5246 */ + /* Server provided RSA certificate for key exchange. */ + CIPHER_DEF(TLS_RSA_WITH_NULL_SHA256, /* 0x003B */ + "NULL-SHA256", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_RSA_WITH_AES_128_CBC_SHA256, /* 0x003C */ + "AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_WITH_AES_256_CBC_SHA256, /* 0x003D */ + "AES256-SHA256", + CIPHER_STRONG_ENOUGH), + /* Server-authenticated (and optionally client-authenticated) + Diffie-Hellman. */ + CIPHER_DEF(TLS_DH_DSS_WITH_AES_128_CBC_SHA256, /* 0x003E */ + "DH-DSS-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_RSA_WITH_AES_128_CBC_SHA256, /* 0x003F */ + "DH-RSA-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, /* 0x0040 */ + "DHE-DSS-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + + /* TLS 1.2 addenda, RFC 5246 */ + CIPHER_DEF(TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, /* 0x0067 */ + "DHE-RSA-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_DSS_WITH_AES_256_CBC_SHA256, /* 0x0068 */ + "DH-DSS-AES256-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_RSA_WITH_AES_256_CBC_SHA256, /* 0x0069 */ + "DH-RSA-AES256-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, /* 0x006A */ + "DHE-DSS-AES256-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, /* 0x006B */ + "DHE-RSA-AES256-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_anon_WITH_AES_128_CBC_SHA256, /* 0x006C */ + "ADH-AES128-SHA256", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF(TLS_DH_anon_WITH_AES_256_CBC_SHA256, /* 0x006D */ + "ADH-AES256-SHA256", + CIPHER_WEAK_ANON_AUTH), +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ + +#if CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 + /* Addendum from RFC 4279, TLS PSK */ + CIPHER_DEF(TLS_PSK_WITH_RC4_128_SHA, /* 0x008A */ + "PSK-RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(TLS_PSK_WITH_3DES_EDE_CBC_SHA, /* 0x008B */ + "PSK-3DES-EDE-CBC-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(TLS_PSK_WITH_AES_128_CBC_SHA, /* 0x008C */ + "PSK-AES128-CBC-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_PSK_WITH_AES_256_CBC_SHA, /* 0x008D */ + "PSK-AES256-CBC-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_PSK_WITH_RC4_128_SHA, /* 0x008E */ + "DHE-PSK-RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(TLS_DHE_PSK_WITH_3DES_EDE_CBC_SHA, /* 0x008F */ + "DHE-PSK-3DES-EDE-CBC-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(TLS_DHE_PSK_WITH_AES_128_CBC_SHA, /* 0x0090 */ + "DHE-PSK-AES128-CBC-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_PSK_WITH_AES_256_CBC_SHA, /* 0x0091 */ + "DHE-PSK-AES256-CBC-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_PSK_WITH_RC4_128_SHA, /* 0x0092 */ + "RSA-PSK-RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(TLS_RSA_PSK_WITH_3DES_EDE_CBC_SHA, /* 0x0093 */ + "RSA-PSK-3DES-EDE-CBC-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(TLS_RSA_PSK_WITH_AES_128_CBC_SHA, /* 0x0094 */ + "RSA-PSK-AES128-CBC-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_PSK_WITH_AES_256_CBC_SHA, /* 0x0095 */ + "RSA-PSK-AES256-CBC-SHA", + CIPHER_STRONG_ENOUGH), +#endif /* CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 */ + +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + /* Addenda from rfc 5288 AES Galois Counter Mode (GCM) Cipher Suites + for TLS. */ + CIPHER_DEF(TLS_RSA_WITH_AES_128_GCM_SHA256, /* 0x009C */ + "AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_WITH_AES_256_GCM_SHA384, /* 0x009D */ + "AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, /* 0x009E */ + "DHE-RSA-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, /* 0x009F */ + "DHE-RSA-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_RSA_WITH_AES_128_GCM_SHA256, /* 0x00A0 */ + "DH-RSA-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_RSA_WITH_AES_256_GCM_SHA384, /* 0x00A1 */ + "DH-RSA-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, /* 0x00A2 */ + "DHE-DSS-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, /* 0x00A3 */ + "DHE-DSS-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_DSS_WITH_AES_128_GCM_SHA256, /* 0x00A4 */ + "DH-DSS-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_DSS_WITH_AES_256_GCM_SHA384, /* 0x00A5 */ + "DH-DSS-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DH_anon_WITH_AES_128_GCM_SHA256, /* 0x00A6 */ + "ADH-AES128-GCM-SHA256", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF(TLS_DH_anon_WITH_AES_256_GCM_SHA384, /* 0x00A7 */ + "ADH-AES256-GCM-SHA384", + CIPHER_WEAK_ANON_AUTH), +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ + +#if CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 + /* RFC 5487 - PSK with SHA-256/384 and AES GCM */ + CIPHER_DEF(TLS_PSK_WITH_AES_128_GCM_SHA256, /* 0x00A8 */ + "PSK-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_PSK_WITH_AES_256_GCM_SHA384, /* 0x00A9 */ + "PSK-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_PSK_WITH_AES_128_GCM_SHA256, /* 0x00AA */ + "DHE-PSK-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_PSK_WITH_AES_256_GCM_SHA384, /* 0x00AB */ + "DHE-PSK-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_PSK_WITH_AES_128_GCM_SHA256, /* 0x00AC */ + "RSA-PSK-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_PSK_WITH_AES_256_GCM_SHA384, /* 0x00AD */ + "RSA-PSK-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_PSK_WITH_AES_128_CBC_SHA256, /* 0x00AE */ + "PSK-AES128-CBC-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_PSK_WITH_AES_256_CBC_SHA384, /* 0x00AF */ + "PSK-AES256-CBC-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_PSK_WITH_NULL_SHA256, /* 0x00B0 */ + "PSK-NULL-SHA256", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_PSK_WITH_NULL_SHA384, /* 0x00B1 */ + "PSK-NULL-SHA384", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_DHE_PSK_WITH_AES_128_CBC_SHA256, /* 0x00B2 */ + "DHE-PSK-AES128-CBC-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_PSK_WITH_AES_256_CBC_SHA384, /* 0x00B3 */ + "DHE-PSK-AES256-CBC-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_DHE_PSK_WITH_NULL_SHA256, /* 0x00B4 */ + "DHE-PSK-NULL-SHA256", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_DHE_PSK_WITH_NULL_SHA384, /* 0x00B5 */ + "DHE-PSK-NULL-SHA384", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_RSA_PSK_WITH_AES_128_CBC_SHA256, /* 0x00B6 */ + "RSA-PSK-AES128-CBC-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_PSK_WITH_AES_256_CBC_SHA384, /* 0x00B7 */ + "RSA-PSK-AES256-CBC-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_RSA_PSK_WITH_NULL_SHA256, /* 0x00B8 */ + "RSA-PSK-NULL-SHA256", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_RSA_PSK_WITH_NULL_SHA384, /* 0x00B9 */ + "RSA-PSK-NULL-SHA384", + CIPHER_WEAK_NOT_ENCRYPTED), +#endif /* CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 */ + + /* RFC 5746 - Secure Renegotiation. This is not a real suite, + it is a response to initiate negotiation again */ + CIPHER_DEF(TLS_EMPTY_RENEGOTIATION_INFO_SCSV, /* 0x00FF */ + NULL, + CIPHER_STRONG_ENOUGH), + +#if CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11 + /* TLS 1.3 standard cipher suites for ChaCha20+Poly1305. + Note: TLS 1.3 ciphersuites do not specify the key exchange + algorithm -- they only specify the symmetric ciphers. + Cipher alias name matches to OpenSSL cipher name, and for + TLS 1.3 ciphers */ + CIPHER_DEF(TLS_AES_128_GCM_SHA256, /* 0x1301 */ + NULL, /* The OpenSSL cipher name matches to the IANA name */ + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_AES_256_GCM_SHA384, /* 0x1302 */ + NULL, /* The OpenSSL cipher name matches to the IANA name */ + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_CHACHA20_POLY1305_SHA256, /* 0x1303 */ + NULL, /* The OpenSSL cipher name matches to the IANA name */ + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_AES_128_CCM_SHA256, /* 0x1304 */ + NULL, /* The OpenSSL cipher name matches to the IANA name */ + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_AES_128_CCM_8_SHA256, /* 0x1305 */ + NULL, /* The OpenSSL cipher name matches to the IANA name */ + CIPHER_STRONG_ENOUGH), +#endif /* CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11 */ + +#if CURL_BUILD_MAC_10_6 || CURL_BUILD_IOS + /* ECDSA addenda, RFC 4492 */ + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_NULL_SHA, /* 0xC001 */ + "ECDH-ECDSA-NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_RC4_128_SHA, /* 0xC002 */ + "ECDH-ECDSA-RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA, /* 0xC003 */ + "ECDH-ECDSA-DES-CBC3-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA, /* 0xC004 */ + "ECDH-ECDSA-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA, /* 0xC005 */ + "ECDH-ECDSA-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_NULL_SHA, /* 0xC006 */ + "ECDHE-ECDSA-NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, /* 0xC007 */ + "ECDHE-ECDSA-RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA, /* 0xC008 */ + "ECDHE-ECDSA-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, /* 0xC009 */ + "ECDHE-ECDSA-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, /* 0xC00A */ + "ECDHE-ECDSA-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_RSA_WITH_NULL_SHA, /* 0xC00B */ + "ECDH-RSA-NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_ECDH_RSA_WITH_RC4_128_SHA, /* 0xC00C */ + "ECDH-RSA-RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA, /* 0xC00D */ + "ECDH-RSA-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(TLS_ECDH_RSA_WITH_AES_128_CBC_SHA, /* 0xC00E */ + "ECDH-RSA-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_RSA_WITH_AES_256_CBC_SHA, /* 0xC00F */ + "ECDH-RSA-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_NULL_SHA, /* 0xC010 */ + "ECDHE-RSA-NULL-SHA", + CIPHER_WEAK_NOT_ENCRYPTED), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_RC4_128_SHA, /* 0xC011 */ + "ECDHE-RSA-RC4-SHA", + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, /* 0xC012 */ + "ECDHE-RSA-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, /* 0xC013 */ + "ECDHE-RSA-AES128-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, /* 0xC014 */ + "ECDHE-RSA-AES256-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_anon_WITH_NULL_SHA, /* 0xC015 */ + "AECDH-NULL-SHA", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF(TLS_ECDH_anon_WITH_RC4_128_SHA, /* 0xC016 */ + "AECDH-RC4-SHA", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF(TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA, /* 0xC017 */ + "AECDH-DES-CBC3-SHA", + CIPHER_WEAK_3DES_ENCRYPTION), + CIPHER_DEF(TLS_ECDH_anon_WITH_AES_128_CBC_SHA, /* 0xC018 */ + "AECDH-AES128-SHA", + CIPHER_WEAK_ANON_AUTH), + CIPHER_DEF(TLS_ECDH_anon_WITH_AES_256_CBC_SHA, /* 0xC019 */ + "AECDH-AES256-SHA", + CIPHER_WEAK_ANON_AUTH), +#endif /* CURL_BUILD_MAC_10_6 || CURL_BUILD_IOS */ + +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + /* Addenda from rfc 5289 Elliptic Curve Cipher Suites with + HMAC SHA-256/384. */ + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, /* 0xC023 */ + "ECDHE-ECDSA-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, /* 0xC024 */ + "ECDHE-ECDSA-AES256-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256, /* 0xC025 */ + "ECDH-ECDSA-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384, /* 0xC026 */ + "ECDH-ECDSA-AES256-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, /* 0xC027 */ + "ECDHE-RSA-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, /* 0xC028 */ + "ECDHE-RSA-AES256-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256, /* 0xC029 */ + "ECDH-RSA-AES128-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384, /* 0xC02A */ + "ECDH-RSA-AES256-SHA384", + CIPHER_STRONG_ENOUGH), + /* Addenda from rfc 5289 Elliptic Curve Cipher Suites with + SHA-256/384 and AES Galois Counter Mode (GCM) */ + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, /* 0xC02B */ + "ECDHE-ECDSA-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, /* 0xC02C */ + "ECDHE-ECDSA-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, /* 0xC02D */ + "ECDH-ECDSA-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, /* 0xC02E */ + "ECDH-ECDSA-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, /* 0xC02F */ + "ECDHE-RSA-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, /* 0xC030 */ + "ECDHE-RSA-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256, /* 0xC031 */ + "ECDH-RSA-AES128-GCM-SHA256", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384, /* 0xC032 */ + "ECDH-RSA-AES256-GCM-SHA384", + CIPHER_STRONG_ENOUGH), +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ + +#if CURL_BUILD_MAC_10_15 || CURL_BUILD_IOS_13 + /* ECDHE_PSK Cipher Suites for Transport Layer Security (TLS), RFC 5489 */ + CIPHER_DEF(TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA, /* 0xC035 */ + "ECDHE-PSK-AES128-CBC-SHA", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_PSK_WITH_AES_256_CBC_SHA, /* 0xC036 */ + "ECDHE-PSK-AES256-CBC-SHA", + CIPHER_STRONG_ENOUGH), +#endif /* CURL_BUILD_MAC_10_15 || CURL_BUILD_IOS_13 */ + +#if CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11 + /* Addenda from rfc 7905 ChaCha20-Poly1305 Cipher Suites for + Transport Layer Security (TLS). */ + CIPHER_DEF(TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, /* 0xCCA8 */ + "ECDHE-RSA-CHACHA20-POLY1305", + CIPHER_STRONG_ENOUGH), + CIPHER_DEF(TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, /* 0xCCA9 */ + "ECDHE-ECDSA-CHACHA20-POLY1305", + CIPHER_STRONG_ENOUGH), +#endif /* CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11 */ + +#if CURL_BUILD_MAC_10_15 || CURL_BUILD_IOS_13 + /* ChaCha20-Poly1305 Cipher Suites for Transport Layer Security (TLS), + RFC 7905 */ + CIPHER_DEF(TLS_PSK_WITH_CHACHA20_POLY1305_SHA256, /* 0xCCAB */ + "PSK-CHACHA20-POLY1305", + CIPHER_STRONG_ENOUGH), +#endif /* CURL_BUILD_MAC_10_15 || CURL_BUILD_IOS_13 */ + + /* Tags for SSL 2 cipher kinds which are not specified for SSL 3. + Defined since SDK 10.2.8 */ + CIPHER_DEF(SSL_RSA_WITH_RC2_CBC_MD5, /* 0xFF80 */ + NULL, + CIPHER_WEAK_RC_ENCRYPTION), + CIPHER_DEF(SSL_RSA_WITH_IDEA_CBC_MD5, /* 0xFF81 */ + NULL, + CIPHER_WEAK_IDEA_ENCRYPTION), + CIPHER_DEF(SSL_RSA_WITH_DES_CBC_MD5, /* 0xFF82 */ + NULL, + CIPHER_WEAK_DES_ENCRYPTION), + CIPHER_DEF(SSL_RSA_WITH_3DES_EDE_CBC_MD5, /* 0xFF83 */ + NULL, + CIPHER_WEAK_3DES_ENCRYPTION), +}; + +#define NUM_OF_CIPHERS sizeof(ciphertable)/sizeof(ciphertable[0]) + + +/* pinned public key support tests */ + +/* version 1 supports macOS 10.12+ and iOS 10+ */ +#if ((TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 100000) || \ + (!TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 101200)) +#define SECTRANSP_PINNEDPUBKEY_V1 1 +#endif + +/* version 2 supports MacOSX 10.7+ */ +#if (!TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070) +#define SECTRANSP_PINNEDPUBKEY_V2 1 +#endif + +#if defined(SECTRANSP_PINNEDPUBKEY_V1) || defined(SECTRANSP_PINNEDPUBKEY_V2) +/* this backend supports CURLOPT_PINNEDPUBLICKEY */ +#define SECTRANSP_PINNEDPUBKEY 1 +#endif /* SECTRANSP_PINNEDPUBKEY */ + +#ifdef SECTRANSP_PINNEDPUBKEY +/* both new and old APIs return rsa keys missing the spki header (not DER) */ +static const unsigned char rsa4096SpkiHeader[] = { + 0x30, 0x82, 0x02, 0x22, 0x30, 0x0d, + 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, + 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, + 0x00, 0x03, 0x82, 0x02, 0x0f, 0x00}; + +static const unsigned char rsa2048SpkiHeader[] = { + 0x30, 0x82, 0x01, 0x22, 0x30, 0x0d, + 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, + 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, + 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00}; +#ifdef SECTRANSP_PINNEDPUBKEY_V1 +/* the *new* version doesn't return DER encoded ecdsa certs like the old... */ +static const unsigned char ecDsaSecp256r1SpkiHeader[] = { + 0x30, 0x59, 0x30, 0x13, 0x06, 0x07, + 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, + 0x01, 0x06, 0x08, 0x2a, 0x86, 0x48, + 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03, + 0x42, 0x00}; + +static const unsigned char ecDsaSecp384r1SpkiHeader[] = { + 0x30, 0x76, 0x30, 0x10, 0x06, 0x07, + 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, + 0x01, 0x06, 0x05, 0x2b, 0x81, 0x04, + 0x00, 0x22, 0x03, 0x62, 0x00}; +#endif /* SECTRANSP_PINNEDPUBKEY_V1 */ +#endif /* SECTRANSP_PINNEDPUBKEY */ + +/* The following two functions were ripped from Apple sample code, + * with some modifications: */ +static OSStatus SocketRead(SSLConnectionRef connection, + void *data, /* owned by + * caller, data + * RETURNED */ + size_t *dataLength) /* IN/OUT */ +{ + size_t bytesToGo = *dataLength; + size_t initLen = bytesToGo; + UInt8 *currData = (UInt8 *)data; + /*int sock = *(int *)connection;*/ + struct ssl_connect_data *connssl = (struct ssl_connect_data *)connection; + struct ssl_backend_data *backend = connssl->backend; + int sock = backend->ssl_sockfd; + OSStatus rtn = noErr; + size_t bytesRead; + ssize_t rrtn; + int theErr; + + *dataLength = 0; + + for(;;) { + bytesRead = 0; + rrtn = read(sock, currData, bytesToGo); + if(rrtn <= 0) { + /* this is guesswork... */ + theErr = errno; + if(rrtn == 0) { /* EOF = server hung up */ + /* the framework will turn this into errSSLClosedNoNotify */ + rtn = errSSLClosedGraceful; + } + else /* do the switch */ + switch(theErr) { + case ENOENT: + /* connection closed */ + rtn = errSSLClosedGraceful; + break; + case ECONNRESET: + rtn = errSSLClosedAbort; + break; + case EAGAIN: + rtn = errSSLWouldBlock; + backend->ssl_direction = false; + break; + default: + rtn = ioErr; + break; + } + break; + } + else { + bytesRead = rrtn; + } + bytesToGo -= bytesRead; + currData += bytesRead; + + if(bytesToGo == 0) { + /* filled buffer with incoming data, done */ + break; + } + } + *dataLength = initLen - bytesToGo; + + return rtn; +} + +static OSStatus SocketWrite(SSLConnectionRef connection, + const void *data, + size_t *dataLength) /* IN/OUT */ +{ + size_t bytesSent = 0; + /*int sock = *(int *)connection;*/ + struct ssl_connect_data *connssl = (struct ssl_connect_data *)connection; + struct ssl_backend_data *backend = connssl->backend; + int sock = backend->ssl_sockfd; + ssize_t length; + size_t dataLen = *dataLength; + const UInt8 *dataPtr = (UInt8 *)data; + OSStatus ortn; + int theErr; + + *dataLength = 0; + + do { + length = write(sock, + (char *)dataPtr + bytesSent, + dataLen - bytesSent); + } while((length > 0) && + ( (bytesSent += length) < dataLen) ); + + if(length <= 0) { + theErr = errno; + if(theErr == EAGAIN) { + ortn = errSSLWouldBlock; + backend->ssl_direction = true; + } + else { + ortn = ioErr; + } + } + else { + ortn = noErr; + } + *dataLength = bytesSent; + return ortn; +} + +#ifndef CURL_DISABLE_VERBOSE_STRINGS +CF_INLINE const char *TLSCipherNameForNumber(SSLCipherSuite cipher) +{ + /* The first ciphers in the ciphertable are continuos. Here we do small + optimization and instead of loop directly get SSL name by cipher number. + */ + if(cipher <= SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA) { + return ciphertable[cipher].name; + } + /* Iterate through the rest of the ciphers */ + for(size_t i = SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA + 1; + i < NUM_OF_CIPHERS; + ++i) { + if(ciphertable[i].num == cipher) { + return ciphertable[i].name; + } + } + return ciphertable[SSL_NULL_WITH_NULL_NULL].name; +} +#endif /* !CURL_DISABLE_VERBOSE_STRINGS */ + +#if CURL_BUILD_MAC +CF_INLINE void GetDarwinVersionNumber(int *major, int *minor) +{ + int mib[2]; + char *os_version; + size_t os_version_len; + char *os_version_major, *os_version_minor; + char *tok_buf; + + /* Get the Darwin kernel version from the kernel using sysctl(): */ + mib[0] = CTL_KERN; + mib[1] = KERN_OSRELEASE; + if(sysctl(mib, 2, NULL, &os_version_len, NULL, 0) == -1) + return; + os_version = malloc(os_version_len*sizeof(char)); + if(!os_version) + return; + if(sysctl(mib, 2, os_version, &os_version_len, NULL, 0) == -1) { + free(os_version); + return; + } + + /* Parse the version: */ + os_version_major = strtok_r(os_version, ".", &tok_buf); + os_version_minor = strtok_r(NULL, ".", &tok_buf); + *major = atoi(os_version_major); + *minor = atoi(os_version_minor); + free(os_version); +} +#endif /* CURL_BUILD_MAC */ + +/* Apple provides a myriad of ways of getting information about a certificate + into a string. Some aren't available under iOS or newer cats. So here's + a unified function for getting a string describing the certificate that + ought to work in all cats starting with Leopard. */ +CF_INLINE CFStringRef getsubject(SecCertificateRef cert) +{ + CFStringRef server_cert_summary = CFSTR("(null)"); + +#if CURL_BUILD_IOS + /* iOS: There's only one way to do this. */ + server_cert_summary = SecCertificateCopySubjectSummary(cert); +#else +#if CURL_BUILD_MAC_10_7 + /* Lion & later: Get the long description if we can. */ + if(SecCertificateCopyLongDescription) + server_cert_summary = + SecCertificateCopyLongDescription(NULL, cert, NULL); + else +#endif /* CURL_BUILD_MAC_10_7 */ +#if CURL_BUILD_MAC_10_6 + /* Snow Leopard: Get the certificate summary. */ + if(SecCertificateCopySubjectSummary) + server_cert_summary = SecCertificateCopySubjectSummary(cert); + else +#endif /* CURL_BUILD_MAC_10_6 */ + /* Leopard is as far back as we go... */ + (void)SecCertificateCopyCommonName(cert, &server_cert_summary); +#endif /* CURL_BUILD_IOS */ + return server_cert_summary; +} + +static CURLcode CopyCertSubject(struct Curl_easy *data, + SecCertificateRef cert, char **certp) +{ + CFStringRef c = getsubject(cert); + CURLcode result = CURLE_OK; + const char *direct; + char *cbuf = NULL; + *certp = NULL; + + if(!c) { + failf(data, "SSL: invalid CA certificate subject"); + return CURLE_PEER_FAILED_VERIFICATION; + } + + /* If the subject is already available as UTF-8 encoded (ie 'direct') then + use that, else convert it. */ + direct = CFStringGetCStringPtr(c, kCFStringEncodingUTF8); + if(direct) { + *certp = strdup(direct); + if(!*certp) { + failf(data, "SSL: out of memory"); + result = CURLE_OUT_OF_MEMORY; + } + } + else { + size_t cbuf_size = ((size_t)CFStringGetLength(c) * 4) + 1; + cbuf = calloc(cbuf_size, 1); + if(cbuf) { + if(!CFStringGetCString(c, cbuf, cbuf_size, + kCFStringEncodingUTF8)) { + failf(data, "SSL: invalid CA certificate subject"); + result = CURLE_PEER_FAILED_VERIFICATION; + } + else + /* pass back the buffer */ + *certp = cbuf; + } + else { + failf(data, "SSL: couldn't allocate %zu bytes of memory", cbuf_size); + result = CURLE_OUT_OF_MEMORY; + } + } + if(result) + free(cbuf); + CFRelease(c); + return result; +} + +#if CURL_SUPPORT_MAC_10_6 +/* The SecKeychainSearch API was deprecated in Lion, and using it will raise + deprecation warnings, so let's not compile this unless it's necessary: */ +static OSStatus CopyIdentityWithLabelOldSchool(char *label, + SecIdentityRef *out_c_a_k) +{ + OSStatus status = errSecItemNotFound; + SecKeychainAttributeList attr_list; + SecKeychainAttribute attr; + SecKeychainSearchRef search = NULL; + SecCertificateRef cert = NULL; + + /* Set up the attribute list: */ + attr_list.count = 1L; + attr_list.attr = &attr; + + /* Set up our lone search criterion: */ + attr.tag = kSecLabelItemAttr; + attr.data = label; + attr.length = (UInt32)strlen(label); + + /* Start searching: */ + status = SecKeychainSearchCreateFromAttributes(NULL, + kSecCertificateItemClass, + &attr_list, + &search); + if(status == noErr) { + status = SecKeychainSearchCopyNext(search, + (SecKeychainItemRef *)&cert); + if(status == noErr && cert) { + /* If we found a certificate, does it have a private key? */ + status = SecIdentityCreateWithCertificate(NULL, cert, out_c_a_k); + CFRelease(cert); + } + } + + if(search) + CFRelease(search); + return status; +} +#endif /* CURL_SUPPORT_MAC_10_6 */ + +static OSStatus CopyIdentityWithLabel(char *label, + SecIdentityRef *out_cert_and_key) +{ + OSStatus status = errSecItemNotFound; + +#if CURL_BUILD_MAC_10_7 || CURL_BUILD_IOS + CFArrayRef keys_list; + CFIndex keys_list_count; + CFIndex i; + CFStringRef common_name; + + /* SecItemCopyMatching() was introduced in iOS and Snow Leopard. + kSecClassIdentity was introduced in Lion. If both exist, let's use them + to find the certificate. */ + if(SecItemCopyMatching && kSecClassIdentity) { + CFTypeRef keys[5]; + CFTypeRef values[5]; + CFDictionaryRef query_dict; + CFStringRef label_cf = CFStringCreateWithCString(NULL, label, + kCFStringEncodingUTF8); + + /* Set up our search criteria and expected results: */ + values[0] = kSecClassIdentity; /* we want a certificate and a key */ + keys[0] = kSecClass; + values[1] = kCFBooleanTrue; /* we want a reference */ + keys[1] = kSecReturnRef; + values[2] = kSecMatchLimitAll; /* kSecMatchLimitOne would be better if the + * label matching below worked correctly */ + keys[2] = kSecMatchLimit; + /* identity searches need a SecPolicyRef in order to work */ + values[3] = SecPolicyCreateSSL(false, NULL); + keys[3] = kSecMatchPolicy; + /* match the name of the certificate (doesn't work in macOS 10.12.1) */ + values[4] = label_cf; + keys[4] = kSecAttrLabel; + query_dict = CFDictionaryCreate(NULL, (const void **)keys, + (const void **)values, 5L, + &kCFCopyStringDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks); + CFRelease(values[3]); + + /* Do we have a match? */ + status = SecItemCopyMatching(query_dict, (CFTypeRef *) &keys_list); + + /* Because kSecAttrLabel matching doesn't work with kSecClassIdentity, + * we need to find the correct identity ourselves */ + if(status == noErr) { + keys_list_count = CFArrayGetCount(keys_list); + *out_cert_and_key = NULL; + status = 1; + for(i = 0; i<keys_list_count; i++) { + OSStatus err = noErr; + SecCertificateRef cert = NULL; + SecIdentityRef identity = + (SecIdentityRef) CFArrayGetValueAtIndex(keys_list, i); + err = SecIdentityCopyCertificate(identity, &cert); + if(err == noErr) { + OSStatus copy_status = noErr; +#if CURL_BUILD_IOS + common_name = SecCertificateCopySubjectSummary(cert); +#elif CURL_BUILD_MAC_10_7 + copy_status = SecCertificateCopyCommonName(cert, &common_name); +#endif + if(copy_status == noErr && + CFStringCompare(common_name, label_cf, 0) == kCFCompareEqualTo) { + CFRelease(cert); + CFRelease(common_name); + CFRetain(identity); + *out_cert_and_key = identity; + status = noErr; + break; + } + CFRelease(common_name); + } + CFRelease(cert); + } + } + + if(keys_list) + CFRelease(keys_list); + CFRelease(query_dict); + CFRelease(label_cf); + } + else { +#if CURL_SUPPORT_MAC_10_6 + /* On Leopard and Snow Leopard, fall back to SecKeychainSearch. */ + status = CopyIdentityWithLabelOldSchool(label, out_cert_and_key); +#endif /* CURL_SUPPORT_MAC_10_6 */ + } +#elif CURL_SUPPORT_MAC_10_6 + /* For developers building on older cats, we have no choice but to fall back + to SecKeychainSearch. */ + status = CopyIdentityWithLabelOldSchool(label, out_cert_and_key); +#endif /* CURL_BUILD_MAC_10_7 || CURL_BUILD_IOS */ + return status; +} + +static OSStatus CopyIdentityFromPKCS12File(const char *cPath, + const struct curl_blob *blob, + const char *cPassword, + SecIdentityRef *out_cert_and_key) +{ + OSStatus status = errSecItemNotFound; + CFURLRef pkcs_url = NULL; + CFStringRef password = cPassword ? CFStringCreateWithCString(NULL, + cPassword, kCFStringEncodingUTF8) : NULL; + CFDataRef pkcs_data = NULL; + + /* We can import P12 files on iOS or OS X 10.7 or later: */ + /* These constants are documented as having first appeared in 10.6 but they + raise linker errors when used on that cat for some reason. */ +#if CURL_BUILD_MAC_10_7 || CURL_BUILD_IOS + bool resource_imported; + + if(blob) { + pkcs_data = CFDataCreate(kCFAllocatorDefault, + (const unsigned char *)blob->data, blob->len); + status = (pkcs_data != NULL) ? errSecSuccess : errSecAllocate; + resource_imported = (pkcs_data != NULL); + } + else { + pkcs_url = + CFURLCreateFromFileSystemRepresentation(NULL, + (const UInt8 *)cPath, + strlen(cPath), false); + resource_imported = + CFURLCreateDataAndPropertiesFromResource(NULL, + pkcs_url, &pkcs_data, + NULL, NULL, &status); + } + + if(resource_imported) { + CFArrayRef items = NULL; + + /* On iOS SecPKCS12Import will never add the client certificate to the + * Keychain. + * + * It gives us back a SecIdentityRef that we can use directly. */ +#if CURL_BUILD_IOS + const void *cKeys[] = {kSecImportExportPassphrase}; + const void *cValues[] = {password}; + CFDictionaryRef options = CFDictionaryCreate(NULL, cKeys, cValues, + password ? 1L : 0L, NULL, NULL); + + if(options) { + status = SecPKCS12Import(pkcs_data, options, &items); + CFRelease(options); + } + + + /* On macOS SecPKCS12Import will always add the client certificate to + * the Keychain. + * + * As this doesn't match iOS, and apps may not want to see their client + * certificate saved in the user's keychain, we use SecItemImport + * with a NULL keychain to avoid importing it. + * + * This returns a SecCertificateRef from which we can construct a + * SecIdentityRef. + */ +#elif CURL_BUILD_MAC_10_7 + SecItemImportExportKeyParameters keyParams; + SecExternalFormat inputFormat = kSecFormatPKCS12; + SecExternalItemType inputType = kSecItemTypeCertificate; + + memset(&keyParams, 0x00, sizeof(keyParams)); + keyParams.version = SEC_KEY_IMPORT_EXPORT_PARAMS_VERSION; + keyParams.passphrase = password; + + status = SecItemImport(pkcs_data, NULL, &inputFormat, &inputType, + 0, &keyParams, NULL, &items); +#endif + + + /* Extract the SecIdentityRef */ + if(status == errSecSuccess && items && CFArrayGetCount(items)) { + CFIndex i, count; + count = CFArrayGetCount(items); + + for(i = 0; i < count; i++) { + CFTypeRef item = (CFTypeRef) CFArrayGetValueAtIndex(items, i); + CFTypeID itemID = CFGetTypeID(item); + + if(itemID == CFDictionaryGetTypeID()) { + CFTypeRef identity = (CFTypeRef) CFDictionaryGetValue( + (CFDictionaryRef) item, + kSecImportItemIdentity); + CFRetain(identity); + *out_cert_and_key = (SecIdentityRef) identity; + break; + } +#if CURL_BUILD_MAC_10_7 + else if(itemID == SecCertificateGetTypeID()) { + status = SecIdentityCreateWithCertificate(NULL, + (SecCertificateRef) item, + out_cert_and_key); + break; + } +#endif + } + } + + if(items) + CFRelease(items); + CFRelease(pkcs_data); + } +#endif /* CURL_BUILD_MAC_10_7 || CURL_BUILD_IOS */ + if(password) + CFRelease(password); + if(pkcs_url) + CFRelease(pkcs_url); + return status; +} + +/* This code was borrowed from nss.c, with some modifications: + * Determine whether the nickname passed in is a filename that needs to + * be loaded as a PEM or a regular NSS nickname. + * + * returns 1 for a file + * returns 0 for not a file + */ +CF_INLINE bool is_file(const char *filename) +{ + struct_stat st; + + if(!filename) + return false; + + if(stat(filename, &st) == 0) + return S_ISREG(st.st_mode); + return false; +} + +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS +static CURLcode sectransp_version_from_curl(SSLProtocol *darwinver, + long ssl_version) +{ + switch(ssl_version) { + case CURL_SSLVERSION_TLSv1_0: + *darwinver = kTLSProtocol1; + return CURLE_OK; + case CURL_SSLVERSION_TLSv1_1: + *darwinver = kTLSProtocol11; + return CURLE_OK; + case CURL_SSLVERSION_TLSv1_2: + *darwinver = kTLSProtocol12; + return CURLE_OK; + case CURL_SSLVERSION_TLSv1_3: + /* TLS 1.3 support first appeared in iOS 11 and macOS 10.13 */ +#if (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && HAVE_BUILTIN_AVAILABLE == 1 + if(__builtin_available(macOS 10.13, iOS 11.0, *)) { + *darwinver = kTLSProtocol13; + return CURLE_OK; + } +#endif /* (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && + HAVE_BUILTIN_AVAILABLE == 1 */ + break; + } + return CURLE_SSL_CONNECT_ERROR; +} +#endif + +static CURLcode +set_ssl_version_min_max(struct Curl_easy *data, struct connectdata *conn, + int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct ssl_backend_data *backend = connssl->backend; + long ssl_version = SSL_CONN_CONFIG(version); + long ssl_version_max = SSL_CONN_CONFIG(version_max); + long max_supported_version_by_os; + + /* macOS 10.5-10.7 supported TLS 1.0 only. + macOS 10.8 and later, and iOS 5 and later, added TLS 1.1 and 1.2. + macOS 10.13 and later, and iOS 11 and later, added TLS 1.3. */ +#if (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && HAVE_BUILTIN_AVAILABLE == 1 + if(__builtin_available(macOS 10.13, iOS 11.0, *)) { + max_supported_version_by_os = CURL_SSLVERSION_MAX_TLSv1_3; + } + else { + max_supported_version_by_os = CURL_SSLVERSION_MAX_TLSv1_2; + } +#else + max_supported_version_by_os = CURL_SSLVERSION_MAX_TLSv1_2; +#endif /* (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && + HAVE_BUILTIN_AVAILABLE == 1 */ + + switch(ssl_version) { + case CURL_SSLVERSION_DEFAULT: + case CURL_SSLVERSION_TLSv1: + ssl_version = CURL_SSLVERSION_TLSv1_0; + break; + } + + switch(ssl_version_max) { + case CURL_SSLVERSION_MAX_NONE: + case CURL_SSLVERSION_MAX_DEFAULT: + ssl_version_max = max_supported_version_by_os; + break; + } + +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + if(SSLSetProtocolVersionMax) { + SSLProtocol darwin_ver_min = kTLSProtocol1; + SSLProtocol darwin_ver_max = kTLSProtocol1; + CURLcode result = sectransp_version_from_curl(&darwin_ver_min, + ssl_version); + if(result) { + failf(data, "unsupported min version passed via CURLOPT_SSLVERSION"); + return result; + } + result = sectransp_version_from_curl(&darwin_ver_max, + ssl_version_max >> 16); + if(result) { + failf(data, "unsupported max version passed via CURLOPT_SSLVERSION"); + return result; + } + + (void)SSLSetProtocolVersionMin(backend->ssl_ctx, darwin_ver_min); + (void)SSLSetProtocolVersionMax(backend->ssl_ctx, darwin_ver_max); + return result; + } + else { +#if CURL_SUPPORT_MAC_10_8 + long i = ssl_version; + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kSSLProtocolAll, + false); + for(; i <= (ssl_version_max >> 16); i++) { + switch(i) { + case CURL_SSLVERSION_TLSv1_0: + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kTLSProtocol1, + true); + break; + case CURL_SSLVERSION_TLSv1_1: + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kTLSProtocol11, + true); + break; + case CURL_SSLVERSION_TLSv1_2: + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kTLSProtocol12, + true); + break; + case CURL_SSLVERSION_TLSv1_3: + failf(data, "Your version of the OS does not support TLSv1.3"); + return CURLE_SSL_CONNECT_ERROR; + } + } + return CURLE_OK; +#endif /* CURL_SUPPORT_MAC_10_8 */ + } +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ + failf(data, "Secure Transport: cannot set SSL protocol"); + return CURLE_SSL_CONNECT_ERROR; +} + +static bool is_cipher_suite_strong(SSLCipherSuite suite_num) +{ + for(size_t i = 0; i < NUM_OF_CIPHERS; ++i) { + if(ciphertable[i].num == suite_num) { + return !ciphertable[i].weak; + } + } + /* If the cipher is not in our list, assume it is a new one + and therefore strong. Previous implementation was the same, + if cipher suite is not in the list, it was considered strong enough */ + return true; +} + +static bool is_separator(char c) +{ + /* Return whether character is a cipher list separator. */ + switch(c) { + case ' ': + case '\t': + case ':': + case ',': + case ';': + return true; + } + return false; +} + +static CURLcode sectransp_set_default_ciphers(struct Curl_easy *data, + SSLContextRef ssl_ctx) +{ + size_t all_ciphers_count = 0UL, allowed_ciphers_count = 0UL, i; + SSLCipherSuite *all_ciphers = NULL, *allowed_ciphers = NULL; + OSStatus err = noErr; + +#if CURL_BUILD_MAC + int darwinver_maj = 0, darwinver_min = 0; + + GetDarwinVersionNumber(&darwinver_maj, &darwinver_min); +#endif /* CURL_BUILD_MAC */ + + /* Disable cipher suites that ST supports but are not safe. These ciphers + are unlikely to be used in any case since ST gives other ciphers a much + higher priority, but it's probably better that we not connect at all than + to give the user a false sense of security if the server only supports + insecure ciphers. (Note: We don't care about SSLv2-only ciphers.) */ + err = SSLGetNumberSupportedCiphers(ssl_ctx, &all_ciphers_count); + if(err != noErr) { + failf(data, "SSL: SSLGetNumberSupportedCiphers() failed: OSStatus %d", + err); + return CURLE_SSL_CIPHER; + } + all_ciphers = malloc(all_ciphers_count*sizeof(SSLCipherSuite)); + if(!all_ciphers) { + failf(data, "SSL: Failed to allocate memory for all ciphers"); + return CURLE_OUT_OF_MEMORY; + } + allowed_ciphers = malloc(all_ciphers_count*sizeof(SSLCipherSuite)); + if(!allowed_ciphers) { + Curl_safefree(all_ciphers); + failf(data, "SSL: Failed to allocate memory for allowed ciphers"); + return CURLE_OUT_OF_MEMORY; + } + err = SSLGetSupportedCiphers(ssl_ctx, all_ciphers, + &all_ciphers_count); + if(err != noErr) { + Curl_safefree(all_ciphers); + Curl_safefree(allowed_ciphers); + return CURLE_SSL_CIPHER; + } + for(i = 0UL ; i < all_ciphers_count ; i++) { +#if CURL_BUILD_MAC + /* There's a known bug in early versions of Mountain Lion where ST's ECC + ciphers (cipher suite 0xC001 through 0xC032) simply do not work. + Work around the problem here by disabling those ciphers if we are + running in an affected version of OS X. */ + if(darwinver_maj == 12 && darwinver_min <= 3 && + all_ciphers[i] >= 0xC001 && all_ciphers[i] <= 0xC032) { + continue; + } +#endif /* CURL_BUILD_MAC */ + if(is_cipher_suite_strong(all_ciphers[i])) { + allowed_ciphers[allowed_ciphers_count++] = all_ciphers[i]; + } + } + err = SSLSetEnabledCiphers(ssl_ctx, allowed_ciphers, + allowed_ciphers_count); + Curl_safefree(all_ciphers); + Curl_safefree(allowed_ciphers); + if(err != noErr) { + failf(data, "SSL: SSLSetEnabledCiphers() failed: OSStatus %d", err); + return CURLE_SSL_CIPHER; + } + return CURLE_OK; +} + +static CURLcode sectransp_set_selected_ciphers(struct Curl_easy *data, + SSLContextRef ssl_ctx, + const char *ciphers) +{ + size_t ciphers_count = 0; + const char *cipher_start = ciphers; + OSStatus err = noErr; + SSLCipherSuite selected_ciphers[NUM_OF_CIPHERS]; + + if(!ciphers) + return CURLE_OK; + + while(is_separator(*ciphers)) /* Skip initial separators. */ + ciphers++; + if(!*ciphers) + return CURLE_OK; + + cipher_start = ciphers; + while(*cipher_start && ciphers_count < NUM_OF_CIPHERS) { + bool cipher_found = FALSE; + size_t cipher_len = 0; + const char *cipher_end = NULL; + bool tls_name = FALSE; + + /* Skip separators */ + while(is_separator(*cipher_start)) + cipher_start++; + if(*cipher_start == '\0') { + break; + } + /* Find last position of a cipher in the ciphers string */ + cipher_end = cipher_start; + while (*cipher_end != '\0' && !is_separator(*cipher_end)) { + ++cipher_end; + } + + /* IANA cipher names start with the TLS_ or SSL_ prefix. + If the 4th symbol of the cipher is '_' we look for a cipher in the + table by its (TLS) name. + Otherwise, we try to match cipher by an alias. */ + if(cipher_start[3] == '_') { + tls_name = TRUE; + } + /* Iterate through the cipher table and look for the cipher, starting + the cipher number 0x01 because the 0x00 is not the real cipher */ + cipher_len = cipher_end - cipher_start; + for(size_t i = 1; i < NUM_OF_CIPHERS; ++i) { + const char *table_cipher_name = NULL; + if(tls_name) { + table_cipher_name = ciphertable[i].name; + } + else if(ciphertable[i].alias_name) { + table_cipher_name = ciphertable[i].alias_name; + } + else { + continue; + } + /* Compare a part of the string between separators with a cipher name + in the table and make sure we matched the whole cipher name */ + if(strncmp(cipher_start, table_cipher_name, cipher_len) == 0 + && table_cipher_name[cipher_len] == '\0') { + selected_ciphers[ciphers_count] = ciphertable[i].num; + ++ciphers_count; + cipher_found = TRUE; + break; + } + } + if(!cipher_found) { + /* It would be more human-readable if we print the wrong cipher name + but we don't want to allocate any additional memory and copy the name + into it, then add it into logs. + Also, we do not modify an original cipher list string. We just point + to positions where cipher starts and ends in the cipher list string. + The message is a bit cryptic and longer than necessary but can be + understood by humans. */ + failf(data, "SSL: cipher string \"%s\" contains unsupported cipher name" + " starting position %d and ending position %d", + ciphers, + cipher_start - ciphers, + cipher_end - ciphers); + return CURLE_SSL_CIPHER; + } + if(*cipher_end) { + cipher_start = cipher_end + 1; + } + else { + break; + } + } + /* All cipher suites in the list are found. Report to logs as-is */ + infof(data, "SSL: Setting cipher suites list \"%s\"", ciphers); + + err = SSLSetEnabledCiphers(ssl_ctx, selected_ciphers, ciphers_count); + if(err != noErr) { + failf(data, "SSL: SSLSetEnabledCiphers() failed: OSStatus %d", err); + return CURLE_SSL_CIPHER; + } + return CURLE_OK; +} + +static CURLcode sectransp_connect_step1(struct Curl_easy *data, + struct connectdata *conn, + int sockindex) +{ + curl_socket_t sockfd = conn->sock[sockindex]; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct ssl_backend_data *backend = connssl->backend; + const struct curl_blob *ssl_cablob = SSL_CONN_CONFIG(ca_info_blob); + const char * const ssl_cafile = + /* CURLOPT_CAINFO_BLOB overrides CURLOPT_CAINFO */ + (ssl_cablob ? NULL : SSL_CONN_CONFIG(CAfile)); + const bool verifypeer = SSL_CONN_CONFIG(verifypeer); + char * const ssl_cert = SSL_SET_OPTION(primary.clientcert); + const struct curl_blob *ssl_cert_blob = SSL_SET_OPTION(primary.cert_blob); + bool isproxy = SSL_IS_PROXY(); + const char * const hostname = SSL_HOST_NAME(); + const long int port = SSL_HOST_PORT(); +#ifdef ENABLE_IPV6 + struct in6_addr addr; +#else + struct in_addr addr; +#endif /* ENABLE_IPV6 */ + char *ciphers; + OSStatus err = noErr; +#if CURL_BUILD_MAC + int darwinver_maj = 0, darwinver_min = 0; + + GetDarwinVersionNumber(&darwinver_maj, &darwinver_min); +#endif /* CURL_BUILD_MAC */ + +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + if(SSLCreateContext) { /* use the newer API if available */ + if(backend->ssl_ctx) + CFRelease(backend->ssl_ctx); + backend->ssl_ctx = SSLCreateContext(NULL, kSSLClientSide, kSSLStreamType); + if(!backend->ssl_ctx) { + failf(data, "SSL: couldn't create a context!"); + return CURLE_OUT_OF_MEMORY; + } + } + else { + /* The old ST API does not exist under iOS, so don't compile it: */ +#if CURL_SUPPORT_MAC_10_8 + if(backend->ssl_ctx) + (void)SSLDisposeContext(backend->ssl_ctx); + err = SSLNewContext(false, &(backend->ssl_ctx)); + if(err != noErr) { + failf(data, "SSL: couldn't create a context: OSStatus %d", err); + return CURLE_OUT_OF_MEMORY; + } +#endif /* CURL_SUPPORT_MAC_10_8 */ + } +#else + if(backend->ssl_ctx) + (void)SSLDisposeContext(backend->ssl_ctx); + err = SSLNewContext(false, &(backend->ssl_ctx)); + if(err != noErr) { + failf(data, "SSL: couldn't create a context: OSStatus %d", err); + return CURLE_OUT_OF_MEMORY; + } +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ + backend->ssl_write_buffered_length = 0UL; /* reset buffered write length */ + + /* check to see if we've been told to use an explicit SSL/TLS version */ +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + if(SSLSetProtocolVersionMax) { + switch(conn->ssl_config.version) { + case CURL_SSLVERSION_TLSv1: + (void)SSLSetProtocolVersionMin(backend->ssl_ctx, kTLSProtocol1); +#if (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && HAVE_BUILTIN_AVAILABLE == 1 + if(__builtin_available(macOS 10.13, iOS 11.0, *)) { + (void)SSLSetProtocolVersionMax(backend->ssl_ctx, kTLSProtocol13); + } + else { + (void)SSLSetProtocolVersionMax(backend->ssl_ctx, kTLSProtocol12); + } +#else + (void)SSLSetProtocolVersionMax(backend->ssl_ctx, kTLSProtocol12); +#endif /* (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && + HAVE_BUILTIN_AVAILABLE == 1 */ + break; + case CURL_SSLVERSION_DEFAULT: + case CURL_SSLVERSION_TLSv1_0: + case CURL_SSLVERSION_TLSv1_1: + case CURL_SSLVERSION_TLSv1_2: + case CURL_SSLVERSION_TLSv1_3: + { + CURLcode result = set_ssl_version_min_max(data, conn, sockindex); + if(result != CURLE_OK) + return result; + break; + } + case CURL_SSLVERSION_SSLv3: + case CURL_SSLVERSION_SSLv2: + failf(data, "SSL versions not supported"); + return CURLE_NOT_BUILT_IN; + default: + failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION"); + return CURLE_SSL_CONNECT_ERROR; + } + } + else { +#if CURL_SUPPORT_MAC_10_8 + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kSSLProtocolAll, + false); + switch(conn->ssl_config.version) { + case CURL_SSLVERSION_DEFAULT: + case CURL_SSLVERSION_TLSv1: + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kTLSProtocol1, + true); + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kTLSProtocol11, + true); + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kTLSProtocol12, + true); + break; + case CURL_SSLVERSION_TLSv1_0: + case CURL_SSLVERSION_TLSv1_1: + case CURL_SSLVERSION_TLSv1_2: + case CURL_SSLVERSION_TLSv1_3: + { + CURLcode result = set_ssl_version_min_max(data, conn, sockindex); + if(result != CURLE_OK) + return result; + break; + } + case CURL_SSLVERSION_SSLv3: + case CURL_SSLVERSION_SSLv2: + failf(data, "SSL versions not supported"); + return CURLE_NOT_BUILT_IN; + default: + failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION"); + return CURLE_SSL_CONNECT_ERROR; + } +#endif /* CURL_SUPPORT_MAC_10_8 */ + } +#else + if(conn->ssl_config.version_max != CURL_SSLVERSION_MAX_NONE) { + failf(data, "Your version of the OS does not support to set maximum" + " SSL/TLS version"); + return CURLE_SSL_CONNECT_ERROR; + } + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, kSSLProtocolAll, false); + switch(conn->ssl_config.version) { + case CURL_SSLVERSION_DEFAULT: + case CURL_SSLVERSION_TLSv1: + case CURL_SSLVERSION_TLSv1_0: + (void)SSLSetProtocolVersionEnabled(backend->ssl_ctx, + kTLSProtocol1, + true); + break; + case CURL_SSLVERSION_TLSv1_1: + failf(data, "Your version of the OS does not support TLSv1.1"); + return CURLE_SSL_CONNECT_ERROR; + case CURL_SSLVERSION_TLSv1_2: + failf(data, "Your version of the OS does not support TLSv1.2"); + return CURLE_SSL_CONNECT_ERROR; + case CURL_SSLVERSION_TLSv1_3: + failf(data, "Your version of the OS does not support TLSv1.3"); + return CURLE_SSL_CONNECT_ERROR; + case CURL_SSLVERSION_SSLv2: + case CURL_SSLVERSION_SSLv3: + failf(data, "SSL versions not supported"); + return CURLE_NOT_BUILT_IN; + default: + failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION"); + return CURLE_SSL_CONNECT_ERROR; + } +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ + +#if (CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && HAVE_BUILTIN_AVAILABLE == 1 + if(conn->bits.tls_enable_alpn) { + if(__builtin_available(macOS 10.13.4, iOS 11, tvOS 11, *)) { + CFMutableArrayRef alpnArr = CFArrayCreateMutable(NULL, 0, + &kCFTypeArrayCallBacks); + +#ifdef USE_HTTP2 + if(data->state.httpwant >= CURL_HTTP_VERSION_2 +#ifndef CURL_DISABLE_PROXY + && (!isproxy || !conn->bits.tunnel_proxy) +#endif + ) { + CFArrayAppendValue(alpnArr, CFSTR(ALPN_H2)); + infof(data, "ALPN, offering %s", ALPN_H2); + } +#endif + + CFArrayAppendValue(alpnArr, CFSTR(ALPN_HTTP_1_1)); + infof(data, "ALPN, offering %s", ALPN_HTTP_1_1); + + /* expects length prefixed preference ordered list of protocols in wire + * format + */ + err = SSLSetALPNProtocols(backend->ssl_ctx, alpnArr); + if(err != noErr) + infof(data, "WARNING: failed to set ALPN protocols; OSStatus %d", + err); + CFRelease(alpnArr); + } + } +#endif + + if(SSL_SET_OPTION(key)) { + infof(data, "WARNING: SSL: CURLOPT_SSLKEY is ignored by Secure " + "Transport. The private key must be in the Keychain."); + } + + if(ssl_cert || ssl_cert_blob) { + bool is_cert_data = ssl_cert_blob != NULL; + bool is_cert_file = (!is_cert_data) && is_file(ssl_cert); + SecIdentityRef cert_and_key = NULL; + + /* User wants to authenticate with a client cert. Look for it. Assume that + the user wants to use an identity loaded from the Keychain. If not, try + it as a file on disk */ + + if(!is_cert_data) + err = CopyIdentityWithLabel(ssl_cert, &cert_and_key); + else + err = !noErr; + if((err != noErr) && (is_cert_file || is_cert_data)) { + if(!SSL_SET_OPTION(cert_type)) + infof(data, "SSL: Certificate type not set, assuming " + "PKCS#12 format."); + else if(!strcasecompare(SSL_SET_OPTION(cert_type), "P12")) { + failf(data, "SSL: The Security framework only supports " + "loading identities that are in PKCS#12 format."); + return CURLE_SSL_CERTPROBLEM; + } + + err = CopyIdentityFromPKCS12File(ssl_cert, ssl_cert_blob, + SSL_SET_OPTION(key_passwd), + &cert_and_key); + } + + if(err == noErr && cert_and_key) { + SecCertificateRef cert = NULL; + CFTypeRef certs_c[1]; + CFArrayRef certs; + + /* If we found one, print it out: */ + err = SecIdentityCopyCertificate(cert_and_key, &cert); + if(err == noErr) { + char *certp; + CURLcode result = CopyCertSubject(data, cert, &certp); + if(!result) { + infof(data, "Client certificate: %s", certp); + free(certp); + } + + CFRelease(cert); + if(result == CURLE_PEER_FAILED_VERIFICATION) + return CURLE_SSL_CERTPROBLEM; + if(result) + return result; + } + certs_c[0] = cert_and_key; + certs = CFArrayCreate(NULL, (const void **)certs_c, 1L, + &kCFTypeArrayCallBacks); + err = SSLSetCertificate(backend->ssl_ctx, certs); + if(certs) + CFRelease(certs); + if(err != noErr) { + failf(data, "SSL: SSLSetCertificate() failed: OSStatus %d", err); + return CURLE_SSL_CERTPROBLEM; + } + CFRelease(cert_and_key); + } + else { + const char *cert_showfilename_error = + is_cert_data ? "(memory blob)" : ssl_cert; + + switch(err) { + case errSecAuthFailed: case -25264: /* errSecPkcs12VerifyFailure */ + failf(data, "SSL: Incorrect password for the certificate \"%s\" " + "and its private key.", cert_showfilename_error); + break; + case -26275: /* errSecDecode */ case -25257: /* errSecUnknownFormat */ + failf(data, "SSL: Couldn't make sense of the data in the " + "certificate \"%s\" and its private key.", + cert_showfilename_error); + break; + case -25260: /* errSecPassphraseRequired */ + failf(data, "SSL The certificate \"%s\" requires a password.", + cert_showfilename_error); + break; + case errSecItemNotFound: + failf(data, "SSL: Can't find the certificate \"%s\" and its private " + "key in the Keychain.", cert_showfilename_error); + break; + default: + failf(data, "SSL: Can't load the certificate \"%s\" and its private " + "key: OSStatus %d", cert_showfilename_error, err); + break; + } + return CURLE_SSL_CERTPROBLEM; + } + } + + /* SSL always tries to verify the peer, this only says whether it should + * fail to connect if the verification fails, or if it should continue + * anyway. In the latter case the result of the verification is checked with + * SSL_get_verify_result() below. */ +#if CURL_BUILD_MAC_10_6 || CURL_BUILD_IOS + /* Snow Leopard introduced the SSLSetSessionOption() function, but due to + a library bug with the way the kSSLSessionOptionBreakOnServerAuth flag + works, it doesn't work as expected under Snow Leopard, Lion or + Mountain Lion. + So we need to call SSLSetEnableCertVerify() on those older cats in order + to disable certificate validation if the user turned that off. + (SecureTransport will always validate the certificate chain by + default.) + Note: + Darwin 11.x.x is Lion (10.7) + Darwin 12.x.x is Mountain Lion (10.8) + Darwin 13.x.x is Mavericks (10.9) + Darwin 14.x.x is Yosemite (10.10) + Darwin 15.x.x is El Capitan (10.11) + */ +#if CURL_BUILD_MAC + if(SSLSetSessionOption && darwinver_maj >= 13) { +#else + if(SSLSetSessionOption) { +#endif /* CURL_BUILD_MAC */ + bool break_on_auth = !conn->ssl_config.verifypeer || + ssl_cafile || ssl_cablob; + err = SSLSetSessionOption(backend->ssl_ctx, + kSSLSessionOptionBreakOnServerAuth, + break_on_auth); + if(err != noErr) { + failf(data, "SSL: SSLSetSessionOption() failed: OSStatus %d", err); + return CURLE_SSL_CONNECT_ERROR; + } + } + else { +#if CURL_SUPPORT_MAC_10_8 + err = SSLSetEnableCertVerify(backend->ssl_ctx, + conn->ssl_config.verifypeer?true:false); + if(err != noErr) { + failf(data, "SSL: SSLSetEnableCertVerify() failed: OSStatus %d", err); + return CURLE_SSL_CONNECT_ERROR; + } +#endif /* CURL_SUPPORT_MAC_10_8 */ + } +#else + err = SSLSetEnableCertVerify(backend->ssl_ctx, + conn->ssl_config.verifypeer?true:false); + if(err != noErr) { + failf(data, "SSL: SSLSetEnableCertVerify() failed: OSStatus %d", err); + return CURLE_SSL_CONNECT_ERROR; + } +#endif /* CURL_BUILD_MAC_10_6 || CURL_BUILD_IOS */ + + if((ssl_cafile || ssl_cablob) && verifypeer) { + bool is_cert_data = ssl_cablob != NULL; + bool is_cert_file = (!is_cert_data) && is_file(ssl_cafile); + + if(!(is_cert_file || is_cert_data)) { + failf(data, "SSL: can't load CA certificate file %s", + ssl_cafile ? ssl_cafile : "(blob memory)"); + return CURLE_SSL_CACERT_BADFILE; + } + } + + /* Configure hostname check. SNI is used if available. + * Both hostname check and SNI require SSLSetPeerDomainName(). + * Also: the verifyhost setting influences SNI usage */ + if(conn->ssl_config.verifyhost) { + err = SSLSetPeerDomainName(backend->ssl_ctx, hostname, + strlen(hostname)); + + if(err != noErr) { + infof(data, "WARNING: SSL: SSLSetPeerDomainName() failed: OSStatus %d", + err); + } + + if((Curl_inet_pton(AF_INET, hostname, &addr)) + #ifdef ENABLE_IPV6 + || (Curl_inet_pton(AF_INET6, hostname, &addr)) + #endif + ) { + infof(data, "WARNING: using IP address, SNI is being disabled by " + "the OS."); + } + } + else { + infof(data, "WARNING: disabling hostname validation also disables SNI."); + } + + ciphers = SSL_CONN_CONFIG(cipher_list); + if(ciphers) { + err = sectransp_set_selected_ciphers(data, backend->ssl_ctx, ciphers); + } + else { + err = sectransp_set_default_ciphers(data, backend->ssl_ctx); + } + if(err != noErr) { + failf(data, "SSL: Unable to set ciphers for SSL/TLS handshake. " + "Error code: %d", err); + return CURLE_SSL_CIPHER; + } + +#if CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 + /* We want to enable 1/n-1 when using a CBC cipher unless the user + specifically doesn't want us doing that: */ + if(SSLSetSessionOption) { + SSLSetSessionOption(backend->ssl_ctx, kSSLSessionOptionSendOneByteRecord, + !SSL_SET_OPTION(enable_beast)); + SSLSetSessionOption(backend->ssl_ctx, kSSLSessionOptionFalseStart, + data->set.ssl.falsestart); /* false start support */ + } +#endif /* CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 */ + + /* Check if there's a cached ID we can/should use here! */ + if(SSL_SET_OPTION(primary.sessionid)) { + char *ssl_sessionid; + size_t ssl_sessionid_len; + + Curl_ssl_sessionid_lock(data); + if(!Curl_ssl_getsessionid(data, conn, isproxy, (void **)&ssl_sessionid, + &ssl_sessionid_len, sockindex)) { + /* we got a session id, use it! */ + err = SSLSetPeerID(backend->ssl_ctx, ssl_sessionid, ssl_sessionid_len); + Curl_ssl_sessionid_unlock(data); + if(err != noErr) { + failf(data, "SSL: SSLSetPeerID() failed: OSStatus %d", err); + return CURLE_SSL_CONNECT_ERROR; + } + /* Informational message */ + infof(data, "SSL re-using session ID"); + } + /* If there isn't one, then let's make one up! This has to be done prior + to starting the handshake. */ + else { + CURLcode result; + ssl_sessionid = + aprintf("%s:%d:%d:%s:%ld", + ssl_cafile ? ssl_cafile : "(blob memory)", + verifypeer, SSL_CONN_CONFIG(verifyhost), hostname, port); + ssl_sessionid_len = strlen(ssl_sessionid); + + err = SSLSetPeerID(backend->ssl_ctx, ssl_sessionid, ssl_sessionid_len); + if(err != noErr) { + Curl_ssl_sessionid_unlock(data); + failf(data, "SSL: SSLSetPeerID() failed: OSStatus %d", err); + return CURLE_SSL_CONNECT_ERROR; + } + + result = Curl_ssl_addsessionid(data, conn, isproxy, ssl_sessionid, + ssl_sessionid_len, sockindex, NULL); + Curl_ssl_sessionid_unlock(data); + if(result) { + failf(data, "failed to store ssl session"); + return result; + } + } + } + + err = SSLSetIOFuncs(backend->ssl_ctx, SocketRead, SocketWrite); + if(err != noErr) { + failf(data, "SSL: SSLSetIOFuncs() failed: OSStatus %d", err); + return CURLE_SSL_CONNECT_ERROR; + } + + /* pass the raw socket into the SSL layers */ + /* We need to store the FD in a constant memory address, because + * SSLSetConnection() will not copy that address. I've found that + * conn->sock[sockindex] may change on its own. */ + backend->ssl_sockfd = sockfd; + err = SSLSetConnection(backend->ssl_ctx, connssl); + if(err != noErr) { + failf(data, "SSL: SSLSetConnection() failed: %d", err); + return CURLE_SSL_CONNECT_ERROR; + } + + connssl->connecting_state = ssl_connect_2; + return CURLE_OK; +} + +static long pem_to_der(const char *in, unsigned char **out, size_t *outlen) +{ + char *sep_start, *sep_end, *cert_start, *cert_end; + size_t i, j, err; + size_t len; + unsigned char *b64; + + /* Jump through the separators at the beginning of the certificate. */ + sep_start = strstr(in, "-----"); + if(!sep_start) + return 0; + cert_start = strstr(sep_start + 1, "-----"); + if(!cert_start) + return -1; + + cert_start += 5; + + /* Find separator after the end of the certificate. */ + cert_end = strstr(cert_start, "-----"); + if(!cert_end) + return -1; + + sep_end = strstr(cert_end + 1, "-----"); + if(!sep_end) + return -1; + sep_end += 5; + + len = cert_end - cert_start; + b64 = malloc(len + 1); + if(!b64) + return -1; + + /* Create base64 string without linefeeds. */ + for(i = 0, j = 0; i < len; i++) { + if(cert_start[i] != '\r' && cert_start[i] != '\n') + b64[j++] = cert_start[i]; + } + b64[j] = '\0'; + + err = Curl_base64_decode((const char *)b64, out, outlen); + free(b64); + if(err) { + free(*out); + return -1; + } + + return sep_end - in; +} + +static int read_cert(const char *file, unsigned char **out, size_t *outlen) +{ + int fd; + ssize_t n, len = 0, cap = 512; + unsigned char buf[512], *data; + + fd = open(file, 0); + if(fd < 0) + return -1; + + data = malloc(cap); + if(!data) { + close(fd); + return -1; + } + + for(;;) { + n = read(fd, buf, sizeof(buf)); + if(n < 0) { + close(fd); + free(data); + return -1; + } + else if(n == 0) { + close(fd); + break; + } + + if(len + n >= cap) { + cap *= 2; + data = Curl_saferealloc(data, cap); + if(!data) { + close(fd); + return -1; + } + } + + memcpy(data + len, buf, n); + len += n; + } + data[len] = '\0'; + + *out = data; + *outlen = len; + + return 0; +} + +static int append_cert_to_array(struct Curl_easy *data, + const unsigned char *buf, size_t buflen, + CFMutableArrayRef array) +{ + CFDataRef certdata = CFDataCreate(kCFAllocatorDefault, buf, buflen); + char *certp; + CURLcode result; + if(!certdata) { + failf(data, "SSL: failed to allocate array for CA certificate"); + return CURLE_OUT_OF_MEMORY; + } + + SecCertificateRef cacert = + SecCertificateCreateWithData(kCFAllocatorDefault, certdata); + CFRelease(certdata); + if(!cacert) { + failf(data, "SSL: failed to create SecCertificate from CA certificate"); + return CURLE_SSL_CACERT_BADFILE; + } + + /* Check if cacert is valid. */ + result = CopyCertSubject(data, cacert, &certp); + switch(result) { + case CURLE_OK: + break; + case CURLE_PEER_FAILED_VERIFICATION: + return CURLE_SSL_CACERT_BADFILE; + case CURLE_OUT_OF_MEMORY: + default: + return result; + } + free(certp); + + CFArrayAppendValue(array, cacert); + CFRelease(cacert); + + return CURLE_OK; +} + +static CURLcode verify_cert_buf(struct Curl_easy *data, + const unsigned char *certbuf, size_t buflen, + SSLContextRef ctx) +{ + int n = 0, rc; + long res; + unsigned char *der; + size_t derlen, offset = 0; + + /* + * Certbuf now contains the contents of the certificate file, which can be + * - a single DER certificate, + * - a single PEM certificate or + * - a bunch of PEM certificates (certificate bundle). + * + * Go through certbuf, and convert any PEM certificate in it into DER + * format. + */ + CFMutableArrayRef array = CFArrayCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeArrayCallBacks); + if(!array) { + failf(data, "SSL: out of memory creating CA certificate array"); + return CURLE_OUT_OF_MEMORY; + } + + while(offset < buflen) { + n++; + + /* + * Check if the certificate is in PEM format, and convert it to DER. If + * this fails, we assume the certificate is in DER format. + */ + res = pem_to_der((const char *)certbuf + offset, &der, &derlen); + if(res < 0) { + CFRelease(array); + failf(data, "SSL: invalid CA certificate #%d (offset %zu) in bundle", + n, offset); + return CURLE_SSL_CACERT_BADFILE; + } + offset += res; + + if(res == 0 && offset == 0) { + /* This is not a PEM file, probably a certificate in DER format. */ + rc = append_cert_to_array(data, certbuf, buflen, array); + if(rc != CURLE_OK) { + CFRelease(array); + return rc; + } + break; + } + else if(res == 0) { + /* No more certificates in the bundle. */ + break; + } + + rc = append_cert_to_array(data, der, derlen, array); + free(der); + if(rc != CURLE_OK) { + CFRelease(array); + return rc; + } + } + + SecTrustRef trust; + OSStatus ret = SSLCopyPeerTrust(ctx, &trust); + if(!trust) { + failf(data, "SSL: error getting certificate chain"); + CFRelease(array); + return CURLE_PEER_FAILED_VERIFICATION; + } + else if(ret != noErr) { + CFRelease(array); + failf(data, "SSLCopyPeerTrust() returned error %d", ret); + return CURLE_PEER_FAILED_VERIFICATION; + } + + ret = SecTrustSetAnchorCertificates(trust, array); + if(ret != noErr) { + CFRelease(array); + CFRelease(trust); + failf(data, "SecTrustSetAnchorCertificates() returned error %d", ret); + return CURLE_PEER_FAILED_VERIFICATION; + } + ret = SecTrustSetAnchorCertificatesOnly(trust, true); + if(ret != noErr) { + CFRelease(array); + CFRelease(trust); + failf(data, "SecTrustSetAnchorCertificatesOnly() returned error %d", ret); + return CURLE_PEER_FAILED_VERIFICATION; + } + + SecTrustResultType trust_eval = 0; + ret = SecTrustEvaluate(trust, &trust_eval); + CFRelease(array); + CFRelease(trust); + if(ret != noErr) { + failf(data, "SecTrustEvaluate() returned error %d", ret); + return CURLE_PEER_FAILED_VERIFICATION; + } + + switch(trust_eval) { + case kSecTrustResultUnspecified: + case kSecTrustResultProceed: + return CURLE_OK; + + case kSecTrustResultRecoverableTrustFailure: + case kSecTrustResultDeny: + default: + failf(data, "SSL: certificate verification failed (result: %d)", + trust_eval); + return CURLE_PEER_FAILED_VERIFICATION; + } +} + +static CURLcode verify_cert(struct Curl_easy *data, const char *cafile, + const struct curl_blob *ca_info_blob, + SSLContextRef ctx) +{ + int result; + unsigned char *certbuf; + size_t buflen; + + if(ca_info_blob) { + certbuf = (unsigned char *)malloc(ca_info_blob->len + 1); + if(!certbuf) { + return CURLE_OUT_OF_MEMORY; + } + buflen = ca_info_blob->len; + memcpy(certbuf, ca_info_blob->data, ca_info_blob->len); + certbuf[ca_info_blob->len]='\0'; + } + else if(cafile) { + if(read_cert(cafile, &certbuf, &buflen) < 0) { + failf(data, "SSL: failed to read or invalid CA certificate"); + return CURLE_SSL_CACERT_BADFILE; + } + } + else + return CURLE_SSL_CACERT_BADFILE; + + result = verify_cert_buf(data, certbuf, buflen, ctx); + free(certbuf); + return result; +} + + +#ifdef SECTRANSP_PINNEDPUBKEY +static CURLcode pkp_pin_peer_pubkey(struct Curl_easy *data, + SSLContextRef ctx, + const char *pinnedpubkey) +{ /* Scratch */ + size_t pubkeylen, realpubkeylen, spkiHeaderLength = 24; + unsigned char *pubkey = NULL, *realpubkey = NULL; + const unsigned char *spkiHeader = NULL; + CFDataRef publicKeyBits = NULL; + + /* Result is returned to caller */ + CURLcode result = CURLE_SSL_PINNEDPUBKEYNOTMATCH; + + /* if a path wasn't specified, don't pin */ + if(!pinnedpubkey) + return CURLE_OK; + + + if(!ctx) + return result; + + do { + SecTrustRef trust; + OSStatus ret = SSLCopyPeerTrust(ctx, &trust); + if(ret != noErr || !trust) + break; + + SecKeyRef keyRef = SecTrustCopyPublicKey(trust); + CFRelease(trust); + if(!keyRef) + break; + +#ifdef SECTRANSP_PINNEDPUBKEY_V1 + + publicKeyBits = SecKeyCopyExternalRepresentation(keyRef, NULL); + CFRelease(keyRef); + if(!publicKeyBits) + break; + +#elif SECTRANSP_PINNEDPUBKEY_V2 + + OSStatus success = SecItemExport(keyRef, kSecFormatOpenSSL, 0, NULL, + &publicKeyBits); + CFRelease(keyRef); + if(success != errSecSuccess || !publicKeyBits) + break; + +#endif /* SECTRANSP_PINNEDPUBKEY_V2 */ + + pubkeylen = CFDataGetLength(publicKeyBits); + pubkey = (unsigned char *)CFDataGetBytePtr(publicKeyBits); + + switch(pubkeylen) { + case 526: + /* 4096 bit RSA pubkeylen == 526 */ + spkiHeader = rsa4096SpkiHeader; + break; + case 270: + /* 2048 bit RSA pubkeylen == 270 */ + spkiHeader = rsa2048SpkiHeader; + break; +#ifdef SECTRANSP_PINNEDPUBKEY_V1 + case 65: + /* ecDSA secp256r1 pubkeylen == 65 */ + spkiHeader = ecDsaSecp256r1SpkiHeader; + spkiHeaderLength = 26; + break; + case 97: + /* ecDSA secp384r1 pubkeylen == 97 */ + spkiHeader = ecDsaSecp384r1SpkiHeader; + spkiHeaderLength = 23; + break; + default: + infof(data, "SSL: unhandled public key length: %d", pubkeylen); +#elif SECTRANSP_PINNEDPUBKEY_V2 + default: + /* ecDSA secp256r1 pubkeylen == 91 header already included? + * ecDSA secp384r1 header already included too + * we assume rest of algorithms do same, so do nothing + */ + result = Curl_pin_peer_pubkey(data, pinnedpubkey, pubkey, + pubkeylen); +#endif /* SECTRANSP_PINNEDPUBKEY_V2 */ + continue; /* break from loop */ + } + + realpubkeylen = pubkeylen + spkiHeaderLength; + realpubkey = malloc(realpubkeylen); + if(!realpubkey) + break; + + memcpy(realpubkey, spkiHeader, spkiHeaderLength); + memcpy(realpubkey + spkiHeaderLength, pubkey, pubkeylen); + + result = Curl_pin_peer_pubkey(data, pinnedpubkey, realpubkey, + realpubkeylen); + + } while(0); + + Curl_safefree(realpubkey); + if(publicKeyBits) + CFRelease(publicKeyBits); + + return result; +} +#endif /* SECTRANSP_PINNEDPUBKEY */ + +static CURLcode +sectransp_connect_step2(struct Curl_easy *data, struct connectdata *conn, + int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct ssl_backend_data *backend = connssl->backend; + OSStatus err; + SSLCipherSuite cipher; + SSLProtocol protocol = 0; + const char * const hostname = SSL_HOST_NAME(); + + DEBUGASSERT(ssl_connect_2 == connssl->connecting_state + || ssl_connect_2_reading == connssl->connecting_state + || ssl_connect_2_writing == connssl->connecting_state); + + /* Here goes nothing: */ + err = SSLHandshake(backend->ssl_ctx); + + if(err != noErr) { + switch(err) { + case errSSLWouldBlock: /* they're not done with us yet */ + connssl->connecting_state = backend->ssl_direction ? + ssl_connect_2_writing : ssl_connect_2_reading; + return CURLE_OK; + + /* The below is errSSLServerAuthCompleted; it's not defined in + Leopard's headers */ + case -9841: + if((SSL_CONN_CONFIG(CAfile) || SSL_CONN_CONFIG(ca_info_blob)) && + SSL_CONN_CONFIG(verifypeer)) { + CURLcode result = verify_cert(data, SSL_CONN_CONFIG(CAfile), + SSL_CONN_CONFIG(ca_info_blob), + backend->ssl_ctx); + if(result) + return result; + } + /* the documentation says we need to call SSLHandshake() again */ + return sectransp_connect_step2(data, conn, sockindex); + + /* Problem with encrypt / decrypt */ + case errSSLPeerDecodeError: + failf(data, "Decode failed"); + break; + case errSSLDecryptionFail: + case errSSLPeerDecryptionFail: + failf(data, "Decryption failed"); + break; + case errSSLPeerDecryptError: + failf(data, "A decryption error occurred"); + break; + case errSSLBadCipherSuite: + failf(data, "A bad SSL cipher suite was encountered"); + break; + case errSSLCrypto: + failf(data, "An underlying cryptographic error was encountered"); + break; +#if CURL_BUILD_MAC_10_11 || CURL_BUILD_IOS_9 + case errSSLWeakPeerEphemeralDHKey: + failf(data, "Indicates a weak ephemeral Diffie-Hellman key"); + break; +#endif + + /* Problem with the message record validation */ + case errSSLBadRecordMac: + case errSSLPeerBadRecordMac: + failf(data, "A record with a bad message authentication code (MAC) " + "was encountered"); + break; + case errSSLRecordOverflow: + case errSSLPeerRecordOverflow: + failf(data, "A record overflow occurred"); + break; + + /* Problem with zlib decompression */ + case errSSLPeerDecompressFail: + failf(data, "Decompression failed"); + break; + + /* Problem with access */ + case errSSLPeerAccessDenied: + failf(data, "Access was denied"); + break; + case errSSLPeerInsufficientSecurity: + failf(data, "There is insufficient security for this operation"); + break; + + /* These are all certificate problems with the server: */ + case errSSLXCertChainInvalid: + failf(data, "SSL certificate problem: Invalid certificate chain"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLUnknownRootCert: + failf(data, "SSL certificate problem: Untrusted root certificate"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLNoRootCert: + failf(data, "SSL certificate problem: No root certificate"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLCertNotYetValid: + failf(data, "SSL certificate problem: The certificate chain had a " + "certificate that is not yet valid"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLCertExpired: + case errSSLPeerCertExpired: + failf(data, "SSL certificate problem: Certificate chain had an " + "expired certificate"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLBadCert: + case errSSLPeerBadCert: + failf(data, "SSL certificate problem: Couldn't understand the server " + "certificate format"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLPeerUnsupportedCert: + failf(data, "SSL certificate problem: An unsupported certificate " + "format was encountered"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLPeerCertRevoked: + failf(data, "SSL certificate problem: The certificate was revoked"); + return CURLE_PEER_FAILED_VERIFICATION; + case errSSLPeerCertUnknown: + failf(data, "SSL certificate problem: The certificate is unknown"); + return CURLE_PEER_FAILED_VERIFICATION; + + /* These are all certificate problems with the client: */ + case errSecAuthFailed: + failf(data, "SSL authentication failed"); + break; + case errSSLPeerHandshakeFail: + failf(data, "SSL peer handshake failed, the server most likely " + "requires a client certificate to connect"); + break; + case errSSLPeerUnknownCA: + failf(data, "SSL server rejected the client certificate due to " + "the certificate being signed by an unknown certificate " + "authority"); + break; + + /* This error is raised if the server's cert didn't match the server's + host name: */ + case errSSLHostNameMismatch: + failf(data, "SSL certificate peer verification failed, the " + "certificate did not match \"%s\"\n", conn->host.dispname); + return CURLE_PEER_FAILED_VERIFICATION; + + /* Problem with SSL / TLS negotiation */ + case errSSLNegotiation: + failf(data, "Could not negotiate an SSL cipher suite with the server"); + break; + case errSSLBadConfiguration: + failf(data, "A configuration error occurred"); + break; + case errSSLProtocol: + failf(data, "SSL protocol error"); + break; + case errSSLPeerProtocolVersion: + failf(data, "A bad protocol version was encountered"); + break; + case errSSLPeerNoRenegotiation: + failf(data, "No renegotiation is allowed"); + break; + + /* Generic handshake errors: */ + case errSSLConnectionRefused: + failf(data, "Server dropped the connection during the SSL handshake"); + break; + case errSSLClosedAbort: + failf(data, "Server aborted the SSL handshake"); + break; + case errSSLClosedGraceful: + failf(data, "The connection closed gracefully"); + break; + case errSSLClosedNoNotify: + failf(data, "The server closed the session with no notification"); + break; + /* Sometimes paramErr happens with buggy ciphers: */ + case paramErr: + case errSSLInternal: + case errSSLPeerInternalError: + failf(data, "Internal SSL engine error encountered during the " + "SSL handshake"); + break; + case errSSLFatalAlert: + failf(data, "Fatal SSL engine error encountered during the SSL " + "handshake"); + break; + /* Unclassified error */ + case errSSLBufferOverflow: + failf(data, "An insufficient buffer was provided"); + break; + case errSSLIllegalParam: + failf(data, "An illegal parameter was encountered"); + break; + case errSSLModuleAttach: + failf(data, "Module attach failure"); + break; + case errSSLSessionNotFound: + failf(data, "An attempt to restore an unknown session failed"); + break; + case errSSLPeerExportRestriction: + failf(data, "An export restriction occurred"); + break; + case errSSLPeerUserCancelled: + failf(data, "The user canceled the operation"); + break; + case errSSLPeerUnexpectedMsg: + failf(data, "Peer rejected unexpected message"); + break; +#if CURL_BUILD_MAC_10_11 || CURL_BUILD_IOS_9 + /* Treaing non-fatal error as fatal like before */ + case errSSLClientHelloReceived: + failf(data, "A non-fatal result for providing a server name " + "indication"); + break; +#endif + + /* Error codes defined in the enum but should never be returned. + We list them here just in case. */ +#if CURL_BUILD_MAC_10_6 + /* Only returned when kSSLSessionOptionBreakOnCertRequested is set */ + case errSSLClientCertRequested: + failf(data, "Server requested a client certificate during the " + "handshake"); + return CURLE_SSL_CLIENTCERT; +#endif +#if CURL_BUILD_MAC_10_9 + /* Alias for errSSLLast, end of error range */ + case errSSLUnexpectedRecord: + failf(data, "Unexpected (skipped) record in DTLS"); + break; +#endif + default: + /* May also return codes listed in Security Framework Result Codes */ + failf(data, "Unknown SSL protocol error in connection to %s:%d", + hostname, err); + break; + } + return CURLE_SSL_CONNECT_ERROR; + } + else { + /* we have been connected fine, we're not waiting for anything else. */ + connssl->connecting_state = ssl_connect_3; + +#ifdef SECTRANSP_PINNEDPUBKEY + if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) { + CURLcode result = + pkp_pin_peer_pubkey(data, backend->ssl_ctx, + data->set.str[STRING_SSL_PINNEDPUBLICKEY]); + if(result) { + failf(data, "SSL: public key does not match pinned public key!"); + return result; + } + } +#endif /* SECTRANSP_PINNEDPUBKEY */ + + /* Informational message */ + (void)SSLGetNegotiatedCipher(backend->ssl_ctx, &cipher); + (void)SSLGetNegotiatedProtocolVersion(backend->ssl_ctx, &protocol); + switch(protocol) { + case kSSLProtocol2: + infof(data, "SSL 2.0 connection using %s", + TLSCipherNameForNumber(cipher)); + break; + case kSSLProtocol3: + infof(data, "SSL 3.0 connection using %s", + TLSCipherNameForNumber(cipher)); + break; + case kTLSProtocol1: + infof(data, "TLS 1.0 connection using %s", + TLSCipherNameForNumber(cipher)); + break; +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + case kTLSProtocol11: + infof(data, "TLS 1.1 connection using %s", + TLSCipherNameForNumber(cipher)); + break; + case kTLSProtocol12: + infof(data, "TLS 1.2 connection using %s", + TLSCipherNameForNumber(cipher)); + break; +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ +#if CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11 + case kTLSProtocol13: + infof(data, "TLS 1.3 connection using %s", + TLSCipherNameForNumber(cipher)); + break; +#endif /* CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11 */ + default: + infof(data, "Unknown protocol connection"); + break; + } + +#if(CURL_BUILD_MAC_10_13 || CURL_BUILD_IOS_11) && HAVE_BUILTIN_AVAILABLE == 1 + if(conn->bits.tls_enable_alpn) { + if(__builtin_available(macOS 10.13.4, iOS 11, tvOS 11, *)) { + CFArrayRef alpnArr = NULL; + CFStringRef chosenProtocol = NULL; + err = SSLCopyALPNProtocols(backend->ssl_ctx, &alpnArr); + + if(err == noErr && alpnArr && CFArrayGetCount(alpnArr) >= 1) + chosenProtocol = CFArrayGetValueAtIndex(alpnArr, 0); + +#ifdef USE_HTTP2 + if(chosenProtocol && + !CFStringCompare(chosenProtocol, CFSTR(ALPN_H2), 0)) { + conn->negnpn = CURL_HTTP_VERSION_2; + } + else +#endif + if(chosenProtocol && + !CFStringCompare(chosenProtocol, CFSTR(ALPN_HTTP_1_1), 0)) { + conn->negnpn = CURL_HTTP_VERSION_1_1; + } + else + infof(data, "ALPN, server did not agree to a protocol"); + + Curl_multiuse_state(data, conn->negnpn == CURL_HTTP_VERSION_2 ? + BUNDLE_MULTIPLEX : BUNDLE_NO_MULTIUSE); + + /* chosenProtocol is a reference to the string within alpnArr + and doesn't need to be freed separately */ + if(alpnArr) + CFRelease(alpnArr); + } + } +#endif + + return CURLE_OK; + } +} + +static CURLcode +add_cert_to_certinfo(struct Curl_easy *data, + SecCertificateRef server_cert, + int idx) +{ + CURLcode result = CURLE_OK; + const char *beg; + const char *end; + CFDataRef cert_data = SecCertificateCopyData(server_cert); + + if(!cert_data) + return CURLE_PEER_FAILED_VERIFICATION; + + beg = (const char *)CFDataGetBytePtr(cert_data); + end = beg + CFDataGetLength(cert_data); + result = Curl_extract_certinfo(data, idx, beg, end); + CFRelease(cert_data); + return result; +} + +static CURLcode +collect_server_cert_single(struct Curl_easy *data, + SecCertificateRef server_cert, + CFIndex idx) +{ + CURLcode result = CURLE_OK; +#ifndef CURL_DISABLE_VERBOSE_STRINGS + if(data->set.verbose) { + char *certp; + result = CopyCertSubject(data, server_cert, &certp); + if(!result) { + infof(data, "Server certificate: %s", certp); + free(certp); + } + } +#endif + if(data->set.ssl.certinfo) + result = add_cert_to_certinfo(data, server_cert, (int)idx); + return result; +} + +/* This should be called during step3 of the connection at the earliest */ +static CURLcode +collect_server_cert(struct Curl_easy *data, + struct connectdata *conn, + int sockindex) +{ +#ifndef CURL_DISABLE_VERBOSE_STRINGS + const bool show_verbose_server_cert = data->set.verbose; +#else + const bool show_verbose_server_cert = false; +#endif + CURLcode result = data->set.ssl.certinfo ? + CURLE_PEER_FAILED_VERIFICATION : CURLE_OK; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct ssl_backend_data *backend = connssl->backend; + CFArrayRef server_certs = NULL; + SecCertificateRef server_cert; + OSStatus err; + CFIndex i, count; + SecTrustRef trust = NULL; + + if(!show_verbose_server_cert && !data->set.ssl.certinfo) + return CURLE_OK; + + if(!backend->ssl_ctx) + return result; + +#if CURL_BUILD_MAC_10_7 || CURL_BUILD_IOS +#if CURL_BUILD_IOS +#pragma unused(server_certs) + err = SSLCopyPeerTrust(backend->ssl_ctx, &trust); + /* For some reason, SSLCopyPeerTrust() can return noErr and yet return + a null trust, so be on guard for that: */ + if(err == noErr && trust) { + count = SecTrustGetCertificateCount(trust); + if(data->set.ssl.certinfo) + result = Curl_ssl_init_certinfo(data, (int)count); + for(i = 0L ; !result && (i < count) ; i++) { + server_cert = SecTrustGetCertificateAtIndex(trust, i); + result = collect_server_cert_single(data, server_cert, i); + } + CFRelease(trust); + } +#else + /* SSLCopyPeerCertificates() is deprecated as of Mountain Lion. + The function SecTrustGetCertificateAtIndex() is officially present + in Lion, but it is unfortunately also present in Snow Leopard as + private API and doesn't work as expected. So we have to look for + a different symbol to make sure this code is only executed under + Lion or later. */ + if(SecTrustEvaluateAsync) { +#pragma unused(server_certs) + err = SSLCopyPeerTrust(backend->ssl_ctx, &trust); + /* For some reason, SSLCopyPeerTrust() can return noErr and yet return + a null trust, so be on guard for that: */ + if(err == noErr && trust) { + count = SecTrustGetCertificateCount(trust); + if(data->set.ssl.certinfo) + result = Curl_ssl_init_certinfo(data, (int)count); + for(i = 0L ; !result && (i < count) ; i++) { + server_cert = SecTrustGetCertificateAtIndex(trust, i); + result = collect_server_cert_single(data, server_cert, i); + } + CFRelease(trust); + } + } + else { +#if CURL_SUPPORT_MAC_10_8 + err = SSLCopyPeerCertificates(backend->ssl_ctx, &server_certs); + /* Just in case SSLCopyPeerCertificates() returns null too... */ + if(err == noErr && server_certs) { + count = CFArrayGetCount(server_certs); + if(data->set.ssl.certinfo) + result = Curl_ssl_init_certinfo(data, (int)count); + for(i = 0L ; !result && (i < count) ; i++) { + server_cert = (SecCertificateRef)CFArrayGetValueAtIndex(server_certs, + i); + result = collect_server_cert_single(data, server_cert, i); + } + CFRelease(server_certs); + } +#endif /* CURL_SUPPORT_MAC_10_8 */ + } +#endif /* CURL_BUILD_IOS */ +#else +#pragma unused(trust) + err = SSLCopyPeerCertificates(backend->ssl_ctx, &server_certs); + if(err == noErr) { + count = CFArrayGetCount(server_certs); + if(data->set.ssl.certinfo) + result = Curl_ssl_init_certinfo(data, (int)count); + for(i = 0L ; !result && (i < count) ; i++) { + server_cert = (SecCertificateRef)CFArrayGetValueAtIndex(server_certs, i); + result = collect_server_cert_single(data, server_cert, i); + } + CFRelease(server_certs); + } +#endif /* CURL_BUILD_MAC_10_7 || CURL_BUILD_IOS */ + return result; +} + +static CURLcode +sectransp_connect_step3(struct Curl_easy *data, struct connectdata *conn, + int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + + /* There is no step 3! + * Well, okay, let's collect server certificates, and if verbose mode is on, + * let's print the details of the server certificates. */ + const CURLcode result = collect_server_cert(data, conn, sockindex); + if(result) + return result; + + connssl->connecting_state = ssl_connect_done; + return CURLE_OK; +} + +static Curl_recv sectransp_recv; +static Curl_send sectransp_send; + +static CURLcode +sectransp_connect_common(struct Curl_easy *data, + struct connectdata *conn, + int sockindex, + bool nonblocking, + bool *done) +{ + CURLcode result; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + curl_socket_t sockfd = conn->sock[sockindex]; + int what; + + /* check if the connection has already been established */ + if(ssl_connection_complete == connssl->state) { + *done = TRUE; + return CURLE_OK; + } + + if(ssl_connect_1 == connssl->connecting_state) { + /* Find out how much more time we're allowed */ + const timediff_t timeout_ms = Curl_timeleft(data, NULL, TRUE); + + if(timeout_ms < 0) { + /* no need to continue if time already is up */ + failf(data, "SSL connection timeout"); + return CURLE_OPERATION_TIMEDOUT; + } + + result = sectransp_connect_step1(data, conn, sockindex); + if(result) + return result; + } + + while(ssl_connect_2 == connssl->connecting_state || + ssl_connect_2_reading == connssl->connecting_state || + ssl_connect_2_writing == connssl->connecting_state) { + + /* check allowed time left */ + const timediff_t timeout_ms = Curl_timeleft(data, NULL, TRUE); + + if(timeout_ms < 0) { + /* no need to continue if time already is up */ + failf(data, "SSL connection timeout"); + return CURLE_OPERATION_TIMEDOUT; + } + + /* if ssl is expecting something, check if it's available. */ + if(connssl->connecting_state == ssl_connect_2_reading || + connssl->connecting_state == ssl_connect_2_writing) { + + curl_socket_t writefd = ssl_connect_2_writing == + connssl->connecting_state?sockfd:CURL_SOCKET_BAD; + curl_socket_t readfd = ssl_connect_2_reading == + connssl->connecting_state?sockfd:CURL_SOCKET_BAD; + + what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd, + nonblocking ? 0 : timeout_ms); + if(what < 0) { + /* fatal error */ + failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO); + return CURLE_SSL_CONNECT_ERROR; + } + else if(0 == what) { + if(nonblocking) { + *done = FALSE; + return CURLE_OK; + } + else { + /* timeout */ + failf(data, "SSL connection timeout"); + return CURLE_OPERATION_TIMEDOUT; + } + } + /* socket is readable or writable */ + } + + /* Run transaction, and return to the caller if it failed or if this + * connection is done nonblocking and this loop would execute again. This + * permits the owner of a multi handle to abort a connection attempt + * before step2 has completed while ensuring that a client using select() + * or epoll() will always have a valid fdset to wait on. + */ + result = sectransp_connect_step2(data, conn, sockindex); + if(result || (nonblocking && + (ssl_connect_2 == connssl->connecting_state || + ssl_connect_2_reading == connssl->connecting_state || + ssl_connect_2_writing == connssl->connecting_state))) + return result; + + } /* repeat step2 until all transactions are done. */ + + + if(ssl_connect_3 == connssl->connecting_state) { + result = sectransp_connect_step3(data, conn, sockindex); + if(result) + return result; + } + + if(ssl_connect_done == connssl->connecting_state) { + connssl->state = ssl_connection_complete; + conn->recv[sockindex] = sectransp_recv; + conn->send[sockindex] = sectransp_send; + *done = TRUE; + } + else + *done = FALSE; + + /* Reset our connect state machine */ + connssl->connecting_state = ssl_connect_1; + + return CURLE_OK; +} + +static CURLcode sectransp_connect_nonblocking(struct Curl_easy *data, + struct connectdata *conn, + int sockindex, bool *done) +{ + return sectransp_connect_common(data, conn, sockindex, TRUE, done); +} + +static CURLcode sectransp_connect(struct Curl_easy *data, + struct connectdata *conn, int sockindex) +{ + CURLcode result; + bool done = FALSE; + + result = sectransp_connect_common(data, conn, sockindex, FALSE, &done); + + if(result) + return result; + + DEBUGASSERT(done); + + return CURLE_OK; +} + +static void sectransp_close(struct Curl_easy *data, struct connectdata *conn, + int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct ssl_backend_data *backend = connssl->backend; + + (void) data; + + if(backend->ssl_ctx) { + (void)SSLClose(backend->ssl_ctx); +#if CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS + if(SSLCreateContext) + CFRelease(backend->ssl_ctx); +#if CURL_SUPPORT_MAC_10_8 + else + (void)SSLDisposeContext(backend->ssl_ctx); +#endif /* CURL_SUPPORT_MAC_10_8 */ +#else + (void)SSLDisposeContext(backend->ssl_ctx); +#endif /* CURL_BUILD_MAC_10_8 || CURL_BUILD_IOS */ + backend->ssl_ctx = NULL; + } + backend->ssl_sockfd = 0; +} + +static int sectransp_shutdown(struct Curl_easy *data, + struct connectdata *conn, int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct ssl_backend_data *backend = connssl->backend; + ssize_t nread; + int what; + int rc; + char buf[120]; + int loop = 10; /* avoid getting stuck */ + + if(!backend->ssl_ctx) + return 0; + +#ifndef CURL_DISABLE_FTP + if(data->set.ftp_ccc != CURLFTPSSL_CCC_ACTIVE) + return 0; +#endif + + sectransp_close(data, conn, sockindex); + + rc = 0; + + what = SOCKET_READABLE(conn->sock[sockindex], SSL_SHUTDOWN_TIMEOUT); + + while(loop--) { + if(what < 0) { + /* anything that gets here is fatally bad */ + failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO); + rc = -1; + break; + } + + if(!what) { /* timeout */ + failf(data, "SSL shutdown timeout"); + break; + } + + /* Something to read, let's do it and hope that it is the close + notify alert from the server. No way to SSL_Read now, so use read(). */ + + nread = read(conn->sock[sockindex], buf, sizeof(buf)); + + if(nread < 0) { + char buffer[STRERROR_LEN]; + failf(data, "read: %s", + Curl_strerror(errno, buffer, sizeof(buffer))); + rc = -1; + } + + if(nread <= 0) + break; + + what = SOCKET_READABLE(conn->sock[sockindex], 0); + } + + return rc; +} + +static void sectransp_session_free(void *ptr) +{ + /* ST, as of iOS 5 and Mountain Lion, has no public method of deleting a + cached session ID inside the Security framework. There is a private + function that does this, but I don't want to have to explain to you why I + got your application rejected from the App Store due to the use of a + private API, so the best we can do is free up our own char array that we + created way back in sectransp_connect_step1... */ + Curl_safefree(ptr); +} + +static size_t sectransp_version(char *buffer, size_t size) +{ + return msnprintf(buffer, size, "SecureTransport"); +} + +/* + * This function uses SSLGetSessionState to determine connection status. + * + * Return codes: + * 1 means the connection is still in place + * 0 means the connection has been closed + * -1 means the connection status is unknown + */ +static int sectransp_check_cxn(struct connectdata *conn) +{ + struct ssl_connect_data *connssl = &conn->ssl[FIRSTSOCKET]; + struct ssl_backend_data *backend = connssl->backend; + OSStatus err; + SSLSessionState state; + + if(backend->ssl_ctx) { + err = SSLGetSessionState(backend->ssl_ctx, &state); + if(err == noErr) + return state == kSSLConnected || state == kSSLHandshake; + return -1; + } + return 0; +} + +static bool sectransp_data_pending(const struct connectdata *conn, + int connindex) +{ + const struct ssl_connect_data *connssl = &conn->ssl[connindex]; + struct ssl_backend_data *backend = connssl->backend; + OSStatus err; + size_t buffer; + + if(backend->ssl_ctx) { /* SSL is in use */ + err = SSLGetBufferedReadSize(backend->ssl_ctx, &buffer); + if(err == noErr) + return buffer > 0UL; + return false; + } + else + return false; +} + +static CURLcode sectransp_random(struct Curl_easy *data UNUSED_PARAM, + unsigned char *entropy, size_t length) +{ + /* arc4random_buf() isn't available on cats older than Lion, so let's + do this manually for the benefit of the older cats. */ + size_t i; + u_int32_t random_number = 0; + + (void)data; + + for(i = 0 ; i < length ; i++) { + if(i % sizeof(u_int32_t) == 0) + random_number = arc4random(); + entropy[i] = random_number & 0xFF; + random_number >>= 8; + } + i = random_number = 0; + return CURLE_OK; +} + +static CURLcode sectransp_sha256sum(const unsigned char *tmp, /* input */ + size_t tmplen, + unsigned char *sha256sum, /* output */ + size_t sha256len) +{ + assert(sha256len >= CURL_SHA256_DIGEST_LENGTH); + (void)CC_SHA256(tmp, (CC_LONG)tmplen, sha256sum); + return CURLE_OK; +} + +static bool sectransp_false_start(void) +{ +#if CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 + if(SSLSetSessionOption) + return TRUE; +#endif + return FALSE; +} + +static ssize_t sectransp_send(struct Curl_easy *data, + int sockindex, + const void *mem, + size_t len, + CURLcode *curlcode) +{ + struct connectdata *conn = data->conn; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct ssl_backend_data *backend = connssl->backend; + size_t processed = 0UL; + OSStatus err; + + /* The SSLWrite() function works a little differently than expected. The + fourth argument (processed) is currently documented in Apple's + documentation as: "On return, the length, in bytes, of the data actually + written." + + Now, one could interpret that as "written to the socket," but actually, + it returns the amount of data that was written to a buffer internal to + the SSLContextRef instead. So it's possible for SSLWrite() to return + errSSLWouldBlock and a number of bytes "written" because those bytes were + encrypted and written to a buffer, not to the socket. + + So if this happens, then we need to keep calling SSLWrite() over and + over again with no new data until it quits returning errSSLWouldBlock. */ + + /* Do we have buffered data to write from the last time we were called? */ + if(backend->ssl_write_buffered_length) { + /* Write the buffered data: */ + err = SSLWrite(backend->ssl_ctx, NULL, 0UL, &processed); + switch(err) { + case noErr: + /* processed is always going to be 0 because we didn't write to + the buffer, so return how much was written to the socket */ + processed = backend->ssl_write_buffered_length; + backend->ssl_write_buffered_length = 0UL; + break; + case errSSLWouldBlock: /* argh, try again */ + *curlcode = CURLE_AGAIN; + return -1L; + default: + failf(data, "SSLWrite() returned error %d", err); + *curlcode = CURLE_SEND_ERROR; + return -1L; + } + } + else { + /* We've got new data to write: */ + err = SSLWrite(backend->ssl_ctx, mem, len, &processed); + if(err != noErr) { + switch(err) { + case errSSLWouldBlock: + /* Data was buffered but not sent, we have to tell the caller + to try sending again, and remember how much was buffered */ + backend->ssl_write_buffered_length = len; + *curlcode = CURLE_AGAIN; + return -1L; + default: + failf(data, "SSLWrite() returned error %d", err); + *curlcode = CURLE_SEND_ERROR; + return -1L; + } + } + } + return (ssize_t)processed; +} + +static ssize_t sectransp_recv(struct Curl_easy *data, + int num, + char *buf, + size_t buffersize, + CURLcode *curlcode) +{ + struct connectdata *conn = data->conn; + struct ssl_connect_data *connssl = &conn->ssl[num]; + struct ssl_backend_data *backend = connssl->backend; + size_t processed = 0UL; + OSStatus err; + + again: + err = SSLRead(backend->ssl_ctx, buf, buffersize, &processed); + + if(err != noErr) { + switch(err) { + case errSSLWouldBlock: /* return how much we read (if anything) */ + if(processed) + return (ssize_t)processed; + *curlcode = CURLE_AGAIN; + return -1L; + break; + + /* errSSLClosedGraceful - server gracefully shut down the SSL session + errSSLClosedNoNotify - server hung up on us instead of sending a + closure alert notice, read() is returning 0 + Either way, inform the caller that the server disconnected. */ + case errSSLClosedGraceful: + case errSSLClosedNoNotify: + *curlcode = CURLE_OK; + return -1L; + break; + + /* The below is errSSLPeerAuthCompleted; it's not defined in + Leopard's headers */ + case -9841: + if((SSL_CONN_CONFIG(CAfile) || SSL_CONN_CONFIG(ca_info_blob)) && + SSL_CONN_CONFIG(verifypeer)) { + CURLcode result = verify_cert(data, SSL_CONN_CONFIG(CAfile), + SSL_CONN_CONFIG(ca_info_blob), + backend->ssl_ctx); + if(result) + return result; + } + goto again; + default: + failf(data, "SSLRead() return error %d", err); + *curlcode = CURLE_RECV_ERROR; + return -1L; + break; + } + } + return (ssize_t)processed; +} + +static void *sectransp_get_internals(struct ssl_connect_data *connssl, + CURLINFO info UNUSED_PARAM) +{ + struct ssl_backend_data *backend = connssl->backend; + (void)info; + return backend->ssl_ctx; +} + +const struct Curl_ssl Curl_ssl_sectransp = { + { CURLSSLBACKEND_SECURETRANSPORT, "secure-transport" }, /* info */ + + SSLSUPP_CAINFO_BLOB | + SSLSUPP_CERTINFO | +#ifdef SECTRANSP_PINNEDPUBKEY + SSLSUPP_PINNEDPUBKEY, +#else + 0, +#endif /* SECTRANSP_PINNEDPUBKEY */ + + sizeof(struct ssl_backend_data), + + Curl_none_init, /* init */ + Curl_none_cleanup, /* cleanup */ + sectransp_version, /* version */ + sectransp_check_cxn, /* check_cxn */ + sectransp_shutdown, /* shutdown */ + sectransp_data_pending, /* data_pending */ + sectransp_random, /* random */ + Curl_none_cert_status_request, /* cert_status_request */ + sectransp_connect, /* connect */ + sectransp_connect_nonblocking, /* connect_nonblocking */ + Curl_ssl_getsock, /* getsock */ + sectransp_get_internals, /* get_internals */ + sectransp_close, /* close_one */ + Curl_none_close_all, /* close_all */ + sectransp_session_free, /* session_free */ + Curl_none_set_engine, /* set_engine */ + Curl_none_set_engine_default, /* set_engine_default */ + Curl_none_engines_list, /* engines_list */ + sectransp_false_start, /* false_start */ + sectransp_sha256sum, /* sha256sum */ + NULL, /* associate_connection */ + NULL /* disassociate_connection */ +}; + +#ifdef __clang__ +#pragma clang diagnostic pop +#endif + +#endif /* USE_SECTRANSP */ |