/* * Private HTTP definitions for CUPS. * * Copyright 2007-2018 by Apple Inc. * Copyright 1997-2007 by Easy Software Products, all rights reserved. * * Licensed under Apache License v2.0. See the file "LICENSE" for more * information. */ #ifndef _CUPS_HTTP_PRIVATE_H_ # define _CUPS_HTTP_PRIVATE_H_ /* * Include necessary headers... */ # include "config.h" # include # include # include # ifdef __sun # include # endif /* __sun */ # include # ifdef _WIN32 # define _WINSOCK_DEPRECATED_NO_WARNINGS 1 # include # include # define CUPS_SOCAST (const char *) # else # include # include # include # define CUPS_SOCAST # endif /* _WIN32 */ # ifdef HAVE_GSSAPI # ifdef HAVE_GSS_GSSAPI_H # include # elif defined(HAVE_GSSAPI_GSSAPI_H) # include # elif defined(HAVE_GSSAPI_H) # include # endif /* HAVE_GSS_GSSAPI_H */ # ifndef HAVE_GSS_C_NT_HOSTBASED_SERVICE # define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name # endif /* !HAVE_GSS_C_NT_HOSTBASED_SERVICE */ # endif /* HAVE_GSSAPI */ # ifdef HAVE_AUTHORIZATION_H # include # endif /* HAVE_AUTHORIZATION_H */ # if defined(__APPLE__) && !defined(_SOCKLEN_T) /* * macOS 10.2.x does not define socklen_t, and in fact uses an int instead of * unsigned type for length values... */ typedef int socklen_t; # endif /* __APPLE__ && !_SOCKLEN_T */ # include # include "ipp-private.h" # ifdef HAVE_GNUTLS # include # include # elif defined(HAVE_CDSASSL) # include # include # include # ifdef HAVE_SECITEM_H # include # endif /* HAVE_SECITEM_H */ # ifdef HAVE_SECCERTIFICATE_H # include # include # endif /* HAVE_SECCERTIFICATE_H */ # elif defined(HAVE_SSPISSL) # include # include # include # define SECURITY_WIN32 # include # include # endif /* HAVE_GNUTLS */ # ifndef _WIN32 # include # include # ifdef HAVE_GETIFADDRS # include # else # include # ifdef HAVE_SYS_SOCKIO_H # include # endif /* HAVE_SYS_SOCKIO_H */ # endif /* HAVE_GETIFADDRS */ # endif /* !_WIN32 */ /* * C++ magic... */ # ifdef __cplusplus extern "C" { # endif /* __cplusplus */ /* * Constants... */ # define _HTTP_MAX_SBUFFER 65536 /* Size of (de)compression buffer */ # define _HTTP_RESOLVE_DEFAULT 0 /* Just resolve with default options */ # define _HTTP_RESOLVE_STDERR 1 /* Log resolve progress to stderr */ # define _HTTP_RESOLVE_FQDN 2 /* Resolve to a FQDN */ # define _HTTP_RESOLVE_FAXOUT 4 /* Resolve FaxOut service? */ # define _HTTP_TLS_NONE 0 /* No TLS options */ # define _HTTP_TLS_ALLOW_RC4 1 /* Allow RC4 cipher suites */ # define _HTTP_TLS_ALLOW_DH 2 /* Allow DH/DHE key negotiation */ # define _HTTP_TLS_DENY_CBC 4 /* Deny CBC cipher suites */ # define _HTTP_TLS_SET_DEFAULT 128 /* Setting the default TLS options */ # define _HTTP_TLS_SSL3 0 /* Min/max version is SSL/3.0 */ # define _HTTP_TLS_1_0 1 /* Min/max version is TLS/1.0 */ # define _HTTP_TLS_1_1 2 /* Min/max version is TLS/1.1 */ # define _HTTP_TLS_1_2 3 /* Min/max version is TLS/1.2 */ # define _HTTP_TLS_1_3 4 /* Min/max version is TLS/1.3 */ # define _HTTP_TLS_MAX 5 /* Highest known TLS version */ /* * Types and functions for SSL support... */ # ifdef HAVE_GNUTLS /* * The GNU TLS library is more of a "bare metal" SSL/TLS library... */ typedef gnutls_session_t http_tls_t; typedef gnutls_certificate_credentials_t *http_tls_credentials_t; # elif defined(HAVE_CDSASSL) /* * Darwin's Security framework provides its own SSL/TLS context structure * for its IO and protocol management... */ typedef SSLContextRef http_tls_t; typedef CFArrayRef http_tls_credentials_t; # elif defined(HAVE_SSPISSL) /* * Windows' SSPI library gets a CUPS wrapper... */ typedef struct _http_sspi_s /**** SSPI/SSL data structure ****/ { CredHandle creds; /* Credentials */ CtxtHandle context; /* SSL context */ BOOL contextInitialized; /* Is context init'd? */ SecPkgContext_StreamSizes streamSizes;/* SSL data stream sizes */ BYTE *decryptBuffer; /* Data pre-decryption*/ size_t decryptBufferLength; /* Length of decrypt buffer */ size_t decryptBufferUsed; /* Bytes used in buffer */ BYTE *readBuffer; /* Data post-decryption */ int readBufferLength; /* Length of read buffer */ int readBufferUsed; /* Bytes used in buffer */ BYTE *writeBuffer; /* Data pre-encryption */ int writeBufferLength; /* Length of write buffer */ PCCERT_CONTEXT localCert, /* Local certificate */ remoteCert; /* Remote (peer's) certificate */ char error[256]; /* Most recent error message */ } _http_sspi_t; typedef _http_sspi_t *http_tls_t; typedef PCCERT_CONTEXT http_tls_credentials_t; # else /* * Otherwise define stub types since we have no SSL support... */ typedef void *http_tls_t; typedef void *http_tls_credentials_t; # endif /* HAVE_GNUTLS */ typedef enum _http_coding_e /**** HTTP content coding enumeration ****/ { _HTTP_CODING_IDENTITY, /* No content coding */ _HTTP_CODING_GZIP, /* LZ77+gzip decompression */ _HTTP_CODING_DEFLATE, /* LZ77+zlib compression */ _HTTP_CODING_GUNZIP, /* LZ77+gzip decompression */ _HTTP_CODING_INFLATE /* LZ77+zlib decompression */ } _http_coding_t; typedef enum _http_mode_e /**** HTTP mode enumeration ****/ { _HTTP_MODE_CLIENT, /* Client connected to server */ _HTTP_MODE_SERVER /* Server connected (accepted) from client */ } _http_mode_t; # ifndef _HTTP_NO_PRIVATE struct _http_s /**** HTTP connection structure ****/ { int fd; /* File descriptor for this socket */ int blocking; /* To block or not to block */ int error; /* Last error on read */ time_t activity; /* Time since last read/write */ http_state_t state; /* State of client */ http_status_t status; /* Status of last request */ http_version_t version; /* Protocol version */ http_keepalive_t keep_alive; /* Keep-alive supported? */ struct sockaddr_in _hostaddr; /* Address of connected host (deprecated) */ char hostname[HTTP_MAX_HOST], /* Name of connected host */ _fields[HTTP_FIELD_ACCEPT_ENCODING][HTTP_MAX_VALUE]; /* Field values up to Accept-Encoding (deprecated) */ char *data; /* Pointer to data buffer */ http_encoding_t data_encoding; /* Chunked or not */ int _data_remaining;/* Number of bytes left (deprecated) */ int used; /* Number of bytes used in buffer */ char buffer[HTTP_MAX_BUFFER]; /* Buffer for incoming data */ int _auth_type; /* Authentication in use (deprecated) */ unsigned char _md5_state[88]; /* MD5 state (deprecated) */ char nonce[HTTP_MAX_VALUE]; /* Nonce value */ unsigned nonce_count; /* Nonce count */ http_tls_t tls; /* TLS state information */ http_encryption_t encryption; /* Encryption requirements */ /**** New in CUPS 1.1.19 ****/ fd_set *input_set; /* select() set for httpWait() (deprecated) */ http_status_t expect; /* Expect: header */ char *cookie; /* Cookie value(s) */ /**** New in CUPS 1.1.20 ****/ char _authstring[HTTP_MAX_VALUE], /* Current Authorization value (deprecated) */ userpass[HTTP_MAX_VALUE]; /* Username:password string */ int digest_tries; /* Number of tries for digest auth */ /**** New in CUPS 1.2 ****/ off_t data_remaining; /* Number of bytes left */ http_addr_t *hostaddr; /* Current host address and port */ http_addrlist_t *addrlist; /* List of valid addresses */ char wbuffer[HTTP_MAX_BUFFER]; /* Buffer for outgoing data */ int wused; /* Write buffer bytes used */ /**** New in CUPS 1.3 ****/ char *authstring; /* Current Authorization field */ # ifdef HAVE_GSSAPI gss_OID gssmech; /* Authentication mechanism */ gss_ctx_id_t gssctx; /* Authentication context */ gss_name_t gssname; /* Authentication server name */ # endif /* HAVE_GSSAPI */ # ifdef HAVE_AUTHORIZATION_H AuthorizationRef auth_ref; /* Authorization ref */ # endif /* HAVE_AUTHORIZATION_H */ /**** New in CUPS 1.5 ****/ http_tls_credentials_t tls_credentials; /* TLS credentials */ http_timeout_cb_t timeout_cb; /* Timeout callback */ void *timeout_data; /* User data pointer */ double timeout_value; /* Timeout in seconds */ int wait_value; /* httpWait value for timeout */ # ifdef HAVE_GSSAPI char gsshost[256]; /* Hostname for Kerberos */ # endif /* HAVE_GSSAPI */ /**** New in CUPS 1.7 ****/ int tls_upgrade; /* Non-zero if we are doing an upgrade */ _http_mode_t mode; /* _HTTP_MODE_CLIENT or _HTTP_MODE_SERVER */ # ifdef HAVE_LIBZ _http_coding_t coding; /* _HTTP_CODING_xxx */ void *stream; /* (De)compression stream */ unsigned char *sbuffer; /* (De)compression buffer */ # endif /* HAVE_LIBZ */ /**** New in CUPS 2.2.9 ****/ char algorithm[65], /* Algorithm from WWW-Authenticate */ nextnonce[HTTP_MAX_VALUE], /* Next nonce value from Authentication-Info */ opaque[HTTP_MAX_VALUE], /* Opaque value from WWW-Authenticate */ realm[HTTP_MAX_VALUE]; /* Realm from WWW-Authenticate */ /**** New in CUPS 2.3 ****/ char *fields[HTTP_FIELD_MAX], /* Allocated field values */ *default_fields[HTTP_FIELD_MAX]; /* Default field values, if any */ }; # endif /* !_HTTP_NO_PRIVATE */ /* * Some OS's don't have hstrerror(), most notably Solaris... */ # ifndef HAVE_HSTRERROR extern const char *_cups_hstrerror(int error); # define hstrerror _cups_hstrerror # endif /* !HAVE_HSTRERROR */ /* * Prototypes... */ extern void _httpAddrSetPort(http_addr_t *addr, int port) _CUPS_PRIVATE; extern http_tls_credentials_t _httpCreateCredentials(cups_array_t *credentials) _CUPS_PRIVATE; extern char *_httpDecodeURI(char *dst, const char *src, size_t dstsize) _CUPS_PRIVATE; extern void _httpDisconnect(http_t *http) _CUPS_PRIVATE; extern char *_httpEncodeURI(char *dst, const char *src, size_t dstsize) _CUPS_PRIVATE; extern void _httpFreeCredentials(http_tls_credentials_t credentials) _CUPS_PRIVATE; extern const char *_httpResolveURI(const char *uri, char *resolved_uri, size_t resolved_size, int options, int (*cb)(void *context), void *context) _CUPS_PRIVATE; extern int _httpSetDigestAuthString(http_t *http, const char *nonce, const char *method, const char *resource) _CUPS_PRIVATE; extern const char *_httpStatus(cups_lang_t *lang, http_status_t status) _CUPS_PRIVATE; extern void _httpTLSInitialize(void) _CUPS_PRIVATE; extern size_t _httpTLSPending(http_t *http) _CUPS_PRIVATE; extern int _httpTLSRead(http_t *http, char *buf, int len) _CUPS_PRIVATE; extern void _httpTLSSetOptions(int options, int min_version, int max_version) _CUPS_PRIVATE; extern int _httpTLSStart(http_t *http) _CUPS_PRIVATE; extern void _httpTLSStop(http_t *http) _CUPS_PRIVATE; extern int _httpTLSWrite(http_t *http, const char *buf, int len) _CUPS_PRIVATE; extern int _httpUpdate(http_t *http, http_status_t *status) _CUPS_PRIVATE; extern int _httpWait(http_t *http, int msec, int usessl) _CUPS_PRIVATE; /* * C++ magic... */ # ifdef __cplusplus } # endif /* __cplusplus */ #endif /* !_CUPS_HTTP_PRIVATE_H_ */