diff options
Diffstat (limited to 'Utilities/cmcurl/lib/vauth/krb5_sspi.c')
| -rw-r--r-- | Utilities/cmcurl/lib/vauth/krb5_sspi.c | 115 |
1 files changed, 32 insertions, 83 deletions
diff --git a/Utilities/cmcurl/lib/vauth/krb5_sspi.c b/Utilities/cmcurl/lib/vauth/krb5_sspi.c index b2d1635343..e110644225 100644 --- a/Utilities/cmcurl/lib/vauth/krb5_sspi.c +++ b/Utilities/cmcurl/lib/vauth/krb5_sspi.c @@ -5,7 +5,7 @@ * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * - * Copyright (C) 2014 - 2020, Steve Holme, <steve_holme@hotmail.com>. + * Copyright (C) 2014 - 2021, Steve Holme, <steve_holme@hotmail.com>. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms @@ -30,7 +30,6 @@ #include "vauth/vauth.h" #include "urldata.h" -#include "curl_base64.h" #include "warnless.h" #include "curl_multibyte.h" #include "sendf.h" @@ -81,11 +80,9 @@ bool Curl_auth_is_gssapi_supported(void) * host [in] - The host name. * mutual_auth [in] - Flag specifying whether or not mutual authentication * is enabled. - * chlg64 [in] - The optional base64 encoded challenge message. + * chlg [in] - Optional challenge message. * krb5 [in/out] - The Kerberos 5 data struct being used and modified. - * outptr [in/out] - The address where a pointer to newly allocated memory - * holding the result will be stored upon completion. - * outlen [out] - The length of the output message. + * out [out] - The result storage. * * Returns CURLE_OK on success. */ @@ -95,13 +92,11 @@ CURLcode Curl_auth_create_gssapi_user_message(struct Curl_easy *data, const char *service, const char *host, const bool mutual_auth, - const char *chlg64, + const struct bufref *chlg, struct kerberos5data *krb5, - char **outptr, size_t *outlen) + struct bufref *out) { CURLcode result = CURLE_OK; - size_t chlglen = 0; - unsigned char *chlg = NULL; CtxtHandle context; PSecPkgInfo SecurityPackage; SecBuffer chlg_buf; @@ -176,18 +171,9 @@ CURLcode Curl_auth_create_gssapi_user_message(struct Curl_easy *data, return CURLE_OUT_OF_MEMORY; } - if(chlg64 && *chlg64) { - /* Decode the base-64 encoded challenge message */ - if(*chlg64 != '=') { - result = Curl_base64_decode(chlg64, &chlg, &chlglen); - if(result) - return result; - } - - /* Ensure we have a valid challenge message */ - if(!chlg) { + if(chlg) { + if(!Curl_bufref_len(chlg)) { infof(data, "GSSAPI handshake failure (empty challenge message)\n"); - return CURLE_BAD_CONTENT_ENCODING; } @@ -196,8 +182,8 @@ CURLcode Curl_auth_create_gssapi_user_message(struct Curl_easy *data, chlg_desc.cBuffers = 1; chlg_desc.pBuffers = &chlg_buf; chlg_buf.BufferType = SECBUFFER_TOKEN; - chlg_buf.pvBuffer = chlg; - chlg_buf.cbBuffer = curlx_uztoul(chlglen); + chlg_buf.pvBuffer = (void *) Curl_bufref_ptr(chlg); + chlg_buf.cbBuffer = curlx_uztoul(Curl_bufref_len(chlg)); } /* Setup the response "output" security buffer */ @@ -220,16 +206,11 @@ CURLcode Curl_auth_create_gssapi_user_message(struct Curl_easy *data, &resp_desc, &attrs, &expiry); - /* Free the decoded challenge as it is not required anymore */ - free(chlg); - - if(status == SEC_E_INSUFFICIENT_MEMORY) { + if(status == SEC_E_INSUFFICIENT_MEMORY) return CURLE_OUT_OF_MEMORY; - } - if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) { + if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) return CURLE_AUTH_ERROR; - } if(memcmp(&context, krb5->context, sizeof(context))) { s_pSecFn->DeleteSecurityContext(krb5->context); @@ -238,15 +219,12 @@ CURLcode Curl_auth_create_gssapi_user_message(struct Curl_easy *data, } if(resp_buf.cbBuffer) { - /* Base64 encode the response */ - result = Curl_base64_encode(data, (char *) resp_buf.pvBuffer, - resp_buf.cbBuffer, outptr, outlen); - } - else if(mutual_auth) { - *outptr = strdup(""); - if(!*outptr) - result = CURLE_OUT_OF_MEMORY; + result = Curl_bufref_memdup(out, resp_buf.pvBuffer, resp_buf.cbBuffer); } + else if(mutual_auth) + Curl_bufref_set(out, "", 0, NULL); + else + Curl_bufref_set(out, NULL, 0, NULL); return result; } @@ -260,26 +238,20 @@ CURLcode Curl_auth_create_gssapi_user_message(struct Curl_easy *data, * Parameters: * * data [in] - The session handle. - * chlg64 [in] - The optional base64 encoded challenge message. + * chlg [in] - The optional challenge message. * krb5 [in/out] - The Kerberos 5 data struct being used and modified. - * outptr [in/out] - The address where a pointer to newly allocated memory - * holding the result will be stored upon completion. - * outlen [out] - The length of the output message. + * out [out] - The result storage. * * Returns CURLE_OK on success. */ CURLcode Curl_auth_create_gssapi_security_message(struct Curl_easy *data, - const char *chlg64, + const struct bufref *chlg, struct kerberos5data *krb5, - char **outptr, - size_t *outlen) + struct bufref *out) { - CURLcode result = CURLE_OK; size_t offset = 0; - size_t chlglen = 0; size_t messagelen = 0; size_t appdatalen = 0; - unsigned char *chlg = NULL; unsigned char *trailer = NULL; unsigned char *message = NULL; unsigned char *padding = NULL; @@ -298,17 +270,9 @@ CURLcode Curl_auth_create_gssapi_security_message(struct Curl_easy *data, SECURITY_STATUS status; char *user_name; - /* Decode the base-64 encoded input message */ - if(strlen(chlg64) && *chlg64 != '=') { - result = Curl_base64_decode(chlg64, &chlg, &chlglen); - if(result) - return result; - } - /* Ensure we have a valid challenge message */ - if(!chlg) { + if(!Curl_bufref_len(chlg)) { infof(data, "GSSAPI handshake failure (empty security message)\n"); - return CURLE_BAD_CONTENT_ENCODING; } @@ -316,35 +280,31 @@ CURLcode Curl_auth_create_gssapi_security_message(struct Curl_easy *data, status = s_pSecFn->QueryContextAttributes(krb5->context, SECPKG_ATTR_SIZES, &sizes); - if(status != SEC_E_OK) { - free(chlg); - if(status == SEC_E_INSUFFICIENT_MEMORY) - return CURLE_OUT_OF_MEMORY; + if(status == SEC_E_INSUFFICIENT_MEMORY) + return CURLE_OUT_OF_MEMORY; + if(status != SEC_E_OK) return CURLE_AUTH_ERROR; - } /* Get the fully qualified username back from the context */ status = s_pSecFn->QueryCredentialsAttributes(krb5->credentials, SECPKG_CRED_ATTR_NAMES, &names); - if(status != SEC_E_OK) { - free(chlg); - if(status == SEC_E_INSUFFICIENT_MEMORY) - return CURLE_OUT_OF_MEMORY; + if(status == SEC_E_INSUFFICIENT_MEMORY) + return CURLE_OUT_OF_MEMORY; + if(status != SEC_E_OK) return CURLE_AUTH_ERROR; - } /* Setup the "input" security buffer */ input_desc.ulVersion = SECBUFFER_VERSION; input_desc.cBuffers = 2; input_desc.pBuffers = input_buf; input_buf[0].BufferType = SECBUFFER_STREAM; - input_buf[0].pvBuffer = chlg; - input_buf[0].cbBuffer = curlx_uztoul(chlglen); + input_buf[0].pvBuffer = (void *) Curl_bufref_ptr(chlg); + input_buf[0].cbBuffer = curlx_uztoul(Curl_bufref_len(chlg)); input_buf[1].BufferType = SECBUFFER_DATA; input_buf[1].pvBuffer = NULL; input_buf[1].cbBuffer = 0; @@ -353,31 +313,23 @@ CURLcode Curl_auth_create_gssapi_security_message(struct Curl_easy *data, status = s_pSecFn->DecryptMessage(krb5->context, &input_desc, 0, &qop); if(status != SEC_E_OK) { infof(data, "GSSAPI handshake failure (empty security message)\n"); - - free(chlg); - return CURLE_BAD_CONTENT_ENCODING; } /* Not 4 octets long so fail as per RFC4752 Section 3.1 */ if(input_buf[1].cbBuffer != 4) { infof(data, "GSSAPI handshake failure (invalid security data)\n"); - - free(chlg); - return CURLE_BAD_CONTENT_ENCODING; } /* Copy the data out and free the challenge as it is not required anymore */ memcpy(&indata, input_buf[1].pvBuffer, 4); s_pSecFn->FreeContextBuffer(input_buf[1].pvBuffer); - free(chlg); /* Extract the security layer */ sec_layer = indata & 0x000000FF; if(!(sec_layer & KERB_WRAP_NO_ENCRYPT)) { infof(data, "GSSAPI handshake failure (invalid security layer)\n"); - return CURLE_BAD_CONTENT_ENCODING; } @@ -479,17 +431,14 @@ CURLcode Curl_auth_create_gssapi_security_message(struct Curl_easy *data, offset += wrap_buf[1].cbBuffer; memcpy(appdata + offset, wrap_buf[2].pvBuffer, wrap_buf[2].cbBuffer); - /* Base64 encode the response */ - result = Curl_base64_encode(data, (char *) appdata, appdatalen, outptr, - outlen); - /* Free all of our local buffers */ - free(appdata); free(padding); free(message); free(trailer); - return result; + /* Return the response. */ + Curl_bufref_set(out, appdata, appdatalen, curl_free); + return CURLE_OK; } /* |