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Annotation of embedaddon/curl/lib/curl_gssapi.c, revision 1.1

1.1     ! misho       1: /***************************************************************************
        !             2:  *                                  _   _ ____  _
        !             3:  *  Project                     ___| | | |  _ \| |
        !             4:  *                             / __| | | | |_) | |
        !             5:  *                            | (__| |_| |  _ <| |___
        !             6:  *                             \___|\___/|_| \_\_____|
        !             7:  *
        !             8:  * Copyright (C) 2011 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
        !             9:  *
        !            10:  * This software is licensed as described in the file COPYING, which
        !            11:  * you should have received as part of this distribution. The terms
        !            12:  * are also available at https://curl.haxx.se/docs/copyright.html.
        !            13:  *
        !            14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
        !            15:  * copies of the Software, and permit persons to whom the Software is
        !            16:  * furnished to do so, under the terms of the COPYING file.
        !            17:  *
        !            18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
        !            19:  * KIND, either express or implied.
        !            20:  *
        !            21:  ***************************************************************************/
        !            22: 
        !            23: #include "curl_setup.h"
        !            24: 
        !            25: #ifdef HAVE_GSSAPI
        !            26: 
        !            27: #include "curl_gssapi.h"
        !            28: #include "sendf.h"
        !            29: 
        !            30: /* The last 3 #include files should be in this order */
        !            31: #include "curl_printf.h"
        !            32: #include "curl_memory.h"
        !            33: #include "memdebug.h"
        !            34: 
        !            35: static char spnego_oid_bytes[] = "\x2b\x06\x01\x05\x05\x02";
        !            36: gss_OID_desc Curl_spnego_mech_oid = { 6, &spnego_oid_bytes };
        !            37: static char krb5_oid_bytes[] = "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02";
        !            38: gss_OID_desc Curl_krb5_mech_oid = { 9, &krb5_oid_bytes };
        !            39: 
        !            40: OM_uint32 Curl_gss_init_sec_context(
        !            41:     struct Curl_easy *data,
        !            42:     OM_uint32 *minor_status,
        !            43:     gss_ctx_id_t *context,
        !            44:     gss_name_t target_name,
        !            45:     gss_OID mech_type,
        !            46:     gss_channel_bindings_t input_chan_bindings,
        !            47:     gss_buffer_t input_token,
        !            48:     gss_buffer_t output_token,
        !            49:     const bool mutual_auth,
        !            50:     OM_uint32 *ret_flags)
        !            51: {
        !            52:   OM_uint32 req_flags = GSS_C_REPLAY_FLAG;
        !            53: 
        !            54:   if(mutual_auth)
        !            55:     req_flags |= GSS_C_MUTUAL_FLAG;
        !            56: 
        !            57:   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_POLICY_FLAG) {
        !            58: #ifdef GSS_C_DELEG_POLICY_FLAG
        !            59:     req_flags |= GSS_C_DELEG_POLICY_FLAG;
        !            60: #else
        !            61:     infof(data, "warning: support for CURLGSSAPI_DELEGATION_POLICY_FLAG not "
        !            62:         "compiled in\n");
        !            63: #endif
        !            64:   }
        !            65: 
        !            66:   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_FLAG)
        !            67:     req_flags |= GSS_C_DELEG_FLAG;
        !            68: 
        !            69:   return gss_init_sec_context(minor_status,
        !            70:                               GSS_C_NO_CREDENTIAL, /* cred_handle */
        !            71:                               context,
        !            72:                               target_name,
        !            73:                               mech_type,
        !            74:                               req_flags,
        !            75:                               0, /* time_req */
        !            76:                               input_chan_bindings,
        !            77:                               input_token,
        !            78:                               NULL, /* actual_mech_type */
        !            79:                               output_token,
        !            80:                               ret_flags,
        !            81:                               NULL /* time_rec */);
        !            82: }
        !            83: 
        !            84: #define GSS_LOG_BUFFER_LEN 1024
        !            85: static size_t display_gss_error(OM_uint32 status, int type,
        !            86:                                 char *buf, size_t len) {
        !            87:   OM_uint32 maj_stat;
        !            88:   OM_uint32 min_stat;
        !            89:   OM_uint32 msg_ctx = 0;
        !            90:   gss_buffer_desc status_string;
        !            91: 
        !            92:   do {
        !            93:     maj_stat = gss_display_status(&min_stat,
        !            94:                                   status,
        !            95:                                   type,
        !            96:                                   GSS_C_NO_OID,
        !            97:                                   &msg_ctx,
        !            98:                                   &status_string);
        !            99:     if(GSS_LOG_BUFFER_LEN > len + status_string.length + 3) {
        !           100:       len += msnprintf(buf + len, GSS_LOG_BUFFER_LEN - len,
        !           101:                        "%.*s. ", (int)status_string.length,
        !           102:                        (char *)status_string.value);
        !           103:     }
        !           104:     gss_release_buffer(&min_stat, &status_string);
        !           105:   } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
        !           106: 
        !           107:   return len;
        !           108: }
        !           109: 
        !           110: /*
        !           111:  * Curl_gss_log_error()
        !           112:  *
        !           113:  * This is used to log a GSS-API error status.
        !           114:  *
        !           115:  * Parameters:
        !           116:  *
        !           117:  * data    [in] - The session handle.
        !           118:  * prefix  [in] - The prefix of the log message.
        !           119:  * major   [in] - The major status code.
        !           120:  * minor   [in] - The minor status code.
        !           121:  */
        !           122: void Curl_gss_log_error(struct Curl_easy *data, const char *prefix,
        !           123:                         OM_uint32 major, OM_uint32 minor)
        !           124: {
        !           125:   char buf[GSS_LOG_BUFFER_LEN];
        !           126:   size_t len = 0;
        !           127: 
        !           128:   if(major != GSS_S_FAILURE)
        !           129:     len = display_gss_error(major, GSS_C_GSS_CODE, buf, len);
        !           130: 
        !           131:   display_gss_error(minor, GSS_C_MECH_CODE, buf, len);
        !           132: 
        !           133:   infof(data, "%s%s\n", prefix, buf);
        !           134: }
        !           135: 
        !           136: #endif /* HAVE_GSSAPI */