1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 2011 - 2016, Daniel Stenberg, <daniel (at) 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 static char spnego_oid_bytes[] = "\x2b\x06\x01\x05\x05\x02"; 31 gss_OID_desc Curl_spnego_mech_oid = { 6, &spnego_oid_bytes }; 32 static char krb5_oid_bytes[] = "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02"; 33 gss_OID_desc Curl_krb5_mech_oid = { 9, &krb5_oid_bytes }; 34 35 OM_uint32 Curl_gss_init_sec_context( 36 struct Curl_easy *data, 37 OM_uint32 *minor_status, 38 gss_ctx_id_t *context, 39 gss_name_t target_name, 40 gss_OID mech_type, 41 gss_channel_bindings_t input_chan_bindings, 42 gss_buffer_t input_token, 43 gss_buffer_t output_token, 44 const bool mutual_auth, 45 OM_uint32 *ret_flags) 46 { 47 OM_uint32 req_flags = GSS_C_REPLAY_FLAG; 48 49 if(mutual_auth) 50 req_flags |= GSS_C_MUTUAL_FLAG; 51 52 if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_POLICY_FLAG) { 53 #ifdef GSS_C_DELEG_POLICY_FLAG 54 req_flags |= GSS_C_DELEG_POLICY_FLAG; 55 #else 56 infof(data, "warning: support for CURLGSSAPI_DELEGATION_POLICY_FLAG not " 57 "compiled in\n"); 58 #endif 59 } 60 61 if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_FLAG) 62 req_flags |= GSS_C_DELEG_FLAG; 63 64 return gss_init_sec_context(minor_status, 65 GSS_C_NO_CREDENTIAL, /* cred_handle */ 66 context, 67 target_name, 68 mech_type, 69 req_flags, 70 0, /* time_req */ 71 input_chan_bindings, 72 input_token, 73 NULL, /* actual_mech_type */ 74 output_token, 75 ret_flags, 76 NULL /* time_rec */); 77 } 78 79 #define GSS_LOG_BUFFER_LEN 1024 80 static size_t display_gss_error(OM_uint32 status, int type, 81 char *buf, size_t len) { 82 OM_uint32 maj_stat; 83 OM_uint32 min_stat; 84 OM_uint32 msg_ctx = 0; 85 gss_buffer_desc status_string; 86 87 do { 88 maj_stat = gss_display_status(&min_stat, 89 status, 90 type, 91 GSS_C_NO_OID, 92 &msg_ctx, 93 &status_string); 94 if(GSS_LOG_BUFFER_LEN > len + status_string.length + 3) { 95 len += snprintf(buf + len, GSS_LOG_BUFFER_LEN - len, 96 "%.*s. ", (int)status_string.length, 97 (char*)status_string.value); 98 } 99 gss_release_buffer(&min_stat, &status_string); 100 } while(!GSS_ERROR(maj_stat) && msg_ctx != 0); 101 102 return len; 103 } 104 105 /* 106 * Curl_gss_log_error() 107 * 108 * This is used to log a GSS-API error status. 109 * 110 * Parameters: 111 * 112 * data [in] - The session handle. 113 * prefix [in] - The prefix of the log message. 114 * major [in] - The major status code. 115 * minor [in] - The minor status code. 116 */ 117 void Curl_gss_log_error(struct Curl_easy *data, const char *prefix, 118 OM_uint32 major, OM_uint32 minor) 119 { 120 char buf[GSS_LOG_BUFFER_LEN]; 121 size_t len = 0; 122 123 if(major != GSS_S_FAILURE) 124 len = display_gss_error(major, GSS_C_GSS_CODE, buf, len); 125 126 display_gss_error(minor, GSS_C_MECH_CODE, buf, len); 127 128 infof(data, "%s%s\n", prefix, buf); 129 } 130 131 #endif /* HAVE_GSSAPI */ 132