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