[337] | 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) 2009, Markus Moeller, <markus_moeller@compuserve.com>
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| 9 | * Copyright (C) 2012 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 10 | *
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| 11 | * This software is licensed as described in the file COPYING, which
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| 12 | * you should have received as part of this distribution. The terms
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| 13 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 14 | *
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| 15 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 16 | * copies of the Software, and permit persons to whom the Software is
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| 17 | * furnished to do so, under the terms of the COPYING file.
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| 18 | *
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| 19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 20 | * KIND, either express or implied.
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| 21 | *
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| 22 | ***************************************************************************/
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| 23 |
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| 24 | #include "curl_setup.h"
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| 25 |
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| 26 | #if defined(HAVE_GSSAPI) && !defined(CURL_DISABLE_PROXY)
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| 27 |
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| 28 | #include "curl_gssapi.h"
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| 29 | #include "urldata.h"
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| 30 | #include "sendf.h"
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| 31 | #include "connect.h"
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| 32 | #include "timeval.h"
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| 33 | #include "socks.h"
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| 34 | #include "warnless.h"
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| 35 |
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| 36 | /* The last 3 #include files should be in this order */
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| 37 | #include "curl_printf.h"
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| 38 | #include "curl_memory.h"
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| 39 | #include "memdebug.h"
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| 40 |
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| 41 | static gss_ctx_id_t gss_context = GSS_C_NO_CONTEXT;
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| 42 |
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| 43 | /*
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| 44 | * Helper GSS-API error functions.
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| 45 | */
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| 46 | static int check_gss_err(struct Curl_easy *data,
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| 47 | OM_uint32 major_status,
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| 48 | OM_uint32 minor_status,
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| 49 | const char *function)
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| 50 | {
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| 51 | if(GSS_ERROR(major_status)) {
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| 52 | OM_uint32 maj_stat, min_stat;
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| 53 | OM_uint32 msg_ctx = 0;
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| 54 | gss_buffer_desc status_string;
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| 55 | char buf[1024];
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| 56 | size_t len;
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| 57 |
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| 58 | len = 0;
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| 59 | msg_ctx = 0;
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| 60 | while(!msg_ctx) {
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| 61 | /* convert major status code (GSS-API error) to text */
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| 62 | maj_stat = gss_display_status(&min_stat, major_status,
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| 63 | GSS_C_GSS_CODE,
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| 64 | GSS_C_NULL_OID,
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| 65 | &msg_ctx, &status_string);
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| 66 | if(maj_stat == GSS_S_COMPLETE) {
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| 67 | if(sizeof(buf) > len + status_string.length + 1) {
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| 68 | strcpy(buf + len, (char *) status_string.value);
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| 69 | len += status_string.length;
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| 70 | }
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| 71 | gss_release_buffer(&min_stat, &status_string);
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| 72 | break;
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| 73 | }
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| 74 | gss_release_buffer(&min_stat, &status_string);
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| 75 | }
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| 76 | if(sizeof(buf) > len + 3) {
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| 77 | strcpy(buf + len, ".\n");
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| 78 | len += 2;
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| 79 | }
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| 80 | msg_ctx = 0;
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| 81 | while(!msg_ctx) {
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| 82 | /* convert minor status code (underlying routine error) to text */
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| 83 | maj_stat = gss_display_status(&min_stat, minor_status,
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| 84 | GSS_C_MECH_CODE,
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| 85 | GSS_C_NULL_OID,
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| 86 | &msg_ctx, &status_string);
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| 87 | if(maj_stat == GSS_S_COMPLETE) {
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| 88 | if(sizeof(buf) > len + status_string.length)
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| 89 | strcpy(buf + len, (char *) status_string.value);
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| 90 | gss_release_buffer(&min_stat, &status_string);
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| 91 | break;
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| 92 | }
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| 93 | gss_release_buffer(&min_stat, &status_string);
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| 94 | }
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| 95 | failf(data, "GSS-API error: %s failed:\n%s", function, buf);
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| 96 | return 1;
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| 97 | }
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| 98 |
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| 99 | return 0;
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| 100 | }
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| 101 |
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| 102 | CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex,
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| 103 | struct connectdata *conn)
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| 104 | {
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| 105 | struct Curl_easy *data = conn->data;
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| 106 | curl_socket_t sock = conn->sock[sockindex];
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| 107 | CURLcode code;
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| 108 | ssize_t actualread;
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| 109 | ssize_t written;
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| 110 | int result;
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| 111 | OM_uint32 gss_major_status, gss_minor_status, gss_status;
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| 112 | OM_uint32 gss_ret_flags;
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| 113 | int gss_conf_state, gss_enc;
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| 114 | gss_buffer_desc service = GSS_C_EMPTY_BUFFER;
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| 115 | gss_buffer_desc gss_send_token = GSS_C_EMPTY_BUFFER;
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| 116 | gss_buffer_desc gss_recv_token = GSS_C_EMPTY_BUFFER;
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| 117 | gss_buffer_desc gss_w_token = GSS_C_EMPTY_BUFFER;
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| 118 | gss_buffer_desc* gss_token = GSS_C_NO_BUFFER;
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| 119 | gss_name_t server = GSS_C_NO_NAME;
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| 120 | gss_name_t gss_client_name = GSS_C_NO_NAME;
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| 121 | unsigned short us_length;
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| 122 | char *user = NULL;
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| 123 | unsigned char socksreq[4]; /* room for GSS-API exchange header only */
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| 124 | const char *serviceptr = data->set.str[STRING_PROXY_SERVICE_NAME] ?
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| 125 | data->set.str[STRING_PROXY_SERVICE_NAME] : "rcmd";
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| 126 | const size_t serviceptr_length = strlen(serviceptr);
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| 127 |
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| 128 | /* GSS-API request looks like
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| 129 | * +----+------+-----+----------------+
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| 130 | * |VER | MTYP | LEN | TOKEN |
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| 131 | * +----+------+----------------------+
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| 132 | * | 1 | 1 | 2 | up to 2^16 - 1 |
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| 133 | * +----+------+-----+----------------+
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| 134 | */
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| 135 |
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| 136 | /* prepare service name */
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| 137 | if(strchr(serviceptr, '/')) {
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| 138 | service.length = serviceptr_length;
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| 139 | service.value = malloc(service.length);
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| 140 | if(!service.value)
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| 141 | return CURLE_OUT_OF_MEMORY;
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| 142 | memcpy(service.value, serviceptr, service.length);
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| 143 |
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| 144 | gss_major_status = gss_import_name(&gss_minor_status, &service,
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| 145 | (gss_OID) GSS_C_NULL_OID, &server);
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| 146 | }
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| 147 | else {
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| 148 | service.value = malloc(serviceptr_length +
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| 149 | strlen(conn->socks_proxy.host.name) + 2);
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| 150 | if(!service.value)
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| 151 | return CURLE_OUT_OF_MEMORY;
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| 152 | service.length = serviceptr_length +
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| 153 | strlen(conn->socks_proxy.host.name) + 1;
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| 154 | snprintf(service.value, service.length + 1, "%s@%s",
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| 155 | serviceptr, conn->socks_proxy.host.name);
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| 156 |
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| 157 | gss_major_status = gss_import_name(&gss_minor_status, &service,
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| 158 | GSS_C_NT_HOSTBASED_SERVICE, &server);
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| 159 | }
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| 160 |
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| 161 | gss_release_buffer(&gss_status, &service); /* clear allocated memory */
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| 162 |
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| 163 | if(check_gss_err(data, gss_major_status,
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| 164 | gss_minor_status, "gss_import_name()")) {
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| 165 | failf(data, "Failed to create service name.");
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| 166 | gss_release_name(&gss_status, &server);
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| 167 | return CURLE_COULDNT_CONNECT;
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| 168 | }
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| 169 |
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| 170 | /* As long as we need to keep sending some context info, and there's no */
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| 171 | /* errors, keep sending it... */
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| 172 | for(;;) {
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| 173 | gss_major_status = Curl_gss_init_sec_context(data,
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| 174 | &gss_minor_status,
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| 175 | &gss_context,
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| 176 | server,
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| 177 | &Curl_krb5_mech_oid,
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| 178 | NULL,
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| 179 | gss_token,
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| 180 | &gss_send_token,
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| 181 | TRUE,
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| 182 | &gss_ret_flags);
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| 183 |
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| 184 | if(gss_token != GSS_C_NO_BUFFER)
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| 185 | gss_release_buffer(&gss_status, &gss_recv_token);
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| 186 | if(check_gss_err(data, gss_major_status,
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| 187 | gss_minor_status, "gss_init_sec_context")) {
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| 188 | gss_release_name(&gss_status, &server);
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| 189 | gss_release_buffer(&gss_status, &gss_recv_token);
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| 190 | gss_release_buffer(&gss_status, &gss_send_token);
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| 191 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 192 | failf(data, "Failed to initial GSS-API token.");
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| 193 | return CURLE_COULDNT_CONNECT;
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| 194 | }
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| 195 |
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| 196 | if(gss_send_token.length != 0) {
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| 197 | socksreq[0] = 1; /* GSS-API subnegotiation version */
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| 198 | socksreq[1] = 1; /* authentication message type */
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| 199 | us_length = htons((short)gss_send_token.length);
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| 200 | memcpy(socksreq + 2, &us_length, sizeof(short));
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| 201 |
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| 202 | code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
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| 203 | if(code || (4 != written)) {
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| 204 | failf(data, "Failed to send GSS-API authentication request.");
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| 205 | gss_release_name(&gss_status, &server);
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| 206 | gss_release_buffer(&gss_status, &gss_recv_token);
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| 207 | gss_release_buffer(&gss_status, &gss_send_token);
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| 208 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 209 | return CURLE_COULDNT_CONNECT;
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| 210 | }
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| 211 |
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| 212 | code = Curl_write_plain(conn, sock, (char *)gss_send_token.value,
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| 213 | gss_send_token.length, &written);
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| 214 |
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| 215 | if(code || ((ssize_t)gss_send_token.length != written)) {
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| 216 | failf(data, "Failed to send GSS-API authentication token.");
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| 217 | gss_release_name(&gss_status, &server);
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| 218 | gss_release_buffer(&gss_status, &gss_recv_token);
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| 219 | gss_release_buffer(&gss_status, &gss_send_token);
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| 220 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 221 | return CURLE_COULDNT_CONNECT;
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| 222 | }
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| 223 |
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| 224 | }
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| 225 |
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| 226 | gss_release_buffer(&gss_status, &gss_send_token);
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| 227 | gss_release_buffer(&gss_status, &gss_recv_token);
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| 228 | if(gss_major_status != GSS_S_CONTINUE_NEEDED) break;
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| 229 |
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| 230 | /* analyse response */
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| 231 |
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| 232 | /* GSS-API response looks like
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| 233 | * +----+------+-----+----------------+
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| 234 | * |VER | MTYP | LEN | TOKEN |
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| 235 | * +----+------+----------------------+
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| 236 | * | 1 | 1 | 2 | up to 2^16 - 1 |
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| 237 | * +----+------+-----+----------------+
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| 238 | */
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| 239 |
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| 240 | result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
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| 241 | if(result || (actualread != 4)) {
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| 242 | failf(data, "Failed to receive GSS-API authentication response.");
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| 243 | gss_release_name(&gss_status, &server);
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| 244 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 245 | return CURLE_COULDNT_CONNECT;
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| 246 | }
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| 247 |
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| 248 | /* ignore the first (VER) byte */
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| 249 | if(socksreq[1] == 255) { /* status / message type */
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| 250 | failf(data, "User was rejected by the SOCKS5 server (%d %d).",
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| 251 | socksreq[0], socksreq[1]);
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| 252 | gss_release_name(&gss_status, &server);
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| 253 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 254 | return CURLE_COULDNT_CONNECT;
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| 255 | }
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| 256 |
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| 257 | if(socksreq[1] != 1) { /* status / messgae type */
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| 258 | failf(data, "Invalid GSS-API authentication response type (%d %d).",
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| 259 | socksreq[0], socksreq[1]);
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| 260 | gss_release_name(&gss_status, &server);
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| 261 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 262 | return CURLE_COULDNT_CONNECT;
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| 263 | }
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| 264 |
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| 265 | memcpy(&us_length, socksreq + 2, sizeof(short));
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| 266 | us_length = ntohs(us_length);
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| 267 |
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| 268 | gss_recv_token.length = us_length;
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| 269 | gss_recv_token.value = malloc(us_length);
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| 270 | if(!gss_recv_token.value) {
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| 271 | failf(data,
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| 272 | "Could not allocate memory for GSS-API authentication "
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| 273 | "response token.");
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| 274 | gss_release_name(&gss_status, &server);
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| 275 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 276 | return CURLE_OUT_OF_MEMORY;
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| 277 | }
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| 278 |
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| 279 | result = Curl_blockread_all(conn, sock, (char *)gss_recv_token.value,
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| 280 | gss_recv_token.length, &actualread);
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| 281 |
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| 282 | if(result || (actualread != us_length)) {
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| 283 | failf(data, "Failed to receive GSS-API authentication token.");
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| 284 | gss_release_name(&gss_status, &server);
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| 285 | gss_release_buffer(&gss_status, &gss_recv_token);
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| 286 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 287 | return CURLE_COULDNT_CONNECT;
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| 288 | }
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| 289 |
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| 290 | gss_token = &gss_recv_token;
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| 291 | }
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| 292 |
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| 293 | gss_release_name(&gss_status, &server);
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| 294 |
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| 295 | /* Everything is good so far, user was authenticated! */
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| 296 | gss_major_status = gss_inquire_context(&gss_minor_status, gss_context,
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| 297 | &gss_client_name, NULL, NULL, NULL,
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| 298 | NULL, NULL, NULL);
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| 299 | if(check_gss_err(data, gss_major_status,
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| 300 | gss_minor_status, "gss_inquire_context")) {
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| 301 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 302 | gss_release_name(&gss_status, &gss_client_name);
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| 303 | failf(data, "Failed to determine user name.");
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| 304 | return CURLE_COULDNT_CONNECT;
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| 305 | }
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| 306 | gss_major_status = gss_display_name(&gss_minor_status, gss_client_name,
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| 307 | &gss_send_token, NULL);
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| 308 | if(check_gss_err(data, gss_major_status,
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| 309 | gss_minor_status, "gss_display_name")) {
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| 310 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 311 | gss_release_name(&gss_status, &gss_client_name);
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| 312 | gss_release_buffer(&gss_status, &gss_send_token);
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| 313 | failf(data, "Failed to determine user name.");
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| 314 | return CURLE_COULDNT_CONNECT;
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| 315 | }
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| 316 | user = malloc(gss_send_token.length + 1);
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| 317 | if(!user) {
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| 318 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 319 | gss_release_name(&gss_status, &gss_client_name);
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| 320 | gss_release_buffer(&gss_status, &gss_send_token);
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| 321 | return CURLE_OUT_OF_MEMORY;
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| 322 | }
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| 323 |
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| 324 | memcpy(user, gss_send_token.value, gss_send_token.length);
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| 325 | user[gss_send_token.length] = '\0';
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| 326 | gss_release_name(&gss_status, &gss_client_name);
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| 327 | gss_release_buffer(&gss_status, &gss_send_token);
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| 328 | infof(data, "SOCKS5 server authencticated user %s with GSS-API.\n",user);
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| 329 | free(user);
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| 330 | user = NULL;
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| 331 |
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| 332 | /* Do encryption */
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| 333 | socksreq[0] = 1; /* GSS-API subnegotiation version */
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| 334 | socksreq[1] = 2; /* encryption message type */
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| 335 |
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| 336 | gss_enc = 0; /* no data protection */
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| 337 | /* do confidentiality protection if supported */
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| 338 | if(gss_ret_flags & GSS_C_CONF_FLAG)
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| 339 | gss_enc = 2;
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| 340 | /* else do integrity protection */
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| 341 | else if(gss_ret_flags & GSS_C_INTEG_FLAG)
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| 342 | gss_enc = 1;
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| 343 |
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| 344 | infof(data, "SOCKS5 server supports GSS-API %s data protection.\n",
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| 345 | (gss_enc == 0)?"no":((gss_enc==1)?"integrity":"confidentiality"));
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| 346 | /* force for the moment to no data protection */
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| 347 | gss_enc = 0;
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| 348 | /*
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| 349 | * Sending the encryption type in clear seems wrong. It should be
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| 350 | * protected with gss_seal()/gss_wrap(). See RFC1961 extract below
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| 351 | * The NEC reference implementations on which this is based is
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| 352 | * therefore at fault
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| 353 | *
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| 354 | * +------+------+------+.......................+
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| 355 | * + ver | mtyp | len | token |
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| 356 | * +------+------+------+.......................+
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| 357 | * + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets |
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| 358 | * +------+------+------+.......................+
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| 359 | *
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| 360 | * Where:
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| 361 | *
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| 362 | * - "ver" is the protocol version number, here 1 to represent the
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| 363 | * first version of the SOCKS/GSS-API protocol
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| 364 | *
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| 365 | * - "mtyp" is the message type, here 2 to represent a protection
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| 366 | * -level negotiation message
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| 367 | *
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| 368 | * - "len" is the length of the "token" field in octets
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| 369 | *
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| 370 | * - "token" is the GSS-API encapsulated protection level
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| 371 | *
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| 372 | * The token is produced by encapsulating an octet containing the
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| 373 | * required protection level using gss_seal()/gss_wrap() with conf_req
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| 374 | * set to FALSE. The token is verified using gss_unseal()/
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| 375 | * gss_unwrap().
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| 376 | *
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| 377 | */
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| 378 | if(data->set.socks5_gssapi_nec) {
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| 379 | us_length = htons((short)1);
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| 380 | memcpy(socksreq + 2, &us_length, sizeof(short));
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| 381 | }
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| 382 | else {
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| 383 | gss_send_token.length = 1;
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| 384 | gss_send_token.value = malloc(1);
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| 385 | if(!gss_send_token.value) {
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| 386 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 387 | return CURLE_OUT_OF_MEMORY;
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| 388 | }
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| 389 | memcpy(gss_send_token.value, &gss_enc, 1);
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| 390 |
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| 391 | gss_major_status = gss_wrap(&gss_minor_status, gss_context, 0,
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| 392 | GSS_C_QOP_DEFAULT, &gss_send_token,
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| 393 | &gss_conf_state, &gss_w_token);
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| 394 |
|
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| 395 | if(check_gss_err(data, gss_major_status, gss_minor_status, "gss_wrap")) {
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| 396 | gss_release_buffer(&gss_status, &gss_send_token);
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| 397 | gss_release_buffer(&gss_status, &gss_w_token);
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| 398 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
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| 399 | failf(data, "Failed to wrap GSS-API encryption value into token.");
|
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| 400 | return CURLE_COULDNT_CONNECT;
|
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| 401 | }
|
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| 402 | gss_release_buffer(&gss_status, &gss_send_token);
|
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| 403 |
|
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| 404 | us_length = htons((short)gss_w_token.length);
|
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| 405 | memcpy(socksreq + 2, &us_length, sizeof(short));
|
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| 406 | }
|
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| 407 |
|
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| 408 | code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
|
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| 409 | if(code || (4 != written)) {
|
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| 410 | failf(data, "Failed to send GSS-API encryption request.");
|
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| 411 | gss_release_buffer(&gss_status, &gss_w_token);
|
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| 412 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
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| 413 | return CURLE_COULDNT_CONNECT;
|
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| 414 | }
|
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| 415 |
|
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| 416 | if(data->set.socks5_gssapi_nec) {
|
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| 417 | memcpy(socksreq, &gss_enc, 1);
|
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| 418 | code = Curl_write_plain(conn, sock, socksreq, 1, &written);
|
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| 419 | if(code || ( 1 != written)) {
|
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| 420 | failf(data, "Failed to send GSS-API encryption type.");
|
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| 421 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 422 | return CURLE_COULDNT_CONNECT;
|
---|
| 423 | }
|
---|
| 424 | }
|
---|
| 425 | else {
|
---|
| 426 | code = Curl_write_plain(conn, sock, (char *)gss_w_token.value,
|
---|
| 427 | gss_w_token.length, &written);
|
---|
| 428 | if(code || ((ssize_t)gss_w_token.length != written)) {
|
---|
| 429 | failf(data, "Failed to send GSS-API encryption type.");
|
---|
| 430 | gss_release_buffer(&gss_status, &gss_w_token);
|
---|
| 431 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 432 | return CURLE_COULDNT_CONNECT;
|
---|
| 433 | }
|
---|
| 434 | gss_release_buffer(&gss_status, &gss_w_token);
|
---|
| 435 | }
|
---|
| 436 |
|
---|
| 437 | result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
|
---|
| 438 | if(result || (actualread != 4)) {
|
---|
| 439 | failf(data, "Failed to receive GSS-API encryption response.");
|
---|
| 440 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 441 | return CURLE_COULDNT_CONNECT;
|
---|
| 442 | }
|
---|
| 443 |
|
---|
| 444 | /* ignore the first (VER) byte */
|
---|
| 445 | if(socksreq[1] == 255) { /* status / message type */
|
---|
| 446 | failf(data, "User was rejected by the SOCKS5 server (%d %d).",
|
---|
| 447 | socksreq[0], socksreq[1]);
|
---|
| 448 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 449 | return CURLE_COULDNT_CONNECT;
|
---|
| 450 | }
|
---|
| 451 |
|
---|
| 452 | if(socksreq[1] != 2) { /* status / messgae type */
|
---|
| 453 | failf(data, "Invalid GSS-API encryption response type (%d %d).",
|
---|
| 454 | socksreq[0], socksreq[1]);
|
---|
| 455 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 456 | return CURLE_COULDNT_CONNECT;
|
---|
| 457 | }
|
---|
| 458 |
|
---|
| 459 | memcpy(&us_length, socksreq + 2, sizeof(short));
|
---|
| 460 | us_length = ntohs(us_length);
|
---|
| 461 |
|
---|
| 462 | gss_recv_token.length = us_length;
|
---|
| 463 | gss_recv_token.value = malloc(gss_recv_token.length);
|
---|
| 464 | if(!gss_recv_token.value) {
|
---|
| 465 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 466 | return CURLE_OUT_OF_MEMORY;
|
---|
| 467 | }
|
---|
| 468 | result = Curl_blockread_all(conn, sock, (char *)gss_recv_token.value,
|
---|
| 469 | gss_recv_token.length, &actualread);
|
---|
| 470 |
|
---|
| 471 | if(result || (actualread != us_length)) {
|
---|
| 472 | failf(data, "Failed to receive GSS-API encryptrion type.");
|
---|
| 473 | gss_release_buffer(&gss_status, &gss_recv_token);
|
---|
| 474 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 475 | return CURLE_COULDNT_CONNECT;
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 | if(!data->set.socks5_gssapi_nec) {
|
---|
| 479 | gss_major_status = gss_unwrap(&gss_minor_status, gss_context,
|
---|
| 480 | &gss_recv_token, &gss_w_token,
|
---|
| 481 | 0, GSS_C_QOP_DEFAULT);
|
---|
| 482 |
|
---|
| 483 | if(check_gss_err(data, gss_major_status, gss_minor_status, "gss_unwrap")) {
|
---|
| 484 | gss_release_buffer(&gss_status, &gss_recv_token);
|
---|
| 485 | gss_release_buffer(&gss_status, &gss_w_token);
|
---|
| 486 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 487 | failf(data, "Failed to unwrap GSS-API encryption value into token.");
|
---|
| 488 | return CURLE_COULDNT_CONNECT;
|
---|
| 489 | }
|
---|
| 490 | gss_release_buffer(&gss_status, &gss_recv_token);
|
---|
| 491 |
|
---|
| 492 | if(gss_w_token.length != 1) {
|
---|
| 493 | failf(data, "Invalid GSS-API encryption response length (%d).",
|
---|
| 494 | gss_w_token.length);
|
---|
| 495 | gss_release_buffer(&gss_status, &gss_w_token);
|
---|
| 496 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 497 | return CURLE_COULDNT_CONNECT;
|
---|
| 498 | }
|
---|
| 499 |
|
---|
| 500 | memcpy(socksreq, gss_w_token.value, gss_w_token.length);
|
---|
| 501 | gss_release_buffer(&gss_status, &gss_w_token);
|
---|
| 502 | }
|
---|
| 503 | else {
|
---|
| 504 | if(gss_recv_token.length != 1) {
|
---|
| 505 | failf(data, "Invalid GSS-API encryption response length (%d).",
|
---|
| 506 | gss_recv_token.length);
|
---|
| 507 | gss_release_buffer(&gss_status, &gss_recv_token);
|
---|
| 508 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 509 | return CURLE_COULDNT_CONNECT;
|
---|
| 510 | }
|
---|
| 511 |
|
---|
| 512 | memcpy(socksreq, gss_recv_token.value, gss_recv_token.length);
|
---|
| 513 | gss_release_buffer(&gss_status, &gss_recv_token);
|
---|
| 514 | }
|
---|
| 515 |
|
---|
| 516 | infof(data, "SOCKS5 access with%s protection granted.\n",
|
---|
| 517 | (socksreq[0] == 0)?"out GSS-API data":
|
---|
| 518 | ((socksreq[0] == 1)?" GSS-API integrity":" GSS-API confidentiality"));
|
---|
| 519 |
|
---|
| 520 | conn->socks5_gssapi_enctype = socksreq[0];
|
---|
| 521 | if(socksreq[0] == 0)
|
---|
| 522 | gss_delete_sec_context(&gss_status, &gss_context, NULL);
|
---|
| 523 |
|
---|
| 524 | return CURLE_OK;
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 | #endif /* HAVE_GSSAPI && !CURL_DISABLE_PROXY */
|
---|