1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al.
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 http://curl.haxx.se/docs/copyright.html.
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.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
25 #ifdef HAVE_OLD_GSSMIT
26 #define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
29 #ifndef CURL_DISABLE_HTTP
30 /* -- WIN32 approved -- */
40 #include "curl_base64.h"
41 #include "http_negotiate.h"
42 #include "curl_memory.h"
45 # include <spnegohelp.h>
48 # include <openssl/objects.h>
53 # error "Can't compile SPNEGO support without OpenSSL."
57 #define _MPRINTF_REPLACE /* use our functions only */
58 #include <curl/mprintf.h>
60 /* The last #include file should be: */
64 get_gss_name(struct connectdata *conn, bool proxy, gss_name_t *server)
66 struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
67 &conn->data->state.negotiate;
68 OM_uint32 major_status, minor_status;
69 gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
73 /* GSSAPI implementation by Globus (known as GSI) requires the name to be
74 of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead
75 of at-sign). Also GSI servers are often identified as 'host' not 'khttp'.
76 Change following lines if you want to use GSI */
78 /* IIS uses the <service>@<fqdn> form but uses 'http' as the service name */
85 token.length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name :
87 if(token.length + 1 > sizeof(name))
90 snprintf(name, sizeof(name), "%s@%s", service, proxy ? conn->proxy.name :
93 token.value = (void *) name;
94 major_status = gss_import_name(&minor_status,
96 GSS_C_NT_HOSTBASED_SERVICE,
99 return GSS_ERROR(major_status) ? -1 : 0;
103 log_gss_error(struct connectdata *conn, OM_uint32 error_status, const char *prefix)
105 OM_uint32 maj_stat, min_stat;
106 OM_uint32 msg_ctx = 0;
107 gss_buffer_desc status_string;
111 snprintf(buf, sizeof(buf), "%s", prefix);
114 maj_stat = gss_display_status(&min_stat,
120 if(sizeof(buf) > len + status_string.length + 1) {
121 snprintf(buf + len, sizeof(buf) - len,
122 ": %s", (char*) status_string.value);
123 len += status_string.length;
125 gss_release_buffer(&min_stat, &status_string);
126 } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
128 infof(conn->data, "%s", buf);
131 /* returning zero (0) means success, everything else is treated as "failure"
132 with no care exactly what the failure was */
133 int Curl_input_negotiate(struct connectdata *conn, bool proxy,
136 struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
137 &conn->data->state.negotiate;
138 OM_uint32 major_status, minor_status, minor_status2;
139 gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
140 gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
144 const char* protocol;
146 while(*header && ISSPACE(*header))
148 if(checkprefix("GSS-Negotiate", header)) {
149 protocol = "GSS-Negotiate";
152 else if(checkprefix("Negotiate", header)) {
153 protocol = "Negotiate";
159 if(neg_ctx->context) {
160 if(neg_ctx->gss != gss) {
165 neg_ctx->protocol = protocol;
169 if(neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
170 /* We finished succesfully our part of authentication, but server
171 * rejected it (since we're again here). Exit with an error since we
172 * can't invent anything better */
173 Curl_cleanup_negotiate(conn->data);
177 if(neg_ctx->server_name == NULL &&
178 (ret = get_gss_name(conn, proxy, &neg_ctx->server_name)))
181 header += strlen(neg_ctx->protocol);
182 while(*header && ISSPACE(*header))
185 len = strlen(header);
187 rawlen = Curl_base64_decode(header,
188 (unsigned char **)&input_token.value);
191 input_token.length = rawlen;
193 #ifdef HAVE_SPNEGO /* Handle SPNEGO */
194 if(checkprefix("Negotiate", header)) {
195 ASN1_OBJECT * object = NULL;
197 unsigned char * spnegoToken = NULL;
198 size_t spnegoTokenLength = 0;
199 unsigned char * mechToken = NULL;
200 size_t mechTokenLength = 0;
202 if(input_token.value == NULL)
203 return CURLE_OUT_OF_MEMORY;
205 spnegoToken = malloc(input_token.length);
206 if(spnegoToken == NULL)
207 return CURLE_OUT_OF_MEMORY;
209 spnegoTokenLength = input_token.length;
211 object = OBJ_txt2obj ("1.2.840.113554.1.2.2", 1);
212 if(!parseSpnegoTargetToken(spnegoToken,
222 infof(conn->data, "Parse SPNEGO Target Token failed\n");
225 free(input_token.value);
226 input_token.value = malloc(mechTokenLength);
227 if (input_token.value == NULL)
228 return CURLE_OUT_OF_MEMORY;
230 memcpy(input_token.value, mechToken,mechTokenLength);
231 input_token.length = mechTokenLength;
234 infof(conn->data, "Parse SPNEGO Target Token succeeded\n");
240 major_status = gss_init_sec_context(&minor_status,
243 neg_ctx->server_name,
247 GSS_C_NO_CHANNEL_BINDINGS,
253 if(input_token.length > 0)
254 gss_release_buffer(&minor_status2, &input_token);
255 neg_ctx->status = major_status;
256 if(GSS_ERROR(major_status)) {
257 /* Curl_cleanup_negotiate(conn->data) ??? */
258 log_gss_error(conn, minor_status,
259 "gss_init_sec_context() failed: ");
263 if(output_token.length == 0) {
267 neg_ctx->output_token = output_token;
268 /* conn->bits.close = FALSE; */
274 CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
276 struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
277 &conn->data->state.negotiate;
278 char *encoded = NULL;
281 #ifdef HAVE_SPNEGO /* Handle SPNEGO */
282 if(checkprefix("Negotiate", neg_ctx->protocol)) {
283 ASN1_OBJECT * object = NULL;
285 unsigned char * spnegoToken = NULL;
286 size_t spnegoTokenLength = 0;
287 unsigned char * responseToken = NULL;
288 size_t responseTokenLength = 0;
290 responseToken = malloc(neg_ctx->output_token.length);
291 if( responseToken == NULL)
292 return CURLE_OUT_OF_MEMORY;
293 memcpy(responseToken, neg_ctx->output_token.value,
294 neg_ctx->output_token.length);
295 responseTokenLength = neg_ctx->output_token.length;
297 object=OBJ_txt2obj ("1.2.840.113554.1.2.2", 1);
298 if(!makeSpnegoInitialToken (object,
302 &spnegoTokenLength)) {
304 responseToken = NULL;
305 infof(conn->data, "Make SPNEGO Initial Token failed\n");
308 free(neg_ctx->output_token.value);
309 responseToken = NULL;
310 neg_ctx->output_token.value = malloc(spnegoTokenLength);
311 memcpy(neg_ctx->output_token.value, spnegoToken,spnegoTokenLength);
312 neg_ctx->output_token.length = spnegoTokenLength;
315 infof(conn->data, "Make SPNEGO Initial Token succeeded\n");
319 len = Curl_base64_encode(conn->data,
320 neg_ctx->output_token.value,
321 neg_ctx->output_token.length,
325 return CURLE_OUT_OF_MEMORY;
327 conn->allocptr.userpwd =
328 aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "",
329 neg_ctx->protocol, encoded);
331 Curl_cleanup_negotiate (conn->data);
332 return (conn->allocptr.userpwd == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
335 static void cleanup(struct negotiatedata *neg_ctx)
337 OM_uint32 minor_status;
338 if(neg_ctx->context != GSS_C_NO_CONTEXT)
339 gss_delete_sec_context(&minor_status, &neg_ctx->context, GSS_C_NO_BUFFER);
341 if(neg_ctx->output_token.length != 0)
342 gss_release_buffer(&minor_status, &neg_ctx->output_token);
344 if(neg_ctx->server_name != GSS_C_NO_NAME)
345 gss_release_name(&minor_status, &neg_ctx->server_name);
347 memset(neg_ctx, 0, sizeof(*neg_ctx));
350 void Curl_cleanup_negotiate(struct SessionHandle *data)
352 cleanup(&data->state.negotiate);
353 cleanup(&data->state.proxyneg);