1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2013, 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 ***************************************************************************/
23 #include "curl_setup.h"
26 #ifdef HAVE_OLD_GSSMIT
27 #define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
31 #ifndef CURL_DISABLE_HTTP
35 #include "curl_gssapi.h"
37 #include "curl_base64.h"
38 #include "http_negotiate.h"
39 #include "curl_memory.h"
43 # include <spnegohelp.h>
46 # include <openssl/objects.h>
51 # error "Can't compile SPNEGO support without OpenSSL."
55 #define _MPRINTF_REPLACE /* use our functions only */
56 #include <curl/mprintf.h>
58 /* The last #include file should be: */
62 get_gss_name(struct connectdata *conn, bool proxy, gss_name_t *server)
64 struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
65 &conn->data->state.negotiate;
66 OM_uint32 major_status, minor_status;
67 gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
71 /* GSSAPI implementation by Globus (known as GSI) requires the name to be
72 of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead
73 of at-sign). Also GSI servers are often identified as 'host' not 'khttp'.
74 Change following lines if you want to use GSI */
76 /* IIS uses the <service>@<fqdn> form but uses 'http' as the service name */
83 token.length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name :
85 if(token.length + 1 > sizeof(name))
88 snprintf(name, sizeof(name), "%s@%s", service, proxy ? conn->proxy.name :
91 token.value = (void *) name;
92 major_status = gss_import_name(&minor_status,
94 GSS_C_NT_HOSTBASED_SERVICE,
97 return GSS_ERROR(major_status) ? -1 : 0;
101 log_gss_error(struct connectdata *conn, OM_uint32 error_status,
104 OM_uint32 maj_stat, min_stat;
105 OM_uint32 msg_ctx = 0;
106 gss_buffer_desc status_string;
110 snprintf(buf, sizeof(buf), "%s", prefix);
113 maj_stat = gss_display_status(&min_stat,
119 if(sizeof(buf) > len + status_string.length + 1) {
120 snprintf(buf + len, sizeof(buf) - len,
121 ": %s", (char*) status_string.value);
122 len += status_string.length;
124 gss_release_buffer(&min_stat, &status_string);
125 } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
127 infof(conn->data, "%s\n", buf);
130 /* returning zero (0) means success, everything else is treated as "failure"
131 with no care exactly what the failure was */
132 int Curl_input_negotiate(struct connectdata *conn, bool proxy,
135 struct SessionHandle *data = conn->data;
136 struct negotiatedata *neg_ctx = proxy?&data->state.proxyneg:
137 &data->state.negotiate;
138 OM_uint32 major_status, minor_status, discard_st;
139 gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
140 gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
145 const char* protocol;
148 while(*header && ISSPACE(*header))
150 if(checkprefix("GSS-Negotiate", header)) {
151 protocol = "GSS-Negotiate";
154 else if(checkprefix("Negotiate", header)) {
155 protocol = "Negotiate";
161 if(neg_ctx->context) {
162 if(neg_ctx->gss != gss) {
167 neg_ctx->protocol = protocol;
171 if(neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
172 /* We finished successfully our part of authentication, but server
173 * rejected it (since we're again here). Exit with an error since we
174 * can't invent anything better */
175 Curl_cleanup_negotiate(data);
179 if(neg_ctx->server_name == NULL &&
180 (ret = get_gss_name(conn, proxy, &neg_ctx->server_name)))
183 header += strlen(neg_ctx->protocol);
184 while(*header && ISSPACE(*header))
187 len = strlen(header);
189 error = Curl_base64_decode(header,
190 (unsigned char **)&input_token.value, &rawlen);
191 if(error || rawlen == 0)
193 input_token.length = rawlen;
195 DEBUGASSERT(input_token.value != NULL);
197 #ifdef HAVE_SPNEGO /* Handle SPNEGO */
198 if(checkprefix("Negotiate", header)) {
199 unsigned char *spnegoToken = NULL;
200 size_t spnegoTokenLength = 0;
201 gss_buffer_desc mechToken = GSS_C_EMPTY_BUFFER;
203 spnegoToken = malloc(input_token.length);
204 if(spnegoToken == NULL) {
205 Curl_safefree(input_token.value);
206 return CURLE_OUT_OF_MEMORY;
208 memcpy(spnegoToken, input_token.value, input_token.length);
209 spnegoTokenLength = input_token.length;
211 if(!parseSpnegoTargetToken(spnegoToken,
215 (unsigned char**)&mechToken.value,
219 Curl_safefree(spnegoToken);
220 infof(data, "Parse SPNEGO Target Token failed\n");
222 else if(!mechToken.value || !mechToken.length) {
223 Curl_safefree(spnegoToken);
225 gss_release_buffer(&discard_st, &mechToken);
226 infof(data, "Parse SPNEGO Target Token succeeded (NULL token)\n");
229 Curl_safefree(spnegoToken);
230 Curl_safefree(input_token.value);
231 input_token.value = malloc(mechToken.length);
232 if(input_token.value == NULL) {
233 gss_release_buffer(&discard_st, &mechToken);
234 return CURLE_OUT_OF_MEMORY;
236 memcpy(input_token.value, mechToken.value, mechToken.length);
237 input_token.length = mechToken.length;
238 gss_release_buffer(&discard_st, &mechToken);
239 infof(data, "Parse SPNEGO Target Token succeeded\n");
245 major_status = Curl_gss_init_sec_context(data,
248 neg_ctx->server_name,
249 GSS_C_NO_CHANNEL_BINDINGS,
253 Curl_safefree(input_token.value);
255 neg_ctx->status = major_status;
256 if(GSS_ERROR(major_status)) {
257 if(output_token.value)
258 gss_release_buffer(&discard_st, &output_token);
259 log_gss_error(conn, minor_status, "gss_init_sec_context() failed: ");
263 if(!output_token.value || !output_token.length) {
264 if(output_token.value)
265 gss_release_buffer(&discard_st, &output_token);
269 neg_ctx->output_token = output_token;
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;
282 OM_uint32 discard_st;
284 #ifdef HAVE_SPNEGO /* Handle SPNEGO */
285 if(checkprefix("Negotiate", neg_ctx->protocol)) {
286 ASN1_OBJECT *object = NULL;
287 unsigned char *responseToken = NULL;
288 size_t responseTokenLength = 0;
289 gss_buffer_desc spnegoToken = GSS_C_EMPTY_BUFFER;
291 responseToken = malloc(neg_ctx->output_token.length);
292 if(responseToken == NULL)
293 return CURLE_OUT_OF_MEMORY;
294 memcpy(responseToken, neg_ctx->output_token.value,
295 neg_ctx->output_token.length);
296 responseTokenLength = neg_ctx->output_token.length;
298 object = OBJ_txt2obj("1.2.840.113554.1.2.2", 1);
300 Curl_safefree(responseToken);
301 return CURLE_OUT_OF_MEMORY;
304 if(!makeSpnegoInitialToken(object,
307 (unsigned char**)&spnegoToken.value,
308 &spnegoToken.length)) {
309 Curl_safefree(responseToken);
310 ASN1_OBJECT_free(object);
311 infof(conn->data, "Make SPNEGO Initial Token failed\n");
313 else if(!spnegoToken.value || !spnegoToken.length) {
314 Curl_safefree(responseToken);
315 ASN1_OBJECT_free(object);
316 if(spnegoToken.value)
317 gss_release_buffer(&discard_st, &spnegoToken);
318 infof(conn->data, "Make SPNEGO Initial Token succeeded (NULL token)\n");
321 Curl_safefree(responseToken);
322 ASN1_OBJECT_free(object);
323 gss_release_buffer(&discard_st, &neg_ctx->output_token);
324 neg_ctx->output_token.value = spnegoToken.value;
325 neg_ctx->output_token.length = spnegoToken.length;
326 infof(conn->data, "Make SPNEGO Initial Token succeeded\n");
330 error = Curl_base64_encode(conn->data,
331 neg_ctx->output_token.value,
332 neg_ctx->output_token.length,
335 gss_release_buffer(&discard_st, &neg_ctx->output_token);
336 neg_ctx->output_token.value = NULL;
337 neg_ctx->output_token.length = 0;
341 if(!encoded || !len) {
342 gss_release_buffer(&discard_st, &neg_ctx->output_token);
343 neg_ctx->output_token.value = NULL;
344 neg_ctx->output_token.length = 0;
345 return CURLE_REMOTE_ACCESS_DENIED;
348 userp = aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "",
349 neg_ctx->protocol, encoded);
351 Curl_safefree(conn->allocptr.proxyuserpwd);
352 conn->allocptr.proxyuserpwd = userp;
355 Curl_safefree(conn->allocptr.userpwd);
356 conn->allocptr.userpwd = userp;
359 Curl_safefree(encoded);
360 Curl_cleanup_negotiate(conn->data);
362 return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
365 static void cleanup(struct negotiatedata *neg_ctx)
367 OM_uint32 minor_status;
368 if(neg_ctx->context != GSS_C_NO_CONTEXT)
369 gss_delete_sec_context(&minor_status, &neg_ctx->context, GSS_C_NO_BUFFER);
371 if(neg_ctx->output_token.value)
372 gss_release_buffer(&minor_status, &neg_ctx->output_token);
374 if(neg_ctx->server_name != GSS_C_NO_NAME)
375 gss_release_name(&minor_status, &neg_ctx->server_name);
377 memset(neg_ctx, 0, sizeof(*neg_ctx));
380 void Curl_cleanup_negotiate(struct SessionHandle *data)
382 cleanup(&data->state.negotiate);
383 cleanup(&data->state.proxyneg);