1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2012, 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 USE_WINDOWS_SSPI
27 #ifndef CURL_DISABLE_HTTP
32 #include "curl_base64.h"
33 #include "http_negotiate.h"
34 #include "curl_memory.h"
36 #define _MPRINTF_REPLACE /* use our functions only */
37 #include <curl/mprintf.h>
39 /* The last #include file should be: */
43 get_gss_name(struct connectdata *conn, bool proxy,
44 struct negotiatedata *neg_ctx)
49 if(proxy && !conn->proxy.name)
50 /* proxy auth requested but no given proxy name, error out! */
53 /* GSSAPI implementation by Globus (known as GSI) requires the name to be
54 of form "<service>/<fqdn>" instead of <service>@<fqdn> (ie. slash instead
55 of at-sign). Also GSI servers are often identified as 'host' not 'khttp'.
56 Change following lines if you want to use GSI */
58 /* IIS uses the <service>@<fqdn> form but uses 'http' as the service name,
59 and SSPI then generates an NTLM token. When using <service>/<fqdn> a
60 Kerberos token is generated. */
67 length = strlen(service) + 1 + strlen(proxy ? conn->proxy.name :
69 if(length + 1 > sizeof(neg_ctx->server_name))
72 snprintf(neg_ctx->server_name, sizeof(neg_ctx->server_name), "%s/%s",
73 service, proxy ? conn->proxy.name : conn->host.name);
78 /* returning zero (0) means success, everything else is treated as "failure"
79 with no care exactly what the failure was */
80 int Curl_input_negotiate(struct connectdata *conn, bool proxy,
83 struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
84 &conn->data->state.negotiate;
85 BYTE *input_token = 0;
86 SecBufferDesc out_buff_desc;
87 SecBuffer out_sec_buff;
88 SecBufferDesc in_buff_desc;
89 SecBuffer in_sec_buff;
90 ULONG context_attributes;
94 size_t len = 0, input_token_len = 0;
99 while(*header && ISSPACE(*header))
102 if(checkprefix("GSS-Negotiate", header)) {
103 protocol = "GSS-Negotiate";
106 else if(checkprefix("Negotiate", header)) {
107 protocol = "Negotiate";
113 if(neg_ctx->context) {
114 if(neg_ctx->gss != gss) {
119 neg_ctx->protocol = protocol;
123 if(neg_ctx->context && neg_ctx->status == SEC_E_OK) {
124 /* We finished successfully our part of authentication, but server
125 * rejected it (since we're again here). Exit with an error since we
126 * can't invent anything better */
127 Curl_cleanup_negotiate(conn->data);
131 if(0 == strlen(neg_ctx->server_name)) {
132 ret = get_gss_name(conn, proxy, neg_ctx);
137 if(!neg_ctx->output_token) {
138 PSecPkgInfo SecurityPackage;
139 ret = s_pSecFn->QuerySecurityPackageInfo((SEC_CHAR *)"Negotiate",
144 /* Allocate input and output buffers according to the max token size
145 as indicated by the security package */
146 neg_ctx->max_token_length = SecurityPackage->cbMaxToken;
147 neg_ctx->output_token = malloc(neg_ctx->max_token_length);
148 s_pSecFn->FreeContextBuffer(SecurityPackage);
151 /* Obtain the input token, if any */
152 header += strlen(neg_ctx->protocol);
153 while(*header && ISSPACE(*header))
156 len = strlen(header);
158 /* first call in a new negotation, we have to acquire credentials,
159 and allocate memory for the context */
161 neg_ctx->credentials = malloc(sizeof(CredHandle));
162 neg_ctx->context = malloc(sizeof(CtxtHandle));
164 if(!neg_ctx->credentials || !neg_ctx->context)
168 s_pSecFn->AcquireCredentialsHandle(NULL, (SEC_CHAR *)"Negotiate",
169 SECPKG_CRED_OUTBOUND, NULL, NULL,
170 NULL, NULL, neg_ctx->credentials,
172 if(neg_ctx->status != SEC_E_OK)
176 input_token = malloc(neg_ctx->max_token_length);
180 error = Curl_base64_decode(header,
181 (unsigned char **)&input_token,
183 if(error || input_token_len == 0)
187 /* prepare the output buffers, and input buffers if present */
188 out_buff_desc.ulVersion = 0;
189 out_buff_desc.cBuffers = 1;
190 out_buff_desc.pBuffers = &out_sec_buff;
192 out_sec_buff.cbBuffer = neg_ctx->max_token_length;
193 out_sec_buff.BufferType = SECBUFFER_TOKEN;
194 out_sec_buff.pvBuffer = neg_ctx->output_token;
198 in_buff_desc.ulVersion = 0;
199 in_buff_desc.cBuffers = 1;
200 in_buff_desc.pBuffers = &in_sec_buff;
202 in_sec_buff.cbBuffer = input_token_len;
203 in_sec_buff.BufferType = SECBUFFER_TOKEN;
204 in_sec_buff.pvBuffer = input_token;
207 neg_ctx->status = s_pSecFn->InitializeSecurityContext(
208 neg_ctx->credentials,
209 input_token ? neg_ctx->context : 0,
210 neg_ctx->server_name,
211 ISC_REQ_CONFIDENTIALITY,
213 SECURITY_NATIVE_DREP,
214 input_token ? &in_buff_desc : 0,
221 if(GSS_ERROR(neg_ctx->status))
224 if(neg_ctx->status == SEC_I_COMPLETE_NEEDED ||
225 neg_ctx->status == SEC_I_COMPLETE_AND_CONTINUE) {
226 neg_ctx->status = s_pSecFn->CompleteAuthToken(neg_ctx->context,
228 if(GSS_ERROR(neg_ctx->status))
232 neg_ctx->output_token_length = out_sec_buff.cbBuffer;
238 CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
240 struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg:
241 &conn->data->state.negotiate;
242 char *encoded = NULL;
247 error = Curl_base64_encode(conn->data,
248 (const char*)neg_ctx->output_token,
249 neg_ctx->output_token_length,
255 return CURLE_REMOTE_ACCESS_DENIED;
257 userp = aprintf("%sAuthorization: %s %s\r\n", proxy ? "Proxy-" : "",
258 neg_ctx->protocol, encoded);
261 conn->allocptr.proxyuserpwd = userp;
263 conn->allocptr.userpwd = userp;
265 Curl_cleanup_negotiate (conn->data);
266 return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
269 static void cleanup(struct negotiatedata *neg_ctx)
271 if(neg_ctx->context) {
272 s_pSecFn->DeleteSecurityContext(neg_ctx->context);
273 free(neg_ctx->context);
274 neg_ctx->context = 0;
277 if(neg_ctx->credentials) {
278 s_pSecFn->FreeCredentialsHandle(neg_ctx->credentials);
279 free(neg_ctx->credentials);
280 neg_ctx->credentials = 0;
283 if(neg_ctx->output_token) {
284 free(neg_ctx->output_token);
285 neg_ctx->output_token = 0;
288 neg_ctx->max_token_length = 0;
291 void Curl_cleanup_negotiate(struct SessionHandle *data)
293 cleanup(&data->state.negotiate);
294 cleanup(&data->state.proxyneg);