1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2014, Steve Holme, <steve_holme@hotmail.com>.
* Copyright (C) 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* RFC2831 DIGEST-MD5 authentication
* RFC4422 Simple Authentication and Security Layer (SASL)
* RFC4752 The Kerberos V5 ("GSSAPI") SASL Mechanism
*
***************************************************************************/
#include "curl_setup.h"
#if defined(USE_WINDOWS_SSPI)
#include <curl/curl.h>
#include "curl_sasl.h"
#include "urldata.h"
#include "curl_base64.h"
#include "warnless.h"
#include "curl_memory.h"
#include "curl_multibyte.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
/* The last #include file should be: */
#include "memdebug.h"
void Curl_sasl_gssapi_cleanup(struct kerberos5data *krb5);
/*
* Curl_sasl_build_spn()
*
* This is used to build a SPN string in the format service/host.
*
* Parameters:
*
* serivce [in] - The service type such as www, smtp, pop or imap.
* instance [in] - The instance name such as the host nme or realm.
*
* Returns a pointer to the newly allocated SPN.
*/
TCHAR *Curl_sasl_build_spn(const char *service, const char *host)
{
char *utf8_spn = NULL;
TCHAR *tchar_spn = NULL;
/* Note: We could use DsMakeSPN() or DsClientMakeSpnForTargetServer() rather
than doing this ourselves but the first is only available in Windows XP
and Windows Server 2003 and the latter is only available in Windows 2000
but not Windows95/98/ME or Windows NT4.0 unless the Active Directory
Client Extensions are installed. As such it is far simpler for us to
formulate the SPN instead. */
/* Allocate our UTF8 based SPN */
utf8_spn = aprintf("%s/%s", service, host);
if(!utf8_spn) {
return NULL;
}
/* Allocate our TCHAR based SPN */
tchar_spn = Curl_convert_UTF8_to_tchar(utf8_spn);
if(!tchar_spn) {
Curl_safefree(utf8_spn);
return NULL;
}
/* Release the UTF8 variant when operating with Unicode */
if(utf8_spn != tchar_spn)
Curl_safefree(utf8_spn);
/* Return our newly allocated SPN */
return tchar_spn;
}
#if !defined(CURL_DISABLE_CRYPTO_AUTH)
/*
* Curl_sasl_create_digest_md5_message()
*
* This is used to generate an already encoded DIGEST-MD5 response message
* ready for sending to the recipient.
*
* Parameters:
*
* data [in] - The session handle.
* chlg64 [in] - Pointer to the base64 encoded challenge message.
* userp [in] - The user name.
* passdwp [in] - The user's password.
* service [in] - The service type such as www, smtp, pop or imap.
* outptr [in/out] - The address where a pointer to newly allocated memory
* holding the result will be stored upon completion.
* outlen [out] - The length of the output message.
*
* Returns CURLE_OK on success.
*/
CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
const char *chlg64,
const char *userp,
const char *passwdp,
const char *service,
char **outptr, size_t *outlen)
{
CURLcode result = CURLE_OK;
TCHAR *spn = NULL;
size_t chlglen = 0;
size_t resp_max = 0;
unsigned char *chlg = NULL;
unsigned char *resp = NULL;
CredHandle handle;
CtxtHandle ctx;
PSecPkgInfo SecurityPackage;
SEC_WINNT_AUTH_IDENTITY identity;
SecBuffer chlg_buf;
SecBuffer resp_buf;
SecBufferDesc chlg_desc;
SecBufferDesc resp_desc;
SECURITY_STATUS status;
unsigned long attrs;
TimeStamp tsDummy; /* For Windows 9x compatibility of SSPI calls */
/* Decode the base-64 encoded challenge message */
if(strlen(chlg64) && *chlg64 != '=') {
result = Curl_base64_decode(chlg64, &chlg, &chlglen);
if(result)
return result;
}
/* Ensure we have a valid challenge message */
if(!chlg)
return CURLE_BAD_CONTENT_ENCODING;
/* Ensure we have some login credientials as DigestSSP cannot use the current
Windows user like NTLMSSP can */
if(!userp || !*userp) {
Curl_safefree(chlg);
return CURLE_LOGIN_DENIED;
}
/* Query the security package for DigestSSP */
status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT("WDigest"),
&SecurityPackage);
if(status != SEC_E_OK) {
Curl_safefree(chlg);
return CURLE_NOT_BUILT_IN;
}
resp_max = SecurityPackage->cbMaxToken;
/* Release the package buffer as it is not required anymore */
s_pSecFn->FreeContextBuffer(SecurityPackage);
/* Allocate our response buffer */
resp = malloc(resp_max);
if(!resp) {
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Generate our SPN */
spn = Curl_sasl_build_spn(service, data->easy_conn->host.name);
if(!spn) {
Curl_safefree(resp);
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Populate our identity structure */
result = Curl_create_sspi_identity(userp, passwdp, &identity);
if(result) {
Curl_safefree(spn);
Curl_safefree(resp);
Curl_safefree(chlg);
return result;
}
/* Acquire our credientials handle */
status = s_pSecFn->AcquireCredentialsHandle(NULL,
(TCHAR *) TEXT("WDigest"),
SECPKG_CRED_OUTBOUND, NULL,
&identity, NULL, NULL,
&handle, &tsDummy);
if(status != SEC_E_OK) {
Curl_sspi_free_identity(&identity);
Curl_safefree(spn);
Curl_safefree(resp);
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Setup the challenge "input" security buffer */
chlg_desc.ulVersion = SECBUFFER_VERSION;
chlg_desc.cBuffers = 1;
chlg_desc.pBuffers = &chlg_buf;
chlg_buf.BufferType = SECBUFFER_TOKEN;
chlg_buf.pvBuffer = chlg;
chlg_buf.cbBuffer = curlx_uztoul(chlglen);
/* Setup the response "output" security buffer */
resp_desc.ulVersion = SECBUFFER_VERSION;
resp_desc.cBuffers = 1;
resp_desc.pBuffers = &resp_buf;
resp_buf.BufferType = SECBUFFER_TOKEN;
resp_buf.pvBuffer = resp;
resp_buf.cbBuffer = curlx_uztoul(resp_max);
/* Generate our challenge-response message */
status = s_pSecFn->InitializeSecurityContext(&handle, NULL, spn, 0, 0, 0,
&chlg_desc, 0, &ctx,
&resp_desc, &attrs, &tsDummy);
if(status == SEC_I_COMPLETE_AND_CONTINUE ||
status == SEC_I_CONTINUE_NEEDED)
s_pSecFn->CompleteAuthToken(&handle, &resp_desc);
else if(status != SEC_E_OK) {
s_pSecFn->FreeCredentialsHandle(&handle);
Curl_sspi_free_identity(&identity);
Curl_safefree(spn);
Curl_safefree(resp);
Curl_safefree(chlg);
return CURLE_RECV_ERROR;
}
/* Base64 encode the response */
result = Curl_base64_encode(data, (char *)resp, resp_buf.cbBuffer, outptr,
outlen);
/* Free our handles */
s_pSecFn->DeleteSecurityContext(&ctx);
s_pSecFn->FreeCredentialsHandle(&handle);
/* Free the identity structure */
Curl_sspi_free_identity(&identity);
/* Free the SPN */
Curl_safefree(spn);
/* Free the response buffer */
Curl_safefree(resp);
/* Free the decoeded challenge message */
Curl_safefree(chlg);
return result;
}
#endif /* !CURL_DISABLE_CRYPTO_AUTH */
/*
* Curl_sasl_create_gssapi_user_message()
*
* This is used to generate an already encoded GSSAPI (Kerberos V5) user token
* message ready for sending to the recipient.
*
* Parameters:
*
* data [in] - The session handle.
* userp [in] - The user name.
* passdwp [in] - The user's password.
* service [in] - The service type such as www, smtp, pop or imap.
* mutual [in] - Flag specifing whether or not mutual authentication is
* enabled.
* chlg64 [in] - Pointer to the optional base64 encoded challenge message.
* krb5 [in/out] - The gssapi data struct being used and modified.
* outptr [in/out] - The address where a pointer to newly allocated memory
* holding the result will be stored upon completion.
* outlen [out] - The length of the output message.
*
* Returns CURLE_OK on success.
*/
CURLcode Curl_sasl_create_gssapi_user_message(struct SessionHandle *data,
const char *userp,
const char *passwdp,
const char *service,
const bool mutual,
const char *chlg64,
struct kerberos5data *krb5,
char **outptr, size_t *outlen)
{
CURLcode result = CURLE_OK;
size_t chlglen = 0;
unsigned char *chlg = NULL;
CtxtHandle context;
PSecPkgInfo SecurityPackage;
SecBuffer chlg_buf;
SecBuffer resp_buf;
SecBufferDesc chlg_desc;
SecBufferDesc resp_desc;
SECURITY_STATUS status;
unsigned long attrs;
TimeStamp tsDummy; /* For Windows 9x compatibility of SSPI calls */
if(!krb5->credentials) {
/* Query the security package for Kerberos */
status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT("Kerberos"),
&SecurityPackage);
if(status != SEC_E_OK) {
return CURLE_NOT_BUILT_IN;
}
krb5->token_max = SecurityPackage->cbMaxToken;
/* Release the package buffer as it is not required anymore */
s_pSecFn->FreeContextBuffer(SecurityPackage);
/* Generate our SPN */
krb5->spn = Curl_sasl_build_spn(service, data->easy_conn->host.name);
if(!krb5->spn)
return CURLE_OUT_OF_MEMORY;
if(userp && *userp) {
/* Populate our identity structure */
result = Curl_create_sspi_identity(userp, passwdp, &krb5->identity);
if(result)
return result;
/* Allow proper cleanup of the identity structure */
krb5->p_identity = &krb5->identity;
/* Allocate our response buffer */
krb5->output_token = malloc(krb5->token_max);
if(!krb5->output_token)
return CURLE_OUT_OF_MEMORY;
}
else
/* Use the current Windows user */
krb5->p_identity = NULL;
/* Allocate our credentials handle */
krb5->credentials = malloc(sizeof(CredHandle));
if(!krb5->credentials)
return CURLE_OUT_OF_MEMORY;
memset(krb5->credentials, 0, sizeof(CredHandle));
/* Acquire our credientials handle */
status = s_pSecFn->AcquireCredentialsHandle(NULL,
(TCHAR *) TEXT("Kerberos"),
SECPKG_CRED_OUTBOUND, NULL,
krb5->p_identity, NULL, NULL,
krb5->credentials, &tsDummy);
if(status != SEC_E_OK)
return CURLE_OUT_OF_MEMORY;
/* Allocate our new context handle */
krb5->context = malloc(sizeof(CtxtHandle));
if(!krb5->context)
return CURLE_OUT_OF_MEMORY;
memset(krb5->context, 0, sizeof(CtxtHandle));
}
else {
/* Decode the base-64 encoded challenge message */
if(strlen(chlg64) && *chlg64 != '=') {
result = Curl_base64_decode(chlg64, &chlg, &chlglen);
if(result)
return result;
}
/* Ensure we have a valid challenge message */
if(!chlg)
return CURLE_BAD_CONTENT_ENCODING;
/* Setup the challenge "input" security buffer */
chlg_desc.ulVersion = SECBUFFER_VERSION;
chlg_desc.cBuffers = 1;
chlg_desc.pBuffers = &chlg_buf;
chlg_buf.BufferType = SECBUFFER_TOKEN;
chlg_buf.pvBuffer = chlg;
chlg_buf.cbBuffer = curlx_uztoul(chlglen);
}
/* Setup the response "output" security buffer */
resp_desc.ulVersion = SECBUFFER_VERSION;
resp_desc.cBuffers = 1;
resp_desc.pBuffers = &resp_buf;
resp_buf.BufferType = SECBUFFER_TOKEN;
resp_buf.pvBuffer = krb5->output_token;
resp_buf.cbBuffer = curlx_uztoul(krb5->token_max);
/* Generate our challenge-response message */
status = s_pSecFn->InitializeSecurityContext(krb5->credentials,
chlg ? krb5->context : NULL,
krb5->spn,
(mutual ?
ISC_REQ_MUTUAL_AUTH : 0),
0, SECURITY_NATIVE_DREP,
chlg ? &chlg_desc : NULL, 0,
&context,
&resp_desc, &attrs,
&tsDummy);
if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED)
return CURLE_RECV_ERROR;
if(memcmp(&context, krb5->context, sizeof(context))) {
s_pSecFn->DeleteSecurityContext(krb5->context);
memcpy(krb5->context, &context, sizeof(context));
}
if(resp_buf.cbBuffer) {
/* Base64 encode the response */
result = Curl_base64_encode(data, (char *)resp_buf.pvBuffer,
resp_buf.cbBuffer, outptr, outlen);
}
return result;
}
/*
* Curl_sasl_create_gssapi_security_message()
*
* This is used to generate an already encoded GSSAPI (Kerberos V5) security
* token message ready for sending to the recipient.
*
* Parameters:
*
* data [in] - The session handle.
* chlg64 [in] - Pointer to the optional base64 encoded challenge message.
* krb5 [in/out] - The gssapi data struct being used and modified.
* outptr [in/out] - The address where a pointer to newly allocated memory
* holding the result will be stored upon completion.
* outlen [out] - The length of the output message.
*
* Returns CURLE_OK on success.
*/
CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
const char *chlg64,
struct kerberos5data *krb5,
char **outptr,
size_t *outlen)
{
CURLcode result = CURLE_OK;
size_t offset = 0;
size_t chlglen = 0;
size_t messagelen = 0;
size_t appdatalen = 0;
unsigned char *chlg = NULL;
unsigned char *trailer = NULL;
unsigned char *message = NULL;
unsigned char *padding = NULL;
unsigned char *appdata = NULL;
SecBuffer input_buf[2];
SecBuffer wrap_buf[3];
SecBufferDesc input_desc;
SecBufferDesc wrap_desc;
unsigned long indata = 0;
unsigned long qop = 0;
unsigned long sec_layer = 0;
unsigned long max_size = 0;
SecPkgContext_Sizes sizes;
SecPkgCredentials_Names names;
SECURITY_STATUS status;
/* TODO: Verify the unicodeness of this function */
/* Decode the base-64 encoded input message */
if(strlen(chlg64) && *chlg64 != '=') {
result = Curl_base64_decode(chlg64, &chlg, &chlglen);
if(result)
return result;
}
/* Ensure we have a valid challenge message */
if(!chlg)
return CURLE_BAD_CONTENT_ENCODING;
/* Get our response size information */
status = s_pSecFn->QueryContextAttributes(krb5->context,
SECPKG_ATTR_SIZES,
&sizes);
if(status != SEC_E_OK) {
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Get the fully qualified username back from the context */
status = s_pSecFn->QueryCredentialsAttributes(krb5->credentials,
SECPKG_CRED_ATTR_NAMES,
&names);
if(status != SEC_E_OK) {
Curl_safefree(chlg);
return CURLE_RECV_ERROR;
}
/* Setup the "input" security buffer */
input_desc.ulVersion = SECBUFFER_VERSION;
input_desc.cBuffers = 2;
input_desc.pBuffers = input_buf;
input_buf[0].BufferType = SECBUFFER_STREAM;
input_buf[0].pvBuffer = chlg;
input_buf[0].cbBuffer = curlx_uztoul(chlglen);
input_buf[1].BufferType = SECBUFFER_DATA;
input_buf[1].pvBuffer = NULL;
input_buf[1].cbBuffer = 0;
/* Decrypt in the inbound challenge obtaining the qop */
status = s_pSecFn->DecryptMessage(krb5->context, &input_desc, 0, &qop);
if(status != SEC_E_OK) {
Curl_safefree(chlg);
return CURLE_RECV_ERROR;
}
/* Not 4 octets long to fail as per RFC4752 Section 3.1 */
if(input_buf[1].cbBuffer != 4) {
Curl_safefree(chlg);
return CURLE_RECV_ERROR;
}
/* Copy the data out into a coinput_bufnvenient variable and free the SSPI
allocated buffer as it is not required anymore */
memcpy(&indata, input_buf[1].pvBuffer, 4);
s_pSecFn->FreeContextBuffer(input_buf[1].pvBuffer);
/* Extract the security layer */
sec_layer = indata & 0x000000FF;
if(!(sec_layer & KERB_WRAP_NO_ENCRYPT)) {
Curl_safefree(chlg);
return CURLE_RECV_ERROR;
}
/* Extract the maximum message size the server can receive */
max_size = ntohl(indata & 0xFFFFFF00);
/* Allocate the trailer */
trailer = malloc(sizes.cbSecurityTrailer);
if(!trailer) {
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Allocate our message */
messagelen = 4 + strlen(names.sUserName) + 1;
message = malloc(messagelen);
if(!message) {
Curl_safefree(trailer);
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Populate the message with the security layer, client supported receive
message size (lets claim to support the same as the server) and
authorization identity including the 0x00 based terminator. Note: Dispite
RFC4752 Section 3.1 stating "The authorization identity is not terminated
with the zero-valued (%x00) octet." it seems necessary to include it. */
memcpy(message, &indata, 4);
strcpy((char *)message + 4, names.sUserName);
/* Allocate the padding */
padding = malloc(sizes.cbBlockSize);
if(!padding) {
Curl_safefree(message);
Curl_safefree(trailer);
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Setup the "authentication data" security buffer */
wrap_desc.ulVersion = SECBUFFER_VERSION;
wrap_desc.cBuffers = 3;
wrap_desc.pBuffers = wrap_buf;
wrap_buf[0].BufferType = SECBUFFER_TOKEN;
wrap_buf[0].pvBuffer = trailer;
wrap_buf[0].cbBuffer = sizes.cbSecurityTrailer;
wrap_buf[1].BufferType = SECBUFFER_DATA;
wrap_buf[1].pvBuffer = message;
wrap_buf[1].cbBuffer = curlx_uztoul(messagelen);
wrap_buf[2].BufferType = SECBUFFER_PADDING;
wrap_buf[2].pvBuffer = padding;
wrap_buf[2].cbBuffer = sizes.cbBlockSize;
/* Encrypt the data */
status = s_pSecFn->EncryptMessage(krb5->context, KERB_WRAP_NO_ENCRYPT,
&wrap_desc, 0);
if(status != SEC_E_OK) {
Curl_safefree(padding);
Curl_safefree(message);
Curl_safefree(trailer);
Curl_safefree(chlg);
return CURLE_RECV_ERROR;
}
/* Allocate the encryption (wrap) buffer */
appdatalen = wrap_buf[0].cbBuffer + wrap_buf[1].cbBuffer +
wrap_buf[2].cbBuffer;
appdata = malloc(appdatalen);
if(!appdata) {
Curl_safefree(padding);
Curl_safefree(message);
Curl_safefree(trailer);
Curl_safefree(chlg);
return CURLE_OUT_OF_MEMORY;
}
/* Populate the encryption buffer */
memcpy(appdata, wrap_buf[0].pvBuffer, wrap_buf[0].cbBuffer);
offset += wrap_buf[0].cbBuffer;
memcpy(appdata + offset, wrap_buf[1].pvBuffer, wrap_buf[1].cbBuffer);
offset += wrap_buf[1].cbBuffer;
memcpy(appdata + offset, wrap_buf[2].pvBuffer, wrap_buf[2].cbBuffer);
/* Base64 encode the response */
result = Curl_base64_encode(data, (char *)appdata, appdatalen, outptr,
outlen);
/* Free all of our local buffers */
Curl_safefree(appdata);
Curl_safefree(padding);
Curl_safefree(message);
Curl_safefree(trailer);
Curl_safefree(chlg);
return result;
}
void Curl_sasl_gssapi_cleanup(struct kerberos5data *krb5)
{
/* Free the context */
if(krb5->context) {
s_pSecFn->DeleteSecurityContext(krb5->context);
free(krb5->context);
krb5->context = NULL;
}
/* Free the credientials handle */
if(krb5->credentials) {
s_pSecFn->FreeCredentialsHandle(krb5->credentials);
free(krb5->credentials);
krb5->credentials = NULL;
}
/* Free our identity */
Curl_sspi_free_identity(krb5->p_identity);
krb5->p_identity = NULL;
/* Free the SPN and output token */
Curl_safefree(krb5->spn);
Curl_safefree(krb5->output_token);
/* Reset any variables */
krb5->token_max = 0;
}
#endif /* USE_WINDOWS_SSPI */
|