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  • Committer: Bazaar Package Importer
  • Author(s): Daniel T Chen
  • Date: 2005-12-04 09:55:18 UTC
  • mfrom: (1.1.2 upstream)
  • Revision ID: james.westby@ubuntu.com-20051204095518-h2u5t0nev2lvcp3p
Tags: 0.4.7-0ubuntu3
The "All hail the udev New World Order" release.

Convert rcS.d script to use /etc/network/if-p{ost-down,re-up}.d
instead. Remove the rcS.d script installed in 0.4.7-0ubuntu{1,2}.
If you manually modified /etc/network/interfaces to use the pre-up
and post-down directives with wpasupplicant, please remove them.
Thanks to Scott James Remnant for the guidance.

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tls_schannel.c
 
1
/*
 
2
 * WPA Supplicant / SSL/TLS interface functions for Microsoft Schannel
 
3
 * Copyright (c) 2005, Jouni Malinen <jkmaline@cc.hut.fi>
 
4
 *
 
5
 * This program is free software; you can redistribute it and/or modify
 
6
 * it under the terms of the GNU General Public License version 2 as
 
7
 * published by the Free Software Foundation.
 
8
 *
 
9
 * Alternatively, this software may be distributed under the terms of BSD
 
10
 * license.
 
11
 *
 
12
 * See README and COPYING for more details.
 
13
 */
 
14
 
 
15
/*
 
16
 * FIX: Go through all SSPI functions and verify what needs to be freed
 
17
 * FIX: session resumption
 
18
 * TODO: add support for server cert chain validation
 
19
 * TODO: add support for CA cert validation
 
20
 * TODO: add support for EAP-TLS (client cert/key conf)
 
21
 */
 
22
 
 
23
#include <stdlib.h>
 
24
#include <stdio.h>
 
25
#include <string.h>
 
26
#include <windows.h>
 
27
#include <wincrypt.h>
 
28
#include <schannel.h>
 
29
#define SECURITY_WIN32
 
30
#include <security.h>
 
31
#include <sspi.h>
 
32
 
 
33
#include "common.h"
 
34
#include "tls.h"
 
35
 
 
36
 
 
37
struct tls_global {
 
38
        HMODULE hsecurity;
 
39
        PSecurityFunctionTable sspi;
 
40
        HCERTSTORE my_cert_store;
 
41
};
 
42
 
 
43
struct tls_connection {
 
44
        int established, start;
 
45
        int failed, read_alerts, write_alerts;
 
46
 
 
47
        SCHANNEL_CRED schannel_cred;
 
48
        CredHandle creds;
 
49
        CtxtHandle context;
 
50
 
 
51
        u8 eap_tls_prf[128];
 
52
        int eap_tls_prf_set;
 
53
};
 
54
 
 
55
 
 
56
static int schannel_load_lib(struct tls_global *global)
 
57
{
 
58
        INIT_SECURITY_INTERFACE pInitSecurityInterface;
 
59
 
 
60
        global->hsecurity = LoadLibrary("Secur32.dll");
 
61
        if (global->hsecurity == NULL) {
 
62
                wpa_printf(MSG_ERROR, "%s: Could not load Secur32.dll - 0x%x",
 
63
                           __func__, (unsigned int) GetLastError());
 
64
                return -1;
 
65
        }
 
66
 
 
67
        pInitSecurityInterface = (INIT_SECURITY_INTERFACE) GetProcAddress(
 
68
                global->hsecurity, "InitSecurityInterfaceA");
 
69
        if (pInitSecurityInterface == NULL) {
 
70
                wpa_printf(MSG_ERROR, "%s: Could not find "
 
71
                           "InitSecurityInterfaceA from Secur32.dll",
 
72
                           __func__);
 
73
                FreeLibrary(global->hsecurity);
 
74
                global->hsecurity = NULL;
 
75
                return -1;
 
76
        }
 
77
 
 
78
        global->sspi = pInitSecurityInterface();
 
79
        if (global->sspi == NULL) {
 
80
                wpa_printf(MSG_ERROR, "%s: Could not read security "
 
81
                           "interface - 0x%x",
 
82
                           __func__, (unsigned int) GetLastError());
 
83
                FreeLibrary(global->hsecurity);
 
84
                global->hsecurity = NULL;
 
85
                return -1;
 
86
        }
 
87
 
 
88
        return 0;
 
89
}
 
90
 
 
91
 
 
92
void * tls_init(const struct tls_config *conf)
 
93
{
 
94
        struct tls_global *global;
 
95
 
 
96
        global = malloc(sizeof(*global));
 
97
        if (global == NULL)
 
98
                return NULL;
 
99
        memset(global, 0, sizeof(*global));
 
100
        if (schannel_load_lib(global)) {
 
101
                free(global);
 
102
                return NULL;
 
103
        }
 
104
        return global;
 
105
}
 
106
 
 
107
 
 
108
void tls_deinit(void *ssl_ctx)
 
109
{
 
110
        struct tls_global *global = ssl_ctx;
 
111
 
 
112
        if (global->my_cert_store)
 
113
                CertCloseStore(global->my_cert_store, 0);
 
114
        FreeLibrary(global->hsecurity);
 
115
        free(global);
 
116
}
 
117
 
 
118
 
 
119
int tls_get_errors(void *ssl_ctx)
 
120
{
 
121
        return 0;
 
122
}
 
123
 
 
124
 
 
125
struct tls_connection * tls_connection_init(void *ssl_ctx)
 
126
{
 
127
        struct tls_connection *conn;
 
128
 
 
129
        conn = malloc(sizeof(*conn));
 
130
        if (conn == NULL)
 
131
                return NULL;
 
132
        memset(conn, 0, sizeof(*conn));
 
133
        conn->start = 1;
 
134
 
 
135
        return conn;
 
136
}
 
137
 
 
138
 
 
139
void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
 
140
{
 
141
        if (conn == NULL)
 
142
                return;
 
143
 
 
144
        free(conn);
 
145
}
 
146
 
 
147
 
 
148
int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
 
149
{
 
150
        return conn ? conn->established : 0;
 
151
}
 
152
 
 
153
 
 
154
int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
 
155
{
 
156
        struct tls_global *global = ssl_ctx;
 
157
        if (conn == NULL)
 
158
                return -1;
 
159
 
 
160
        conn->eap_tls_prf_set = 0;
 
161
        conn->established = conn->failed = 0;
 
162
        conn->read_alerts = conn->write_alerts = 0;
 
163
        global->sspi->DeleteSecurityContext(&conn->context);
 
164
        /* FIX: what else needs to be reseted? */
 
165
 
 
166
        return 0;
 
167
}
 
168
 
 
169
 
 
170
int tls_global_ca_cert(void *_ssl_ctx, const char *ca_cert)
 
171
{
 
172
        return -1;
 
173
}
 
174
 
 
175
 
 
176
int tls_global_set_verify(void *ssl_ctx, int check_crl)
 
177
{
 
178
        return -1;
 
179
}
 
180
 
 
181
 
 
182
int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
 
183
                              int verify_peer)
 
184
{
 
185
        return -1;
 
186
}
 
187
 
 
188
 
 
189
int tls_global_client_cert(void *_ssl_ctx, const char *client_cert)
 
190
{
 
191
        return -1;
 
192
}
 
193
 
 
194
 
 
195
int tls_global_private_key(void *_ssl_ctx, const char *private_key,
 
196
                           const char *private_key_passwd)
 
197
{
 
198
        return -1;
 
199
}
 
200
 
 
201
 
 
202
int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
 
203
                            struct tls_keys *keys)
 
204
{
 
205
        if (conn == NULL || keys == NULL || !conn->eap_tls_prf_set)
 
206
                return -1;
 
207
 
 
208
        memset(keys, 0, sizeof(*keys));
 
209
 
 
210
        /*
 
211
         * Cannot get master_key from Schannel, but EapKeyBlock can be used to
 
212
         * generate session keys for EAP-TLS and EAP-PEAPv0. EAP-PEAPv2 and
 
213
         * EAP-TTLS cannot use this, though, since they are using different
 
214
         * labels. The only option could be to implement TLSv1 completely here
 
215
         * and just use Schannel or CryptoAPI for low-level crypto
 
216
         * functionality..
 
217
         */
 
218
        keys->eap_tls_prf = conn->eap_tls_prf;
 
219
        keys->eap_tls_prf_len = sizeof(conn->eap_tls_prf);
 
220
 
 
221
        return 0;
 
222
}
 
223
 
 
224
 
 
225
static u8 * tls_conn_hs_clienthello(struct tls_global *global,
 
226
                                    struct tls_connection *conn,
 
227
                                    size_t *out_len)
 
228
{
 
229
        DWORD sspi_flags, sspi_flags_out;
 
230
        SecBufferDesc outbuf;
 
231
        SecBuffer outbufs[1];
 
232
        SECURITY_STATUS status;
 
233
        TimeStamp ts_expiry;
 
234
 
 
235
        sspi_flags = ISC_REQ_REPLAY_DETECT |
 
236
                ISC_REQ_CONFIDENTIALITY |
 
237
                ISC_RET_EXTENDED_ERROR |
 
238
                ISC_REQ_ALLOCATE_MEMORY |
 
239
                ISC_REQ_MANUAL_CRED_VALIDATION;
 
240
 
 
241
        wpa_printf(MSG_DEBUG, "%s: Generating ClientHello", __func__);
 
242
 
 
243
        outbufs[0].pvBuffer = NULL;
 
244
        outbufs[0].BufferType = SECBUFFER_TOKEN;
 
245
        outbufs[0].cbBuffer = 0;
 
246
 
 
247
        outbuf.cBuffers = 1;
 
248
        outbuf.pBuffers = outbufs;
 
249
        outbuf.ulVersion = SECBUFFER_VERSION;
 
250
 
 
251
        status = global->sspi->InitializeSecurityContextA(
 
252
                &conn->creds, NULL, NULL /* server name */, sspi_flags, 0,
 
253
                SECURITY_NATIVE_DREP, NULL, 0, &conn->context,
 
254
                &outbuf, &sspi_flags_out, &ts_expiry);
 
255
        if (status != SEC_I_CONTINUE_NEEDED) {
 
256
                wpa_printf(MSG_ERROR, "%s: InitializeSecurityContextA "
 
257
                           "failed - 0x%x",
 
258
                           __func__, (unsigned int) status);
 
259
                return NULL;
 
260
        }
 
261
 
 
262
        if (outbufs[0].cbBuffer != 0 && outbufs[0].pvBuffer) {
 
263
                u8 *buf;
 
264
                wpa_hexdump(MSG_MSGDUMP, "SChannel - ClientHello",
 
265
                            outbufs[0].pvBuffer, outbufs[0].cbBuffer);
 
266
                conn->start = 0;
 
267
                *out_len = outbufs[0].cbBuffer;
 
268
                buf = malloc(*out_len);
 
269
                if (buf == NULL)
 
270
                        return NULL;
 
271
                memcpy(buf, outbufs[0].pvBuffer, *out_len);
 
272
                global->sspi->FreeContextBuffer(outbufs[0].pvBuffer);
 
273
                return buf;
 
274
        }
 
275
 
 
276
        wpa_printf(MSG_ERROR, "SChannel: Failed to generate ClientHello");
 
277
 
 
278
        return NULL;
 
279
}
 
280
 
 
281
 
 
282
#ifndef SECPKG_ATTR_EAP_KEY_BLOCK
 
283
#define SECPKG_ATTR_EAP_KEY_BLOCK 0x5b
 
284
 
 
285
typedef struct _SecPkgContext_EapKeyBlock {
 
286
        BYTE rgbKeys[128];
 
287
        BYTE rgbIVs[64];
 
288
} SecPkgContext_EapKeyBlock, *PSecPkgContext_EapKeyBlock;
 
289
#endif /* !SECPKG_ATTR_EAP_KEY_BLOCK */
 
290
 
 
291
static int tls_get_eap(struct tls_global *global, struct tls_connection *conn)
 
292
{
 
293
        SECURITY_STATUS status;
 
294
        SecPkgContext_EapKeyBlock kb;
 
295
 
 
296
        /* Note: Windows NT and Windows Me/98/95 do not support getting
 
297
         * EapKeyBlock */
 
298
 
 
299
        status = global->sspi->QueryContextAttributes(
 
300
                &conn->context, SECPKG_ATTR_EAP_KEY_BLOCK, &kb);
 
301
        if (status != SEC_E_OK) {
 
302
                wpa_printf(MSG_DEBUG, "%s: QueryContextAttributes("
 
303
                           "SECPKG_ATTR_EAP_KEY_BLOCK) failed (%d)",
 
304
                           __func__, (int) status);
 
305
                return -1;
 
306
        }
 
307
 
 
308
        wpa_hexdump_key(MSG_MSGDUMP, "Schannel - EapKeyBlock - rgbKeys",
 
309
                        kb.rgbKeys, sizeof(kb.rgbKeys));
 
310
        wpa_hexdump_key(MSG_MSGDUMP, "Schannel - EapKeyBlock - rgbIVs",
 
311
                        kb.rgbIVs, sizeof(kb.rgbIVs));
 
312
 
 
313
        memcpy(conn->eap_tls_prf, kb.rgbKeys, sizeof(kb.rgbKeys));
 
314
        conn->eap_tls_prf_set = 1;
 
315
}
 
316
 
 
317
 
 
318
u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
 
319
                              const u8 *in_data, size_t in_len,
 
320
                              size_t *out_len)
 
321
{
 
322
        struct tls_global *global = ssl_ctx;
 
323
        DWORD sspi_flags, sspi_flags_out;
 
324
        SecBufferDesc inbuf, outbuf;
 
325
        SecBuffer inbufs[2], outbufs[1];
 
326
        SECURITY_STATUS status;
 
327
        TimeStamp ts_expiry;
 
328
        u8 *out_buf = NULL;
 
329
 
 
330
        if (conn->start) {
 
331
                return tls_conn_hs_clienthello(global, conn, out_len);
 
332
        }
 
333
 
 
334
        wpa_printf(MSG_DEBUG, "SChannel: %d bytes handshake data to process",
 
335
                   in_len);
 
336
 
 
337
        sspi_flags = ISC_REQ_REPLAY_DETECT |
 
338
                ISC_REQ_CONFIDENTIALITY |
 
339
                ISC_RET_EXTENDED_ERROR |
 
340
                ISC_REQ_ALLOCATE_MEMORY |
 
341
                ISC_REQ_MANUAL_CRED_VALIDATION;
 
342
 
 
343
        /* Input buffer for Schannel */
 
344
        inbufs[0].pvBuffer = (u8 *) in_data;
 
345
        inbufs[0].cbBuffer = in_len;
 
346
        inbufs[0].BufferType = SECBUFFER_TOKEN;
 
347
 
 
348
        /* Place for leftover data from Schannel */
 
349
        inbufs[1].pvBuffer = NULL;
 
350
        inbufs[1].cbBuffer = 0;
 
351
        inbufs[1].BufferType = SECBUFFER_EMPTY;
 
352
 
 
353
        inbuf.cBuffers = 2;
 
354
        inbuf.pBuffers = inbufs;
 
355
        inbuf.ulVersion = SECBUFFER_VERSION;
 
356
 
 
357
        /* Output buffer for Schannel */
 
358
        outbufs[0].pvBuffer = NULL;
 
359
        outbufs[0].cbBuffer = 0;
 
360
        outbufs[0].BufferType = SECBUFFER_TOKEN;
 
361
 
 
362
        outbuf.cBuffers = 1;
 
363
        outbuf.pBuffers = outbufs;
 
364
        outbuf.ulVersion = SECBUFFER_VERSION;
 
365
 
 
366
        status = global->sspi->InitializeSecurityContextA(
 
367
                &conn->creds, &conn->context, NULL, sspi_flags, 0,
 
368
                SECURITY_NATIVE_DREP, &inbuf, 0, NULL,
 
369
                &outbuf, &sspi_flags_out, &ts_expiry);
 
370
 
 
371
        wpa_printf(MSG_MSGDUMP, "Schannel: InitializeSecurityContextA -> "
 
372
                   "status=%d inlen[0]=%d intype[0]=%d inlen[1]=%d "
 
373
                   "intype[1]=%d outlen[0]=%d",
 
374
                   (int) status, (int) inbufs[0].cbBuffer,
 
375
                   (int) inbufs[0].BufferType, (int) inbufs[1].cbBuffer,
 
376
                   (int) inbufs[1].BufferType,
 
377
                   (int) outbufs[0].cbBuffer);
 
378
        if (status == SEC_E_OK || status == SEC_I_CONTINUE_NEEDED ||
 
379
            (FAILED(status) && (sspi_flags_out & ISC_RET_EXTENDED_ERROR))) {
 
380
                if (outbufs[0].cbBuffer != 0 && outbufs[0].pvBuffer) {
 
381
                        wpa_hexdump(MSG_MSGDUMP, "SChannel - output",
 
382
                                    outbufs[0].pvBuffer, outbufs[0].cbBuffer);
 
383
                        *out_len = outbufs[0].cbBuffer;
 
384
                        out_buf = malloc(*out_len);
 
385
                        if (out_buf == NULL)
 
386
                                return NULL;
 
387
                        memcpy(out_buf, outbufs[0].pvBuffer, *out_len);
 
388
                        global->sspi->FreeContextBuffer(outbufs[0].pvBuffer);
 
389
                        outbufs[0].pvBuffer = NULL;
 
390
                }
 
391
        }
 
392
 
 
393
        switch (status) {
 
394
        case SEC_E_INCOMPLETE_MESSAGE:
 
395
                wpa_printf(MSG_DEBUG, "Schannel: SEC_E_INCOMPLETE_MESSAGE");
 
396
                break;
 
397
        case SEC_I_CONTINUE_NEEDED:
 
398
                wpa_printf(MSG_DEBUG, "Schannel: SEC_I_CONTINUE_NEEDED");
 
399
                break;
 
400
        case SEC_E_OK:
 
401
                /* TODO: verify server certificate chain */
 
402
                wpa_printf(MSG_DEBUG, "Schannel: SEC_E_OK - Handshake "
 
403
                           "completed successfully");
 
404
                conn->established = 1;
 
405
                tls_get_eap(global, conn);
 
406
 
 
407
                /* Need to return something to get final TLS ACK. */
 
408
                if (out_buf == NULL)
 
409
                        out_buf = malloc(1);
 
410
 
 
411
                if (inbufs[1].BufferType == SECBUFFER_EXTRA) {
 
412
                        wpa_hexdump(MSG_MSGDUMP, "SChannel - Encrypted "
 
413
                                    "application data",
 
414
                                    inbufs[1].pvBuffer, inbufs[1].cbBuffer);
 
415
                        /* FIX: need to fix TLS API to allow this data to be
 
416
                         * passed to the caller */
 
417
                        global->sspi->FreeContextBuffer(inbufs[1].pvBuffer);
 
418
                        inbufs[1].pvBuffer = NULL;
 
419
                }
 
420
                break;
 
421
        case SEC_I_INCOMPLETE_CREDENTIALS:
 
422
                wpa_printf(MSG_DEBUG,
 
423
                           "Schannel: SEC_I_INCOMPLETE_CREDENTIALS");
 
424
                break;
 
425
        case SEC_E_WRONG_PRINCIPAL:
 
426
                wpa_printf(MSG_DEBUG, "Schannel: SEC_E_WRONG_PRINCIPAL");
 
427
                break;
 
428
        case SEC_E_INTERNAL_ERROR:
 
429
                wpa_printf(MSG_DEBUG, "Schannel: SEC_E_INTERNAL_ERROR");
 
430
                break;
 
431
        }
 
432
 
 
433
        if (FAILED(status)) {
 
434
                wpa_printf(MSG_DEBUG, "Schannel: Handshake failed "
 
435
                           "(out_buf=%p)", out_buf);
 
436
                conn->failed++;
 
437
                global->sspi->DeleteSecurityContext(&conn->context);
 
438
                return out_buf;
 
439
        }
 
440
 
 
441
        if (inbufs[1].BufferType == SECBUFFER_EXTRA) {
 
442
                /* TODO: Can this happen? What to do with this data? */
 
443
                wpa_hexdump(MSG_MSGDUMP, "SChannel - Leftover data",
 
444
                            inbufs[1].pvBuffer, inbufs[1].cbBuffer);
 
445
                global->sspi->FreeContextBuffer(inbufs[1].pvBuffer);
 
446
                inbufs[1].pvBuffer = NULL;
 
447
        }
 
448
 
 
449
        return out_buf;
 
450
}
 
451
 
 
452
 
 
453
u8 * tls_connection_server_handshake(void *ssl_ctx,
 
454
                                     struct tls_connection *conn,
 
455
                                     const u8 *in_data, size_t in_len,
 
456
                                     size_t *out_len)
 
457
{
 
458
        return NULL;
 
459
}
 
460
 
 
461
 
 
462
int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
 
463
                           const u8 *in_data, size_t in_len,
 
464
                           u8 *out_data, size_t out_len)
 
465
{
 
466
        struct tls_global *global = ssl_ctx;
 
467
        SECURITY_STATUS status;
 
468
        SecBufferDesc buf;
 
469
        SecBuffer bufs[4];
 
470
        SecPkgContext_StreamSizes sizes;
 
471
        int i;
 
472
        size_t total_len;
 
473
 
 
474
        status = global->sspi->QueryContextAttributes(&conn->context,
 
475
                                                      SECPKG_ATTR_STREAM_SIZES,
 
476
                                                      &sizes);
 
477
        if (status != SEC_E_OK) {
 
478
                wpa_printf(MSG_DEBUG, "%s: QueryContextAttributes failed",
 
479
                           __func__);
 
480
                return -1;
 
481
        }
 
482
        wpa_printf(MSG_DEBUG, "%s: Stream sizes: header=%u trailer=%u",
 
483
                   __func__,
 
484
                   (unsigned int) sizes.cbHeader,
 
485
                   (unsigned int) sizes.cbTrailer);
 
486
 
 
487
        total_len = sizes.cbHeader + in_len + sizes.cbTrailer;
 
488
 
 
489
        if (out_len < total_len) {
 
490
                wpa_printf(MSG_DEBUG, "%s: too short out_data (out_len=%lu "
 
491
                           "in_len=%lu total_len=%lu)", __func__,
 
492
                           (unsigned long) out_len, (unsigned long) in_len,
 
493
                           (unsigned long) total_len);
 
494
                return -1;
 
495
        }
 
496
 
 
497
        memset(&bufs, 0, sizeof(bufs));
 
498
        bufs[0].pvBuffer = out_data;
 
499
        bufs[0].cbBuffer = sizes.cbHeader;
 
500
        bufs[0].BufferType = SECBUFFER_STREAM_HEADER;
 
501
 
 
502
        memcpy(out_data + sizes.cbHeader, in_data, in_len);
 
503
        bufs[1].pvBuffer = out_data + sizes.cbHeader;
 
504
        bufs[1].cbBuffer = in_len;
 
505
        bufs[1].BufferType = SECBUFFER_DATA;
 
506
 
 
507
        bufs[2].pvBuffer = out_data + sizes.cbHeader + in_len;
 
508
        bufs[2].cbBuffer = sizes.cbTrailer;
 
509
        bufs[2].BufferType = SECBUFFER_STREAM_TRAILER;
 
510
 
 
511
        buf.ulVersion = SECBUFFER_VERSION;
 
512
        buf.cBuffers = 3;
 
513
        buf.pBuffers = bufs;
 
514
 
 
515
        status = global->sspi->EncryptMessage(&conn->context, 0, &buf, 0);
 
516
 
 
517
        wpa_printf(MSG_MSGDUMP, "Schannel: EncryptMessage -> "
 
518
                   "status=%d len[0]=%d type[0]=%d len[1]=%d type[1]=%d "
 
519
                   "len[2]=%d type[2]=%d",
 
520
                   (int) status,
 
521
                   (int) bufs[0].cbBuffer, (int) bufs[0].BufferType,
 
522
                   (int) bufs[1].cbBuffer, (int) bufs[1].BufferType,
 
523
                   (int) bufs[2].cbBuffer, (int) bufs[2].BufferType);
 
524
        wpa_printf(MSG_MSGDUMP, "Schannel: EncryptMessage pointers: "
 
525
                   "out_data=%p bufs %p %p %p",
 
526
                   out_data, bufs[0].pvBuffer, bufs[1].pvBuffer,
 
527
                   bufs[2].pvBuffer);
 
528
 
 
529
        for (i = 0; i < 3; i++) {
 
530
                if (bufs[i].pvBuffer && bufs[i].BufferType != SECBUFFER_EMPTY)
 
531
                {
 
532
                        wpa_hexdump(MSG_MSGDUMP, "SChannel: bufs",
 
533
                                    bufs[i].pvBuffer, bufs[i].cbBuffer);
 
534
                }
 
535
        }
 
536
 
 
537
        if (status == SEC_E_OK) {
 
538
                wpa_printf(MSG_DEBUG, "%s: SEC_E_OK", __func__);
 
539
                wpa_hexdump_key(MSG_MSGDUMP, "Schannel: Encrypted data from "
 
540
                                "EncryptMessage", out_data, total_len);
 
541
                return total_len;
 
542
        }
 
543
 
 
544
        wpa_printf(MSG_DEBUG, "%s: Failed - status=%d",
 
545
                   __func__, (int) status);
 
546
        return -1;
 
547
}
 
548
 
 
549
 
 
550
int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
 
551
                           const u8 *in_data, size_t in_len,
 
552
                           u8 *out_data, size_t out_len)
 
553
{
 
554
        struct tls_global *global = ssl_ctx;
 
555
        SECURITY_STATUS status;
 
556
        SecBufferDesc buf;
 
557
        SecBuffer bufs[4];
 
558
        int i;
 
559
 
 
560
        if (out_len < in_len) {
 
561
                wpa_printf(MSG_DEBUG, "%s: out_len=%lu < in_len=%lu", __func__,
 
562
                           (unsigned long) out_len, (unsigned long) in_len);
 
563
                return -1;
 
564
        }
 
565
 
 
566
        wpa_hexdump(MSG_MSGDUMP, "Schannel: Encrypted data to DecryptMessage",
 
567
                    in_data, in_len);
 
568
        memset(&bufs, 0, sizeof(bufs));
 
569
        memcpy(out_data, in_data, in_len);
 
570
        bufs[0].pvBuffer = out_data;
 
571
        bufs[0].cbBuffer = in_len;
 
572
        bufs[0].BufferType = SECBUFFER_DATA;
 
573
 
 
574
        bufs[1].BufferType = SECBUFFER_EMPTY;
 
575
        bufs[2].BufferType = SECBUFFER_EMPTY;
 
576
        bufs[3].BufferType = SECBUFFER_EMPTY;
 
577
 
 
578
        buf.ulVersion = SECBUFFER_VERSION;
 
579
        buf.cBuffers = 4;
 
580
        buf.pBuffers = bufs;
 
581
 
 
582
        status = global->sspi->DecryptMessage(&conn->context, &buf, 0,
 
583
                                                    NULL);
 
584
        wpa_printf(MSG_MSGDUMP, "Schannel: DecryptMessage -> "
 
585
                   "status=%d len[0]=%d type[0]=%d len[1]=%d type[1]=%d "
 
586
                   "len[2]=%d type[2]=%d len[3]=%d type[3]=%d",
 
587
                   (int) status,
 
588
                   (int) bufs[0].cbBuffer, (int) bufs[0].BufferType,
 
589
                   (int) bufs[1].cbBuffer, (int) bufs[1].BufferType,
 
590
                   (int) bufs[2].cbBuffer, (int) bufs[2].BufferType,
 
591
                   (int) bufs[3].cbBuffer, (int) bufs[3].BufferType);
 
592
        wpa_printf(MSG_MSGDUMP, "Schannel: DecryptMessage pointers: "
 
593
                   "out_data=%p bufs %p %p %p %p",
 
594
                   out_data, bufs[0].pvBuffer, bufs[1].pvBuffer,
 
595
                   bufs[2].pvBuffer, bufs[3].pvBuffer);
 
596
 
 
597
        switch (status) {
 
598
        case SEC_E_INCOMPLETE_MESSAGE:
 
599
                wpa_printf(MSG_DEBUG, "%s: SEC_E_INCOMPLETE_MESSAGE",
 
600
                           __func__);
 
601
                break;
 
602
        case SEC_E_OK:
 
603
                wpa_printf(MSG_DEBUG, "%s: SEC_E_OK", __func__);
 
604
                for (i = 0; i < 4; i++) {
 
605
                        if (bufs[i].BufferType == SECBUFFER_DATA)
 
606
                                break;
 
607
                }
 
608
                if (i == 4) {
 
609
                        wpa_printf(MSG_DEBUG, "%s: No output data from "
 
610
                                   "DecryptMessage", __func__);
 
611
                        return -1;
 
612
                }
 
613
                wpa_hexdump_key(MSG_MSGDUMP, "Schannel: Decrypted data from "
 
614
                                "DecryptMessage",
 
615
                                bufs[i].pvBuffer, bufs[i].cbBuffer);
 
616
                if (bufs[i].cbBuffer > out_len) {
 
617
                        wpa_printf(MSG_DEBUG, "%s: Too long output data",
 
618
                                   __func__);
 
619
                        return -1;
 
620
                }
 
621
                memmove(out_data, bufs[i].pvBuffer, bufs[i].cbBuffer);
 
622
                return bufs[i].cbBuffer;
 
623
        }
 
624
 
 
625
        wpa_printf(MSG_DEBUG, "%s: Failed - status=%d",
 
626
                   __func__, (int) status);
 
627
        return -1;
 
628
}
 
629
 
 
630
 
 
631
int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
 
632
{
 
633
        return 0;
 
634
}
 
635
 
 
636
 
 
637
#ifdef EAP_FAST
 
638
int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn,
 
639
                                  const u8 *key, size_t key_len)
 
640
{
 
641
        return -1;
 
642
}
 
643
#endif /* EAP_FAST */
 
644
 
 
645
 
 
646
int tls_connection_set_anon_dh(void *ssl_ctx, struct tls_connection *conn)
 
647
{
 
648
        return -1;
 
649
}
 
650
 
 
651
 
 
652
int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
 
653
                   char *buf, size_t buflen)
 
654
{
 
655
        return -1;
 
656
}
 
657
 
 
658
 
 
659
int tls_connection_enable_workaround(void *ssl_ctx,
 
660
                                     struct tls_connection *conn)
 
661
{
 
662
        return 0;
 
663
}
 
664
 
 
665
 
 
666
#ifdef EAP_FAST
 
667
/* ClientHello TLS extensions require a patch to openssl, so this function is
 
668
 * commented out unless explicitly needed for EAP-FAST in order to be able to
 
669
 * build this file with unmodified openssl. */
 
670
int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
 
671
                                    int ext_type, const u8 *data,
 
672
                                    size_t data_len)
 
673
{
 
674
        return -1;
 
675
}
 
676
#endif /* EAP_FAST */
 
677
 
 
678
 
 
679
int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
 
680
{
 
681
        if (conn == NULL)
 
682
                return -1;
 
683
        return conn->failed;
 
684
}
 
685
 
 
686
 
 
687
int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
 
688
{
 
689
        if (conn == NULL)
 
690
                return -1;
 
691
        return conn->read_alerts;
 
692
}
 
693
 
 
694
 
 
695
int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
 
696
{
 
697
        if (conn == NULL)
 
698
                return -1;
 
699
        return conn->write_alerts;
 
700
}
 
701
 
 
702
 
 
703
int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
 
704
                              const struct tls_connection_params *params)
 
705
{
 
706
        struct tls_global *global = tls_ctx;
 
707
        ALG_ID algs[1];
 
708
        SECURITY_STATUS status;
 
709
        TimeStamp ts_expiry;
 
710
 
 
711
        if (conn == NULL)
 
712
                return -1;
 
713
 
 
714
        if (global->my_cert_store == NULL &&
 
715
            (global->my_cert_store = CertOpenSystemStore(0, "MY")) == NULL) {
 
716
                wpa_printf(MSG_ERROR, "%s: CertOpenSystemStore failed - 0x%x",
 
717
                           __func__, (unsigned int) GetLastError());
 
718
                return -1;
 
719
        }
 
720
 
 
721
        memset(&conn->schannel_cred, 0, sizeof(conn->schannel_cred));
 
722
        conn->schannel_cred.dwVersion = SCHANNEL_CRED_VERSION;
 
723
        conn->schannel_cred.grbitEnabledProtocols = SP_PROT_TLS1;
 
724
        algs[0] = CALG_RSA_KEYX;
 
725
        conn->schannel_cred.cSupportedAlgs = 1;
 
726
        conn->schannel_cred.palgSupportedAlgs = algs;
 
727
        conn->schannel_cred.dwFlags |= SCH_CRED_NO_DEFAULT_CREDS;
 
728
        status = global->sspi->AcquireCredentialsHandleA(
 
729
                NULL, UNISP_NAME_A, SECPKG_CRED_OUTBOUND, NULL,
 
730
                &conn->schannel_cred, NULL, NULL, &conn->creds, &ts_expiry);
 
731
        if (status != SEC_E_OK) {
 
732
                wpa_printf(MSG_DEBUG, "%s: AcquireCredentialsHandleA failed - "
 
733
                           "0x%x", __func__, (unsigned int) status);
 
734
                return -1;
 
735
        }
 
736
 
 
737
        return 0;
 
738
}