summaryrefslogtreecommitdiffstats
path: root/security/nss/gtests/ssl_gtest/libssl_internals.c
blob: 17b4ffe49a50934fe473dffc565f75a52c29c974 (plain)
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
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

/* This file contains functions for frobbing the internals of libssl */
#include "libssl_internals.h"

#include "nss.h"
#include "pk11pub.h"
#include "seccomon.h"
#include "selfencrypt.h"

SECStatus SSLInt_IncrementClientHandshakeVersion(PRFileDesc *fd) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }

  ++ss->clientHelloVersion;

  return SECSuccess;
}

/* Use this function to update the ClientRandom of a client's handshake state
 * after replacing its ClientHello message. We for example need to do this
 * when replacing an SSLv3 ClientHello with its SSLv2 equivalent. */
SECStatus SSLInt_UpdateSSLv2ClientRandom(PRFileDesc *fd, uint8_t *rnd,
                                         size_t rnd_len, uint8_t *msg,
                                         size_t msg_len) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }

  ssl3_RestartHandshakeHashes(ss);

  // Ensure we don't overrun hs.client_random.
  rnd_len = PR_MIN(SSL3_RANDOM_LENGTH, rnd_len);

  // Zero the client_random.
  PORT_Memset(ss->ssl3.hs.client_random, 0, SSL3_RANDOM_LENGTH);

  // Copy over the challenge bytes.
  size_t offset = SSL3_RANDOM_LENGTH - rnd_len;
  PORT_Memcpy(ss->ssl3.hs.client_random + offset, rnd, rnd_len);

  // Rehash the SSLv2 client hello message.
  return ssl3_UpdateHandshakeHashes(ss, msg, msg_len);
}

PRBool SSLInt_ExtensionNegotiated(PRFileDesc *fd, PRUint16 ext) {
  sslSocket *ss = ssl_FindSocket(fd);
  return (PRBool)(ss && ssl3_ExtensionNegotiated(ss, ext));
}

void SSLInt_ClearSelfEncryptKey() { ssl_ResetSelfEncryptKeys(); }

sslSelfEncryptKeys *ssl_GetSelfEncryptKeysInt();

void SSLInt_SetSelfEncryptMacKey(PK11SymKey *key) {
  sslSelfEncryptKeys *keys = ssl_GetSelfEncryptKeysInt();

  PK11_FreeSymKey(keys->macKey);
  keys->macKey = key;
}

SECStatus SSLInt_SetMTU(PRFileDesc *fd, PRUint16 mtu) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }
  ss->ssl3.mtu = mtu;
  ss->ssl3.hs.rtRetries = 0; /* Avoid DTLS shrinking the MTU any more. */
  return SECSuccess;
}

PRInt32 SSLInt_CountCipherSpecs(PRFileDesc *fd) {
  PRCList *cur_p;
  PRInt32 ct = 0;

  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return -1;
  }

  for (cur_p = PR_NEXT_LINK(&ss->ssl3.hs.cipherSpecs);
       cur_p != &ss->ssl3.hs.cipherSpecs; cur_p = PR_NEXT_LINK(cur_p)) {
    ++ct;
  }
  return ct;
}

void SSLInt_PrintCipherSpecs(const char *label, PRFileDesc *fd) {
  PRCList *cur_p;

  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return;
  }

  fprintf(stderr, "Cipher specs for %s\n", label);
  for (cur_p = PR_NEXT_LINK(&ss->ssl3.hs.cipherSpecs);
       cur_p != &ss->ssl3.hs.cipherSpecs; cur_p = PR_NEXT_LINK(cur_p)) {
    ssl3CipherSpec *spec = (ssl3CipherSpec *)cur_p;
    fprintf(stderr, "  %s spec epoch=%d (%s) refct=%d\n", SPEC_DIR(spec),
            spec->epoch, spec->phase, spec->refCt);
  }
}

/* Force a timer expiry by backdating when all active timers were started. We
 * could set the remaining time to 0 but then backoff would not work properly if
 * we decide to test it. */
SECStatus SSLInt_ShiftDtlsTimers(PRFileDesc *fd, PRIntervalTime shift) {
  size_t i;
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }

  for (i = 0; i < PR_ARRAY_SIZE(ss->ssl3.hs.timers); ++i) {
    if (ss->ssl3.hs.timers[i].cb) {
      ss->ssl3.hs.timers[i].started -= shift;
    }
  }
  return SECSuccess;
}

#define CHECK_SECRET(secret)                  \
  if (ss->ssl3.hs.secret) {                   \
    fprintf(stderr, "%s != NULL\n", #secret); \
    return PR_FALSE;                          \
  }

PRBool SSLInt_CheckSecretsDestroyed(PRFileDesc *fd) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return PR_FALSE;
  }

  CHECK_SECRET(currentSecret);
  CHECK_SECRET(dheSecret);
  CHECK_SECRET(clientEarlyTrafficSecret);
  CHECK_SECRET(clientHsTrafficSecret);
  CHECK_SECRET(serverHsTrafficSecret);

  return PR_TRUE;
}

PRBool sslint_DamageTrafficSecret(PRFileDesc *fd, size_t offset) {
  unsigned char data[32] = {0};
  PK11SymKey **keyPtr;
  PK11SlotInfo *slot = PK11_GetInternalSlot();
  SECItem key_item = {siBuffer, data, sizeof(data)};
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return PR_FALSE;
  }
  if (!slot) {
    return PR_FALSE;
  }
  keyPtr = (PK11SymKey **)((char *)&ss->ssl3.hs + offset);
  if (!*keyPtr) {
    return PR_FALSE;
  }
  PK11_FreeSymKey(*keyPtr);
  *keyPtr = PK11_ImportSymKey(slot, CKM_NSS_HKDF_SHA256, PK11_OriginUnwrap,
                              CKA_DERIVE, &key_item, NULL);
  PK11_FreeSlot(slot);
  if (!*keyPtr) {
    return PR_FALSE;
  }

  return PR_TRUE;
}

PRBool SSLInt_DamageClientHsTrafficSecret(PRFileDesc *fd) {
  return sslint_DamageTrafficSecret(
      fd, offsetof(SSL3HandshakeState, clientHsTrafficSecret));
}

PRBool SSLInt_DamageServerHsTrafficSecret(PRFileDesc *fd) {
  return sslint_DamageTrafficSecret(
      fd, offsetof(SSL3HandshakeState, serverHsTrafficSecret));
}

PRBool SSLInt_DamageEarlyTrafficSecret(PRFileDesc *fd) {
  return sslint_DamageTrafficSecret(
      fd, offsetof(SSL3HandshakeState, clientEarlyTrafficSecret));
}

SECStatus SSLInt_Set0RttAlpn(PRFileDesc *fd, PRUint8 *data, unsigned int len) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }

  ss->xtnData.nextProtoState = SSL_NEXT_PROTO_EARLY_VALUE;
  if (ss->xtnData.nextProto.data) {
    SECITEM_FreeItem(&ss->xtnData.nextProto, PR_FALSE);
  }
  if (!SECITEM_AllocItem(NULL, &ss->xtnData.nextProto, len)) {
    return SECFailure;
  }
  PORT_Memcpy(ss->xtnData.nextProto.data, data, len);

  return SECSuccess;
}

PRBool SSLInt_HasCertWithAuthType(PRFileDesc *fd, SSLAuthType authType) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return PR_FALSE;
  }

  return (PRBool)(!!ssl_FindServerCert(ss, authType, NULL));
}

PRBool SSLInt_SendAlert(PRFileDesc *fd, uint8_t level, uint8_t type) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss) {
    return PR_FALSE;
  }

  SECStatus rv = SSL3_SendAlert(ss, level, type);
  if (rv != SECSuccess) return PR_FALSE;

  return PR_TRUE;
}

SECStatus SSLInt_AdvanceReadSeqNum(PRFileDesc *fd, PRUint64 to) {
  sslSocket *ss;
  ssl3CipherSpec *spec;

  ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }
  if (to >= RECORD_SEQ_MAX) {
    PORT_SetError(SEC_ERROR_INVALID_ARGS);
    return SECFailure;
  }
  ssl_GetSpecWriteLock(ss);
  spec = ss->ssl3.crSpec;
  spec->seqNum = to;

  /* For DTLS, we need to fix the record sequence number.  For this, we can just
   * scrub the entire structure on the assumption that the new sequence number
   * is far enough past the last received sequence number. */
  if (spec->seqNum <= spec->recvdRecords.right + DTLS_RECVD_RECORDS_WINDOW) {
    PORT_SetError(SEC_ERROR_INVALID_ARGS);
    return SECFailure;
  }
  dtls_RecordSetRecvd(&spec->recvdRecords, spec->seqNum);

  ssl_ReleaseSpecWriteLock(ss);
  return SECSuccess;
}

SECStatus SSLInt_AdvanceWriteSeqNum(PRFileDesc *fd, PRUint64 to) {
  sslSocket *ss;

  ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }
  if (to >= RECORD_SEQ_MAX) {
    PORT_SetError(SEC_ERROR_INVALID_ARGS);
    return SECFailure;
  }
  ssl_GetSpecWriteLock(ss);
  ss->ssl3.cwSpec->seqNum = to;
  ssl_ReleaseSpecWriteLock(ss);
  return SECSuccess;
}

SECStatus SSLInt_AdvanceWriteSeqByAWindow(PRFileDesc *fd, PRInt32 extra) {
  sslSocket *ss;
  sslSequenceNumber to;

  ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }
  ssl_GetSpecReadLock(ss);
  to = ss->ssl3.cwSpec->seqNum + DTLS_RECVD_RECORDS_WINDOW + extra;
  ssl_ReleaseSpecReadLock(ss);
  return SSLInt_AdvanceWriteSeqNum(fd, to);
}

SSLKEAType SSLInt_GetKEAType(SSLNamedGroup group) {
  const sslNamedGroupDef *groupDef = ssl_LookupNamedGroup(group);
  if (!groupDef) return ssl_kea_null;

  return groupDef->keaType;
}

SECStatus SSLInt_SetCipherSpecChangeFunc(PRFileDesc *fd,
                                         sslCipherSpecChangedFunc func,
                                         void *arg) {
  sslSocket *ss;

  ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }

  ss->ssl3.changedCipherSpecFunc = func;
  ss->ssl3.changedCipherSpecArg = arg;

  return SECSuccess;
}

PK11SymKey *SSLInt_CipherSpecToKey(const ssl3CipherSpec *spec) {
  return spec->keyMaterial.key;
}

SSLCipherAlgorithm SSLInt_CipherSpecToAlgorithm(const ssl3CipherSpec *spec) {
  return spec->cipherDef->calg;
}

const PRUint8 *SSLInt_CipherSpecToIv(const ssl3CipherSpec *spec) {
  return spec->keyMaterial.iv;
}

PRUint16 SSLInt_CipherSpecToEpoch(const ssl3CipherSpec *spec) {
  return spec->epoch;
}

void SSLInt_SetTicketLifetime(uint32_t lifetime) {
  ssl_ticket_lifetime = lifetime;
}

SECStatus SSLInt_SetSocketMaxEarlyDataSize(PRFileDesc *fd, uint32_t size) {
  sslSocket *ss;

  ss = ssl_FindSocket(fd);
  if (!ss) {
    return SECFailure;
  }

  /* This only works when resuming. */
  if (!ss->statelessResume) {
    PORT_SetError(SEC_INTERNAL_ONLY);
    return SECFailure;
  }

  /* Modifying both specs allows this to be used on either peer. */
  ssl_GetSpecWriteLock(ss);
  ss->ssl3.crSpec->earlyDataRemaining = size;
  ss->ssl3.cwSpec->earlyDataRemaining = size;
  ssl_ReleaseSpecWriteLock(ss);

  return SECSuccess;
}

void SSLInt_RolloverAntiReplay(void) {
  tls13_AntiReplayRollover(ssl_TimeUsec());
}

SECStatus SSLInt_GetEpochs(PRFileDesc *fd, PRUint16 *readEpoch,
                           PRUint16 *writeEpoch) {
  sslSocket *ss = ssl_FindSocket(fd);
  if (!ss || !readEpoch || !writeEpoch) {
    return SECFailure;
  }

  ssl_GetSpecReadLock(ss);
  *readEpoch = ss->ssl3.crSpec->epoch;
  *writeEpoch = ss->ssl3.cwSpec->epoch;
  ssl_ReleaseSpecReadLock(ss);
  return SECSuccess;
}