1 | /* |
2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
3 | * Copyright 2005 Nokia. All rights reserved. |
4 | * |
5 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
6 | * this file except in compliance with the License. You can obtain a copy |
7 | * in the file LICENSE in the source distribution or at |
8 | * https://www.openssl.org/source/license.html |
9 | */ |
10 | |
11 | #include <stdio.h> |
12 | #include <stdlib.h> |
13 | #include "ssl_local.h" |
14 | #include <openssl/asn1t.h> |
15 | #include <openssl/x509.h> |
16 | |
17 | typedef struct { |
18 | uint32_t version; |
19 | int32_t ssl_version; |
20 | ASN1_OCTET_STRING *cipher; |
21 | ASN1_OCTET_STRING *comp_id; |
22 | ASN1_OCTET_STRING *master_key; |
23 | ASN1_OCTET_STRING *session_id; |
24 | ASN1_OCTET_STRING *key_arg; |
25 | int64_t time; |
26 | int64_t timeout; |
27 | X509 *peer; |
28 | ASN1_OCTET_STRING *session_id_context; |
29 | int32_t verify_result; |
30 | ASN1_OCTET_STRING *tlsext_hostname; |
31 | uint64_t tlsext_tick_lifetime_hint; |
32 | uint32_t tlsext_tick_age_add; |
33 | ASN1_OCTET_STRING *tlsext_tick; |
34 | #ifndef OPENSSL_NO_PSK |
35 | ASN1_OCTET_STRING *psk_identity_hint; |
36 | ASN1_OCTET_STRING *psk_identity; |
37 | #endif |
38 | #ifndef OPENSSL_NO_SRP |
39 | ASN1_OCTET_STRING *srp_username; |
40 | #endif |
41 | uint64_t flags; |
42 | uint32_t max_early_data; |
43 | ASN1_OCTET_STRING *alpn_selected; |
44 | uint32_t tlsext_max_fragment_len_mode; |
45 | ASN1_OCTET_STRING *ticket_appdata; |
46 | } SSL_SESSION_ASN1; |
47 | |
48 | ASN1_SEQUENCE(SSL_SESSION_ASN1) = { |
49 | ASN1_EMBED(SSL_SESSION_ASN1, version, UINT32), |
50 | ASN1_EMBED(SSL_SESSION_ASN1, ssl_version, INT32), |
51 | ASN1_SIMPLE(SSL_SESSION_ASN1, cipher, ASN1_OCTET_STRING), |
52 | ASN1_SIMPLE(SSL_SESSION_ASN1, session_id, ASN1_OCTET_STRING), |
53 | ASN1_SIMPLE(SSL_SESSION_ASN1, master_key, ASN1_OCTET_STRING), |
54 | ASN1_IMP_OPT(SSL_SESSION_ASN1, key_arg, ASN1_OCTET_STRING, 0), |
55 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, time, ZINT64, 1), |
56 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, timeout, ZINT64, 2), |
57 | ASN1_EXP_OPT(SSL_SESSION_ASN1, peer, X509, 3), |
58 | ASN1_EXP_OPT(SSL_SESSION_ASN1, session_id_context, ASN1_OCTET_STRING, 4), |
59 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, verify_result, ZINT32, 5), |
60 | ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_hostname, ASN1_OCTET_STRING, 6), |
61 | #ifndef OPENSSL_NO_PSK |
62 | ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity_hint, ASN1_OCTET_STRING, 7), |
63 | ASN1_EXP_OPT(SSL_SESSION_ASN1, psk_identity, ASN1_OCTET_STRING, 8), |
64 | #endif |
65 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_tick_lifetime_hint, ZUINT64, 9), |
66 | ASN1_EXP_OPT(SSL_SESSION_ASN1, tlsext_tick, ASN1_OCTET_STRING, 10), |
67 | ASN1_EXP_OPT(SSL_SESSION_ASN1, comp_id, ASN1_OCTET_STRING, 11), |
68 | #ifndef OPENSSL_NO_SRP |
69 | ASN1_EXP_OPT(SSL_SESSION_ASN1, srp_username, ASN1_OCTET_STRING, 12), |
70 | #endif |
71 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, flags, ZUINT64, 13), |
72 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_tick_age_add, ZUINT32, 14), |
73 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, max_early_data, ZUINT32, 15), |
74 | ASN1_EXP_OPT(SSL_SESSION_ASN1, alpn_selected, ASN1_OCTET_STRING, 16), |
75 | ASN1_EXP_OPT_EMBED(SSL_SESSION_ASN1, tlsext_max_fragment_len_mode, ZUINT32, 17), |
76 | ASN1_EXP_OPT(SSL_SESSION_ASN1, ticket_appdata, ASN1_OCTET_STRING, 18) |
77 | } static_ASN1_SEQUENCE_END(SSL_SESSION_ASN1) |
78 | |
79 | IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(SSL_SESSION_ASN1) |
80 | |
81 | /* Utility functions for i2d_SSL_SESSION */ |
82 | |
83 | /* Initialise OCTET STRING from buffer and length */ |
84 | |
85 | static void ssl_session_oinit(ASN1_OCTET_STRING **dest, ASN1_OCTET_STRING *os, |
86 | const unsigned char *data, size_t len) |
87 | { |
88 | os->data = (unsigned char *)data; /* justified cast: data is not modified */ |
89 | os->length = (int)len; |
90 | os->flags = 0; |
91 | *dest = os; |
92 | } |
93 | |
94 | /* Initialise OCTET STRING from string */ |
95 | static void ssl_session_sinit(ASN1_OCTET_STRING **dest, ASN1_OCTET_STRING *os, |
96 | const char *data) |
97 | { |
98 | if (data != NULL) |
99 | ssl_session_oinit(dest, os, (const unsigned char *)data, strlen(data)); |
100 | else |
101 | *dest = NULL; |
102 | } |
103 | |
104 | int i2d_SSL_SESSION(const SSL_SESSION *in, unsigned char **pp) |
105 | { |
106 | |
107 | SSL_SESSION_ASN1 as; |
108 | |
109 | ASN1_OCTET_STRING cipher; |
110 | unsigned char cipher_data[2]; |
111 | ASN1_OCTET_STRING master_key, session_id, sid_ctx; |
112 | |
113 | #ifndef OPENSSL_NO_COMP |
114 | ASN1_OCTET_STRING comp_id; |
115 | unsigned char comp_id_data; |
116 | #endif |
117 | ASN1_OCTET_STRING tlsext_hostname, tlsext_tick; |
118 | #ifndef OPENSSL_NO_SRP |
119 | ASN1_OCTET_STRING srp_username; |
120 | #endif |
121 | #ifndef OPENSSL_NO_PSK |
122 | ASN1_OCTET_STRING psk_identity, psk_identity_hint; |
123 | #endif |
124 | ASN1_OCTET_STRING alpn_selected; |
125 | ASN1_OCTET_STRING ticket_appdata; |
126 | |
127 | long l; |
128 | |
129 | if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) |
130 | return 0; |
131 | |
132 | memset(&as, 0, sizeof(as)); |
133 | |
134 | as.version = SSL_SESSION_ASN1_VERSION; |
135 | as.ssl_version = in->ssl_version; |
136 | |
137 | if (in->cipher == NULL) |
138 | l = in->cipher_id; |
139 | else |
140 | l = in->cipher->id; |
141 | cipher_data[0] = ((unsigned char)(l >> 8L)) & 0xff; |
142 | cipher_data[1] = ((unsigned char)(l)) & 0xff; |
143 | |
144 | ssl_session_oinit(&as.cipher, &cipher, cipher_data, 2); |
145 | |
146 | #ifndef OPENSSL_NO_COMP |
147 | if (in->compress_meth) { |
148 | comp_id_data = (unsigned char)in->compress_meth; |
149 | ssl_session_oinit(&as.comp_id, &comp_id, &comp_id_data, 1); |
150 | } |
151 | #endif |
152 | |
153 | ssl_session_oinit(&as.master_key, &master_key, |
154 | in->master_key, in->master_key_length); |
155 | |
156 | ssl_session_oinit(&as.session_id, &session_id, |
157 | in->session_id, in->session_id_length); |
158 | |
159 | ssl_session_oinit(&as.session_id_context, &sid_ctx, |
160 | in->sid_ctx, in->sid_ctx_length); |
161 | |
162 | as.time = in->time; |
163 | as.timeout = in->timeout; |
164 | as.verify_result = in->verify_result; |
165 | |
166 | as.peer = in->peer; |
167 | |
168 | ssl_session_sinit(&as.tlsext_hostname, &tlsext_hostname, |
169 | in->ext.hostname); |
170 | if (in->ext.tick) { |
171 | ssl_session_oinit(&as.tlsext_tick, &tlsext_tick, |
172 | in->ext.tick, in->ext.ticklen); |
173 | } |
174 | if (in->ext.tick_lifetime_hint > 0) |
175 | as.tlsext_tick_lifetime_hint = in->ext.tick_lifetime_hint; |
176 | as.tlsext_tick_age_add = in->ext.tick_age_add; |
177 | #ifndef OPENSSL_NO_PSK |
178 | ssl_session_sinit(&as.psk_identity_hint, &psk_identity_hint, |
179 | in->psk_identity_hint); |
180 | ssl_session_sinit(&as.psk_identity, &psk_identity, in->psk_identity); |
181 | #endif /* OPENSSL_NO_PSK */ |
182 | #ifndef OPENSSL_NO_SRP |
183 | ssl_session_sinit(&as.srp_username, &srp_username, in->srp_username); |
184 | #endif /* OPENSSL_NO_SRP */ |
185 | |
186 | as.flags = in->flags; |
187 | as.max_early_data = in->ext.max_early_data; |
188 | |
189 | if (in->ext.alpn_selected == NULL) |
190 | as.alpn_selected = NULL; |
191 | else |
192 | ssl_session_oinit(&as.alpn_selected, &alpn_selected, |
193 | in->ext.alpn_selected, in->ext.alpn_selected_len); |
194 | |
195 | as.tlsext_max_fragment_len_mode = in->ext.max_fragment_len_mode; |
196 | |
197 | if (in->ticket_appdata == NULL) |
198 | as.ticket_appdata = NULL; |
199 | else |
200 | ssl_session_oinit(&as.ticket_appdata, &ticket_appdata, |
201 | in->ticket_appdata, in->ticket_appdata_len); |
202 | |
203 | return i2d_SSL_SESSION_ASN1(&as, pp); |
204 | |
205 | } |
206 | |
207 | /* Utility functions for d2i_SSL_SESSION */ |
208 | |
209 | /* OPENSSL_strndup an OCTET STRING */ |
210 | |
211 | static int ssl_session_strndup(char **pdst, ASN1_OCTET_STRING *src) |
212 | { |
213 | OPENSSL_free(*pdst); |
214 | *pdst = NULL; |
215 | if (src == NULL) |
216 | return 1; |
217 | *pdst = OPENSSL_strndup((char *)src->data, src->length); |
218 | if (*pdst == NULL) |
219 | return 0; |
220 | return 1; |
221 | } |
222 | |
223 | /* Copy an OCTET STRING, return error if it exceeds maximum length */ |
224 | |
225 | static int ssl_session_memcpy(unsigned char *dst, size_t *pdstlen, |
226 | ASN1_OCTET_STRING *src, size_t maxlen) |
227 | { |
228 | if (src == NULL) { |
229 | *pdstlen = 0; |
230 | return 1; |
231 | } |
232 | if (src->length < 0 || src->length > (int)maxlen) |
233 | return 0; |
234 | memcpy(dst, src->data, src->length); |
235 | *pdstlen = src->length; |
236 | return 1; |
237 | } |
238 | |
239 | SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, |
240 | long length) |
241 | { |
242 | long id; |
243 | size_t tmpl; |
244 | const unsigned char *p = *pp; |
245 | SSL_SESSION_ASN1 *as = NULL; |
246 | SSL_SESSION *ret = NULL; |
247 | |
248 | as = d2i_SSL_SESSION_ASN1(NULL, &p, length); |
249 | /* ASN.1 code returns suitable error */ |
250 | if (as == NULL) |
251 | goto err; |
252 | |
253 | if (a == NULL || *a == NULL) { |
254 | ret = SSL_SESSION_new(); |
255 | if (ret == NULL) |
256 | goto err; |
257 | } else { |
258 | ret = *a; |
259 | } |
260 | |
261 | if (as->version != SSL_SESSION_ASN1_VERSION) { |
262 | SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNKNOWN_SSL_VERSION); |
263 | goto err; |
264 | } |
265 | |
266 | if ((as->ssl_version >> 8) != SSL3_VERSION_MAJOR |
267 | && (as->ssl_version >> 8) != DTLS1_VERSION_MAJOR |
268 | && as->ssl_version != DTLS1_BAD_VER) { |
269 | SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_UNSUPPORTED_SSL_VERSION); |
270 | goto err; |
271 | } |
272 | |
273 | ret->ssl_version = (int)as->ssl_version; |
274 | |
275 | if (as->cipher->length != 2) { |
276 | SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_CIPHER_CODE_WRONG_LENGTH); |
277 | goto err; |
278 | } |
279 | |
280 | id = 0x03000000L | ((unsigned long)as->cipher->data[0] << 8L) |
281 | | (unsigned long)as->cipher->data[1]; |
282 | |
283 | ret->cipher_id = id; |
284 | ret->cipher = ssl3_get_cipher_by_id(id); |
285 | if (ret->cipher == NULL) |
286 | goto err; |
287 | |
288 | if (!ssl_session_memcpy(ret->session_id, &ret->session_id_length, |
289 | as->session_id, SSL3_MAX_SSL_SESSION_ID_LENGTH)) |
290 | goto err; |
291 | |
292 | if (!ssl_session_memcpy(ret->master_key, &tmpl, |
293 | as->master_key, TLS13_MAX_RESUMPTION_PSK_LENGTH)) |
294 | goto err; |
295 | |
296 | ret->master_key_length = tmpl; |
297 | |
298 | if (as->time != 0) |
299 | ret->time = (long)as->time; |
300 | else |
301 | ret->time = (long)time(NULL); |
302 | |
303 | if (as->timeout != 0) |
304 | ret->timeout = (long)as->timeout; |
305 | else |
306 | ret->timeout = 3; |
307 | |
308 | X509_free(ret->peer); |
309 | ret->peer = as->peer; |
310 | as->peer = NULL; |
311 | |
312 | if (!ssl_session_memcpy(ret->sid_ctx, &ret->sid_ctx_length, |
313 | as->session_id_context, SSL_MAX_SID_CTX_LENGTH)) |
314 | goto err; |
315 | |
316 | /* NB: this defaults to zero which is X509_V_OK */ |
317 | ret->verify_result = as->verify_result; |
318 | |
319 | if (!ssl_session_strndup(&ret->ext.hostname, as->tlsext_hostname)) |
320 | goto err; |
321 | |
322 | #ifndef OPENSSL_NO_PSK |
323 | if (!ssl_session_strndup(&ret->psk_identity_hint, as->psk_identity_hint)) |
324 | goto err; |
325 | if (!ssl_session_strndup(&ret->psk_identity, as->psk_identity)) |
326 | goto err; |
327 | #endif |
328 | |
329 | ret->ext.tick_lifetime_hint = (unsigned long)as->tlsext_tick_lifetime_hint; |
330 | ret->ext.tick_age_add = as->tlsext_tick_age_add; |
331 | OPENSSL_free(ret->ext.tick); |
332 | if (as->tlsext_tick != NULL) { |
333 | ret->ext.tick = as->tlsext_tick->data; |
334 | ret->ext.ticklen = as->tlsext_tick->length; |
335 | as->tlsext_tick->data = NULL; |
336 | } else { |
337 | ret->ext.tick = NULL; |
338 | } |
339 | #ifndef OPENSSL_NO_COMP |
340 | if (as->comp_id) { |
341 | if (as->comp_id->length != 1) { |
342 | SSLerr(SSL_F_D2I_SSL_SESSION, SSL_R_BAD_LENGTH); |
343 | goto err; |
344 | } |
345 | ret->compress_meth = as->comp_id->data[0]; |
346 | } else { |
347 | ret->compress_meth = 0; |
348 | } |
349 | #endif |
350 | |
351 | #ifndef OPENSSL_NO_SRP |
352 | if (!ssl_session_strndup(&ret->srp_username, as->srp_username)) |
353 | goto err; |
354 | #endif /* OPENSSL_NO_SRP */ |
355 | /* Flags defaults to zero which is fine */ |
356 | ret->flags = (int32_t)as->flags; |
357 | ret->ext.max_early_data = as->max_early_data; |
358 | |
359 | OPENSSL_free(ret->ext.alpn_selected); |
360 | if (as->alpn_selected != NULL) { |
361 | ret->ext.alpn_selected = as->alpn_selected->data; |
362 | ret->ext.alpn_selected_len = as->alpn_selected->length; |
363 | as->alpn_selected->data = NULL; |
364 | } else { |
365 | ret->ext.alpn_selected = NULL; |
366 | ret->ext.alpn_selected_len = 0; |
367 | } |
368 | |
369 | ret->ext.max_fragment_len_mode = as->tlsext_max_fragment_len_mode; |
370 | |
371 | OPENSSL_free(ret->ticket_appdata); |
372 | if (as->ticket_appdata != NULL) { |
373 | ret->ticket_appdata = as->ticket_appdata->data; |
374 | ret->ticket_appdata_len = as->ticket_appdata->length; |
375 | as->ticket_appdata->data = NULL; |
376 | } else { |
377 | ret->ticket_appdata = NULL; |
378 | ret->ticket_appdata_len = 0; |
379 | } |
380 | |
381 | M_ASN1_free_of(as, SSL_SESSION_ASN1); |
382 | |
383 | if ((a != NULL) && (*a == NULL)) |
384 | *a = ret; |
385 | *pp = p; |
386 | return ret; |
387 | |
388 | err: |
389 | M_ASN1_free_of(as, SSL_SESSION_ASN1); |
390 | if ((a == NULL) || (*a != ret)) |
391 | SSL_SESSION_free(ret); |
392 | return NULL; |
393 | } |
394 | |