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6dd083fd | 1 | /* |
6738bf14 | 2 | * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved. |
6dd083fd | 3 | * |
2c18d164 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
6dd083fd MC |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
ab83e314 | 10 | #include <openssl/ocsp.h> |
706457b7 | 11 | #include "../ssl_local.h" |
67dc995e | 12 | #include "internal/cryptlib.h" |
706457b7 | 13 | #include "statem_local.h" |
6dd083fd | 14 | |
b186a592 MC |
15 | EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, |
16 | unsigned int context, X509 *x, | |
f63a17d6 | 17 | size_t chainidx) |
ab83e314 MC |
18 | { |
19 | /* Add RI if renegotiating */ | |
20 | if (!s->renegotiate) | |
b186a592 | 21 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
22 | |
23 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate) | |
24 | || !WPACKET_start_sub_packet_u16(pkt) | |
555cbb32 TS |
25 | || !WPACKET_sub_memcpy_u8(pkt, s->s3.previous_client_finished, |
26 | s->s3.previous_client_finished_len) | |
ab83e314 | 27 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
28 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, |
29 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 30 | return EXT_RETURN_FAIL; |
ab83e314 MC |
31 | } |
32 | ||
b186a592 | 33 | return EXT_RETURN_SENT; |
ab83e314 MC |
34 | } |
35 | ||
b186a592 MC |
36 | EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, |
37 | unsigned int context, X509 *x, | |
f63a17d6 | 38 | size_t chainidx) |
ab83e314 | 39 | { |
aff8c126 | 40 | if (s->ext.hostname == NULL) |
b186a592 | 41 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
42 | |
43 | /* Add TLS extension servername to the Client Hello message */ | |
44 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name) | |
45 | /* Sub-packet for server_name extension */ | |
46 | || !WPACKET_start_sub_packet_u16(pkt) | |
47 | /* Sub-packet for servername list (always 1 hostname)*/ | |
48 | || !WPACKET_start_sub_packet_u16(pkt) | |
49 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name) | |
aff8c126 RS |
50 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname, |
51 | strlen(s->ext.hostname)) | |
ab83e314 MC |
52 | || !WPACKET_close(pkt) |
53 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
54 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, |
55 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 56 | return EXT_RETURN_FAIL; |
ab83e314 MC |
57 | } |
58 | ||
b186a592 | 59 | return EXT_RETURN_SENT; |
ab83e314 MC |
60 | } |
61 | ||
cf72c757 F |
62 | /* Push a Max Fragment Len extension into ClientHello */ |
63 | EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, | |
64 | unsigned int context, X509 *x, | |
f63a17d6 | 65 | size_t chainidx) |
cf72c757 F |
66 | { |
67 | if (s->ext.max_fragment_len_mode == TLSEXT_max_fragment_length_DISABLED) | |
68 | return EXT_RETURN_NOT_SENT; | |
69 | ||
70 | /* Add Max Fragment Length extension if client enabled it. */ | |
71 | /*- | |
72 | * 4 bytes for this extension type and extension length | |
73 | * 1 byte for the Max Fragment Length code value. | |
74 | */ | |
75 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length) | |
76 | /* Sub-packet for Max Fragment Length extension (1 byte) */ | |
77 | || !WPACKET_start_sub_packet_u16(pkt) | |
78 | || !WPACKET_put_bytes_u8(pkt, s->ext.max_fragment_len_mode) | |
79 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
80 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
81 | SSL_F_TLS_CONSTRUCT_CTOS_MAXFRAGMENTLEN, ERR_R_INTERNAL_ERROR); | |
cf72c757 F |
82 | return EXT_RETURN_FAIL; |
83 | } | |
84 | ||
85 | return EXT_RETURN_SENT; | |
86 | } | |
87 | ||
ab83e314 | 88 | #ifndef OPENSSL_NO_SRP |
b186a592 | 89 | EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 90 | X509 *x, size_t chainidx) |
ab83e314 MC |
91 | { |
92 | /* Add SRP username if there is one */ | |
93 | if (s->srp_ctx.login == NULL) | |
b186a592 | 94 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
95 | |
96 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp) | |
97 | /* Sub-packet for SRP extension */ | |
98 | || !WPACKET_start_sub_packet_u16(pkt) | |
99 | || !WPACKET_start_sub_packet_u8(pkt) | |
100 | /* login must not be zero...internal error if so */ | |
101 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) | |
102 | || !WPACKET_memcpy(pkt, s->srp_ctx.login, | |
103 | strlen(s->srp_ctx.login)) | |
104 | || !WPACKET_close(pkt) | |
105 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
106 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SRP, |
107 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 108 | return EXT_RETURN_FAIL; |
ab83e314 MC |
109 | } |
110 | ||
b186a592 | 111 | return EXT_RETURN_SENT; |
ab83e314 MC |
112 | } |
113 | #endif | |
114 | ||
115 | #ifndef OPENSSL_NO_EC | |
dbc6268f | 116 | static int use_ecc(SSL *s, int max_version) |
ab83e314 | 117 | { |
589b6227 | 118 | int i, end, ret = 0; |
ab83e314 MC |
119 | unsigned long alg_k, alg_a; |
120 | STACK_OF(SSL_CIPHER) *cipher_stack = NULL; | |
dbc6268f MC |
121 | const uint16_t *pgroups = NULL; |
122 | size_t num_groups, j; | |
ab83e314 MC |
123 | |
124 | /* See if we support any ECC ciphersuites */ | |
125 | if (s->version == SSL3_VERSION) | |
126 | return 0; | |
127 | ||
589b6227 | 128 | cipher_stack = SSL_get1_supported_ciphers(s); |
1266eefd MC |
129 | end = sk_SSL_CIPHER_num(cipher_stack); |
130 | for (i = 0; i < end; i++) { | |
ab83e314 MC |
131 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
132 | ||
133 | alg_k = c->algorithm_mkey; | |
134 | alg_a = c->algorithm_auth; | |
135 | if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) | |
1266eefd | 136 | || (alg_a & SSL_aECDSA) |
589b6227 MC |
137 | || c->min_tls >= TLS1_3_VERSION) { |
138 | ret = 1; | |
139 | break; | |
140 | } | |
ab83e314 | 141 | } |
589b6227 | 142 | sk_SSL_CIPHER_free(cipher_stack); |
dbc6268f MC |
143 | if (!ret) |
144 | return 0; | |
145 | ||
146 | /* Check we have at least one EC supported group */ | |
147 | tls1_get_supported_groups(s, &pgroups, &num_groups); | |
148 | for (j = 0; j < num_groups; j++) { | |
149 | uint16_t ctmp = pgroups[j]; | |
150 | ||
151 | if (tls_valid_group(s, ctmp, max_version) | |
152 | && tls_group_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) | |
153 | return 1; | |
154 | } | |
155 | ||
156 | return 0; | |
ab83e314 MC |
157 | } |
158 | ||
b186a592 MC |
159 | EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, |
160 | unsigned int context, X509 *x, | |
f63a17d6 | 161 | size_t chainidx) |
ab83e314 MC |
162 | { |
163 | const unsigned char *pformats; | |
164 | size_t num_formats; | |
dbc6268f | 165 | int reason, min_version, max_version; |
ab83e314 | 166 | |
dbc6268f MC |
167 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
168 | if (reason != 0) { | |
169 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
170 | SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, reason); | |
171 | return EXT_RETURN_FAIL; | |
172 | } | |
173 | if (!use_ecc(s, max_version)) | |
b186a592 | 174 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
175 | |
176 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
ab83e314 MC |
177 | tls1_get_formatlist(s, &pformats, &num_formats); |
178 | ||
179 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats) | |
180 | /* Sub-packet for formats extension */ | |
181 | || !WPACKET_start_sub_packet_u16(pkt) | |
182 | || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats) | |
183 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
184 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
185 | SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
b186a592 | 186 | return EXT_RETURN_FAIL; |
ab83e314 MC |
187 | } |
188 | ||
b186a592 | 189 | return EXT_RETURN_SENT; |
ab83e314 | 190 | } |
dbc6268f | 191 | #endif |
ab83e314 | 192 | |
dbc6268f | 193 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) |
b186a592 MC |
194 | EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, |
195 | unsigned int context, X509 *x, | |
f63a17d6 | 196 | size_t chainidx) |
ab83e314 | 197 | { |
f48d826e DSH |
198 | const uint16_t *pgroups = NULL; |
199 | size_t num_groups = 0, i; | |
9aaecbfc | 200 | int min_version, max_version, reason; |
ab83e314 | 201 | |
9aaecbfc | 202 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
203 | if (reason != 0) { | |
204 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
205 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, reason); | |
206 | return EXT_RETURN_FAIL; | |
207 | } | |
208 | ||
dbc6268f MC |
209 | #if defined(OPENSSL_NO_EC) |
210 | if (max_version < TLS1_3_VERSION) | |
211 | return EXT_RETURN_NOT_SENT; | |
212 | #else | |
213 | if (!use_ecc(s, max_version) && max_version < TLS1_3_VERSION) | |
214 | return EXT_RETURN_NOT_SENT; | |
215 | #endif | |
216 | ||
ab83e314 MC |
217 | /* |
218 | * Add TLS extension supported_groups to the ClientHello message | |
219 | */ | |
f48d826e | 220 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
221 | |
222 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups) | |
223 | /* Sub-packet for supported_groups extension */ | |
224 | || !WPACKET_start_sub_packet_u16(pkt) | |
9aaecbfc | 225 | || !WPACKET_start_sub_packet_u16(pkt) |
226 | || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)) { | |
f63a17d6 MC |
227 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
228 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
229 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 230 | return EXT_RETURN_FAIL; |
ab83e314 | 231 | } |
9aaecbfc | 232 | /* Copy group ID if supported */ |
f48d826e DSH |
233 | for (i = 0; i < num_groups; i++) { |
234 | uint16_t ctmp = pgroups[i]; | |
9e84a42d | 235 | |
9aaecbfc | 236 | if (tls_valid_group(s, ctmp, max_version) |
dbc6268f | 237 | && tls_group_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) { |
9e84a42d | 238 | if (!WPACKET_put_bytes_u16(pkt, ctmp)) { |
9aaecbfc | 239 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
240 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
241 | ERR_R_INTERNAL_ERROR); | |
242 | return EXT_RETURN_FAIL; | |
243 | } | |
ab83e314 MC |
244 | } |
245 | } | |
246 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
635c8f77 MC |
247 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
248 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS, | |
249 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 250 | return EXT_RETURN_FAIL; |
ab83e314 MC |
251 | } |
252 | ||
b186a592 | 253 | return EXT_RETURN_SENT; |
ab83e314 MC |
254 | } |
255 | #endif | |
256 | ||
b186a592 MC |
257 | EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, |
258 | unsigned int context, X509 *x, | |
f63a17d6 | 259 | size_t chainidx) |
ab83e314 MC |
260 | { |
261 | size_t ticklen; | |
262 | ||
263 | if (!tls_use_ticket(s)) | |
b186a592 | 264 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
265 | |
266 | if (!s->new_session && s->session != NULL | |
08191294 MC |
267 | && s->session->ext.tick != NULL |
268 | && s->session->ssl_version != TLS1_3_VERSION) { | |
aff8c126 RS |
269 | ticklen = s->session->ext.ticklen; |
270 | } else if (s->session && s->ext.session_ticket != NULL | |
271 | && s->ext.session_ticket->data != NULL) { | |
272 | ticklen = s->ext.session_ticket->length; | |
273 | s->session->ext.tick = OPENSSL_malloc(ticklen); | |
274 | if (s->session->ext.tick == NULL) { | |
f63a17d6 MC |
275 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
276 | SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, | |
277 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 278 | return EXT_RETURN_FAIL; |
ab83e314 | 279 | } |
aff8c126 RS |
280 | memcpy(s->session->ext.tick, |
281 | s->ext.session_ticket->data, ticklen); | |
282 | s->session->ext.ticklen = ticklen; | |
ab83e314 MC |
283 | } else { |
284 | ticklen = 0; | |
285 | } | |
286 | ||
aff8c126 RS |
287 | if (ticklen == 0 && s->ext.session_ticket != NULL && |
288 | s->ext.session_ticket->data == NULL) | |
b186a592 | 289 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
290 | |
291 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket) | |
aff8c126 | 292 | || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) { |
f63a17d6 MC |
293 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
294 | SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR); | |
b186a592 | 295 | return EXT_RETURN_FAIL; |
ab83e314 MC |
296 | } |
297 | ||
b186a592 | 298 | return EXT_RETURN_SENT; |
ab83e314 MC |
299 | } |
300 | ||
b186a592 MC |
301 | EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, |
302 | unsigned int context, X509 *x, | |
f63a17d6 | 303 | size_t chainidx) |
ab83e314 MC |
304 | { |
305 | size_t salglen; | |
98c792d1 | 306 | const uint16_t *salg; |
ab83e314 MC |
307 | |
308 | if (!SSL_CLIENT_USE_SIGALGS(s)) | |
b186a592 | 309 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 310 | |
a9669ddc | 311 | salglen = tls12_get_psigalgs(s, 1, &salg); |
ab83e314 MC |
312 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms) |
313 | /* Sub-packet for sig-algs extension */ | |
314 | || !WPACKET_start_sub_packet_u16(pkt) | |
315 | /* Sub-packet for the actual list */ | |
316 | || !WPACKET_start_sub_packet_u16(pkt) | |
317 | || !tls12_copy_sigalgs(s, pkt, salg, salglen) | |
318 | || !WPACKET_close(pkt) | |
319 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
320 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, |
321 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 322 | return EXT_RETURN_FAIL; |
ab83e314 MC |
323 | } |
324 | ||
b186a592 | 325 | return EXT_RETURN_SENT; |
ab83e314 MC |
326 | } |
327 | ||
328 | #ifndef OPENSSL_NO_OCSP | |
b186a592 MC |
329 | EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, |
330 | unsigned int context, X509 *x, | |
f63a17d6 | 331 | size_t chainidx) |
ab83e314 MC |
332 | { |
333 | int i; | |
334 | ||
e96e0f8e MC |
335 | /* This extension isn't defined for client Certificates */ |
336 | if (x != NULL) | |
b186a592 | 337 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 338 | |
aff8c126 | 339 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) |
b186a592 | 340 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
341 | |
342 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request) | |
343 | /* Sub-packet for status request extension */ | |
344 | || !WPACKET_start_sub_packet_u16(pkt) | |
345 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp) | |
346 | /* Sub-packet for the ids */ | |
347 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
348 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
349 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 350 | return EXT_RETURN_FAIL; |
ab83e314 | 351 | } |
aff8c126 | 352 | for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) { |
ab83e314 | 353 | unsigned char *idbytes; |
aff8c126 | 354 | OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i); |
1266eefd | 355 | int idlen = i2d_OCSP_RESPID(id, NULL); |
ab83e314 | 356 | |
ab83e314 MC |
357 | if (idlen <= 0 |
358 | /* Sub-packet for an individual id */ | |
359 | || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes) | |
360 | || i2d_OCSP_RESPID(id, &idbytes) != idlen) { | |
f63a17d6 MC |
361 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
362 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
363 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 364 | return EXT_RETURN_FAIL; |
ab83e314 MC |
365 | } |
366 | } | |
367 | if (!WPACKET_close(pkt) | |
368 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
369 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
370 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 371 | return EXT_RETURN_FAIL; |
ab83e314 | 372 | } |
aff8c126 | 373 | if (s->ext.ocsp.exts) { |
ab83e314 | 374 | unsigned char *extbytes; |
aff8c126 | 375 | int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL); |
ab83e314 MC |
376 | |
377 | if (extlen < 0) { | |
f63a17d6 MC |
378 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
379 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
380 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 381 | return EXT_RETURN_FAIL; |
ab83e314 MC |
382 | } |
383 | if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes) | |
aff8c126 | 384 | || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes) |
ab83e314 | 385 | != extlen) { |
f63a17d6 MC |
386 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
387 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, | |
388 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 389 | return EXT_RETURN_FAIL; |
ab83e314 MC |
390 | } |
391 | } | |
392 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
393 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
394 | SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR); | |
b186a592 | 395 | return EXT_RETURN_FAIL; |
ab83e314 MC |
396 | } |
397 | ||
b186a592 | 398 | return EXT_RETURN_SENT; |
ab83e314 MC |
399 | } |
400 | #endif | |
401 | ||
402 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
b186a592 | 403 | EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 404 | X509 *x, size_t chainidx) |
ab83e314 | 405 | { |
c7f47786 | 406 | if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 407 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
408 | |
409 | /* | |
410 | * The client advertises an empty extension to indicate its support | |
411 | * for Next Protocol Negotiation | |
412 | */ | |
413 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg) | |
414 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
415 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_NPN, |
416 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 417 | return EXT_RETURN_FAIL; |
ab83e314 MC |
418 | } |
419 | ||
b186a592 | 420 | return EXT_RETURN_SENT; |
ab83e314 MC |
421 | } |
422 | #endif | |
423 | ||
b186a592 | 424 | EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 425 | X509 *x, size_t chainidx) |
ab83e314 | 426 | { |
555cbb32 | 427 | s->s3.alpn_sent = 0; |
ab83e314 | 428 | |
c7f47786 | 429 | if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s)) |
b186a592 | 430 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
431 | |
432 | if (!WPACKET_put_bytes_u16(pkt, | |
433 | TLSEXT_TYPE_application_layer_protocol_negotiation) | |
434 | /* Sub-packet ALPN extension */ | |
435 | || !WPACKET_start_sub_packet_u16(pkt) | |
aff8c126 | 436 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len) |
ab83e314 | 437 | || !WPACKET_close(pkt)) { |
f63a17d6 MC |
438 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ALPN, |
439 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 440 | return EXT_RETURN_FAIL; |
ab83e314 | 441 | } |
555cbb32 | 442 | s->s3.alpn_sent = 1; |
ab83e314 | 443 | |
b186a592 | 444 | return EXT_RETURN_SENT; |
ab83e314 MC |
445 | } |
446 | ||
447 | ||
448 | #ifndef OPENSSL_NO_SRTP | |
b186a592 MC |
449 | EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, |
450 | unsigned int context, X509 *x, | |
f63a17d6 | 451 | size_t chainidx) |
ab83e314 MC |
452 | { |
453 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s); | |
1266eefd | 454 | int i, end; |
ab83e314 MC |
455 | |
456 | if (clnt == NULL) | |
b186a592 | 457 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
458 | |
459 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp) | |
460 | /* Sub-packet for SRTP extension */ | |
461 | || !WPACKET_start_sub_packet_u16(pkt) | |
462 | /* Sub-packet for the protection profile list */ | |
463 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
464 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, |
465 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 466 | return EXT_RETURN_FAIL; |
ab83e314 | 467 | } |
1266eefd MC |
468 | |
469 | end = sk_SRTP_PROTECTION_PROFILE_num(clnt); | |
470 | for (i = 0; i < end; i++) { | |
471 | const SRTP_PROTECTION_PROFILE *prof = | |
472 | sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
473 | ||
ab83e314 | 474 | if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) { |
f63a17d6 MC |
475 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
476 | SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR); | |
b186a592 | 477 | return EXT_RETURN_FAIL; |
ab83e314 MC |
478 | } |
479 | } | |
480 | if (!WPACKET_close(pkt) | |
481 | /* Add an empty use_mki value */ | |
482 | || !WPACKET_put_bytes_u8(pkt, 0) | |
483 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
484 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, |
485 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 486 | return EXT_RETURN_FAIL; |
ab83e314 MC |
487 | } |
488 | ||
b186a592 | 489 | return EXT_RETURN_SENT; |
ab83e314 MC |
490 | } |
491 | #endif | |
492 | ||
b186a592 | 493 | EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 494 | X509 *x, size_t chainidx) |
ab83e314 MC |
495 | { |
496 | if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
b186a592 | 497 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
498 | |
499 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac) | |
500 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
501 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ETM, |
502 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 503 | return EXT_RETURN_FAIL; |
ab83e314 MC |
504 | } |
505 | ||
b186a592 | 506 | return EXT_RETURN_SENT; |
ab83e314 MC |
507 | } |
508 | ||
509 | #ifndef OPENSSL_NO_CT | |
b186a592 | 510 | EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 511 | X509 *x, size_t chainidx) |
ab83e314 MC |
512 | { |
513 | if (s->ct_validation_callback == NULL) | |
b186a592 | 514 | return EXT_RETURN_NOT_SENT; |
ab83e314 | 515 | |
e96e0f8e MC |
516 | /* Not defined for client Certificates */ |
517 | if (x != NULL) | |
b186a592 | 518 | return EXT_RETURN_NOT_SENT; |
e96e0f8e | 519 | |
ab83e314 MC |
520 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp) |
521 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
522 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SCT, |
523 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 524 | return EXT_RETURN_FAIL; |
ab83e314 MC |
525 | } |
526 | ||
b186a592 | 527 | return EXT_RETURN_SENT; |
ab83e314 MC |
528 | } |
529 | #endif | |
530 | ||
b186a592 | 531 | EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 532 | X509 *x, size_t chainidx) |
ab83e314 | 533 | { |
088dfa13 TS |
534 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
535 | return EXT_RETURN_NOT_SENT; | |
536 | ||
ab83e314 MC |
537 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret) |
538 | || !WPACKET_put_bytes_u16(pkt, 0)) { | |
f63a17d6 MC |
539 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EMS, |
540 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 541 | return EXT_RETURN_FAIL; |
ab83e314 MC |
542 | } |
543 | ||
b186a592 | 544 | return EXT_RETURN_SENT; |
ab83e314 MC |
545 | } |
546 | ||
b186a592 MC |
547 | EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, |
548 | unsigned int context, X509 *x, | |
f63a17d6 | 549 | size_t chainidx) |
ab83e314 MC |
550 | { |
551 | int currv, min_version, max_version, reason; | |
552 | ||
b5b993b2 | 553 | reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL); |
88050dd1 MC |
554 | if (reason != 0) { |
555 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
556 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason); | |
557 | return EXT_RETURN_FAIL; | |
558 | } | |
559 | ||
560 | /* | |
561 | * Don't include this if we can't negotiate TLSv1.3. We can do a straight | |
562 | * comparison here because we will never be called in DTLS. | |
563 | */ | |
564 | if (max_version < TLS1_3_VERSION) | |
565 | return EXT_RETURN_NOT_SENT; | |
566 | ||
ab83e314 MC |
567 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions) |
568 | || !WPACKET_start_sub_packet_u16(pkt) | |
569 | || !WPACKET_start_sub_packet_u8(pkt)) { | |
f63a17d6 MC |
570 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
571 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
572 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 573 | return EXT_RETURN_FAIL; |
ab83e314 MC |
574 | } |
575 | ||
ab83e314 | 576 | for (currv = max_version; currv >= min_version; currv--) { |
35e742ec | 577 | if (!WPACKET_put_bytes_u16(pkt, currv)) { |
f63a17d6 MC |
578 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
579 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
580 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 581 | return EXT_RETURN_FAIL; |
ab83e314 MC |
582 | } |
583 | } | |
584 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
585 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
586 | SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, | |
587 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 588 | return EXT_RETURN_FAIL; |
ab83e314 MC |
589 | } |
590 | ||
b186a592 | 591 | return EXT_RETURN_SENT; |
ab83e314 MC |
592 | } |
593 | ||
b2f7e8c0 | 594 | /* |
e3c0d76b | 595 | * Construct a psk_kex_modes extension. |
b2f7e8c0 | 596 | */ |
b186a592 MC |
597 | EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, |
598 | unsigned int context, X509 *x, | |
f63a17d6 | 599 | size_t chainidx) |
b2f7e8c0 MC |
600 | { |
601 | #ifndef OPENSSL_NO_TLS1_3 | |
e3c0d76b MC |
602 | int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX; |
603 | ||
b2f7e8c0 MC |
604 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes) |
605 | || !WPACKET_start_sub_packet_u16(pkt) | |
606 | || !WPACKET_start_sub_packet_u8(pkt) | |
607 | || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE) | |
e3c0d76b | 608 | || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)) |
b2f7e8c0 MC |
609 | || !WPACKET_close(pkt) |
610 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
611 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
612 | SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR); | |
b186a592 | 613 | return EXT_RETURN_FAIL; |
b2f7e8c0 | 614 | } |
b3ad72ce | 615 | |
e3c0d76b MC |
616 | s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE; |
617 | if (nodhe) | |
618 | s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE; | |
b2f7e8c0 MC |
619 | #endif |
620 | ||
b186a592 | 621 | return EXT_RETURN_SENT; |
b2f7e8c0 MC |
622 | } |
623 | ||
3847d426 MC |
624 | #ifndef OPENSSL_NO_TLS1_3 |
625 | static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id) | |
626 | { | |
7b1ec1cf MC |
627 | unsigned char *encoded_point = NULL; |
628 | EVP_PKEY *key_share_key = NULL; | |
3847d426 MC |
629 | size_t encodedlen; |
630 | ||
555cbb32 | 631 | if (s->s3.tmp.pkey != NULL) { |
fc7129dc | 632 | if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) { |
f63a17d6 MC |
633 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, |
634 | ERR_R_INTERNAL_ERROR); | |
d8028b20 | 635 | return 0; |
7b1ec1cf MC |
636 | } |
637 | /* | |
638 | * Could happen if we got an HRR that wasn't requesting a new key_share | |
639 | */ | |
555cbb32 | 640 | key_share_key = s->s3.tmp.pkey; |
7b1ec1cf | 641 | } else { |
f63a17d6 | 642 | key_share_key = ssl_generate_pkey_group(s, curve_id); |
7b1ec1cf | 643 | if (key_share_key == NULL) { |
f63a17d6 | 644 | /* SSLfatal() already called */ |
d8028b20 | 645 | return 0; |
7b1ec1cf | 646 | } |
afce590b RL |
647 | |
648 | /* | |
649 | * TODO(3.0) Remove this when EVP_PKEY_get1_tls_encodedpoint() | |
650 | * knows how to get a key from an encoded point with the help of | |
651 | * a OSSL_SERIALIZER deserializer. We know that EVP_PKEY_get0() | |
652 | * downgrades an EVP_PKEY to contain a legacy key. | |
653 | * | |
654 | * THIS IS TEMPORARY | |
655 | */ | |
656 | EVP_PKEY_get0(key_share_key); | |
657 | if (EVP_PKEY_id(key_share_key) == EVP_PKEY_NONE) { | |
658 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, | |
659 | ERR_R_EC_LIB); | |
660 | goto err; | |
661 | } | |
3847d426 MC |
662 | } |
663 | ||
664 | /* Encode the public key. */ | |
665 | encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key, | |
2248dbeb | 666 | &encoded_point); |
3847d426 | 667 | if (encodedlen == 0) { |
f63a17d6 | 668 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB); |
7b1ec1cf | 669 | goto err; |
3847d426 MC |
670 | } |
671 | ||
672 | /* Create KeyShareEntry */ | |
673 | if (!WPACKET_put_bytes_u16(pkt, curve_id) | |
2248dbeb | 674 | || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) { |
f63a17d6 MC |
675 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, |
676 | ERR_R_INTERNAL_ERROR); | |
7b1ec1cf | 677 | goto err; |
3847d426 MC |
678 | } |
679 | ||
680 | /* | |
681 | * TODO(TLS1.3): When changing to send more than one key_share we're | |
682 | * going to need to be able to save more than one EVP_PKEY. For now | |
683 | * we reuse the existing tmp.pkey | |
684 | */ | |
555cbb32 TS |
685 | s->s3.tmp.pkey = key_share_key; |
686 | s->s3.group_id = curve_id; | |
2248dbeb | 687 | OPENSSL_free(encoded_point); |
3847d426 | 688 | |
d8028b20 | 689 | return 1; |
7b1ec1cf | 690 | err: |
555cbb32 | 691 | if (s->s3.tmp.pkey == NULL) |
7b1ec1cf MC |
692 | EVP_PKEY_free(key_share_key); |
693 | OPENSSL_free(encoded_point); | |
d8028b20 | 694 | return 0; |
3847d426 MC |
695 | } |
696 | #endif | |
697 | ||
b186a592 MC |
698 | EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, |
699 | unsigned int context, X509 *x, | |
f63a17d6 | 700 | size_t chainidx) |
ab83e314 | 701 | { |
3cf96e88 | 702 | #ifndef OPENSSL_NO_TLS1_3 |
f48d826e DSH |
703 | size_t i, num_groups = 0; |
704 | const uint16_t *pgroups = NULL; | |
9e84a42d | 705 | uint16_t curve_id = 0; |
ab83e314 MC |
706 | |
707 | /* key_share extension */ | |
708 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share) | |
709 | /* Extension data sub-packet */ | |
710 | || !WPACKET_start_sub_packet_u16(pkt) | |
711 | /* KeyShare list sub-packet */ | |
712 | || !WPACKET_start_sub_packet_u16(pkt)) { | |
f63a17d6 MC |
713 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
714 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 715 | return EXT_RETURN_FAIL; |
ab83e314 MC |
716 | } |
717 | ||
f48d826e | 718 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
ab83e314 MC |
719 | |
720 | /* | |
721 | * TODO(TLS1.3): Make the number of key_shares sent configurable. For | |
722 | * now, just send one | |
723 | */ | |
555cbb32 TS |
724 | if (s->s3.group_id != 0) { |
725 | curve_id = s->s3.group_id; | |
3847d426 | 726 | } else { |
f48d826e | 727 | for (i = 0; i < num_groups; i++) { |
ab83e314 | 728 | |
dbc6268f | 729 | if (!tls_group_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED)) |
3847d426 | 730 | continue; |
ab83e314 | 731 | |
f48d826e | 732 | curve_id = pgroups[i]; |
3847d426 | 733 | break; |
ab83e314 | 734 | } |
3847d426 | 735 | } |
ab83e314 | 736 | |
3847d426 | 737 | if (curve_id == 0) { |
f63a17d6 MC |
738 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
739 | SSL_R_NO_SUITABLE_KEY_SHARE); | |
b186a592 | 740 | return EXT_RETURN_FAIL; |
ab83e314 MC |
741 | } |
742 | ||
f63a17d6 MC |
743 | if (!add_key_share(s, pkt, curve_id)) { |
744 | /* SSLfatal() already called */ | |
b186a592 | 745 | return EXT_RETURN_FAIL; |
f63a17d6 | 746 | } |
3847d426 | 747 | |
ab83e314 | 748 | if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) { |
f63a17d6 MC |
749 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, |
750 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 751 | return EXT_RETURN_FAIL; |
ab83e314 | 752 | } |
b186a592 | 753 | return EXT_RETURN_SENT; |
aa2ed504 TS |
754 | #else |
755 | return EXT_RETURN_NOT_SENT; | |
756 | #endif | |
ab83e314 MC |
757 | } |
758 | ||
b186a592 | 759 | EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 760 | X509 *x, size_t chainidx) |
cfef5027 | 761 | { |
b186a592 | 762 | EXT_RETURN ret = EXT_RETURN_FAIL; |
cfef5027 MC |
763 | |
764 | /* Should only be set if we've had an HRR */ | |
765 | if (s->ext.tls13_cookie_len == 0) | |
b186a592 | 766 | return EXT_RETURN_NOT_SENT; |
cfef5027 MC |
767 | |
768 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie) | |
769 | /* Extension data sub-packet */ | |
770 | || !WPACKET_start_sub_packet_u16(pkt) | |
771 | || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie, | |
772 | s->ext.tls13_cookie_len) | |
773 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
774 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE, |
775 | ERR_R_INTERNAL_ERROR); | |
cfef5027 MC |
776 | goto end; |
777 | } | |
778 | ||
b186a592 | 779 | ret = EXT_RETURN_SENT; |
cfef5027 MC |
780 | end: |
781 | OPENSSL_free(s->ext.tls13_cookie); | |
febb0afa | 782 | s->ext.tls13_cookie = NULL; |
cfef5027 MC |
783 | s->ext.tls13_cookie_len = 0; |
784 | ||
785 | return ret; | |
786 | } | |
787 | ||
b186a592 MC |
788 | EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, |
789 | unsigned int context, X509 *x, | |
f63a17d6 | 790 | size_t chainidx) |
38df5a45 | 791 | { |
696de86f PW |
792 | #ifndef OPENSSL_NO_PSK |
793 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
794 | #endif /* OPENSSL_NO_PSK */ | |
ccb76685 | 795 | const unsigned char *id = NULL; |
fff202e5 | 796 | size_t idlen = 0; |
add8d0e9 | 797 | SSL_SESSION *psksess = NULL; |
ffc5bbaa | 798 | SSL_SESSION *edsess = NULL; |
add8d0e9 MC |
799 | const EVP_MD *handmd = NULL; |
800 | ||
fc7129dc | 801 | if (s->hello_retry_request == SSL_HRR_PENDING) |
add8d0e9 MC |
802 | handmd = ssl_handshake_md(s); |
803 | ||
804 | if (s->psk_use_session_cb != NULL | |
ffc5bbaa MC |
805 | && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess) |
806 | || (psksess != NULL | |
807 | && psksess->ssl_version != TLS1_3_VERSION))) { | |
808 | SSL_SESSION_free(psksess); | |
f63a17d6 MC |
809 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
810 | SSL_R_BAD_PSK); | |
add8d0e9 MC |
811 | return EXT_RETURN_FAIL; |
812 | } | |
813 | ||
c2b290c3 | 814 | #ifndef OPENSSL_NO_PSK |
f3d40db1 MC |
815 | if (psksess == NULL && s->psk_client_callback != NULL) { |
816 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
817 | size_t psklen = 0; | |
818 | ||
819 | memset(identity, 0, sizeof(identity)); | |
820 | psklen = s->psk_client_callback(s, NULL, identity, sizeof(identity) - 1, | |
821 | psk, sizeof(psk)); | |
822 | ||
823 | if (psklen > PSK_MAX_PSK_LEN) { | |
824 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, | |
825 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
826 | return EXT_RETURN_FAIL; | |
827 | } else if (psklen > 0) { | |
828 | const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 }; | |
829 | const SSL_CIPHER *cipher; | |
830 | ||
831 | idlen = strlen(identity); | |
832 | if (idlen > PSK_MAX_IDENTITY_LEN) { | |
833 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
834 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
835 | ERR_R_INTERNAL_ERROR); | |
836 | return EXT_RETURN_FAIL; | |
837 | } | |
838 | id = (unsigned char *)identity; | |
839 | ||
840 | /* | |
841 | * We found a PSK using an old style callback. We don't know | |
842 | * the digest so we default to SHA256 as per the TLSv1.3 spec | |
843 | */ | |
844 | cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id); | |
845 | if (cipher == NULL) { | |
846 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
847 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
848 | ERR_R_INTERNAL_ERROR); | |
849 | return EXT_RETURN_FAIL; | |
850 | } | |
851 | ||
852 | psksess = SSL_SESSION_new(); | |
853 | if (psksess == NULL | |
854 | || !SSL_SESSION_set1_master_key(psksess, psk, psklen) | |
855 | || !SSL_SESSION_set_cipher(psksess, cipher) | |
856 | || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) { | |
857 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
858 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
859 | ERR_R_INTERNAL_ERROR); | |
860 | OPENSSL_cleanse(psk, psklen); | |
861 | return EXT_RETURN_FAIL; | |
862 | } | |
863 | OPENSSL_cleanse(psk, psklen); | |
864 | } | |
865 | } | |
c2b290c3 | 866 | #endif /* OPENSSL_NO_PSK */ |
f3d40db1 | 867 | |
add8d0e9 MC |
868 | SSL_SESSION_free(s->psksession); |
869 | s->psksession = psksess; | |
870 | if (psksess != NULL) { | |
871 | OPENSSL_free(s->psksession_id); | |
872 | s->psksession_id = OPENSSL_memdup(id, idlen); | |
873 | if (s->psksession_id == NULL) { | |
f63a17d6 MC |
874 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
875 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
add8d0e9 MC |
876 | return EXT_RETURN_FAIL; |
877 | } | |
878 | s->psksession_id_len = idlen; | |
879 | } | |
880 | ||
38df5a45 | 881 | if (s->early_data_state != SSL_EARLY_DATA_CONNECTING |
add8d0e9 MC |
882 | || (s->session->ext.max_early_data == 0 |
883 | && (psksess == NULL || psksess->ext.max_early_data == 0))) { | |
38df5a45 | 884 | s->max_early_data = 0; |
b186a592 | 885 | return EXT_RETURN_NOT_SENT; |
38df5a45 | 886 | } |
ffc5bbaa MC |
887 | edsess = s->session->ext.max_early_data != 0 ? s->session : psksess; |
888 | s->max_early_data = edsess->ext.max_early_data; | |
889 | ||
bfab12bb MC |
890 | if (edsess->ext.hostname != NULL) { |
891 | if (s->ext.hostname == NULL | |
892 | || (s->ext.hostname != NULL | |
893 | && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) { | |
f63a17d6 MC |
894 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
895 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
896 | SSL_R_INCONSISTENT_EARLY_DATA_SNI); | |
bfab12bb MC |
897 | return EXT_RETURN_FAIL; |
898 | } | |
ffc5bbaa MC |
899 | } |
900 | ||
901 | if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) { | |
f63a17d6 MC |
902 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
903 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
ffc5bbaa MC |
904 | return EXT_RETURN_FAIL; |
905 | } | |
906 | ||
907 | /* | |
908 | * Verify that we are offering an ALPN protocol consistent with the early | |
909 | * data. | |
910 | */ | |
911 | if (edsess->ext.alpn_selected != NULL) { | |
912 | PACKET prots, alpnpkt; | |
913 | int found = 0; | |
914 | ||
915 | if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) { | |
f63a17d6 MC |
916 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
917 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR); | |
ffc5bbaa MC |
918 | return EXT_RETURN_FAIL; |
919 | } | |
920 | while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) { | |
921 | if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected, | |
922 | edsess->ext.alpn_selected_len)) { | |
923 | found = 1; | |
924 | break; | |
925 | } | |
926 | } | |
927 | if (!found) { | |
f63a17d6 MC |
928 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
929 | SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, | |
930 | SSL_R_INCONSISTENT_EARLY_DATA_ALPN); | |
ffc5bbaa MC |
931 | return EXT_RETURN_FAIL; |
932 | } | |
933 | } | |
38df5a45 MC |
934 | |
935 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data) | |
936 | || !WPACKET_start_sub_packet_u16(pkt) | |
937 | || !WPACKET_close(pkt)) { | |
f63a17d6 MC |
938 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, |
939 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 940 | return EXT_RETURN_FAIL; |
38df5a45 MC |
941 | } |
942 | ||
943 | /* | |
944 | * We set this to rejected here. Later, if the server acknowledges the | |
945 | * extension, we set it to accepted. | |
946 | */ | |
947 | s->ext.early_data = SSL_EARLY_DATA_REJECTED; | |
4be3a7c7 | 948 | s->ext.early_data_ok = 1; |
38df5a45 | 949 | |
b186a592 | 950 | return EXT_RETURN_SENT; |
38df5a45 MC |
951 | } |
952 | ||
1266eefd MC |
953 | #define F5_WORKAROUND_MIN_MSG_LEN 0xff |
954 | #define F5_WORKAROUND_MAX_MSG_LEN 0x200 | |
955 | ||
d702ad12 MC |
956 | /* |
957 | * PSK pre binder overhead = | |
958 | * 2 bytes for TLSEXT_TYPE_psk | |
959 | * 2 bytes for extension length | |
960 | * 2 bytes for identities list length | |
961 | * 2 bytes for identity length | |
962 | * 4 bytes for obfuscated_ticket_age | |
963 | * 2 bytes for binder list length | |
964 | * 1 byte for binder length | |
965 | * The above excludes the number of bytes for the identity itself and the | |
966 | * subsequent binder bytes | |
967 | */ | |
968 | #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1) | |
969 | ||
b186a592 MC |
970 | EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt, |
971 | unsigned int context, X509 *x, | |
f63a17d6 | 972 | size_t chainidx) |
ab83e314 MC |
973 | { |
974 | unsigned char *padbytes; | |
975 | size_t hlen; | |
976 | ||
977 | if ((s->options & SSL_OP_TLSEXT_PADDING) == 0) | |
b186a592 | 978 | return EXT_RETURN_NOT_SENT; |
ab83e314 MC |
979 | |
980 | /* | |
d702ad12 MC |
981 | * Add padding to workaround bugs in F5 terminators. See RFC7685. |
982 | * This code calculates the length of all extensions added so far but | |
983 | * excludes the PSK extension (because that MUST be written last). Therefore | |
984 | * this extension MUST always appear second to last. | |
ab83e314 MC |
985 | */ |
986 | if (!WPACKET_get_total_written(pkt, &hlen)) { | |
f63a17d6 MC |
987 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING, |
988 | ERR_R_INTERNAL_ERROR); | |
b186a592 | 989 | return EXT_RETURN_FAIL; |
ab83e314 MC |
990 | } |
991 | ||
d702ad12 MC |
992 | /* |
993 | * If we're going to send a PSK then that will be written out after this | |
994 | * extension, so we need to calculate how long it is going to be. | |
995 | */ | |
996 | if (s->session->ssl_version == TLS1_3_VERSION | |
997 | && s->session->ext.ticklen != 0 | |
998 | && s->session->cipher != NULL) { | |
c8f6c28a | 999 | const EVP_MD *md = ssl_md(s->ctx, s->session->cipher->algorithm2); |
d702ad12 MC |
1000 | |
1001 | if (md != NULL) { | |
1002 | /* | |
1003 | * Add the fixed PSK overhead, the identity length and the binder | |
1004 | * length. | |
1005 | */ | |
1006 | hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen | |
1007 | + EVP_MD_size(md); | |
1008 | } | |
1009 | } | |
1010 | ||
1266eefd | 1011 | if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) { |
1ee4b98e | 1012 | /* Calculate the amount of padding we need to add */ |
1266eefd MC |
1013 | hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen; |
1014 | ||
1015 | /* | |
1016 | * Take off the size of extension header itself (2 bytes for type and | |
10ed1b72 TS |
1017 | * 2 bytes for length bytes), but ensure that the extension is at least |
1018 | * 1 byte long so as not to have an empty extension last (WebSphere 7.x, | |
1019 | * 8.x are intolerant of that condition) | |
1266eefd | 1020 | */ |
3d85c7f4 | 1021 | if (hlen > 4) |
ab83e314 MC |
1022 | hlen -= 4; |
1023 | else | |
10ed1b72 | 1024 | hlen = 1; |
ab83e314 MC |
1025 | |
1026 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding) | |
1027 | || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) { | |
f63a17d6 MC |
1028 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING, |
1029 | ERR_R_INTERNAL_ERROR); | |
eb5fd03b | 1030 | return EXT_RETURN_FAIL; |
ab83e314 MC |
1031 | } |
1032 | memset(padbytes, 0, hlen); | |
1033 | } | |
1034 | ||
b186a592 | 1035 | return EXT_RETURN_SENT; |
ab83e314 MC |
1036 | } |
1037 | ||
ec15acb6 MC |
1038 | /* |
1039 | * Construct the pre_shared_key extension | |
1040 | */ | |
b186a592 | 1041 | EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, |
f63a17d6 | 1042 | X509 *x, size_t chainidx) |
ec15acb6 MC |
1043 | { |
1044 | #ifndef OPENSSL_NO_TLS1_3 | |
15b1688a | 1045 | uint32_t now, agesec, agems = 0; |
add8d0e9 | 1046 | size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen; |
9368f865 | 1047 | unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL; |
15b1688a | 1048 | const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL; |
9368f865 | 1049 | int dores = 0; |
ec15acb6 | 1050 | |
c96ce52c | 1051 | s->ext.tick_identity = 0; |
ec15acb6 | 1052 | |
d702ad12 MC |
1053 | /* |
1054 | * Note: At this stage of the code we only support adding a single | |
1055 | * resumption PSK. If we add support for multiple PSKs then the length | |
1056 | * calculations in the padding extension will need to be adjusted. | |
1057 | */ | |
1058 | ||
ec15acb6 | 1059 | /* |
08191294 MC |
1060 | * If this is an incompatible or new session then we have nothing to resume |
1061 | * so don't add this extension. | |
ec15acb6 | 1062 | */ |
08191294 | 1063 | if (s->session->ssl_version != TLS1_3_VERSION |
add8d0e9 | 1064 | || (s->session->ext.ticklen == 0 && s->psksession == NULL)) |
b186a592 | 1065 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1066 | |
fc7129dc | 1067 | if (s->hello_retry_request == SSL_HRR_PENDING) |
9368f865 MC |
1068 | handmd = ssl_handshake_md(s); |
1069 | ||
9368f865 | 1070 | if (s->session->ext.ticklen != 0) { |
72257204 | 1071 | /* Get the digest associated with the ciphersuite in the session */ |
9368f865 | 1072 | if (s->session->cipher == NULL) { |
f63a17d6 MC |
1073 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1074 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1075 | return EXT_RETURN_FAIL; |
9368f865 | 1076 | } |
c8f6c28a | 1077 | mdres = ssl_md(s->ctx, s->session->cipher->algorithm2); |
9368f865 | 1078 | if (mdres == NULL) { |
72257204 MC |
1079 | /* |
1080 | * Don't recognize this cipher so we can't use the session. | |
1081 | * Ignore it | |
1082 | */ | |
9368f865 MC |
1083 | goto dopsksess; |
1084 | } | |
1085 | ||
fc7129dc | 1086 | if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) { |
9368f865 | 1087 | /* |
72257204 MC |
1088 | * Selected ciphersuite hash does not match the hash for the session |
1089 | * so we can't use it. | |
9368f865 MC |
1090 | */ |
1091 | goto dopsksess; | |
1092 | } | |
1f5b44e9 | 1093 | |
cf3e221b | 1094 | /* |
9368f865 | 1095 | * Technically the C standard just says time() returns a time_t and says |
72257204 MC |
1096 | * nothing about the encoding of that type. In practice most |
1097 | * implementations follow POSIX which holds it as an integral type in | |
1098 | * seconds since epoch. We've already made the assumption that we can do | |
1099 | * this in multiple places in the code, so portability shouldn't be an | |
1100 | * issue. | |
cf3e221b | 1101 | */ |
9368f865 MC |
1102 | now = (uint32_t)time(NULL); |
1103 | agesec = now - (uint32_t)s->session->time; | |
7e70213f MC |
1104 | /* |
1105 | * We calculate the age in seconds but the server may work in ms. Due to | |
1106 | * rounding errors we could overestimate the age by up to 1s. It is | |
1107 | * better to underestimate it. Otherwise, if the RTT is very short, when | |
1108 | * the server calculates the age reported by the client it could be | |
1109 | * bigger than the age calculated on the server - which should never | |
1110 | * happen. | |
1111 | */ | |
1112 | if (agesec > 0) | |
1113 | agesec--; | |
cf3e221b | 1114 | |
9368f865 MC |
1115 | if (s->session->ext.tick_lifetime_hint < agesec) { |
1116 | /* Ticket is too old. Ignore it. */ | |
1117 | goto dopsksess; | |
1118 | } | |
ec15acb6 | 1119 | |
9368f865 MC |
1120 | /* |
1121 | * Calculate age in ms. We're just doing it to nearest second. Should be | |
1122 | * good enough. | |
1123 | */ | |
1124 | agems = agesec * (uint32_t)1000; | |
fc24f0bf | 1125 | |
9368f865 MC |
1126 | if (agesec != 0 && agems / (uint32_t)1000 != agesec) { |
1127 | /* | |
72257204 MC |
1128 | * Overflow. Shouldn't happen unless this is a *really* old session. |
1129 | * If so we just ignore it. | |
9368f865 MC |
1130 | */ |
1131 | goto dopsksess; | |
1132 | } | |
ec15acb6 | 1133 | |
ec15acb6 | 1134 | /* |
72257204 MC |
1135 | * Obfuscate the age. Overflow here is fine, this addition is supposed |
1136 | * to be mod 2^32. | |
ec15acb6 | 1137 | */ |
9368f865 MC |
1138 | agems += s->session->ext.tick_age_add; |
1139 | ||
1140 | reshashsize = EVP_MD_size(mdres); | |
c96ce52c | 1141 | s->ext.tick_identity++; |
9368f865 | 1142 | dores = 1; |
ec15acb6 MC |
1143 | } |
1144 | ||
9368f865 | 1145 | dopsksess: |
add8d0e9 | 1146 | if (!dores && s->psksession == NULL) |
9368f865 | 1147 | return EXT_RETURN_NOT_SENT; |
ec15acb6 | 1148 | |
add8d0e9 | 1149 | if (s->psksession != NULL) { |
c8f6c28a | 1150 | mdpsk = ssl_md(s->ctx, s->psksession->cipher->algorithm2); |
9368f865 MC |
1151 | if (mdpsk == NULL) { |
1152 | /* | |
1153 | * Don't recognize this cipher so we can't use the session. | |
1154 | * If this happens it's an application bug. | |
1155 | */ | |
f63a17d6 MC |
1156 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1157 | SSL_R_BAD_PSK); | |
635c8f77 | 1158 | return EXT_RETURN_FAIL; |
9368f865 MC |
1159 | } |
1160 | ||
fc7129dc | 1161 | if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) { |
9368f865 MC |
1162 | /* |
1163 | * Selected ciphersuite hash does not match the hash for the PSK | |
1164 | * session. This is an application bug. | |
1165 | */ | |
f63a17d6 MC |
1166 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1167 | SSL_R_BAD_PSK); | |
635c8f77 | 1168 | return EXT_RETURN_FAIL; |
9368f865 MC |
1169 | } |
1170 | ||
1171 | pskhashsize = EVP_MD_size(mdpsk); | |
1172 | } | |
ec15acb6 MC |
1173 | |
1174 | /* Create the extension, but skip over the binder for now */ | |
1175 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk) | |
1176 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 | 1177 | || !WPACKET_start_sub_packet_u16(pkt)) { |
f63a17d6 MC |
1178 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1179 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1180 | return EXT_RETURN_FAIL; |
9368f865 MC |
1181 | } |
1182 | ||
1183 | if (dores) { | |
1184 | if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, | |
1185 | s->session->ext.ticklen) | |
1186 | || !WPACKET_put_bytes_u32(pkt, agems)) { | |
f63a17d6 MC |
1187 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1188 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1189 | return EXT_RETURN_FAIL; |
9368f865 MC |
1190 | } |
1191 | } | |
1192 | ||
add8d0e9 MC |
1193 | if (s->psksession != NULL) { |
1194 | if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id, | |
1195 | s->psksession_id_len) | |
9368f865 | 1196 | || !WPACKET_put_bytes_u32(pkt, 0)) { |
f63a17d6 MC |
1197 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1198 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1199 | return EXT_RETURN_FAIL; |
9368f865 | 1200 | } |
c96ce52c | 1201 | s->ext.tick_identity++; |
9368f865 MC |
1202 | } |
1203 | ||
1204 | if (!WPACKET_close(pkt) | |
ec15acb6 MC |
1205 | || !WPACKET_get_total_written(pkt, &binderoffset) |
1206 | || !WPACKET_start_sub_packet_u16(pkt) | |
9368f865 MC |
1207 | || (dores |
1208 | && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder)) | |
add8d0e9 | 1209 | || (s->psksession != NULL |
9368f865 | 1210 | && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder)) |
ec15acb6 MC |
1211 | || !WPACKET_close(pkt) |
1212 | || !WPACKET_close(pkt) | |
1213 | || !WPACKET_get_total_written(pkt, &msglen) | |
1214 | /* | |
1215 | * We need to fill in all the sub-packet lengths now so we can | |
1216 | * calculate the HMAC of the message up to the binders | |
1217 | */ | |
1218 | || !WPACKET_fill_lengths(pkt)) { | |
f63a17d6 MC |
1219 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK, |
1220 | ERR_R_INTERNAL_ERROR); | |
635c8f77 | 1221 | return EXT_RETURN_FAIL; |
ec15acb6 MC |
1222 | } |
1223 | ||
1224 | msgstart = WPACKET_get_curr(pkt) - msglen; | |
1225 | ||
72257204 MC |
1226 | if (dores |
1227 | && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL, | |
1228 | resbinder, s->session, 1, 0) != 1) { | |
635c8f77 MC |
1229 | /* SSLfatal() already called */ |
1230 | return EXT_RETURN_FAIL; | |
ec15acb6 MC |
1231 | } |
1232 | ||
add8d0e9 | 1233 | if (s->psksession != NULL |
72257204 | 1234 | && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL, |
add8d0e9 | 1235 | pskbinder, s->psksession, 1, 1) != 1) { |
635c8f77 MC |
1236 | /* SSLfatal() already called */ |
1237 | return EXT_RETURN_FAIL; | |
9368f865 MC |
1238 | } |
1239 | ||
635c8f77 | 1240 | return EXT_RETURN_SENT; |
ec15acb6 | 1241 | #else |
89bc9cf6 | 1242 | return EXT_RETURN_NOT_SENT; |
ec15acb6 MC |
1243 | #endif |
1244 | } | |
1245 | ||
9d75dce3 TS |
1246 | EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, |
1247 | unsigned int context, | |
1248 | X509 *x, size_t chainidx) | |
1249 | { | |
1250 | #ifndef OPENSSL_NO_TLS1_3 | |
32097b33 MC |
1251 | if (!s->pha_enabled) |
1252 | return EXT_RETURN_NOT_SENT; | |
9d75dce3 TS |
1253 | |
1254 | /* construct extension - 0 length, no contents */ | |
1255 | if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth) | |
1256 | || !WPACKET_start_sub_packet_u16(pkt) | |
1257 | || !WPACKET_close(pkt)) { | |
1258 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, | |
1259 | SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH, | |
1260 | ERR_R_INTERNAL_ERROR); | |
1261 | return EXT_RETURN_FAIL; | |
1262 | } | |
1263 | ||
1264 | s->post_handshake_auth = SSL_PHA_EXT_SENT; | |
1265 | ||
1266 | return EXT_RETURN_SENT; | |
1267 | #else | |
1268 | return EXT_RETURN_NOT_SENT; | |
1269 | #endif | |
1270 | } | |
1271 | ||
1272 | ||
6dd083fd MC |
1273 | /* |
1274 | * Parse the server's renegotiation binding and abort if it's not right | |
1275 | */ | |
61138358 | 1276 | int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1277 | X509 *x, size_t chainidx) |
6dd083fd | 1278 | { |
555cbb32 TS |
1279 | size_t expected_len = s->s3.previous_client_finished_len |
1280 | + s->s3.previous_server_finished_len; | |
6dd083fd MC |
1281 | size_t ilen; |
1282 | const unsigned char *data; | |
1283 | ||
1284 | /* Check for logic errors */ | |
b77f3ed1 | 1285 | if (!ossl_assert(expected_len == 0 |
555cbb32 | 1286 | || s->s3.previous_client_finished_len != 0) |
b77f3ed1 | 1287 | || !ossl_assert(expected_len == 0 |
555cbb32 | 1288 | || s->s3.previous_server_finished_len != 0)) { |
f63a17d6 MC |
1289 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1290 | ERR_R_INTERNAL_ERROR); | |
b77f3ed1 MC |
1291 | return 0; |
1292 | } | |
6dd083fd MC |
1293 | |
1294 | /* Parse the length byte */ | |
1295 | if (!PACKET_get_1_len(pkt, &ilen)) { | |
f63a17d6 MC |
1296 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1297 | SSL_R_RENEGOTIATION_ENCODING_ERR); | |
6dd083fd MC |
1298 | return 0; |
1299 | } | |
1300 | ||
1301 | /* Consistency check */ | |
1302 | if (PACKET_remaining(pkt) != ilen) { | |
f63a17d6 MC |
1303 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1304 | SSL_R_RENEGOTIATION_ENCODING_ERR); | |
6dd083fd MC |
1305 | return 0; |
1306 | } | |
1307 | ||
1308 | /* Check that the extension matches */ | |
1309 | if (ilen != expected_len) { | |
f63a17d6 MC |
1310 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1311 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1312 | return 0; |
1313 | } | |
1314 | ||
555cbb32 TS |
1315 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_client_finished_len) |
1316 | || memcmp(data, s->s3.previous_client_finished, | |
1317 | s->s3.previous_client_finished_len) != 0) { | |
f63a17d6 MC |
1318 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1319 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1320 | return 0; |
1321 | } | |
1322 | ||
555cbb32 TS |
1323 | if (!PACKET_get_bytes(pkt, &data, s->s3.previous_server_finished_len) |
1324 | || memcmp(data, s->s3.previous_server_finished, | |
1325 | s->s3.previous_server_finished_len) != 0) { | |
f63a17d6 MC |
1326 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE, |
1327 | SSL_R_RENEGOTIATION_MISMATCH); | |
6dd083fd MC |
1328 | return 0; |
1329 | } | |
555cbb32 | 1330 | s->s3.send_connection_binding = 1; |
6dd083fd MC |
1331 | |
1332 | return 1; | |
1333 | } | |
1334 | ||
cf72c757 F |
1335 | /* Parse the server's max fragment len extension packet */ |
1336 | int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context, | |
f63a17d6 | 1337 | X509 *x, size_t chainidx) |
cf72c757 F |
1338 | { |
1339 | unsigned int value; | |
1340 | ||
1341 | if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) { | |
56d36288 | 1342 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, |
f63a17d6 | 1343 | SSL_R_BAD_EXTENSION); |
cf72c757 F |
1344 | return 0; |
1345 | } | |
1346 | ||
1347 | /* |value| should contains a valid max-fragment-length code. */ | |
1348 | if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) { | |
f63a17d6 MC |
1349 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1350 | SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, | |
1351 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
1352 | return 0; |
1353 | } | |
1354 | ||
1355 | /* Must be the same value as client-configured one who was sent to server */ | |
1356 | /*- | |
1357 | * RFC 6066: if a client receives a maximum fragment length negotiation | |
1358 | * response that differs from the length it requested, ... | |
1359 | * It must abort with SSL_AD_ILLEGAL_PARAMETER alert | |
1360 | */ | |
1361 | if (value != s->ext.max_fragment_len_mode) { | |
f63a17d6 MC |
1362 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1363 | SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN, | |
1364 | SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH); | |
cf72c757 F |
1365 | return 0; |
1366 | } | |
1367 | ||
1368 | /* | |
1369 | * Maximum Fragment Length Negotiation succeeded. | |
1370 | * The negotiated Maximum Fragment Length is binding now. | |
1371 | */ | |
1372 | s->session->ext.max_fragment_len_mode = value; | |
1373 | ||
1374 | return 1; | |
1375 | } | |
1376 | ||
61138358 | 1377 | int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1378 | X509 *x, size_t chainidx) |
6dd083fd | 1379 | { |
fb34a0f4 | 1380 | if (s->ext.hostname == NULL) { |
f63a17d6 MC |
1381 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1382 | ERR_R_INTERNAL_ERROR); | |
fb34a0f4 MC |
1383 | return 0; |
1384 | } | |
1385 | ||
1386 | if (PACKET_remaining(pkt) > 0) { | |
f63a17d6 MC |
1387 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1388 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1389 | return 0; |
1390 | } | |
1391 | ||
1392 | if (!s->hit) { | |
aff8c126 | 1393 | if (s->session->ext.hostname != NULL) { |
f63a17d6 MC |
1394 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1395 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1396 | return 0; |
1397 | } | |
aff8c126 RS |
1398 | s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname); |
1399 | if (s->session->ext.hostname == NULL) { | |
f63a17d6 MC |
1400 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME, |
1401 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1402 | return 0; |
1403 | } | |
1404 | } | |
1405 | ||
1406 | return 1; | |
1407 | } | |
1408 | ||
1409 | #ifndef OPENSSL_NO_EC | |
61138358 | 1410 | int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1411 | X509 *x, size_t chainidx) |
6dd083fd | 1412 | { |
848a950b | 1413 | size_t ecpointformats_len; |
6dd083fd MC |
1414 | PACKET ecptformatlist; |
1415 | ||
1416 | if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) { | |
f63a17d6 MC |
1417 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, |
1418 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1419 | return 0; |
1420 | } | |
1421 | if (!s->hit) { | |
aff8c126 | 1422 | ecpointformats_len = PACKET_remaining(&ecptformatlist); |
848a950b MC |
1423 | if (ecpointformats_len == 0) { |
1424 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
1425 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, SSL_R_BAD_LENGTH); | |
1426 | return 0; | |
1427 | } | |
6dd083fd | 1428 | |
cd0fb43c MC |
1429 | s->ext.peer_ecpointformats_len = 0; |
1430 | OPENSSL_free(s->ext.peer_ecpointformats); | |
1431 | s->ext.peer_ecpointformats = OPENSSL_malloc(ecpointformats_len); | |
1432 | if (s->ext.peer_ecpointformats == NULL) { | |
f63a17d6 MC |
1433 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1434 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1435 | return 0; |
1436 | } | |
1437 | ||
cd0fb43c | 1438 | s->ext.peer_ecpointformats_len = ecpointformats_len; |
6dd083fd MC |
1439 | |
1440 | if (!PACKET_copy_bytes(&ecptformatlist, | |
cd0fb43c | 1441 | s->ext.peer_ecpointformats, |
aff8c126 | 1442 | ecpointformats_len)) { |
f63a17d6 MC |
1443 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, |
1444 | SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1445 | return 0; |
1446 | } | |
1447 | } | |
1448 | ||
1449 | return 1; | |
1450 | } | |
1451 | #endif | |
1452 | ||
61138358 | 1453 | int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1454 | X509 *x, size_t chainidx) |
6dd083fd | 1455 | { |
aff8c126 RS |
1456 | if (s->ext.session_ticket_cb != NULL && |
1457 | !s->ext.session_ticket_cb(s, PACKET_data(pkt), | |
1458 | PACKET_remaining(pkt), | |
1459 | s->ext.session_ticket_cb_arg)) { | |
f63a17d6 MC |
1460 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, |
1461 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1462 | return 0; |
1463 | } | |
1266eefd | 1464 | |
fb34a0f4 | 1465 | if (!tls_use_ticket(s)) { |
f63a17d6 MC |
1466 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, |
1467 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1468 | return 0; |
1469 | } | |
fb34a0f4 | 1470 | if (PACKET_remaining(pkt) > 0) { |
f63a17d6 MC |
1471 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1472 | SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION); | |
fb34a0f4 MC |
1473 | return 0; |
1474 | } | |
1266eefd | 1475 | |
aff8c126 | 1476 | s->ext.ticket_expected = 1; |
6dd083fd MC |
1477 | |
1478 | return 1; | |
1479 | } | |
1480 | ||
ab83e314 | 1481 | #ifndef OPENSSL_NO_OCSP |
61138358 | 1482 | int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1483 | X509 *x, size_t chainidx) |
6dd083fd | 1484 | { |
5de683d2 MC |
1485 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1486 | /* We ignore this if the server sends a CertificateRequest */ | |
1487 | /* TODO(TLS1.3): Add support for this */ | |
1488 | return 1; | |
1489 | } | |
1490 | ||
6dd083fd | 1491 | /* |
f63e4288 MC |
1492 | * MUST only be sent if we've requested a status |
1493 | * request message. In TLS <= 1.2 it must also be empty. | |
6dd083fd | 1494 | */ |
fb34a0f4 | 1495 | if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) { |
f63a17d6 MC |
1496 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, |
1497 | SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1498 | return 0; |
1499 | } | |
fb34a0f4 | 1500 | if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) { |
f63a17d6 MC |
1501 | SSLfatal(s, SSL_AD_DECODE_ERROR, |
1502 | SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION); | |
fb34a0f4 MC |
1503 | return 0; |
1504 | } | |
f63e4288 MC |
1505 | |
1506 | if (SSL_IS_TLS13(s)) { | |
1507 | /* We only know how to handle this if it's for the first Certificate in | |
1ee4b98e | 1508 | * the chain. We ignore any other responses. |
f63e4288 | 1509 | */ |
8521ced6 | 1510 | if (chainidx != 0) |
f63e4288 | 1511 | return 1; |
f63a17d6 MC |
1512 | |
1513 | /* SSLfatal() already called */ | |
1514 | return tls_process_cert_status_body(s, pkt); | |
f63e4288 MC |
1515 | } |
1516 | ||
6dd083fd | 1517 | /* Set flag to expect CertificateStatus message */ |
aff8c126 | 1518 | s->ext.status_expected = 1; |
6dd083fd MC |
1519 | |
1520 | return 1; | |
1521 | } | |
ab83e314 | 1522 | #endif |
6dd083fd MC |
1523 | |
1524 | ||
1525 | #ifndef OPENSSL_NO_CT | |
61138358 | 1526 | int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1527 | size_t chainidx) |
6dd083fd | 1528 | { |
5de683d2 MC |
1529 | if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) { |
1530 | /* We ignore this if the server sends it in a CertificateRequest */ | |
1531 | /* TODO(TLS1.3): Add support for this */ | |
1532 | return 1; | |
1533 | } | |
1534 | ||
6dd083fd MC |
1535 | /* |
1536 | * Only take it if we asked for it - i.e if there is no CT validation | |
1537 | * callback set, then a custom extension MAY be processing it, so we | |
1538 | * need to let control continue to flow to that. | |
1539 | */ | |
1540 | if (s->ct_validation_callback != NULL) { | |
1541 | size_t size = PACKET_remaining(pkt); | |
1542 | ||
1543 | /* Simply copy it off for later processing */ | |
aff8c126 RS |
1544 | OPENSSL_free(s->ext.scts); |
1545 | s->ext.scts = NULL; | |
1266eefd | 1546 | |
3a63c0ed | 1547 | s->ext.scts_len = (uint16_t)size; |
6dd083fd | 1548 | if (size > 0) { |
aff8c126 RS |
1549 | s->ext.scts = OPENSSL_malloc(size); |
1550 | if (s->ext.scts == NULL | |
1551 | || !PACKET_copy_bytes(pkt, s->ext.scts, size)) { | |
f63a17d6 MC |
1552 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SCT, |
1553 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1554 | return 0; |
1555 | } | |
1556 | } | |
1557 | } else { | |
b186a592 MC |
1558 | ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0 |
1559 | ? ENDPOINT_CLIENT : ENDPOINT_BOTH; | |
1560 | ||
1561 | /* | |
1562 | * If we didn't ask for it then there must be a custom extension, | |
1563 | * otherwise this is unsolicited. | |
1564 | */ | |
1565 | if (custom_ext_find(&s->cert->custext, role, | |
1566 | TLSEXT_TYPE_signed_certificate_timestamp, | |
1567 | NULL) == NULL) { | |
f63a17d6 MC |
1568 | SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_SCT, |
1569 | SSL_R_BAD_EXTENSION); | |
b186a592 MC |
1570 | return 0; |
1571 | } | |
1572 | ||
f63a17d6 | 1573 | if (!custom_ext_parse(s, context, |
43ae5eed MC |
1574 | TLSEXT_TYPE_signed_certificate_timestamp, |
1575 | PACKET_data(pkt), PACKET_remaining(pkt), | |
f63a17d6 MC |
1576 | x, chainidx)) { |
1577 | /* SSLfatal already called */ | |
6dd083fd | 1578 | return 0; |
f63a17d6 | 1579 | } |
6dd083fd MC |
1580 | } |
1581 | ||
1582 | return 1; | |
1583 | } | |
1584 | #endif | |
1585 | ||
1586 | ||
1587 | #ifndef OPENSSL_NO_NEXTPROTONEG | |
1588 | /* | |
1589 | * ssl_next_proto_validate validates a Next Protocol Negotiation block. No | |
1590 | * elements of zero length are allowed and the set of elements must exactly | |
1591 | * fill the length of the block. Returns 1 on success or 0 on failure. | |
1592 | */ | |
f63a17d6 | 1593 | static int ssl_next_proto_validate(SSL *s, PACKET *pkt) |
6dd083fd MC |
1594 | { |
1595 | PACKET tmp_protocol; | |
1596 | ||
1597 | while (PACKET_remaining(pkt)) { | |
1598 | if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol) | |
f63a17d6 MC |
1599 | || PACKET_remaining(&tmp_protocol) == 0) { |
1600 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_NEXT_PROTO_VALIDATE, | |
1601 | SSL_R_BAD_EXTENSION); | |
6dd083fd | 1602 | return 0; |
f63a17d6 | 1603 | } |
6dd083fd MC |
1604 | } |
1605 | ||
1606 | return 1; | |
1607 | } | |
1608 | ||
61138358 | 1609 | int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1610 | size_t chainidx) |
6dd083fd MC |
1611 | { |
1612 | unsigned char *selected; | |
1613 | unsigned char selected_len; | |
1614 | PACKET tmppkt; | |
1615 | ||
1266eefd | 1616 | /* Check if we are in a renegotiation. If so ignore this extension */ |
c7f47786 | 1617 | if (!SSL_IS_FIRST_HANDSHAKE(s)) |
6dd083fd MC |
1618 | return 1; |
1619 | ||
1620 | /* We must have requested it. */ | |
aff8c126 | 1621 | if (s->ctx->ext.npn_select_cb == NULL) { |
f63a17d6 MC |
1622 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_NPN, |
1623 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1624 | return 0; |
1625 | } | |
1266eefd | 1626 | |
6dd083fd MC |
1627 | /* The data must be valid */ |
1628 | tmppkt = *pkt; | |
f63a17d6 MC |
1629 | if (!ssl_next_proto_validate(s, &tmppkt)) { |
1630 | /* SSLfatal() already called */ | |
6dd083fd MC |
1631 | return 0; |
1632 | } | |
aff8c126 RS |
1633 | if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len, |
1634 | PACKET_data(pkt), | |
1635 | PACKET_remaining(pkt), | |
1636 | s->ctx->ext.npn_select_cb_arg) != | |
6dd083fd | 1637 | SSL_TLSEXT_ERR_OK) { |
f63a17d6 MC |
1638 | SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_STOC_NPN, |
1639 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1640 | return 0; |
1641 | } | |
1266eefd | 1642 | |
6dd083fd MC |
1643 | /* |
1644 | * Could be non-NULL if server has sent multiple NPN extensions in | |
1645 | * a single Serverhello | |
1646 | */ | |
aff8c126 RS |
1647 | OPENSSL_free(s->ext.npn); |
1648 | s->ext.npn = OPENSSL_malloc(selected_len); | |
1649 | if (s->ext.npn == NULL) { | |
f63a17d6 MC |
1650 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_NPN, |
1651 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1652 | return 0; |
1653 | } | |
1654 | ||
aff8c126 RS |
1655 | memcpy(s->ext.npn, selected, selected_len); |
1656 | s->ext.npn_len = selected_len; | |
555cbb32 | 1657 | s->s3.npn_seen = 1; |
6dd083fd MC |
1658 | |
1659 | return 1; | |
1660 | } | |
1661 | #endif | |
1662 | ||
61138358 | 1663 | int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1664 | size_t chainidx) |
6dd083fd MC |
1665 | { |
1666 | size_t len; | |
1667 | ||
1668 | /* We must have requested it. */ | |
555cbb32 | 1669 | if (!s->s3.alpn_sent) { |
f63a17d6 MC |
1670 | SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_ALPN, |
1671 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1672 | return 0; |
1673 | } | |
1674 | /*- | |
1675 | * The extension data consists of: | |
1676 | * uint16 list_length | |
1677 | * uint8 proto_length; | |
1678 | * uint8 proto[proto_length]; | |
1679 | */ | |
1680 | if (!PACKET_get_net_2_len(pkt, &len) | |
1681 | || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len) | |
1682 | || PACKET_remaining(pkt) != len) { | |
f63a17d6 MC |
1683 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1684 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1685 | return 0; |
1686 | } | |
555cbb32 TS |
1687 | OPENSSL_free(s->s3.alpn_selected); |
1688 | s->s3.alpn_selected = OPENSSL_malloc(len); | |
1689 | if (s->s3.alpn_selected == NULL) { | |
f63a17d6 MC |
1690 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1691 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1692 | return 0; |
1693 | } | |
555cbb32 | 1694 | if (!PACKET_copy_bytes(pkt, s->s3.alpn_selected, len)) { |
f63a17d6 MC |
1695 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1696 | SSL_R_BAD_EXTENSION); | |
6dd083fd MC |
1697 | return 0; |
1698 | } | |
555cbb32 | 1699 | s->s3.alpn_selected_len = len; |
6dd083fd | 1700 | |
0ef28021 MC |
1701 | if (s->session->ext.alpn_selected == NULL |
1702 | || s->session->ext.alpn_selected_len != len | |
555cbb32 | 1703 | || memcmp(s->session->ext.alpn_selected, s->s3.alpn_selected, len) |
0ef28021 | 1704 | != 0) { |
4be3a7c7 MC |
1705 | /* ALPN not consistent with the old session so cannot use early_data */ |
1706 | s->ext.early_data_ok = 0; | |
1707 | } | |
1708 | if (!s->hit) { | |
9d5db9c9 MC |
1709 | /* |
1710 | * This is a new session and so alpn_selected should have been | |
1711 | * initialised to NULL. We should update it with the selected ALPN. | |
1712 | */ | |
1713 | if (!ossl_assert(s->session->ext.alpn_selected == NULL)) { | |
1714 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, | |
1715 | ERR_R_INTERNAL_ERROR); | |
1716 | return 0; | |
1717 | } | |
4be3a7c7 | 1718 | s->session->ext.alpn_selected = |
555cbb32 | 1719 | OPENSSL_memdup(s->s3.alpn_selected, s->s3.alpn_selected_len); |
4be3a7c7 | 1720 | if (s->session->ext.alpn_selected == NULL) { |
f63a17d6 MC |
1721 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN, |
1722 | ERR_R_INTERNAL_ERROR); | |
4be3a7c7 MC |
1723 | return 0; |
1724 | } | |
555cbb32 | 1725 | s->session->ext.alpn_selected_len = s->s3.alpn_selected_len; |
ae8d7d99 MC |
1726 | } |
1727 | ||
6dd083fd MC |
1728 | return 1; |
1729 | } | |
1730 | ||
1731 | #ifndef OPENSSL_NO_SRTP | |
61138358 | 1732 | int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1733 | size_t chainidx) |
6dd083fd MC |
1734 | { |
1735 | unsigned int id, ct, mki; | |
1736 | int i; | |
1737 | STACK_OF(SRTP_PROTECTION_PROFILE) *clnt; | |
1738 | SRTP_PROTECTION_PROFILE *prof; | |
1739 | ||
1266eefd MC |
1740 | if (!PACKET_get_net_2(pkt, &ct) || ct != 2 |
1741 | || !PACKET_get_net_2(pkt, &id) | |
1742 | || !PACKET_get_1(pkt, &mki) | |
1743 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1744 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1745 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
6dd083fd MC |
1746 | return 0; |
1747 | } | |
1748 | ||
1749 | if (mki != 0) { | |
1750 | /* Must be no MKI, since we never offer one */ | |
f63a17d6 MC |
1751 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1752 | SSL_R_BAD_SRTP_MKI_VALUE); | |
6dd083fd MC |
1753 | return 0; |
1754 | } | |
1755 | ||
6dd083fd | 1756 | /* Throw an error if the server gave us an unsolicited extension */ |
1266eefd | 1757 | clnt = SSL_get_srtp_profiles(s); |
6dd083fd | 1758 | if (clnt == NULL) { |
f63a17d6 MC |
1759 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1760 | SSL_R_NO_SRTP_PROFILES); | |
6dd083fd MC |
1761 | return 0; |
1762 | } | |
1763 | ||
1764 | /* | |
1765 | * Check to see if the server gave us something we support (and | |
1766 | * presumably offered) | |
1767 | */ | |
1768 | for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) { | |
1769 | prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i); | |
1770 | ||
1771 | if (prof->id == id) { | |
1772 | s->srtp_profile = prof; | |
6dd083fd MC |
1773 | return 1; |
1774 | } | |
1775 | } | |
1776 | ||
f63a17d6 MC |
1777 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP, |
1778 | SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST); | |
6dd083fd MC |
1779 | return 0; |
1780 | } | |
1781 | #endif | |
1782 | ||
61138358 | 1783 | int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1784 | size_t chainidx) |
6dd083fd MC |
1785 | { |
1786 | /* Ignore if inappropriate ciphersuite */ | |
1787 | if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC) | |
555cbb32 TS |
1788 | && s->s3.tmp.new_cipher->algorithm_mac != SSL_AEAD |
1789 | && s->s3.tmp.new_cipher->algorithm_enc != SSL_RC4) | |
28a31a0a | 1790 | s->ext.use_etm = 1; |
6dd083fd MC |
1791 | |
1792 | return 1; | |
1793 | } | |
1794 | ||
61138358 | 1795 | int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1796 | size_t chainidx) |
6dd083fd | 1797 | { |
088dfa13 TS |
1798 | if (s->options & SSL_OP_NO_EXTENDED_MASTER_SECRET) |
1799 | return 1; | |
555cbb32 | 1800 | s->s3.flags |= TLS1_FLAGS_RECEIVED_EXTMS; |
6dd083fd MC |
1801 | if (!s->hit) |
1802 | s->session->flags |= SSL_SESS_FLAG_EXTMS; | |
1803 | ||
1804 | return 1; | |
1805 | } | |
1806 | ||
88050dd1 MC |
1807 | int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context, |
1808 | X509 *x, size_t chainidx) | |
1809 | { | |
1810 | unsigned int version; | |
1811 | ||
1812 | if (!PACKET_get_net_2(pkt, &version) | |
1813 | || PACKET_remaining(pkt) != 0) { | |
1814 | SSLfatal(s, SSL_AD_DECODE_ERROR, | |
1815 | SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS, | |
1816 | SSL_R_LENGTH_MISMATCH); | |
1817 | return 0; | |
1818 | } | |
1819 | ||
27e462f1 MC |
1820 | /* |
1821 | * The only protocol version we support which is valid in this extension in | |
1822 | * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else. | |
1823 | */ | |
1824 | if (version != TLS1_3_VERSION) { | |
1825 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, | |
1826 | SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS, | |
1827 | SSL_R_BAD_PROTOCOL_VERSION_NUMBER); | |
1828 | return 0; | |
1829 | } | |
1830 | ||
426dfc9f | 1831 | /* We ignore this extension for HRRs except to sanity check it */ |
27e462f1 | 1832 | if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) |
426dfc9f | 1833 | return 1; |
426dfc9f | 1834 | |
88050dd1 MC |
1835 | /* We just set it here. We validate it in ssl_choose_client_version */ |
1836 | s->version = version; | |
1837 | ||
1838 | return 1; | |
1839 | } | |
1840 | ||
61138358 | 1841 | int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1842 | size_t chainidx) |
6dd083fd | 1843 | { |
3cf96e88 | 1844 | #ifndef OPENSSL_NO_TLS1_3 |
6dd083fd MC |
1845 | unsigned int group_id; |
1846 | PACKET encoded_pt; | |
555cbb32 | 1847 | EVP_PKEY *ckey = s->s3.tmp.pkey, *skey = NULL; |
6dd083fd MC |
1848 | |
1849 | /* Sanity check */ | |
555cbb32 | 1850 | if (ckey == NULL || s->s3.peer_tmp != NULL) { |
f63a17d6 MC |
1851 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1852 | ERR_R_INTERNAL_ERROR); | |
6dd083fd MC |
1853 | return 0; |
1854 | } | |
1855 | ||
1856 | if (!PACKET_get_net_2(pkt, &group_id)) { | |
f63a17d6 MC |
1857 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1858 | SSL_R_LENGTH_MISMATCH); | |
6dd083fd MC |
1859 | return 0; |
1860 | } | |
1861 | ||
fe874d27 | 1862 | if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) { |
f48d826e DSH |
1863 | const uint16_t *pgroups = NULL; |
1864 | size_t i, num_groups; | |
3847d426 MC |
1865 | |
1866 | if (PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1867 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1868 | SSL_R_LENGTH_MISMATCH); | |
3847d426 MC |
1869 | return 0; |
1870 | } | |
1871 | ||
1872 | /* | |
1873 | * It is an error if the HelloRetryRequest wants a key_share that we | |
1874 | * already sent in the first ClientHello | |
1875 | */ | |
555cbb32 | 1876 | if (group_id == s->s3.group_id) { |
f63a17d6 MC |
1877 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1878 | SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
3847d426 MC |
1879 | return 0; |
1880 | } | |
1881 | ||
1882 | /* Validate the selected group is one we support */ | |
f48d826e DSH |
1883 | tls1_get_supported_groups(s, &pgroups, &num_groups); |
1884 | for (i = 0; i < num_groups; i++) { | |
1885 | if (group_id == pgroups[i]) | |
3847d426 MC |
1886 | break; |
1887 | } | |
f48d826e | 1888 | if (i >= num_groups |
dbc6268f | 1889 | || !tls_group_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) { |
f63a17d6 MC |
1890 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, |
1891 | SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE); | |
3847d426 MC |
1892 | return 0; |
1893 | } | |
1894 | ||
555cbb32 TS |
1895 | s->s3.group_id = group_id; |
1896 | EVP_PKEY_free(s->s3.tmp.pkey); | |
1897 | s->s3.tmp.pkey = NULL; | |
3847d426 MC |
1898 | return 1; |
1899 | } | |
1900 | ||
555cbb32 | 1901 | if (group_id != s->s3.group_id) { |
6dd083fd MC |
1902 | /* |
1903 | * This isn't for the group that we sent in the original | |
1904 | * key_share! | |
1905 | */ | |
f63a17d6 MC |
1906 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1907 | SSL_R_BAD_KEY_SHARE); | |
6dd083fd MC |
1908 | return 0; |
1909 | } | |
1910 | ||
1911 | if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt) | |
1912 | || PACKET_remaining(&encoded_pt) == 0) { | |
f63a17d6 MC |
1913 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1914 | SSL_R_LENGTH_MISMATCH); | |
6dd083fd MC |
1915 | return 0; |
1916 | } | |
1917 | ||
166c0b98 DB |
1918 | skey = EVP_PKEY_new(); |
1919 | if (skey == NULL || EVP_PKEY_copy_parameters(skey, ckey) <= 0) { | |
f63a17d6 MC |
1920 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1921 | ERR_R_MALLOC_FAILURE); | |
6dd083fd MC |
1922 | return 0; |
1923 | } | |
afce590b RL |
1924 | |
1925 | /* | |
1926 | * TODO(3.0) Remove this when EVP_PKEY_get1_tls_encodedpoint() | |
1927 | * knows how to get a key from an encoded point with the help of | |
1928 | * a OSSL_SERIALIZER deserializer. We know that EVP_PKEY_get0() | |
1929 | * downgrades an EVP_PKEY to contain a legacy key. | |
1930 | * | |
1931 | * THIS IS TEMPORARY | |
1932 | */ | |
1933 | EVP_PKEY_get0(skey); | |
1934 | if (EVP_PKEY_id(skey) == EVP_PKEY_NONE) { | |
1935 | EVP_PKEY_free(skey); | |
1936 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE, | |
1937 | ERR_R_INTERNAL_ERROR); | |
1938 | return 0; | |
1939 | } | |
1940 | ||
6dd083fd MC |
1941 | if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt), |
1942 | PACKET_remaining(&encoded_pt))) { | |
f63a17d6 MC |
1943 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE, |
1944 | SSL_R_BAD_ECPOINT); | |
a1d6a0b6 | 1945 | EVP_PKEY_free(skey); |
6dd083fd MC |
1946 | return 0; |
1947 | } | |
1948 | ||
1949 | if (ssl_derive(s, ckey, skey, 1) == 0) { | |
f63a17d6 | 1950 | /* SSLfatal() already called */ |
6dd083fd MC |
1951 | EVP_PKEY_free(skey); |
1952 | return 0; | |
1953 | } | |
555cbb32 | 1954 | s->s3.peer_tmp = skey; |
3cf96e88 | 1955 | #endif |
6dd083fd MC |
1956 | |
1957 | return 1; | |
1958 | } | |
4ff65f77 | 1959 | |
cfef5027 | 1960 | int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 1961 | size_t chainidx) |
cfef5027 MC |
1962 | { |
1963 | PACKET cookie; | |
1964 | ||
1965 | if (!PACKET_as_length_prefixed_2(pkt, &cookie) | |
1966 | || !PACKET_memdup(&cookie, &s->ext.tls13_cookie, | |
1967 | &s->ext.tls13_cookie_len)) { | |
f63a17d6 MC |
1968 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_COOKIE, |
1969 | SSL_R_LENGTH_MISMATCH); | |
cfef5027 MC |
1970 | return 0; |
1971 | } | |
1972 | ||
1973 | return 1; | |
1974 | } | |
1975 | ||
38df5a45 | 1976 | int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context, |
f63a17d6 | 1977 | X509 *x, size_t chainidx) |
38df5a45 | 1978 | { |
fe874d27 | 1979 | if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) { |
6594189f MC |
1980 | unsigned long max_early_data; |
1981 | ||
1982 | if (!PACKET_get_net_4(pkt, &max_early_data) | |
1983 | || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
1984 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1985 | SSL_R_INVALID_MAX_EARLY_DATA); | |
6594189f MC |
1986 | return 0; |
1987 | } | |
1988 | ||
1989 | s->session->ext.max_early_data = max_early_data; | |
1990 | ||
1991 | return 1; | |
1992 | } | |
1993 | ||
38df5a45 | 1994 | if (PACKET_remaining(pkt) != 0) { |
f63a17d6 MC |
1995 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
1996 | SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
1997 | return 0; |
1998 | } | |
1999 | ||
4be3a7c7 | 2000 | if (!s->ext.early_data_ok |
c96ce52c | 2001 | || !s->hit) { |
38df5a45 MC |
2002 | /* |
2003 | * If we get here then we didn't send early data, or we didn't resume | |
4be3a7c7 MC |
2004 | * using the first identity, or the SNI/ALPN is not consistent so the |
2005 | * server should not be accepting it. | |
38df5a45 | 2006 | */ |
f63a17d6 MC |
2007 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_EARLY_DATA, |
2008 | SSL_R_BAD_EXTENSION); | |
38df5a45 MC |
2009 | return 0; |
2010 | } | |
2011 | ||
2012 | s->ext.early_data = SSL_EARLY_DATA_ACCEPTED; | |
2013 | ||
2014 | return 1; | |
2015 | } | |
2016 | ||
61138358 | 2017 | int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x, |
f63a17d6 | 2018 | size_t chainidx) |
4ff65f77 MC |
2019 | { |
2020 | #ifndef OPENSSL_NO_TLS1_3 | |
2021 | unsigned int identity; | |
2022 | ||
2023 | if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) { | |
f63a17d6 MC |
2024 | SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_PSK, |
2025 | SSL_R_LENGTH_MISMATCH); | |
4ff65f77 MC |
2026 | return 0; |
2027 | } | |
2028 | ||
c96ce52c MC |
2029 | if (identity >= (unsigned int)s->ext.tick_identity) { |
2030 | SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_PSK, | |
2031 | SSL_R_BAD_PSK_IDENTITY); | |
2032 | return 0; | |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | * Session resumption tickets are always sent before PSK tickets. If the | |
2037 | * ticket index is 0 then it must be for a session resumption ticket if we | |
2038 | * sent two tickets, or if we didn't send a PSK ticket. | |
2039 | */ | |
2040 | if (identity == 0 && (s->psksession == NULL || s->ext.tick_identity == 2)) { | |
9368f865 MC |
2041 | s->hit = 1; |
2042 | SSL_SESSION_free(s->psksession); | |
2043 | s->psksession = NULL; | |
2044 | return 1; | |
2045 | } | |
2046 | ||
c96ce52c MC |
2047 | if (s->psksession == NULL) { |
2048 | /* Should never happen */ | |
2049 | SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_PSK, | |
2050 | ERR_R_INTERNAL_ERROR); | |
4ff65f77 MC |
2051 | return 0; |
2052 | } | |
2053 | ||
add8d0e9 MC |
2054 | /* |
2055 | * If we used the external PSK for sending early_data then s->early_secret | |
2056 | * is already set up, so don't overwrite it. Otherwise we copy the | |
2057 | * early_secret across that we generated earlier. | |
2058 | */ | |
2059 | if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY | |
2060 | && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING) | |
2061 | || s->session->ext.max_early_data > 0 | |
2062 | || s->psksession->ext.max_early_data == 0) | |
2063 | memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE); | |
2064 | ||
9368f865 MC |
2065 | SSL_SESSION_free(s->session); |
2066 | s->session = s->psksession; | |
2067 | s->psksession = NULL; | |
4ff65f77 | 2068 | s->hit = 1; |
c96ce52c MC |
2069 | /* Early data is only allowed if we used the first ticket */ |
2070 | if (identity != 0) | |
2071 | s->ext.early_data_ok = 0; | |
4ff65f77 MC |
2072 | #endif |
2073 | ||
2074 | return 1; | |
2075 | } |