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1 | /* ssl/s3_msg.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | /* ==================================================================== | |
59 | * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved. | |
60 | * | |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
111 | ||
112 | #define USE_SOCKETS | |
113 | #include "ssl_locl.h" | |
114 | ||
115 | int ssl3_do_change_cipher_spec(SSL *s) | |
116 | { | |
117 | int i; | |
118 | const char *sender; | |
119 | int slen; | |
120 | ||
121 | if (s->state & SSL_ST_ACCEPT) | |
122 | i = SSL3_CHANGE_CIPHER_SERVER_READ; | |
123 | else | |
124 | i = SSL3_CHANGE_CIPHER_CLIENT_READ; | |
125 | ||
126 | if (s->s3->tmp.key_block == NULL) { | |
127 | if (s->session == NULL || s->session->master_key_length == 0) { | |
128 | /* might happen if dtls1_read_bytes() calls this */ | |
129 | SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, | |
130 | SSL_R_CCS_RECEIVED_EARLY); | |
131 | return (0); | |
132 | } | |
133 | ||
134 | s->session->cipher = s->s3->tmp.new_cipher; | |
135 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
136 | return (0); | |
137 | } | |
138 | ||
139 | if (!s->method->ssl3_enc->change_cipher_state(s, i)) | |
140 | return (0); | |
141 | ||
142 | /* | |
143 | * we have to record the message digest at this point so we can get it | |
144 | * before we read the finished message | |
145 | */ | |
146 | if (s->state & SSL_ST_CONNECT) { | |
147 | sender = s->method->ssl3_enc->server_finished_label; | |
148 | slen = s->method->ssl3_enc->server_finished_label_len; | |
149 | } else { | |
150 | sender = s->method->ssl3_enc->client_finished_label; | |
151 | slen = s->method->ssl3_enc->client_finished_label_len; | |
152 | } | |
153 | ||
154 | i = s->method->ssl3_enc->final_finish_mac(s, | |
155 | sender, slen, | |
156 | s->s3->tmp.peer_finish_md); | |
157 | if (i == 0) { | |
158 | SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR); | |
159 | return 0; | |
160 | } | |
161 | s->s3->tmp.peer_finish_md_len = i; | |
162 | ||
163 | return (1); | |
164 | } | |
165 | ||
166 | int ssl3_send_alert(SSL *s, int level, int desc) | |
167 | { | |
168 | /* Map tls/ssl alert value to correct one */ | |
169 | desc = s->method->ssl3_enc->alert_value(desc); | |
170 | if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION) | |
171 | desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have | |
172 | * protocol_version alerts */ | |
173 | if (desc < 0) | |
174 | return -1; | |
175 | /* If a fatal one, remove from cache */ | |
176 | if ((level == SSL3_AL_FATAL) && (s->session != NULL)) | |
177 | SSL_CTX_remove_session(s->ctx, s->session); | |
178 | ||
179 | s->s3->alert_dispatch = 1; | |
180 | s->s3->send_alert[0] = level; | |
181 | s->s3->send_alert[1] = desc; | |
f161995e | 182 | if (!RECORD_LAYER_write_pending(&s->rlayer)) { |
c103c7e2 MC |
183 | /* data still being written out? */ |
184 | return s->method->ssl_dispatch_alert(s); | |
185 | } | |
186 | /* | |
187 | * else data is still being written out, we will get written some time in | |
188 | * the future | |
189 | */ | |
190 | return -1; | |
191 | } | |
192 | ||
193 | int ssl3_dispatch_alert(SSL *s) | |
194 | { | |
195 | int i, j; | |
196 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
197 | ||
198 | s->s3->alert_dispatch = 0; | |
199 | i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3->send_alert[0], 2, 0); | |
200 | if (i <= 0) { | |
201 | s->s3->alert_dispatch = 1; | |
202 | } else { | |
203 | /* | |
204 | * Alert sent to BIO. If it is important, flush it now. If the | |
205 | * message does not get sent due to non-blocking IO, we will not | |
206 | * worry too much. | |
207 | */ | |
208 | if (s->s3->send_alert[0] == SSL3_AL_FATAL) | |
209 | (void)BIO_flush(s->wbio); | |
210 | ||
211 | if (s->msg_callback) | |
212 | s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, | |
213 | 2, s, s->msg_callback_arg); | |
214 | ||
215 | if (s->info_callback != NULL) | |
216 | cb = s->info_callback; | |
217 | else if (s->ctx->info_callback != NULL) | |
218 | cb = s->ctx->info_callback; | |
219 | ||
220 | if (cb != NULL) { | |
221 | j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1]; | |
222 | cb(s, SSL_CB_WRITE_ALERT, j); | |
223 | } | |
224 | } | |
225 | return (i); | |
226 | } |