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1 | /* |
2 | * DTLS implementation written by Nagendra Modadugu | |
3 | * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. | |
4 | */ | |
5 | /* ==================================================================== | |
6 | * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * openssl-core@openssl.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
57 | */ | |
58 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
59 | * All rights reserved. | |
60 | * | |
61 | * This package is an SSL implementation written | |
62 | * by Eric Young (eay@cryptsoft.com). | |
63 | * The implementation was written so as to conform with Netscapes SSL. | |
64 | * | |
65 | * This library is free for commercial and non-commercial use as long as | |
66 | * the following conditions are aheared to. The following conditions | |
67 | * apply to all code found in this distribution, be it the RC4, RSA, | |
68 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
69 | * included with this distribution is covered by the same copyright terms | |
70 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
71 | * | |
72 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
73 | * the code are not to be removed. | |
74 | * If this package is used in a product, Eric Young should be given attribution | |
75 | * as the author of the parts of the library used. | |
76 | * This can be in the form of a textual message at program startup or | |
77 | * in documentation (online or textual) provided with the package. | |
78 | * | |
79 | * Redistribution and use in source and binary forms, with or without | |
80 | * modification, are permitted provided that the following conditions | |
81 | * are met: | |
82 | * 1. Redistributions of source code must retain the copyright | |
83 | * notice, this list of conditions and the following disclaimer. | |
84 | * 2. Redistributions in binary form must reproduce the above copyright | |
85 | * notice, this list of conditions and the following disclaimer in the | |
86 | * documentation and/or other materials provided with the distribution. | |
87 | * 3. All advertising materials mentioning features or use of this software | |
88 | * must display the following acknowledgement: | |
89 | * "This product includes cryptographic software written by | |
90 | * Eric Young (eay@cryptsoft.com)" | |
91 | * The word 'cryptographic' can be left out if the rouines from the library | |
92 | * being used are not cryptographic related :-). | |
93 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
94 | * the apps directory (application code) you must include an acknowledgement: | |
95 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
96 | * | |
97 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
98 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
99 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
100 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
101 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
102 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
103 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
104 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
105 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
106 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
107 | * SUCH DAMAGE. | |
108 | * | |
109 | * The licence and distribution terms for any publically available version or | |
110 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
111 | * copied and put under another distribution licence | |
112 | * [including the GNU Public Licence.] | |
113 | */ | |
114 | ||
115 | #define USE_SOCKETS | |
116 | #include "ssl_locl.h" | |
117 | ||
118 | int dtls1_write_app_data_bytes(SSL *s, int type, const void *buf_, int len) | |
119 | { | |
120 | int i; | |
121 | ||
122 | #ifndef OPENSSL_NO_SCTP | |
123 | /* | |
124 | * Check if we have to continue an interrupted handshake for reading | |
125 | * belated app data with SCTP. | |
126 | */ | |
024f543c | 127 | if ((SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) || |
c103c7e2 | 128 | (BIO_dgram_is_sctp(SSL_get_wbio(s)) && |
fe3a3291 | 129 | ossl_statem_in_sctp_read_sock(s))) |
c103c7e2 | 130 | #else |
024f543c | 131 | if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) |
c103c7e2 MC |
132 | #endif |
133 | { | |
134 | i = s->handshake_func(s); | |
135 | if (i < 0) | |
136 | return (i); | |
137 | if (i == 0) { | |
138 | SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES, | |
139 | SSL_R_SSL_HANDSHAKE_FAILURE); | |
140 | return -1; | |
141 | } | |
142 | } | |
143 | ||
144 | if (len > SSL3_RT_MAX_PLAIN_LENGTH) { | |
145 | SSLerr(SSL_F_DTLS1_WRITE_APP_DATA_BYTES, SSL_R_DTLS_MESSAGE_TOO_BIG); | |
146 | return -1; | |
147 | } | |
148 | ||
149 | i = dtls1_write_bytes(s, type, buf_, len); | |
150 | return i; | |
151 | } | |
152 | ||
153 | int dtls1_dispatch_alert(SSL *s) | |
154 | { | |
155 | int i, j; | |
156 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
157 | unsigned char buf[DTLS1_AL_HEADER_LENGTH]; | |
158 | unsigned char *ptr = &buf[0]; | |
159 | ||
160 | s->s3->alert_dispatch = 0; | |
161 | ||
16f8d4eb | 162 | memset(buf, 0, sizeof(buf)); |
c103c7e2 MC |
163 | *ptr++ = s->s3->send_alert[0]; |
164 | *ptr++ = s->s3->send_alert[1]; | |
165 | ||
166 | #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE | |
167 | if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE) { | |
168 | s2n(s->d1->handshake_read_seq, ptr); | |
169 | l2n3(s->d1->r_msg_hdr.frag_off, ptr); | |
170 | } | |
171 | #endif | |
172 | ||
173 | i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0); | |
174 | if (i <= 0) { | |
175 | s->s3->alert_dispatch = 1; | |
176 | /* fprintf( stderr, "not done with alert\n" ); */ | |
177 | } else { | |
178 | if (s->s3->send_alert[0] == SSL3_AL_FATAL | |
179 | #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE | |
180 | || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE | |
181 | #endif | |
182 | ) | |
183 | (void)BIO_flush(s->wbio); | |
184 | ||
185 | if (s->msg_callback) | |
186 | s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, | |
187 | 2, s, s->msg_callback_arg); | |
188 | ||
189 | if (s->info_callback != NULL) | |
190 | cb = s->info_callback; | |
191 | else if (s->ctx->info_callback != NULL) | |
192 | cb = s->ctx->info_callback; | |
193 | ||
194 | if (cb != NULL) { | |
195 | j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1]; | |
196 | cb(s, SSL_CB_WRITE_ALERT, j); | |
197 | } | |
198 | } | |
199 | return (i); | |
200 | } |