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28d59af8 MC |
1 | /* ssl/record/ssl3_buffer.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) 1998-2002 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 | #include "../ssl_locl.h" | |
c99c4c11 | 113 | #include "record_locl.h" |
28d59af8 | 114 | |
bbcd6d7f | 115 | void SSL3_BUFFER_set_data(SSL3_BUFFER *b, const unsigned char *d, int n) |
28d59af8 | 116 | { |
61986d32 | 117 | if (d != NULL) |
28d59af8 MC |
118 | memcpy(b->buf, d, n); |
119 | b->left = n; | |
120 | b->offset = 0; | |
121 | } | |
122 | ||
123 | void SSL3_BUFFER_release(SSL3_BUFFER *b) | |
124 | { | |
b548a1f1 | 125 | OPENSSL_free(b->buf); |
28d59af8 MC |
126 | b->buf = NULL; |
127 | } | |
76042020 MC |
128 | |
129 | int ssl3_setup_read_buffer(SSL *s) | |
130 | { | |
131 | unsigned char *p; | |
132 | size_t len, align = 0, headerlen; | |
133 | SSL3_BUFFER *b; | |
134 | ||
135 | b = RECORD_LAYER_get_rbuf(&s->rlayer); | |
136 | ||
137 | if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) | |
138 | headerlen = DTLS1_RT_HEADER_LENGTH; | |
139 | else | |
140 | headerlen = SSL3_RT_HEADER_LENGTH; | |
141 | ||
142 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 | |
143 | align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); | |
144 | #endif | |
145 | ||
146 | if (b->buf == NULL) { | |
147 | len = SSL3_RT_MAX_PLAIN_LENGTH | |
148 | + SSL3_RT_MAX_ENCRYPTED_OVERHEAD + headerlen + align; | |
149 | if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) { | |
150 | s->s3->init_extra = 1; | |
151 | len += SSL3_RT_MAX_EXTRA; | |
152 | } | |
153 | #ifndef OPENSSL_NO_COMP | |
154 | if (ssl_allow_compression(s)) | |
155 | len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; | |
156 | #endif | |
157 | if ((p = OPENSSL_malloc(len)) == NULL) | |
158 | goto err; | |
159 | b->buf = p; | |
160 | b->len = len; | |
161 | } | |
162 | ||
7a7048af | 163 | RECORD_LAYER_set_packet(&s->rlayer, &(b->buf[0])); |
76042020 MC |
164 | return 1; |
165 | ||
166 | err: | |
167 | SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER, ERR_R_MALLOC_FAILURE); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | int ssl3_setup_write_buffer(SSL *s) | |
172 | { | |
173 | unsigned char *p; | |
174 | size_t len, align = 0, headerlen; | |
175 | SSL3_BUFFER *wb; | |
176 | ||
177 | wb = RECORD_LAYER_get_wbuf(&s->rlayer); | |
178 | ||
179 | if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) | |
180 | headerlen = DTLS1_RT_HEADER_LENGTH + 1; | |
181 | else | |
182 | headerlen = SSL3_RT_HEADER_LENGTH; | |
183 | ||
184 | #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 | |
185 | align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1); | |
186 | #endif | |
187 | ||
188 | if (wb->buf == NULL) { | |
189 | len = s->max_send_fragment | |
190 | + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align; | |
191 | #ifndef OPENSSL_NO_COMP | |
192 | if (ssl_allow_compression(s)) | |
193 | len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; | |
194 | #endif | |
195 | if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) | |
196 | len += headerlen + align + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; | |
197 | ||
198 | if ((p = OPENSSL_malloc(len)) == NULL) | |
199 | goto err; | |
200 | wb->buf = p; | |
201 | wb->len = len; | |
202 | } | |
203 | ||
204 | return 1; | |
205 | ||
206 | err: | |
207 | SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER, ERR_R_MALLOC_FAILURE); | |
208 | return 0; | |
209 | } | |
210 | ||
211 | int ssl3_setup_buffers(SSL *s) | |
212 | { | |
213 | if (!ssl3_setup_read_buffer(s)) | |
214 | return 0; | |
215 | if (!ssl3_setup_write_buffer(s)) | |
216 | return 0; | |
217 | return 1; | |
218 | } | |
219 | ||
220 | int ssl3_release_write_buffer(SSL *s) | |
221 | { | |
222 | SSL3_BUFFER *wb; | |
223 | ||
224 | wb = RECORD_LAYER_get_wbuf(&s->rlayer); | |
225 | ||
b548a1f1 RS |
226 | OPENSSL_free(wb->buf); |
227 | wb->buf = NULL; | |
76042020 MC |
228 | return 1; |
229 | } | |
230 | ||
231 | int ssl3_release_read_buffer(SSL *s) | |
232 | { | |
233 | SSL3_BUFFER *b; | |
234 | ||
235 | b = RECORD_LAYER_get_rbuf(&s->rlayer); | |
b548a1f1 RS |
236 | OPENSSL_free(b->buf); |
237 | b->buf = NULL; | |
76042020 MC |
238 | return 1; |
239 | } |