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| 1 /* ssl/d1_enc.c */ | |
| 2 /* | |
| 3 * DTLS implementation written by Nagendra Modadugu | |
| 4 * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. | |
| 5 */ | |
| 6 /* ==================================================================== | |
| 7 * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. | |
| 8 * | |
| 9 * Redistribution and use in source and binary forms, with or without | |
| 10 * modification, are permitted provided that the following conditions | |
| 11 * are met: | |
| 12 * | |
| 13 * 1. Redistributions of source code must retain the above copyright | |
| 14 * notice, this list of conditions and the following disclaimer. | |
| 15 * | |
| 16 * 2. Redistributions in binary form must reproduce the above copyright | |
| 17 * notice, this list of conditions and the following disclaimer in | |
| 18 * the documentation and/or other materials provided with the | |
| 19 * distribution. | |
| 20 * | |
| 21 * 3. All advertising materials mentioning features or use of this | |
| 22 * software must display the following acknowledgment: | |
| 23 * "This product includes software developed by the OpenSSL Project | |
| 24 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
| 25 * | |
| 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 27 * endorse or promote products derived from this software without | |
| 28 * prior written permission. For written permission, please contact | |
| 29 * openssl-core@openssl.org. | |
| 30 * | |
| 31 * 5. Products derived from this software may not be called "OpenSSL" | |
| 32 * nor may "OpenSSL" appear in their names without prior written | |
| 33 * permission of the OpenSSL Project. | |
| 34 * | |
| 35 * 6. Redistributions of any form whatsoever must retain the following | |
| 36 * acknowledgment: | |
| 37 * "This product includes software developed by the OpenSSL Project | |
| 38 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
| 39 * | |
| 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 51 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 52 * ==================================================================== | |
| 53 * | |
| 54 * This product includes cryptographic software written by Eric Young | |
| 55 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 56 * Hudson (tjh@cryptsoft.com). | |
| 57 * | |
| 58 */ | |
| 59 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 60 * All rights reserved. | |
| 61 * | |
| 62 * This package is an SSL implementation written | |
| 63 * by Eric Young (eay@cryptsoft.com). | |
| 64 * The implementation was written so as to conform with Netscapes SSL. | |
| 65 * | |
| 66 * This library is free for commercial and non-commercial use as long as | |
| 67 * the following conditions are aheared to. The following conditions | |
| 68 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 69 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 70 * included with this distribution is covered by the same copyright terms | |
| 71 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 72 * | |
| 73 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 74 * the code are not to be removed. | |
| 75 * If this package is used in a product, Eric Young should be given attribution | |
| 76 * as the author of the parts of the library used. | |
| 77 * This can be in the form of a textual message at program startup or | |
| 78 * in documentation (online or textual) provided with the package. | |
| 79 * | |
| 80 * Redistribution and use in source and binary forms, with or without | |
| 81 * modification, are permitted provided that the following conditions | |
| 82 * are met: | |
| 83 * 1. Redistributions of source code must retain the copyright | |
| 84 * notice, this list of conditions and the following disclaimer. | |
| 85 * 2. Redistributions in binary form must reproduce the above copyright | |
| 86 * notice, this list of conditions and the following disclaimer in the | |
| 87 * documentation and/or other materials provided with the distribution. | |
| 88 * 3. All advertising materials mentioning features or use of this software | |
| 89 * must display the following acknowledgement: | |
| 90 * "This product includes cryptographic software written by | |
| 91 * Eric Young (eay@cryptsoft.com)" | |
| 92 * The word 'cryptographic' can be left out if the rouines from the library | |
| 93 * being used are not cryptographic related :-). | |
| 94 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 95 * the apps directory (application code) you must include an acknowledgement: | |
| 96 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 97 * | |
| 98 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 99 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 100 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 101 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 102 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 103 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 104 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 108 * SUCH DAMAGE. | |
| 109 * | |
| 110 * The licence and distribution terms for any publically available version or | |
| 111 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 112 * copied and put under another distribution licence | |
| 113 * [including the GNU Public Licence.] | |
| 114 */ | |
| 115 | |
| 116 #include <stdio.h> | |
| 117 #include "ssl_locl.h" | |
| 118 #ifndef OPENSSL_NO_COMP | |
| 119 #include <openssl/comp.h> | |
| 120 #endif | |
| 121 #include <openssl/evp.h> | |
| 122 #include <openssl/hmac.h> | |
| 123 #include <openssl/md5.h> | |
| 124 #include <openssl/rand.h> | |
| 125 #ifdef KSSL_DEBUG | |
| 126 #include <openssl/des.h> | |
| 127 #endif | |
| 128 | |
| 129 /* dtls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively
. | |
| 130 * | |
| 131 * Returns: | |
| 132 * 0: (in non-constant time) if the record is publically invalid (i.e. too | |
| 133 * short etc). | |
| 134 * 1: if the record's padding is valid / the encryption was successful. | |
| 135 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending, | |
| 136 * an internal error occured. */ | |
| 137 int dtls1_enc(SSL *s, int send) | |
| 138 { | |
| 139 SSL3_RECORD *rec; | |
| 140 EVP_CIPHER_CTX *ds; | |
| 141 unsigned long l; | |
| 142 int bs,i,j,k,mac_size=0; | |
| 143 const EVP_CIPHER *enc; | |
| 144 | |
| 145 if (send) | |
| 146 { | |
| 147 if (EVP_MD_CTX_md(s->write_hash)) | |
| 148 { | |
| 149 mac_size=EVP_MD_CTX_size(s->write_hash); | |
| 150 if (mac_size < 0) | |
| 151 return -1; | |
| 152 } | |
| 153 ds=s->enc_write_ctx; | |
| 154 rec= &(s->s3->wrec); | |
| 155 if (s->enc_write_ctx == NULL) | |
| 156 enc=NULL; | |
| 157 else | |
| 158 { | |
| 159 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx); | |
| 160 if ( rec->data != rec->input) | |
| 161 /* we can't write into the input stream */ | |
| 162 fprintf(stderr, "%s:%d: rec->data != rec->input\
n", | |
| 163 __FILE__, __LINE__); | |
| 164 else if ( EVP_CIPHER_block_size(ds->cipher) > 1) | |
| 165 { | |
| 166 if (RAND_bytes(rec->input, EVP_CIPHER_block_size
(ds->cipher)) <= 0) | |
| 167 return -1; | |
| 168 } | |
| 169 } | |
| 170 } | |
| 171 else | |
| 172 { | |
| 173 if (EVP_MD_CTX_md(s->read_hash)) | |
| 174 { | |
| 175 mac_size=EVP_MD_CTX_size(s->read_hash); | |
| 176 OPENSSL_assert(mac_size >= 0); | |
| 177 } | |
| 178 ds=s->enc_read_ctx; | |
| 179 rec= &(s->s3->rrec); | |
| 180 if (s->enc_read_ctx == NULL) | |
| 181 enc=NULL; | |
| 182 else | |
| 183 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx); | |
| 184 } | |
| 185 | |
| 186 #ifdef KSSL_DEBUG | |
| 187 printf("dtls1_enc(%d)\n", send); | |
| 188 #endif /* KSSL_DEBUG */ | |
| 189 | |
| 190 if ((s->session == NULL) || (ds == NULL) || | |
| 191 (enc == NULL)) | |
| 192 { | |
| 193 memmove(rec->data,rec->input,rec->length); | |
| 194 rec->input=rec->data; | |
| 195 } | |
| 196 else | |
| 197 { | |
| 198 l=rec->length; | |
| 199 bs=EVP_CIPHER_block_size(ds->cipher); | |
| 200 | |
| 201 if ((bs != 1) && send) | |
| 202 { | |
| 203 i=bs-((int)l%bs); | |
| 204 | |
| 205 /* Add weird padding of upto 256 bytes */ | |
| 206 | |
| 207 /* we need to add 'i' padding bytes of value j */ | |
| 208 j=i-1; | |
| 209 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG) | |
| 210 { | |
| 211 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG) | |
| 212 j++; | |
| 213 } | |
| 214 for (k=(int)l; k<(int)(l+i); k++) | |
| 215 rec->input[k]=j; | |
| 216 l+=i; | |
| 217 rec->length+=i; | |
| 218 } | |
| 219 | |
| 220 #ifdef KSSL_DEBUG | |
| 221 { | |
| 222 unsigned long ui; | |
| 223 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n
", | |
| 224 ds,rec->data,rec->input,l); | |
| 225 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_
len\n", | |
| 226 ds->buf_len, ds->cipher->key_len, | |
| 227 DES_KEY_SZ, DES_SCHEDULE_SZ, | |
| 228 ds->cipher->iv_len); | |
| 229 printf("\t\tIV: "); | |
| 230 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]); | |
| 231 printf("\n"); | |
| 232 printf("\trec->input="); | |
| 233 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]); | |
| 234 printf("\n"); | |
| 235 } | |
| 236 #endif /* KSSL_DEBUG */ | |
| 237 | |
| 238 if (!send) | |
| 239 { | |
| 240 if (l == 0 || l%bs != 0) | |
| 241 return 0; | |
| 242 } | |
| 243 | |
| 244 EVP_Cipher(ds,rec->data,rec->input,l); | |
| 245 | |
| 246 #ifdef KSSL_DEBUG | |
| 247 { | |
| 248 unsigned long i; | |
| 249 printf("\trec->data="); | |
| 250 for (i=0; i<l; i++) | |
| 251 printf(" %02x", rec->data[i]); printf("\n"); | |
| 252 } | |
| 253 #endif /* KSSL_DEBUG */ | |
| 254 | |
| 255 if ((bs != 1) && !send) | |
| 256 return tls1_cbc_remove_padding(s, rec, bs, mac_size); | |
| 257 } | |
| 258 return(1); | |
| 259 } | |
| 260 | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master