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| 1 /* ssl/s2_enc.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 #include "ssl_locl.h" | |
| 60 #ifndef OPENSSL_NO_SSL2 | |
| 61 #include <stdio.h> | |
| 62 | |
| 63 int ssl2_enc_init(SSL *s, int client) | |
| 64 { | |
| 65 /* Max number of bytes needed */ | |
| 66 EVP_CIPHER_CTX *rs,*ws; | |
| 67 const EVP_CIPHER *c; | |
| 68 const EVP_MD *md; | |
| 69 int num; | |
| 70 | |
| 71 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL)) | |
| 72 { | |
| 73 ssl2_return_error(s,SSL2_PE_NO_CIPHER); | |
| 74 SSLerr(SSL_F_SSL2_ENC_INIT,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIO
NS); | |
| 75 return(0); | |
| 76 } | |
| 77 ssl_replace_hash(&s->read_hash,md); | |
| 78 ssl_replace_hash(&s->write_hash,md); | |
| 79 | |
| 80 if ((s->enc_read_ctx == NULL) && | |
| 81 ((s->enc_read_ctx=(EVP_CIPHER_CTX *) | |
| 82 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
| 83 goto err; | |
| 84 | |
| 85 /* make sure it's intialized in case the malloc for enc_write_ctx fails | |
| 86 * and we exit with an error */ | |
| 87 rs= s->enc_read_ctx; | |
| 88 EVP_CIPHER_CTX_init(rs); | |
| 89 | |
| 90 if ((s->enc_write_ctx == NULL) && | |
| 91 ((s->enc_write_ctx=(EVP_CIPHER_CTX *) | |
| 92 OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)) | |
| 93 goto err; | |
| 94 | |
| 95 ws= s->enc_write_ctx; | |
| 96 EVP_CIPHER_CTX_init(ws); | |
| 97 | |
| 98 num=c->key_len; | |
| 99 s->s2->key_material_length=num*2; | |
| 100 OPENSSL_assert(s->s2->key_material_length <= sizeof s->s2->key_material)
; | |
| 101 | |
| 102 if (ssl2_generate_key_material(s) <= 0) | |
| 103 return 0; | |
| 104 | |
| 105 OPENSSL_assert(c->iv_len <= (int)sizeof(s->session->key_arg)); | |
| 106 EVP_EncryptInit_ex(ws,c,NULL,&(s->s2->key_material[(client)?num:0]), | |
| 107 s->session->key_arg); | |
| 108 EVP_DecryptInit_ex(rs,c,NULL,&(s->s2->key_material[(client)?0:num]), | |
| 109 s->session->key_arg); | |
| 110 s->s2->read_key= &(s->s2->key_material[(client)?0:num]); | |
| 111 s->s2->write_key= &(s->s2->key_material[(client)?num:0]); | |
| 112 return(1); | |
| 113 err: | |
| 114 SSLerr(SSL_F_SSL2_ENC_INIT,ERR_R_MALLOC_FAILURE); | |
| 115 return(0); | |
| 116 } | |
| 117 | |
| 118 /* read/writes from s->s2->mac_data using length for encrypt and | |
| 119 * decrypt. It sets s->s2->padding and s->[rw]length | |
| 120 * if we are encrypting */ | |
| 121 void ssl2_enc(SSL *s, int send) | |
| 122 { | |
| 123 EVP_CIPHER_CTX *ds; | |
| 124 unsigned long l; | |
| 125 int bs; | |
| 126 | |
| 127 if (send) | |
| 128 { | |
| 129 ds=s->enc_write_ctx; | |
| 130 l=s->s2->wlength; | |
| 131 } | |
| 132 else | |
| 133 { | |
| 134 ds=s->enc_read_ctx; | |
| 135 l=s->s2->rlength; | |
| 136 } | |
| 137 | |
| 138 /* check for NULL cipher */ | |
| 139 if (ds == NULL) return; | |
| 140 | |
| 141 | |
| 142 bs=ds->cipher->block_size; | |
| 143 /* This should be using (bs-1) and bs instead of 7 and 8, but | |
| 144 * what the hell. */ | |
| 145 if (bs == 8) | |
| 146 l=(l+7)/8*8; | |
| 147 | |
| 148 EVP_Cipher(ds,s->s2->mac_data,s->s2->mac_data,l); | |
| 149 } | |
| 150 | |
| 151 void ssl2_mac(SSL *s, unsigned char *md, int send) | |
| 152 { | |
| 153 EVP_MD_CTX c; | |
| 154 unsigned char sequence[4],*p,*sec,*act; | |
| 155 unsigned long seq; | |
| 156 unsigned int len; | |
| 157 | |
| 158 if (send) | |
| 159 { | |
| 160 seq=s->s2->write_sequence; | |
| 161 sec=s->s2->write_key; | |
| 162 len=s->s2->wact_data_length; | |
| 163 act=s->s2->wact_data; | |
| 164 } | |
| 165 else | |
| 166 { | |
| 167 seq=s->s2->read_sequence; | |
| 168 sec=s->s2->read_key; | |
| 169 len=s->s2->ract_data_length; | |
| 170 act=s->s2->ract_data; | |
| 171 } | |
| 172 | |
| 173 p= &(sequence[0]); | |
| 174 l2n(seq,p); | |
| 175 | |
| 176 /* There has to be a MAC algorithm. */ | |
| 177 EVP_MD_CTX_init(&c); | |
| 178 EVP_MD_CTX_copy(&c, s->read_hash); | |
| 179 EVP_DigestUpdate(&c,sec, | |
| 180 EVP_CIPHER_CTX_key_length(s->enc_read_ctx)); | |
| 181 EVP_DigestUpdate(&c,act,len); | |
| 182 /* the above line also does the pad data */ | |
| 183 EVP_DigestUpdate(&c,sequence,4); | |
| 184 EVP_DigestFinal_ex(&c,md,NULL); | |
| 185 EVP_MD_CTX_cleanup(&c); | |
| 186 } | |
| 187 #else /* !OPENSSL_NO_SSL2 */ | |
| 188 | |
| 189 # if PEDANTIC | |
| 190 static void *dummy=&dummy; | |
| 191 # endif | |
| 192 | |
| 193 #endif | |
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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