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| 1 /* crypto/evp/e_rc2.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 <stdio.h> | |
| 60 #include "cryptlib.h" | |
| 61 | |
| 62 #ifndef OPENSSL_NO_RC2 | |
| 63 | |
| 64 #include <openssl/evp.h> | |
| 65 #include <openssl/objects.h> | |
| 66 #include "evp_locl.h" | |
| 67 #include <openssl/rc2.h> | |
| 68 | |
| 69 static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
| 70 const unsigned char *iv,int enc); | |
| 71 static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx); | |
| 72 static int rc2_magic_to_meth(int i); | |
| 73 static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); | |
| 74 static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); | |
| 75 static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); | |
| 76 | |
| 77 typedef struct | |
| 78 { | |
| 79 int key_bits; /* effective key bits */ | |
| 80 RC2_KEY ks; /* key schedule */ | |
| 81 } EVP_RC2_KEY; | |
| 82 | |
| 83 #define data(ctx) ((EVP_RC2_KEY *)(ctx)->cipher_data) | |
| 84 | |
| 85 IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2, | |
| 86 8, | |
| 87 RC2_KEY_LENGTH, 8, 64, | |
| 88 EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
| 89 rc2_init_key, NULL, | |
| 90 rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, | |
| 91 rc2_ctrl) | |
| 92 | |
| 93 #define RC2_40_MAGIC 0xa0 | |
| 94 #define RC2_64_MAGIC 0x78 | |
| 95 #define RC2_128_MAGIC 0x3a | |
| 96 | |
| 97 static const EVP_CIPHER r2_64_cbc_cipher= | |
| 98 { | |
| 99 NID_rc2_64_cbc, | |
| 100 8,8 /* 64 bit */,8, | |
| 101 EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
| 102 rc2_init_key, | |
| 103 rc2_cbc_cipher, | |
| 104 NULL, | |
| 105 sizeof(EVP_RC2_KEY), | |
| 106 rc2_set_asn1_type_and_iv, | |
| 107 rc2_get_asn1_type_and_iv, | |
| 108 rc2_ctrl, | |
| 109 NULL | |
| 110 }; | |
| 111 | |
| 112 static const EVP_CIPHER r2_40_cbc_cipher= | |
| 113 { | |
| 114 NID_rc2_40_cbc, | |
| 115 8,5 /* 40 bit */,8, | |
| 116 EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, | |
| 117 rc2_init_key, | |
| 118 rc2_cbc_cipher, | |
| 119 NULL, | |
| 120 sizeof(EVP_RC2_KEY), | |
| 121 rc2_set_asn1_type_and_iv, | |
| 122 rc2_get_asn1_type_and_iv, | |
| 123 rc2_ctrl, | |
| 124 NULL | |
| 125 }; | |
| 126 | |
| 127 const EVP_CIPHER *EVP_rc2_64_cbc(void) | |
| 128 { | |
| 129 return(&r2_64_cbc_cipher); | |
| 130 } | |
| 131 | |
| 132 const EVP_CIPHER *EVP_rc2_40_cbc(void) | |
| 133 { | |
| 134 return(&r2_40_cbc_cipher); | |
| 135 } | |
| 136 | |
| 137 static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, | |
| 138 const unsigned char *iv, int enc) | |
| 139 { | |
| 140 RC2_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx), | |
| 141 key,data(ctx)->key_bits); | |
| 142 return 1; | |
| 143 } | |
| 144 | |
| 145 static int rc2_meth_to_magic(EVP_CIPHER_CTX *e) | |
| 146 { | |
| 147 int i; | |
| 148 | |
| 149 EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i); | |
| 150 if (i == 128) return(RC2_128_MAGIC); | |
| 151 else if (i == 64) return(RC2_64_MAGIC); | |
| 152 else if (i == 40) return(RC2_40_MAGIC); | |
| 153 else return(0); | |
| 154 } | |
| 155 | |
| 156 static int rc2_magic_to_meth(int i) | |
| 157 { | |
| 158 if (i == RC2_128_MAGIC) return 128; | |
| 159 else if (i == RC2_64_MAGIC) return 64; | |
| 160 else if (i == RC2_40_MAGIC) return 40; | |
| 161 else | |
| 162 { | |
| 163 EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE); | |
| 164 return(0); | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) | |
| 169 { | |
| 170 long num=0; | |
| 171 int i=0; | |
| 172 int key_bits; | |
| 173 unsigned int l; | |
| 174 unsigned char iv[EVP_MAX_IV_LENGTH]; | |
| 175 | |
| 176 if (type != NULL) | |
| 177 { | |
| 178 l=EVP_CIPHER_CTX_iv_length(c); | |
| 179 OPENSSL_assert(l <= sizeof(iv)); | |
| 180 i=ASN1_TYPE_get_int_octetstring(type,&num,iv,l); | |
| 181 if (i != (int)l) | |
| 182 return(-1); | |
| 183 key_bits =rc2_magic_to_meth((int)num); | |
| 184 if (!key_bits) | |
| 185 return(-1); | |
| 186 if(i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1)) | |
| 187 return -1; | |
| 188 EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL
); | |
| 189 EVP_CIPHER_CTX_set_key_length(c, key_bits / 8); | |
| 190 } | |
| 191 return(i); | |
| 192 } | |
| 193 | |
| 194 static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) | |
| 195 { | |
| 196 long num; | |
| 197 int i=0,j; | |
| 198 | |
| 199 if (type != NULL) | |
| 200 { | |
| 201 num=rc2_meth_to_magic(c); | |
| 202 j=EVP_CIPHER_CTX_iv_length(c); | |
| 203 i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j); | |
| 204 } | |
| 205 return(i); | |
| 206 } | |
| 207 | |
| 208 static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) | |
| 209 { | |
| 210 switch(type) | |
| 211 { | |
| 212 case EVP_CTRL_INIT: | |
| 213 data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8; | |
| 214 return 1; | |
| 215 | |
| 216 case EVP_CTRL_GET_RC2_KEY_BITS: | |
| 217 *(int *)ptr = data(c)->key_bits; | |
| 218 return 1; | |
| 219 | |
| 220 case EVP_CTRL_SET_RC2_KEY_BITS: | |
| 221 if(arg > 0) | |
| 222 { | |
| 223 data(c)->key_bits = arg; | |
| 224 return 1; | |
| 225 } | |
| 226 return 0; | |
| 227 #ifdef PBE_PRF_TEST | |
| 228 case EVP_CTRL_PBE_PRF_NID: | |
| 229 *(int *)ptr = NID_hmacWithMD5; | |
| 230 return 1; | |
| 231 #endif | |
| 232 | |
| 233 default: | |
| 234 return -1; | |
| 235 } | |
| 236 } | |
| 237 | |
| 238 #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