1*0Sstevel@tonic-gate /* crypto/evp/e_rc2.c */ 2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * This package is an SSL implementation written 6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com). 7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as 10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions 11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA, 12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms 14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15*0Sstevel@tonic-gate * 16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in 17*0Sstevel@tonic-gate * the code are not to be removed. 18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution 19*0Sstevel@tonic-gate * as the author of the parts of the library used. 20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or 21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package. 22*0Sstevel@tonic-gate * 23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 25*0Sstevel@tonic-gate * are met: 26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright 27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 32*0Sstevel@tonic-gate * must display the following acknowledgement: 33*0Sstevel@tonic-gate * "This product includes cryptographic software written by 34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)" 35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library 36*0Sstevel@tonic-gate * being used are not cryptographic related :-). 37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from 38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement: 39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51*0Sstevel@tonic-gate * SUCH DAMAGE. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or 54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be 55*0Sstevel@tonic-gate * copied and put under another distribution licence 56*0Sstevel@tonic-gate * [including the GNU Public Licence.] 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #ifndef OPENSSL_NO_RC2 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate #include <stdio.h> 62*0Sstevel@tonic-gate #include "cryptlib.h" 63*0Sstevel@tonic-gate #include <openssl/evp.h> 64*0Sstevel@tonic-gate #include <openssl/objects.h> 65*0Sstevel@tonic-gate #include "evp_locl.h" 66*0Sstevel@tonic-gate #include <openssl/rc2.h> 67*0Sstevel@tonic-gate 68*0Sstevel@tonic-gate static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 69*0Sstevel@tonic-gate const unsigned char *iv,int enc); 70*0Sstevel@tonic-gate static int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx); 71*0Sstevel@tonic-gate static int rc2_magic_to_meth(int i); 72*0Sstevel@tonic-gate static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); 73*0Sstevel@tonic-gate static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); 74*0Sstevel@tonic-gate static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate typedef struct 77*0Sstevel@tonic-gate { 78*0Sstevel@tonic-gate int key_bits; /* effective key bits */ 79*0Sstevel@tonic-gate RC2_KEY ks; /* key schedule */ 80*0Sstevel@tonic-gate } EVP_RC2_KEY; 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate #define data(ctx) ((EVP_RC2_KEY *)(ctx)->cipher_data) 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate IMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2, 85*0Sstevel@tonic-gate 8, 86*0Sstevel@tonic-gate RC2_KEY_LENGTH, 8, 64, 87*0Sstevel@tonic-gate EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 88*0Sstevel@tonic-gate rc2_init_key, NULL, 89*0Sstevel@tonic-gate rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, 90*0Sstevel@tonic-gate rc2_ctrl) 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate #define RC2_40_MAGIC 0xa0 93*0Sstevel@tonic-gate #define RC2_64_MAGIC 0x78 94*0Sstevel@tonic-gate #define RC2_128_MAGIC 0x3a 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate static const EVP_CIPHER r2_64_cbc_cipher= 97*0Sstevel@tonic-gate { 98*0Sstevel@tonic-gate NID_rc2_64_cbc, 99*0Sstevel@tonic-gate 8,8 /* 64 bit */,8, 100*0Sstevel@tonic-gate EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 101*0Sstevel@tonic-gate rc2_init_key, 102*0Sstevel@tonic-gate rc2_cbc_cipher, 103*0Sstevel@tonic-gate NULL, 104*0Sstevel@tonic-gate sizeof(EVP_RC2_KEY), 105*0Sstevel@tonic-gate rc2_set_asn1_type_and_iv, 106*0Sstevel@tonic-gate rc2_get_asn1_type_and_iv, 107*0Sstevel@tonic-gate rc2_ctrl, 108*0Sstevel@tonic-gate NULL 109*0Sstevel@tonic-gate }; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate static const EVP_CIPHER r2_40_cbc_cipher= 112*0Sstevel@tonic-gate { 113*0Sstevel@tonic-gate NID_rc2_40_cbc, 114*0Sstevel@tonic-gate 8,5 /* 40 bit */,8, 115*0Sstevel@tonic-gate EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 116*0Sstevel@tonic-gate rc2_init_key, 117*0Sstevel@tonic-gate rc2_cbc_cipher, 118*0Sstevel@tonic-gate NULL, 119*0Sstevel@tonic-gate sizeof(EVP_RC2_KEY), 120*0Sstevel@tonic-gate rc2_set_asn1_type_and_iv, 121*0Sstevel@tonic-gate rc2_get_asn1_type_and_iv, 122*0Sstevel@tonic-gate rc2_ctrl, 123*0Sstevel@tonic-gate NULL 124*0Sstevel@tonic-gate }; 125*0Sstevel@tonic-gate 126*0Sstevel@tonic-gate const EVP_CIPHER *EVP_rc2_64_cbc(void) 127*0Sstevel@tonic-gate { 128*0Sstevel@tonic-gate return(&r2_64_cbc_cipher); 129*0Sstevel@tonic-gate } 130*0Sstevel@tonic-gate 131*0Sstevel@tonic-gate const EVP_CIPHER *EVP_rc2_40_cbc(void) 132*0Sstevel@tonic-gate { 133*0Sstevel@tonic-gate return(&r2_40_cbc_cipher); 134*0Sstevel@tonic-gate } 135*0Sstevel@tonic-gate 136*0Sstevel@tonic-gate static int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 137*0Sstevel@tonic-gate const unsigned char *iv, int enc) 138*0Sstevel@tonic-gate { 139*0Sstevel@tonic-gate RC2_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx), 140*0Sstevel@tonic-gate key,data(ctx)->key_bits); 141*0Sstevel@tonic-gate return 1; 142*0Sstevel@tonic-gate } 143*0Sstevel@tonic-gate 144*0Sstevel@tonic-gate static int rc2_meth_to_magic(EVP_CIPHER_CTX *e) 145*0Sstevel@tonic-gate { 146*0Sstevel@tonic-gate int i; 147*0Sstevel@tonic-gate 148*0Sstevel@tonic-gate EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i); 149*0Sstevel@tonic-gate if (i == 128) return(RC2_128_MAGIC); 150*0Sstevel@tonic-gate else if (i == 64) return(RC2_64_MAGIC); 151*0Sstevel@tonic-gate else if (i == 40) return(RC2_40_MAGIC); 152*0Sstevel@tonic-gate else return(0); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate static int rc2_magic_to_meth(int i) 156*0Sstevel@tonic-gate { 157*0Sstevel@tonic-gate if (i == RC2_128_MAGIC) return 128; 158*0Sstevel@tonic-gate else if (i == RC2_64_MAGIC) return 64; 159*0Sstevel@tonic-gate else if (i == RC2_40_MAGIC) return 40; 160*0Sstevel@tonic-gate else 161*0Sstevel@tonic-gate { 162*0Sstevel@tonic-gate EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE); 163*0Sstevel@tonic-gate return(0); 164*0Sstevel@tonic-gate } 165*0Sstevel@tonic-gate } 166*0Sstevel@tonic-gate 167*0Sstevel@tonic-gate static int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 168*0Sstevel@tonic-gate { 169*0Sstevel@tonic-gate long num=0; 170*0Sstevel@tonic-gate int i=0,l; 171*0Sstevel@tonic-gate int key_bits; 172*0Sstevel@tonic-gate unsigned char iv[EVP_MAX_IV_LENGTH]; 173*0Sstevel@tonic-gate 174*0Sstevel@tonic-gate if (type != NULL) 175*0Sstevel@tonic-gate { 176*0Sstevel@tonic-gate l=EVP_CIPHER_CTX_iv_length(c); 177*0Sstevel@tonic-gate OPENSSL_assert(l <= sizeof iv); 178*0Sstevel@tonic-gate i=ASN1_TYPE_get_int_octetstring(type,&num,iv,l); 179*0Sstevel@tonic-gate if (i != l) 180*0Sstevel@tonic-gate return(-1); 181*0Sstevel@tonic-gate key_bits =rc2_magic_to_meth((int)num); 182*0Sstevel@tonic-gate if (!key_bits) 183*0Sstevel@tonic-gate return(-1); 184*0Sstevel@tonic-gate if(i > 0) EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1); 185*0Sstevel@tonic-gate EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL); 186*0Sstevel@tonic-gate EVP_CIPHER_CTX_set_key_length(c, key_bits / 8); 187*0Sstevel@tonic-gate } 188*0Sstevel@tonic-gate return(i); 189*0Sstevel@tonic-gate } 190*0Sstevel@tonic-gate 191*0Sstevel@tonic-gate static int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 192*0Sstevel@tonic-gate { 193*0Sstevel@tonic-gate long num; 194*0Sstevel@tonic-gate int i=0,j; 195*0Sstevel@tonic-gate 196*0Sstevel@tonic-gate if (type != NULL) 197*0Sstevel@tonic-gate { 198*0Sstevel@tonic-gate num=rc2_meth_to_magic(c); 199*0Sstevel@tonic-gate j=EVP_CIPHER_CTX_iv_length(c); 200*0Sstevel@tonic-gate i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j); 201*0Sstevel@tonic-gate } 202*0Sstevel@tonic-gate return(i); 203*0Sstevel@tonic-gate } 204*0Sstevel@tonic-gate 205*0Sstevel@tonic-gate static int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 206*0Sstevel@tonic-gate { 207*0Sstevel@tonic-gate switch(type) 208*0Sstevel@tonic-gate { 209*0Sstevel@tonic-gate case EVP_CTRL_INIT: 210*0Sstevel@tonic-gate data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8; 211*0Sstevel@tonic-gate return 1; 212*0Sstevel@tonic-gate 213*0Sstevel@tonic-gate case EVP_CTRL_GET_RC2_KEY_BITS: 214*0Sstevel@tonic-gate *(int *)ptr = data(c)->key_bits; 215*0Sstevel@tonic-gate return 1; 216*0Sstevel@tonic-gate 217*0Sstevel@tonic-gate case EVP_CTRL_SET_RC2_KEY_BITS: 218*0Sstevel@tonic-gate if(arg > 0) 219*0Sstevel@tonic-gate { 220*0Sstevel@tonic-gate data(c)->key_bits = arg; 221*0Sstevel@tonic-gate return 1; 222*0Sstevel@tonic-gate } 223*0Sstevel@tonic-gate return 0; 224*0Sstevel@tonic-gate 225*0Sstevel@tonic-gate default: 226*0Sstevel@tonic-gate return -1; 227*0Sstevel@tonic-gate } 228*0Sstevel@tonic-gate } 229*0Sstevel@tonic-gate 230*0Sstevel@tonic-gate #endif 231