168651Skris/* crypto/evp/e_rc2.c */ 268651Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 368651Skris * All rights reserved. 468651Skris * 568651Skris * This package is an SSL implementation written 668651Skris * by Eric Young (eay@cryptsoft.com). 768651Skris * The implementation was written so as to conform with Netscapes SSL. 868651Skris * 968651Skris * This library is free for commercial and non-commercial use as long as 1068651Skris * the following conditions are aheared to. The following conditions 1168651Skris * apply to all code found in this distribution, be it the RC4, RSA, 1268651Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1368651Skris * included with this distribution is covered by the same copyright terms 1468651Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1568651Skris * 1668651Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1768651Skris * the code are not to be removed. 1868651Skris * If this package is used in a product, Eric Young should be given attribution 1968651Skris * as the author of the parts of the library used. 2068651Skris * This can be in the form of a textual message at program startup or 2168651Skris * in documentation (online or textual) provided with the package. 2268651Skris * 2368651Skris * Redistribution and use in source and binary forms, with or without 2468651Skris * modification, are permitted provided that the following conditions 2568651Skris * are met: 2668651Skris * 1. Redistributions of source code must retain the copyright 2768651Skris * notice, this list of conditions and the following disclaimer. 2868651Skris * 2. Redistributions in binary form must reproduce the above copyright 2968651Skris * notice, this list of conditions and the following disclaimer in the 3068651Skris * documentation and/or other materials provided with the distribution. 3168651Skris * 3. All advertising materials mentioning features or use of this software 3268651Skris * must display the following acknowledgement: 3368651Skris * "This product includes cryptographic software written by 3468651Skris * Eric Young (eay@cryptsoft.com)" 3568651Skris * The word 'cryptographic' can be left out if the rouines from the library 3668651Skris * being used are not cryptographic related :-). 3768651Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3868651Skris * the apps directory (application code) you must include an acknowledgement: 3968651Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4068651Skris * 4168651Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4268651Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4368651Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4468651Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4568651Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4668651Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4768651Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4868651Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4968651Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5068651Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5168651Skris * SUCH DAMAGE. 5268651Skris * 5368651Skris * The licence and distribution terms for any publically available version or 5468651Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5568651Skris * copied and put under another distribution licence 5668651Skris * [including the GNU Public Licence.] 5768651Skris */ 5868651Skris 59160814Ssimon#include <stdio.h> 60160814Ssimon#include "cryptlib.h" 61160814Ssimon 62109998Smarkm#ifndef OPENSSL_NO_RC2 6368651Skris 6468651Skris#include <openssl/evp.h> 6568651Skris#include <openssl/objects.h> 6668651Skris#include "evp_locl.h" 67109998Smarkm#include <openssl/rc2.h> 6868651Skris 6968651Skrisstatic int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 7068651Skris const unsigned char *iv,int enc); 7168651Skrisstatic int rc2_meth_to_magic(EVP_CIPHER_CTX *ctx); 7268651Skrisstatic int rc2_magic_to_meth(int i); 7368651Skrisstatic int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); 7468651Skrisstatic int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type); 7568651Skrisstatic int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); 7668651Skris 77109998Smarkmtypedef struct 78109998Smarkm { 79109998Smarkm int key_bits; /* effective key bits */ 80109998Smarkm RC2_KEY ks; /* key schedule */ 81109998Smarkm } EVP_RC2_KEY; 82109998Smarkm 83109998Smarkm#define data(ctx) ((EVP_RC2_KEY *)(ctx)->cipher_data) 84109998Smarkm 85109998SmarkmIMPLEMENT_BLOCK_CIPHER(rc2, ks, RC2, EVP_RC2_KEY, NID_rc2, 8668651Skris 8, 87109998Smarkm RC2_KEY_LENGTH, 8, 64, 8868651Skris EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 8968651Skris rc2_init_key, NULL, 9068651Skris rc2_set_asn1_type_and_iv, rc2_get_asn1_type_and_iv, 9168651Skris rc2_ctrl) 9268651Skris 9368651Skris#define RC2_40_MAGIC 0xa0 9468651Skris#define RC2_64_MAGIC 0x78 9568651Skris#define RC2_128_MAGIC 0x3a 9668651Skris 97109998Smarkmstatic const EVP_CIPHER r2_64_cbc_cipher= 9868651Skris { 9968651Skris NID_rc2_64_cbc, 10068651Skris 8,8 /* 64 bit */,8, 10168651Skris EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 10268651Skris rc2_init_key, 10368651Skris rc2_cbc_cipher, 10468651Skris NULL, 105109998Smarkm sizeof(EVP_RC2_KEY), 10668651Skris rc2_set_asn1_type_and_iv, 10768651Skris rc2_get_asn1_type_and_iv, 10868651Skris rc2_ctrl, 10968651Skris NULL 11068651Skris }; 11168651Skris 112109998Smarkmstatic const EVP_CIPHER r2_40_cbc_cipher= 11368651Skris { 11468651Skris NID_rc2_40_cbc, 11568651Skris 8,5 /* 40 bit */,8, 11668651Skris EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CTRL_INIT, 11768651Skris rc2_init_key, 11868651Skris rc2_cbc_cipher, 11968651Skris NULL, 120109998Smarkm sizeof(EVP_RC2_KEY), 12168651Skris rc2_set_asn1_type_and_iv, 12268651Skris rc2_get_asn1_type_and_iv, 12368651Skris rc2_ctrl, 12468651Skris NULL 12568651Skris }; 12668651Skris 127109998Smarkmconst EVP_CIPHER *EVP_rc2_64_cbc(void) 12868651Skris { 12968651Skris return(&r2_64_cbc_cipher); 13068651Skris } 13168651Skris 132109998Smarkmconst EVP_CIPHER *EVP_rc2_40_cbc(void) 13368651Skris { 13468651Skris return(&r2_40_cbc_cipher); 13568651Skris } 13668651Skris 13768651Skrisstatic int rc2_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, 13868651Skris const unsigned char *iv, int enc) 13968651Skris { 140109998Smarkm RC2_set_key(&data(ctx)->ks,EVP_CIPHER_CTX_key_length(ctx), 141109998Smarkm key,data(ctx)->key_bits); 14268651Skris return 1; 14368651Skris } 14468651Skris 14568651Skrisstatic int rc2_meth_to_magic(EVP_CIPHER_CTX *e) 14668651Skris { 14768651Skris int i; 14868651Skris 14968651Skris EVP_CIPHER_CTX_ctrl(e, EVP_CTRL_GET_RC2_KEY_BITS, 0, &i); 15068651Skris if (i == 128) return(RC2_128_MAGIC); 15168651Skris else if (i == 64) return(RC2_64_MAGIC); 15268651Skris else if (i == 40) return(RC2_40_MAGIC); 15368651Skris else return(0); 15468651Skris } 15568651Skris 15668651Skrisstatic int rc2_magic_to_meth(int i) 15768651Skris { 15868651Skris if (i == RC2_128_MAGIC) return 128; 15968651Skris else if (i == RC2_64_MAGIC) return 64; 16068651Skris else if (i == RC2_40_MAGIC) return 40; 16168651Skris else 16268651Skris { 16368651Skris EVPerr(EVP_F_RC2_MAGIC_TO_METH,EVP_R_UNSUPPORTED_KEY_SIZE); 16468651Skris return(0); 16568651Skris } 16668651Skris } 16768651Skris 16868651Skrisstatic int rc2_get_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 16968651Skris { 17068651Skris long num=0; 171160814Ssimon int i=0; 17268651Skris int key_bits; 173160814Ssimon unsigned int l; 17468651Skris unsigned char iv[EVP_MAX_IV_LENGTH]; 17568651Skris 17668651Skris if (type != NULL) 17768651Skris { 17868651Skris l=EVP_CIPHER_CTX_iv_length(c); 179160814Ssimon OPENSSL_assert(l <= sizeof(iv)); 18068651Skris i=ASN1_TYPE_get_int_octetstring(type,&num,iv,l); 181160814Ssimon if (i != (int)l) 18268651Skris return(-1); 18368651Skris key_bits =rc2_magic_to_meth((int)num); 18468651Skris if (!key_bits) 18568651Skris return(-1); 186238405Sjkim if(i > 0 && !EVP_CipherInit_ex(c, NULL, NULL, NULL, iv, -1)) 187238405Sjkim return -1; 18868651Skris EVP_CIPHER_CTX_ctrl(c, EVP_CTRL_SET_RC2_KEY_BITS, key_bits, NULL); 18968651Skris EVP_CIPHER_CTX_set_key_length(c, key_bits / 8); 19068651Skris } 19168651Skris return(i); 19268651Skris } 19368651Skris 19468651Skrisstatic int rc2_set_asn1_type_and_iv(EVP_CIPHER_CTX *c, ASN1_TYPE *type) 19568651Skris { 19668651Skris long num; 19768651Skris int i=0,j; 19868651Skris 19968651Skris if (type != NULL) 20068651Skris { 20168651Skris num=rc2_meth_to_magic(c); 20268651Skris j=EVP_CIPHER_CTX_iv_length(c); 20368651Skris i=ASN1_TYPE_set_int_octetstring(type,num,c->oiv,j); 20468651Skris } 20568651Skris return(i); 20668651Skris } 20768651Skris 20868651Skrisstatic int rc2_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) 20968651Skris { 210109998Smarkm switch(type) 211109998Smarkm { 212109998Smarkm case EVP_CTRL_INIT: 213109998Smarkm data(c)->key_bits = EVP_CIPHER_CTX_key_length(c) * 8; 214109998Smarkm return 1; 21568651Skris 216109998Smarkm case EVP_CTRL_GET_RC2_KEY_BITS: 217109998Smarkm *(int *)ptr = data(c)->key_bits; 218109998Smarkm return 1; 219109998Smarkm 220109998Smarkm case EVP_CTRL_SET_RC2_KEY_BITS: 221109998Smarkm if(arg > 0) 222109998Smarkm { 223109998Smarkm data(c)->key_bits = arg; 22468651Skris return 1; 22568651Skris } 226109998Smarkm return 0; 227238405Sjkim#ifdef PBE_PRF_TEST 228238405Sjkim case EVP_CTRL_PBE_PRF_NID: 229238405Sjkim *(int *)ptr = NID_hmacWithMD5; 230238405Sjkim return 1; 231238405Sjkim#endif 23268651Skris 233109998Smarkm default: 234109998Smarkm return -1; 23568651Skris } 23668651Skris } 23768651Skris 23868651Skris#endif 239