/* crypto/evp/e_des.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdio.h> #include "cryptlib.h" #ifndef OPENSSL_NO_DES #include <openssl/evp.h> #include <openssl/objects.h> #include "evp_locl.h" #include <openssl/des.h> #include <openssl/rand.h> static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc); static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); /* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */ static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) { BLOCK_CIPHER_ecb_loop() DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), ctx->cipher_data, ctx->encrypt); return 1; } static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) { DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num); return 1; } static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) { DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, ctx->encrypt); return 1; } static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) { DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); return 1; } /* Although we have a CFB-r implementation for DES, it doesn't pack the right way, so wrap it here */ static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) { unsigned int n; unsigned char c[1],d[1]; for(n=0 ; n < inl ; ++n) { c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv, ctx->encrypt); out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8)); } return 1; } static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, unsigned int inl) { DES_cfb_encrypt(in,out,8,inl,ctx->cipher_data,(DES_cblock *)ctx->iv, ctx->encrypt); return 1; } BLOCK_CIPHER_defs(des, DES_key_schedule, NID_des, 8, 8, 8, 64, EVP_CIPH_RAND_KEY, des_init_key, NULL, EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, des_ctrl) BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,1, EVP_CIPH_RAND_KEY, des_init_key, NULL, EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv,des_ctrl) BLOCK_CIPHER_def_cfb(des,DES_key_schedule,NID_des,8,8,8, EVP_CIPH_RAND_KEY, des_init_key,NULL, EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv,des_ctrl) static int des_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc) { DES_cblock *deskey = (DES_cblock *)key; #ifdef EVP_CHECK_DES_KEY if(DES_set_key_checked(deskey,ctx->cipher_data) != 0) return 0; #else DES_set_key_unchecked(deskey,ctx->cipher_data); #endif return 1; } static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) { switch(type) { case EVP_CTRL_RAND_KEY: if (RAND_bytes(ptr, 8) <= 0) return 0; DES_set_odd_parity((DES_cblock *)ptr); return 1; default: return -1; } } #endif