| /* 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, size_t 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, size_t inl) |
| { |
| while(inl>=EVP_MAXCHUNK) |
| { |
| DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, |
| (DES_cblock *)ctx->iv, &ctx->num); |
| inl-=EVP_MAXCHUNK; |
| in +=EVP_MAXCHUNK; |
| out+=EVP_MAXCHUNK; |
| } |
| if (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, size_t inl) |
| { |
| while(inl>=EVP_MAXCHUNK) |
| { |
| DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, |
| (DES_cblock *)ctx->iv, ctx->encrypt); |
| inl-=EVP_MAXCHUNK; |
| in +=EVP_MAXCHUNK; |
| out+=EVP_MAXCHUNK; |
| } |
| if (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, size_t inl) |
| { |
| while(inl>=EVP_MAXCHUNK) |
| { |
| DES_cfb64_encrypt(in,out, (long)EVP_MAXCHUNK, ctx->cipher_data, |
| (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); |
| inl-=EVP_MAXCHUNK; |
| in +=EVP_MAXCHUNK; |
| out+=EVP_MAXCHUNK; |
| } |
| if (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, size_t inl) |
| { |
| size_t n,chunk=EVP_MAXCHUNK/8; |
| unsigned char c[1],d[1]; |
| |
| if (inl<chunk) chunk=inl; |
| |
| while (inl && inl>=chunk) |
| { |
| for(n=0 ; n < chunk*8; ++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 >> (unsigned int)(n%8))) | |
| ((d[0]&0x80) >> (unsigned int)(n%8)); |
| } |
| inl-=chunk; |
| in +=chunk; |
| out+=chunk; |
| if (inl<chunk) chunk=inl; |
| } |
| |
| return 1; |
| } |
| |
| static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| const unsigned char *in, size_t inl) |
| { |
| while (inl>=EVP_MAXCHUNK) |
| { |
| DES_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,ctx->cipher_data, |
| (DES_cblock *)ctx->iv,ctx->encrypt); |
| inl-=EVP_MAXCHUNK; |
| in +=EVP_MAXCHUNK; |
| out+=EVP_MAXCHUNK; |
| } |
| if (inl) |
| DES_cfb_encrypt(in,out,8,(long)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 |