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Diffstat (limited to 'openssl/crypto/evp/e_des.c')
| -rw-r--r-- | openssl/crypto/evp/e_des.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_des.c b/openssl/crypto/evp/e_des.c new file mode 100644 index 00000000..ca009f2c --- /dev/null +++ b/openssl/crypto/evp/e_des.c @@ -0,0 +1,224 @@ +/* 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 |