diff options
Diffstat (limited to 'src/crypto/cipher/e_des.c')
| -rw-r--r-- | src/crypto/cipher/e_des.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/crypto/cipher/e_des.c b/src/crypto/cipher/e_des.c new file mode 100644 index 0000000..d4b04f4 --- /dev/null +++ b/src/crypto/cipher/e_des.c @@ -0,0 +1,157 @@ +/* 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 <openssl/cipher.h> +#include <openssl/des.h> +#include <openssl/obj.h> + +#include "internal.h" + + +#define EVP_MAXCHUNK (1<<30) + +typedef struct { + union { + double align; + DES_key_schedule ks; + } ks; +} EVP_DES_KEY; + +static int des_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key, + const uint8_t *iv, int enc) { + DES_cblock *deskey = (DES_cblock *)key; + EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data; + + DES_set_key(deskey, &dat->ks.ks); + return 1; +} + +static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in, + size_t in_len) { + EVP_DES_KEY *dat = (EVP_DES_KEY *)ctx->cipher_data; + + while (in_len >= EVP_MAXCHUNK) { + DES_ncbc_encrypt(in, out, EVP_MAXCHUNK, &dat->ks.ks, (DES_cblock *)ctx->iv, + ctx->encrypt); + in_len -= EVP_MAXCHUNK; + in += EVP_MAXCHUNK; + out += EVP_MAXCHUNK; + } + + if (in_len) { + DES_ncbc_encrypt(in, out, (long)in_len, &dat->ks.ks, + (DES_cblock *)ctx->iv, ctx->encrypt); + } + + return 1; +} + +static const EVP_CIPHER des_cbc = { + NID_des_cbc, 8 /* block_size */, 8 /* key_size */, + 8 /* iv_len */, sizeof(EVP_DES_KEY), EVP_CIPH_CBC_MODE, + NULL /* app_data */, des_init_key, des_cbc_cipher, + NULL /* cleanup */, NULL /* ctrl */, }; + +const EVP_CIPHER *EVP_des_cbc(void) { return &des_cbc; } + + +typedef struct { + union { + double align; + DES_key_schedule ks[3]; + } ks; +} DES_EDE_KEY; + + +static int des_ede3_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key, + const uint8_t *iv, int enc) { + DES_cblock *deskey = (DES_cblock *)key; + DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data; + + DES_set_key(&deskey[0], &dat->ks.ks[0]); + DES_set_key(&deskey[1], &dat->ks.ks[1]); + DES_set_key(&deskey[2], &dat->ks.ks[2]); + + return 1; +} + +static int des_ede3_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, + const uint8_t *in, size_t in_len) { + DES_EDE_KEY *dat = (DES_EDE_KEY*) ctx->cipher_data; + + while (in_len >= EVP_MAXCHUNK) { + DES_ede3_cbc_encrypt(in, out, EVP_MAXCHUNK, &dat->ks.ks[0], &dat->ks.ks[1], + &dat->ks.ks[2], (DES_cblock *)ctx->iv, ctx->encrypt); + in_len -= EVP_MAXCHUNK; + in += EVP_MAXCHUNK; + out += EVP_MAXCHUNK; + } + + if (in_len) { + DES_ede3_cbc_encrypt(in, out, in_len, &dat->ks.ks[0], &dat->ks.ks[1], + &dat->ks.ks[2], (DES_cblock *)ctx->iv, ctx->encrypt); + } + + return 1; +} + +static const EVP_CIPHER des3_cbc = { + NID_des_cbc, 8 /* block_size */, 24 /* key_size */, + 8 /* iv_len */, sizeof(DES_EDE_KEY), EVP_CIPH_CBC_MODE, + NULL /* app_data */, des_ede3_init_key, des_ede3_cbc_cipher, + NULL /* cleanup */, NULL /* ctrl */, }; + +const EVP_CIPHER *EVP_des_ede3_cbc(void) { return &des3_cbc; } |