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Diffstat (limited to 'openssl/crypto/evp/e_des.c')
| -rw-r--r-- | openssl/crypto/evp/e_des.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_des.c b/openssl/crypto/evp/e_des.c new file mode 100644 index 0000000..8ca65cd --- /dev/null +++ b/openssl/crypto/evp/e_des.c @@ -0,0 +1,269 @@ +/* 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> + +typedef struct { + union { + double align; + DES_key_schedule ks; + } ks; + union { + void (*cbc) (const void *, void *, size_t, + const DES_key_schedule *, unsigned char *); + } stream; +} EVP_DES_KEY; + +# if defined(AES_ASM) && (defined(__sparc) || defined(__sparc__)) +/* ----------^^^ this is not a typo, just a way to detect that + * assembler support was in general requested... */ +# include "sparc_arch.h" + +extern unsigned int OPENSSL_sparcv9cap_P[]; + +# define SPARC_DES_CAPABLE (OPENSSL_sparcv9cap_P[1] & CFR_DES) + +void des_t4_key_expand(const void *key, DES_key_schedule *ks); +void des_t4_cbc_encrypt(const void *inp, void *out, size_t len, + const DES_key_schedule *ks, unsigned char iv[8]); +void des_t4_cbc_decrypt(const void *inp, void *out, size_t len, + const DES_key_schedule *ks, unsigned char iv[8]); +# endif + +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) +{ + EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; + + if (dat->stream.cbc != NULL) { + (*dat->stream.cbc) (in, out, inl, &dat->ks.ks, ctx->iv); + return 1; + } + 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, EVP_DES_KEY, 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, EVP_DES_KEY, 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, EVP_DES_KEY, 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; + EVP_DES_KEY *dat = (EVP_DES_KEY *) ctx->cipher_data; + + dat->stream.cbc = NULL; +# if defined(SPARC_DES_CAPABLE) + if (SPARC_DES_CAPABLE) { + int mode = ctx->cipher->flags & EVP_CIPH_MODE; + + if (mode == EVP_CIPH_CBC_MODE) { + des_t4_key_expand(key, &dat->ks.ks); + dat->stream.cbc = enc ? des_t4_cbc_encrypt : des_t4_cbc_decrypt; + return 1; + } + } +# endif +# ifdef EVP_CHECK_DES_KEY + if (DES_set_key_checked(deskey, dat->ks.ks) != 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 |