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aes-decrypt.c
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Niels Möller authored
config.h. Rev: src/nettle/ChangeLog:1.195 Rev: src/nettle/aes-decrypt-table.c:1.4 Rev: src/nettle/aes-decrypt.c:1.5 Rev: src/nettle/aes-encrypt-table.c:1.4 Rev: src/nettle/aes-encrypt.c:1.5 Rev: src/nettle/aes-meta.c:1.3 Rev: src/nettle/aes-set-decrypt-key.c:1.2 Rev: src/nettle/aes-set-encrypt-key.c:1.2 Rev: src/nettle/aes.c:1.12 Rev: src/nettle/aesdata.c:1.2 Rev: src/nettle/arcfour-meta.c:1.2 Rev: src/nettle/arcfour.c:1.3 Rev: src/nettle/base16-decode.c:1.2 Rev: src/nettle/base16-encode.c:1.2 Rev: src/nettle/base16-meta.c:1.3 Rev: src/nettle/base64-decode.c:1.5 Rev: src/nettle/base64-encode.c:1.3 Rev: src/nettle/base64-meta.c:1.4 Rev: src/nettle/bignum-random.c:1.3 Rev: src/nettle/bignum.c:1.7 Rev: src/nettle/blowfish.c:1.4 Rev: src/nettle/buffer-init.c:1.3 Rev: src/nettle/buffer.c:1.8 Rev: src/nettle/cast128-meta.c:1.3 Rev: src/nettle/cast128.c:1.4 Rev: src/nettle/cbc.c:1.6 Rev: src/nettle/des-compat.c:1.10 Rev: src/nettle/des.c:1.7 Rev: src/nettle/des3.c:1.2 Rev: src/nettle/dsa-keygen.c:1.6 Rev: src/nettle/dsa-sign.c:1.7 Rev: src/nettle/dsa-verify.c:1.4 Rev: src/nettle/dsa.c:1.5 Rev: src/nettle/examples/io.c:1.4 Rev: src/nettle/examples/nettle-benchmark.c:1.8 Rev: src/nettle/examples/nettle-openssl.c:1.2 Rev: src/nettle/examples/rsa-keygen.c:1.10 Rev: src/nettle/examples/rsa-sign.c:1.5 Rev: src/nettle/examples/rsa-verify.c:1.4 Rev: src/nettle/hmac-md5.c:1.5 Rev: src/nettle/hmac-sha1.c:1.2 Rev: src/nettle/hmac-sha256.c:1.2 Rev: src/nettle/hmac.c:1.4 Rev: src/nettle/knuth-lfib.c:1.2 Rev: src/nettle/md5-compat.c:1.3 Rev: src/nettle/md5-meta.c:1.2 Rev: src/nettle/md5.c:1.6 Rev: src/nettle/memxor.c:1.2 Rev: src/nettle/nettle-internal.c:1.3 Rev: src/nettle/pgp-encode.c:1.4 Rev: src/nettle/pkcs1-rsa-md5.c:1.2 Rev: src/nettle/pkcs1-rsa-sha1.c:1.2 Rev: src/nettle/pkcs1.c:1.2 Rev: src/nettle/realloc.c:1.3 Rev: src/nettle/rsa-compat.c:1.8 Rev: src/nettle/rsa-decrypt.c:1.4 Rev: src/nettle/rsa-encrypt.c:1.5 Rev: src/nettle/rsa-keygen.c:1.5 Rev: src/nettle/rsa-md5-sign.c:1.2 Rev: src/nettle/rsa-md5-verify.c:1.2 Rev: src/nettle/rsa-sha1-sign.c:1.2 Rev: src/nettle/rsa-sha1-verify.c:1.2 Rev: src/nettle/rsa-sign.c:1.3 Rev: src/nettle/rsa-verify.c:1.2 Rev: src/nettle/rsa.c:1.12 Rev: src/nettle/rsa2openpgp.c:1.2 Rev: src/nettle/rsa2sexp.c:1.7 Rev: src/nettle/serpent-meta.c:1.2 Rev: src/nettle/serpent.c:1.4 Rev: src/nettle/sexp-format.c:1.9 Rev: src/nettle/sexp-transport-format.c:1.2 Rev: src/nettle/sexp-transport.c:1.4 Rev: src/nettle/sexp.c:1.14 Rev: src/nettle/sexp2bignum.c:1.5 Rev: src/nettle/sexp2dsa.c:1.4 Rev: src/nettle/sexp2rsa.c:1.11 Rev: src/nettle/sha1-meta.c:1.2 Rev: src/nettle/sha1.c:1.8 Rev: src/nettle/sha256-meta.c:1.2 Rev: src/nettle/sha256.c:1.3 Rev: src/nettle/tools/input.c:1.2 Rev: src/nettle/tools/misc.c:1.2 Rev: src/nettle/tools/output.c:1.3 Rev: src/nettle/tools/parse.c:1.2 Rev: src/nettle/tools/sexp-conv.c:1.14 Rev: src/nettle/twofish-meta.c:1.2 Rev: src/nettle/twofish.c:1.6 Rev: src/nettle/yarrow256.c:1.17 Rev: src/nettle/yarrow_key_event.c:1.4
Niels Möller authoredconfig.h. Rev: src/nettle/ChangeLog:1.195 Rev: src/nettle/aes-decrypt-table.c:1.4 Rev: src/nettle/aes-decrypt.c:1.5 Rev: src/nettle/aes-encrypt-table.c:1.4 Rev: src/nettle/aes-encrypt.c:1.5 Rev: src/nettle/aes-meta.c:1.3 Rev: src/nettle/aes-set-decrypt-key.c:1.2 Rev: src/nettle/aes-set-encrypt-key.c:1.2 Rev: src/nettle/aes.c:1.12 Rev: src/nettle/aesdata.c:1.2 Rev: src/nettle/arcfour-meta.c:1.2 Rev: src/nettle/arcfour.c:1.3 Rev: src/nettle/base16-decode.c:1.2 Rev: src/nettle/base16-encode.c:1.2 Rev: src/nettle/base16-meta.c:1.3 Rev: src/nettle/base64-decode.c:1.5 Rev: src/nettle/base64-encode.c:1.3 Rev: src/nettle/base64-meta.c:1.4 Rev: src/nettle/bignum-random.c:1.3 Rev: src/nettle/bignum.c:1.7 Rev: src/nettle/blowfish.c:1.4 Rev: src/nettle/buffer-init.c:1.3 Rev: src/nettle/buffer.c:1.8 Rev: src/nettle/cast128-meta.c:1.3 Rev: src/nettle/cast128.c:1.4 Rev: src/nettle/cbc.c:1.6 Rev: src/nettle/des-compat.c:1.10 Rev: src/nettle/des.c:1.7 Rev: src/nettle/des3.c:1.2 Rev: src/nettle/dsa-keygen.c:1.6 Rev: src/nettle/dsa-sign.c:1.7 Rev: src/nettle/dsa-verify.c:1.4 Rev: src/nettle/dsa.c:1.5 Rev: src/nettle/examples/io.c:1.4 Rev: src/nettle/examples/nettle-benchmark.c:1.8 Rev: src/nettle/examples/nettle-openssl.c:1.2 Rev: src/nettle/examples/rsa-keygen.c:1.10 Rev: src/nettle/examples/rsa-sign.c:1.5 Rev: src/nettle/examples/rsa-verify.c:1.4 Rev: src/nettle/hmac-md5.c:1.5 Rev: src/nettle/hmac-sha1.c:1.2 Rev: src/nettle/hmac-sha256.c:1.2 Rev: src/nettle/hmac.c:1.4 Rev: src/nettle/knuth-lfib.c:1.2 Rev: src/nettle/md5-compat.c:1.3 Rev: src/nettle/md5-meta.c:1.2 Rev: src/nettle/md5.c:1.6 Rev: src/nettle/memxor.c:1.2 Rev: src/nettle/nettle-internal.c:1.3 Rev: src/nettle/pgp-encode.c:1.4 Rev: src/nettle/pkcs1-rsa-md5.c:1.2 Rev: src/nettle/pkcs1-rsa-sha1.c:1.2 Rev: src/nettle/pkcs1.c:1.2 Rev: src/nettle/realloc.c:1.3 Rev: src/nettle/rsa-compat.c:1.8 Rev: src/nettle/rsa-decrypt.c:1.4 Rev: src/nettle/rsa-encrypt.c:1.5 Rev: src/nettle/rsa-keygen.c:1.5 Rev: src/nettle/rsa-md5-sign.c:1.2 Rev: src/nettle/rsa-md5-verify.c:1.2 Rev: src/nettle/rsa-sha1-sign.c:1.2 Rev: src/nettle/rsa-sha1-verify.c:1.2 Rev: src/nettle/rsa-sign.c:1.3 Rev: src/nettle/rsa-verify.c:1.2 Rev: src/nettle/rsa.c:1.12 Rev: src/nettle/rsa2openpgp.c:1.2 Rev: src/nettle/rsa2sexp.c:1.7 Rev: src/nettle/serpent-meta.c:1.2 Rev: src/nettle/serpent.c:1.4 Rev: src/nettle/sexp-format.c:1.9 Rev: src/nettle/sexp-transport-format.c:1.2 Rev: src/nettle/sexp-transport.c:1.4 Rev: src/nettle/sexp.c:1.14 Rev: src/nettle/sexp2bignum.c:1.5 Rev: src/nettle/sexp2dsa.c:1.4 Rev: src/nettle/sexp2rsa.c:1.11 Rev: src/nettle/sha1-meta.c:1.2 Rev: src/nettle/sha1.c:1.8 Rev: src/nettle/sha256-meta.c:1.2 Rev: src/nettle/sha256.c:1.3 Rev: src/nettle/tools/input.c:1.2 Rev: src/nettle/tools/misc.c:1.2 Rev: src/nettle/tools/output.c:1.3 Rev: src/nettle/tools/parse.c:1.2 Rev: src/nettle/tools/sexp-conv.c:1.14 Rev: src/nettle/twofish-meta.c:1.2 Rev: src/nettle/twofish.c:1.6 Rev: src/nettle/yarrow256.c:1.17 Rev: src/nettle/yarrow_key_event.c:1.4
des3.c 2.04 KiB
/* des3.h
*
* Triple DES cipher. Three key encrypt-decrypt-encrypt.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001 Niels Mller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#include "des.h"
/* It's possible to make some more general pipe construction, like the
* lsh/src/cascade.c, but as in practice it's never used for anything
* like triple DES, it's not worth the effort. */
/* On success, returns 1 and sets ctx->status to DES_OK (zero). On
* error, returns 0 and sets ctx->status accordingly. */
int
des3_set_key(struct des3_ctx *ctx, const uint8_t *key)
{
unsigned i;
for (i = 0; i<3; i++, key += DES_KEY_SIZE)
if (!des_set_key(&ctx->des[i], key))
{
ctx->status = ctx->des[i].status;
return 0;
}
ctx->status = DES_OK;
return 1;
}
void
des3_encrypt(struct des3_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src)
{
des_encrypt(&ctx->des[0],
length, dst, src);
des_decrypt(&ctx->des[1],
length, dst, dst);
des_encrypt(&ctx->des[2],
length, dst, dst);
}
void
des3_decrypt(struct des3_ctx *ctx,
unsigned length, uint8_t *dst,
const uint8_t *src)
{
des_decrypt(&ctx->des[2],
length, dst, src);
des_encrypt(&ctx->des[1],
length, dst, dst);
des_decrypt(&ctx->des[0],
length, dst, dst);
}