mirror of
https://github.com/cryb-to/cryb-to.git
synced 2024-11-25 15:15:42 +00:00
6ed802ddf3
that AC_CHECK_DECLS([foo]), unlike AC_CHECK_FUNCS([foo]), will always
define HAVE_FOO, so #ifdef HAVE_FOO will always be true even if it is 0.
This commit finally fixes the [bl]e{32,64}{enc,dec} issue on Linux.
103 lines
3 KiB
C
103 lines
3 KiB
C
/*-
|
|
* Copyright (c) 2012 The University of Oslo
|
|
* Copyright (c) 2012 Dag-Erling Smørgrav
|
|
* All rights reserved.
|
|
*
|
|
* 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 above 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. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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.
|
|
*/
|
|
|
|
#include "cryb/impl.h"
|
|
|
|
#if HAVE_SYS_ENDIAN_H
|
|
#include <sys/endian.h>
|
|
#endif
|
|
|
|
#if HAVE_ENDIAN_H
|
|
#define _BSD_SOURCE
|
|
#include <endian.h>
|
|
#endif
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include <cryb/hmac_sha1.h>
|
|
|
|
void
|
|
hmac_sha1_init(hmac_sha1_ctx *ctx, const void *key, size_t keylen)
|
|
{
|
|
uint8_t keybuf[SHA1_BLOCK_LEN], pad[SHA1_BLOCK_LEN];
|
|
|
|
/* prepare key */
|
|
memset(keybuf, 0, sizeof keybuf);
|
|
if (keylen > sizeof keybuf)
|
|
sha1_complete(key, keylen, keybuf);
|
|
else
|
|
memcpy(keybuf, key, keylen);
|
|
|
|
/* input pad */
|
|
for (unsigned int i = 0; i < sizeof pad; ++i)
|
|
pad[i] = 0x36 ^ keybuf[i];
|
|
sha1_init(&ctx->ictx);
|
|
sha1_update(&ctx->ictx, pad, sizeof pad);
|
|
|
|
/* output pad */
|
|
for (unsigned int i = 0; i < sizeof pad; ++i)
|
|
pad[i] = 0x5c ^ keybuf[i];
|
|
sha1_init(&ctx->octx);
|
|
sha1_update(&ctx->octx, pad, sizeof pad);
|
|
|
|
/* hide the evidence */
|
|
memset(keybuf, 0, sizeof keybuf);
|
|
memset(pad, 0, sizeof pad);
|
|
}
|
|
|
|
void
|
|
hmac_sha1_update(hmac_sha1_ctx *ctx, const void *buf, size_t len)
|
|
{
|
|
|
|
sha1_update(&ctx->ictx, buf, len);
|
|
}
|
|
|
|
void
|
|
hmac_sha1_final(hmac_sha1_ctx *ctx, uint8_t *mac)
|
|
{
|
|
uint8_t digest[SHA1_DIGEST_LEN];
|
|
|
|
sha1_final(&ctx->ictx, digest);
|
|
sha1_update(&ctx->octx, digest, sizeof digest);
|
|
sha1_final(&ctx->octx, mac);
|
|
memset(ctx, 0, sizeof *ctx);
|
|
}
|
|
|
|
void
|
|
hmac_sha1_complete(const void *key, size_t keylen,
|
|
const void *buf, size_t len, uint8_t *mac)
|
|
{
|
|
hmac_sha1_ctx ctx;
|
|
|
|
hmac_sha1_init(&ctx, key, keylen);
|
|
hmac_sha1_update(&ctx, buf, len);
|
|
hmac_sha1_final(&ctx, mac);
|
|
}
|