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/*-
* Copyright (c) 2010-2011 Varnish Software AS
* All rights reserved.
*
* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
*
* 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.
*
* 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 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 "config.h"
#include <sys/types.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
#include "vas.h"
#include "vcli.h"
#include "vsha256.h"
void
VCLI_AuthResponse(int S_fd, const char *challenge,
char response[CLI_AUTH_RESPONSE_LEN + 1])
{
SHA256_CTX ctx;
uint8_t buf[BUFSIZ];
int i;
assert(CLI_AUTH_RESPONSE_LEN == (SHA256_LEN * 2));
SHA256_Init(&ctx);
SHA256_Update(&ctx, challenge, 32);
SHA256_Update(&ctx, "\n", 1);
do {
i = read(S_fd, buf, sizeof buf);
if (i > 0)
SHA256_Update(&ctx, buf, i);
} while (i > 0);
SHA256_Update(&ctx, challenge, 32);
SHA256_Update(&ctx, "\n", 1);
SHA256_Final(buf, &ctx);
for(i = 0; i < SHA256_LEN; i++)
sprintf(response + 2 * i, "%02x", buf[i]);
}
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