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/*
* Copyright (C) 2010 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: isc-hmac-fixup.c,v 1.4 2010/03/10 02:17:52 marka Exp $ */
#include <config.h>
#include <isc/base64.h>
#include <isc/buffer.h>
#include <isc/md5.h>
#include <isc/region.h>
#include <isc/result.h>
#include <isc/sha1.h>
#include <isc/sha2.h>
#include <isc/stdio.h>
#include <isc/string.h>
#define HMAC_LEN 64
int
main(int argc, char **argv) {
isc_buffer_t buf;
unsigned char key[1024];
char secret[1024];
char base64[(1024*4)/3];
isc_region_t r;
isc_result_t result;
if (argc != 3) {
fprintf(stderr, "Usage:\t%s algorithm secret\n", argv[0]);
fprintf(stderr, "\talgorithm: (MD5 | SHA1 | SHA224 | "
"SHA256 | SHA384 | SHA512)\n");
return (1);
}
isc_buffer_init(&buf, secret, sizeof(secret));
result = isc_base64_decodestring(argv[2], &buf);
if (result != ISC_R_SUCCESS) {
fprintf(stderr, "error: %s\n", isc_result_totext(result));
return (1);
}
isc__buffer_usedregion(&buf, &r);
if (!strcasecmp(argv[1], "md5") ||
!strcasecmp(argv[1], "hmac-md5")) {
if (r.length > HMAC_LEN) {
isc_md5_t md5ctx;
isc_md5_init(&md5ctx);
isc_md5_update(&md5ctx, r.base, r.length);
isc_md5_final(&md5ctx, key);
r.base = key;
r.length = ISC_MD5_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha1") ||
!strcasecmp(argv[1], "hmac-sha1")) {
if (r.length > ISC_SHA1_DIGESTLENGTH) {
isc_sha1_t sha1ctx;
isc_sha1_init(&sha1ctx);
isc_sha1_update(&sha1ctx, r.base, r.length);
isc_sha1_final(&sha1ctx, key);
r.base = key;
r.length = ISC_SHA1_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha224") ||
!strcasecmp(argv[1], "hmac-sha224")) {
if (r.length > ISC_SHA224_DIGESTLENGTH) {
isc_sha224_t sha224ctx;
isc_sha224_init(&sha224ctx);
isc_sha224_update(&sha224ctx, r.base, r.length);
isc_sha224_final(key, &sha224ctx);
r.base = key;
r.length = ISC_SHA224_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha256") ||
!strcasecmp(argv[1], "hmac-sha256")) {
if (r.length > ISC_SHA256_DIGESTLENGTH) {
isc_sha256_t sha256ctx;
isc_sha256_init(&sha256ctx);
isc_sha256_update(&sha256ctx, r.base, r.length);
isc_sha256_final(key, &sha256ctx);
r.base = key;
r.length = ISC_SHA256_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha384") ||
!strcasecmp(argv[1], "hmac-sha384")) {
if (r.length > ISC_SHA384_DIGESTLENGTH) {
isc_sha384_t sha384ctx;
isc_sha384_init(&sha384ctx);
isc_sha384_update(&sha384ctx, r.base, r.length);
isc_sha384_final(key, &sha384ctx);
r.base = key;
r.length = ISC_SHA384_DIGESTLENGTH;
}
} else if (!strcasecmp(argv[1], "sha512") ||
!strcasecmp(argv[1], "hmac-sha512")) {
if (r.length > ISC_SHA512_DIGESTLENGTH) {
isc_sha512_t sha512ctx;
isc_sha512_init(&sha512ctx);
isc_sha512_update(&sha512ctx, r.base, r.length);
isc_sha512_final(key, &sha512ctx);
r.base = key;
r.length = ISC_SHA512_DIGESTLENGTH;
}
} else {
fprintf(stderr, "unknown hmac/digest algorithm: %s\n", argv[1]);
return (1);
}
isc_buffer_init(&buf, base64, sizeof(base64));
result = isc_base64_totext(&r, 0, "", &buf);
if (result != ISC_R_SUCCESS) {
fprintf(stderr, "error: %s\n", isc_result_totext(result));
return (1);
}
fprintf(stdout, "%.*s\n", (int)isc_buffer_usedlength(&buf), base64);
return (0);
}
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