/contrib/bind9/bin/tools/nsec3hash.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 122 lines · 90 code · 16 blank · 16 comment · 12 complexity · 22376bbc167ae29be21c607df165a5f5 MD5 · raw file
- /*
- * Copyright (C) 2006, 2008, 2009, 2011, 2012 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.
- */
- /* $Id$ */
- #include <config.h>
- #include <stdlib.h>
- #include <stdarg.h>
- #include <isc/base32.h>
- #include <isc/buffer.h>
- #include <isc/hex.h>
- #include <isc/iterated_hash.h>
- #include <isc/print.h>
- #include <isc/result.h>
- #include <isc/string.h>
- #include <isc/types.h>
- #include <dns/fixedname.h>
- #include <dns/name.h>
- #include <dns/nsec3.h>
- #include <dns/types.h>
- const char *program = "nsec3hash";
- ISC_PLATFORM_NORETURN_PRE static void
- fatal(const char *format, ...) ISC_PLATFORM_NORETURN_POST;
- static void
- fatal(const char *format, ...) {
- va_list args;
- fprintf(stderr, "%s: ", program);
- va_start(args, format);
- vfprintf(stderr, format, args);
- va_end(args);
- fprintf(stderr, "\n");
- exit(1);
- }
- static void
- check_result(isc_result_t result, const char *message) {
- if (result != ISC_R_SUCCESS)
- fatal("%s: %s", message, isc_result_totext(result));
- }
- static void
- usage() {
- printf("Usage: %s salt algorithm iterations domain\n", program);
- exit(1);
- }
- int
- main(int argc, char **argv) {
- dns_fixedname_t fixed;
- dns_name_t *name;
- isc_buffer_t buffer;
- isc_region_t region;
- isc_result_t result;
- unsigned char hash[NSEC3_MAX_HASH_LENGTH];
- unsigned char salt[DNS_NSEC3_SALTSIZE];
- unsigned char text[1024];
- unsigned int hash_alg;
- unsigned int length;
- unsigned int iterations;
- unsigned int salt_length;
- if (argc != 5)
- usage();
- if (strcmp(argv[1], "-") == 0) {
- salt_length = 0;
- salt[0] = 0;
- } else {
- isc_buffer_init(&buffer, salt, sizeof(salt));
- result = isc_hex_decodestring(argv[1], &buffer);
- check_result(result, "isc_hex_decodestring(salt)");
- salt_length = isc_buffer_usedlength(&buffer);
- if (salt_length > DNS_NSEC3_SALTSIZE)
- fatal("salt too long");
- }
- hash_alg = atoi(argv[2]);
- if (hash_alg > 255U)
- fatal("hash algorithm too large");
- iterations = atoi(argv[3]);
- if (iterations > 0xffffU)
- fatal("iterations to large");
- dns_fixedname_init(&fixed);
- name = dns_fixedname_name(&fixed);
- isc_buffer_init(&buffer, argv[4], strlen(argv[4]));
- isc_buffer_add(&buffer, strlen(argv[4]));
- result = dns_name_fromtext(name, &buffer, dns_rootname, 0, NULL);
- check_result(result, "dns_name_fromtext() failed");
- dns_name_downcase(name, name, NULL);
- length = isc_iterated_hash(hash, hash_alg, iterations, salt,
- salt_length, name->ndata, name->length);
- if (length == 0)
- fatal("isc_iterated_hash failed");
- region.base = hash;
- region.length = length;
- isc_buffer_init(&buffer, text, sizeof(text));
- isc_base32hex_totext(®ion, 1, "", &buffer);
- fprintf(stdout, "%.*s (salt=%s, hash=%u, iterations=%u)\n",
- (int)isc_buffer_usedlength(&buffer), text, argv[1], hash_alg, iterations);
- return(0);
- }