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/*
 * Derived from:
 *
 * MDDRIVER.C - test driver for MD2, MD4 and MD5
 */

/*
 *  Copyright (C) 1990-2, RSA Data Security, Inc. Created 1990. All
 *  rights reserved.
 *
 *  RSA Data Security, Inc. makes no representations concerning either
 *  the merchantability of this software or the suitability of this
 *  software for any particular purpose. It is provided "as is"
 *  without express or implied warranty of any kind.
 *
 *  These notices must be retained in any copies of any part of this
 *  documentation and/or software.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sbin/md5/md5.c 235309 2012-05-12 00:47:21Z eadler $");

#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <err.h>
#include <md5.h>
#include <ripemd.h>
#include <sha.h>
#include <sha256.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

/*
 * Length of test block, number of test blocks.
 */
#define TEST_BLOCK_LEN 10000
#define TEST_BLOCK_COUNT 100000
#define MDTESTCOUNT 8

int qflag;
int rflag;
int sflag;
unsigned char* checkAgainst;
int	checksFailed;

typedef void (DIGEST_Init)(void *);
typedef void (DIGEST_Update)(void *, const unsigned char *, size_t);
typedef char *(DIGEST_End)(void *, char *);

extern const char *MD5TestOutput[MDTESTCOUNT];
extern const char *SHA1_TestOutput[MDTESTCOUNT];
extern const char *SHA256_TestOutput[MDTESTCOUNT];
extern const char *RIPEMD160_TestOutput[MDTESTCOUNT];

typedef struct Algorithm_t {
	const char *progname;
	const char *name;
	const char *(*TestOutput)[MDTESTCOUNT];
	DIGEST_Init *Init;
	DIGEST_Update *Update;
	DIGEST_End *End;
	char *(*Data)(const void *, unsigned int, char *);
	char *(*File)(const char *, char *);
} Algorithm_t;

static void MD5_Update(MD5_CTX *, const unsigned char *, size_t);
static void MDString(Algorithm_t *, const char *);
static void MDTimeTrial(Algorithm_t *);
static void MDTestSuite(Algorithm_t *);
static void MDFilter(Algorithm_t *, int);
static void usage(Algorithm_t *);

typedef union {
	MD5_CTX md5;
	SHA1_CTX sha1;
	SHA256_CTX sha256;
	RIPEMD160_CTX ripemd160;
} DIGEST_CTX;

/* max(MD5_DIGEST_LENGTH, SHA_DIGEST_LENGTH,
	SHA256_DIGEST_LENGTH, RIPEMD160_DIGEST_LENGTH)*2+1 */
#define HEX_DIGEST_LENGTH 65

/* algorithm function table */

struct Algorithm_t Algorithm[] = {
	{ "md5", "MD5", &MD5TestOutput, (DIGEST_Init*)&MD5Init,
		(DIGEST_Update*)&MD5_Update, (DIGEST_End*)&MD5End,
		&MD5Data, &MD5File },
	{ "sha1", "SHA1", &SHA1_TestOutput, (DIGEST_Init*)&SHA1_Init,
		(DIGEST_Update*)&SHA1_Update, (DIGEST_End*)&SHA1_End,
		&SHA1_Data, &SHA1_File },
	{ "sha256", "SHA256", &SHA256_TestOutput, (DIGEST_Init*)&SHA256_Init,
		(DIGEST_Update*)&SHA256_Update, (DIGEST_End*)&SHA256_End,
		&SHA256_Data, &SHA256_File },
	{ "rmd160", "RMD160", &RIPEMD160_TestOutput,
		(DIGEST_Init*)&RIPEMD160_Init, (DIGEST_Update*)&RIPEMD160_Update,
		(DIGEST_End*)&RIPEMD160_End, &RIPEMD160_Data, &RIPEMD160_File }
};

static void
MD5_Update(MD5_CTX *c, const unsigned char *data, size_t len)
{
	MD5Update(c, data, len);
}

/* Main driver.

Arguments (may be any combination):
  -sstring - digests string
  -t       - runs time trial
  -x       - runs test script
  filename - digests file
  (none)   - digests standard input
 */
int
main(int argc, char *argv[])
{
	int	ch;
	char   *p;
	char	buf[HEX_DIGEST_LENGTH];
	int	failed;
 	unsigned	digest;
 	const char*	progname;

 	if ((progname = strrchr(argv[0], '/')) == NULL)
 		progname = argv[0];
 	else
 		progname++;

 	for (digest = 0; digest < sizeof(Algorithm)/sizeof(*Algorithm); digest++)
 		if (strcasecmp(Algorithm[digest].progname, progname) == 0)
 			break;

 	if (digest == sizeof(Algorithm)/sizeof(*Algorithm))
 		digest = 0;

	failed = 0;
	checkAgainst = NULL;
	checksFailed = 0;
	while ((ch = getopt(argc, argv, "c:pqrs:tx")) != -1)
		switch (ch) {
		case 'c':
			checkAgainst = optarg;
			break;
		case 'p':
			MDFilter(&Algorithm[digest], 1);
			break;
		case 'q':
			qflag = 1;
			break;
		case 'r':
			rflag = 1;
			break;
		case 's':
			sflag = 1;
			MDString(&Algorithm[digest], optarg);
			break;
		case 't':
			MDTimeTrial(&Algorithm[digest]);
			break;
		case 'x':
			MDTestSuite(&Algorithm[digest]);
			break;
		default:
			usage(&Algorithm[digest]);
		}
	argc -= optind;
	argv += optind;

	if (*argv) {
		do {
			p = Algorithm[digest].File(*argv, buf);
			if (!p) {
				warn("%s", *argv);
				failed++;
			} else {
				if (qflag)
					printf("%s", p);
				else if (rflag)
					printf("%s %s", p, *argv);
				else
					printf("%s (%s) = %s",
					    Algorithm[digest].name, *argv, p);
				if (checkAgainst && strcmp(checkAgainst,p))
				{
					checksFailed++;
					if (!qflag)
						printf(" [ Failed ]");
				}
				printf("\n");
			}
		} while (*++argv);
	} else if (!sflag && (optind == 1 || qflag || rflag))
		MDFilter(&Algorithm[digest], 0);

	if (failed != 0)
		return (1);
	if (checksFailed != 0)
		return (2);

	return (0);
}
/*
 * Digests a string and prints the result.
 */
static void
MDString(Algorithm_t *alg, const char *string)
{
	size_t len = strlen(string);
	char buf[HEX_DIGEST_LENGTH];

	alg->Data(string,len,buf);
	if (qflag)
		printf("%s", buf);
	else if (rflag)
		printf("%s \"%s\"", buf, string);
	else
		printf("%s (\"%s\") = %s", alg->name, string, buf);
	if (checkAgainst && strcmp(buf,checkAgainst))
	{
		checksFailed++;
		if (!qflag)
			printf(" [ failed ]");
	}
	printf("\n");
}
/*
 * Measures the time to digest TEST_BLOCK_COUNT TEST_BLOCK_LEN-byte blocks.
 */
static void
MDTimeTrial(Algorithm_t *alg)
{
	DIGEST_CTX context;
	struct rusage before, after;
	struct timeval total;
	float seconds;
	unsigned char block[TEST_BLOCK_LEN];
	unsigned int i;
	char *p, buf[HEX_DIGEST_LENGTH];

	printf("%s time trial. Digesting %d %d-byte blocks ...",
	    alg->name, TEST_BLOCK_COUNT, TEST_BLOCK_LEN);
	fflush(stdout);

	/* Initialize block */
	for (i = 0; i < TEST_BLOCK_LEN; i++)
		block[i] = (unsigned char) (i & 0xff);

	/* Start timer */
	getrusage(RUSAGE_SELF, &before);

	/* Digest blocks */
	alg->Init(&context);
	for (i = 0; i < TEST_BLOCK_COUNT; i++)
		alg->Update(&context, block, TEST_BLOCK_LEN);
	p = alg->End(&context, buf);

	/* Stop timer */
	getrusage(RUSAGE_SELF, &after);
	timersub(&after.ru_utime, &before.ru_utime, &total);
	seconds = total.tv_sec + (float) total.tv_usec / 1000000;

	printf(" done\n");
	printf("Digest = %s", p);
	printf("\nTime = %f seconds\n", seconds);
	printf("Speed = %f bytes/second\n",
	    (float) TEST_BLOCK_LEN * (float) TEST_BLOCK_COUNT / seconds);
}
/*
 * Digests a reference suite of strings and prints the results.
 */

const char *MDTestInput[MDTESTCOUNT] = {
	"",
	"a",
	"abc",
	"message digest",
	"abcdefghijklmnopqrstuvwxyz",
	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
	"12345678901234567890123456789012345678901234567890123456789012345678901234567890",
	"MD5 has not yet (2001-09-03) been broken, but sufficient attacks have been made \
that its security is in some doubt"
};

const char *MD5TestOutput[MDTESTCOUNT] = {
	"d41d8cd98f00b204e9800998ecf8427e",
	"0cc175b9c0f1b6a831c399e269772661",
	"900150983cd24fb0d6963f7d28e17f72",
	"f96b697d7cb7938d525a2f31aaf161d0",
	"c3fcd3d76192e4007dfb496cca67e13b",
	"d174ab98d277d9f5a5611c2c9f419d9f",
	"57edf4a22be3c955ac49da2e2107b67a",
	"b50663f41d44d92171cb9976bc118538"
};

const char *SHA1_TestOutput[MDTESTCOUNT] = {
	"da39a3ee5e6b4b0d3255bfef95601890afd80709",
	"86f7e437faa5a7fce15d1ddcb9eaeaea377667b8",
	"a9993e364706816aba3e25717850c26c9cd0d89d",
	"c12252ceda8be8994d5fa0290a47231c1d16aae3",
	"32d10c7b8cf96570ca04ce37f2a19d84240d3a89",
	"761c457bf73b14d27e9e9265c46f4b4dda11f940",
	"50abf5706a150990a08b2c5ea40fa0e585554732",
	"18eca4333979c4181199b7b4fab8786d16cf2846"
};

const char *SHA256_TestOutput[MDTESTCOUNT] = {
	"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
	"ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb",
	"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
	"f7846f55cf23e14eebeab5b4e1550cad5b509e3348fbc4efa3a1413d393cb650",
	"71c480df93d6ae2f1efad1447c66c9525e316218cf51fc8d9ed832f2daf18b73",
	"db4bfcbd4da0cd85a60c3c37d3fbd8805c77f15fc6b1fdfe614ee0a7c8fdb4c0",
	"f371bc4a311f2b009eef952dd83ca80e2b60026c8e935592d0f9c308453c813e",
	"e6eae09f10ad4122a0e2a4075761d185a272ebd9f5aa489e998ff2f09cbfdd9f"
};

const char *RIPEMD160_TestOutput[MDTESTCOUNT] = {
	"9c1185a5c5e9fc54612808977ee8f548b2258d31",
	"0bdc9d2d256b3ee9daae347be6f4dc835a467ffe",
	"8eb208f7e05d987a9b044a8e98c6b087f15a0bfc",
	"5d0689ef49d2fae572b881b123a85ffa21595f36",
	"f71c27109c692c1b56bbdceb5b9d2865b3708dbc",
	"b0e20b6e3116640286ed3a87a5713079b21f5189",
	"9b752e45573d4b39f4dbd3323cab82bf63326bfb",
	"5feb69c6bf7c29d95715ad55f57d8ac5b2b7dd32"
};

static void
MDTestSuite(Algorithm_t *alg)
{
	int i;
	char buffer[HEX_DIGEST_LENGTH];

	printf("%s test suite:\n", alg->name);
	for (i = 0; i < MDTESTCOUNT; i++) {
		(*alg->Data)(MDTestInput[i], strlen(MDTestInput[i]), buffer);
		printf("%s (\"%s\") = %s", alg->name, MDTestInput[i], buffer);
		if (strcmp(buffer, (*alg->TestOutput)[i]) == 0)
			printf(" - verified correct\n");
		else
			printf(" - INCORRECT RESULT!\n");
	}
}

/*
 * Digests the standard input and prints the result.
 */
static void
MDFilter(Algorithm_t *alg, int tee)
{
	DIGEST_CTX context;
	unsigned int len;
	unsigned char buffer[BUFSIZ];
	char buf[HEX_DIGEST_LENGTH];

	alg->Init(&context);
	while ((len = fread(buffer, 1, BUFSIZ, stdin))) {
		if (tee && len != fwrite(buffer, 1, len, stdout))
			err(1, "stdout");
		alg->Update(&context, buffer, len);
	}
	printf("%s\n", alg->End(&context, buf));
}

static void
usage(Algorithm_t *alg)
{

	fprintf(stderr, "usage: %s [-pqrtx] [-c string] [-s string] [files ...]\n", alg->progname);
	exit(1);
}

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