[solanum.git] / tools / mkpasswd.c

/* simple password generator by Nelson Minar (minar@reed.edu)
 * copyright 1991, all rights reserved.
 * You can use this code as long as my name stays with it.
 *
 * md5 patch by W. Campbell <wcampbel@botbay.net>
 * Modernization, getopt, etc for the Hybrid IRCD team
 * by W. Campbell
 *
 * /dev/random for salt generation added by
 * Aaron Sethman <androsyn@ratbox.org>
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include "rb_lib.h"
#ifndef __MINGW32__
#include <pwd.h>
#endif

#define FLAG_MD5      0x00000001
#define FLAG_SALT     0x00000002
#define FLAG_PASS     0x00000004
#define FLAG_LENGTH   0x00000008
#define FLAG_BLOWFISH 0x00000010
#define FLAG_ROUNDS   0x00000020
#define FLAG_SHA256   0x00000040
#define FLAG_SHA512   0x00000080


static char *make_md5_salt(int);
static char *make_md5_salt_para(char *);
static char *make_sha256_salt(int);
static char *make_sha256_salt_para(char *);
static char *make_sha512_salt(int);
static char *make_sha512_salt_para(char *);
static char *make_bf_salt(int, int);
static char *make_bf_salt_para(int, char *);
static char *generate_random_salt(char *, int);
static char *generate_poor_salt(char *, int);

static void full_usage(void);
static void brief_usage(void);

static char saltChars[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
       /* 0 .. 63, ascii - 64 */

#ifdef __MINGW32__
#include <conio.h>
#ifdef PASS_MAX
#undef PASS_MAX
#endif
#define PASS_MAX 256
static char getpassbuf[PASS_MAX + 1];

static char *
getpass(const char *prompt)
{
	int c;
	int i = 0;

	memset(getpassbuf, 0, sizeof(getpassbuf));
	fputs(prompt, stderr);
	for(;;)
	{
		c = _getch();
		if(c == '\r')
		{
			getpassbuf[i] = '\0';
			break;
		}
		else if(i < PASS_MAX)
		{
			getpassbuf[i++] = c;
		}
	}
	fputs("\r\n", stderr);

	return getpassbuf;
}
#endif


int
main(int argc, char *argv[])
{
	char *plaintext = NULL;
	int c;
	char *saltpara = NULL;
	char *salt;
	char *hashed;
	int flag = 0;
	int length = 0;		/* Not Set */
	int rounds = 0;		/* Not set, since blowfish needs 4 by default, a side effect
				 * of this being the encryption type parameter must be
				 * specified before the rounds  parameter.
				 */

	while((c = getopt(argc, argv, "xymbr:h?l:s:p:")) != -1)
	{
		switch (c)
		{
		case 'm':
			flag |= FLAG_MD5;
			break;
		case 'b':
			flag |= FLAG_BLOWFISH;
			rounds = 4;
			break;
		case 'l':
			flag |= FLAG_LENGTH;
			length = atoi(optarg);
			break;
		case 'r':
			flag |= FLAG_ROUNDS;
			rounds = atoi(optarg);
			break;
		case 's':
			flag |= FLAG_SALT;
			saltpara = optarg;
			break;
		case 'p':
			flag |= FLAG_PASS;
			plaintext = optarg;
			break;
		case 'x':
			flag |= FLAG_SHA256;
			break;
		case 'y':
			flag |= FLAG_SHA512;
			break;
		case 'h':
			full_usage();
			/* NOT REACHED */
			break;
		case '?':
			brief_usage();
			/* NOT REACHED */
			break;
		default:
			printf("Invalid Option: -%c\n", c);
			break;
		}
	}

	if(flag & FLAG_MD5)
	{
		if(length == 0)
			length = 8;
		if(flag & FLAG_SALT)
			salt = make_md5_salt_para(saltpara);
		else
			salt = make_md5_salt(length);
	}
	else if(flag & FLAG_BLOWFISH)
	{
		if(length == 0)
			length = 22;
		if(flag & FLAG_SALT)
			salt = make_bf_salt_para(rounds, saltpara);
		else
			salt = make_bf_salt(rounds, length);
	}
	else if(flag & FLAG_SHA256)
	{
		if(length == 0)
			length = 16;
		if(flag & FLAG_SALT)
			salt = make_sha256_salt_para(saltpara);
		else
			salt = make_sha256_salt(length);
	}
	else
	{
		if(length == 0)
			length = 16;
		if(flag & FLAG_SALT)
			salt = make_sha512_salt_para(saltpara);
		else
			salt = make_sha512_salt(length);
	}

	if(flag & FLAG_PASS)
	{
		if(!plaintext)
		{
			fprintf(stderr, "Please enter a valid password\n");
			return 1;
		}

		hashed = rb_crypt(plaintext, salt);
	}
	else
	{
		hashed = strdup(rb_crypt(getpass("plaintext: "), salt));
		plaintext = getpass("again: ");

		if (strcmp(rb_crypt(plaintext, salt), hashed) != 0)
		{
			fprintf(stderr, "Passwords do not match\n");
			return 1;
		}
	}

	printf("%s\n", hashed);
	return 0;
}

char *
make_md5_salt_para(char *saltpara)
{
	static char salt[21];
	if(saltpara && (strlen(saltpara) <= 16))
	{
		/* sprintf used because of portability requirements, the length
		 ** is checked above, so it should not be too much of a concern
		 */
		sprintf(salt, "$1$%s$", saltpara);
		return salt;
	}
	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	exit(1);

	/* NOT REACHED */
	return NULL;
}

char *
make_md5_salt(int length)
{
	static char salt[21];
	if(length > 16)
	{
		printf("MD5 salt length too long\n");
		exit(0);
	}
	salt[0] = '$';
	salt[1] = '1';
	salt[2] = '$';
	generate_random_salt(&salt[3], length);
	salt[length + 3] = '$';
	salt[length + 4] = '\0';
	return salt;
}

char *
make_sha256_salt_para(char *saltpara)
{
	static char salt[21];
	if(saltpara && (strlen(saltpara) <= 16))
	{
		/* sprintf used because of portability requirements, the length
		 ** is checked above, so it should not be too much of a concern
		 */
		sprintf(salt, "$5$%s$", saltpara);
		return salt;
	}
	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	exit(1);

	/* NOT REACHED */
	return NULL;
}

char *
make_sha512_salt_para(char *saltpara)
{
	static char salt[21];
	if(saltpara && (strlen(saltpara) <= 16))
	{
		/* sprintf used because of portability requirements, the length
		 ** is checked above, so it should not be too much of a concern
		 */
		sprintf(salt, "$6$%s$", saltpara);
		return salt;
	}
	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	exit(1);

	/* NOT REACHED */
	return NULL;
}


char *
make_sha256_salt(int length)
{
	static char salt[21];
	if(length > 16)
	{
		printf("SHA256 salt length too long\n");
		exit(0);
	}
	salt[0] = '$';
	salt[1] = '5';
	salt[2] = '$';
	generate_random_salt(&salt[3], length);
	salt[length + 3] = '$';
	salt[length + 4] = '\0';
	return salt;
}

char *
make_sha512_salt(int length)
{
	static char salt[21];
	if(length > 16)
	{
		printf("SHA512 salt length too long\n");
		exit(0);
	}
	salt[0] = '$';
	salt[1] = '6';
	salt[2] = '$';
	generate_random_salt(&salt[3], length);
	salt[length + 3] = '$';
	salt[length + 4] = '\0';
	return salt;
}

char *
make_bf_salt_para(int rounds, char *saltpara)
{
	static char salt[31];
	char tbuf[3];
	if(saltpara && (strlen(saltpara) <= 22))
	{
		/* sprintf used because of portability requirements, the length
		 ** is checked above, so it should not be too much of a concern
		 */
		sprintf(tbuf, "%02d", rounds);
		sprintf(salt, "$2a$%s$%s$", tbuf, saltpara);
		return salt;
	}
	printf("Invalid Salt, please use up to 22 random alphanumeric characters\n");
	exit(1);

	/* NOT REACHED */
	return NULL;
}

char *
make_bf_salt(int rounds, int length)
{
	static char salt[31];
	char tbuf[3];
	if(length > 22)
	{
		printf("Blowfish salt length too long\n");
		exit(0);
	}
	sprintf(tbuf, "%02d", rounds);
	sprintf(salt, "$2a$%s$", tbuf);
	generate_random_salt(&salt[7], length);
	salt[length + 7] = '$';
	salt[length + 8] = '\0';
	return salt;
}

char *
generate_poor_salt(char *salt, int length)
{
	int i;
	srand(time(NULL));
	for(i = 0; i < length; i++)
	{
		salt[i] = saltChars[rand() % 64];
	}
	return (salt);
}

char *
generate_random_salt(char *salt, int length)
{
	char *buf;
	int fd, i;
	if((fd = open("/dev/random", O_RDONLY)) < 0)
	{
		return (generate_poor_salt(salt, length));
	}
	buf = calloc(1, length);
	if(read(fd, buf, length) != length)
	{
		free(buf);
		return (generate_poor_salt(salt, length));
	}

	for(i = 0; i < length; i++)
	{
		salt[i] = saltChars[abs(buf[i]) % 64];
	}
	free(buf);
	return (salt);
}

void
full_usage()
{
	printf("mkpasswd [-m|-b|-x|-y] [-l saltlength] [-r rounds] [-s salt] [-p plaintext]\n");
	printf("-x Generate a SHA256 password\n");
	printf("-y Generate a SHA512 password\n");
	printf("-m Generate an MD5 password\n");
	printf("-b Generate a Blowfish password\n");
	printf("-l Specify a length for a random MD5 or Blowfish salt\n");
	printf("-r Specify a number of rounds for a Blowfish password\n");
	printf("   Default 4, no more than 6 recommended\n");
	printf("-s Specify a salt, up to 16 for MD5, SHA256, and SHA512\n");
	printf("   up to 22 for Blowfish\n");
	printf("-p Specify a plaintext password to use\n");
	printf("Example: mkpasswd -m -s 3dr -p test\n");
	exit(0);
}

void
brief_usage()
{
	printf("mkpasswd - password hash generator\n");
	printf("  SHA512:  mkpasswd [-y] [-l saltlength] [-s salt] [-p plaintext]\n");
	printf("  SHA256:  mkpasswd -x [-l saltlength] [-s salt] [-p plaintext]\n");
	printf("     MD5:  mkpasswd -m [-l saltlength] [-s salt] [-p plaintext]\n");
	printf("Blowfish:  mkpasswd -b [-r rounds] [-l saltlength] [-s salt]\n");
	printf("                       [-p plaintext]\n");
	printf("Use -h for full usage\n");
	exit(0);
}
Commit	Line	Data
212380e3	1	/* simple password generator by Nelson Minar (minar@reed.edu)
8522eb3b EM	2	* copyright 1991, all rights reserved.
	3	* You can use this code as long as my name stays with it.
	4	*
	5	* md5 patch by W. Campbell <wcampbel@botbay.net>
	6	* Modernization, getopt, etc for the Hybrid IRCD team
	7	* by W. Campbell
	8	*
	9	* /dev/random for salt generation added by
	10	* Aaron Sethman <androsyn@ratbox.org>
	11	*/
212380e3 AC	12	#include <stdio.h>
	13	#include <string.h>
	14	#include <stdlib.h>
	15	#include <time.h>
	16	#include <unistd.h>
	17	#include <fcntl.h>
fe037171	18	#include "rb_lib.h"
f1d07f6b JT	19	#ifndef __MINGW32__
	20	#include <pwd.h>
	21	#endif
212380e3	22
f1d07f6b	23	#define FLAG_MD5 0x00000001
8522eb3b EM	24	#define FLAG_SALT 0x00000002
	25	#define FLAG_PASS 0x00000004
	26	#define FLAG_LENGTH 0x00000008
	27	#define FLAG_BLOWFISH 0x00000010
	28	#define FLAG_ROUNDS 0x00000020
	29	#define FLAG_SHA256 0x00000040
	30	#define FLAG_SHA512 0x00000080
	31
	32
212380e3 AC	33	static char *make_md5_salt(int);
212380e3 AC	34	static char make_md5_salt_para(char );
f1d07f6b JT	35	static char *make_sha256_salt(int);
	36	static char make_sha256_salt_para(char );
	37	static char *make_sha512_salt(int);
	38	static char make_sha512_salt_para(char );
212380e3 AC	39	static char *make_bf_salt(int, int);
212380e3 AC	40	static char make_bf_salt_para(int, char );
212380e3 AC	41	static char generate_random_salt(char , int);
	42	static char generate_poor_salt(char , int);
	43
	44	static void full_usage(void);
	45	static void brief_usage(void);
	46
f1d07f6b	47	static char saltChars[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
212380e3 AC	48	/* 0 .. 63, ascii - 64 */
212380e3 AC	49
f1d07f6b JT	50	#ifdef __MINGW32__
	51	#include <conio.h>
	52	#ifdef PASS_MAX
	53	#undef PASS_MAX
	54	#endif
	55	#define PASS_MAX 256
	56	static char getpassbuf[PASS_MAX + 1];
	57
	58	static char *
	59	getpass(const char *prompt)
212380e3	60	{
f1d07f6b JT	61	int c;
	62	int i = 0;
	63
29c92cf9	64	memset(getpassbuf, 0, sizeof(getpassbuf));
f1d07f6b JT	65	fputs(prompt, stderr);
	66	for(;;)
	67	{
	68	c = _getch();
	69	if(c == '\r')
	70	{
	71	getpassbuf[i] = '\0';
	72	break;
	73	}
	74	else if(i < PASS_MAX)
	75	{
	76	getpassbuf[i++] = c;
	77	}
	78	}
	79	fputs("\r\n", stderr);
	80
	81	return getpassbuf;
212380e3	82	}
f1d07f6b JT	83	#endif
f1d07f6b JT	84
212380e3	85
f1d07f6b JT	86	int
f1d07f6b JT	87	main(int argc, char *argv[])
212380e3	88	{
f1d07f6b JT	89	char *plaintext = NULL;
	90	int c;
	91	char *saltpara = NULL;
	92	char *salt;
011e38be	93	char *hashed;
f1d07f6b JT	94	int flag = 0;
f1d07f6b JT	95	int length = 0; /* Not Set */
8522eb3b EM	96	int rounds = 0; /* Not set, since blowfish needs 4 by default, a side effect
	97	* of this being the encryption type parameter must be
	98	* specified before the rounds parameter.
f1d07f6b JT	99	*/
f1d07f6b JT	100
8522eb3b	101	while((c = getopt(argc, argv, "xymbr:h?l:s:p:")) != -1)
f1d07f6b JT	102	{
	103	switch (c)
	104	{
	105	case 'm':
	106	flag \|= FLAG_MD5;
	107	break;
f1d07f6b JT	108	case 'b':
	109	flag \|= FLAG_BLOWFISH;
	110	rounds = 4;
	111	break;
f1d07f6b JT	112	case 'l':
	113	flag \|= FLAG_LENGTH;
	114	length = atoi(optarg);
	115	break;
	116	case 'r':
	117	flag \|= FLAG_ROUNDS;
	118	rounds = atoi(optarg);
	119	break;
	120	case 's':
	121	flag \|= FLAG_SALT;
	122	saltpara = optarg;
	123	break;
	124	case 'p':
	125	flag \|= FLAG_PASS;
	126	plaintext = optarg;
	127	break;
	128	case 'x':
	129	flag \|= FLAG_SHA256;
	130	break;
	131	case 'y':
	132	flag \|= FLAG_SHA512;
	133	break;
	134	case 'h':
	135	full_usage();
	136	/* NOT REACHED */
	137	break;
	138	case '?':
	139	brief_usage();
	140	/* NOT REACHED */
	141	break;
	142	default:
	143	printf("Invalid Option: -%c\n", c);
	144	break;
	145	}
	146	}
	147
7600b65f EM	148	if(flag & FLAG_MD5)
	149	{
	150	if(length == 0)
	151	length = 8;
	152	if(flag & FLAG_SALT)
	153	salt = make_md5_salt_para(saltpara);
	154	else
	155	salt = make_md5_salt(length);
	156	}
	157	else if(flag & FLAG_BLOWFISH)
f1d07f6b JT	158	{
	159	if(length == 0)
	160	length = 22;
	161	if(flag & FLAG_SALT)
	162	salt = make_bf_salt_para(rounds, saltpara);
	163	else
	164	salt = make_bf_salt(rounds, length);
	165	}
	166	else if(flag & FLAG_SHA256)
	167	{
	168	if(length == 0)
	169	length = 16;
	170	if(flag & FLAG_SALT)
	171	salt = make_sha256_salt_para(saltpara);
	172	else
	173	salt = make_sha256_salt(length);
	174	}
920cb1dc AC	175	else
	176	{
	177	if(length == 0)
7600b65f	178	length = 16;
920cb1dc	179	if(flag & FLAG_SALT)
7600b65f	180	salt = make_sha512_salt_para(saltpara);
920cb1dc	181	else
7600b65f	182	salt = make_sha512_salt(length);
920cb1dc	183	}
f1d07f6b JT	184
	185	if(flag & FLAG_PASS)
	186	{
	187	if(!plaintext)
011e38be AI	188	{
	189	fprintf(stderr, "Please enter a valid password\n");
	190	return 1;
	191	}
	192
	193	hashed = rb_crypt(plaintext, salt);
f1d07f6b JT	194	}
	195	else
	196	{
011e38be AI	197	hashed = strdup(rb_crypt(getpass("plaintext: "), salt));
	198	plaintext = getpass("again: ");
	199
	200	if (strcmp(rb_crypt(plaintext, salt), hashed) != 0)
	201	{
	202	fprintf(stderr, "Passwords do not match\n");
	203	return 1;
	204	}
f1d07f6b JT	205	}
f1d07f6b JT	206
011e38be	207	printf("%s\n", hashed);
f1d07f6b	208	return 0;
212380e3 AC	209	}
212380e3 AC	210
f1d07f6b JT	211	char *
f1d07f6b JT	212	make_md5_salt_para(char *saltpara)
212380e3	213	{
f1d07f6b JT	214	static char salt[21];
	215	if(saltpara && (strlen(saltpara) <= 16))
	216	{
	217	/* sprintf used because of portability requirements, the length
	218	** is checked above, so it should not be too much of a concern
	219	*/
	220	sprintf(salt, "$1$%s$", saltpara);
	221	return salt;
	222	}
	223	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	224	exit(1);
	225
	226	/* NOT REACHED */
	227	return NULL;
212380e3 AC	228	}
212380e3 AC	229
f1d07f6b JT	230	char *
f1d07f6b JT	231	make_md5_salt(int length)
212380e3	232	{
f1d07f6b JT	233	static char salt[21];
	234	if(length > 16)
	235	{
	236	printf("MD5 salt length too long\n");
	237	exit(0);
	238	}
	239	salt[0] = '$';
	240	salt[1] = '1';
	241	salt[2] = '$';
	242	generate_random_salt(&salt[3], length);
	243	salt[length + 3] = '$';
	244	salt[length + 4] = '\0';
	245	return salt;
212380e3 AC	246	}
212380e3 AC	247
f1d07f6b JT	248	char *
f1d07f6b JT	249	make_sha256_salt_para(char *saltpara)
212380e3	250	{
f1d07f6b JT	251	static char salt[21];
	252	if(saltpara && (strlen(saltpara) <= 16))
	253	{
	254	/* sprintf used because of portability requirements, the length
	255	** is checked above, so it should not be too much of a concern
	256	*/
	257	sprintf(salt, "$5$%s$", saltpara);
	258	return salt;
	259	}
	260	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	261	exit(1);
	262
	263	/* NOT REACHED */
	264	return NULL;
212380e3 AC	265	}
212380e3 AC	266
f1d07f6b JT	267	char *
f1d07f6b JT	268	make_sha512_salt_para(char *saltpara)
212380e3	269	{
f1d07f6b JT	270	static char salt[21];
	271	if(saltpara && (strlen(saltpara) <= 16))
	272	{
	273	/* sprintf used because of portability requirements, the length
	274	** is checked above, so it should not be too much of a concern
	275	*/
	276	sprintf(salt, "$6$%s$", saltpara);
	277	return salt;
	278	}
	279	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	280	exit(1);
	281
	282	/* NOT REACHED */
	283	return NULL;
212380e3 AC	284	}
212380e3 AC	285
f1d07f6b JT	286
	287	char *
	288	make_sha256_salt(int length)
212380e3	289	{
f1d07f6b JT	290	static char salt[21];
	291	if(length > 16)
	292	{
	293	printf("SHA256 salt length too long\n");
	294	exit(0);
	295	}
	296	salt[0] = '$';
	297	salt[1] = '5';
	298	salt[2] = '$';
	299	generate_random_salt(&salt[3], length);
	300	salt[length + 3] = '$';
	301	salt[length + 4] = '\0';
	302	return salt;
	303	}
	304
	305	char *
	306	make_sha512_salt(int length)
	307	{
	308	static char salt[21];
	309	if(length > 16)
	310	{
	311	printf("SHA512 salt length too long\n");
	312	exit(0);
	313	}
	314	salt[0] = '$';
	315	salt[1] = '6';
	316	salt[2] = '$';
	317	generate_random_salt(&salt[3], length);
	318	salt[length + 3] = '$';
	319	salt[length + 4] = '\0';
	320	return salt;
	321	}
	322
	323	char *
	324	make_bf_salt_para(int rounds, char *saltpara)
	325	{
	326	static char salt[31];
	327	char tbuf[3];
	328	if(saltpara && (strlen(saltpara) <= 22))
	329	{
	330	/* sprintf used because of portability requirements, the length
	331	** is checked above, so it should not be too much of a concern
	332	*/
	333	sprintf(tbuf, "%02d", rounds);
	334	sprintf(salt, "$2a$%s$%s$", tbuf, saltpara);
	335	return salt;
	336	}
	337	printf("Invalid Salt, please use up to 22 random alphanumeric characters\n");
	338	exit(1);
	339
	340	/* NOT REACHED */
	341	return NULL;
	342	}
	343
	344	char *
	345	make_bf_salt(int rounds, int length)
	346	{
	347	static char salt[31];
	348	char tbuf[3];
	349	if(length > 22)
	350	{
69b2e745	351	printf("Blowfish salt length too long\n");
f1d07f6b JT	352	exit(0);
	353	}
	354	sprintf(tbuf, "%02d", rounds);
	355	sprintf(salt, "$2a$%s$", tbuf);
	356	generate_random_salt(&salt[7], length);
	357	salt[length + 7] = '$';
	358	salt[length + 8] = '\0';
	359	return salt;
	360	}
	361
	362	char *
	363	generate_poor_salt(char *salt, int length)
	364	{
	365	int i;
	366	srand(time(NULL));
	367	for(i = 0; i < length; i++)
	368	{
	369	salt[i] = saltChars[rand() % 64];
	370	}
	371	return (salt);
	372	}
	373
	374	char *
	375	generate_random_salt(char *salt, int length)
	376	{
	377	char *buf;
	378	int fd, i;
	379	if((fd = open("/dev/random", O_RDONLY)) < 0)
	380	{
	381	return (generate_poor_salt(salt, length));
	382	}
	383	buf = calloc(1, length);
	384	if(read(fd, buf, length) != length)
	385	{
	386	free(buf);
	387	return (generate_poor_salt(salt, length));
	388	}
	389
	390	for(i = 0; i < length; i++)
	391	{
	392	salt[i] = saltChars[abs(buf[i]) % 64];
	393	}
	394	free(buf);
	395	return (salt);
212380e3 AC	396	}
212380e3 AC	397
f1d07f6b JT	398	void
f1d07f6b JT	399	full_usage()
212380e3	400	{
8522eb3b	401	printf("mkpasswd [-m\|-b\|-x\|-y] [-l saltlength] [-r rounds] [-s salt] [-p plaintext]\n");
f1d07f6b JT	402	printf("-x Generate a SHA256 password\n");
	403	printf("-y Generate a SHA512 password\n");
	404	printf("-m Generate an MD5 password\n");
69b2e745	405	printf("-b Generate a Blowfish password\n");
69b2e745	406	printf("-l Specify a length for a random MD5 or Blowfish salt\n");
8522eb3b EM	407	printf("-r Specify a number of rounds for a Blowfish password\n");
	408	printf(" Default 4, no more than 6 recommended\n");
	409	printf("-s Specify a salt, up to 16 for MD5, SHA256, and SHA512\n");
	410	printf(" up to 22 for Blowfish\n");
f1d07f6b JT	411	printf("-p Specify a plaintext password to use\n");
	412	printf("Example: mkpasswd -m -s 3dr -p test\n");
	413	exit(0);
212380e3 AC	414	}
212380e3 AC	415
f1d07f6b JT	416	void
f1d07f6b JT	417	brief_usage()
212380e3	418	{
f1d07f6b	419	printf("mkpasswd - password hash generator\n");
8522eb3b EM	420	printf(" SHA512: mkpasswd [-y] [-l saltlength] [-s salt] [-p plaintext]\n");
	421	printf(" SHA256: mkpasswd -x [-l saltlength] [-s salt] [-p plaintext]\n");
	422	printf(" MD5: mkpasswd -m [-l saltlength] [-s salt] [-p plaintext]\n");
	423	printf("Blowfish: mkpasswd -b [-r rounds] [-l saltlength] [-s salt]\n");
	424	printf(" [-p plaintext]\n");
f1d07f6b JT	425	printf("Use -h for full usage\n");
f1d07f6b JT	426	exit(0);
212380e3	427	}