[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>
**
** $Id: mkpasswd.c 26439 2009-02-01 15:27:24Z jilles $
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <fcntl.h>
#include "ratbox_lib.h"
#ifndef __MINGW32__
#include <pwd.h>
#endif

#define FLAG_MD5      0x00000001
#define FLAG_DES      0x00000002
#define FLAG_SALT     0x00000004
#define FLAG_PASS     0x00000008
#define FLAG_LENGTH   0x00000010
#define FLAG_BLOWFISH 0x00000020
#define FLAG_ROUNDS   0x00000040
#define FLAG_EXT      0x00000080
#define FLAG_SHA256   0x00000100
#define FLAG_SHA512   0x00000200


static char *make_des_salt(void);
static char *make_ext_salt(int);
static char *make_ext_salt_para(int, char *);
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 *int_to_base64(int);
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 */

extern char *optarg;


#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, sizeof(getpassbuf), 0);
	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 extended DES needs 25 and 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, "xymdber:h?l:s:p:")) != -1)
	{
		switch (c)
		{
		case 'm':
			flag |= FLAG_MD5;
			break;
		case 'd':
			flag |= FLAG_DES;
			break;
		case 'b':
			flag |= FLAG_BLOWFISH;
			rounds = 4;
			break;
		case 'e':
			flag |= FLAG_EXT;
			rounds = 25;
			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(flag & FLAG_EXT)
	{
		/* XXX - rounds needs to be done */
		if(flag & FLAG_SALT)
		{
			if((strlen(saltpara) == 4))
			{
				salt = make_ext_salt_para(rounds, saltpara);
			}
			else
			{
				printf("Invalid salt, please enter 4 alphanumeric characters\n");
				exit(1);
			}
		}
		else
		{
			salt = make_ext_salt(rounds);
		}
	}
	else if (flag & FLAG_DES)
	{
		if(flag & FLAG_SALT)
		{
			if((strlen(saltpara) == 2))
			{
				salt = saltpara;
			}
			else
			{
				printf("Invalid salt, please enter 2 alphanumeric characters\n");
				exit(1);
			}
		}
		else
		{
			salt = make_des_salt();
		}
	}
	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;
}

static char *
make_des_salt()
{
	static char salt[3];
	generate_random_salt(salt, 2);
	salt[2] = '\0';
	return salt;
}

char *
int_to_base64(int value)
{
	static char buf[5];
	int i;

	for(i = 0; i < 4; i++)
	{
		buf[i] = saltChars[value & 63];
		value >>= 6;	/* Right shifting 6 places is the same as dividing by 64 */
	}

	buf[i] = '\0';		/* not REALLY needed as it's static, and thus initialized
				 ** to \0.
				 */
	return buf;
}

char *
make_ext_salt(int rounds)
{
	static char salt[10];

	sprintf(salt, "_%s", int_to_base64(rounds));
	generate_random_salt(&salt[5], 4);
	salt[9] = '\0';
	return salt;
}

char *
make_ext_salt_para(int rounds, char *saltpara)
{
	static char salt[10];

	sprintf(salt, "_%s%s", int_to_base64(rounds), saltpara);
	return salt;
}

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|-d|-b|-e] [-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("-d Generate a DES password\n");
	printf("-b Generate a Blowfish password\n");
	printf("-e Generate an Extended DES 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 or Extended DES password\n");
	printf("   Blowfish:  default 4, no more than 6 recommended\n");
	printf("   Extended DES:  default 25\n");
	printf("-s Specify a salt, 2 alphanumeric characters for DES, up to 16 for MD5,\n");
	printf("   up to 22 for Blowfish, and 4 for Extended DES\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("Standard DES:  mkpasswd [-d] [-s salt] [-p plaintext]\n");
	printf("Extended DES:  mkpasswd -e [-r rounds] [-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 AC	1	/* simple password generator by Nelson Minar (minar@reed.edu)
	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
55abcbb2 KB	8	**
55abcbb2 KB	9	** /dev/random for salt generation added by
212380e3 AC	10	** Aaron Sethman <androsyn@ratbox.org>
212380e3 AC	11	**
f1d07f6b	12	** $Id: mkpasswd.c 26439 2009-02-01 15:27:24Z jilles $
212380e3 AC	13	*/
	14	#include <stdio.h>
	15	#include <string.h>
	16	#include <stdlib.h>
	17	#include <time.h>
	18	#include <unistd.h>
	19	#include <fcntl.h>
f1d07f6b JT	20	#include "ratbox_lib.h"
	21	#ifndef __MINGW32__
	22	#include <pwd.h>
	23	#endif
212380e3	24
f1d07f6b JT	25	#define FLAG_MD5 0x00000001
	26	#define FLAG_DES 0x00000002
	27	#define FLAG_SALT 0x00000004
	28	#define FLAG_PASS 0x00000008
	29	#define FLAG_LENGTH 0x00000010
212380e3	30	#define FLAG_BLOWFISH 0x00000020
f1d07f6b JT	31	#define FLAG_ROUNDS 0x00000040
	32	#define FLAG_EXT 0x00000080
	33	#define FLAG_SHA256 0x00000100
	34	#define FLAG_SHA512 0x00000200
212380e3	35
212380e3 AC	36
	37	static char *make_des_salt(void);
	38	static char *make_ext_salt(int);
	39	static char make_ext_salt_para(int, char );
	40	static char *make_md5_salt(int);
	41	static char make_md5_salt_para(char );
f1d07f6b JT	42	static char *make_sha256_salt(int);
	43	static char make_sha256_salt_para(char );
	44	static char *make_sha512_salt(int);
	45	static char make_sha512_salt_para(char );
212380e3 AC	46	static char *make_bf_salt(int, int);
	47	static char make_bf_salt_para(int, char );
	48	static char *int_to_base64(int);
	49	static char generate_random_salt(char , int);
	50	static char generate_poor_salt(char , int);
	51
	52	static void full_usage(void);
	53	static void brief_usage(void);
	54
f1d07f6b	55	static char saltChars[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
212380e3 AC	56	/* 0 .. 63, ascii - 64 */
	57
	58	extern char *optarg;
	59
f1d07f6b JT	60
	61	#ifdef __MINGW32__
	62	#include <conio.h>
	63	#ifdef PASS_MAX
	64	#undef PASS_MAX
	65	#endif
	66	#define PASS_MAX 256
	67	static char getpassbuf[PASS_MAX + 1];
	68
	69	static char *
	70	getpass(const char *prompt)
212380e3	71	{
f1d07f6b JT	72	int c;
	73	int i = 0;
	74
	75	memset(getpassbuf, sizeof(getpassbuf), 0);
	76	fputs(prompt, stderr);
	77	for(;;)
	78	{
	79	c = _getch();
	80	if(c == '\r')
	81	{
	82	getpassbuf[i] = '\0';
	83	break;
	84	}
	85	else if(i < PASS_MAX)
	86	{
	87	getpassbuf[i++] = c;
	88	}
	89	}
	90	fputs("\r\n", stderr);
	91
	92	return getpassbuf;
212380e3	93	}
f1d07f6b JT	94	#endif
f1d07f6b JT	95
212380e3	96
f1d07f6b JT	97	int
f1d07f6b JT	98	main(int argc, char *argv[])
212380e3	99	{
f1d07f6b JT	100	char *plaintext = NULL;
	101	int c;
	102	char *saltpara = NULL;
	103	char *salt;
011e38be	104	char *hashed;
f1d07f6b JT	105	int flag = 0;
	106	int length = 0; /* Not Set */
	107	int rounds = 0; /* Not set, since extended DES needs 25 and blowfish needs
	108	** 4 by default, a side effect of this being the encryption
	109	** type parameter must be specified before the rounds
	110	** parameter.
	111	*/
	112
	113	while((c = getopt(argc, argv, "xymdber:h?l:s:p:")) != -1)
	114	{
	115	switch (c)
	116	{
	117	case 'm':
	118	flag \|= FLAG_MD5;
	119	break;
	120	case 'd':
	121	flag \|= FLAG_DES;
	122	break;
	123	case 'b':
	124	flag \|= FLAG_BLOWFISH;
	125	rounds = 4;
	126	break;
	127	case 'e':
	128	flag \|= FLAG_EXT;
	129	rounds = 25;
	130	break;
	131	case 'l':
	132	flag \|= FLAG_LENGTH;
	133	length = atoi(optarg);
	134	break;
	135	case 'r':
	136	flag \|= FLAG_ROUNDS;
	137	rounds = atoi(optarg);
	138	break;
	139	case 's':
	140	flag \|= FLAG_SALT;
	141	saltpara = optarg;
	142	break;
	143	case 'p':
	144	flag \|= FLAG_PASS;
	145	plaintext = optarg;
	146	break;
	147	case 'x':
	148	flag \|= FLAG_SHA256;
	149	break;
	150	case 'y':
	151	flag \|= FLAG_SHA512;
	152	break;
	153	case 'h':
	154	full_usage();
	155	/* NOT REACHED */
	156	break;
	157	case '?':
	158	brief_usage();
	159	/* NOT REACHED */
	160	break;
	161	default:
	162	printf("Invalid Option: -%c\n", c);
	163	break;
	164	}
	165	}
	166
7600b65f EM	167	if(flag & FLAG_MD5)
	168	{
	169	if(length == 0)
	170	length = 8;
	171	if(flag & FLAG_SALT)
	172	salt = make_md5_salt_para(saltpara);
	173	else
	174	salt = make_md5_salt(length);
	175	}
	176	else if(flag & FLAG_BLOWFISH)
f1d07f6b JT	177	{
	178	if(length == 0)
	179	length = 22;
	180	if(flag & FLAG_SALT)
	181	salt = make_bf_salt_para(rounds, saltpara);
	182	else
	183	salt = make_bf_salt(rounds, length);
	184	}
	185	else if(flag & FLAG_SHA256)
	186	{
	187	if(length == 0)
	188	length = 16;
	189	if(flag & FLAG_SALT)
	190	salt = make_sha256_salt_para(saltpara);
	191	else
	192	salt = make_sha256_salt(length);
	193	}
f1d07f6b JT	194	else if(flag & FLAG_EXT)
	195	{
	196	/* XXX - rounds needs to be done */
	197	if(flag & FLAG_SALT)
	198	{
	199	if((strlen(saltpara) == 4))
	200	{
	201	salt = make_ext_salt_para(rounds, saltpara);
	202	}
	203	else
	204	{
	205	printf("Invalid salt, please enter 4 alphanumeric characters\n");
	206	exit(1);
	207	}
	208	}
	209	else
	210	{
	211	salt = make_ext_salt(rounds);
	212	}
	213	}
920cb1dc	214	else if (flag & FLAG_DES)
f1d07f6b JT	215	{
	216	if(flag & FLAG_SALT)
	217	{
	218	if((strlen(saltpara) == 2))
	219	{
	220	salt = saltpara;
	221	}
	222	else
	223	{
	224	printf("Invalid salt, please enter 2 alphanumeric characters\n");
	225	exit(1);
	226	}
	227	}
	228	else
	229	{
	230	salt = make_des_salt();
	231	}
	232	}
920cb1dc AC	233	else
	234	{
	235	if(length == 0)
7600b65f	236	length = 16;
920cb1dc	237	if(flag & FLAG_SALT)
7600b65f	238	salt = make_sha512_salt_para(saltpara);
920cb1dc	239	else
7600b65f	240	salt = make_sha512_salt(length);
920cb1dc	241	}
f1d07f6b JT	242
	243	if(flag & FLAG_PASS)
	244	{
	245	if(!plaintext)
011e38be AI	246	{
	247	fprintf(stderr, "Please enter a valid password\n");
	248	return 1;
	249	}
	250
	251	hashed = rb_crypt(plaintext, salt);
f1d07f6b JT	252	}
	253	else
	254	{
011e38be AI	255	hashed = strdup(rb_crypt(getpass("plaintext: "), salt));
	256	plaintext = getpass("again: ");
	257
	258	if (strcmp(rb_crypt(plaintext, salt), hashed) != 0)
	259	{
	260	fprintf(stderr, "Passwords do not match\n");
	261	return 1;
	262	}
f1d07f6b JT	263	}
f1d07f6b JT	264
011e38be	265	printf("%s\n", hashed);
f1d07f6b	266	return 0;
212380e3 AC	267	}
212380e3 AC	268
f1d07f6b JT	269	static char *
f1d07f6b JT	270	make_des_salt()
212380e3	271	{
f1d07f6b JT	272	static char salt[3];
	273	generate_random_salt(salt, 2);
	274	salt[2] = '\0';
	275	return salt;
212380e3 AC	276	}
212380e3 AC	277
f1d07f6b JT	278	char *
f1d07f6b JT	279	int_to_base64(int value)
212380e3	280	{
f1d07f6b JT	281	static char buf[5];
f1d07f6b JT	282	int i;
212380e3	283
f1d07f6b JT	284	for(i = 0; i < 4; i++)
	285	{
	286	buf[i] = saltChars[value & 63];
	287	value >>= 6; /* Right shifting 6 places is the same as dividing by 64 */
	288	}
	289
	290	buf[i] = '\0'; /* not REALLY needed as it's static, and thus initialized
	291	** to \0.
	292	*/
	293	return buf;
212380e3 AC	294	}
212380e3 AC	295
f1d07f6b JT	296	char *
f1d07f6b JT	297	make_ext_salt(int rounds)
212380e3	298	{
f1d07f6b	299	static char salt[10];
212380e3	300
f1d07f6b JT	301	sprintf(salt, "_%s", int_to_base64(rounds));
	302	generate_random_salt(&salt[5], 4);
	303	salt[9] = '\0';
	304	return salt;
212380e3 AC	305	}
212380e3 AC	306
f1d07f6b JT	307	char *
f1d07f6b JT	308	make_ext_salt_para(int rounds, char *saltpara)
212380e3	309	{
f1d07f6b JT	310	static char salt[10];
	311
	312	sprintf(salt, "_%s%s", int_to_base64(rounds), saltpara);
	313	return salt;
212380e3	314	}
f1d07f6b JT	315
	316	char *
	317	make_md5_salt_para(char *saltpara)
212380e3	318	{
f1d07f6b JT	319	static char salt[21];
	320	if(saltpara && (strlen(saltpara) <= 16))
	321	{
	322	/* sprintf used because of portability requirements, the length
	323	** is checked above, so it should not be too much of a concern
	324	*/
	325	sprintf(salt, "$1$%s$", saltpara);
	326	return salt;
	327	}
	328	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	329	exit(1);
	330
	331	/* NOT REACHED */
	332	return NULL;
212380e3 AC	333	}
212380e3 AC	334
f1d07f6b JT	335	char *
f1d07f6b JT	336	make_md5_salt(int length)
212380e3	337	{
f1d07f6b JT	338	static char salt[21];
	339	if(length > 16)
	340	{
	341	printf("MD5 salt length too long\n");
	342	exit(0);
	343	}
	344	salt[0] = '$';
	345	salt[1] = '1';
	346	salt[2] = '$';
	347	generate_random_salt(&salt[3], length);
	348	salt[length + 3] = '$';
	349	salt[length + 4] = '\0';
	350	return salt;
212380e3 AC	351	}
212380e3 AC	352
f1d07f6b JT	353	char *
f1d07f6b JT	354	make_sha256_salt_para(char *saltpara)
212380e3	355	{
f1d07f6b JT	356	static char salt[21];
	357	if(saltpara && (strlen(saltpara) <= 16))
	358	{
	359	/* sprintf used because of portability requirements, the length
	360	** is checked above, so it should not be too much of a concern
	361	*/
	362	sprintf(salt, "$5$%s$", saltpara);
	363	return salt;
	364	}
	365	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	366	exit(1);
	367
	368	/* NOT REACHED */
	369	return NULL;
212380e3 AC	370	}
212380e3 AC	371
f1d07f6b JT	372	char *
f1d07f6b JT	373	make_sha512_salt_para(char *saltpara)
212380e3	374	{
f1d07f6b JT	375	static char salt[21];
	376	if(saltpara && (strlen(saltpara) <= 16))
	377	{
	378	/* sprintf used because of portability requirements, the length
	379	** is checked above, so it should not be too much of a concern
	380	*/
	381	sprintf(salt, "$6$%s$", saltpara);
	382	return salt;
	383	}
	384	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	385	exit(1);
	386
	387	/* NOT REACHED */
	388	return NULL;
212380e3 AC	389	}
212380e3 AC	390
f1d07f6b JT	391
	392	char *
	393	make_sha256_salt(int length)
212380e3	394	{
f1d07f6b JT	395	static char salt[21];
	396	if(length > 16)
	397	{
	398	printf("SHA256 salt length too long\n");
	399	exit(0);
	400	}
	401	salt[0] = '$';
	402	salt[1] = '5';
	403	salt[2] = '$';
	404	generate_random_salt(&salt[3], length);
	405	salt[length + 3] = '$';
	406	salt[length + 4] = '\0';
	407	return salt;
	408	}
	409
	410	char *
	411	make_sha512_salt(int length)
	412	{
	413	static char salt[21];
	414	if(length > 16)
	415	{
	416	printf("SHA512 salt length too long\n");
	417	exit(0);
	418	}
	419	salt[0] = '$';
	420	salt[1] = '6';
	421	salt[2] = '$';
	422	generate_random_salt(&salt[3], length);
	423	salt[length + 3] = '$';
	424	salt[length + 4] = '\0';
	425	return salt;
	426	}
	427
	428	char *
	429	make_bf_salt_para(int rounds, char *saltpara)
	430	{
	431	static char salt[31];
	432	char tbuf[3];
	433	if(saltpara && (strlen(saltpara) <= 22))
	434	{
	435	/* sprintf used because of portability requirements, the length
	436	** is checked above, so it should not be too much of a concern
	437	*/
	438	sprintf(tbuf, "%02d", rounds);
	439	sprintf(salt, "$2a$%s$%s$", tbuf, saltpara);
	440	return salt;
	441	}
	442	printf("Invalid Salt, please use up to 22 random alphanumeric characters\n");
	443	exit(1);
	444
	445	/* NOT REACHED */
	446	return NULL;
	447	}
	448
	449	char *
	450	make_bf_salt(int rounds, int length)
	451	{
	452	static char salt[31];
	453	char tbuf[3];
	454	if(length > 22)
	455	{
69b2e745	456	printf("Blowfish salt length too long\n");
f1d07f6b JT	457	exit(0);
	458	}
	459	sprintf(tbuf, "%02d", rounds);
	460	sprintf(salt, "$2a$%s$", tbuf);
	461	generate_random_salt(&salt[7], length);
	462	salt[length + 7] = '$';
	463	salt[length + 8] = '\0';
	464	return salt;
	465	}
	466
	467	char *
	468	generate_poor_salt(char *salt, int length)
	469	{
	470	int i;
	471	srand(time(NULL));
	472	for(i = 0; i < length; i++)
	473	{
	474	salt[i] = saltChars[rand() % 64];
	475	}
	476	return (salt);
	477	}
	478
	479	char *
	480	generate_random_salt(char *salt, int length)
	481	{
	482	char *buf;
	483	int fd, i;
	484	if((fd = open("/dev/random", O_RDONLY)) < 0)
	485	{
	486	return (generate_poor_salt(salt, length));
	487	}
	488	buf = calloc(1, length);
	489	if(read(fd, buf, length) != length)
	490	{
	491	free(buf);
	492	return (generate_poor_salt(salt, length));
	493	}
	494
	495	for(i = 0; i < length; i++)
	496	{
	497	salt[i] = saltChars[abs(buf[i]) % 64];
	498	}
	499	free(buf);
	500	return (salt);
212380e3 AC	501	}
212380e3 AC	502
f1d07f6b JT	503	void
f1d07f6b JT	504	full_usage()
212380e3	505	{
f1d07f6b JT	506	printf("mkpasswd [-m\|-d\|-b\|-e] [-l saltlength] [-r rounds] [-s salt] [-p plaintext]\n");
	507	printf("-x Generate a SHA256 password\n");
	508	printf("-y Generate a SHA512 password\n");
	509	printf("-m Generate an MD5 password\n");
	510	printf("-d Generate a DES password\n");
69b2e745	511	printf("-b Generate a Blowfish password\n");
f1d07f6b	512	printf("-e Generate an Extended DES password\n");
69b2e745 LS	513	printf("-l Specify a length for a random MD5 or Blowfish salt\n");
	514	printf("-r Specify a number of rounds for a Blowfish or Extended DES password\n");
	515	printf(" Blowfish: default 4, no more than 6 recommended\n");
f1d07f6b JT	516	printf(" Extended DES: default 25\n");
f1d07f6b JT	517	printf("-s Specify a salt, 2 alphanumeric characters for DES, up to 16 for MD5,\n");
69b2e745	518	printf(" up to 22 for Blowfish, and 4 for Extended DES\n");
f1d07f6b JT	519	printf("-p Specify a plaintext password to use\n");
	520	printf("Example: mkpasswd -m -s 3dr -p test\n");
	521	exit(0);
212380e3 AC	522	}
212380e3 AC	523
f1d07f6b JT	524	void
f1d07f6b JT	525	brief_usage()
212380e3	526	{
f1d07f6b JT	527	printf("mkpasswd - password hash generator\n");
	528	printf("Standard DES: mkpasswd [-d] [-s salt] [-p plaintext]\n");
	529	printf("Extended DES: mkpasswd -e [-r rounds] [-s salt] [-p plaintext]\n");
	530	printf(" MD5: mkpasswd -m [-l saltlength] [-s salt] [-p plaintext]\n");
69b2e745	531	printf(" Blowfish: mkpasswd -b [-r rounds] [-l saltlength] [-s salt]\n");
f1d07f6b JT	532	printf(" [-p plaintext]\n");
	533	printf("Use -h for full usage\n");
	534	exit(0);
212380e3	535	}