[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 "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 */

#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 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	**
212380e3 AC	12	*/
	13	#include <stdio.h>
	14	#include <string.h>
	15	#include <stdlib.h>
	16	#include <time.h>
	17	#include <unistd.h>
	18	#include <fcntl.h>
f1d07f6b JT	19	#include "ratbox_lib.h"
	20	#ifndef __MINGW32__
	21	#include <pwd.h>
	22	#endif
212380e3	23
f1d07f6b JT	24	#define FLAG_MD5 0x00000001
	25	#define FLAG_DES 0x00000002
	26	#define FLAG_SALT 0x00000004
	27	#define FLAG_PASS 0x00000008
	28	#define FLAG_LENGTH 0x00000010
212380e3	29	#define FLAG_BLOWFISH 0x00000020
f1d07f6b JT	30	#define FLAG_ROUNDS 0x00000040
	31	#define FLAG_EXT 0x00000080
	32	#define FLAG_SHA256 0x00000100
	33	#define FLAG_SHA512 0x00000200
212380e3	34
212380e3 AC	35
	36	static char *make_des_salt(void);
	37	static char *make_ext_salt(int);
	38	static char make_ext_salt_para(int, char );
	39	static char *make_md5_salt(int);
	40	static char make_md5_salt_para(char );
f1d07f6b JT	41	static char *make_sha256_salt(int);
	42	static char make_sha256_salt_para(char );
	43	static char *make_sha512_salt(int);
	44	static char make_sha512_salt_para(char );
212380e3 AC	45	static char *make_bf_salt(int, int);
	46	static char make_bf_salt_para(int, char );
	47	static char *int_to_base64(int);
	48	static char generate_random_salt(char , int);
	49	static char generate_poor_salt(char , int);
	50
	51	static void full_usage(void);
	52	static void brief_usage(void);
	53
f1d07f6b	54	static char saltChars[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
212380e3 AC	55	/* 0 .. 63, ascii - 64 */
212380e3 AC	56
f1d07f6b JT	57	#ifdef __MINGW32__
	58	#include <conio.h>
	59	#ifdef PASS_MAX
	60	#undef PASS_MAX
	61	#endif
	62	#define PASS_MAX 256
	63	static char getpassbuf[PASS_MAX + 1];
	64
	65	static char *
	66	getpass(const char *prompt)
212380e3	67	{
f1d07f6b JT	68	int c;
	69	int i = 0;
	70
29c92cf9	71	memset(getpassbuf, 0, sizeof(getpassbuf));
f1d07f6b JT	72	fputs(prompt, stderr);
	73	for(;;)
	74	{
	75	c = _getch();
	76	if(c == '\r')
	77	{
	78	getpassbuf[i] = '\0';
	79	break;
	80	}
	81	else if(i < PASS_MAX)
	82	{
	83	getpassbuf[i++] = c;
	84	}
	85	}
	86	fputs("\r\n", stderr);
	87
	88	return getpassbuf;
212380e3	89	}
f1d07f6b JT	90	#endif
f1d07f6b JT	91
212380e3	92
f1d07f6b JT	93	int
f1d07f6b JT	94	main(int argc, char *argv[])
212380e3	95	{
f1d07f6b JT	96	char *plaintext = NULL;
	97	int c;
	98	char *saltpara = NULL;
	99	char *salt;
011e38be	100	char *hashed;
f1d07f6b JT	101	int flag = 0;
	102	int length = 0; /* Not Set */
	103	int rounds = 0; /* Not set, since extended DES needs 25 and blowfish needs
	104	** 4 by default, a side effect of this being the encryption
	105	** type parameter must be specified before the rounds
	106	** parameter.
	107	*/
	108
	109	while((c = getopt(argc, argv, "xymdber:h?l:s:p:")) != -1)
	110	{
	111	switch (c)
	112	{
	113	case 'm':
	114	flag \|= FLAG_MD5;
	115	break;
	116	case 'd':
	117	flag \|= FLAG_DES;
	118	break;
	119	case 'b':
	120	flag \|= FLAG_BLOWFISH;
	121	rounds = 4;
	122	break;
	123	case 'e':
	124	flag \|= FLAG_EXT;
	125	rounds = 25;
	126	break;
	127	case 'l':
	128	flag \|= FLAG_LENGTH;
	129	length = atoi(optarg);
	130	break;
	131	case 'r':
	132	flag \|= FLAG_ROUNDS;
	133	rounds = atoi(optarg);
	134	break;
	135	case 's':
	136	flag \|= FLAG_SALT;
	137	saltpara = optarg;
	138	break;
	139	case 'p':
	140	flag \|= FLAG_PASS;
	141	plaintext = optarg;
	142	break;
	143	case 'x':
	144	flag \|= FLAG_SHA256;
	145	break;
	146	case 'y':
	147	flag \|= FLAG_SHA512;
	148	break;
	149	case 'h':
	150	full_usage();
	151	/* NOT REACHED */
	152	break;
	153	case '?':
	154	brief_usage();
	155	/* NOT REACHED */
	156	break;
	157	default:
	158	printf("Invalid Option: -%c\n", c);
	159	break;
	160	}
	161	}
	162
7600b65f EM	163	if(flag & FLAG_MD5)
	164	{
	165	if(length == 0)
	166	length = 8;
	167	if(flag & FLAG_SALT)
	168	salt = make_md5_salt_para(saltpara);
	169	else
	170	salt = make_md5_salt(length);
	171	}
	172	else if(flag & FLAG_BLOWFISH)
f1d07f6b JT	173	{
	174	if(length == 0)
	175	length = 22;
	176	if(flag & FLAG_SALT)
	177	salt = make_bf_salt_para(rounds, saltpara);
	178	else
	179	salt = make_bf_salt(rounds, length);
	180	}
	181	else if(flag & FLAG_SHA256)
	182	{
	183	if(length == 0)
	184	length = 16;
	185	if(flag & FLAG_SALT)
	186	salt = make_sha256_salt_para(saltpara);
	187	else
	188	salt = make_sha256_salt(length);
	189	}
f1d07f6b JT	190	else if(flag & FLAG_EXT)
	191	{
	192	/* XXX - rounds needs to be done */
	193	if(flag & FLAG_SALT)
	194	{
	195	if((strlen(saltpara) == 4))
	196	{
	197	salt = make_ext_salt_para(rounds, saltpara);
	198	}
	199	else
	200	{
	201	printf("Invalid salt, please enter 4 alphanumeric characters\n");
	202	exit(1);
	203	}
	204	}
	205	else
	206	{
	207	salt = make_ext_salt(rounds);
	208	}
	209	}
920cb1dc	210	else if (flag & FLAG_DES)
f1d07f6b JT	211	{
	212	if(flag & FLAG_SALT)
	213	{
	214	if((strlen(saltpara) == 2))
	215	{
	216	salt = saltpara;
	217	}
	218	else
	219	{
	220	printf("Invalid salt, please enter 2 alphanumeric characters\n");
	221	exit(1);
	222	}
	223	}
	224	else
	225	{
	226	salt = make_des_salt();
	227	}
	228	}
920cb1dc AC	229	else
	230	{
	231	if(length == 0)
7600b65f	232	length = 16;
920cb1dc	233	if(flag & FLAG_SALT)
7600b65f	234	salt = make_sha512_salt_para(saltpara);
920cb1dc	235	else
7600b65f	236	salt = make_sha512_salt(length);
920cb1dc	237	}
f1d07f6b JT	238
	239	if(flag & FLAG_PASS)
	240	{
	241	if(!plaintext)
011e38be AI	242	{
	243	fprintf(stderr, "Please enter a valid password\n");
	244	return 1;
	245	}
	246
	247	hashed = rb_crypt(plaintext, salt);
f1d07f6b JT	248	}
	249	else
	250	{
011e38be AI	251	hashed = strdup(rb_crypt(getpass("plaintext: "), salt));
	252	plaintext = getpass("again: ");
	253
	254	if (strcmp(rb_crypt(plaintext, salt), hashed) != 0)
	255	{
	256	fprintf(stderr, "Passwords do not match\n");
	257	return 1;
	258	}
f1d07f6b JT	259	}
f1d07f6b JT	260
011e38be	261	printf("%s\n", hashed);
f1d07f6b	262	return 0;
212380e3 AC	263	}
212380e3 AC	264
f1d07f6b JT	265	static char *
f1d07f6b JT	266	make_des_salt()
212380e3	267	{
f1d07f6b JT	268	static char salt[3];
	269	generate_random_salt(salt, 2);
	270	salt[2] = '\0';
	271	return salt;
212380e3 AC	272	}
212380e3 AC	273
f1d07f6b JT	274	char *
f1d07f6b JT	275	int_to_base64(int value)
212380e3	276	{
f1d07f6b JT	277	static char buf[5];
f1d07f6b JT	278	int i;
212380e3	279
f1d07f6b JT	280	for(i = 0; i < 4; i++)
	281	{
	282	buf[i] = saltChars[value & 63];
	283	value >>= 6; /* Right shifting 6 places is the same as dividing by 64 */
	284	}
	285
	286	buf[i] = '\0'; /* not REALLY needed as it's static, and thus initialized
	287	** to \0.
	288	*/
	289	return buf;
212380e3 AC	290	}
212380e3 AC	291
f1d07f6b JT	292	char *
f1d07f6b JT	293	make_ext_salt(int rounds)
212380e3	294	{
f1d07f6b	295	static char salt[10];
212380e3	296
f1d07f6b JT	297	sprintf(salt, "_%s", int_to_base64(rounds));
	298	generate_random_salt(&salt[5], 4);
	299	salt[9] = '\0';
	300	return salt;
212380e3 AC	301	}
212380e3 AC	302
f1d07f6b JT	303	char *
f1d07f6b JT	304	make_ext_salt_para(int rounds, char *saltpara)
212380e3	305	{
f1d07f6b JT	306	static char salt[10];
	307
	308	sprintf(salt, "_%s%s", int_to_base64(rounds), saltpara);
	309	return salt;
212380e3	310	}
f1d07f6b JT	311
	312	char *
	313	make_md5_salt_para(char *saltpara)
212380e3	314	{
f1d07f6b JT	315	static char salt[21];
	316	if(saltpara && (strlen(saltpara) <= 16))
	317	{
	318	/* sprintf used because of portability requirements, the length
	319	** is checked above, so it should not be too much of a concern
	320	*/
	321	sprintf(salt, "$1$%s$", saltpara);
	322	return salt;
	323	}
	324	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	325	exit(1);
	326
	327	/* NOT REACHED */
	328	return NULL;
212380e3 AC	329	}
212380e3 AC	330
f1d07f6b JT	331	char *
f1d07f6b JT	332	make_md5_salt(int length)
212380e3	333	{
f1d07f6b JT	334	static char salt[21];
	335	if(length > 16)
	336	{
	337	printf("MD5 salt length too long\n");
	338	exit(0);
	339	}
	340	salt[0] = '$';
	341	salt[1] = '1';
	342	salt[2] = '$';
	343	generate_random_salt(&salt[3], length);
	344	salt[length + 3] = '$';
	345	salt[length + 4] = '\0';
	346	return salt;
212380e3 AC	347	}
212380e3 AC	348
f1d07f6b JT	349	char *
f1d07f6b JT	350	make_sha256_salt_para(char *saltpara)
212380e3	351	{
f1d07f6b JT	352	static char salt[21];
	353	if(saltpara && (strlen(saltpara) <= 16))
	354	{
	355	/* sprintf used because of portability requirements, the length
	356	** is checked above, so it should not be too much of a concern
	357	*/
	358	sprintf(salt, "$5$%s$", saltpara);
	359	return salt;
	360	}
	361	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	362	exit(1);
	363
	364	/* NOT REACHED */
	365	return NULL;
212380e3 AC	366	}
212380e3 AC	367
f1d07f6b JT	368	char *
f1d07f6b JT	369	make_sha512_salt_para(char *saltpara)
212380e3	370	{
f1d07f6b JT	371	static char salt[21];
	372	if(saltpara && (strlen(saltpara) <= 16))
	373	{
	374	/* sprintf used because of portability requirements, the length
	375	** is checked above, so it should not be too much of a concern
	376	*/
	377	sprintf(salt, "$6$%s$", saltpara);
	378	return salt;
	379	}
	380	printf("Invalid Salt, please use up to 16 random alphanumeric characters\n");
	381	exit(1);
	382
	383	/* NOT REACHED */
	384	return NULL;
212380e3 AC	385	}
212380e3 AC	386
f1d07f6b JT	387
	388	char *
	389	make_sha256_salt(int length)
212380e3	390	{
f1d07f6b JT	391	static char salt[21];
	392	if(length > 16)
	393	{
	394	printf("SHA256 salt length too long\n");
	395	exit(0);
	396	}
	397	salt[0] = '$';
	398	salt[1] = '5';
	399	salt[2] = '$';
	400	generate_random_salt(&salt[3], length);
	401	salt[length + 3] = '$';
	402	salt[length + 4] = '\0';
	403	return salt;
	404	}
	405
	406	char *
	407	make_sha512_salt(int length)
	408	{
	409	static char salt[21];
	410	if(length > 16)
	411	{
	412	printf("SHA512 salt length too long\n");
	413	exit(0);
	414	}
	415	salt[0] = '$';
	416	salt[1] = '6';
	417	salt[2] = '$';
	418	generate_random_salt(&salt[3], length);
	419	salt[length + 3] = '$';
	420	salt[length + 4] = '\0';
	421	return salt;
	422	}
	423
	424	char *
	425	make_bf_salt_para(int rounds, char *saltpara)
	426	{
	427	static char salt[31];
	428	char tbuf[3];
	429	if(saltpara && (strlen(saltpara) <= 22))
	430	{
	431	/* sprintf used because of portability requirements, the length
	432	** is checked above, so it should not be too much of a concern
	433	*/
	434	sprintf(tbuf, "%02d", rounds);
	435	sprintf(salt, "$2a$%s$%s$", tbuf, saltpara);
	436	return salt;
	437	}
	438	printf("Invalid Salt, please use up to 22 random alphanumeric characters\n");
	439	exit(1);
	440
	441	/* NOT REACHED */
	442	return NULL;
	443	}
	444
	445	char *
	446	make_bf_salt(int rounds, int length)
	447	{
	448	static char salt[31];
	449	char tbuf[3];
	450	if(length > 22)
	451	{
69b2e745	452	printf("Blowfish salt length too long\n");
f1d07f6b JT	453	exit(0);
	454	}
	455	sprintf(tbuf, "%02d", rounds);
	456	sprintf(salt, "$2a$%s$", tbuf);
	457	generate_random_salt(&salt[7], length);
	458	salt[length + 7] = '$';
	459	salt[length + 8] = '\0';
	460	return salt;
	461	}
	462
	463	char *
	464	generate_poor_salt(char *salt, int length)
	465	{
	466	int i;
	467	srand(time(NULL));
	468	for(i = 0; i < length; i++)
	469	{
	470	salt[i] = saltChars[rand() % 64];
	471	}
	472	return (salt);
	473	}
	474
	475	char *
	476	generate_random_salt(char *salt, int length)
	477	{
	478	char *buf;
	479	int fd, i;
	480	if((fd = open("/dev/random", O_RDONLY)) < 0)
	481	{
	482	return (generate_poor_salt(salt, length));
	483	}
	484	buf = calloc(1, length);
	485	if(read(fd, buf, length) != length)
	486	{
	487	free(buf);
	488	return (generate_poor_salt(salt, length));
	489	}
	490
	491	for(i = 0; i < length; i++)
	492	{
	493	salt[i] = saltChars[abs(buf[i]) % 64];
	494	}
	495	free(buf);
	496	return (salt);
212380e3 AC	497	}
212380e3 AC	498
f1d07f6b JT	499	void
f1d07f6b JT	500	full_usage()
212380e3	501	{
f1d07f6b JT	502	printf("mkpasswd [-m\|-d\|-b\|-e] [-l saltlength] [-r rounds] [-s salt] [-p plaintext]\n");
	503	printf("-x Generate a SHA256 password\n");
	504	printf("-y Generate a SHA512 password\n");
	505	printf("-m Generate an MD5 password\n");
	506	printf("-d Generate a DES password\n");
69b2e745	507	printf("-b Generate a Blowfish password\n");
f1d07f6b	508	printf("-e Generate an Extended DES password\n");
69b2e745 LS	509	printf("-l Specify a length for a random MD5 or Blowfish salt\n");
	510	printf("-r Specify a number of rounds for a Blowfish or Extended DES password\n");
	511	printf(" Blowfish: default 4, no more than 6 recommended\n");
f1d07f6b JT	512	printf(" Extended DES: default 25\n");
f1d07f6b JT	513	printf("-s Specify a salt, 2 alphanumeric characters for DES, up to 16 for MD5,\n");
69b2e745	514	printf(" up to 22 for Blowfish, and 4 for Extended DES\n");
f1d07f6b JT	515	printf("-p Specify a plaintext password to use\n");
	516	printf("Example: mkpasswd -m -s 3dr -p test\n");
	517	exit(0);
212380e3 AC	518	}
212380e3 AC	519
f1d07f6b JT	520	void
f1d07f6b JT	521	brief_usage()
212380e3	522	{
f1d07f6b JT	523	printf("mkpasswd - password hash generator\n");
	524	printf("Standard DES: mkpasswd [-d] [-s salt] [-p plaintext]\n");
	525	printf("Extended DES: mkpasswd -e [-r rounds] [-s salt] [-p plaintext]\n");
	526	printf(" MD5: mkpasswd -m [-l saltlength] [-s salt] [-p plaintext]\n");
69b2e745	527	printf(" Blowfish: mkpasswd -b [-r rounds] [-l saltlength] [-s salt]\n");
f1d07f6b JT	528	printf(" [-p plaintext]\n");
	529	printf("Use -h for full usage\n");
	530	exit(0);
212380e3	531	}