1 /* apps/passwd.c */

     2 

     3 #if defined OPENSSL_NO_MD5 || defined CHARSET_EBCDIC

     4 # define NO_MD5CRYPT_1

     5 #endif

     6 

     7 #if !defined(OPENSSL_NO_DES) || !defined(NO_MD5CRYPT_1)

     8 

     9 #include <assert.h>

    10 #include <string.h>

    11 

    12 #include "apps.h"

    13 

    14 #include <openssl/bio.h>

    15 #include <openssl/err.h>

    16 #include <openssl/evp.h>

    17 #include <openssl/rand.h>

    18 #ifndef OPENSSL_NO_DES

    19 # include <openssl/des.h>

    20 #endif

    21 #ifndef NO_MD5CRYPT_1

    22 # include <openssl/md5.h>

    23 #endif

    24 

    25 

    26 #undef PROG

    27 #define PROG passwd_main

    28 

    29 

    30 static unsigned const char cov_2char[64]={

    31 	/* from crypto/des/fcrypt.c */

    32 	0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,

    33 	0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,

    34 	0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,

    35 	0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,

    36 	0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,

    37 	0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,

    38 	0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,

    39 	0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A

    40 };

    41 

    42 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,

    43 	char *passwd, BIO *out, int quiet, int table, int reverse,

    44 	size_t pw_maxlen, int usecrypt, int use1, int useapr1);

    45 

    46 /* -crypt        - standard Unix password algorithm (default)

    47  * -1            - MD5-based password algorithm

    48  * -apr1         - MD5-based password algorithm, Apache variant

    49  * -salt string  - salt

    50  * -in file      - read passwords from file

    51  * -stdin        - read passwords from stdin

    52  * -noverify     - never verify when reading password from terminal

    53  * -quiet        - no warnings

    54  * -table        - format output as table

    55  * -reverse      - switch table columns

    56  */

    57 

    58 

    59 int MAIN(int, char **);

    60 

    61 int MAIN(int argc, char **argv)

    62 	{

    63 	int ret = 1;

    64 	char *infile = NULL;

    65 	int in_stdin = 0;

    66 	int in_noverify = 0;

    67 	char *salt = NULL, *passwd = NULL, **passwds = NULL;

    68 	char *salt_malloc = NULL, *passwd_malloc = NULL;

    69 	size_t passwd_malloc_size = 0;

    70 	int pw_source_defined = 0;

    71 	BIO *in = NULL, *out = NULL;

    72 	int i, badopt, opt_done;

    73 	int passed_salt = 0, quiet = 0, table = 0, reverse = 0;

    74 	int usecrypt = 0, use1 = 0, useapr1 = 0;

    75 	size_t pw_maxlen = 0;

    76 

    77 	apps_startup();

    78 

    79 	if (bio_err == NULL)

    80 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)

    81 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

    82 

    83 

    84 	if (!load_config(bio_err, NULL))

    85 		goto err;

    86 	out = BIO_new(BIO_s_file());

    87 	if (out == NULL)

    88 		goto err;

    89 	BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);

    90 #ifdef OPENSSL_SYS_VMS

    91 	{

    92 	BIO *tmpbio = BIO_new(BIO_f_linebuffer());

    93 	out = BIO_push(tmpbio, out);

    94 	}

    95 #endif

    96 

    97 	badopt = 0, opt_done = 0;

    98 	i = 0;

    99 	while (!badopt && !opt_done && argv[++i] != NULL)

   100 		{

   101 		if (strcmp(argv[i], "-crypt") == 0)

   102 			usecrypt = 1;

   103 		else if (strcmp(argv[i], "-1") == 0)

   104 			use1 = 1;

   105 		else if (strcmp(argv[i], "-apr1") == 0)

   106 			useapr1 = 1;

   107 		else if (strcmp(argv[i], "-salt") == 0)

   108 			{

   109 			if ((argv[i+1] != NULL) && (salt == NULL))

   110 				{

   111 				passed_salt = 1;

   112 				salt = argv[++i];

   113 				}

   114 			else

   115 				badopt = 1;

   116 			}

   117 		else if (strcmp(argv[i], "-in") == 0)

   118 			{

   119 			if ((argv[i+1] != NULL) && !pw_source_defined)

   120 				{

   121 				pw_source_defined = 1;

   122 				infile = argv[++i];

   123 				}

   124 			else

   125 				badopt = 1;

   126 			}

   127 		else if (strcmp(argv[i], "-stdin") == 0)

   128 			{

   129 			if (!pw_source_defined)

   130 				{

   131 				pw_source_defined = 1;

   132 				in_stdin = 1;

   133 				}

   134 			else

   135 				badopt = 1;

   136 			}

   137 		else if (strcmp(argv[i], "-noverify") == 0)

   138 			in_noverify = 1;

   139 		else if (strcmp(argv[i], "-quiet") == 0)

   140 			quiet = 1;

   141 		else if (strcmp(argv[i], "-table") == 0)

   142 			table = 1;

   143 		else if (strcmp(argv[i], "-reverse") == 0)

   144 			reverse = 1;

   145 		else if (argv[i][0] == '-')

   146 			badopt = 1;

   147 		else if (!pw_source_defined)

   148 			/* non-option arguments, use as passwords */

   149 			{

   150 			pw_source_defined = 1;

   151 			passwds = &argv[i];

   152 			opt_done = 1;

   153 			}

   154 		else

   155 			badopt = 1;

   156 		}

   157 

   158 	if (!usecrypt && !use1 && !useapr1) /* use default */

   159 		usecrypt = 1;

   160 	if (usecrypt + use1 + useapr1 > 1) /* conflict */

   161 		badopt = 1;

   162 

   163 	/* reject unsupported algorithms */

   164 #ifdef OPENSSL_NO_DES

   165 	if (usecrypt) badopt = 1;

   166 #endif

   167 #ifdef NO_MD5CRYPT_1

   168 	if (use1 || useapr1) badopt = 1;

   169 #endif

   170 

   171 	if (badopt) 

   172 		{

   173 		BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");

   174 		BIO_printf(bio_err, "where options are\n");

   175 #ifndef OPENSSL_NO_DES

   176 		BIO_printf(bio_err, "-crypt             standard Unix password algorithm (default)\n");

   177 #endif

   178 #ifndef NO_MD5CRYPT_1

   179 		BIO_printf(bio_err, "-1                 MD5-based password algorithm\n");

   180 		BIO_printf(bio_err, "-apr1              MD5-based password algorithm, Apache variant\n");

   181 #endif

   182 		BIO_printf(bio_err, "-salt string       use provided salt\n");

   183 		BIO_printf(bio_err, "-in file           read passwords from file\n");

   184 		BIO_printf(bio_err, "-stdin             read passwords from stdin\n");

   185 		BIO_printf(bio_err, "-noverify          never verify when reading password from terminal\n");

   186 		BIO_printf(bio_err, "-quiet             no warnings\n");

   187 		BIO_printf(bio_err, "-table             format output as table\n");

   188 		BIO_printf(bio_err, "-reverse           switch table columns\n");

   189 		

   190 		goto err;

   191 		}

   192 

   193 	if ((infile != NULL) || in_stdin)

   194 		{

   195 		in = BIO_new(BIO_s_file());

   196 		if (in == NULL)

   197 			goto err;

   198 		if (infile != NULL)

   199 			{

   200 			assert(in_stdin == 0);

   201 			if (BIO_read_filename(in, infile) <= 0)

   202 				goto err;

   203 			}

   204 		else

   205 			{

   206 			assert(in_stdin);

   207 			BIO_set_fp(in, stdin, BIO_NOCLOSE);

   208 			

   209 			}

   210 		}

   211 	

   212 	if (usecrypt)

   213 		pw_maxlen = 8;

   214 	else if (use1 || useapr1)

   215 		pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */

   216 

   217 	if (passwds == NULL)

   218 		{

   219 		/* no passwords on the command line */

   220 

   221 		passwd_malloc_size = pw_maxlen + 2;

   222 		/* longer than necessary so that we can warn about truncation */

   223 		passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size);

   224 		if (passwd_malloc == NULL)

   225 			goto err;

   226 		}

   227 

   228 	if ((in == NULL) && (passwds == NULL))

   229 		{

   230 		/* build a null-terminated list */

   231 		static char *passwds_static[2] = {NULL, NULL};

   232 		

   233 		passwds = passwds_static;

   234 		if (in == NULL)

   235 			if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", !(passed_salt || in_noverify)) != 0)

   236 				goto err;

   237 		passwds[0] = passwd_malloc;

   238 		}

   239 

   240 	if (in == NULL)

   241 		{

   242 		assert(passwds != NULL);

   243 		assert(*passwds != NULL);

   244 		

   245 		do /* loop over list of passwords */

   246 			{

   247 			passwd = *passwds++;

   248 			if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,

   249 				quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))

   250 				goto err;

   251 			}

   252 		while (*passwds != NULL);

   253 		}

   254 	else

   255 		/* in != NULL */

   256 		{

   257 		int done;

   258 

   259 		assert (passwd != NULL);

   260 		do

   261 			{

   262 			int r = BIO_gets(in, passwd, pw_maxlen + 1);

   263 			if (r > 0)

   264 				{

   265 				char *c = (strchr(passwd, '\n')) ;

   266 				if (c != NULL)

   267 					*c = 0; /* truncate at newline */

   268 				else

   269 					{

   270 					/* ignore rest of line */

   271 					char trash[BUFSIZ];

   272 					do

   273 						r = BIO_gets(in, trash, sizeof trash);

   274 					while ((r > 0) && (!strchr(trash, '\n')));

   275 					}

   276 				

   277 				if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,

   278 					quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))

   279 					goto err;

   280 				}

   281 			done = (r <= 0);

   282 			}

   283 		while (!done);

   284 		}

   285 	ret = 0;

   286 

   287 err:

   288 	ERR_print_errors(bio_err);

   289 	if (salt_malloc)

   290 		OPENSSL_free(salt_malloc);

   291 	if (passwd_malloc)

   292 		OPENSSL_free(passwd_malloc);

   293 	if (in)

   294 		BIO_free(in);

   295 	if (out)

   296 		BIO_free_all(out);

   297 	apps_shutdown();

   298 	OPENSSL_EXIT(ret);

   299 	}

   300 

   301 

   302 #ifndef NO_MD5CRYPT_1

   303 /* MD5-based password algorithm (should probably be available as a library

   304  * function; then the static buffer would not be acceptable).

   305  * For magic string "1", this should be compatible to the MD5-based BSD

   306  * password algorithm.

   307  * For 'magic' string "apr1", this is compatible to the MD5-based Apache

   308  * password algorithm.

   309  * (Apparently, the Apache password algorithm is identical except that the

   310  * 'magic' string was changed -- the laziest application of the NIH principle

   311  * I've ever encountered.)

   312  */

   313 static char *md5crypt(const char *passwd, const char *magic, const char *salt)

   314 	{

   315 	static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */

   316 	unsigned char buf[MD5_DIGEST_LENGTH];

   317 	char *salt_out;

   318 	int n;

   319 	unsigned int i;

   320 	EVP_MD_CTX md,md2;

   321 	size_t passwd_len, salt_len;

   322 

   323 	passwd_len = strlen(passwd);

   324 	out_buf[0] = '$';

   325 	out_buf[1] = 0;

   326 	assert(strlen(magic) <= 4); /* "1" or "apr1" */

   327 	strncat(out_buf, magic, 4);

   328 	strncat(out_buf, "$", 1);

   329 	strncat(out_buf, salt, 8);

   330 	assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */

   331 	salt_out = out_buf + 2 + strlen(magic);

   332 	salt_len = strlen(salt_out);

   333 	assert(salt_len <= 8);

   334 	

   335 	EVP_MD_CTX_init(&md);

   336 	EVP_DigestInit_ex(&md,EVP_md5(), NULL);

   337 	EVP_DigestUpdate(&md, passwd, passwd_len);

   338 	EVP_DigestUpdate(&md, "$", 1);

   339 	EVP_DigestUpdate(&md, magic, strlen(magic));

   340 	EVP_DigestUpdate(&md, "$", 1);

   341 	EVP_DigestUpdate(&md, salt_out, salt_len);

   342 	

   343 	EVP_MD_CTX_init(&md2);

   344 	EVP_DigestInit_ex(&md2,EVP_md5(), NULL);

   345 	EVP_DigestUpdate(&md2, passwd, passwd_len);

   346 	EVP_DigestUpdate(&md2, salt_out, salt_len);

   347 	EVP_DigestUpdate(&md2, passwd, passwd_len);

   348 	EVP_DigestFinal_ex(&md2, buf, NULL);

   349 

   350 	for (i = passwd_len; i > sizeof buf; i -= sizeof buf)

   351 		EVP_DigestUpdate(&md, buf, sizeof buf);

   352 	EVP_DigestUpdate(&md, buf, i);

   353 	

   354 	n = passwd_len;

   355 	while (n)

   356 		{

   357 		EVP_DigestUpdate(&md, (n & 1) ? "\0" : passwd, 1);

   358 		n >>= 1;

   359 		}

   360 	EVP_DigestFinal_ex(&md, buf, NULL);

   361 

   362 	for (i = 0; i < 1000; i++)

   363 		{

   364 		EVP_DigestInit_ex(&md2,EVP_md5(), NULL);

   365 		EVP_DigestUpdate(&md2, (i & 1) ? (unsigned const char *) passwd : buf,

   366 		                       (i & 1) ? passwd_len : sizeof buf);

   367 		if (i % 3)

   368 			EVP_DigestUpdate(&md2, salt_out, salt_len);

   369 		if (i % 7)

   370 			EVP_DigestUpdate(&md2, passwd, passwd_len);

   371 		EVP_DigestUpdate(&md2, (i & 1) ? buf : (unsigned const char *) passwd,

   372 		                       (i & 1) ? sizeof buf : passwd_len);

   373 		EVP_DigestFinal_ex(&md2, buf, NULL);

   374 		}

   375 	EVP_MD_CTX_cleanup(&md2);

   376 	

   377 	 {

   378 		/* transform buf into output string */

   379 	

   380 		unsigned char buf_perm[sizeof buf];

   381 		int dest, source;

   382 		char *output;

   383 

   384 		/* silly output permutation */

   385 		for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)

   386 			buf_perm[dest] = buf[source];

   387 		buf_perm[14] = buf[5];

   388 		buf_perm[15] = buf[11];

   389 #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */

   390 		assert(16 == sizeof buf_perm);

   391 #endif

   392 		

   393 		output = salt_out + salt_len;

   394 		assert(output == out_buf + strlen(out_buf));

   395 		

   396 		*output++ = '$';

   397 

   398 		for (i = 0; i < 15; i += 3)

   399 			{

   400 			*output++ = cov_2char[buf_perm[i+2] & 0x3f];

   401 			*output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) |

   402 				                  (buf_perm[i+2] >> 6)];

   403 			*output++ = cov_2char[((buf_perm[i] & 3) << 4) |

   404 				                  (buf_perm[i+1] >> 4)];

   405 			*output++ = cov_2char[buf_perm[i] >> 2];

   406 			}

   407 		assert(i == 15);

   408 		*output++ = cov_2char[buf_perm[i] & 0x3f];

   409 		*output++ = cov_2char[buf_perm[i] >> 6];

   410 		*output = 0;

   411 		assert(strlen(out_buf) < sizeof(out_buf));

   412 	 }

   413 	EVP_MD_CTX_cleanup(&md);

   414 

   415 	return out_buf;

   416 	}

   417 #endif

   418 

   419 

   420 static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,

   421 	char *passwd, BIO *out,	int quiet, int table, int reverse,

   422 	size_t pw_maxlen, int usecrypt, int use1, int useapr1)

   423 	{

   424 	char *hash = NULL;

   425 

   426 	assert(salt_p != NULL);

   427 	assert(salt_malloc_p != NULL);

   428 

   429 	/* first make sure we have a salt */

   430 	if (!passed_salt)

   431 		{

   432 #ifndef OPENSSL_NO_DES

   433 		if (usecrypt)

   434 			{

   435 			if (*salt_malloc_p == NULL)

   436 				{

   437 				*salt_p = *salt_malloc_p = OPENSSL_malloc(3);

   438 				if (*salt_malloc_p == NULL)

   439 					goto err;

   440 				}

   441 			if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0)

   442 				goto err;

   443 			(*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */

   444 			(*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */

   445 			(*salt_p)[2] = 0;

   446 #ifdef CHARSET_EBCDIC

   447 			ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert

   448 			                                    * back to ASCII */

   449 #endif

   450 			}

   451 #endif /* !OPENSSL_NO_DES */

   452 

   453 #ifndef NO_MD5CRYPT_1

   454 		if (use1 || useapr1)

   455 			{

   456 			int i;

   457 			

   458 			if (*salt_malloc_p == NULL)

   459 				{

   460 				*salt_p = *salt_malloc_p = OPENSSL_malloc(9);

   461 				if (*salt_malloc_p == NULL)

   462 					goto err;

   463 				}

   464 			if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0)

   465 				goto err;

   466 			

   467 			for (i = 0; i < 8; i++)

   468 				(*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */

   469 			(*salt_p)[8] = 0;

   470 			}

   471 #endif /* !NO_MD5CRYPT_1 */

   472 		}

   473 	

   474 	assert(*salt_p != NULL);

   475 	

   476 	/* truncate password if necessary */

   477 	if ((strlen(passwd) > pw_maxlen))

   478 		{

   479 		if (!quiet)

   480 			/* XXX: really we should know how to print a size_t, not cast it */

   481 			BIO_printf(bio_err, "Warning: truncating password to %u characters\n", (unsigned)pw_maxlen);

   482 		passwd[pw_maxlen] = 0;

   483 		}

   484 	assert(strlen(passwd) <= pw_maxlen);

   485 	

   486 	/* now compute password hash */

   487 #ifndef OPENSSL_NO_DES

   488 	if (usecrypt)

   489 		hash = DES_crypt(passwd, *salt_p);

   490 #endif

   491 #ifndef NO_MD5CRYPT_1

   492 	if (use1 || useapr1)

   493 		hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);

   494 #endif

   495 	assert(hash != NULL);

   496 

   497 	if (table && !reverse)

   498 		BIO_printf(out, "%s\t%s\n", passwd, hash);

   499 	else if (table && reverse)

   500 		BIO_printf(out, "%s\t%s\n", hash, passwd);

   501 	else

   502 		BIO_printf(out, "%s\n", hash);

   503 	return 1;

   504 	

   505 err:

   506 	return 0;

   507 	}

   508 #else

   509 

   510 int MAIN(int argc, char **argv)

   511 	{

   512 	fputs("Program not available.\n", stderr)

   513 	OPENSSL_EXIT(1);

   514 	}

   515 #endif