GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/openssl/passwd.c Lines: 166 200 83.0 %
Date: 2017-11-13 Branches: 80 142 56.3 %

Line Branch Exec Source
1
/* $OpenBSD: passwd.c,v 1.8 2017/01/20 08:57:12 deraadt Exp $ */
2
3
#if defined OPENSSL_NO_MD5
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
18
#ifndef OPENSSL_NO_DES
19
#include <openssl/des.h>
20
#endif
21
22
#ifndef NO_MD5CRYPT_1
23
#include <openssl/md5.h>
24
#endif
25
26
static unsigned const char cov_2char[64] = {
27
	/* from crypto/des/fcrypt.c */
28
	0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
29
	0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
30
	0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
31
	0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
32
	0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
33
	0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
34
	0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
35
	0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
36
};
37
38
static int
39
do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
40
    char *passwd, BIO * out, int quiet, int table, int reverse,
41
    size_t pw_maxlen, int usecrypt, int use1, int useapr1);
42
43
static struct {
44
	char *infile;
45
	int in_stdin;
46
	int noverify;
47
	int quiet;
48
	int reverse;
49
	char *salt;
50
	int table;
51
	int use1;
52
	int useapr1;
53
	int usecrypt;
54
} passwd_config;
55
56
static struct option passwd_options[] = {
57
#ifndef NO_MD5CRYPT_1
58
	{
59
		.name = "1",
60
		.desc = "Use MD5 based BSD password algorithm 1",
61
		.type = OPTION_FLAG,
62
		.opt.flag = &passwd_config.use1,
63
	},
64
	{
65
		.name = "apr1",
66
		.desc = "Use apr1 algorithm (Apache variant of BSD algorithm)",
67
		.type = OPTION_FLAG,
68
		.opt.flag = &passwd_config.useapr1,
69
	},
70
#endif
71
#ifndef OPENSSL_NO_DES
72
	{
73
		.name = "crypt",
74
		.desc = "Use crypt algorithm (default)",
75
		.type = OPTION_FLAG,
76
		.opt.flag = &passwd_config.usecrypt,
77
	},
78
#endif
79
	{
80
		.name = "in",
81
		.argname = "file",
82
		.desc = "Read passwords from specified file",
83
		.type = OPTION_ARG,
84
		.opt.arg = &passwd_config.infile,
85
	},
86
	{
87
		.name = "noverify",
88
		.desc = "Do not verify password",
89
		.type = OPTION_FLAG,
90
		.opt.flag = &passwd_config.noverify,
91
	},
92
	{
93
		.name = "quiet",
94
		.desc = "Do not output warnings",
95
		.type = OPTION_FLAG,
96
		.opt.flag = &passwd_config.quiet,
97
	},
98
	{
99
		.name = "reverse",
100
		.desc = "Reverse table columns (requires -table)",
101
		.type = OPTION_FLAG,
102
		.opt.flag = &passwd_config.reverse,
103
	},
104
	{
105
		.name = "salt",
106
		.argname = "string",
107
		.desc = "Use specified salt",
108
		.type = OPTION_ARG,
109
		.opt.arg = &passwd_config.salt,
110
	},
111
	{
112
		.name = "stdin",
113
		.desc = "Read passwords from stdin",
114
		.type = OPTION_FLAG,
115
		.opt.flag = &passwd_config.in_stdin,
116
	},
117
	{
118
		.name = "table",
119
		.desc = "Output cleartext and hashed passwords (tab separated)",
120
		.type = OPTION_FLAG,
121
		.opt.flag = &passwd_config.table,
122
	},
123
	{ NULL },
124
};
125
126
static void
127
passwd_usage(void)
128
{
129
8
        fprintf(stderr, "usage: passwd [-1 | -apr1 | -crypt] [-in file] "
130
	    "[-noverify] [-quiet]\n"
131
	    "    [-reverse] [-salt string] [-stdin] [-table] [password]\n\n");
132
4
        options_usage(passwd_options);
133
4
}
134
135
int
136
passwd_main(int argc, char **argv)
137
{
138
	char *passwd = NULL, **passwds = NULL;
139
32
	char *salt_malloc = NULL, *passwd_malloc = NULL;
140
	size_t passwd_malloc_size = 0;
141
	BIO *in = NULL, *out = NULL;
142
	int badopt = 0;
143
	int passed_salt = 0;
144
	size_t pw_maxlen = 0;
145
16
	int argsused;
146
	int ret = 1;
147
148
16
	if (single_execution) {
149
16
		if (pledge("stdio cpath wpath rpath tty flock", NULL) == -1) {
150
			perror("pledge");
151
			exit(1);
152
		}
153
	}
154
155
16
	memset(&passwd_config, 0, sizeof(passwd_config));
156
157
16
	if (options_parse(argc, argv, passwd_options, NULL, &argsused) != 0) {
158
4
		passwd_usage();
159
4
		goto err;
160
	}
161
162
12
	if (argsused < argc)
163
		passwds = &argv[argsused];
164
12
	if (passwd_config.salt != NULL)
165
		passed_salt = 1;
166
167
24
	if (!passwd_config.usecrypt && !passwd_config.use1 &&
168
12
	    !passwd_config.useapr1)
169
		passwd_config.usecrypt = 1;	/* use default */
170
36
	if (passwd_config.usecrypt + passwd_config.use1 +
171
24
	    passwd_config.useapr1 > 1)
172
		badopt = 1;	/* conflicting options */
173
174
	/* Reject unsupported algorithms */
175
#ifdef OPENSSL_NO_DES
176
	if (passwd_config.usecrypt)
177
		badopt = 1;
178
#endif
179
#ifdef NO_MD5CRYPT_1
180
	if (passwd_config.use1 || passwd_config.useapr1)
181
		badopt = 1;
182
#endif
183
184
12
	if (badopt) {
185
		passwd_usage();
186
		goto err;
187
	}
188
189
12
	if ((out = BIO_new(BIO_s_file())) == NULL)
190
		goto err;
191
12
	BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
192
193
12
	if (passwd_config.infile != NULL || passwd_config.in_stdin) {
194
12
		if ((in = BIO_new(BIO_s_file())) == NULL)
195
			goto err;
196
12
		if (passwd_config.infile != NULL) {
197
			assert(passwd_config.in_stdin == 0);
198
			if (BIO_read_filename(in, passwd_config.infile) <= 0)
199
				goto err;
200
		} else {
201
12
			assert(passwd_config.in_stdin);
202
12
			BIO_set_fp(in, stdin, BIO_NOCLOSE);
203
		}
204
	}
205
12
	if (passwd_config.usecrypt)
206
4
		pw_maxlen = 8;
207
8
	else if (passwd_config.use1 || passwd_config.useapr1)
208
8
		pw_maxlen = 256;/* arbitrary limit, should be enough for most
209
				 * passwords */
210
211
12
	if (passwds == NULL) {
212
		/* no passwords on the command line */
213
214
12
		passwd_malloc_size = pw_maxlen + 2;
215
		/* longer than necessary so that we can warn about truncation */
216
12
		passwd = passwd_malloc = malloc(passwd_malloc_size);
217
12
		if (passwd_malloc == NULL)
218
			goto err;
219
	}
220
12
	if (in == NULL && passwds == NULL) {
221
		/* build a null-terminated list */
222
		static char *passwds_static[2] = {NULL, NULL};
223
224
		passwds = passwds_static;
225
		if (in == NULL)
226
			if (EVP_read_pw_string(passwd_malloc,
227
			    passwd_malloc_size, "Password: ",
228
			    !(passed_salt || passwd_config.noverify)) != 0)
229
				goto err;
230
		passwds[0] = passwd_malloc;
231
	}
232
12
	if (in == NULL) {
233
		assert(passwds != NULL);
234
		assert(*passwds != NULL);
235
236
		do {	/* loop over list of passwords */
237
			passwd = *passwds++;
238
			if (!do_passwd(passed_salt, &passwd_config.salt,
239
			    &salt_malloc, passwd, out, passwd_config.quiet,
240
			    passwd_config.table, passwd_config.reverse,
241
			    pw_maxlen, passwd_config.usecrypt,
242
			    passwd_config.use1, passwd_config.useapr1))
243
				goto err;
244
		} while (*passwds != NULL);
245
	} else {
246
		int done;
247
248
12
		assert(passwd != NULL);
249
12
		do {
250
24
			int r = BIO_gets(in, passwd, pw_maxlen + 1);
251
24
			if (r > 0) {
252
12
				char *c = (strchr(passwd, '\n'));
253
12
				if (c != NULL)
254
8
					*c = 0;	/* truncate at newline */
255
				else {
256
					/* ignore rest of line */
257
4
					char trash[BUFSIZ];
258
4
					do
259
8
						r = BIO_gets(in, trash, sizeof trash);
260
8
					while ((r > 0) && (!strchr(trash, '\n')));
261
4
				}
262
263
12
				if (!do_passwd(passed_salt, &passwd_config.salt,
264
				    &salt_malloc, passwd, out,
265
12
				    passwd_config.quiet, passwd_config.table,
266
12
				    passwd_config.reverse, pw_maxlen,
267
12
				    passwd_config.usecrypt, passwd_config.use1,
268
12
				    passwd_config.useapr1))
269
					goto err;
270
12
			}
271
24
			done = (r <= 0);
272

48
		} while (!done);
273
12
	}
274
12
	ret = 0;
275
276
err:
277
16
	ERR_print_errors(bio_err);
278
279
16
	free(salt_malloc);
280
16
	free(passwd_malloc);
281
282
16
	BIO_free(in);
283
16
	BIO_free_all(out);
284
285
16
	return (ret);
286
16
}
287
288
289
#ifndef NO_MD5CRYPT_1
290
/* MD5-based password algorithm (should probably be available as a library
291
 * function; then the static buffer would not be acceptable).
292
 * For magic string "1", this should be compatible to the MD5-based BSD
293
 * password algorithm.
294
 * For 'magic' string "apr1", this is compatible to the MD5-based Apache
295
 * password algorithm.
296
 * (Apparently, the Apache password algorithm is identical except that the
297
 * 'magic' string was changed -- the laziest application of the NIH principle
298
 * I've ever encountered.)
299
 */
300
static char *
301
md5crypt(const char *passwd, const char *magic, const char *salt)
302
{
303
	static char out_buf[6 + 9 + 24 + 2];	/* "$apr1$..salt..$.......md5h
304
						 * ash..........\0" */
305
16
	unsigned char buf[MD5_DIGEST_LENGTH];
306
	char *salt_out;
307
	int n;
308
	unsigned int i;
309
8
	EVP_MD_CTX md, md2;
310
	size_t passwd_len, salt_len;
311
312
8
	passwd_len = strlen(passwd);
313
8
	out_buf[0] = '$';
314
8
	out_buf[1] = 0;
315
8
	assert(strlen(magic) <= 4);	/* "1" or "apr1" */
316
8
	strlcat(out_buf, magic, sizeof(out_buf));
317
8
	strlcat(out_buf, "$", sizeof(out_buf));
318
8
	strlcat(out_buf, salt, sizeof(out_buf));
319
8
	assert(strlen(out_buf) <= 6 + 8);	/* "$apr1$..salt.." */
320
8
	salt_out = out_buf + 2 + strlen(magic);
321
8
	salt_len = strlen(salt_out);
322
8
	assert(salt_len <= 8);
323
324
8
	EVP_MD_CTX_init(&md);
325
8
	EVP_DigestInit_ex(&md, EVP_md5(), NULL);
326
8
	EVP_DigestUpdate(&md, passwd, passwd_len);
327
8
	EVP_DigestUpdate(&md, "$", 1);
328
8
	EVP_DigestUpdate(&md, magic, strlen(magic));
329
8
	EVP_DigestUpdate(&md, "$", 1);
330
8
	EVP_DigestUpdate(&md, salt_out, salt_len);
331
332
8
	EVP_MD_CTX_init(&md2);
333
8
	EVP_DigestInit_ex(&md2, EVP_md5(), NULL);
334
8
	EVP_DigestUpdate(&md2, passwd, passwd_len);
335
8
	EVP_DigestUpdate(&md2, salt_out, salt_len);
336
8
	EVP_DigestUpdate(&md2, passwd, passwd_len);
337
8
	EVP_DigestFinal_ex(&md2, buf, NULL);
338
339
16
	for (i = passwd_len; i > sizeof buf; i -= sizeof buf)
340
		EVP_DigestUpdate(&md, buf, sizeof buf);
341
8
	EVP_DigestUpdate(&md, buf, i);
342
343
	n = passwd_len;
344
80
	while (n) {
345
32
		EVP_DigestUpdate(&md, (n & 1) ? "\0" : passwd, 1);
346
32
		n >>= 1;
347
	}
348
8
	EVP_DigestFinal_ex(&md, buf, NULL);
349
350
16016
	for (i = 0; i < 1000; i++) {
351
8000
		EVP_DigestInit_ex(&md2, EVP_md5(), NULL);
352
16000
		EVP_DigestUpdate(&md2, (i & 1) ? (unsigned const char *) passwd : buf,
353
8000
		    (i & 1) ? passwd_len : sizeof buf);
354
8000
		if (i % 3)
355
5328
			EVP_DigestUpdate(&md2, salt_out, salt_len);
356
8000
		if (i % 7)
357
6856
			EVP_DigestUpdate(&md2, passwd, passwd_len);
358
16000
		EVP_DigestUpdate(&md2, (i & 1) ? buf : (unsigned const char *) passwd,
359
8000
		    (i & 1) ? sizeof buf : passwd_len);
360
8000
		EVP_DigestFinal_ex(&md2, buf, NULL);
361
	}
362
8
	EVP_MD_CTX_cleanup(&md2);
363
364
	{
365
		/* transform buf into output string */
366
367
8
		unsigned char buf_perm[sizeof buf];
368
		int dest, source;
369
		char *output;
370
371
		/* silly output permutation */
372
240
		for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
373
112
			buf_perm[dest] = buf[source];
374
8
		buf_perm[14] = buf[5];
375
8
		buf_perm[15] = buf[11];
376
		assert(16 == sizeof buf_perm);
377
378
8
		output = salt_out + salt_len;
379
8
		assert(output == out_buf + strlen(out_buf));
380
381
8
		*output++ = '$';
382
383
96
		for (i = 0; i < 15; i += 3) {
384
40
			*output++ = cov_2char[buf_perm[i + 2] & 0x3f];
385
80
			*output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) |
386
40
			    (buf_perm[i + 2] >> 6)];
387
80
			*output++ = cov_2char[((buf_perm[i] & 3) << 4) |
388
40
			    (buf_perm[i + 1] >> 4)];
389
40
			*output++ = cov_2char[buf_perm[i] >> 2];
390
		}
391
8
		assert(i == 15);
392
8
		*output++ = cov_2char[buf_perm[i] & 0x3f];
393
8
		*output++ = cov_2char[buf_perm[i] >> 6];
394
8
		*output = 0;
395
8
		assert(strlen(out_buf) < sizeof(out_buf));
396
8
	}
397
8
	EVP_MD_CTX_cleanup(&md);
398
399
8
	return out_buf;
400
8
}
401
#endif
402
403
404
static int
405
do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
406
    char *passwd, BIO * out, int quiet, int table, int reverse,
407
    size_t pw_maxlen, int usecrypt, int use1, int useapr1)
408
{
409
	char *hash = NULL;
410
411
24
	assert(salt_p != NULL);
412
12
	assert(salt_malloc_p != NULL);
413
414
	/* first make sure we have a salt */
415
12
	if (!passed_salt) {
416
#ifndef OPENSSL_NO_DES
417
12
		if (usecrypt) {
418
4
			if (*salt_malloc_p == NULL) {
419
4
				*salt_p = *salt_malloc_p = malloc(3);
420
4
				if (*salt_malloc_p == NULL)
421
					goto err;
422
			}
423
4
			arc4random_buf(*salt_p, 2);
424
4
			(*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f];	/* 6 bits */
425
4
			(*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f];	/* 6 bits */
426
4
			(*salt_p)[2] = 0;
427
4
		}
428
#endif				/* !OPENSSL_NO_DES */
429
430
#ifndef NO_MD5CRYPT_1
431
12
		if (use1 || useapr1) {
432
			int i;
433
434
8
			if (*salt_malloc_p == NULL) {
435
8
				*salt_p = *salt_malloc_p = malloc(9);
436
8
				if (*salt_malloc_p == NULL)
437
					goto err;
438
			}
439
8
			arc4random_buf(*salt_p, 8);
440
441
144
			for (i = 0; i < 8; i++)
442
64
				(*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f];	/* 6 bits */
443
8
			(*salt_p)[8] = 0;
444
8
		}
445
#endif				/* !NO_MD5CRYPT_1 */
446
	}
447
12
	assert(*salt_p != NULL);
448
449
	/* truncate password if necessary */
450
12
	if ((strlen(passwd) > pw_maxlen)) {
451
		if (!quiet)
452
			/*
453
			 * XXX: really we should know how to print a size_t,
454
			 * not cast it
455
			 */
456
			BIO_printf(bio_err, "Warning: truncating password to %u characters\n", (unsigned) pw_maxlen);
457
		passwd[pw_maxlen] = 0;
458
	}
459
12
	assert(strlen(passwd) <= pw_maxlen);
460
461
	/* now compute password hash */
462
#ifndef OPENSSL_NO_DES
463
12
	if (usecrypt)
464
4
		hash = DES_crypt(passwd, *salt_p);
465
#endif
466
#ifndef NO_MD5CRYPT_1
467
12
	if (use1 || useapr1)
468
8
		hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
469
#endif
470
12
	assert(hash != NULL);
471
472
12
	if (table && !reverse)
473
		BIO_printf(out, "%s\t%s\n", passwd, hash);
474
12
	else if (table && reverse)
475
		BIO_printf(out, "%s\t%s\n", hash, passwd);
476
	else
477
12
		BIO_printf(out, "%s\n", hash);
478
12
	return 1;
479
480
err:
481
	return 0;
482
12
}
483
#else
484
485
int
486
passwd_main(int argc, char **argv)
487
{
488
	fputs("Program not available.\n", stderr)
489
	return (1);
490
}
491
#endif