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passwd.c

Last change on this file was 104078, checked in by vboxsync, 2 months ago
openssl-3.1.5: Applied and adjusted our OpenSSL changes to 3.1.4. bugref:10638
File size: 26.3 KB

Line
1	/*
2	* Copyright 2000-2022 The OpenSSL Project Authors. All Rights Reserved.
3	*
4	* Licensed under the Apache License 2.0 (the "License"). You may not use
5	* this file except in compliance with the License. You can obtain a copy
6	* in the file LICENSE in the source distribution or at
7	* https://www.openssl.org/source/license.html
8	*/
9
10	#include <string.h>
11
12	#include "apps.h"
13	#include "progs.h"
14
15	#include <openssl/bio.h>
16	#include <openssl/err.h>
17	#include <openssl/evp.h>
18	#include <openssl/rand.h>
19	#if !defined(OPENSSL_NO_DES) && !defined(OPENSSL_NO_DEPRECATED_3_0)
20	# include <openssl/des.h>
21	#endif
22	#include <openssl/md5.h>
23	#include <openssl/sha.h>
24
25	static const unsigned char cov_2char[64] = {
26	/* from crypto/des/fcrypt.c */
27	0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
28	0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
29	0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
30	0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
31	0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
32	0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
33	0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
34	0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
35	};
36
37	static const char ascii_dollar[] = { 0x24, 0x00 };
38
39	typedef enum {
40	passwd_unset = 0,
41	passwd_md5,
42	passwd_apr1,
43	passwd_sha256,
44	passwd_sha512,
45	passwd_aixmd5
46	} passwd_modes;
47
48	static int do_passwd(int passed_salt, char salt_p, char salt_malloc_p,
49	char passwd, BIO out, int quiet, int table,
50	int reverse, size_t pw_maxlen, passwd_modes mode);
51
52	typedef enum OPTION_choice {
53	OPT_COMMON,
54	OPT_IN,
55	OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1,
56	OPT_1, OPT_5, OPT_6, OPT_AIXMD5, OPT_SALT, OPT_STDIN,
57	OPT_R_ENUM, OPT_PROV_ENUM
58	} OPTION_CHOICE;
59
60	const OPTIONS passwd_options[] = {
61	{OPT_HELP_STR, 1, '-', "Usage: %s [options] [password]\n"},
62
63	OPT_SECTION("General"),
64	{"help", OPT_HELP, '-', "Display this summary"},
65
66	OPT_SECTION("Input"),
67	{"in", OPT_IN, '<', "Read passwords from file"},
68	{"noverify", OPT_NOVERIFY, '-',
69	"Never verify when reading password from terminal"},
70	{"stdin", OPT_STDIN, '-', "Read passwords from stdin"},
71
72	OPT_SECTION("Output"),
73	{"quiet", OPT_QUIET, '-', "No warnings"},
74	{"table", OPT_TABLE, '-', "Format output as table"},
75	{"reverse", OPT_REVERSE, '-', "Switch table columns"},
76
77	OPT_SECTION("Cryptographic"),
78	{"salt", OPT_SALT, 's', "Use provided salt"},
79	{"6", OPT_6, '-', "SHA512-based password algorithm"},
80	{"5", OPT_5, '-', "SHA256-based password algorithm"},
81	{"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"},
82	{"1", OPT_1, '-', "MD5-based password algorithm"},
83	{"aixmd5", OPT_AIXMD5, '-', "AIX MD5-based password algorithm"},
84
85	OPT_R_OPTIONS,
86	OPT_PROV_OPTIONS,
87
88	OPT_PARAMETERS(),
89	{"password", 0, 0, "Password text to digest (optional)"},
90	{NULL}
91	};
92
93	int passwd_main(int argc, char **argv)
94	{
95	BIO *in = NULL;
96	char infile = NULL, salt = NULL, passwd = NULL, *passwds = NULL;
97	char salt_malloc = NULL, passwd_malloc = NULL, *prog;
98	OPTION_CHOICE o;
99	int in_stdin = 0, pw_source_defined = 0;
100	#ifndef OPENSSL_NO_UI_CONSOLE
101	int in_noverify = 0;
102	#endif
103	int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
104	int ret = 1;
105	passwd_modes mode = passwd_unset;
106	size_t passwd_malloc_size = 0;
107	size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most
108	* passwords */
109
110	prog = opt_init(argc, argv, passwd_options);
111	while ((o = opt_next()) != OPT_EOF) {
112	switch (o) {
113	case OPT_EOF:
114	case OPT_ERR:
115	opthelp:
116	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
117	goto end;
118	case OPT_HELP:
119	opt_help(passwd_options);
120	ret = 0;
121	goto end;
122	case OPT_IN:
123	if (pw_source_defined)
124	goto opthelp;
125	infile = opt_arg();
126	pw_source_defined = 1;
127	break;
128	case OPT_NOVERIFY:
129	#ifndef OPENSSL_NO_UI_CONSOLE
130	in_noverify = 1;
131	#endif
132	break;
133	case OPT_QUIET:
134	quiet = 1;
135	break;
136	case OPT_TABLE:
137	table = 1;
138	break;
139	case OPT_REVERSE:
140	reverse = 1;
141	break;
142	case OPT_1:
143	if (mode != passwd_unset)
144	goto opthelp;
145	mode = passwd_md5;
146	break;
147	case OPT_5:
148	if (mode != passwd_unset)
149	goto opthelp;
150	mode = passwd_sha256;
151	break;
152	case OPT_6:
153	if (mode != passwd_unset)
154	goto opthelp;
155	mode = passwd_sha512;
156	break;
157	case OPT_APR1:
158	if (mode != passwd_unset)
159	goto opthelp;
160	mode = passwd_apr1;
161	break;
162	case OPT_AIXMD5:
163	if (mode != passwd_unset)
164	goto opthelp;
165	mode = passwd_aixmd5;
166	break;
167	case OPT_SALT:
168	passed_salt = 1;
169	salt = opt_arg();
170	break;
171	case OPT_STDIN:
172	if (pw_source_defined)
173	goto opthelp;
174	in_stdin = 1;
175	pw_source_defined = 1;
176	break;
177	case OPT_R_CASES:
178	if (!opt_rand(o))
179	goto end;
180	break;
181	case OPT_PROV_CASES:
182	if (!opt_provider(o))
183	goto end;
184	break;
185	}
186	}
187
188	/* All remaining arguments are the password text */
189	argc = opt_num_rest();
190	argv = opt_rest();
191	if (*argv != NULL) {
192	if (pw_source_defined)
193	goto opthelp;
194	pw_source_defined = 1;
195	passwds = argv;
196	}
197
198	if (!app_RAND_load())
199	goto end;
200
201	if (mode == passwd_unset) {
202	/* use default */
203	mode = passwd_md5;
204	}
205
206	if (infile != NULL && in_stdin) {
207	BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog);
208	goto end;
209	}
210
211	if (infile != NULL \|\| in_stdin) {
212	/*
213	* If in_stdin is true, we know that infile is NULL, and that
214	* bio_open_default() will give us back an alias for stdin.
215	*/
216	in = bio_open_default(infile, 'r', FORMAT_TEXT);
217	if (in == NULL)
218	goto end;
219	}
220
221	if (passwds == NULL) {
222	/* no passwords on the command line */
223
224	passwd_malloc_size = pw_maxlen + 2;
225	/* longer than necessary so that we can warn about truncation */
226	passwd = passwd_malloc =
227	app_malloc(passwd_malloc_size, "password buffer");
228	}
229
230	if ((in == NULL) && (passwds == NULL)) {
231	/*
232	* we use the following method to make sure what
233	* in the 'else' section is always compiled, to
234	* avoid rot of not-frequently-used code.
235	*/
236	if (1) {
237	#ifndef OPENSSL_NO_UI_CONSOLE
238	/* build a null-terminated list */
239	static char *passwds_static[2] = { NULL, NULL };
240
241	passwds = passwds_static;
242	if (in == NULL) {
243	if (EVP_read_pw_string
244	(passwd_malloc, passwd_malloc_size, "Password: ",
245	!(passed_salt \|\| in_noverify)) != 0)
246	goto end;
247	}
248	passwds[0] = passwd_malloc;
249	} else {
250	#endif
251	BIO_printf(bio_err, "password required\n");
252	goto end;
253	}
254	}
255
256	if (in == NULL) {
257	assert(passwds != NULL);
258	assert(*passwds != NULL);
259
260	do { /* loop over list of passwords */
261	passwd = *passwds++;
262	if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out,
263	quiet, table, reverse, pw_maxlen, mode))
264	goto end;
265	} while (*passwds != NULL);
266	} else {
267	/* in != NULL */
268	int done;
269
270	assert(passwd != NULL);
271	do {
272	int r = BIO_gets(in, passwd, pw_maxlen + 1);
273	if (r > 0) {
274	char *c = (strchr(passwd, '\n'));
275	if (c != NULL) {
276	c = 0; / truncate at newline */
277	} else {
278	/* ignore rest of line */
279	char trash[BUFSIZ];
280	do
281	r = BIO_gets(in, trash, sizeof(trash));
282	while ((r > 0) && (!strchr(trash, '\n')));
283	}
284
285	if (!do_passwd
286	(passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet,
287	table, reverse, pw_maxlen, mode))
288	goto end;
289	}
290	done = (r <= 0);
291	} while (!done);
292	}
293	ret = 0;
294
295	end:
296	#if 0
297	ERR_print_errors(bio_err);
298	#endif
299	OPENSSL_free(salt_malloc);
300	OPENSSL_free(passwd_malloc);
301	BIO_free(in);
302	return ret;
303	}
304
305	/*
306	* MD5-based password algorithm (should probably be available as a library
307	* function; then the static buffer would not be acceptable). For magic
308	* string "1", this should be compatible to the MD5-based BSD password
309	* algorithm. For 'magic' string "apr1", this is compatible to the MD5-based
310	* Apache password algorithm. (Apparently, the Apache password algorithm is
311	* identical except that the 'magic' string was changed -- the laziest
312	* application of the NIH principle I've ever encountered.)
313	*/
314	static char md5crypt(const char passwd, const char magic, const char salt)
315	{
316	/* "$apr1$..salt..$.......md5hash..........\0" */
317	static char out_buf[6 + 9 + 24 + 2];
318	unsigned char buf[MD5_DIGEST_LENGTH];
319	char ascii_magic[5]; /* "apr1" plus '\0' */
320	char ascii_salt[9]; /* Max 8 chars plus '\0' */
321	char *ascii_passwd = NULL;
322	char *salt_out;
323	int n;
324	unsigned int i;
325	EVP_MD_CTX md = NULL, md2 = NULL;
326	size_t passwd_len, salt_len, magic_len;
327
328	passwd_len = strlen(passwd);
329
330	out_buf[0] = 0;
331	magic_len = strlen(magic);
332	OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
333	#ifdef CHARSET_EBCDIC
334	if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */
335	ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
336	#endif
337
338	/* The salt gets truncated to 8 chars */
339	OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
340	salt_len = strlen(ascii_salt);
341	#ifdef CHARSET_EBCDIC
342	ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
343	#endif
344
345	#ifdef CHARSET_EBCDIC
346	ascii_passwd = OPENSSL_strdup(passwd);
347	if (ascii_passwd == NULL)
348	return NULL;
349	ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
350	passwd = ascii_passwd;
351	#endif
352
353	if (magic_len > 0) {
354	OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
355
356	if (magic_len > 4) /* assert it's "1" or "apr1" */
357	goto err;
358
359	OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
360	OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
361	}
362
363	OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
364
365	if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */
366	goto err;
367
368	salt_out = out_buf;
369	if (magic_len > 0)
370	salt_out += 2 + magic_len;
371
372	if (salt_len > 8)
373	goto err;
374
375	md = EVP_MD_CTX_new();
376	if (md == NULL
377	\|\| !EVP_DigestInit_ex(md, EVP_md5(), NULL)
378	\|\| !EVP_DigestUpdate(md, passwd, passwd_len))
379	goto err;
380
381	if (magic_len > 0)
382	if (!EVP_DigestUpdate(md, ascii_dollar, 1)
383	\|\| !EVP_DigestUpdate(md, ascii_magic, magic_len)
384	\|\| !EVP_DigestUpdate(md, ascii_dollar, 1))
385	goto err;
386
387	if (!EVP_DigestUpdate(md, ascii_salt, salt_len))
388	goto err;
389
390	md2 = EVP_MD_CTX_new();
391	if (md2 == NULL
392	\|\| !EVP_DigestInit_ex(md2, EVP_md5(), NULL)
393	\|\| !EVP_DigestUpdate(md2, passwd, passwd_len)
394	\|\| !EVP_DigestUpdate(md2, ascii_salt, salt_len)
395	\|\| !EVP_DigestUpdate(md2, passwd, passwd_len)
396	\|\| !EVP_DigestFinal_ex(md2, buf, NULL))
397	goto err;
398
399	for (i = passwd_len; i > sizeof(buf); i -= sizeof(buf)) {
400	if (!EVP_DigestUpdate(md, buf, sizeof(buf)))
401	goto err;
402	}
403	if (!EVP_DigestUpdate(md, buf, i))
404	goto err;
405
406	n = passwd_len;
407	while (n) {
408	if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1))
409	goto err;
410	n >>= 1;
411	}
412	if (!EVP_DigestFinal_ex(md, buf, NULL))
413	goto err;
414
415	for (i = 0; i < 1000; i++) {
416	if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL))
417	goto err;
418	if (!EVP_DigestUpdate(md2,
419	(i & 1) ? (const unsigned char *)passwd : buf,
420	(i & 1) ? passwd_len : sizeof(buf)))
421	goto err;
422	if (i % 3) {
423	if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
424	goto err;
425	}
426	if (i % 7) {
427	if (!EVP_DigestUpdate(md2, passwd, passwd_len))
428	goto err;
429	}
430	if (!EVP_DigestUpdate(md2,
431	(i & 1) ? buf : (const unsigned char *)passwd,
432	(i & 1) ? sizeof(buf) : passwd_len))
433	goto err;
434	if (!EVP_DigestFinal_ex(md2, buf, NULL))
435	goto err;
436	}
437	EVP_MD_CTX_free(md2);
438	EVP_MD_CTX_free(md);
439	md2 = NULL;
440	md = NULL;
441
442	{
443	/* transform buf into output string */
444	unsigned char buf_perm[sizeof(buf)];
445	int dest, source;
446	char *output;
447
448	/* silly output permutation */
449	for (dest = 0, source = 0; dest < 14;
450	dest++, source = (source + 6) % 17)
451	buf_perm[dest] = buf[source];
452	buf_perm[14] = buf[5];
453	buf_perm[15] = buf[11];
454	# ifndef PEDANTIC /* Unfortunately, this generates a "no
455	* effect" warning */
456	assert(16 == sizeof(buf_perm));
457	# endif
458
459	output = salt_out + salt_len;
460	assert(output == out_buf + strlen(out_buf));
461
462	*output++ = ascii_dollar[0];
463
464	for (i = 0; i < 15; i += 3) {
465	*output++ = cov_2char[buf_perm[i + 2] & 0x3f];
466	*output++ = cov_2char[((buf_perm[i + 1] & 0xf) << 2) \|
467	(buf_perm[i + 2] >> 6)];
468	*output++ = cov_2char[((buf_perm[i] & 3) << 4) \|
469	(buf_perm[i + 1] >> 4)];
470	*output++ = cov_2char[buf_perm[i] >> 2];
471	}
472	assert(i == 15);
473	*output++ = cov_2char[buf_perm[i] & 0x3f];
474	*output++ = cov_2char[buf_perm[i] >> 6];
475	*output = 0;
476	assert(strlen(out_buf) < sizeof(out_buf));
477	#ifdef CHARSET_EBCDIC
478	ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
479	#endif
480	}
481
482	return out_buf;
483
484	err:
485	OPENSSL_free(ascii_passwd);
486	EVP_MD_CTX_free(md2);
487	EVP_MD_CTX_free(md);
488	return NULL;
489	}
490
491	/*
492	* SHA based password algorithm, describe by Ulrich Drepper here:
493	* https://www.akkadia.org/drepper/SHA-crypt.txt
494	* (note that it's in the public domain)
495	*/
496	static char shacrypt(const char passwd, const char magic, const char salt)
497	{
498	/* Prefix for optional rounds specification. */
499	static const char rounds_prefix[] = "rounds=";
500	/* Maximum salt string length. */
501	# define SALT_LEN_MAX 16
502	/* Default number of rounds if not explicitly specified. */
503	# define ROUNDS_DEFAULT 5000
504	/* Minimum number of rounds. */
505	# define ROUNDS_MIN 1000
506	/* Maximum number of rounds. */
507	# define ROUNDS_MAX 999999999
508
509	/* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */
510	static char out_buf[3 + 17 + 17 + 86 + 1];
511	unsigned char buf[SHA512_DIGEST_LENGTH];
512	unsigned char temp_buf[SHA512_DIGEST_LENGTH];
513	size_t buf_size = 0;
514	char ascii_magic[2];
515	char ascii_salt[17]; /* Max 16 chars plus '\0' */
516	char *ascii_passwd = NULL;
517	size_t n;
518	EVP_MD_CTX md = NULL, md2 = NULL;
519	const EVP_MD *sha = NULL;
520	size_t passwd_len, salt_len, magic_len;
521	unsigned int rounds = ROUNDS_DEFAULT; /* Default */
522	char rounds_custom = 0;
523	char *p_bytes = NULL;
524	char *s_bytes = NULL;
525	char *cp = NULL;
526
527	passwd_len = strlen(passwd);
528	magic_len = strlen(magic);
529
530	/* assert it's "5" or "6" */
531	if (magic_len != 1)
532	return NULL;
533
534	switch (magic[0]) {
535	case '5':
536	sha = EVP_sha256();
537	buf_size = 32;
538	break;
539	case '6':
540	sha = EVP_sha512();
541	buf_size = 64;
542	break;
543	default:
544	return NULL;
545	}
546
547	if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) {
548	const char *num = salt + sizeof(rounds_prefix) - 1;
549	char *endp;
550	unsigned long int srounds = strtoul (num, &endp, 10);
551	if (*endp == '$') {
552	salt = endp + 1;
553	if (srounds > ROUNDS_MAX)
554	rounds = ROUNDS_MAX;
555	else if (srounds < ROUNDS_MIN)
556	rounds = ROUNDS_MIN;
557	else
558	rounds = (unsigned int)srounds;
559	rounds_custom = 1;
560	} else {
561	return NULL;
562	}
563	}
564
565	OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic));
566	#ifdef CHARSET_EBCDIC
567	if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */
568	ebcdic2ascii(ascii_magic, ascii_magic, magic_len);
569	#endif
570
571	/* The salt gets truncated to 16 chars */
572	OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt));
573	salt_len = strlen(ascii_salt);
574	#ifdef CHARSET_EBCDIC
575	ebcdic2ascii(ascii_salt, ascii_salt, salt_len);
576	#endif
577
578	#ifdef CHARSET_EBCDIC
579	ascii_passwd = OPENSSL_strdup(passwd);
580	if (ascii_passwd == NULL)
581	return NULL;
582	ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len);
583	passwd = ascii_passwd;
584	#endif
585
586	out_buf[0] = 0;
587	OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
588	OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf));
589	OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
590	if (rounds_custom) {
591	char tmp_buf[80]; /* "rounds=999999999" */
592	sprintf(tmp_buf, "rounds=%u", rounds);
593	#ifdef CHARSET_EBCDIC
594	/* In case we're really on a ASCII based platform and just pretend */
595	if (tmp_buf[0] != 0x72) /* ASCII 'r' */
596	ebcdic2ascii(tmp_buf, tmp_buf, strlen(tmp_buf));
597	#endif
598	OPENSSL_strlcat(out_buf, tmp_buf, sizeof(out_buf));
599	OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf));
600	}
601	OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf));
602
603	/* assert "$5$rounds=999999999$......salt......" */
604	if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len )
605	goto err;
606
607	md = EVP_MD_CTX_new();
608	if (md == NULL
609	\|\| !EVP_DigestInit_ex(md, sha, NULL)
610	\|\| !EVP_DigestUpdate(md, passwd, passwd_len)
611	\|\| !EVP_DigestUpdate(md, ascii_salt, salt_len))
612	goto err;
613
614	md2 = EVP_MD_CTX_new();
615	if (md2 == NULL
616	\|\| !EVP_DigestInit_ex(md2, sha, NULL)
617	\|\| !EVP_DigestUpdate(md2, passwd, passwd_len)
618	\|\| !EVP_DigestUpdate(md2, ascii_salt, salt_len)
619	\|\| !EVP_DigestUpdate(md2, passwd, passwd_len)
620	\|\| !EVP_DigestFinal_ex(md2, buf, NULL))
621	goto err;
622
623	for (n = passwd_len; n > buf_size; n -= buf_size) {
624	if (!EVP_DigestUpdate(md, buf, buf_size))
625	goto err;
626	}
627	if (!EVP_DigestUpdate(md, buf, n))
628	goto err;
629
630	n = passwd_len;
631	while (n) {
632	if (!EVP_DigestUpdate(md,
633	(n & 1) ? buf : (const unsigned char *)passwd,
634	(n & 1) ? buf_size : passwd_len))
635	goto err;
636	n >>= 1;
637	}
638	if (!EVP_DigestFinal_ex(md, buf, NULL))
639	goto err;
640
641	/* P sequence */
642	if (!EVP_DigestInit_ex(md2, sha, NULL))
643	goto err;
644
645	for (n = passwd_len; n > 0; n--)
646	if (!EVP_DigestUpdate(md2, passwd, passwd_len))
647	goto err;
648
649	if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
650	goto err;
651
652	if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL)
653	goto err;
654	for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size)
655	memcpy(cp, temp_buf, buf_size);
656	memcpy(cp, temp_buf, n);
657
658	/* S sequence */
659	if (!EVP_DigestInit_ex(md2, sha, NULL))
660	goto err;
661
662	for (n = 16 + buf[0]; n > 0; n--)
663	if (!EVP_DigestUpdate(md2, ascii_salt, salt_len))
664	goto err;
665
666	if (!EVP_DigestFinal_ex(md2, temp_buf, NULL))
667	goto err;
668
669	if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL)
670	goto err;
671	for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size)
672	memcpy(cp, temp_buf, buf_size);
673	memcpy(cp, temp_buf, n);
674
675	for (n = 0; n < rounds; n++) {
676	if (!EVP_DigestInit_ex(md2, sha, NULL))
677	goto err;
678	if (!EVP_DigestUpdate(md2,
679	(n & 1) ? (const unsigned char *)p_bytes : buf,
680	(n & 1) ? passwd_len : buf_size))
681	goto err;
682	if (n % 3) {
683	if (!EVP_DigestUpdate(md2, s_bytes, salt_len))
684	goto err;
685	}
686	if (n % 7) {
687	if (!EVP_DigestUpdate(md2, p_bytes, passwd_len))
688	goto err;
689	}
690	if (!EVP_DigestUpdate(md2,
691	(n & 1) ? buf : (const unsigned char *)p_bytes,
692	(n & 1) ? buf_size : passwd_len))
693	goto err;
694	if (!EVP_DigestFinal_ex(md2, buf, NULL))
695	goto err;
696	}
697	EVP_MD_CTX_free(md2);
698	EVP_MD_CTX_free(md);
699	md2 = NULL;
700	md = NULL;
701	OPENSSL_free(p_bytes);
702	OPENSSL_free(s_bytes);
703	p_bytes = NULL;
704	s_bytes = NULL;
705
706	cp = out_buf + strlen(out_buf);
707	*cp++ = ascii_dollar[0];
708
709	# define b64_from_24bit(B2, B1, B0, N) \
710	do { \
711	unsigned int w = ((B2) << 16) \| ((B1) << 8) \| (B0); \
712	int i = (N); \
713	while (i-- > 0) \
714	{ \
715	*cp++ = cov_2char[w & 0x3f]; \
716	w >>= 6; \
717	} \
718	} while (0)
719
720	switch (magic[0]) {
721	case '5':
722	b64_from_24bit (buf[0], buf[10], buf[20], 4);
723	b64_from_24bit (buf[21], buf[1], buf[11], 4);
724	b64_from_24bit (buf[12], buf[22], buf[2], 4);
725	b64_from_24bit (buf[3], buf[13], buf[23], 4);
726	b64_from_24bit (buf[24], buf[4], buf[14], 4);
727	b64_from_24bit (buf[15], buf[25], buf[5], 4);
728	b64_from_24bit (buf[6], buf[16], buf[26], 4);
729	b64_from_24bit (buf[27], buf[7], buf[17], 4);
730	b64_from_24bit (buf[18], buf[28], buf[8], 4);
731	b64_from_24bit (buf[9], buf[19], buf[29], 4);
732	b64_from_24bit (0, buf[31], buf[30], 3);
733	break;
734	case '6':
735	b64_from_24bit (buf[0], buf[21], buf[42], 4);
736	b64_from_24bit (buf[22], buf[43], buf[1], 4);
737	b64_from_24bit (buf[44], buf[2], buf[23], 4);
738	b64_from_24bit (buf[3], buf[24], buf[45], 4);
739	b64_from_24bit (buf[25], buf[46], buf[4], 4);
740	b64_from_24bit (buf[47], buf[5], buf[26], 4);
741	b64_from_24bit (buf[6], buf[27], buf[48], 4);
742	b64_from_24bit (buf[28], buf[49], buf[7], 4);
743	b64_from_24bit (buf[50], buf[8], buf[29], 4);
744	b64_from_24bit (buf[9], buf[30], buf[51], 4);
745	b64_from_24bit (buf[31], buf[52], buf[10], 4);
746	b64_from_24bit (buf[53], buf[11], buf[32], 4);
747	b64_from_24bit (buf[12], buf[33], buf[54], 4);
748	b64_from_24bit (buf[34], buf[55], buf[13], 4);
749	b64_from_24bit (buf[56], buf[14], buf[35], 4);
750	b64_from_24bit (buf[15], buf[36], buf[57], 4);
751	b64_from_24bit (buf[37], buf[58], buf[16], 4);
752	b64_from_24bit (buf[59], buf[17], buf[38], 4);
753	b64_from_24bit (buf[18], buf[39], buf[60], 4);
754	b64_from_24bit (buf[40], buf[61], buf[19], 4);
755	b64_from_24bit (buf[62], buf[20], buf[41], 4);
756	b64_from_24bit (0, 0, buf[63], 2);
757	break;
758	default:
759	goto err;
760	}
761	*cp = '\0';
762	#ifdef CHARSET_EBCDIC
763	ascii2ebcdic(out_buf, out_buf, strlen(out_buf));
764	#endif
765
766	return out_buf;
767
768	err:
769	EVP_MD_CTX_free(md2);
770	EVP_MD_CTX_free(md);
771	OPENSSL_free(p_bytes);
772	OPENSSL_free(s_bytes);
773	OPENSSL_free(ascii_passwd);
774	return NULL;
775	}
776
777	static int do_passwd(int passed_salt, char salt_p, char salt_malloc_p,
778	char passwd, BIO out, int quiet, int table,
779	int reverse, size_t pw_maxlen, passwd_modes mode)
780	{
781	char *hash = NULL;
782
783	assert(salt_p != NULL);
784	assert(salt_malloc_p != NULL);
785
786	/* first make sure we have a salt */
787	if (!passed_salt) {
788	size_t saltlen = 0;
789	size_t i;
790
791	if (mode == passwd_md5 \|\| mode == passwd_apr1 \|\| mode == passwd_aixmd5)
792	saltlen = 8;
793
794	if (mode == passwd_sha256 \|\| mode == passwd_sha512)
795	saltlen = 16;
796
797	assert(saltlen != 0);
798
799	if (*salt_malloc_p == NULL)
800	salt_p = salt_malloc_p = app_malloc(saltlen + 1, "salt buffer");
801	if (RAND_bytes((unsigned char )salt_p, saltlen) <= 0)
802	goto end;
803
804	for (i = 0; i < saltlen; i++)
805	(salt_p)[i] = cov_2char[(salt_p)[i] & 0x3f]; /* 6 bits */
806	(*salt_p)[i] = 0;
807	# ifdef CHARSET_EBCDIC
808	/* The password encryption function will convert back to ASCII */
809	ascii2ebcdic(salt_p, salt_p, saltlen);
810	# endif
811	}
812
813	assert(*salt_p != NULL);
814
815	/* truncate password if necessary */
816	if ((strlen(passwd) > pw_maxlen)) {
817	if (!quiet)
818	/*
819	* XXX: really we should know how to print a size_t, not cast it
820	*/
821	BIO_printf(bio_err,
822	"Warning: truncating password to %u characters\n",
823	(unsigned)pw_maxlen);
824	passwd[pw_maxlen] = 0;
825	}
826	assert(strlen(passwd) <= pw_maxlen);
827
828	/* now compute password hash */
829	if (mode == passwd_md5 \|\| mode == passwd_apr1)
830	hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p);
831	if (mode == passwd_aixmd5)
832	hash = md5crypt(passwd, "", *salt_p);
833	if (mode == passwd_sha256 \|\| mode == passwd_sha512)
834	hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p);
835	assert(hash != NULL);
836
837	if (table && !reverse)
838	BIO_printf(out, "%s\t%s\n", passwd, hash);
839	else if (table && reverse)
840	BIO_printf(out, "%s\t%s\n", hash, passwd);
841	else
842	BIO_printf(out, "%s\n", hash);
843	return 1;
844
845	end:
846	return 0;
847	}

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source: vbox/trunk/src/libs/openssl-3.1.5/apps/passwd.c

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