GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/pem/pem_lib.c Lines: 326 457 71.3 %
Date: 2017-11-13 Branches: 173 294 58.8 %

Line Branch Exec Source
1
/* $OpenBSD: pem_lib.c,v 1.45 2017/05/02 03:59:44 deraadt Exp $ */
2
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3
 * All rights reserved.
4
 *
5
 * This package is an SSL implementation written
6
 * by Eric Young (eay@cryptsoft.com).
7
 * The implementation was written so as to conform with Netscapes SSL.
8
 *
9
 * This library is free for commercial and non-commercial use as long as
10
 * the following conditions are aheared to.  The following conditions
11
 * apply to all code found in this distribution, be it the RC4, RSA,
12
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13
 * included with this distribution is covered by the same copyright terms
14
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15
 *
16
 * Copyright remains Eric Young's, and as such any Copyright notices in
17
 * the code are not to be removed.
18
 * If this package is used in a product, Eric Young should be given attribution
19
 * as the author of the parts of the library used.
20
 * This can be in the form of a textual message at program startup or
21
 * in documentation (online or textual) provided with the package.
22
 *
23
 * Redistribution and use in source and binary forms, with or without
24
 * modification, are permitted provided that the following conditions
25
 * are met:
26
 * 1. Redistributions of source code must retain the copyright
27
 *    notice, this list of conditions and the following disclaimer.
28
 * 2. Redistributions in binary form must reproduce the above copyright
29
 *    notice, this list of conditions and the following disclaimer in the
30
 *    documentation and/or other materials provided with the distribution.
31
 * 3. All advertising materials mentioning features or use of this software
32
 *    must display the following acknowledgement:
33
 *    "This product includes cryptographic software written by
34
 *     Eric Young (eay@cryptsoft.com)"
35
 *    The word 'cryptographic' can be left out if the rouines from the library
36
 *    being used are not cryptographic related :-).
37
 * 4. If you include any Windows specific code (or a derivative thereof) from
38
 *    the apps directory (application code) you must include an acknowledgement:
39
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40
 *
41
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51
 * SUCH DAMAGE.
52
 *
53
 * The licence and distribution terms for any publically available version or
54
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55
 * copied and put under another distribution licence
56
 * [including the GNU Public Licence.]
57
 */
58
59
#include <ctype.h>
60
#include <stdio.h>
61
#include <stdlib.h>
62
#include <string.h>
63
64
#include <openssl/opensslconf.h>
65
66
#include <openssl/buffer.h>
67
#include <openssl/err.h>
68
#include <openssl/evp.h>
69
#include <openssl/objects.h>
70
#include <openssl/pem.h>
71
#include <openssl/pkcs12.h>
72
#include <openssl/x509.h>
73
74
#ifndef OPENSSL_NO_DES
75
#include <openssl/des.h>
76
#endif
77
#ifndef OPENSSL_NO_ENGINE
78
#include <openssl/engine.h>
79
#endif
80
81
#include "asn1_locl.h"
82
83
#define MIN_LENGTH	4
84
85
static int load_iv(char **fromp, unsigned char *to, int num);
86
static int check_pem(const char *nm, const char *name);
87
int pem_check_suffix(const char *pem_str, const char *suffix);
88
89
/* XXX LSSL ABI XXX return value and `num' ought to be size_t */
90
int
91
PEM_def_callback(char *buf, int num, int w, void *key)
92
{
93
	size_t l;
94
	int i;
95
	const char *prompt;
96
97
32
	if (num < 0)
98
		return -1;
99
100
16
	if (key) {
101
16
		l = strlen(key);
102
16
		if (l > (size_t)num)
103
			l = (size_t)num;
104
16
		memcpy(buf, key, l);
105
16
		return (int)l;
106
	}
107
108
	prompt = EVP_get_pw_prompt();
109
	if (prompt == NULL)
110
		prompt = "Enter PEM pass phrase:";
111
112
	for (;;) {
113
		i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w);
114
		if (i != 0) {
115
			PEMerror(PEM_R_PROBLEMS_GETTING_PASSWORD);
116
			memset(buf, 0, num);
117
			return (-1);
118
		}
119
		l = strlen(buf);
120
		if (l < MIN_LENGTH) {
121
			fprintf(stderr, "phrase is too short, "
122
			    "needs to be at least %zu chars\n",
123
			    (size_t)MIN_LENGTH);
124
		} else
125
			break;
126
	}
127
	return (int)l;
128
16
}
129
130
void
131
PEM_proc_type(char *buf, int type)
132
{
133
	const char *str;
134
135
8
	if (type == PEM_TYPE_ENCRYPTED)
136
4
		str = "ENCRYPTED";
137
	else if (type == PEM_TYPE_MIC_CLEAR)
138
		str = "MIC-CLEAR";
139
	else if (type == PEM_TYPE_MIC_ONLY)
140
		str = "MIC-ONLY";
141
	else
142
		str = "BAD-TYPE";
143
144
4
	strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
145
4
	strlcat(buf, str, PEM_BUFSIZE);
146
4
	strlcat(buf, "\n", PEM_BUFSIZE);
147
4
}
148
149
void
150
PEM_dek_info(char *buf, const char *type, int len, char *str)
151
{
152
	static const unsigned char map[17] = "0123456789ABCDEF";
153
	long i;
154
	int j;
155
156
8
	strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
157
4
	strlcat(buf, type, PEM_BUFSIZE);
158
4
	strlcat(buf, ",", PEM_BUFSIZE);
159
4
	j = strlen(buf);
160
4
	if (j + (len * 2) + 1 > PEM_BUFSIZE)
161
		return;
162
104
	for (i = 0; i < len; i++) {
163
48
		buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
164
48
		buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
165
	}
166
4
	buf[j + i * 2] = '\n';
167
4
	buf[j + i * 2 + 1] = '\0';
168
8
}
169
170
void *
171
PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
172
    pem_password_cb *cb, void *u)
173
{
174
	BIO *b;
175
	void *ret;
176
177
	if ((b = BIO_new(BIO_s_file())) == NULL) {
178
		PEMerror(ERR_R_BUF_LIB);
179
		return (0);
180
	}
181
	BIO_set_fp(b, fp, BIO_NOCLOSE);
182
	ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
183
	BIO_free(b);
184
	return (ret);
185
}
186
187
static int
188
check_pem(const char *nm, const char *name)
189
{
190
	/* Normal matching nm and name */
191
5250
	if (!strcmp(nm, name))
192
1418
		return 1;
193
194
	/* Make PEM_STRING_EVP_PKEY match any private key */
195
196
1207
	if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
197
		int slen;
198
		const EVP_PKEY_ASN1_METHOD *ameth;
199
977
		if (!strcmp(nm, PEM_STRING_PKCS8))
200
24
			return 1;
201
953
		if (!strcmp(nm, PEM_STRING_PKCS8INF))
202
194
			return 1;
203
759
		slen = pem_check_suffix(nm, "PRIVATE KEY");
204
759
		if (slen > 0) {
205
			/* NB: ENGINE implementations wont contain
206
			 * a deprecated old private key decode function
207
			 * so don't look for them.
208
			 */
209
385
			ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
210

770
			if (ameth && ameth->old_priv_decode)
211
385
				return 1;
212
		}
213
374
		return 0;
214
	}
215
216
230
	if (!strcmp(name, PEM_STRING_PARAMETERS)) {
217
		int slen;
218
		const EVP_PKEY_ASN1_METHOD *ameth;
219
14
		slen = pem_check_suffix(nm, "PARAMETERS");
220
14
		if (slen > 0) {
221
14
			ENGINE *e;
222
14
			ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
223
14
			if (ameth) {
224
				int r;
225
14
				if (ameth->param_decode)
226
14
					r = 1;
227
				else
228
					r = 0;
229
#ifndef OPENSSL_NO_ENGINE
230
14
				if (e)
231
					ENGINE_finish(e);
232
#endif
233
				return r;
234
			}
235
14
		}
236
		return 0;
237
	}
238
239
	/* Permit older strings */
240
241

216
	if (!strcmp(nm, PEM_STRING_X509_OLD) &&
242
	    !strcmp(name, PEM_STRING_X509))
243
		return 1;
244
245

216
	if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
246
	    !strcmp(name, PEM_STRING_X509_REQ))
247
		return 1;
248
249
	/* Allow normal certs to be read as trusted certs */
250

404
	if (!strcmp(nm, PEM_STRING_X509) &&
251
188
	    !strcmp(name, PEM_STRING_X509_TRUSTED))
252
184
		return 1;
253
254

32
	if (!strcmp(nm, PEM_STRING_X509_OLD) &&
255
	    !strcmp(name, PEM_STRING_X509_TRUSTED))
256
		return 1;
257
258
	/* Some CAs use PKCS#7 with CERTIFICATE headers */
259

36
	if (!strcmp(nm, PEM_STRING_X509) &&
260
4
	    !strcmp(name, PEM_STRING_PKCS7))
261
		return 1;
262
263

32
	if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
264
	    !strcmp(name, PEM_STRING_PKCS7))
265
		return 1;
266
267
268
32
	return 0;
269
2625
}
270
271
int
272
PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
273
    const char *name, BIO *bp, pem_password_cb *cb, void *u)
274
{
275
4710
	EVP_CIPHER_INFO cipher;
276
2355
	char *nm = NULL, *header = NULL;
277
2355
	unsigned char *data = NULL;
278
2355
	long len;
279
	int ret = 0;
280
281
2761
	for (;;) {
282
2761
		if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
283
136
			if (ERR_GET_REASON(ERR_peek_error()) ==
284
			    PEM_R_NO_START_LINE)
285
136
				ERR_asprintf_error_data("Expecting: %s", name);
286
136
			return 0;
287
		}
288
2625
		if (check_pem(nm, name))
289
			break;
290
406
		free(nm);
291
406
		free(header);
292
406
		free(data);
293
	}
294
2219
	if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
295
		goto err;
296
2219
	if (!PEM_do_header(&cipher, data, &len, cb, u))
297
		goto err;
298
299
2219
	*pdata = data;
300
2219
	*plen = len;
301
302
2219
	if (pnm)
303
617
		*pnm = nm;
304
305
2219
	ret = 1;
306
307
err:
308
2219
	if (!ret || !pnm)
309
1602
		free(nm);
310
2219
	free(header);
311
2219
	if (!ret)
312
		free(data);
313
2219
	return ret;
314
2355
}
315
316
int
317
PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, void *x,
318
    const EVP_CIPHER *enc, unsigned char *kstr, int klen,
319
    pem_password_cb *callback, void *u)
320
{
321
	BIO *b;
322
	int ret;
323
324
	if ((b = BIO_new(BIO_s_file())) == NULL) {
325
		PEMerror(ERR_R_BUF_LIB);
326
		return (0);
327
	}
328
	BIO_set_fp(b, fp, BIO_NOCLOSE);
329
	ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
330
	BIO_free(b);
331
	return (ret);
332
}
333
334
int
335
PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, void *x,
336
    const EVP_CIPHER *enc, unsigned char *kstr, int klen,
337
    pem_password_cb *callback, void *u)
338
{
339
1578
	EVP_CIPHER_CTX ctx;
340
789
	int dsize = 0, i, j, ret = 0;
341
789
	unsigned char *p, *data = NULL;
342
	const char *objstr = NULL;
343
789
	char buf[PEM_BUFSIZE];
344
789
	unsigned char key[EVP_MAX_KEY_LENGTH];
345
789
	unsigned char iv[EVP_MAX_IV_LENGTH];
346
347
789
	if (enc != NULL) {
348
4
		objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
349
4
		if (objstr == NULL) {
350
			PEMerror(PEM_R_UNSUPPORTED_CIPHER);
351
			goto err;
352
		}
353
	}
354
355
789
	if ((dsize = i2d(x, NULL)) < 0) {
356
		PEMerror(ERR_R_ASN1_LIB);
357
		dsize = 0;
358
		goto err;
359
	}
360
	/* dzise + 8 bytes are needed */
361
	/* actually it needs the cipher block size extra... */
362
789
	data = malloc(dsize + 20);
363
789
	if (data == NULL) {
364
		PEMerror(ERR_R_MALLOC_FAILURE);
365
		goto err;
366
	}
367
789
	p = data;
368
789
	i = i2d(x, &p);
369
370
789
	if (enc != NULL) {
371
4
		if (kstr == NULL) {
372
4
			if (callback == NULL)
373
2
				klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
374
			else
375
2
				klen = (*callback)(buf, PEM_BUFSIZE, 1, u);
376
4
			if (klen <= 0) {
377
				PEMerror(PEM_R_READ_KEY);
378
				goto err;
379
			}
380
4
			kstr = (unsigned char *)buf;
381
4
		}
382
4
		if ((size_t)enc->iv_len > sizeof(iv)) {
383
			PEMerror(EVP_R_IV_TOO_LARGE);
384
			goto err;
385
		}
386
4
		arc4random_buf(iv, enc->iv_len); /* Generate a salt */
387
		/* The 'iv' is used as the iv and as a salt.  It is
388
		 * NOT taken from the BytesToKey function */
389
8
		if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1,
390
4
		    key, NULL))
391
			goto err;
392
393
4
		if (kstr == (unsigned char *)buf)
394
4
			explicit_bzero(buf, PEM_BUFSIZE);
395
396
4
		if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > sizeof buf) {
397
			PEMerror(ASN1_R_BUFFER_TOO_SMALL);
398
			goto err;
399
		}
400
401
4
		buf[0] = '\0';
402
4
		PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
403
4
		PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
404
		/* k=strlen(buf); */
405
406
4
		EVP_CIPHER_CTX_init(&ctx);
407
		ret = 1;
408

8
		if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) ||
409
4
		    !EVP_EncryptUpdate(&ctx, data, &j, data, i) ||
410
4
		    !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i))
411
			ret = 0;
412
4
		EVP_CIPHER_CTX_cleanup(&ctx);
413
4
		if (ret == 0)
414
			goto err;
415
4
		i += j;
416
4
	} else {
417
		ret = 1;
418
785
		buf[0] = '\0';
419
	}
420
789
	i = PEM_write_bio(bp, name, buf, data, i);
421
789
	if (i <= 0)
422
		ret = 0;
423
err:
424
789
	explicit_bzero(key, sizeof(key));
425
789
	explicit_bzero(iv, sizeof(iv));
426
789
	explicit_bzero((char *)&ctx, sizeof(ctx));
427
789
	explicit_bzero(buf, PEM_BUFSIZE);
428
789
	freezero(data, (unsigned int)dsize);
429
789
	return (ret);
430
789
}
431
432
int
433
PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
434
    pem_password_cb *callback, void *u)
435
{
436
24752
	int i, j, o, klen;
437
	long len;
438
12376
	EVP_CIPHER_CTX ctx;
439
12376
	unsigned char key[EVP_MAX_KEY_LENGTH];
440
12376
	char buf[PEM_BUFSIZE];
441
442
12376
	len = *plen;
443
444
12376
	if (cipher->cipher == NULL)
445
12370
		return (1);
446
6
	if (callback == NULL)
447
		klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
448
	else
449
6
		klen = callback(buf, PEM_BUFSIZE, 0, u);
450
6
	if (klen <= 0) {
451
		PEMerror(PEM_R_BAD_PASSWORD_READ);
452
		return (0);
453
	}
454
12
	if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
455
6
	    (unsigned char *)buf, klen, 1, key, NULL))
456
		return 0;
457
458
6
	j = (int)len;
459
6
	EVP_CIPHER_CTX_init(&ctx);
460
6
	o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key,
461
	    &(cipher->iv[0]));
462
6
	if (o)
463
6
		o = EVP_DecryptUpdate(&ctx, data, &i, data, j);
464
6
	if (o)
465
6
		o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
466
6
	EVP_CIPHER_CTX_cleanup(&ctx);
467
6
	explicit_bzero((char *)buf, sizeof(buf));
468
6
	explicit_bzero((char *)key, sizeof(key));
469
6
	if (!o) {
470
		PEMerror(PEM_R_BAD_DECRYPT);
471
		return (0);
472
	}
473
6
	*plen = j + i;
474
6
	return (1);
475
12376
}
476
477
int
478
PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
479
{
480
	const EVP_CIPHER *enc = NULL;
481
	char *p, c;
482
	char **header_pp = &header;
483
484
12376
	cipher->cipher = NULL;
485

24758
	if ((header == NULL) || (*header == '\0') || (*header == '\n'))
486
12370
		return (1);
487
6
	if (strncmp(header, "Proc-Type: ", 11) != 0) {
488
		PEMerror(PEM_R_NOT_PROC_TYPE);
489
		return (0);
490
	}
491
6
	header += 11;
492
6
	if (*header != '4')
493
		return (0);
494
6
	header++;
495
6
	if (*header != ',')
496
		return (0);
497
6
	header++;
498
6
	if (strncmp(header, "ENCRYPTED", 9) != 0) {
499
		PEMerror(PEM_R_NOT_ENCRYPTED);
500
		return (0);
501
	}
502

174
	for (; (*header != '\n') && (*header != '\0'); header++)
503
		;
504
6
	if (*header == '\0') {
505
		PEMerror(PEM_R_SHORT_HEADER);
506
		return (0);
507
	}
508
6
	header++;
509
6
	if (strncmp(header, "DEK-Info: ", 10) != 0) {
510
		PEMerror(PEM_R_NOT_DEK_INFO);
511
		return (0);
512
	}
513
6
	header += 10;
514
515
	p = header;
516
72
	for (;;) {
517
72
		c= *header;
518


162
		if (!(	((c >= 'A') && (c <= 'Z')) || (c == '-') ||
519
42
		    ((c >= '0') && (c <= '9'))))
520
			break;
521
66
		header++;
522
	}
523
6
	*header = '\0';
524
6
	cipher->cipher = enc = EVP_get_cipherbyname(p);
525
6
	*header = c;
526
6
	header++;
527
528
6
	if (enc == NULL) {
529
		PEMerror(PEM_R_UNSUPPORTED_ENCRYPTION);
530
		return (0);
531
	}
532
6
	if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
533
		return (0);
534
535
6
	return (1);
536
12376
}
537
538
static int
539
load_iv(char **fromp, unsigned char *to, int num)
540
{
541
	int v, i;
542
	char *from;
543
544
12
	from= *fromp;
545
204
	for (i = 0; i < num; i++)
546
96
		to[i] = 0;
547
6
	num *= 2;
548
396
	for (i = 0; i < num; i++) {
549

384
		if ((*from >= '0') && (*from <= '9'))
550
117
			v = *from - '0';
551

150
		else if ((*from >= 'A') && (*from <= 'F'))
552
75
			v = *from - 'A' + 10;
553
		else if ((*from >= 'a') && (*from <= 'f'))
554
			v = *from - 'a' + 10;
555
		else {
556
			PEMerror(PEM_R_BAD_IV_CHARS);
557
			return (0);
558
		}
559
192
		from++;
560
192
		to[i / 2] |= v << (long)((!(i & 1)) * 4);
561
	}
562
563
6
	*fromp = from;
564
6
	return (1);
565
6
}
566
567
int
568
PEM_write(FILE *fp, char *name, char *header, unsigned char *data, long len)
569
{
570
	BIO *b;
571
	int ret;
572
573
	if ((b = BIO_new(BIO_s_file())) == NULL) {
574
		PEMerror(ERR_R_BUF_LIB);
575
		return (0);
576
	}
577
	BIO_set_fp(b, fp, BIO_NOCLOSE);
578
	ret = PEM_write_bio(b, name, header, data, len);
579
	BIO_free(b);
580
	return (ret);
581
}
582
583
int
584
PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
585
    long len)
586
{
587
1578
	int nlen, n, i, j, outl;
588
	unsigned char *buf = NULL;
589
789
	EVP_ENCODE_CTX ctx;
590
	int reason = ERR_R_BUF_LIB;
591
592
789
	EVP_EncodeInit(&ctx);
593
789
	nlen = strlen(name);
594
595

1578
	if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
596
789
	    (BIO_write(bp, name, nlen) != nlen) ||
597
789
	    (BIO_write(bp, "-----\n", 6) != 6))
598
		goto err;
599
600
789
	i = strlen(header);
601
789
	if (i > 0) {
602

8
		if ((BIO_write(bp, header, i) != i) ||
603
4
		    (BIO_write(bp, "\n", 1) != 1))
604
			goto err;
605
	}
606
607
789
	buf = reallocarray(NULL, PEM_BUFSIZE, 8);
608
789
	if (buf == NULL) {
609
		reason = ERR_R_MALLOC_FAILURE;
610
		goto err;
611
	}
612
613
	i = j = 0;
614
3156
	while (len > 0) {
615
789
		n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
616
789
		EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n);
617

1578
		if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
618
			goto err;
619
789
		i += outl;
620
789
		len -= n;
621
789
		j += n;
622
	}
623
789
	EVP_EncodeFinal(&ctx, buf, &outl);
624

1552
	if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
625
		goto err;
626
789
	freezero(buf, PEM_BUFSIZE * 8);
627
	buf = NULL;
628

1578
	if ((BIO_write(bp, "-----END ", 9) != 9) ||
629
789
	    (BIO_write(bp, name, nlen) != nlen) ||
630
789
	    (BIO_write(bp, "-----\n", 6) != 6))
631
		goto err;
632
789
	return (i + outl);
633
634
err:
635
	freezero(buf, PEM_BUFSIZE * 8);
636
	PEMerror(reason);
637
	return (0);
638
789
}
639
640
int
641
PEM_read(FILE *fp, char **name, char **header, unsigned char **data, long *len)
642
{
643
	BIO *b;
644
	int ret;
645
646
	if ((b = BIO_new(BIO_s_file())) == NULL) {
647
		PEMerror(ERR_R_BUF_LIB);
648
		return (0);
649
	}
650
	BIO_set_fp(b, fp, BIO_NOCLOSE);
651
	ret = PEM_read_bio(b, name, header, data, len);
652
	BIO_free(b);
653
	return (ret);
654
}
655
656
int
657
PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
658
    long *len)
659
{
660
26398
	EVP_ENCODE_CTX ctx;
661
13199
	int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
662
13199
	char buf[256];
663
	BUF_MEM *nameB;
664
	BUF_MEM *headerB;
665
	BUF_MEM *dataB, *tmpB;
666
667
13199
	nameB = BUF_MEM_new();
668
13199
	headerB = BUF_MEM_new();
669
13199
	dataB = BUF_MEM_new();
670
13199
	if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
671
		BUF_MEM_free(nameB);
672
		BUF_MEM_free(headerB);
673
		BUF_MEM_free(dataB);
674
		PEMerror(ERR_R_MALLOC_FAILURE);
675
		return (0);
676
	}
677
678
13199
	buf[254] = '\0';
679
258608
	for (;;) {
680
258608
		i = BIO_gets(bp, buf, 254);
681
682
258608
		if (i <= 0) {
683
417
			PEMerror(PEM_R_NO_START_LINE);
684
417
			goto err;
685
		}
686
687

3152241
		while ((i >= 0) && (buf[i] <= ' '))
688
533944
			i--;
689
258191
		buf[++i] = '\n';
690
258191
		buf[++i] = '\0';
691
692
258191
		if (strncmp(buf, "-----BEGIN ", 11) == 0) {
693
12782
			i = strlen(&(buf[11]));
694
695
12782
			if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
696
				continue;
697
12782
			if (!BUF_MEM_grow(nameB, i + 9)) {
698
				PEMerror(ERR_R_MALLOC_FAILURE);
699
				goto err;
700
			}
701
12782
			memcpy(nameB->data, &(buf[11]), i - 6);
702
12782
			nameB->data[i - 6] = '\0';
703
			break;
704
		}
705
	}
706
	hl = 0;
707
12782
	if (!BUF_MEM_grow(headerB, 256)) {
708
		PEMerror(ERR_R_MALLOC_FAILURE);
709
		goto err;
710
	}
711
12782
	headerB->data[0] = '\0';
712
272545
	for (;;) {
713
272545
		i = BIO_gets(bp, buf, 254);
714
272545
		if (i <= 0)
715
			break;
716
717

3271098
		while ((i >= 0) && (buf[i] <= ' '))
718
545231
			i--;
719
272545
		buf[++i] = '\n';
720
272545
		buf[++i] = '\0';
721
722
272545
		if (buf[0] == '\n')
723
			break;
724
272539
		if (!BUF_MEM_grow(headerB, hl + i + 9)) {
725
			PEMerror(ERR_R_MALLOC_FAILURE);
726
			goto err;
727
		}
728
272539
		if (strncmp(buf, "-----END ", 9) == 0) {
729
			nohead = 1;
730
12776
			break;
731
		}
732
259763
		memcpy(&(headerB->data[hl]), buf, i);
733
259763
		headerB->data[hl + i] = '\0';
734
		hl += i;
735
	}
736
737
12782
	bl = 0;
738
12782
	if (!BUF_MEM_grow(dataB, 1024)) {
739
		PEMerror(ERR_R_MALLOC_FAILURE);
740
		goto err;
741
	}
742
12782
	dataB->data[0] = '\0';
743
12782
	if (!nohead) {
744
156
		for (;;) {
745
156
			i = BIO_gets(bp, buf, 254);
746
156
			if (i <= 0)
747
				break;
748
749

1872
			while ((i >= 0) && (buf[i] <= ' '))
750
312
				i--;
751
156
			buf[++i] = '\n';
752
156
			buf[++i] = '\0';
753
754
156
			if (i != 65)
755
6
				end = 1;
756
312
			if (strncmp(buf, "-----END ", 9) == 0)
757
				break;
758
156
			if (i > 65)
759
				break;
760
150
			if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
761
				PEMerror(ERR_R_MALLOC_FAILURE);
762
				goto err;
763
			}
764
150
			memcpy(&(dataB->data[bl]), buf, i);
765
150
			dataB->data[bl + i] = '\0';
766
150
			bl += i;
767
150
			if (end) {
768
				buf[0] = '\0';
769
				i = BIO_gets(bp, buf, 254);
770
				if (i <= 0)
771
					break;
772
773
				while ((i >= 0) && (buf[i] <= ' '))
774
					i--;
775
				buf[++i] = '\n';
776
				buf[++i] = '\0';
777
778
				break;
779
			}
780
		}
781
	} else {
782
		tmpB = headerB;
783
		headerB = dataB;
784
		dataB = tmpB;
785
12776
		bl = hl;
786
	}
787
12782
	i = strlen(nameB->data);
788

25564
	if ((strncmp(buf, "-----END ", 9) != 0) ||
789
12782
	    (strncmp(nameB->data, &(buf[9]), i) != 0) ||
790
12782
	    (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
791
		PEMerror(PEM_R_BAD_END_LINE);
792
		goto err;
793
	}
794
795
12782
	EVP_DecodeInit(&ctx);
796
12782
	i = EVP_DecodeUpdate(&ctx,
797
12782
	    (unsigned char *)dataB->data, &bl,
798
12782
	    (unsigned char *)dataB->data, bl);
799
12782
	if (i < 0) {
800
		PEMerror(PEM_R_BAD_BASE64_DECODE);
801
		goto err;
802
	}
803
12782
	i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
804
12782
	if (i < 0) {
805
		PEMerror(PEM_R_BAD_BASE64_DECODE);
806
		goto err;
807
	}
808
12782
	bl += k;
809
810
12782
	if (bl == 0)
811
		goto err;
812
12782
	*name = nameB->data;
813
12782
	*header = headerB->data;
814
12782
	*data = (unsigned char *)dataB->data;
815
12782
	*len = bl;
816
12782
	free(nameB);
817
12782
	free(headerB);
818
12782
	free(dataB);
819
12782
	return (1);
820
821
err:
822
417
	BUF_MEM_free(nameB);
823
417
	BUF_MEM_free(headerB);
824
417
	BUF_MEM_free(dataB);
825
417
	return (0);
826
13199
}
827
828
/* Check pem string and return prefix length.
829
 * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
830
 * the return value is 3 for the string "RSA".
831
 */
832
833
int
834
pem_check_suffix(const char *pem_str, const char *suffix)
835
{
836
2344
	int pem_len = strlen(pem_str);
837
1172
	int suffix_len = strlen(suffix);
838
	const char *p;
839
840
1172
	if (suffix_len + 1 >= pem_len)
841
192
		return 0;
842
980
	p = pem_str + pem_len - suffix_len;
843
980
	if (strcmp(p, suffix))
844
182
		return 0;
845
798
	p--;
846
798
	if (*p != ' ')
847
		return 0;
848
798
	return p - pem_str;
849
1172
}