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authorcvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
commitdecf84ba5550c1656a7fdb51b5b81969590c3f03 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libcrypto/pem/pem_lib.c
parent7a8f138352aa4eb7b65ac4b1a5fe7630fbee1427 (diff)
downloadopenbsd-libressl-v2.1.5.tar.gz
openbsd-libressl-v2.1.5.tar.bz2
openbsd-libressl-v2.1.5.zip
This commit was manufactured by cvs2git to create branch 'OPENBSD_5_7'.libressl-v2.1.5
Diffstat (limited to 'src/lib/libcrypto/pem/pem_lib.c')
-rw-r--r--src/lib/libcrypto/pem/pem_lib.c871
1 files changed, 0 insertions, 871 deletions
diff --git a/src/lib/libcrypto/pem/pem_lib.c b/src/lib/libcrypto/pem/pem_lib.c
deleted file mode 100644
index 48768a4467..0000000000
--- a/src/lib/libcrypto/pem/pem_lib.c
+++ /dev/null
@@ -1,871 +0,0 @@
1/* $OpenBSD: pem_lib.c,v 1.39 2015/02/11 04:05:14 beck 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
85static int load_iv(char **fromp, unsigned char *to, int num);
86static int check_pem(const char *nm, const char *name);
87int 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 */
90int
91PEM_def_callback(char *buf, int num, int w, void *key)
92{
93 size_t l;
94 int i;
95 const char *prompt;
96
97 if (key) {
98 l = strlen(key);
99 if (num < 0)
100 return -1;
101 if (l > (size_t)num)
102 l = (size_t)num;
103 memcpy(buf, key, l);
104 return (int)l;
105 }
106
107 prompt = EVP_get_pw_prompt();
108 if (prompt == NULL)
109 prompt = "Enter PEM pass phrase:";
110
111 for (;;) {
112 i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w);
113 if (i != 0) {
114 PEMerr(PEM_F_PEM_DEF_CALLBACK,
115 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}
129
130void
131PEM_proc_type(char *buf, int type)
132{
133 const char *str;
134
135 if (type == PEM_TYPE_ENCRYPTED)
136 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 strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
145 strlcat(buf, str, PEM_BUFSIZE);
146 strlcat(buf, "\n", PEM_BUFSIZE);
147}
148
149void
150PEM_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 strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
157 strlcat(buf, type, PEM_BUFSIZE);
158 strlcat(buf, ",", PEM_BUFSIZE);
159 j = strlen(buf);
160 if (j + (len * 2) + 1 > PEM_BUFSIZE)
161 return;
162 for (i = 0; i < len; i++) {
163 buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
164 buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
165 }
166 buf[j + i * 2] = '\n';
167 buf[j + i * 2 + 1] = '\0';
168}
169
170void *
171PEM_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 PEMerr(PEM_F_PEM_ASN1_READ, 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
187static int
188check_pem(const char *nm, const char *name)
189{
190 /* Normal matching nm and name */
191 if (!strcmp(nm, name))
192 return 1;
193
194 /* Make PEM_STRING_EVP_PKEY match any private key */
195
196 if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
197 int slen;
198 const EVP_PKEY_ASN1_METHOD *ameth;
199 if (!strcmp(nm, PEM_STRING_PKCS8))
200 return 1;
201 if (!strcmp(nm, PEM_STRING_PKCS8INF))
202 return 1;
203 slen = pem_check_suffix(nm, "PRIVATE KEY");
204 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 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
210 if (ameth && ameth->old_priv_decode)
211 return 1;
212 }
213 return 0;
214 }
215
216 if (!strcmp(name, PEM_STRING_PARAMETERS)) {
217 int slen;
218 const EVP_PKEY_ASN1_METHOD *ameth;
219 slen = pem_check_suffix(nm, "PARAMETERS");
220 if (slen > 0) {
221 ENGINE *e;
222 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
223 if (ameth) {
224 int r;
225 if (ameth->param_decode)
226 r = 1;
227 else
228 r = 0;
229#ifndef OPENSSL_NO_ENGINE
230 if (e)
231 ENGINE_finish(e);
232#endif
233 return r;
234 }
235 }
236 return 0;
237 }
238
239 /* Permit older strings */
240
241 if (!strcmp(nm, PEM_STRING_X509_OLD) &&
242 !strcmp(name, PEM_STRING_X509))
243 return 1;
244
245 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 if (!strcmp(nm, PEM_STRING_X509) &&
251 !strcmp(name, PEM_STRING_X509_TRUSTED))
252 return 1;
253
254 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 if (!strcmp(nm, PEM_STRING_X509) &&
260 !strcmp(name, PEM_STRING_PKCS7))
261 return 1;
262
263 if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
264 !strcmp(name, PEM_STRING_PKCS7))
265 return 1;
266
267#ifndef OPENSSL_NO_CMS
268 if (!strcmp(nm, PEM_STRING_X509) &&
269 !strcmp(name, PEM_STRING_CMS))
270 return 1;
271 /* Allow CMS to be read from PKCS#7 headers */
272 if (!strcmp(nm, PEM_STRING_PKCS7) &&
273 !strcmp(name, PEM_STRING_CMS))
274 return 1;
275#endif
276
277 return 0;
278}
279
280int
281PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
282 const char *name, BIO *bp, pem_password_cb *cb, void *u)
283{
284 EVP_CIPHER_INFO cipher;
285 char *nm = NULL, *header = NULL;
286 unsigned char *data = NULL;
287 long len;
288 int ret = 0;
289
290 for (;;) {
291 if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
292 if (ERR_GET_REASON(ERR_peek_error()) ==
293 PEM_R_NO_START_LINE)
294 ERR_asprintf_error_data("Expecting: %s", name);
295 return 0;
296 }
297 if (check_pem(nm, name))
298 break;
299 free(nm);
300 free(header);
301 free(data);
302 }
303 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
304 goto err;
305 if (!PEM_do_header(&cipher, data, &len, cb, u))
306 goto err;
307
308 *pdata = data;
309 *plen = len;
310
311 if (pnm)
312 *pnm = nm;
313
314 ret = 1;
315
316err:
317 if (!ret || !pnm)
318 free(nm);
319 free(header);
320 if (!ret)
321 free(data);
322 return ret;
323}
324
325int
326PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, void *x,
327 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
328 pem_password_cb *callback, void *u)
329{
330 BIO *b;
331 int ret;
332
333 if ((b = BIO_new(BIO_s_file())) == NULL) {
334 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
335 return (0);
336 }
337 BIO_set_fp(b, fp, BIO_NOCLOSE);
338 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
339 BIO_free(b);
340 return (ret);
341}
342
343int
344PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, void *x,
345 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
346 pem_password_cb *callback, void *u)
347{
348 EVP_CIPHER_CTX ctx;
349 int dsize = 0, i, j, ret = 0;
350 unsigned char *p, *data = NULL;
351 const char *objstr = NULL;
352 char buf[PEM_BUFSIZE];
353 unsigned char key[EVP_MAX_KEY_LENGTH];
354 unsigned char iv[EVP_MAX_IV_LENGTH];
355
356 if (enc != NULL) {
357 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
358 if (objstr == NULL) {
359 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,
360 PEM_R_UNSUPPORTED_CIPHER);
361 goto err;
362 }
363 }
364
365 if ((dsize = i2d(x, NULL)) < 0) {
366 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
367 dsize = 0;
368 goto err;
369 }
370 /* dzise + 8 bytes are needed */
371 /* actually it needs the cipher block size extra... */
372 data = malloc((unsigned int)dsize + 20);
373 if (data == NULL) {
374 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
375 goto err;
376 }
377 p = data;
378 i = i2d(x, &p);
379
380 if (enc != NULL) {
381 if (kstr == NULL) {
382 if (callback == NULL)
383 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
384 else
385 klen = (*callback)(buf, PEM_BUFSIZE, 1, u);
386 if (klen <= 0) {
387 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,
388 PEM_R_READ_KEY);
389 goto err;
390 }
391 kstr = (unsigned char *)buf;
392 }
393 if ((size_t)enc->iv_len > sizeof(iv)) {
394 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, EVP_R_IV_TOO_LARGE);
395 goto err;
396 }
397 arc4random_buf(iv, enc->iv_len); /* Generate a salt */
398 /* The 'iv' is used as the iv and as a salt. It is
399 * NOT taken from the BytesToKey function */
400 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1,
401 key, NULL))
402 goto err;
403
404 if (kstr == (unsigned char *)buf)
405 OPENSSL_cleanse(buf, PEM_BUFSIZE);
406
407 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 > sizeof buf) {
408 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,
409 ASN1_R_BUFFER_TOO_SMALL);
410 goto err;
411 }
412
413 buf[0] = '\0';
414 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
415 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
416 /* k=strlen(buf); */
417
418 EVP_CIPHER_CTX_init(&ctx);
419 ret = 1;
420 if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) ||
421 !EVP_EncryptUpdate(&ctx, data, &j, data, i) ||
422 !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i))
423 ret = 0;
424 EVP_CIPHER_CTX_cleanup(&ctx);
425 if (ret == 0)
426 goto err;
427 i += j;
428 } else {
429 ret = 1;
430 buf[0] = '\0';
431 }
432 i = PEM_write_bio(bp, name, buf, data, i);
433 if (i <= 0)
434 ret = 0;
435err:
436 OPENSSL_cleanse(key, sizeof(key));
437 OPENSSL_cleanse(iv, sizeof(iv));
438 OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
439 OPENSSL_cleanse(buf, PEM_BUFSIZE);
440 if (data != NULL) {
441 OPENSSL_cleanse(data, (unsigned int)dsize);
442 free(data);
443 }
444 return (ret);
445}
446
447int
448PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
449 pem_password_cb *callback, void *u)
450{
451 int i, j, o, klen;
452 long len;
453 EVP_CIPHER_CTX ctx;
454 unsigned char key[EVP_MAX_KEY_LENGTH];
455 char buf[PEM_BUFSIZE];
456
457 len = *plen;
458
459 if (cipher->cipher == NULL)
460 return (1);
461 if (callback == NULL)
462 klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
463 else
464 klen = callback(buf, PEM_BUFSIZE, 0, u);
465 if (klen <= 0) {
466 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
467 return (0);
468 }
469 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
470 (unsigned char *)buf, klen, 1, key, NULL))
471 return 0;
472
473 j = (int)len;
474 EVP_CIPHER_CTX_init(&ctx);
475 o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key,
476 &(cipher->iv[0]));
477 if (o)
478 o = EVP_DecryptUpdate(&ctx, data, &i, data, j);
479 if (o)
480 o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
481 EVP_CIPHER_CTX_cleanup(&ctx);
482 OPENSSL_cleanse((char *)buf, sizeof(buf));
483 OPENSSL_cleanse((char *)key, sizeof(key));
484 if (!o) {
485 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
486 return (0);
487 }
488 *plen = j + i;
489 return (1);
490}
491
492int
493PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
494{
495 const EVP_CIPHER *enc = NULL;
496 char *p, c;
497 char **header_pp = &header;
498
499 cipher->cipher = NULL;
500 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
501 return (1);
502 if (strncmp(header, "Proc-Type: ", 11) != 0) {
503 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
504 return (0);
505 }
506 header += 11;
507 if (*header != '4')
508 return (0);
509 header++;
510 if (*header != ',')
511 return (0);
512 header++;
513 if (strncmp(header, "ENCRYPTED", 9) != 0) {
514 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
515 return (0);
516 }
517 for (; (*header != '\n') && (*header != '\0'); header++)
518 ;
519 if (*header == '\0') {
520 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
521 return (0);
522 }
523 header++;
524 if (strncmp(header, "DEK-Info: ", 10) != 0) {
525 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
526 return (0);
527 }
528 header += 10;
529
530 p = header;
531 for (;;) {
532 c= *header;
533 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
534 ((c >= '0') && (c <= '9'))))
535 break;
536 header++;
537 }
538 *header = '\0';
539 cipher->cipher = enc = EVP_get_cipherbyname(p);
540 *header = c;
541 header++;
542
543 if (enc == NULL) {
544 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,
545 PEM_R_UNSUPPORTED_ENCRYPTION);
546 return (0);
547 }
548 if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
549 return (0);
550
551 return (1);
552}
553
554static int
555load_iv(char **fromp, unsigned char *to, int num)
556{
557 int v, i;
558 char *from;
559
560 from= *fromp;
561 for (i = 0; i < num; i++)
562 to[i] = 0;
563 num *= 2;
564 for (i = 0; i < num; i++) {
565 if ((*from >= '0') && (*from <= '9'))
566 v = *from - '0';
567 else if ((*from >= 'A') && (*from <= 'F'))
568 v = *from - 'A' + 10;
569 else if ((*from >= 'a') && (*from <= 'f'))
570 v = *from - 'a' + 10;
571 else {
572 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
573 return (0);
574 }
575 from++;
576 to[i / 2] |= v << (long)((!(i & 1)) * 4);
577 }
578
579 *fromp = from;
580 return (1);
581}
582
583int
584PEM_write(FILE *fp, char *name, char *header, unsigned char *data, long len)
585{
586 BIO *b;
587 int ret;
588
589 if ((b = BIO_new(BIO_s_file())) == NULL) {
590 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
591 return (0);
592 }
593 BIO_set_fp(b, fp, BIO_NOCLOSE);
594 ret = PEM_write_bio(b, name, header, data, len);
595 BIO_free(b);
596 return (ret);
597}
598
599int
600PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
601 long len)
602{
603 int nlen, n, i, j, outl;
604 unsigned char *buf = NULL;
605 EVP_ENCODE_CTX ctx;
606 int reason = ERR_R_BUF_LIB;
607
608 EVP_EncodeInit(&ctx);
609 nlen = strlen(name);
610
611 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
612 (BIO_write(bp, name, nlen) != nlen) ||
613 (BIO_write(bp, "-----\n", 6) != 6))
614 goto err;
615
616 i = strlen(header);
617 if (i > 0) {
618 if ((BIO_write(bp, header, i) != i) ||
619 (BIO_write(bp, "\n", 1) != 1))
620 goto err;
621 }
622
623 buf = reallocarray(NULL, PEM_BUFSIZE, 8);
624 if (buf == NULL) {
625 reason = ERR_R_MALLOC_FAILURE;
626 goto err;
627 }
628
629 i = j = 0;
630 while (len > 0) {
631 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
632 EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n);
633 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
634 goto err;
635 i += outl;
636 len -= n;
637 j += n;
638 }
639 EVP_EncodeFinal(&ctx, buf, &outl);
640 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
641 goto err;
642 OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
643 free(buf);
644 buf = NULL;
645 if ((BIO_write(bp, "-----END ", 9) != 9) ||
646 (BIO_write(bp, name, nlen) != nlen) ||
647 (BIO_write(bp, "-----\n", 6) != 6))
648 goto err;
649 return (i + outl);
650
651err:
652 if (buf) {
653 OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
654 free(buf);
655 }
656 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
657 return (0);
658}
659
660int
661PEM_read(FILE *fp, char **name, char **header, unsigned char **data, long *len)
662{
663 BIO *b;
664 int ret;
665
666 if ((b = BIO_new(BIO_s_file())) == NULL) {
667 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
668 return (0);
669 }
670 BIO_set_fp(b, fp, BIO_NOCLOSE);
671 ret = PEM_read_bio(b, name, header, data, len);
672 BIO_free(b);
673 return (ret);
674}
675
676int
677PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
678 long *len)
679{
680 EVP_ENCODE_CTX ctx;
681 int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
682 char buf[256];
683 BUF_MEM *nameB;
684 BUF_MEM *headerB;
685 BUF_MEM *dataB, *tmpB;
686
687 nameB = BUF_MEM_new();
688 headerB = BUF_MEM_new();
689 dataB = BUF_MEM_new();
690 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
691 BUF_MEM_free(nameB);
692 BUF_MEM_free(headerB);
693 BUF_MEM_free(dataB);
694 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
695 return (0);
696 }
697
698 buf[254] = '\0';
699 for (;;) {
700 i = BIO_gets(bp, buf, 254);
701
702 if (i <= 0) {
703 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE);
704 goto err;
705 }
706
707 while ((i >= 0) && (buf[i] <= ' '))
708 i--;
709 buf[++i] = '\n';
710 buf[++i] = '\0';
711
712 if (strncmp(buf, "-----BEGIN ", 11) == 0) {
713 i = strlen(&(buf[11]));
714
715 if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
716 continue;
717 if (!BUF_MEM_grow(nameB, i + 9)) {
718 PEMerr(PEM_F_PEM_READ_BIO,
719 ERR_R_MALLOC_FAILURE);
720 goto err;
721 }
722 memcpy(nameB->data, &(buf[11]), i - 6);
723 nameB->data[i - 6] = '\0';
724 break;
725 }
726 }
727 hl = 0;
728 if (!BUF_MEM_grow(headerB, 256)) {
729 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
730 goto err;
731 }
732 headerB->data[0] = '\0';
733 for (;;) {
734 i = BIO_gets(bp, buf, 254);
735 if (i <= 0)
736 break;
737
738 while ((i >= 0) && (buf[i] <= ' '))
739 i--;
740 buf[++i] = '\n';
741 buf[++i] = '\0';
742
743 if (buf[0] == '\n')
744 break;
745 if (!BUF_MEM_grow(headerB, hl + i + 9)) {
746 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
747 goto err;
748 }
749 if (strncmp(buf, "-----END ", 9) == 0) {
750 nohead = 1;
751 break;
752 }
753 memcpy(&(headerB->data[hl]), buf, i);
754 headerB->data[hl + i] = '\0';
755 hl += i;
756 }
757
758 bl = 0;
759 if (!BUF_MEM_grow(dataB, 1024)) {
760 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
761 goto err;
762 }
763 dataB->data[0] = '\0';
764 if (!nohead) {
765 for (;;) {
766 i = BIO_gets(bp, buf, 254);
767 if (i <= 0)
768 break;
769
770 while ((i >= 0) && (buf[i] <= ' '))
771 i--;
772 buf[++i] = '\n';
773 buf[++i] = '\0';
774
775 if (i != 65)
776 end = 1;
777 if (strncmp(buf, "-----END ", 9) == 0)
778 break;
779 if (i > 65)
780 break;
781 if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
782 PEMerr(PEM_F_PEM_READ_BIO,
783 ERR_R_MALLOC_FAILURE);
784 goto err;
785 }
786 memcpy(&(dataB->data[bl]), buf, i);
787 dataB->data[bl + i] = '\0';
788 bl += i;
789 if (end) {
790 buf[0] = '\0';
791 i = BIO_gets(bp, buf, 254);
792 if (i <= 0)
793 break;
794
795 while ((i >= 0) && (buf[i] <= ' '))
796 i--;
797 buf[++i] = '\n';
798 buf[++i] = '\0';
799
800 break;
801 }
802 }
803 } else {
804 tmpB = headerB;
805 headerB = dataB;
806 dataB = tmpB;
807 bl = hl;
808 }
809 i = strlen(nameB->data);
810 if ((strncmp(buf, "-----END ", 9) != 0) ||
811 (strncmp(nameB->data, &(buf[9]), i) != 0) ||
812 (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
813 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE);
814 goto err;
815 }
816
817 EVP_DecodeInit(&ctx);
818 i = EVP_DecodeUpdate(&ctx,
819 (unsigned char *)dataB->data, &bl,
820 (unsigned char *)dataB->data, bl);
821 if (i < 0) {
822 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
823 goto err;
824 }
825 i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
826 if (i < 0) {
827 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
828 goto err;
829 }
830 bl += k;
831
832 if (bl == 0)
833 goto err;
834 *name = nameB->data;
835 *header = headerB->data;
836 *data = (unsigned char *)dataB->data;
837 *len = bl;
838 free(nameB);
839 free(headerB);
840 free(dataB);
841 return (1);
842
843err:
844 BUF_MEM_free(nameB);
845 BUF_MEM_free(headerB);
846 BUF_MEM_free(dataB);
847 return (0);
848}
849
850/* Check pem string and return prefix length.
851 * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
852 * the return value is 3 for the string "RSA".
853 */
854
855int
856pem_check_suffix(const char *pem_str, const char *suffix)
857{
858 int pem_len = strlen(pem_str);
859 int suffix_len = strlen(suffix);
860 const char *p;
861
862 if (suffix_len + 1 >= pem_len)
863 return 0;
864 p = pem_str + pem_len - suffix_len;
865 if (strcmp(p, suffix))
866 return 0;
867 p--;
868 if (*p != ' ')
869 return 0;
870 return p - pem_str;
871}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 06:38:23 +0000