source: EcnlProtoTool/trunk/openssl-1.1.0e/crypto/pem/pem_lib.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 23.5 KB
Line 
1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (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 <stdio.h>
11#include <ctype.h>
12#include <string.h>
13#include "internal/cryptlib.h"
14#include <openssl/buffer.h>
15#include <openssl/objects.h>
16#include <openssl/evp.h>
17#include <openssl/rand.h>
18#include <openssl/x509.h>
19#include <openssl/pem.h>
20#include <openssl/pkcs12.h>
21#include "internal/asn1_int.h"
22#include <openssl/des.h>
23#include <openssl/engine.h>
24
25#define MIN_LENGTH 4
26
27static int load_iv(char **fromp, unsigned char *to, int num);
28static int check_pem(const char *nm, const char *name);
29int pem_check_suffix(const char *pem_str, const char *suffix);
30
31int PEM_def_callback(char *buf, int num, int w, void *key)
32{
33#if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI)
34 int i;
35#else
36 int i, j;
37 const char *prompt;
38#endif
39
40 if (key) {
41 i = strlen(key);
42 i = (i > num) ? num : i;
43 memcpy(buf, key, i);
44 return i;
45 }
46
47#if defined(OPENSSL_NO_STDIO) || defined(OPENSSL_NO_UI)
48 PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
49 return -1;
50#else
51 prompt = EVP_get_pw_prompt();
52 if (prompt == NULL)
53 prompt = "Enter PEM pass phrase:";
54
55 for (;;) {
56 /*
57 * We assume that w == 0 means decryption,
58 * while w == 1 means encryption
59 */
60 int min_len = w ? MIN_LENGTH : 0;
61
62 i = EVP_read_pw_string_min(buf, min_len, num, prompt, w);
63 if (i != 0) {
64 PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
65 memset(buf, 0, (unsigned int)num);
66 return -1;
67 }
68 j = strlen(buf);
69 if (min_len && j < min_len) {
70 fprintf(stderr,
71 "phrase is too short, needs to be at least %d chars\n",
72 min_len);
73 } else
74 break;
75 }
76 return j;
77#endif
78}
79
80void PEM_proc_type(char *buf, int type)
81{
82 const char *str;
83
84 if (type == PEM_TYPE_ENCRYPTED)
85 str = "ENCRYPTED";
86 else if (type == PEM_TYPE_MIC_CLEAR)
87 str = "MIC-CLEAR";
88 else if (type == PEM_TYPE_MIC_ONLY)
89 str = "MIC-ONLY";
90 else
91 str = "BAD-TYPE";
92
93 OPENSSL_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
94 OPENSSL_strlcat(buf, str, PEM_BUFSIZE);
95 OPENSSL_strlcat(buf, "\n", PEM_BUFSIZE);
96}
97
98void PEM_dek_info(char *buf, const char *type, int len, char *str)
99{
100 static const unsigned char map[17] = "0123456789ABCDEF";
101 long i;
102 int j;
103
104 OPENSSL_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
105 OPENSSL_strlcat(buf, type, PEM_BUFSIZE);
106 OPENSSL_strlcat(buf, ",", PEM_BUFSIZE);
107 j = strlen(buf);
108 if (j + (len * 2) + 1 > PEM_BUFSIZE)
109 return;
110 for (i = 0; i < len; i++) {
111 buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
112 buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
113 }
114 buf[j + i * 2] = '\n';
115 buf[j + i * 2 + 1] = '\0';
116}
117
118#ifndef OPENSSL_NO_STDIO
119void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
120 pem_password_cb *cb, void *u)
121{
122 BIO *b;
123 void *ret;
124
125 if ((b = BIO_new(BIO_s_file())) == NULL) {
126 PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
127 return (0);
128 }
129 BIO_set_fp(b, fp, BIO_NOCLOSE);
130 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
131 BIO_free(b);
132 return (ret);
133}
134#endif
135
136static int check_pem(const char *nm, const char *name)
137{
138 /* Normal matching nm and name */
139 if (strcmp(nm, name) == 0)
140 return 1;
141
142 /* Make PEM_STRING_EVP_PKEY match any private key */
143
144 if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) {
145 int slen;
146 const EVP_PKEY_ASN1_METHOD *ameth;
147 if (strcmp(nm, PEM_STRING_PKCS8) == 0)
148 return 1;
149 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0)
150 return 1;
151 slen = pem_check_suffix(nm, "PRIVATE KEY");
152 if (slen > 0) {
153 /*
154 * NB: ENGINE implementations won't contain a deprecated old
155 * private key decode function so don't look for them.
156 */
157 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
158 if (ameth && ameth->old_priv_decode)
159 return 1;
160 }
161 return 0;
162 }
163
164 if (strcmp(name, PEM_STRING_PARAMETERS) == 0) {
165 int slen;
166 const EVP_PKEY_ASN1_METHOD *ameth;
167 slen = pem_check_suffix(nm, "PARAMETERS");
168 if (slen > 0) {
169 ENGINE *e;
170 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
171 if (ameth) {
172 int r;
173 if (ameth->param_decode)
174 r = 1;
175 else
176 r = 0;
177#ifndef OPENSSL_NO_ENGINE
178 ENGINE_finish(e);
179#endif
180 return r;
181 }
182 }
183 return 0;
184 }
185 /* If reading DH parameters handle X9.42 DH format too */
186 if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0
187 && strcmp(name, PEM_STRING_DHPARAMS) == 0)
188 return 1;
189
190 /* Permit older strings */
191
192 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
193 && strcmp(name, PEM_STRING_X509) == 0)
194 return 1;
195
196 if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0
197 && strcmp(name, PEM_STRING_X509_REQ) == 0)
198 return 1;
199
200 /* Allow normal certs to be read as trusted certs */
201 if (strcmp(nm, PEM_STRING_X509) == 0
202 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
203 return 1;
204
205 if (strcmp(nm, PEM_STRING_X509_OLD) == 0
206 && strcmp(name, PEM_STRING_X509_TRUSTED) == 0)
207 return 1;
208
209 /* Some CAs use PKCS#7 with CERTIFICATE headers */
210 if (strcmp(nm, PEM_STRING_X509) == 0
211 && strcmp(name, PEM_STRING_PKCS7) == 0)
212 return 1;
213
214 if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0
215 && strcmp(name, PEM_STRING_PKCS7) == 0)
216 return 1;
217
218#ifndef OPENSSL_NO_CMS
219 if (strcmp(nm, PEM_STRING_X509) == 0
220 && strcmp(name, PEM_STRING_CMS) == 0)
221 return 1;
222 /* Allow CMS to be read from PKCS#7 headers */
223 if (strcmp(nm, PEM_STRING_PKCS7) == 0
224 && strcmp(name, PEM_STRING_CMS) == 0)
225 return 1;
226#endif
227
228 return 0;
229}
230
231int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
232 const char *name, BIO *bp, pem_password_cb *cb,
233 void *u)
234{
235 EVP_CIPHER_INFO cipher;
236 char *nm = NULL, *header = NULL;
237 unsigned char *data = NULL;
238 long len;
239 int ret = 0;
240
241 for (;;) {
242 if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
243 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
244 ERR_add_error_data(2, "Expecting: ", name);
245 return 0;
246 }
247 if (check_pem(nm, name))
248 break;
249 OPENSSL_free(nm);
250 OPENSSL_free(header);
251 OPENSSL_free(data);
252 }
253 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
254 goto err;
255 if (!PEM_do_header(&cipher, data, &len, cb, u))
256 goto err;
257
258 *pdata = data;
259 *plen = len;
260
261 if (pnm)
262 *pnm = nm;
263
264 ret = 1;
265
266 err:
267 if (!ret || !pnm)
268 OPENSSL_free(nm);
269 OPENSSL_free(header);
270 if (!ret)
271 OPENSSL_free(data);
272 return ret;
273}
274
275#ifndef OPENSSL_NO_STDIO
276int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
277 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
278 int klen, pem_password_cb *callback, void *u)
279{
280 BIO *b;
281 int ret;
282
283 if ((b = BIO_new(BIO_s_file())) == NULL) {
284 PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
285 return (0);
286 }
287 BIO_set_fp(b, fp, BIO_NOCLOSE);
288 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
289 BIO_free(b);
290 return (ret);
291}
292#endif
293
294int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
295 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
296 int klen, pem_password_cb *callback, void *u)
297{
298 EVP_CIPHER_CTX *ctx = NULL;
299 int dsize = 0, i = 0, j = 0, ret = 0;
300 unsigned char *p, *data = NULL;
301 const char *objstr = NULL;
302 char buf[PEM_BUFSIZE];
303 unsigned char key[EVP_MAX_KEY_LENGTH];
304 unsigned char iv[EVP_MAX_IV_LENGTH];
305
306 if (enc != NULL) {
307 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
308 if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0) {
309 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
310 goto err;
311 }
312 }
313
314 if ((dsize = i2d(x, NULL)) < 0) {
315 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
316 dsize = 0;
317 goto err;
318 }
319 /* dzise + 8 bytes are needed */
320 /* actually it needs the cipher block size extra... */
321 data = OPENSSL_malloc((unsigned int)dsize + 20);
322 if (data == NULL) {
323 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
324 goto err;
325 }
326 p = data;
327 i = i2d(x, &p);
328
329 if (enc != NULL) {
330 if (kstr == NULL) {
331 if (callback == NULL)
332 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
333 else
334 klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
335 if (klen <= 0) {
336 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
337 goto err;
338 }
339#ifdef CHARSET_EBCDIC
340 /* Convert the pass phrase from EBCDIC */
341 ebcdic2ascii(buf, buf, klen);
342#endif
343 kstr = (unsigned char *)buf;
344 }
345 RAND_add(data, i, 0); /* put in the RSA key. */
346 OPENSSL_assert(EVP_CIPHER_iv_length(enc) <= (int)sizeof(iv));
347 if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */
348 goto err;
349 /*
350 * The 'iv' is used as the iv and as a salt. It is NOT taken from
351 * the BytesToKey function
352 */
353 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
354 goto err;
355
356 if (kstr == (unsigned char *)buf)
357 OPENSSL_cleanse(buf, PEM_BUFSIZE);
358
359 OPENSSL_assert(strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13
360 <= sizeof buf);
361
362 buf[0] = '\0';
363 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
364 PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv);
365 /* k=strlen(buf); */
366
367 ret = 1;
368 if ((ctx = EVP_CIPHER_CTX_new()) == NULL
369 || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv)
370 || !EVP_EncryptUpdate(ctx, data, &j, data, i)
371 || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i))
372 ret = 0;
373 if (ret == 0)
374 goto err;
375 i += j;
376 } else {
377 ret = 1;
378 buf[0] = '\0';
379 }
380 i = PEM_write_bio(bp, name, buf, data, i);
381 if (i <= 0)
382 ret = 0;
383 err:
384 OPENSSL_cleanse(key, sizeof(key));
385 OPENSSL_cleanse(iv, sizeof(iv));
386 EVP_CIPHER_CTX_free(ctx);
387 OPENSSL_cleanse(buf, PEM_BUFSIZE);
388 OPENSSL_clear_free(data, (unsigned int)dsize);
389 return (ret);
390}
391
392int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
393 pem_password_cb *callback, void *u)
394{
395 int ok;
396 int keylen;
397 long len = *plen;
398 int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */
399 EVP_CIPHER_CTX *ctx;
400 unsigned char key[EVP_MAX_KEY_LENGTH];
401 char buf[PEM_BUFSIZE];
402
403#if LONG_MAX > INT_MAX
404 /* Check that we did not truncate the length */
405 if (len > INT_MAX) {
406 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG);
407 return 0;
408 }
409#endif
410
411 if (cipher->cipher == NULL)
412 return 1;
413 if (callback == NULL)
414 keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
415 else
416 keylen = callback(buf, PEM_BUFSIZE, 0, u);
417 if (keylen <= 0) {
418 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
419 return 0;
420 }
421#ifdef CHARSET_EBCDIC
422 /* Convert the pass phrase from EBCDIC */
423 ebcdic2ascii(buf, buf, keylen);
424#endif
425
426 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
427 (unsigned char *)buf, keylen, 1, key, NULL))
428 return 0;
429
430 ctx = EVP_CIPHER_CTX_new();
431 if (ctx == NULL)
432 return 0;
433
434 ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
435 if (ok)
436 ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen);
437 if (ok) {
438 /* Squirrel away the length of data decrypted so far. */
439 *plen = ilen;
440 ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen);
441 }
442 if (ok)
443 *plen += ilen;
444 else
445 PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
446
447 EVP_CIPHER_CTX_free(ctx);
448 OPENSSL_cleanse((char *)buf, sizeof(buf));
449 OPENSSL_cleanse((char *)key, sizeof(key));
450 return ok;
451}
452
453/*
454 * This implements a very limited PEM header parser that does not support the
455 * full grammar of rfc1421. In particular, folded headers are not supported,
456 * nor is additional whitespace.
457 *
458 * A robust implementation would make use of a library that turns the headers
459 * into a BIO from which one folded line is read at a time, and is then split
460 * into a header label and content. We would then parse the content of the
461 * headers we care about. This is overkill for just this limited use-case, but
462 * presumably we also parse rfc822-style headers for S/MIME, so a common
463 * abstraction might well be more generally useful.
464 */
465int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
466{
467 static const char ProcType[] = "Proc-Type:";
468 static const char ENCRYPTED[] = "ENCRYPTED";
469 static const char DEKInfo[] = "DEK-Info:";
470 const EVP_CIPHER *enc = NULL;
471 int ivlen;
472 char *dekinfostart, c;
473
474 cipher->cipher = NULL;
475 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
476 return 1;
477
478 if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) {
479 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
480 return 0;
481 }
482 header += sizeof(ProcType)-1;
483 header += strspn(header, " \t");
484
485 if (*header++ != '4' || *header++ != ',')
486 return 0;
487 header += strspn(header, " \t");
488
489 /* We expect "ENCRYPTED" followed by optional white-space + line break */
490 if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 ||
491 strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) {
492 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
493 return 0;
494 }
495 header += sizeof(ENCRYPTED)-1;
496 header += strspn(header, " \t\r");
497 if (*header++ != '\n') {
498 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
499 return 0;
500 }
501
502 /*-
503 * https://tools.ietf.org/html/rfc1421#section-4.6.1.3
504 * We expect "DEK-Info: algo[,hex-parameters]"
505 */
506 if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) {
507 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
508 return 0;
509 }
510 header += sizeof(DEKInfo)-1;
511 header += strspn(header, " \t");
512
513 /*
514 * DEK-INFO is a comma-separated combination of algorithm name and optional
515 * parameters.
516 */
517 dekinfostart = header;
518 header += strcspn(header, " \t,");
519 c = *header;
520 *header = '\0';
521 cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart);
522 *header = c;
523 header += strspn(header, " \t");
524
525 if (enc == NULL) {
526 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
527 return 0;
528 }
529 ivlen = EVP_CIPHER_iv_length(enc);
530 if (ivlen > 0 && *header++ != ',') {
531 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV);
532 return 0;
533 } else if (ivlen == 0 && *header == ',') {
534 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV);
535 return 0;
536 }
537
538 if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc)))
539 return 0;
540
541 return 1;
542}
543
544static int load_iv(char **fromp, unsigned char *to, int num)
545{
546 int v, i;
547 char *from;
548
549 from = *fromp;
550 for (i = 0; i < num; i++)
551 to[i] = 0;
552 num *= 2;
553 for (i = 0; i < num; i++) {
554 v = OPENSSL_hexchar2int(*from);
555 if (v < 0) {
556 PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
557 return (0);
558 }
559 from++;
560 to[i / 2] |= v << (long)((!(i & 1)) * 4);
561 }
562
563 *fromp = from;
564 return (1);
565}
566
567#ifndef OPENSSL_NO_STDIO
568int PEM_write(FILE *fp, const char *name, const char *header,
569 const unsigned char *data, long len)
570{
571 BIO *b;
572 int ret;
573
574 if ((b = BIO_new(BIO_s_file())) == NULL) {
575 PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
576 return (0);
577 }
578 BIO_set_fp(b, fp, BIO_NOCLOSE);
579 ret = PEM_write_bio(b, name, header, data, len);
580 BIO_free(b);
581 return (ret);
582}
583#endif
584
585int PEM_write_bio(BIO *bp, const char *name, const char *header,
586 const unsigned char *data, long len)
587{
588 int nlen, n, i, j, outl;
589 unsigned char *buf = NULL;
590 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
591 int reason = ERR_R_BUF_LIB;
592
593 if (ctx == NULL) {
594 reason = ERR_R_MALLOC_FAILURE;
595 goto err;
596 }
597
598 EVP_EncodeInit(ctx);
599 nlen = strlen(name);
600
601 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
602 (BIO_write(bp, name, nlen) != nlen) ||
603 (BIO_write(bp, "-----\n", 6) != 6))
604 goto err;
605
606 i = strlen(header);
607 if (i > 0) {
608 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
609 goto err;
610 }
611
612 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
613 if (buf == NULL) {
614 reason = ERR_R_MALLOC_FAILURE;
615 goto err;
616 }
617
618 i = j = 0;
619 while (len > 0) {
620 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
621 if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n))
622 goto err;
623 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
624 goto err;
625 i += outl;
626 len -= n;
627 j += n;
628 }
629 EVP_EncodeFinal(ctx, buf, &outl);
630 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
631 goto err;
632 if ((BIO_write(bp, "-----END ", 9) != 9) ||
633 (BIO_write(bp, name, nlen) != nlen) ||
634 (BIO_write(bp, "-----\n", 6) != 6))
635 goto err;
636 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
637 EVP_ENCODE_CTX_free(ctx);
638 return (i + outl);
639 err:
640 OPENSSL_clear_free(buf, PEM_BUFSIZE * 8);
641 EVP_ENCODE_CTX_free(ctx);
642 PEMerr(PEM_F_PEM_WRITE_BIO, reason);
643 return (0);
644}
645
646#ifndef OPENSSL_NO_STDIO
647int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
648 long *len)
649{
650 BIO *b;
651 int ret;
652
653 if ((b = BIO_new(BIO_s_file())) == NULL) {
654 PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
655 return (0);
656 }
657 BIO_set_fp(b, fp, BIO_NOCLOSE);
658 ret = PEM_read_bio(b, name, header, data, len);
659 BIO_free(b);
660 return (ret);
661}
662#endif
663
664int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
665 long *len)
666{
667 EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new();
668 int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
669 char buf[256];
670 BUF_MEM *nameB;
671 BUF_MEM *headerB;
672 BUF_MEM *dataB, *tmpB;
673
674 if (ctx == NULL) {
675 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
676 return (0);
677 }
678
679 nameB = BUF_MEM_new();
680 headerB = BUF_MEM_new();
681 dataB = BUF_MEM_new();
682 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
683 goto err;
684 }
685
686 buf[254] = '\0';
687 for (;;) {
688 i = BIO_gets(bp, buf, 254);
689
690 if (i <= 0) {
691 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE);
692 goto err;
693 }
694
695 while ((i >= 0) && (buf[i] <= ' '))
696 i--;
697 buf[++i] = '\n';
698 buf[++i] = '\0';
699
700 if (strncmp(buf, "-----BEGIN ", 11) == 0) {
701 i = strlen(&(buf[11]));
702
703 if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
704 continue;
705 if (!BUF_MEM_grow(nameB, i + 9)) {
706 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
707 goto err;
708 }
709 memcpy(nameB->data, &(buf[11]), i - 6);
710 nameB->data[i - 6] = '\0';
711 break;
712 }
713 }
714 hl = 0;
715 if (!BUF_MEM_grow(headerB, 256)) {
716 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
717 goto err;
718 }
719 headerB->data[0] = '\0';
720 for (;;) {
721 i = BIO_gets(bp, buf, 254);
722 if (i <= 0)
723 break;
724
725 while ((i >= 0) && (buf[i] <= ' '))
726 i--;
727 buf[++i] = '\n';
728 buf[++i] = '\0';
729
730 if (buf[0] == '\n')
731 break;
732 if (!BUF_MEM_grow(headerB, hl + i + 9)) {
733 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
734 goto err;
735 }
736 if (strncmp(buf, "-----END ", 9) == 0) {
737 nohead = 1;
738 break;
739 }
740 memcpy(&(headerB->data[hl]), buf, i);
741 headerB->data[hl + i] = '\0';
742 hl += i;
743 }
744
745 bl = 0;
746 if (!BUF_MEM_grow(dataB, 1024)) {
747 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
748 goto err;
749 }
750 dataB->data[0] = '\0';
751 if (!nohead) {
752 for (;;) {
753 i = BIO_gets(bp, buf, 254);
754 if (i <= 0)
755 break;
756
757 while ((i >= 0) && (buf[i] <= ' '))
758 i--;
759 buf[++i] = '\n';
760 buf[++i] = '\0';
761
762 if (i != 65)
763 end = 1;
764 if (strncmp(buf, "-----END ", 9) == 0)
765 break;
766 if (i > 65)
767 break;
768 if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
769 PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
770 goto err;
771 }
772 memcpy(&(dataB->data[bl]), buf, i);
773 dataB->data[bl + i] = '\0';
774 bl += i;
775 if (end) {
776 buf[0] = '\0';
777 i = BIO_gets(bp, buf, 254);
778 if (i <= 0)
779 break;
780
781 while ((i >= 0) && (buf[i] <= ' '))
782 i--;
783 buf[++i] = '\n';
784 buf[++i] = '\0';
785
786 break;
787 }
788 }
789 } else {
790 tmpB = headerB;
791 headerB = dataB;
792 dataB = tmpB;
793 bl = hl;
794 }
795 i = strlen(nameB->data);
796 if ((strncmp(buf, "-----END ", 9) != 0) ||
797 (strncmp(nameB->data, &(buf[9]), i) != 0) ||
798 (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
799 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE);
800 goto err;
801 }
802
803 EVP_DecodeInit(ctx);
804 i = EVP_DecodeUpdate(ctx,
805 (unsigned char *)dataB->data, &bl,
806 (unsigned char *)dataB->data, bl);
807 if (i < 0) {
808 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
809 goto err;
810 }
811 i = EVP_DecodeFinal(ctx, (unsigned char *)&(dataB->data[bl]), &k);
812 if (i < 0) {
813 PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
814 goto err;
815 }
816 bl += k;
817
818 if (bl == 0)
819 goto err;
820 *name = nameB->data;
821 *header = headerB->data;
822 *data = (unsigned char *)dataB->data;
823 *len = bl;
824 OPENSSL_free(nameB);
825 OPENSSL_free(headerB);
826 OPENSSL_free(dataB);
827 EVP_ENCODE_CTX_free(ctx);
828 return (1);
829 err:
830 BUF_MEM_free(nameB);
831 BUF_MEM_free(headerB);
832 BUF_MEM_free(dataB);
833 EVP_ENCODE_CTX_free(ctx);
834 return (0);
835}
836
837/*
838 * Check pem string and return prefix length. If for example the pem_str ==
839 * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
840 * string "RSA".
841 */
842
843int pem_check_suffix(const char *pem_str, const char *suffix)
844{
845 int pem_len = strlen(pem_str);
846 int suffix_len = strlen(suffix);
847 const char *p;
848 if (suffix_len + 1 >= pem_len)
849 return 0;
850 p = pem_str + pem_len - suffix_len;
851 if (strcmp(p, suffix))
852 return 0;
853 p--;
854 if (*p != ' ')
855 return 0;
856 return p - pem_str;
857}
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