1 /* crypto/pem/pem_lib.c */
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 #include <assert.h>
59 #include <ctype.h>
60 #include <stdio.h>
61 #include <string.h>
62
63 #include <openssl/base64.h>
64 #include <openssl/buf.h>
65 #include <openssl/des.h>
66 #include <openssl/err.h>
67 #include <openssl/evp.h>
68 #include <openssl/mem.h>
69 #include <openssl/obj.h>
70 #include <openssl/pem.h>
71 #include <openssl/rand.h>
72 #include <openssl/x509.h>
73
74 #include "../internal.h"
75
76
77 #define MIN_LENGTH 4
78
79 static int load_iv(char **fromp, unsigned char *to, int num);
80 static int check_pem(const char *nm, const char *name);
81
PEM_proc_type(char * buf,int type)82 void PEM_proc_type(char *buf, int type)
83 {
84 const char *str;
85
86 if (type == PEM_TYPE_ENCRYPTED)
87 str = "ENCRYPTED";
88 else if (type == PEM_TYPE_MIC_CLEAR)
89 str = "MIC-CLEAR";
90 else if (type == PEM_TYPE_MIC_ONLY)
91 str = "MIC-ONLY";
92 else
93 str = "BAD-TYPE";
94
95 BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
96 BUF_strlcat(buf, str, PEM_BUFSIZE);
97 BUF_strlcat(buf, "\n", PEM_BUFSIZE);
98 }
99
PEM_dek_info(char * buf,const char * type,int len,char * str)100 void PEM_dek_info(char *buf, const char *type, int len, char *str)
101 {
102 static const unsigned char map[17] = "0123456789ABCDEF";
103 long i;
104 int j;
105
106 BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
107 BUF_strlcat(buf, type, PEM_BUFSIZE);
108 BUF_strlcat(buf, ",", PEM_BUFSIZE);
109 j = strlen(buf);
110 if (j + (len * 2) + 1 > PEM_BUFSIZE)
111 return;
112 for (i = 0; i < len; i++) {
113 buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
114 buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
115 }
116 buf[j + i * 2] = '\n';
117 buf[j + i * 2 + 1] = '\0';
118 }
119
120 #ifndef OPENSSL_NO_FP_API
PEM_ASN1_read(d2i_of_void * d2i,const char * name,FILE * fp,void ** x,pem_password_cb * cb,void * u)121 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
122 pem_password_cb *cb, void *u)
123 {
124 BIO *b;
125 void *ret;
126
127 if ((b = BIO_new(BIO_s_file())) == NULL) {
128 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
129 return (0);
130 }
131 BIO_set_fp(b, fp, BIO_NOCLOSE);
132 ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
133 BIO_free(b);
134 return (ret);
135 }
136 #endif
137
check_pem(const char * nm,const char * name)138 static int check_pem(const char *nm, const char *name)
139 {
140 /* Normal matching nm and name */
141 if (!strcmp(nm, name))
142 return 1;
143
144 /* Make PEM_STRING_EVP_PKEY match any private key */
145
146 if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
147 return !strcmp(nm, PEM_STRING_PKCS8) ||
148 !strcmp(nm, PEM_STRING_PKCS8INF) ||
149 !strcmp(nm, PEM_STRING_RSA) ||
150 !strcmp(nm, PEM_STRING_EC) ||
151 !strcmp(nm, PEM_STRING_DSA);
152 }
153
154 /* Permit older strings */
155
156 if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509))
157 return 1;
158
159 if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
160 !strcmp(name, PEM_STRING_X509_REQ))
161 return 1;
162
163 /* Allow normal certs to be read as trusted certs */
164 if (!strcmp(nm, PEM_STRING_X509) &&
165 !strcmp(name, PEM_STRING_X509_TRUSTED))
166 return 1;
167
168 if (!strcmp(nm, PEM_STRING_X509_OLD) &&
169 !strcmp(name, PEM_STRING_X509_TRUSTED))
170 return 1;
171
172 /* Some CAs use PKCS#7 with CERTIFICATE headers */
173 if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7))
174 return 1;
175
176 if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
177 !strcmp(name, PEM_STRING_PKCS7))
178 return 1;
179
180 #ifndef OPENSSL_NO_CMS
181 if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_CMS))
182 return 1;
183 /* Allow CMS to be read from PKCS#7 headers */
184 if (!strcmp(nm, PEM_STRING_PKCS7) && !strcmp(name, PEM_STRING_CMS))
185 return 1;
186 #endif
187
188 return 0;
189 }
190
PEM_bytes_read_bio(unsigned char ** pdata,long * plen,char ** pnm,const char * name,BIO * bp,pem_password_cb * cb,void * u)191 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
192 const char *name, BIO *bp, pem_password_cb *cb,
193 void *u)
194 {
195 EVP_CIPHER_INFO cipher;
196 char *nm = NULL, *header = NULL;
197 unsigned char *data = NULL;
198 long len;
199 int ret = 0;
200
201 for (;;) {
202 if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
203 if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
204 ERR_add_error_data(2, "Expecting: ", name);
205 return 0;
206 }
207 if (check_pem(nm, name))
208 break;
209 OPENSSL_free(nm);
210 OPENSSL_free(header);
211 OPENSSL_free(data);
212 }
213 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
214 goto err;
215 if (!PEM_do_header(&cipher, data, &len, cb, u))
216 goto err;
217
218 *pdata = data;
219 *plen = len;
220
221 if (pnm)
222 *pnm = nm;
223
224 ret = 1;
225
226 err:
227 if (!ret || !pnm)
228 OPENSSL_free(nm);
229 OPENSSL_free(header);
230 if (!ret)
231 OPENSSL_free(data);
232 return ret;
233 }
234
235 #ifndef OPENSSL_NO_FP_API
PEM_ASN1_write(i2d_of_void * i2d,const char * name,FILE * fp,void * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * callback,void * u)236 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
237 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
238 int klen, pem_password_cb *callback, void *u)
239 {
240 BIO *b;
241 int ret;
242
243 if ((b = BIO_new(BIO_s_file())) == NULL) {
244 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
245 return (0);
246 }
247 BIO_set_fp(b, fp, BIO_NOCLOSE);
248 ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
249 BIO_free(b);
250 return (ret);
251 }
252 #endif
253
PEM_ASN1_write_bio(i2d_of_void * i2d,const char * name,BIO * bp,void * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * callback,void * u)254 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
255 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
256 int klen, pem_password_cb *callback, void *u)
257 {
258 EVP_CIPHER_CTX ctx;
259 int dsize = 0, i, j, ret = 0;
260 unsigned char *p, *data = NULL;
261 const char *objstr = NULL;
262 char buf[PEM_BUFSIZE];
263 unsigned char key[EVP_MAX_KEY_LENGTH];
264 unsigned char iv[EVP_MAX_IV_LENGTH];
265
266 if (enc != NULL) {
267 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
268 if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0) {
269 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
270 goto err;
271 }
272 }
273
274 if ((dsize = i2d(x, NULL)) < 0) {
275 OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
276 dsize = 0;
277 goto err;
278 }
279 /* dzise + 8 bytes are needed */
280 /* actually it needs the cipher block size extra... */
281 data = (unsigned char *)OPENSSL_malloc((unsigned int)dsize + 20);
282 if (data == NULL) {
283 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
284 goto err;
285 }
286 p = data;
287 i = i2d(x, &p);
288
289 if (enc != NULL) {
290 const unsigned iv_len = EVP_CIPHER_iv_length(enc);
291
292 if (kstr == NULL) {
293 klen = 0;
294 if (!callback)
295 callback = PEM_def_callback;
296 klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
297 if (klen <= 0) {
298 OPENSSL_PUT_ERROR(PEM, PEM_R_READ_KEY);
299 goto err;
300 }
301 kstr = (unsigned char *)buf;
302 }
303 assert(iv_len <= (int)sizeof(iv));
304 if (!RAND_bytes(iv, iv_len)) /* Generate a salt */
305 goto err;
306 /*
307 * The 'iv' is used as the iv and as a salt. It is NOT taken from
308 * the BytesToKey function
309 */
310 if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
311 goto err;
312
313 if (kstr == (unsigned char *)buf)
314 OPENSSL_cleanse(buf, PEM_BUFSIZE);
315
316 assert(strlen(objstr) + 23 + 2 * iv_len + 13 <= sizeof buf);
317
318 buf[0] = '\0';
319 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
320 PEM_dek_info(buf, objstr, iv_len, (char *)iv);
321 /* k=strlen(buf); */
322
323 EVP_CIPHER_CTX_init(&ctx);
324 ret = 1;
325 if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv)
326 || !EVP_EncryptUpdate(&ctx, data, &j, data, i)
327 || !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i))
328 ret = 0;
329 else
330 i += j;
331 EVP_CIPHER_CTX_cleanup(&ctx);
332 if (ret == 0)
333 goto err;
334 } else {
335 ret = 1;
336 buf[0] = '\0';
337 }
338 i = PEM_write_bio(bp, name, buf, data, i);
339 if (i <= 0)
340 ret = 0;
341 err:
342 OPENSSL_cleanse(key, sizeof(key));
343 OPENSSL_cleanse(iv, sizeof(iv));
344 OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
345 OPENSSL_cleanse(buf, PEM_BUFSIZE);
346 OPENSSL_free(data);
347 return (ret);
348 }
349
PEM_do_header(EVP_CIPHER_INFO * cipher,unsigned char * data,long * plen,pem_password_cb * callback,void * u)350 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
351 pem_password_cb *callback, void *u)
352 {
353 int i = 0, j, o, klen;
354 long len;
355 EVP_CIPHER_CTX ctx;
356 unsigned char key[EVP_MAX_KEY_LENGTH];
357 char buf[PEM_BUFSIZE];
358
359 len = *plen;
360
361 if (cipher->cipher == NULL)
362 return (1);
363
364 klen = 0;
365 if (!callback)
366 callback = PEM_def_callback;
367 klen = callback(buf, PEM_BUFSIZE, 0, u);
368 if (klen <= 0) {
369 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_PASSWORD_READ);
370 return (0);
371 }
372
373 if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
374 (unsigned char *)buf, klen, 1, key, NULL))
375 return 0;
376
377 j = (int)len;
378 EVP_CIPHER_CTX_init(&ctx);
379 o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
380 if (o)
381 o = EVP_DecryptUpdate(&ctx, data, &i, data, j);
382 if (o)
383 o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
384 EVP_CIPHER_CTX_cleanup(&ctx);
385 OPENSSL_cleanse((char *)buf, sizeof(buf));
386 OPENSSL_cleanse((char *)key, sizeof(key));
387 if (!o) {
388 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_DECRYPT);
389 return (0);
390 }
391 j += i;
392 *plen = j;
393 return (1);
394 }
395
cipher_by_name(const char * name)396 static const EVP_CIPHER *cipher_by_name(const char *name)
397 {
398 /* This is similar to the (deprecated) function |EVP_get_cipherbyname|. */
399 if (0 == strcmp(name, SN_rc4)) {
400 return EVP_rc4();
401 } else if (0 == strcmp(name, SN_des_cbc)) {
402 return EVP_des_cbc();
403 } else if (0 == strcmp(name, SN_des_ede3_cbc)) {
404 return EVP_des_ede3_cbc();
405 } else if (0 == strcmp(name, SN_aes_128_cbc)) {
406 return EVP_aes_128_cbc();
407 } else if (0 == strcmp(name, SN_aes_192_cbc)) {
408 return EVP_aes_192_cbc();
409 } else if (0 == strcmp(name, SN_aes_256_cbc)) {
410 return EVP_aes_256_cbc();
411 } else {
412 return NULL;
413 }
414 }
415
PEM_get_EVP_CIPHER_INFO(char * header,EVP_CIPHER_INFO * cipher)416 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
417 {
418 const EVP_CIPHER *enc = NULL;
419 char *p, c;
420 char **header_pp = &header;
421
422 cipher->cipher = NULL;
423 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
424 return (1);
425 if (strncmp(header, "Proc-Type: ", 11) != 0) {
426 OPENSSL_PUT_ERROR(PEM, PEM_R_NOT_PROC_TYPE);
427 return (0);
428 }
429 header += 11;
430 if (*header != '4')
431 return (0);
432 header++;
433 if (*header != ',')
434 return (0);
435 header++;
436 if (strncmp(header, "ENCRYPTED", 9) != 0) {
437 OPENSSL_PUT_ERROR(PEM, PEM_R_NOT_ENCRYPTED);
438 return (0);
439 }
440 for (; (*header != '\n') && (*header != '\0'); header++) ;
441 if (*header == '\0') {
442 OPENSSL_PUT_ERROR(PEM, PEM_R_SHORT_HEADER);
443 return (0);
444 }
445 header++;
446 if (strncmp(header, "DEK-Info: ", 10) != 0) {
447 OPENSSL_PUT_ERROR(PEM, PEM_R_NOT_DEK_INFO);
448 return (0);
449 }
450 header += 10;
451
452 p = header;
453 for (;;) {
454 c = *header;
455 if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') ||
456 ((c >= '0') && (c <= '9'))))
457 break;
458 header++;
459 }
460 *header = '\0';
461 cipher->cipher = enc = cipher_by_name(p);
462 *header = c;
463 header++;
464
465 if (enc == NULL) {
466 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_ENCRYPTION);
467 return (0);
468 }
469 if (!load_iv(header_pp, &(cipher->iv[0]), EVP_CIPHER_iv_length(enc)))
470 return (0);
471
472 return (1);
473 }
474
load_iv(char ** fromp,unsigned char * to,int num)475 static int load_iv(char **fromp, unsigned char *to, int num)
476 {
477 int v, i;
478 char *from;
479
480 from = *fromp;
481 for (i = 0; i < num; i++)
482 to[i] = 0;
483 num *= 2;
484 for (i = 0; i < num; i++) {
485 if ((*from >= '0') && (*from <= '9'))
486 v = *from - '0';
487 else if ((*from >= 'A') && (*from <= 'F'))
488 v = *from - 'A' + 10;
489 else if ((*from >= 'a') && (*from <= 'f'))
490 v = *from - 'a' + 10;
491 else {
492 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_IV_CHARS);
493 return (0);
494 }
495 from++;
496 to[i / 2] |= v << (long)((!(i & 1)) * 4);
497 }
498
499 *fromp = from;
500 return (1);
501 }
502
503 #ifndef OPENSSL_NO_FP_API
PEM_write(FILE * fp,const char * name,const char * header,const unsigned char * data,long len)504 int PEM_write(FILE *fp, const char *name, const char *header,
505 const unsigned char *data, long len)
506 {
507 BIO *b;
508 int ret;
509
510 if ((b = BIO_new(BIO_s_file())) == NULL) {
511 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
512 return (0);
513 }
514 BIO_set_fp(b, fp, BIO_NOCLOSE);
515 ret = PEM_write_bio(b, name, header, data, len);
516 BIO_free(b);
517 return (ret);
518 }
519 #endif
520
PEM_write_bio(BIO * bp,const char * name,const char * header,const unsigned char * data,long len)521 int PEM_write_bio(BIO *bp, const char *name, const char *header,
522 const unsigned char *data, long len)
523 {
524 int nlen, n, i, j, outl;
525 unsigned char *buf = NULL;
526 EVP_ENCODE_CTX ctx;
527 int reason = ERR_R_BUF_LIB;
528
529 EVP_EncodeInit(&ctx);
530 nlen = strlen(name);
531
532 if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
533 (BIO_write(bp, name, nlen) != nlen) ||
534 (BIO_write(bp, "-----\n", 6) != 6))
535 goto err;
536
537 i = strlen(header);
538 if (i > 0) {
539 if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
540 goto err;
541 }
542
543 buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
544 if (buf == NULL) {
545 reason = ERR_R_MALLOC_FAILURE;
546 goto err;
547 }
548
549 i = j = 0;
550 while (len > 0) {
551 n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
552 EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n);
553 if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
554 goto err;
555 i += outl;
556 len -= n;
557 j += n;
558 }
559 EVP_EncodeFinal(&ctx, buf, &outl);
560 if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
561 goto err;
562 OPENSSL_free(buf);
563 buf = NULL;
564 if ((BIO_write(bp, "-----END ", 9) != 9) ||
565 (BIO_write(bp, name, nlen) != nlen) ||
566 (BIO_write(bp, "-----\n", 6) != 6))
567 goto err;
568 return (i + outl);
569 err:
570 if (buf) {
571 OPENSSL_free(buf);
572 }
573 OPENSSL_PUT_ERROR(PEM, reason);
574 return (0);
575 }
576
577 #ifndef OPENSSL_NO_FP_API
PEM_read(FILE * fp,char ** name,char ** header,unsigned char ** data,long * len)578 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
579 long *len)
580 {
581 BIO *b;
582 int ret;
583
584 if ((b = BIO_new(BIO_s_file())) == NULL) {
585 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
586 return (0);
587 }
588 BIO_set_fp(b, fp, BIO_NOCLOSE);
589 ret = PEM_read_bio(b, name, header, data, len);
590 BIO_free(b);
591 return (ret);
592 }
593 #endif
594
PEM_read_bio(BIO * bp,char ** name,char ** header,unsigned char ** data,long * len)595 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
596 long *len)
597 {
598 EVP_ENCODE_CTX ctx;
599 int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
600 char buf[256];
601 BUF_MEM *nameB;
602 BUF_MEM *headerB;
603 BUF_MEM *dataB, *tmpB;
604
605 nameB = BUF_MEM_new();
606 headerB = BUF_MEM_new();
607 dataB = BUF_MEM_new();
608 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
609 BUF_MEM_free(nameB);
610 BUF_MEM_free(headerB);
611 BUF_MEM_free(dataB);
612 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
613 return (0);
614 }
615
616 buf[254] = '\0';
617 for (;;) {
618 i = BIO_gets(bp, buf, 254);
619
620 if (i <= 0) {
621 OPENSSL_PUT_ERROR(PEM, PEM_R_NO_START_LINE);
622 goto err;
623 }
624
625 while ((i >= 0) && (buf[i] <= ' '))
626 i--;
627 buf[++i] = '\n';
628 buf[++i] = '\0';
629
630 if (strncmp(buf, "-----BEGIN ", 11) == 0) {
631 i = strlen(&(buf[11]));
632
633 if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
634 continue;
635 if (!BUF_MEM_grow(nameB, i + 9)) {
636 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
637 goto err;
638 }
639 OPENSSL_memcpy(nameB->data, &(buf[11]), i - 6);
640 nameB->data[i - 6] = '\0';
641 break;
642 }
643 }
644 hl = 0;
645 if (!BUF_MEM_grow(headerB, 256)) {
646 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
647 goto err;
648 }
649 headerB->data[0] = '\0';
650 for (;;) {
651 i = BIO_gets(bp, buf, 254);
652 if (i <= 0)
653 break;
654
655 while ((i >= 0) && (buf[i] <= ' '))
656 i--;
657 buf[++i] = '\n';
658 buf[++i] = '\0';
659
660 if (buf[0] == '\n')
661 break;
662 if (!BUF_MEM_grow(headerB, hl + i + 9)) {
663 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
664 goto err;
665 }
666 if (strncmp(buf, "-----END ", 9) == 0) {
667 nohead = 1;
668 break;
669 }
670 OPENSSL_memcpy(&(headerB->data[hl]), buf, i);
671 headerB->data[hl + i] = '\0';
672 hl += i;
673 }
674
675 bl = 0;
676 if (!BUF_MEM_grow(dataB, 1024)) {
677 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
678 goto err;
679 }
680 dataB->data[0] = '\0';
681 if (!nohead) {
682 for (;;) {
683 i = BIO_gets(bp, buf, 254);
684 if (i <= 0)
685 break;
686
687 while ((i >= 0) && (buf[i] <= ' '))
688 i--;
689 buf[++i] = '\n';
690 buf[++i] = '\0';
691
692 if (i != 65)
693 end = 1;
694 if (strncmp(buf, "-----END ", 9) == 0)
695 break;
696 if (i > 65)
697 break;
698 if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
699 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
700 goto err;
701 }
702 OPENSSL_memcpy(&(dataB->data[bl]), buf, i);
703 dataB->data[bl + i] = '\0';
704 bl += i;
705 if (end) {
706 buf[0] = '\0';
707 i = BIO_gets(bp, buf, 254);
708 if (i <= 0)
709 break;
710
711 while ((i >= 0) && (buf[i] <= ' '))
712 i--;
713 buf[++i] = '\n';
714 buf[++i] = '\0';
715
716 break;
717 }
718 }
719 } else {
720 tmpB = headerB;
721 headerB = dataB;
722 dataB = tmpB;
723 bl = hl;
724 }
725 i = strlen(nameB->data);
726 if ((strncmp(buf, "-----END ", 9) != 0) ||
727 (strncmp(nameB->data, &(buf[9]), i) != 0) ||
728 (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
729 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_END_LINE);
730 goto err;
731 }
732
733 EVP_DecodeInit(&ctx);
734 i = EVP_DecodeUpdate(&ctx,
735 (unsigned char *)dataB->data, &bl,
736 (unsigned char *)dataB->data, bl);
737 if (i < 0) {
738 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_BASE64_DECODE);
739 goto err;
740 }
741 i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
742 if (i < 0) {
743 OPENSSL_PUT_ERROR(PEM, PEM_R_BAD_BASE64_DECODE);
744 goto err;
745 }
746 bl += k;
747
748 if (bl == 0)
749 goto err;
750 *name = nameB->data;
751 *header = headerB->data;
752 *data = (unsigned char *)dataB->data;
753 *len = bl;
754 OPENSSL_free(nameB);
755 OPENSSL_free(headerB);
756 OPENSSL_free(dataB);
757 return (1);
758 err:
759 BUF_MEM_free(nameB);
760 BUF_MEM_free(headerB);
761 BUF_MEM_free(dataB);
762 return (0);
763 }
764
PEM_def_callback(char * buf,int size,int rwflag,void * userdata)765 int PEM_def_callback(char *buf, int size, int rwflag, void *userdata)
766 {
767 if (!buf || !userdata || size < 0) {
768 return 0;
769 }
770 size_t len = strlen((char *)userdata);
771 if (len >= (size_t)size) {
772 return 0;
773 }
774 BUF_strlcpy(buf, userdata, (size_t)size);
775 return len;
776 }
777