Line data Source code
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 :
59 : #include <stdio.h>
60 : #include <ctype.h>
61 : #include "cryptlib.h"
62 : #include <openssl/buffer.h>
63 : #include <openssl/objects.h>
64 : #include <openssl/evp.h>
65 : #include <openssl/rand.h>
66 : #include <openssl/x509.h>
67 : #include <openssl/pem.h>
68 : #include <openssl/pkcs12.h>
69 : #include "asn1_locl.h"
70 : #ifndef OPENSSL_NO_DES
71 : # include <openssl/des.h>
72 : #endif
73 : #ifndef OPENSSL_NO_ENGINE
74 : # include <openssl/engine.h>
75 : #endif
76 :
77 : const char PEM_version[] = "PEM" OPENSSL_VERSION_PTEXT;
78 :
79 : #define MIN_LENGTH 4
80 :
81 : static int load_iv(char **fromp, unsigned char *to, int num);
82 : static int check_pem(const char *nm, const char *name);
83 : int pem_check_suffix(const char *pem_str, const char *suffix);
84 :
85 0 : int PEM_def_callback(char *buf, int num, int w, void *key)
86 : {
87 : #ifdef OPENSSL_NO_FP_API
88 : /*
89 : * We should not ever call the default callback routine from windows.
90 : */
91 : PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
92 : return (-1);
93 : #else
94 : int i, j;
95 : const char *prompt;
96 0 : if (key) {
97 0 : i = strlen(key);
98 0 : i = (i > num) ? num : i;
99 0 : memcpy(buf, key, i);
100 0 : return (i);
101 : }
102 :
103 0 : prompt = EVP_get_pw_prompt();
104 0 : if (prompt == NULL)
105 : prompt = "Enter PEM pass phrase:";
106 :
107 : for (;;) {
108 0 : i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w);
109 0 : if (i != 0) {
110 0 : PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
111 0 : memset(buf, 0, (unsigned int)num);
112 0 : return (-1);
113 : }
114 0 : j = strlen(buf);
115 0 : if (j < MIN_LENGTH) {
116 0 : fprintf(stderr,
117 : "phrase is too short, needs to be at least %d chars\n",
118 : MIN_LENGTH);
119 : } else
120 : break;
121 : }
122 : return (j);
123 : #endif
124 : }
125 :
126 0 : void PEM_proc_type(char *buf, int type)
127 : {
128 : const char *str;
129 :
130 0 : if (type == PEM_TYPE_ENCRYPTED)
131 : str = "ENCRYPTED";
132 0 : else if (type == PEM_TYPE_MIC_CLEAR)
133 : str = "MIC-CLEAR";
134 0 : else if (type == PEM_TYPE_MIC_ONLY)
135 : str = "MIC-ONLY";
136 : else
137 : str = "BAD-TYPE";
138 :
139 0 : BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE);
140 0 : BUF_strlcat(buf, str, PEM_BUFSIZE);
141 0 : BUF_strlcat(buf, "\n", PEM_BUFSIZE);
142 0 : }
143 :
144 0 : void PEM_dek_info(char *buf, const char *type, int len, char *str)
145 : {
146 : static const unsigned char map[17] = "0123456789ABCDEF";
147 : long i;
148 : int j;
149 :
150 0 : BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE);
151 0 : BUF_strlcat(buf, type, PEM_BUFSIZE);
152 0 : BUF_strlcat(buf, ",", PEM_BUFSIZE);
153 0 : j = strlen(buf);
154 0 : if (j + (len * 2) + 1 > PEM_BUFSIZE)
155 0 : return;
156 0 : for (i = 0; i < len; i++) {
157 0 : buf[j + i * 2] = map[(str[i] >> 4) & 0x0f];
158 0 : buf[j + i * 2 + 1] = map[(str[i]) & 0x0f];
159 : }
160 0 : buf[j + i * 2] = '\n';
161 0 : buf[j + i * 2 + 1] = '\0';
162 : }
163 :
164 : #ifndef OPENSSL_NO_FP_API
165 0 : void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
166 : pem_password_cb *cb, void *u)
167 : {
168 : BIO *b;
169 : void *ret;
170 :
171 0 : if ((b = BIO_new(BIO_s_file())) == NULL) {
172 0 : PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB);
173 0 : return (0);
174 : }
175 0 : BIO_set_fp(b, fp, BIO_NOCLOSE);
176 0 : ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u);
177 0 : BIO_free(b);
178 0 : return (ret);
179 : }
180 : #endif
181 :
182 1761 : static int check_pem(const char *nm, const char *name)
183 : {
184 : /* Normal matching nm and name */
185 1761 : if (!strcmp(nm, name))
186 : return 1;
187 :
188 : /* Make PEM_STRING_EVP_PKEY match any private key */
189 :
190 1322 : if (!strcmp(name, PEM_STRING_EVP_PKEY)) {
191 : int slen;
192 : const EVP_PKEY_ASN1_METHOD *ameth;
193 450 : if (!strcmp(nm, PEM_STRING_PKCS8))
194 : return 1;
195 450 : if (!strcmp(nm, PEM_STRING_PKCS8INF))
196 : return 1;
197 438 : slen = pem_check_suffix(nm, "PRIVATE KEY");
198 438 : if (slen > 0) {
199 : /*
200 : * NB: ENGINE implementations wont contain a deprecated old
201 : * private key decode function so don't look for them.
202 : */
203 438 : ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
204 438 : if (ameth && ameth->old_priv_decode)
205 : return 1;
206 : }
207 : return 0;
208 : }
209 :
210 872 : if (!strcmp(name, PEM_STRING_PARAMETERS)) {
211 : int slen;
212 : const EVP_PKEY_ASN1_METHOD *ameth;
213 0 : slen = pem_check_suffix(nm, "PARAMETERS");
214 0 : if (slen > 0) {
215 : ENGINE *e;
216 0 : ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
217 0 : if (ameth) {
218 : int r;
219 0 : if (ameth->param_decode)
220 : r = 1;
221 : else
222 : r = 0;
223 : #ifndef OPENSSL_NO_ENGINE
224 0 : if (e)
225 0 : ENGINE_finish(e);
226 : #endif
227 0 : return r;
228 : }
229 : }
230 : return 0;
231 : }
232 : /* If reading DH parameters handle X9.42 DH format too */
233 872 : if (!strcmp(nm, PEM_STRING_DHXPARAMS) &&
234 0 : !strcmp(name, PEM_STRING_DHPARAMS))
235 : return 1;
236 :
237 : /* Permit older strings */
238 :
239 872 : if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509))
240 : return 1;
241 :
242 872 : if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) &&
243 0 : !strcmp(name, PEM_STRING_X509_REQ))
244 : return 1;
245 :
246 : /* Allow normal certs to be read as trusted certs */
247 1744 : if (!strcmp(nm, PEM_STRING_X509) &&
248 872 : !strcmp(name, PEM_STRING_X509_TRUSTED))
249 : return 1;
250 :
251 0 : if (!strcmp(nm, PEM_STRING_X509_OLD) &&
252 0 : !strcmp(name, PEM_STRING_X509_TRUSTED))
253 : return 1;
254 :
255 : /* Some CAs use PKCS#7 with CERTIFICATE headers */
256 0 : if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7))
257 : return 1;
258 :
259 0 : if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
260 0 : !strcmp(name, PEM_STRING_PKCS7))
261 : return 1;
262 :
263 : #ifndef OPENSSL_NO_CMS
264 0 : if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_CMS))
265 : return 1;
266 : /* Allow CMS to be read from PKCS#7 headers */
267 0 : if (!strcmp(nm, PEM_STRING_PKCS7) && !strcmp(name, PEM_STRING_CMS))
268 : return 1;
269 : #endif
270 :
271 0 : return 0;
272 : }
273 :
274 2633 : int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm,
275 : const char *name, BIO *bp, pem_password_cb *cb,
276 : void *u)
277 : {
278 : EVP_CIPHER_INFO cipher;
279 2633 : char *nm = NULL, *header = NULL;
280 2633 : unsigned char *data = NULL;
281 : long len;
282 : int ret = 0;
283 :
284 : for (;;) {
285 2633 : if (!PEM_read_bio(bp, &nm, &header, &data, &len)) {
286 872 : if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE)
287 872 : ERR_add_error_data(2, "Expecting: ", name);
288 : return 0;
289 : }
290 1761 : if (check_pem(nm, name))
291 : break;
292 0 : OPENSSL_free(nm);
293 0 : OPENSSL_free(header);
294 0 : OPENSSL_free(data);
295 0 : }
296 1761 : if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
297 : goto err;
298 1761 : if (!PEM_do_header(&cipher, data, &len, cb, u))
299 : goto err;
300 :
301 1761 : *pdata = data;
302 1761 : *plen = len;
303 :
304 1761 : if (pnm)
305 450 : *pnm = nm;
306 :
307 : ret = 1;
308 :
309 : err:
310 1761 : if (!ret || !pnm)
311 1311 : OPENSSL_free(nm);
312 1761 : OPENSSL_free(header);
313 1761 : if (!ret)
314 0 : OPENSSL_free(data);
315 1761 : return ret;
316 : }
317 :
318 : #ifndef OPENSSL_NO_FP_API
319 0 : int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
320 : void *x, const EVP_CIPHER *enc, unsigned char *kstr,
321 : int klen, pem_password_cb *callback, void *u)
322 : {
323 : BIO *b;
324 : int ret;
325 :
326 0 : if ((b = BIO_new(BIO_s_file())) == NULL) {
327 0 : PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB);
328 0 : return (0);
329 : }
330 0 : BIO_set_fp(b, fp, BIO_NOCLOSE);
331 0 : ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u);
332 0 : BIO_free(b);
333 0 : return (ret);
334 : }
335 : #endif
336 :
337 0 : int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
338 : void *x, const EVP_CIPHER *enc, unsigned char *kstr,
339 : int klen, pem_password_cb *callback, void *u)
340 : {
341 : EVP_CIPHER_CTX ctx;
342 : int dsize = 0, i, j, ret = 0;
343 : unsigned char *p, *data = NULL;
344 : const char *objstr = NULL;
345 : char buf[PEM_BUFSIZE];
346 : unsigned char key[EVP_MAX_KEY_LENGTH];
347 : unsigned char iv[EVP_MAX_IV_LENGTH];
348 :
349 0 : if (enc != NULL) {
350 0 : objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
351 0 : if (objstr == NULL) {
352 0 : PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER);
353 0 : goto err;
354 : }
355 : }
356 :
357 0 : if ((dsize = i2d(x, NULL)) < 0) {
358 0 : PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB);
359 : dsize = 0;
360 0 : goto err;
361 : }
362 : /* dzise + 8 bytes are needed */
363 : /* actually it needs the cipher block size extra... */
364 0 : data = (unsigned char *)OPENSSL_malloc((unsigned int)dsize + 20);
365 0 : if (data == NULL) {
366 0 : PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE);
367 0 : goto err;
368 : }
369 0 : p = data;
370 0 : i = i2d(x, &p);
371 :
372 0 : if (enc != NULL) {
373 0 : if (kstr == NULL) {
374 0 : if (callback == NULL)
375 0 : klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
376 : else
377 0 : klen = (*callback) (buf, PEM_BUFSIZE, 1, u);
378 0 : if (klen <= 0) {
379 0 : PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY);
380 0 : goto err;
381 : }
382 : #ifdef CHARSET_EBCDIC
383 : /* Convert the pass phrase from EBCDIC */
384 : ebcdic2ascii(buf, buf, klen);
385 : #endif
386 : kstr = (unsigned char *)buf;
387 : }
388 0 : RAND_add(data, i, 0); /* put in the RSA key. */
389 0 : OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
390 0 : if (RAND_pseudo_bytes(iv, enc->iv_len) < 0) /* Generate a salt */
391 : goto err;
392 : /*
393 : * The 'iv' is used as the iv and as a salt. It is NOT taken from
394 : * the BytesToKey function
395 : */
396 0 : if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL))
397 : goto err;
398 :
399 0 : if (kstr == (unsigned char *)buf)
400 0 : OPENSSL_cleanse(buf, PEM_BUFSIZE);
401 :
402 0 : OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <=
403 : sizeof buf);
404 :
405 0 : buf[0] = '\0';
406 0 : PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
407 0 : PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
408 : /* k=strlen(buf); */
409 :
410 0 : EVP_CIPHER_CTX_init(&ctx);
411 : ret = 1;
412 0 : if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv)
413 0 : || !EVP_EncryptUpdate(&ctx, data, &j, data, i)
414 0 : || !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i))
415 : ret = 0;
416 0 : EVP_CIPHER_CTX_cleanup(&ctx);
417 0 : if (ret == 0)
418 : goto err;
419 0 : i += j;
420 : } else {
421 : ret = 1;
422 0 : buf[0] = '\0';
423 : }
424 0 : i = PEM_write_bio(bp, name, buf, data, i);
425 0 : if (i <= 0)
426 : ret = 0;
427 : err:
428 0 : OPENSSL_cleanse(key, sizeof(key));
429 0 : OPENSSL_cleanse(iv, sizeof(iv));
430 0 : OPENSSL_cleanse((char *)&ctx, sizeof(ctx));
431 0 : OPENSSL_cleanse(buf, PEM_BUFSIZE);
432 0 : if (data != NULL) {
433 0 : OPENSSL_cleanse(data, (unsigned int)dsize);
434 0 : OPENSSL_free(data);
435 : }
436 0 : return (ret);
437 : }
438 :
439 1761 : int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
440 : pem_password_cb *callback, void *u)
441 : {
442 1761 : int i = 0, j, o, klen;
443 : long len;
444 : EVP_CIPHER_CTX ctx;
445 : unsigned char key[EVP_MAX_KEY_LENGTH];
446 : char buf[PEM_BUFSIZE];
447 :
448 1761 : len = *plen;
449 :
450 1761 : if (cipher->cipher == NULL)
451 : return (1);
452 0 : if (callback == NULL)
453 0 : klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u);
454 : else
455 0 : klen = callback(buf, PEM_BUFSIZE, 0, u);
456 0 : if (klen <= 0) {
457 0 : PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ);
458 0 : return (0);
459 : }
460 : #ifdef CHARSET_EBCDIC
461 : /* Convert the pass phrase from EBCDIC */
462 : ebcdic2ascii(buf, buf, klen);
463 : #endif
464 :
465 0 : if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]),
466 : (unsigned char *)buf, klen, 1, key, NULL))
467 : return 0;
468 :
469 0 : j = (int)len;
470 0 : EVP_CIPHER_CTX_init(&ctx);
471 0 : o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0]));
472 0 : if (o)
473 0 : o = EVP_DecryptUpdate(&ctx, data, &i, data, j);
474 0 : if (o)
475 0 : o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j);
476 0 : EVP_CIPHER_CTX_cleanup(&ctx);
477 0 : OPENSSL_cleanse((char *)buf, sizeof(buf));
478 0 : OPENSSL_cleanse((char *)key, sizeof(key));
479 0 : if (o)
480 0 : j += i;
481 : else {
482 0 : PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT);
483 0 : return (0);
484 : }
485 0 : *plen = j;
486 0 : return (1);
487 : }
488 :
489 1761 : int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
490 : {
491 : const EVP_CIPHER *enc = NULL;
492 : char *p, c;
493 : char **header_pp = &header;
494 :
495 1761 : cipher->cipher = NULL;
496 1761 : if ((header == NULL) || (*header == '\0') || (*header == '\n'))
497 : return (1);
498 0 : if (strncmp(header, "Proc-Type: ", 11) != 0) {
499 0 : PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE);
500 0 : return (0);
501 : }
502 0 : header += 11;
503 0 : if (*header != '4')
504 : return (0);
505 0 : header++;
506 0 : if (*header != ',')
507 : return (0);
508 0 : header++;
509 0 : if (strncmp(header, "ENCRYPTED", 9) != 0) {
510 0 : PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED);
511 0 : return (0);
512 : }
513 0 : for (; (*header != '\n') && (*header != '\0'); header++) ;
514 0 : if (*header == '\0') {
515 0 : PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER);
516 0 : return (0);
517 : }
518 0 : header++;
519 0 : if (strncmp(header, "DEK-Info: ", 10) != 0) {
520 0 : PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO);
521 0 : return (0);
522 : }
523 0 : header += 10;
524 :
525 : p = header;
526 : for (;;) {
527 0 : c = *header;
528 : #ifndef CHARSET_EBCDIC
529 0 : if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') ||
530 0 : ((c >= '0') && (c <= '9'))))
531 : break;
532 : #else
533 : if (!(isupper(c) || (c == '-') || isdigit(c)))
534 : break;
535 : #endif
536 0 : header++;
537 0 : }
538 0 : *header = '\0';
539 0 : cipher->cipher = enc = EVP_get_cipherbyname(p);
540 0 : *header = c;
541 0 : header++;
542 :
543 0 : if (enc == NULL) {
544 0 : PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION);
545 0 : return (0);
546 : }
547 0 : if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len))
548 : return (0);
549 :
550 0 : return (1);
551 : }
552 :
553 0 : static int load_iv(char **fromp, unsigned char *to, int num)
554 : {
555 : int v, i;
556 : char *from;
557 :
558 0 : from = *fromp;
559 0 : for (i = 0; i < num; i++)
560 0 : to[i] = 0;
561 0 : num *= 2;
562 0 : for (i = 0; i < num; i++) {
563 0 : if ((*from >= '0') && (*from <= '9'))
564 0 : v = *from - '0';
565 0 : else if ((*from >= 'A') && (*from <= 'F'))
566 0 : v = *from - 'A' + 10;
567 0 : else if ((*from >= 'a') && (*from <= 'f'))
568 0 : v = *from - 'a' + 10;
569 : else {
570 0 : PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS);
571 0 : return (0);
572 : }
573 0 : from++;
574 0 : to[i / 2] |= v << (long)((!(i & 1)) * 4);
575 : }
576 :
577 0 : *fromp = from;
578 0 : return (1);
579 : }
580 :
581 : #ifndef OPENSSL_NO_FP_API
582 0 : int PEM_write(FILE *fp, const char *name, const char *header,
583 : const unsigned char *data, long len)
584 : {
585 : BIO *b;
586 : int ret;
587 :
588 0 : if ((b = BIO_new(BIO_s_file())) == NULL) {
589 0 : PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB);
590 0 : return (0);
591 : }
592 0 : BIO_set_fp(b, fp, BIO_NOCLOSE);
593 0 : ret = PEM_write_bio(b, name, header, data, len);
594 0 : BIO_free(b);
595 0 : return (ret);
596 : }
597 : #endif
598 :
599 0 : int PEM_write_bio(BIO *bp, const char *name, const char *header,
600 : const unsigned char *data, long len)
601 : {
602 : int nlen, n, i, j, outl;
603 : unsigned char *buf = NULL;
604 : EVP_ENCODE_CTX ctx;
605 : int reason = ERR_R_BUF_LIB;
606 :
607 0 : EVP_EncodeInit(&ctx);
608 0 : nlen = strlen(name);
609 :
610 0 : if ((BIO_write(bp, "-----BEGIN ", 11) != 11) ||
611 0 : (BIO_write(bp, name, nlen) != nlen) ||
612 0 : (BIO_write(bp, "-----\n", 6) != 6))
613 : goto err;
614 :
615 0 : i = strlen(header);
616 0 : if (i > 0) {
617 0 : if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1))
618 : goto err;
619 : }
620 :
621 0 : buf = OPENSSL_malloc(PEM_BUFSIZE * 8);
622 0 : if (buf == NULL) {
623 : reason = ERR_R_MALLOC_FAILURE;
624 : goto err;
625 : }
626 :
627 : i = j = 0;
628 0 : while (len > 0) {
629 0 : n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len);
630 0 : EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n);
631 0 : if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl))
632 : goto err;
633 0 : i += outl;
634 0 : len -= n;
635 0 : j += n;
636 : }
637 0 : EVP_EncodeFinal(&ctx, buf, &outl);
638 0 : if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl))
639 : goto err;
640 0 : OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
641 0 : OPENSSL_free(buf);
642 : buf = NULL;
643 0 : if ((BIO_write(bp, "-----END ", 9) != 9) ||
644 0 : (BIO_write(bp, name, nlen) != nlen) ||
645 0 : (BIO_write(bp, "-----\n", 6) != 6))
646 : goto err;
647 0 : return (i + outl);
648 : err:
649 0 : if (buf) {
650 0 : OPENSSL_cleanse(buf, PEM_BUFSIZE * 8);
651 0 : OPENSSL_free(buf);
652 : }
653 0 : PEMerr(PEM_F_PEM_WRITE_BIO, reason);
654 0 : return (0);
655 : }
656 :
657 : #ifndef OPENSSL_NO_FP_API
658 0 : int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
659 : long *len)
660 : {
661 : BIO *b;
662 : int ret;
663 :
664 0 : if ((b = BIO_new(BIO_s_file())) == NULL) {
665 0 : PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB);
666 0 : return (0);
667 : }
668 0 : BIO_set_fp(b, fp, BIO_NOCLOSE);
669 0 : ret = PEM_read_bio(b, name, header, data, len);
670 0 : BIO_free(b);
671 0 : return (ret);
672 : }
673 : #endif
674 :
675 2633 : int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
676 : long *len)
677 : {
678 : EVP_ENCODE_CTX ctx;
679 2633 : int end = 0, i, k, bl = 0, hl = 0, nohead = 0;
680 : char buf[256];
681 : BUF_MEM *nameB;
682 : BUF_MEM *headerB;
683 : BUF_MEM *dataB, *tmpB;
684 :
685 2633 : nameB = BUF_MEM_new();
686 2633 : headerB = BUF_MEM_new();
687 2633 : dataB = BUF_MEM_new();
688 2633 : if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) {
689 0 : BUF_MEM_free(nameB);
690 0 : BUF_MEM_free(headerB);
691 0 : BUF_MEM_free(dataB);
692 0 : PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
693 0 : return (0);
694 : }
695 :
696 2633 : buf[254] = '\0';
697 : for (;;) {
698 2633 : i = BIO_gets(bp, buf, 254);
699 :
700 2633 : if (i <= 0) {
701 872 : PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE);
702 872 : goto err;
703 : }
704 :
705 5283 : while ((i >= 0) && (buf[i] <= ' '))
706 3522 : i--;
707 1761 : buf[++i] = '\n';
708 1761 : buf[++i] = '\0';
709 :
710 1761 : if (strncmp(buf, "-----BEGIN ", 11) == 0) {
711 1761 : i = strlen(&(buf[11]));
712 :
713 1761 : if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0)
714 0 : continue;
715 1761 : if (!BUF_MEM_grow(nameB, i + 9)) {
716 0 : PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
717 0 : goto err;
718 : }
719 1761 : memcpy(nameB->data, &(buf[11]), i - 6);
720 1761 : nameB->data[i - 6] = '\0';
721 : break;
722 : }
723 : }
724 : hl = 0;
725 1761 : if (!BUF_MEM_grow(headerB, 256)) {
726 0 : PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
727 0 : goto err;
728 : }
729 1761 : headerB->data[0] = '\0';
730 : for (;;) {
731 25106 : i = BIO_gets(bp, buf, 254);
732 25106 : if (i <= 0)
733 : break;
734 :
735 75318 : while ((i >= 0) && (buf[i] <= ' '))
736 50212 : i--;
737 25106 : buf[++i] = '\n';
738 25106 : buf[++i] = '\0';
739 :
740 25106 : if (buf[0] == '\n')
741 : break;
742 25106 : if (!BUF_MEM_grow(headerB, hl + i + 9)) {
743 0 : PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
744 0 : goto err;
745 : }
746 25106 : if (strncmp(buf, "-----END ", 9) == 0) {
747 : nohead = 1;
748 : break;
749 : }
750 23345 : memcpy(&(headerB->data[hl]), buf, i);
751 23345 : headerB->data[hl + i] = '\0';
752 : hl += i;
753 23345 : }
754 :
755 1761 : bl = 0;
756 1761 : if (!BUF_MEM_grow(dataB, 1024)) {
757 0 : PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
758 0 : goto err;
759 : }
760 1761 : dataB->data[0] = '\0';
761 1761 : if (!nohead) {
762 : for (;;) {
763 0 : i = BIO_gets(bp, buf, 254);
764 0 : if (i <= 0)
765 : break;
766 :
767 0 : while ((i >= 0) && (buf[i] <= ' '))
768 0 : i--;
769 0 : buf[++i] = '\n';
770 0 : buf[++i] = '\0';
771 :
772 0 : if (i != 65)
773 : end = 1;
774 0 : if (strncmp(buf, "-----END ", 9) == 0)
775 : break;
776 0 : if (i > 65)
777 : break;
778 0 : if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) {
779 0 : PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE);
780 0 : goto err;
781 : }
782 0 : memcpy(&(dataB->data[bl]), buf, i);
783 0 : dataB->data[bl + i] = '\0';
784 0 : bl += i;
785 0 : if (end) {
786 0 : buf[0] = '\0';
787 0 : i = BIO_gets(bp, buf, 254);
788 0 : if (i <= 0)
789 : break;
790 :
791 0 : while ((i >= 0) && (buf[i] <= ' '))
792 0 : i--;
793 0 : buf[++i] = '\n';
794 0 : buf[++i] = '\0';
795 :
796 0 : break;
797 : }
798 : }
799 : } else {
800 : tmpB = headerB;
801 : headerB = dataB;
802 : dataB = tmpB;
803 1761 : bl = hl;
804 : }
805 1761 : i = strlen(nameB->data);
806 3522 : if ((strncmp(buf, "-----END ", 9) != 0) ||
807 3522 : (strncmp(nameB->data, &(buf[9]), i) != 0) ||
808 1761 : (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) {
809 0 : PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE);
810 0 : goto err;
811 : }
812 :
813 1761 : EVP_DecodeInit(&ctx);
814 3522 : i = EVP_DecodeUpdate(&ctx,
815 1761 : (unsigned char *)dataB->data, &bl,
816 : (unsigned char *)dataB->data, bl);
817 1761 : if (i < 0) {
818 0 : PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
819 0 : goto err;
820 : }
821 1761 : i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k);
822 1761 : if (i < 0) {
823 0 : PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE);
824 0 : goto err;
825 : }
826 1761 : bl += k;
827 :
828 1761 : if (bl == 0)
829 : goto err;
830 1761 : *name = nameB->data;
831 1761 : *header = headerB->data;
832 1761 : *data = (unsigned char *)dataB->data;
833 1761 : *len = bl;
834 1761 : OPENSSL_free(nameB);
835 1761 : OPENSSL_free(headerB);
836 1761 : OPENSSL_free(dataB);
837 1761 : return (1);
838 : err:
839 872 : BUF_MEM_free(nameB);
840 872 : BUF_MEM_free(headerB);
841 872 : BUF_MEM_free(dataB);
842 872 : return (0);
843 : }
844 :
845 : /*
846 : * Check pem string and return prefix length. If for example the pem_str ==
847 : * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the
848 : * string "RSA".
849 : */
850 :
851 876 : int pem_check_suffix(const char *pem_str, const char *suffix)
852 : {
853 876 : int pem_len = strlen(pem_str);
854 876 : int suffix_len = strlen(suffix);
855 : const char *p;
856 876 : if (suffix_len + 1 >= pem_len)
857 : return 0;
858 876 : p = pem_str + pem_len - suffix_len;
859 876 : if (strcmp(p, suffix))
860 : return 0;
861 876 : p--;
862 876 : if (*p != ' ')
863 : return 0;
864 876 : return p - pem_str;
865 : }
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