]>
Commit | Line | Data |
---|---|---|
d02b48c6 | 1 | /* crypto/pem/pem_lib.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
ae5c8664 | 8 | * |
d02b48c6 RE |
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). | |
ae5c8664 | 15 | * |
d02b48c6 RE |
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. | |
ae5c8664 | 22 | * |
d02b48c6 RE |
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 :-). | |
ae5c8664 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
ae5c8664 | 40 | * |
d02b48c6 RE |
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. | |
ae5c8664 | 52 | * |
d02b48c6 RE |
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> | |
d82e2718 | 60 | #include <ctype.h> |
d02b48c6 | 61 | #include "cryptlib.h" |
ec577822 BM |
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> | |
095ce353 | 68 | #include <openssl/pkcs12.h> |
e4263314 | 69 | #include "asn1_locl.h" |
cf1b7d96 | 70 | #ifndef OPENSSL_NO_DES |
ae5c8664 | 71 | # include <openssl/des.h> |
d02b48c6 | 72 | #endif |
01b8b3c7 | 73 | #ifndef OPENSSL_NO_ENGINE |
ae5c8664 | 74 | # include <openssl/engine.h> |
01b8b3c7 | 75 | #endif |
d02b48c6 | 76 | |
ae5c8664 | 77 | const char PEM_version[] = "PEM" OPENSSL_VERSION_PTEXT; |
d02b48c6 | 78 | |
ae5c8664 | 79 | #define MIN_LENGTH 4 |
d02b48c6 | 80 | |
ae5c8664 | 81 | static int load_iv(char **fromp, unsigned char *to, int num); |
ce1b4fe1 | 82 | static int check_pem(const char *nm, const char *name); |
e4263314 | 83 | int pem_check_suffix(const char *pem_str, const char *suffix); |
1241126a DSH |
84 | |
85 | int PEM_def_callback(char *buf, int num, int w, void *key) | |
ae5c8664 | 86 | { |
cf1b7d96 | 87 | #ifdef OPENSSL_NO_FP_API |
ae5c8664 MC |
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); | |
d02b48c6 | 93 | #else |
ae5c8664 MC |
94 | int i, j; |
95 | const char *prompt; | |
96 | if (key) { | |
97 | i = strlen(key); | |
98 | i = (i > num) ? num : i; | |
99 | memcpy(buf, key, i); | |
100 | return (i); | |
101 | } | |
102 | ||
103 | prompt = EVP_get_pw_prompt(); | |
104 | if (prompt == NULL) | |
105 | prompt = "Enter PEM pass phrase:"; | |
106 | ||
107 | for (;;) { | |
108 | i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w); | |
109 | if (i != 0) { | |
110 | PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD); | |
111 | memset(buf, 0, (unsigned int)num); | |
112 | return (-1); | |
113 | } | |
114 | j = strlen(buf); | |
115 | if (j < MIN_LENGTH) { | |
116 | 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); | |
d02b48c6 | 123 | #endif |
ae5c8664 | 124 | } |
d02b48c6 | 125 | |
6b691a5c | 126 | void PEM_proc_type(char *buf, int type) |
ae5c8664 MC |
127 | { |
128 | const char *str; | |
129 | ||
130 | if (type == PEM_TYPE_ENCRYPTED) | |
131 | str = "ENCRYPTED"; | |
132 | else if (type == PEM_TYPE_MIC_CLEAR) | |
133 | str = "MIC-CLEAR"; | |
134 | else if (type == PEM_TYPE_MIC_ONLY) | |
135 | str = "MIC-ONLY"; | |
136 | else | |
137 | str = "BAD-TYPE"; | |
138 | ||
139 | BUF_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE); | |
140 | BUF_strlcat(buf, str, PEM_BUFSIZE); | |
141 | BUF_strlcat(buf, "\n", PEM_BUFSIZE); | |
142 | } | |
d02b48c6 | 143 | |
6b691a5c | 144 | void PEM_dek_info(char *buf, const char *type, int len, char *str) |
ae5c8664 MC |
145 | { |
146 | static const unsigned char map[17] = "0123456789ABCDEF"; | |
147 | long i; | |
148 | int j; | |
149 | ||
150 | BUF_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE); | |
151 | BUF_strlcat(buf, type, PEM_BUFSIZE); | |
152 | BUF_strlcat(buf, ",", PEM_BUFSIZE); | |
153 | j = strlen(buf); | |
154 | if (j + (len * 2) + 1 > PEM_BUFSIZE) | |
155 | return; | |
156 | for (i = 0; i < len; i++) { | |
157 | buf[j + i * 2] = map[(str[i] >> 4) & 0x0f]; | |
158 | buf[j + i * 2 + 1] = map[(str[i]) & 0x0f]; | |
159 | } | |
160 | buf[j + i * 2] = '\n'; | |
161 | buf[j + i * 2 + 1] = '\0'; | |
162 | } | |
d02b48c6 | 163 | |
cf1b7d96 | 164 | #ifndef OPENSSL_NO_FP_API |
8bb826ee | 165 | void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, |
ae5c8664 MC |
166 | pem_password_cb *cb, void *u) |
167 | { | |
168 | BIO *b; | |
169 | void *ret; | |
170 | ||
171 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
172 | PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB); | |
173 | return (0); | |
174 | } | |
175 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
176 | ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); | |
177 | BIO_free(b); | |
178 | return (ret); | |
179 | } | |
d02b48c6 RE |
180 | #endif |
181 | ||
ce1b4fe1 DSH |
182 | static int check_pem(const char *nm, const char *name) |
183 | { | |
ae5c8664 MC |
184 | /* Normal matching nm and name */ |
185 | if (!strcmp(nm, name)) | |
186 | return 1; | |
187 | ||
188 | /* Make PEM_STRING_EVP_PKEY match any private key */ | |
189 | ||
190 | if (!strcmp(name, PEM_STRING_EVP_PKEY)) { | |
191 | int slen; | |
192 | const EVP_PKEY_ASN1_METHOD *ameth; | |
193 | if (!strcmp(nm, PEM_STRING_PKCS8)) | |
194 | return 1; | |
195 | if (!strcmp(nm, PEM_STRING_PKCS8INF)) | |
196 | return 1; | |
197 | slen = pem_check_suffix(nm, "PRIVATE KEY"); | |
198 | 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 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); | |
204 | if (ameth && ameth->old_priv_decode) | |
205 | return 1; | |
206 | } | |
207 | return 0; | |
208 | } | |
209 | ||
210 | if (!strcmp(name, PEM_STRING_PARAMETERS)) { | |
211 | int slen; | |
212 | const EVP_PKEY_ASN1_METHOD *ameth; | |
213 | slen = pem_check_suffix(nm, "PARAMETERS"); | |
214 | if (slen > 0) { | |
215 | ENGINE *e; | |
216 | ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); | |
217 | if (ameth) { | |
218 | int r; | |
219 | if (ameth->param_decode) | |
220 | r = 1; | |
221 | else | |
222 | r = 0; | |
01b8b3c7 | 223 | #ifndef OPENSSL_NO_ENGINE |
ae5c8664 MC |
224 | if (e) |
225 | ENGINE_finish(e); | |
01b8b3c7 | 226 | #endif |
ae5c8664 MC |
227 | return r; |
228 | } | |
229 | } | |
230 | return 0; | |
231 | } | |
232 | /* If reading DH parameters handle X9.42 DH format too */ | |
233 | if (!strcmp(nm, PEM_STRING_DHXPARAMS) && | |
234 | !strcmp(name, PEM_STRING_DHPARAMS)) | |
235 | return 1; | |
3e4585c8 | 236 | |
ae5c8664 | 237 | /* Permit older strings */ |
ce1b4fe1 | 238 | |
ae5c8664 MC |
239 | if (!strcmp(nm, PEM_STRING_X509_OLD) && !strcmp(name, PEM_STRING_X509)) |
240 | return 1; | |
ce1b4fe1 | 241 | |
ae5c8664 MC |
242 | if (!strcmp(nm, PEM_STRING_X509_REQ_OLD) && |
243 | !strcmp(name, PEM_STRING_X509_REQ)) | |
244 | return 1; | |
ce1b4fe1 | 245 | |
ae5c8664 MC |
246 | /* Allow normal certs to be read as trusted certs */ |
247 | if (!strcmp(nm, PEM_STRING_X509) && | |
248 | !strcmp(name, PEM_STRING_X509_TRUSTED)) | |
249 | return 1; | |
ce1b4fe1 | 250 | |
ae5c8664 MC |
251 | if (!strcmp(nm, PEM_STRING_X509_OLD) && |
252 | !strcmp(name, PEM_STRING_X509_TRUSTED)) | |
253 | return 1; | |
ce1b4fe1 | 254 | |
ae5c8664 MC |
255 | /* Some CAs use PKCS#7 with CERTIFICATE headers */ |
256 | if (!strcmp(nm, PEM_STRING_X509) && !strcmp(name, PEM_STRING_PKCS7)) | |
257 | return 1; | |
3142c86d | 258 | |
ae5c8664 MC |
259 | if (!strcmp(nm, PEM_STRING_PKCS7_SIGNED) && |
260 | !strcmp(name, PEM_STRING_PKCS7)) | |
261 | return 1; | |
2401debe | 262 | |
8931b30d | 263 | #ifndef OPENSSL_NO_CMS |
ae5c8664 MC |
264 | 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 | if (!strcmp(nm, PEM_STRING_PKCS7) && !strcmp(name, PEM_STRING_CMS)) | |
268 | return 1; | |
8931b30d DSH |
269 | #endif |
270 | ||
ae5c8664 | 271 | return 0; |
ce1b4fe1 DSH |
272 | } |
273 | ||
ae5c8664 MC |
274 | 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 | char *nm = NULL, *header = NULL; | |
280 | unsigned char *data = NULL; | |
281 | long len; | |
282 | int ret = 0; | |
283 | ||
284 | for (;;) { | |
285 | if (!PEM_read_bio(bp, &nm, &header, &data, &len)) { | |
286 | if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) | |
287 | ERR_add_error_data(2, "Expecting: ", name); | |
288 | return 0; | |
289 | } | |
290 | if (check_pem(nm, name)) | |
291 | break; | |
292 | OPENSSL_free(nm); | |
293 | OPENSSL_free(header); | |
294 | OPENSSL_free(data); | |
295 | } | |
296 | if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) | |
297 | goto err; | |
298 | if (!PEM_do_header(&cipher, data, &len, cb, u)) | |
299 | goto err; | |
300 | ||
301 | *pdata = data; | |
302 | *plen = len; | |
303 | ||
304 | if (pnm) | |
305 | *pnm = nm; | |
306 | ||
307 | ret = 1; | |
308 | ||
309 | err: | |
310 | if (!ret || !pnm) | |
311 | OPENSSL_free(nm); | |
312 | OPENSSL_free(header); | |
313 | if (!ret) | |
314 | OPENSSL_free(data); | |
315 | return ret; | |
316 | } | |
d02b48c6 | 317 | |
cf1b7d96 | 318 | #ifndef OPENSSL_NO_FP_API |
8bb826ee | 319 | int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, |
ae5c8664 MC |
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 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
327 | PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB); | |
328 | return (0); | |
329 | } | |
330 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
331 | ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); | |
332 | BIO_free(b); | |
333 | return (ret); | |
334 | } | |
d02b48c6 RE |
335 | #endif |
336 | ||
8bb826ee | 337 | int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, |
ae5c8664 MC |
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 | if (enc != NULL) { | |
350 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); | |
351 | if (objstr == NULL) { | |
352 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER); | |
353 | goto err; | |
354 | } | |
355 | } | |
356 | ||
357 | if ((dsize = i2d(x, NULL)) < 0) { | |
358 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB); | |
359 | dsize = 0; | |
360 | goto err; | |
361 | } | |
362 | /* dzise + 8 bytes are needed */ | |
363 | /* actually it needs the cipher block size extra... */ | |
364 | data = (unsigned char *)OPENSSL_malloc((unsigned int)dsize + 20); | |
365 | if (data == NULL) { | |
366 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE); | |
367 | goto err; | |
368 | } | |
369 | p = data; | |
370 | i = i2d(x, &p); | |
371 | ||
372 | if (enc != NULL) { | |
373 | if (kstr == NULL) { | |
374 | if (callback == NULL) | |
375 | klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); | |
376 | else | |
377 | klen = (*callback) (buf, PEM_BUFSIZE, 1, u); | |
378 | if (klen <= 0) { | |
379 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY); | |
380 | goto err; | |
381 | } | |
a53955d8 | 382 | #ifdef CHARSET_EBCDIC |
ae5c8664 MC |
383 | /* Convert the pass phrase from EBCDIC */ |
384 | ebcdic2ascii(buf, buf, klen); | |
a53955d8 | 385 | #endif |
ae5c8664 MC |
386 | kstr = (unsigned char *)buf; |
387 | } | |
388 | RAND_add(data, i, 0); /* put in the RSA key. */ | |
389 | OPENSSL_assert(enc->iv_len <= (int)sizeof(iv)); | |
390 | 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 | if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) | |
397 | goto err; | |
398 | ||
399 | if (kstr == (unsigned char *)buf) | |
400 | OPENSSL_cleanse(buf, PEM_BUFSIZE); | |
401 | ||
402 | OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <= | |
403 | sizeof buf); | |
404 | ||
405 | buf[0] = '\0'; | |
406 | PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); | |
407 | PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); | |
408 | /* k=strlen(buf); */ | |
409 | ||
410 | EVP_CIPHER_CTX_init(&ctx); | |
411 | ret = 1; | |
412 | if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) | |
413 | || !EVP_EncryptUpdate(&ctx, data, &j, data, i) | |
414 | || !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i)) | |
415 | ret = 0; | |
416 | EVP_CIPHER_CTX_cleanup(&ctx); | |
417 | if (ret == 0) | |
418 | goto err; | |
419 | i += j; | |
420 | } else { | |
421 | ret = 1; | |
422 | buf[0] = '\0'; | |
423 | } | |
424 | i = PEM_write_bio(bp, name, buf, data, i); | |
425 | if (i <= 0) | |
426 | ret = 0; | |
427 | err: | |
428 | OPENSSL_cleanse(key, sizeof(key)); | |
429 | OPENSSL_cleanse(iv, sizeof(iv)); | |
430 | OPENSSL_cleanse((char *)&ctx, sizeof(ctx)); | |
431 | OPENSSL_cleanse(buf, PEM_BUFSIZE); | |
432 | if (data != NULL) { | |
433 | OPENSSL_cleanse(data, (unsigned int)dsize); | |
434 | OPENSSL_free(data); | |
435 | } | |
436 | return (ret); | |
437 | } | |
d02b48c6 | 438 | |
6b691a5c | 439 | int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, |
ae5c8664 MC |
440 | pem_password_cb *callback, void *u) |
441 | { | |
442 | 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 | len = *plen; | |
449 | ||
450 | if (cipher->cipher == NULL) | |
451 | return (1); | |
452 | if (callback == NULL) | |
453 | klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); | |
454 | else | |
455 | klen = callback(buf, PEM_BUFSIZE, 0, u); | |
456 | if (klen <= 0) { | |
457 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ); | |
458 | return (0); | |
459 | } | |
a53955d8 | 460 | #ifdef CHARSET_EBCDIC |
ae5c8664 MC |
461 | /* Convert the pass phrase from EBCDIC */ |
462 | ebcdic2ascii(buf, buf, klen); | |
a53955d8 UM |
463 | #endif |
464 | ||
ae5c8664 MC |
465 | if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), |
466 | (unsigned char *)buf, klen, 1, key, NULL)) | |
467 | return 0; | |
468 | ||
469 | j = (int)len; | |
470 | EVP_CIPHER_CTX_init(&ctx); | |
471 | o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); | |
472 | if (o) | |
473 | o = EVP_DecryptUpdate(&ctx, data, &i, data, j); | |
474 | if (o) | |
475 | o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j); | |
476 | EVP_CIPHER_CTX_cleanup(&ctx); | |
477 | OPENSSL_cleanse((char *)buf, sizeof(buf)); | |
478 | OPENSSL_cleanse((char *)key, sizeof(key)); | |
479 | if (o) | |
480 | j += i; | |
481 | else { | |
482 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); | |
483 | return (0); | |
484 | } | |
485 | *plen = j; | |
486 | return (1); | |
487 | } | |
d02b48c6 | 488 | |
6b691a5c | 489 | int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
ae5c8664 MC |
490 | { |
491 | const EVP_CIPHER *enc = NULL; | |
492 | char *p, c; | |
493 | char **header_pp = &header; | |
494 | ||
495 | cipher->cipher = NULL; | |
496 | if ((header == NULL) || (*header == '\0') || (*header == '\n')) | |
497 | return (1); | |
498 | if (strncmp(header, "Proc-Type: ", 11) != 0) { | |
499 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); | |
500 | return (0); | |
501 | } | |
502 | header += 11; | |
503 | if (*header != '4') | |
504 | return (0); | |
505 | header++; | |
506 | if (*header != ',') | |
507 | return (0); | |
508 | header++; | |
509 | if (strncmp(header, "ENCRYPTED", 9) != 0) { | |
510 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); | |
511 | return (0); | |
512 | } | |
513 | for (; (*header != '\n') && (*header != '\0'); header++) ; | |
514 | if (*header == '\0') { | |
515 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); | |
516 | return (0); | |
517 | } | |
518 | header++; | |
519 | if (strncmp(header, "DEK-Info: ", 10) != 0) { | |
520 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); | |
521 | return (0); | |
522 | } | |
523 | header += 10; | |
524 | ||
525 | p = header; | |
526 | for (;;) { | |
527 | c = *header; | |
a53955d8 | 528 | #ifndef CHARSET_EBCDIC |
ae5c8664 MC |
529 | if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') || |
530 | ((c >= '0') && (c <= '9')))) | |
531 | break; | |
a53955d8 | 532 | #else |
ae5c8664 MC |
533 | if (!(isupper(c) || (c == '-') || isdigit(c))) |
534 | break; | |
a53955d8 | 535 | #endif |
ae5c8664 MC |
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, PEM_R_UNSUPPORTED_ENCRYPTION); | |
545 | return (0); | |
546 | } | |
547 | if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len)) | |
548 | return (0); | |
549 | ||
550 | return (1); | |
551 | } | |
d02b48c6 | 552 | |
8c3c5701 | 553 | static int load_iv(char **fromp, unsigned char *to, int num) |
ae5c8664 MC |
554 | { |
555 | int v, i; | |
556 | char *from; | |
557 | ||
558 | from = *fromp; | |
559 | for (i = 0; i < num; i++) | |
560 | to[i] = 0; | |
561 | num *= 2; | |
562 | for (i = 0; i < num; i++) { | |
563 | if ((*from >= '0') && (*from <= '9')) | |
564 | v = *from - '0'; | |
565 | else if ((*from >= 'A') && (*from <= 'F')) | |
566 | v = *from - 'A' + 10; | |
567 | else if ((*from >= 'a') && (*from <= 'f')) | |
568 | v = *from - 'a' + 10; | |
569 | else { | |
570 | PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS); | |
571 | return (0); | |
572 | } | |
573 | from++; | |
574 | to[i / 2] |= v << (long)((!(i & 1)) * 4); | |
575 | } | |
576 | ||
577 | *fromp = from; | |
578 | return (1); | |
579 | } | |
d02b48c6 | 580 | |
cf1b7d96 | 581 | #ifndef OPENSSL_NO_FP_API |
03386484 | 582 | int PEM_write(FILE *fp, const char *name, const char *header, |
ae5c8664 MC |
583 | const unsigned char *data, long len) |
584 | { | |
585 | BIO *b; | |
586 | int ret; | |
587 | ||
588 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
589 | PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB); | |
590 | return (0); | |
591 | } | |
592 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
593 | ret = PEM_write_bio(b, name, header, data, len); | |
594 | BIO_free(b); | |
595 | return (ret); | |
596 | } | |
d02b48c6 RE |
597 | #endif |
598 | ||
03386484 | 599 | int PEM_write_bio(BIO *bp, const char *name, const char *header, |
ae5c8664 MC |
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 | EVP_EncodeInit(&ctx); | |
608 | nlen = strlen(name); | |
609 | ||
610 | if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || | |
611 | (BIO_write(bp, name, nlen) != nlen) || | |
612 | (BIO_write(bp, "-----\n", 6) != 6)) | |
613 | goto err; | |
614 | ||
615 | i = strlen(header); | |
616 | if (i > 0) { | |
617 | if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) | |
618 | goto err; | |
619 | } | |
620 | ||
621 | buf = OPENSSL_malloc(PEM_BUFSIZE * 8); | |
622 | if (buf == NULL) { | |
623 | reason = ERR_R_MALLOC_FAILURE; | |
624 | goto err; | |
625 | } | |
626 | ||
627 | i = j = 0; | |
628 | while (len > 0) { | |
629 | n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); | |
630 | EVP_EncodeUpdate(&ctx, buf, &outl, &(data[j]), n); | |
631 | if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) | |
632 | goto err; | |
633 | i += outl; | |
634 | len -= n; | |
635 | j += n; | |
636 | } | |
637 | EVP_EncodeFinal(&ctx, buf, &outl); | |
638 | if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) | |
639 | goto err; | |
640 | OPENSSL_cleanse(buf, PEM_BUFSIZE * 8); | |
641 | OPENSSL_free(buf); | |
642 | buf = NULL; | |
643 | if ((BIO_write(bp, "-----END ", 9) != 9) || | |
644 | (BIO_write(bp, name, nlen) != nlen) || | |
645 | (BIO_write(bp, "-----\n", 6) != 6)) | |
646 | goto err; | |
647 | return (i + outl); | |
648 | err: | |
649 | if (buf) { | |
650 | OPENSSL_cleanse(buf, PEM_BUFSIZE * 8); | |
651 | OPENSSL_free(buf); | |
652 | } | |
653 | PEMerr(PEM_F_PEM_WRITE_BIO, reason); | |
654 | return (0); | |
655 | } | |
d02b48c6 | 656 | |
cf1b7d96 | 657 | #ifndef OPENSSL_NO_FP_API |
6b691a5c | 658 | int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, |
ae5c8664 MC |
659 | long *len) |
660 | { | |
661 | BIO *b; | |
662 | int ret; | |
663 | ||
664 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
665 | PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB); | |
666 | return (0); | |
667 | } | |
668 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
669 | ret = PEM_read_bio(b, name, header, data, len); | |
670 | BIO_free(b); | |
671 | return (ret); | |
672 | } | |
d02b48c6 RE |
673 | #endif |
674 | ||
6b691a5c | 675 | int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, |
ae5c8664 MC |
676 | long *len) |
677 | { | |
678 | EVP_ENCODE_CTX ctx; | |
679 | 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 | nameB = BUF_MEM_new(); | |
686 | headerB = BUF_MEM_new(); | |
687 | dataB = BUF_MEM_new(); | |
688 | if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) { | |
689 | BUF_MEM_free(nameB); | |
690 | BUF_MEM_free(headerB); | |
691 | BUF_MEM_free(dataB); | |
692 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
693 | return (0); | |
694 | } | |
695 | ||
696 | buf[254] = '\0'; | |
697 | for (;;) { | |
698 | i = BIO_gets(bp, buf, 254); | |
699 | ||
700 | if (i <= 0) { | |
701 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE); | |
702 | goto err; | |
703 | } | |
704 | ||
705 | while ((i >= 0) && (buf[i] <= ' ')) | |
706 | i--; | |
707 | buf[++i] = '\n'; | |
708 | buf[++i] = '\0'; | |
709 | ||
710 | if (strncmp(buf, "-----BEGIN ", 11) == 0) { | |
711 | i = strlen(&(buf[11])); | |
712 | ||
713 | if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0) | |
714 | continue; | |
715 | if (!BUF_MEM_grow(nameB, i + 9)) { | |
716 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
717 | goto err; | |
718 | } | |
719 | memcpy(nameB->data, &(buf[11]), i - 6); | |
720 | nameB->data[i - 6] = '\0'; | |
721 | break; | |
722 | } | |
723 | } | |
724 | hl = 0; | |
725 | if (!BUF_MEM_grow(headerB, 256)) { | |
726 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
727 | goto err; | |
728 | } | |
729 | headerB->data[0] = '\0'; | |
730 | for (;;) { | |
731 | i = BIO_gets(bp, buf, 254); | |
732 | if (i <= 0) | |
733 | break; | |
734 | ||
735 | while ((i >= 0) && (buf[i] <= ' ')) | |
736 | i--; | |
737 | buf[++i] = '\n'; | |
738 | buf[++i] = '\0'; | |
739 | ||
740 | if (buf[0] == '\n') | |
741 | break; | |
742 | if (!BUF_MEM_grow(headerB, hl + i + 9)) { | |
743 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
744 | goto err; | |
745 | } | |
746 | if (strncmp(buf, "-----END ", 9) == 0) { | |
747 | nohead = 1; | |
748 | break; | |
749 | } | |
750 | memcpy(&(headerB->data[hl]), buf, i); | |
751 | headerB->data[hl + i] = '\0'; | |
752 | hl += i; | |
753 | } | |
754 | ||
755 | bl = 0; | |
756 | if (!BUF_MEM_grow(dataB, 1024)) { | |
757 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
758 | goto err; | |
759 | } | |
760 | dataB->data[0] = '\0'; | |
761 | if (!nohead) { | |
762 | for (;;) { | |
763 | i = BIO_gets(bp, buf, 254); | |
764 | if (i <= 0) | |
765 | break; | |
766 | ||
767 | while ((i >= 0) && (buf[i] <= ' ')) | |
768 | i--; | |
769 | buf[++i] = '\n'; | |
770 | buf[++i] = '\0'; | |
771 | ||
772 | if (i != 65) | |
773 | end = 1; | |
774 | if (strncmp(buf, "-----END ", 9) == 0) | |
775 | break; | |
776 | if (i > 65) | |
777 | break; | |
778 | if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) { | |
779 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
780 | goto err; | |
781 | } | |
782 | memcpy(&(dataB->data[bl]), buf, i); | |
783 | dataB->data[bl + i] = '\0'; | |
784 | bl += i; | |
785 | if (end) { | |
786 | buf[0] = '\0'; | |
787 | i = BIO_gets(bp, buf, 254); | |
788 | if (i <= 0) | |
789 | break; | |
790 | ||
791 | while ((i >= 0) && (buf[i] <= ' ')) | |
792 | i--; | |
793 | buf[++i] = '\n'; | |
794 | buf[++i] = '\0'; | |
795 | ||
796 | break; | |
797 | } | |
798 | } | |
799 | } else { | |
800 | tmpB = headerB; | |
801 | headerB = dataB; | |
802 | dataB = tmpB; | |
803 | bl = hl; | |
804 | } | |
805 | i = strlen(nameB->data); | |
806 | if ((strncmp(buf, "-----END ", 9) != 0) || | |
807 | (strncmp(nameB->data, &(buf[9]), i) != 0) || | |
808 | (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) { | |
809 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE); | |
810 | goto err; | |
811 | } | |
812 | ||
813 | EVP_DecodeInit(&ctx); | |
814 | i = EVP_DecodeUpdate(&ctx, | |
815 | (unsigned char *)dataB->data, &bl, | |
816 | (unsigned char *)dataB->data, bl); | |
817 | if (i < 0) { | |
818 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); | |
819 | goto err; | |
820 | } | |
821 | i = EVP_DecodeFinal(&ctx, (unsigned char *)&(dataB->data[bl]), &k); | |
822 | if (i < 0) { | |
823 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); | |
824 | goto err; | |
825 | } | |
826 | bl += k; | |
827 | ||
828 | if (bl == 0) | |
829 | goto err; | |
830 | *name = nameB->data; | |
831 | *header = headerB->data; | |
832 | *data = (unsigned char *)dataB->data; | |
833 | *len = bl; | |
834 | OPENSSL_free(nameB); | |
835 | OPENSSL_free(headerB); | |
836 | OPENSSL_free(dataB); | |
837 | return (1); | |
838 | err: | |
839 | BUF_MEM_free(nameB); | |
840 | BUF_MEM_free(headerB); | |
841 | BUF_MEM_free(dataB); | |
842 | 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". | |
d82e2718 DSH |
849 | */ |
850 | ||
e4263314 | 851 | int pem_check_suffix(const char *pem_str, const char *suffix) |
ae5c8664 MC |
852 | { |
853 | int pem_len = strlen(pem_str); | |
854 | int suffix_len = strlen(suffix); | |
855 | const char *p; | |
856 | if (suffix_len + 1 >= pem_len) | |
857 | return 0; | |
858 | p = pem_str + pem_len - suffix_len; | |
859 | if (strcmp(p, suffix)) | |
860 | return 0; | |
861 | p--; | |
862 | if (*p != ' ') | |
863 | return 0; | |
864 | return p - pem_str; | |
865 | } |