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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. | |
0f113f3e | 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). | |
0f113f3e | 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. | |
0f113f3e | 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 :-). | |
0f113f3e | 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)" | |
0f113f3e | 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. | |
0f113f3e | 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> |
b39fc560 | 61 | #include "internal/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> |
5fe736e5 | 69 | #include "internal/asn1_int.h" |
cf1b7d96 | 70 | #ifndef OPENSSL_NO_DES |
0f113f3e | 71 | # include <openssl/des.h> |
d02b48c6 | 72 | #endif |
01b8b3c7 | 73 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 74 | # include <openssl/engine.h> |
01b8b3c7 | 75 | #endif |
d02b48c6 | 76 | |
0f113f3e | 77 | #define MIN_LENGTH 4 |
d02b48c6 | 78 | |
0f113f3e | 79 | static int load_iv(char **fromp, unsigned char *to, int num); |
ce1b4fe1 | 80 | static int check_pem(const char *nm, const char *name); |
e4263314 | 81 | int pem_check_suffix(const char *pem_str, const char *suffix); |
1241126a DSH |
82 | |
83 | int PEM_def_callback(char *buf, int num, int w, void *key) | |
0f113f3e | 84 | { |
4b618848 | 85 | #ifdef OPENSSL_NO_STDIO |
0f113f3e MC |
86 | /* |
87 | * We should not ever call the default callback routine from windows. | |
88 | */ | |
89 | PEMerr(PEM_F_PEM_DEF_CALLBACK, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); | |
90 | return (-1); | |
d02b48c6 | 91 | #else |
0f113f3e MC |
92 | int i, j; |
93 | const char *prompt; | |
94 | if (key) { | |
95 | i = strlen(key); | |
96 | i = (i > num) ? num : i; | |
97 | memcpy(buf, key, i); | |
98 | return (i); | |
99 | } | |
100 | ||
101 | prompt = EVP_get_pw_prompt(); | |
102 | if (prompt == NULL) | |
103 | prompt = "Enter PEM pass phrase:"; | |
104 | ||
105 | for (;;) { | |
106 | i = EVP_read_pw_string_min(buf, MIN_LENGTH, num, prompt, w); | |
107 | if (i != 0) { | |
108 | PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD); | |
109 | memset(buf, 0, (unsigned int)num); | |
110 | return (-1); | |
111 | } | |
112 | j = strlen(buf); | |
113 | if (j < MIN_LENGTH) { | |
114 | fprintf(stderr, | |
115 | "phrase is too short, needs to be at least %d chars\n", | |
116 | MIN_LENGTH); | |
117 | } else | |
118 | break; | |
119 | } | |
120 | return (j); | |
d02b48c6 | 121 | #endif |
0f113f3e | 122 | } |
d02b48c6 | 123 | |
6b691a5c | 124 | void PEM_proc_type(char *buf, int type) |
0f113f3e MC |
125 | { |
126 | const char *str; | |
127 | ||
128 | if (type == PEM_TYPE_ENCRYPTED) | |
129 | str = "ENCRYPTED"; | |
130 | else if (type == PEM_TYPE_MIC_CLEAR) | |
131 | str = "MIC-CLEAR"; | |
132 | else if (type == PEM_TYPE_MIC_ONLY) | |
133 | str = "MIC-ONLY"; | |
134 | else | |
135 | str = "BAD-TYPE"; | |
136 | ||
7644a9ae RS |
137 | OPENSSL_strlcat(buf, "Proc-Type: 4,", PEM_BUFSIZE); |
138 | OPENSSL_strlcat(buf, str, PEM_BUFSIZE); | |
139 | OPENSSL_strlcat(buf, "\n", PEM_BUFSIZE); | |
0f113f3e | 140 | } |
d02b48c6 | 141 | |
6b691a5c | 142 | void PEM_dek_info(char *buf, const char *type, int len, char *str) |
0f113f3e MC |
143 | { |
144 | static const unsigned char map[17] = "0123456789ABCDEF"; | |
145 | long i; | |
146 | int j; | |
147 | ||
7644a9ae RS |
148 | OPENSSL_strlcat(buf, "DEK-Info: ", PEM_BUFSIZE); |
149 | OPENSSL_strlcat(buf, type, PEM_BUFSIZE); | |
150 | OPENSSL_strlcat(buf, ",", PEM_BUFSIZE); | |
0f113f3e MC |
151 | j = strlen(buf); |
152 | if (j + (len * 2) + 1 > PEM_BUFSIZE) | |
153 | return; | |
154 | for (i = 0; i < len; i++) { | |
155 | buf[j + i * 2] = map[(str[i] >> 4) & 0x0f]; | |
156 | buf[j + i * 2 + 1] = map[(str[i]) & 0x0f]; | |
157 | } | |
158 | buf[j + i * 2] = '\n'; | |
159 | buf[j + i * 2 + 1] = '\0'; | |
160 | } | |
d02b48c6 | 161 | |
4b618848 | 162 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 163 | void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, |
0f113f3e MC |
164 | pem_password_cb *cb, void *u) |
165 | { | |
166 | BIO *b; | |
167 | void *ret; | |
168 | ||
169 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
170 | PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB); | |
171 | return (0); | |
172 | } | |
173 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
174 | ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); | |
175 | BIO_free(b); | |
176 | return (ret); | |
177 | } | |
d02b48c6 RE |
178 | #endif |
179 | ||
ce1b4fe1 DSH |
180 | static int check_pem(const char *nm, const char *name) |
181 | { | |
0f113f3e | 182 | /* Normal matching nm and name */ |
86885c28 | 183 | if (strcmp(nm, name) == 0) |
0f113f3e MC |
184 | return 1; |
185 | ||
186 | /* Make PEM_STRING_EVP_PKEY match any private key */ | |
187 | ||
86885c28 | 188 | if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) { |
0f113f3e MC |
189 | int slen; |
190 | const EVP_PKEY_ASN1_METHOD *ameth; | |
86885c28 | 191 | if (strcmp(nm, PEM_STRING_PKCS8) == 0) |
0f113f3e | 192 | return 1; |
86885c28 | 193 | if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) |
0f113f3e MC |
194 | return 1; |
195 | slen = pem_check_suffix(nm, "PRIVATE KEY"); | |
196 | if (slen > 0) { | |
197 | /* | |
198 | * NB: ENGINE implementations wont contain a deprecated old | |
199 | * private key decode function so don't look for them. | |
200 | */ | |
201 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); | |
202 | if (ameth && ameth->old_priv_decode) | |
203 | return 1; | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
86885c28 | 208 | if (strcmp(name, PEM_STRING_PARAMETERS) == 0) { |
0f113f3e MC |
209 | int slen; |
210 | const EVP_PKEY_ASN1_METHOD *ameth; | |
211 | slen = pem_check_suffix(nm, "PARAMETERS"); | |
212 | if (slen > 0) { | |
213 | ENGINE *e; | |
214 | ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); | |
215 | if (ameth) { | |
216 | int r; | |
217 | if (ameth->param_decode) | |
218 | r = 1; | |
219 | else | |
220 | r = 0; | |
01b8b3c7 | 221 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
222 | if (e) |
223 | ENGINE_finish(e); | |
01b8b3c7 | 224 | #endif |
0f113f3e MC |
225 | return r; |
226 | } | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | /* If reading DH parameters handle X9.42 DH format too */ | |
86885c28 RS |
231 | if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0 |
232 | && strcmp(name, PEM_STRING_DHPARAMS) == 0) | |
0f113f3e | 233 | return 1; |
3e4585c8 | 234 | |
0f113f3e | 235 | /* Permit older strings */ |
ce1b4fe1 | 236 | |
86885c28 RS |
237 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
238 | && strcmp(name, PEM_STRING_X509) == 0) | |
0f113f3e | 239 | return 1; |
ce1b4fe1 | 240 | |
86885c28 RS |
241 | if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0 |
242 | && strcmp(name, PEM_STRING_X509_REQ) == 0) | |
0f113f3e | 243 | return 1; |
ce1b4fe1 | 244 | |
0f113f3e | 245 | /* Allow normal certs to be read as trusted certs */ |
86885c28 RS |
246 | if (strcmp(nm, PEM_STRING_X509) == 0 |
247 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 248 | return 1; |
ce1b4fe1 | 249 | |
86885c28 RS |
250 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
251 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 252 | return 1; |
ce1b4fe1 | 253 | |
0f113f3e | 254 | /* Some CAs use PKCS#7 with CERTIFICATE headers */ |
86885c28 RS |
255 | if (strcmp(nm, PEM_STRING_X509) == 0 |
256 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 257 | return 1; |
3142c86d | 258 | |
86885c28 RS |
259 | if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0 |
260 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 261 | return 1; |
2401debe | 262 | |
8931b30d | 263 | #ifndef OPENSSL_NO_CMS |
86885c28 RS |
264 | if (strcmp(nm, PEM_STRING_X509) == 0 |
265 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e MC |
266 | return 1; |
267 | /* Allow CMS to be read from PKCS#7 headers */ | |
86885c28 RS |
268 | if (strcmp(nm, PEM_STRING_PKCS7) == 0 |
269 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e | 270 | return 1; |
8931b30d DSH |
271 | #endif |
272 | ||
0f113f3e | 273 | return 0; |
ce1b4fe1 DSH |
274 | } |
275 | ||
0f113f3e MC |
276 | int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, |
277 | const char *name, BIO *bp, pem_password_cb *cb, | |
278 | void *u) | |
279 | { | |
280 | EVP_CIPHER_INFO cipher; | |
281 | char *nm = NULL, *header = NULL; | |
282 | unsigned char *data = NULL; | |
283 | long len; | |
284 | int ret = 0; | |
285 | ||
286 | for (;;) { | |
287 | if (!PEM_read_bio(bp, &nm, &header, &data, &len)) { | |
288 | if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) | |
289 | ERR_add_error_data(2, "Expecting: ", name); | |
290 | return 0; | |
291 | } | |
292 | if (check_pem(nm, name)) | |
293 | break; | |
294 | OPENSSL_free(nm); | |
295 | OPENSSL_free(header); | |
296 | OPENSSL_free(data); | |
297 | } | |
298 | if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) | |
299 | goto err; | |
300 | if (!PEM_do_header(&cipher, data, &len, cb, u)) | |
301 | goto err; | |
302 | ||
303 | *pdata = data; | |
304 | *plen = len; | |
305 | ||
306 | if (pnm) | |
307 | *pnm = nm; | |
308 | ||
309 | ret = 1; | |
310 | ||
311 | err: | |
312 | if (!ret || !pnm) | |
313 | OPENSSL_free(nm); | |
314 | OPENSSL_free(header); | |
315 | if (!ret) | |
316 | OPENSSL_free(data); | |
317 | return ret; | |
318 | } | |
d02b48c6 | 319 | |
4b618848 | 320 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 321 | int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, |
0f113f3e MC |
322 | void *x, const EVP_CIPHER *enc, unsigned char *kstr, |
323 | int klen, pem_password_cb *callback, void *u) | |
324 | { | |
325 | BIO *b; | |
326 | int ret; | |
327 | ||
328 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
329 | PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB); | |
330 | return (0); | |
331 | } | |
332 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
333 | ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); | |
334 | BIO_free(b); | |
335 | return (ret); | |
336 | } | |
d02b48c6 RE |
337 | #endif |
338 | ||
8bb826ee | 339 | int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, |
0f113f3e MC |
340 | void *x, const EVP_CIPHER *enc, unsigned char *kstr, |
341 | int klen, pem_password_cb *callback, void *u) | |
342 | { | |
343 | EVP_CIPHER_CTX ctx; | |
4c9b0a03 | 344 | int dsize = 0, i = 0, j = 0, ret = 0; |
0f113f3e MC |
345 | unsigned char *p, *data = NULL; |
346 | const char *objstr = NULL; | |
347 | char buf[PEM_BUFSIZE]; | |
348 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
349 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
350 | ||
351 | if (enc != NULL) { | |
352 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); | |
353 | if (objstr == NULL) { | |
354 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER); | |
355 | goto err; | |
356 | } | |
357 | } | |
358 | ||
359 | if ((dsize = i2d(x, NULL)) < 0) { | |
360 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB); | |
361 | dsize = 0; | |
362 | goto err; | |
363 | } | |
364 | /* dzise + 8 bytes are needed */ | |
365 | /* actually it needs the cipher block size extra... */ | |
b196e7d9 | 366 | data = OPENSSL_malloc((unsigned int)dsize + 20); |
0f113f3e MC |
367 | if (data == NULL) { |
368 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE); | |
369 | goto err; | |
370 | } | |
371 | p = data; | |
372 | i = i2d(x, &p); | |
373 | ||
374 | if (enc != NULL) { | |
375 | if (kstr == NULL) { | |
376 | if (callback == NULL) | |
377 | klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); | |
378 | else | |
379 | klen = (*callback) (buf, PEM_BUFSIZE, 1, u); | |
380 | if (klen <= 0) { | |
381 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY); | |
382 | goto err; | |
383 | } | |
a53955d8 | 384 | #ifdef CHARSET_EBCDIC |
0f113f3e MC |
385 | /* Convert the pass phrase from EBCDIC */ |
386 | ebcdic2ascii(buf, buf, klen); | |
a53955d8 | 387 | #endif |
0f113f3e MC |
388 | kstr = (unsigned char *)buf; |
389 | } | |
390 | RAND_add(data, i, 0); /* put in the RSA key. */ | |
391 | OPENSSL_assert(enc->iv_len <= (int)sizeof(iv)); | |
266483d2 | 392 | if (RAND_bytes(iv, enc->iv_len) <= 0) /* Generate a salt */ |
0f113f3e MC |
393 | goto err; |
394 | /* | |
395 | * The 'iv' is used as the iv and as a salt. It is NOT taken from | |
396 | * the BytesToKey function | |
397 | */ | |
398 | if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) | |
399 | goto err; | |
400 | ||
401 | if (kstr == (unsigned char *)buf) | |
402 | OPENSSL_cleanse(buf, PEM_BUFSIZE); | |
403 | ||
404 | OPENSSL_assert(strlen(objstr) + 23 + 2 * enc->iv_len + 13 <= | |
405 | sizeof buf); | |
406 | ||
407 | buf[0] = '\0'; | |
408 | PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); | |
409 | PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv); | |
410 | /* k=strlen(buf); */ | |
411 | ||
412 | EVP_CIPHER_CTX_init(&ctx); | |
413 | ret = 1; | |
414 | if (!EVP_EncryptInit_ex(&ctx, enc, NULL, key, iv) | |
415 | || !EVP_EncryptUpdate(&ctx, data, &j, data, i) | |
416 | || !EVP_EncryptFinal_ex(&ctx, &(data[j]), &i)) | |
417 | ret = 0; | |
418 | EVP_CIPHER_CTX_cleanup(&ctx); | |
419 | if (ret == 0) | |
420 | goto err; | |
421 | i += j; | |
422 | } else { | |
423 | ret = 1; | |
424 | buf[0] = '\0'; | |
425 | } | |
426 | i = PEM_write_bio(bp, name, buf, data, i); | |
427 | if (i <= 0) | |
428 | ret = 0; | |
429 | err: | |
430 | OPENSSL_cleanse(key, sizeof(key)); | |
431 | OPENSSL_cleanse(iv, sizeof(iv)); | |
432 | OPENSSL_cleanse((char *)&ctx, sizeof(ctx)); | |
433 | OPENSSL_cleanse(buf, PEM_BUFSIZE); | |
4b45c6e5 | 434 | OPENSSL_clear_free(data, (unsigned int)dsize); |
0f113f3e MC |
435 | return (ret); |
436 | } | |
d02b48c6 | 437 | |
6b691a5c | 438 | int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, |
0f113f3e MC |
439 | pem_password_cb *callback, void *u) |
440 | { | |
441 | int i = 0, j, o, klen; | |
442 | long len; | |
443 | EVP_CIPHER_CTX ctx; | |
444 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
445 | char buf[PEM_BUFSIZE]; | |
446 | ||
447 | len = *plen; | |
448 | ||
449 | if (cipher->cipher == NULL) | |
450 | return (1); | |
451 | if (callback == NULL) | |
452 | klen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); | |
453 | else | |
454 | klen = callback(buf, PEM_BUFSIZE, 0, u); | |
455 | if (klen <= 0) { | |
456 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ); | |
457 | return (0); | |
458 | } | |
a53955d8 | 459 | #ifdef CHARSET_EBCDIC |
0f113f3e MC |
460 | /* Convert the pass phrase from EBCDIC */ |
461 | ebcdic2ascii(buf, buf, klen); | |
a53955d8 UM |
462 | #endif |
463 | ||
0f113f3e MC |
464 | if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), |
465 | (unsigned char *)buf, klen, 1, key, NULL)) | |
466 | return 0; | |
467 | ||
468 | j = (int)len; | |
469 | EVP_CIPHER_CTX_init(&ctx); | |
470 | o = EVP_DecryptInit_ex(&ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); | |
471 | if (o) | |
472 | o = EVP_DecryptUpdate(&ctx, data, &i, data, j); | |
473 | if (o) | |
474 | o = EVP_DecryptFinal_ex(&ctx, &(data[i]), &j); | |
475 | EVP_CIPHER_CTX_cleanup(&ctx); | |
476 | OPENSSL_cleanse((char *)buf, sizeof(buf)); | |
477 | OPENSSL_cleanse((char *)key, sizeof(key)); | |
478 | if (o) | |
479 | j += i; | |
480 | else { | |
481 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); | |
482 | return (0); | |
483 | } | |
484 | *plen = j; | |
485 | return (1); | |
486 | } | |
d02b48c6 | 487 | |
6b691a5c | 488 | int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
0f113f3e MC |
489 | { |
490 | const EVP_CIPHER *enc = NULL; | |
491 | char *p, c; | |
492 | char **header_pp = &header; | |
493 | ||
494 | cipher->cipher = NULL; | |
495 | if ((header == NULL) || (*header == '\0') || (*header == '\n')) | |
496 | return (1); | |
497 | if (strncmp(header, "Proc-Type: ", 11) != 0) { | |
498 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); | |
499 | return (0); | |
500 | } | |
501 | header += 11; | |
502 | if (*header != '4') | |
503 | return (0); | |
504 | header++; | |
505 | if (*header != ',') | |
506 | return (0); | |
507 | header++; | |
508 | if (strncmp(header, "ENCRYPTED", 9) != 0) { | |
509 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); | |
510 | return (0); | |
511 | } | |
512 | for (; (*header != '\n') && (*header != '\0'); header++) ; | |
513 | if (*header == '\0') { | |
514 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); | |
515 | return (0); | |
516 | } | |
517 | header++; | |
518 | if (strncmp(header, "DEK-Info: ", 10) != 0) { | |
519 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); | |
520 | return (0); | |
521 | } | |
522 | header += 10; | |
523 | ||
524 | p = header; | |
525 | for (;;) { | |
526 | c = *header; | |
a53955d8 | 527 | #ifndef CHARSET_EBCDIC |
0f113f3e MC |
528 | if (!(((c >= 'A') && (c <= 'Z')) || (c == '-') || |
529 | ((c >= '0') && (c <= '9')))) | |
530 | break; | |
a53955d8 | 531 | #else |
0f113f3e MC |
532 | if (!(isupper(c) || (c == '-') || isdigit(c))) |
533 | break; | |
a53955d8 | 534 | #endif |
0f113f3e MC |
535 | header++; |
536 | } | |
537 | *header = '\0'; | |
538 | cipher->cipher = enc = EVP_get_cipherbyname(p); | |
539 | *header = c; | |
540 | header++; | |
541 | ||
542 | if (enc == NULL) { | |
543 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); | |
544 | return (0); | |
545 | } | |
546 | if (!load_iv(header_pp, &(cipher->iv[0]), enc->iv_len)) | |
547 | return (0); | |
548 | ||
549 | return (1); | |
550 | } | |
d02b48c6 | 551 | |
8c3c5701 | 552 | static int load_iv(char **fromp, unsigned char *to, int num) |
0f113f3e MC |
553 | { |
554 | int v, i; | |
555 | char *from; | |
556 | ||
557 | from = *fromp; | |
558 | for (i = 0; i < num; i++) | |
559 | to[i] = 0; | |
560 | num *= 2; | |
561 | for (i = 0; i < num; i++) { | |
562 | if ((*from >= '0') && (*from <= '9')) | |
563 | v = *from - '0'; | |
564 | else if ((*from >= 'A') && (*from <= 'F')) | |
565 | v = *from - 'A' + 10; | |
566 | else if ((*from >= 'a') && (*from <= 'f')) | |
567 | v = *from - 'a' + 10; | |
568 | else { | |
569 | PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS); | |
570 | return (0); | |
571 | } | |
572 | from++; | |
573 | to[i / 2] |= v << (long)((!(i & 1)) * 4); | |
574 | } | |
575 | ||
576 | *fromp = from; | |
577 | return (1); | |
578 | } | |
d02b48c6 | 579 | |
4b618848 | 580 | #ifndef OPENSSL_NO_STDIO |
edf92f1c | 581 | int PEM_write(FILE *fp, const char *name, const char *header, |
0f113f3e MC |
582 | const unsigned char *data, long len) |
583 | { | |
584 | BIO *b; | |
585 | int ret; | |
586 | ||
587 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
588 | PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB); | |
589 | return (0); | |
590 | } | |
591 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
592 | ret = PEM_write_bio(b, name, header, data, len); | |
593 | BIO_free(b); | |
594 | return (ret); | |
595 | } | |
d02b48c6 RE |
596 | #endif |
597 | ||
edf92f1c | 598 | int PEM_write_bio(BIO *bp, const char *name, const char *header, |
0f113f3e MC |
599 | const unsigned char *data, long len) |
600 | { | |
601 | int nlen, n, i, j, outl; | |
602 | unsigned char *buf = NULL; | |
601ab315 | 603 | EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); |
0f113f3e MC |
604 | int reason = ERR_R_BUF_LIB; |
605 | ||
601ab315 RL |
606 | if (ctx == NULL) { |
607 | reason = ERR_R_MALLOC_FAILURE; | |
608 | goto err; | |
609 | } | |
610 | ||
611 | EVP_EncodeInit(ctx); | |
0f113f3e MC |
612 | nlen = strlen(name); |
613 | ||
614 | if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || | |
615 | (BIO_write(bp, name, nlen) != nlen) || | |
616 | (BIO_write(bp, "-----\n", 6) != 6)) | |
617 | goto err; | |
618 | ||
619 | i = strlen(header); | |
620 | if (i > 0) { | |
621 | if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) | |
622 | goto err; | |
623 | } | |
624 | ||
625 | buf = OPENSSL_malloc(PEM_BUFSIZE * 8); | |
626 | if (buf == NULL) { | |
627 | reason = ERR_R_MALLOC_FAILURE; | |
628 | goto err; | |
629 | } | |
630 | ||
631 | i = j = 0; | |
632 | while (len > 0) { | |
633 | n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); | |
601ab315 | 634 | EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n); |
0f113f3e MC |
635 | if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) |
636 | goto err; | |
637 | i += outl; | |
638 | len -= n; | |
639 | j += n; | |
640 | } | |
601ab315 | 641 | EVP_EncodeFinal(ctx, buf, &outl); |
0f113f3e MC |
642 | if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) |
643 | goto err; | |
0f113f3e MC |
644 | if ((BIO_write(bp, "-----END ", 9) != 9) || |
645 | (BIO_write(bp, name, nlen) != nlen) || | |
646 | (BIO_write(bp, "-----\n", 6) != 6)) | |
647 | goto err; | |
601ab315 RL |
648 | OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
649 | EVP_ENCODE_CTX_free(ctx); | |
0f113f3e MC |
650 | return (i + outl); |
651 | err: | |
4b45c6e5 | 652 | OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
601ab315 | 653 | EVP_ENCODE_CTX_free(ctx); |
0f113f3e MC |
654 | PEMerr(PEM_F_PEM_WRITE_BIO, reason); |
655 | return (0); | |
656 | } | |
d02b48c6 | 657 | |
4b618848 | 658 | #ifndef OPENSSL_NO_STDIO |
6b691a5c | 659 | int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, |
0f113f3e MC |
660 | long *len) |
661 | { | |
662 | BIO *b; | |
663 | int ret; | |
664 | ||
665 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
666 | PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB); | |
667 | return (0); | |
668 | } | |
669 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
670 | ret = PEM_read_bio(b, name, header, data, len); | |
671 | BIO_free(b); | |
672 | return (ret); | |
673 | } | |
d02b48c6 RE |
674 | #endif |
675 | ||
6b691a5c | 676 | int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, |
0f113f3e MC |
677 | long *len) |
678 | { | |
601ab315 | 679 | EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); |
0f113f3e MC |
680 | int end = 0, i, k, bl = 0, hl = 0, nohead = 0; |
681 | char buf[256]; | |
682 | BUF_MEM *nameB; | |
683 | BUF_MEM *headerB; | |
684 | BUF_MEM *dataB, *tmpB; | |
685 | ||
601ab315 RL |
686 | if (ctx == NULL) { |
687 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
688 | return (0); | |
689 | } | |
690 | ||
0f113f3e MC |
691 | nameB = BUF_MEM_new(); |
692 | headerB = BUF_MEM_new(); | |
693 | dataB = BUF_MEM_new(); | |
694 | if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL)) { | |
601ab315 | 695 | goto err; |
0f113f3e MC |
696 | } |
697 | ||
698 | buf[254] = '\0'; | |
699 | for (;;) { | |
700 | i = BIO_gets(bp, buf, 254); | |
701 | ||
702 | if (i <= 0) { | |
703 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_NO_START_LINE); | |
704 | goto err; | |
705 | } | |
706 | ||
707 | while ((i >= 0) && (buf[i] <= ' ')) | |
708 | i--; | |
709 | buf[++i] = '\n'; | |
710 | buf[++i] = '\0'; | |
711 | ||
712 | if (strncmp(buf, "-----BEGIN ", 11) == 0) { | |
713 | i = strlen(&(buf[11])); | |
714 | ||
715 | if (strncmp(&(buf[11 + i - 6]), "-----\n", 6) != 0) | |
716 | continue; | |
717 | if (!BUF_MEM_grow(nameB, i + 9)) { | |
718 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
719 | goto err; | |
720 | } | |
721 | memcpy(nameB->data, &(buf[11]), i - 6); | |
722 | nameB->data[i - 6] = '\0'; | |
723 | break; | |
724 | } | |
725 | } | |
726 | hl = 0; | |
727 | if (!BUF_MEM_grow(headerB, 256)) { | |
728 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
729 | goto err; | |
730 | } | |
731 | headerB->data[0] = '\0'; | |
732 | for (;;) { | |
733 | i = BIO_gets(bp, buf, 254); | |
734 | if (i <= 0) | |
735 | break; | |
736 | ||
737 | while ((i >= 0) && (buf[i] <= ' ')) | |
738 | i--; | |
739 | buf[++i] = '\n'; | |
740 | buf[++i] = '\0'; | |
741 | ||
742 | if (buf[0] == '\n') | |
743 | break; | |
744 | if (!BUF_MEM_grow(headerB, hl + i + 9)) { | |
745 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
746 | goto err; | |
747 | } | |
748 | if (strncmp(buf, "-----END ", 9) == 0) { | |
749 | nohead = 1; | |
750 | break; | |
751 | } | |
752 | memcpy(&(headerB->data[hl]), buf, i); | |
753 | headerB->data[hl + i] = '\0'; | |
754 | hl += i; | |
755 | } | |
756 | ||
757 | bl = 0; | |
758 | if (!BUF_MEM_grow(dataB, 1024)) { | |
759 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
760 | goto err; | |
761 | } | |
762 | dataB->data[0] = '\0'; | |
763 | if (!nohead) { | |
764 | for (;;) { | |
765 | i = BIO_gets(bp, buf, 254); | |
766 | if (i <= 0) | |
767 | break; | |
768 | ||
769 | while ((i >= 0) && (buf[i] <= ' ')) | |
770 | i--; | |
771 | buf[++i] = '\n'; | |
772 | buf[++i] = '\0'; | |
773 | ||
774 | if (i != 65) | |
775 | end = 1; | |
776 | if (strncmp(buf, "-----END ", 9) == 0) | |
777 | break; | |
778 | if (i > 65) | |
779 | break; | |
780 | if (!BUF_MEM_grow_clean(dataB, i + bl + 9)) { | |
781 | PEMerr(PEM_F_PEM_READ_BIO, ERR_R_MALLOC_FAILURE); | |
782 | goto err; | |
783 | } | |
784 | memcpy(&(dataB->data[bl]), buf, i); | |
785 | dataB->data[bl + i] = '\0'; | |
786 | bl += i; | |
787 | if (end) { | |
788 | buf[0] = '\0'; | |
789 | i = BIO_gets(bp, buf, 254); | |
790 | if (i <= 0) | |
791 | break; | |
792 | ||
793 | while ((i >= 0) && (buf[i] <= ' ')) | |
794 | i--; | |
795 | buf[++i] = '\n'; | |
796 | buf[++i] = '\0'; | |
797 | ||
798 | break; | |
799 | } | |
800 | } | |
801 | } else { | |
802 | tmpB = headerB; | |
803 | headerB = dataB; | |
804 | dataB = tmpB; | |
805 | bl = hl; | |
806 | } | |
807 | i = strlen(nameB->data); | |
808 | if ((strncmp(buf, "-----END ", 9) != 0) || | |
809 | (strncmp(nameB->data, &(buf[9]), i) != 0) || | |
810 | (strncmp(&(buf[9 + i]), "-----\n", 6) != 0)) { | |
811 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_END_LINE); | |
812 | goto err; | |
813 | } | |
814 | ||
601ab315 RL |
815 | EVP_DecodeInit(ctx); |
816 | i = EVP_DecodeUpdate(ctx, | |
0f113f3e MC |
817 | (unsigned char *)dataB->data, &bl, |
818 | (unsigned char *)dataB->data, bl); | |
819 | if (i < 0) { | |
820 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); | |
821 | goto err; | |
822 | } | |
601ab315 | 823 | i = EVP_DecodeFinal(ctx, (unsigned char *)&(dataB->data[bl]), &k); |
0f113f3e MC |
824 | if (i < 0) { |
825 | PEMerr(PEM_F_PEM_READ_BIO, PEM_R_BAD_BASE64_DECODE); | |
826 | goto err; | |
827 | } | |
828 | bl += k; | |
829 | ||
830 | if (bl == 0) | |
831 | goto err; | |
832 | *name = nameB->data; | |
833 | *header = headerB->data; | |
834 | *data = (unsigned char *)dataB->data; | |
835 | *len = bl; | |
836 | OPENSSL_free(nameB); | |
837 | OPENSSL_free(headerB); | |
838 | OPENSSL_free(dataB); | |
601ab315 | 839 | EVP_ENCODE_CTX_free(ctx); |
0f113f3e MC |
840 | return (1); |
841 | err: | |
842 | BUF_MEM_free(nameB); | |
843 | BUF_MEM_free(headerB); | |
844 | BUF_MEM_free(dataB); | |
601ab315 | 845 | EVP_ENCODE_CTX_free(ctx); |
0f113f3e MC |
846 | return (0); |
847 | } | |
848 | ||
849 | /* | |
850 | * Check pem string and return prefix length. If for example the pem_str == | |
851 | * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the | |
852 | * string "RSA". | |
d82e2718 DSH |
853 | */ |
854 | ||
e4263314 | 855 | int pem_check_suffix(const char *pem_str, const char *suffix) |
0f113f3e MC |
856 | { |
857 | int pem_len = strlen(pem_str); | |
858 | int suffix_len = strlen(suffix); | |
859 | const char *p; | |
860 | if (suffix_len + 1 >= pem_len) | |
861 | return 0; | |
862 | p = pem_str + pem_len - suffix_len; | |
863 | if (strcmp(p, suffix)) | |
864 | return 0; | |
865 | p--; | |
866 | if (*p != ' ') | |
867 | return 0; | |
868 | return p - pem_str; | |
869 | } |