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