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Commit | Line | Data |
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62867571 | 1 | /* |
86ba26c8 | 2 | * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
62867571 RS |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
a1df06b3 | 11 | #include "internal/ctype.h" |
67787844 | 12 | #include <string.h> |
b39fc560 | 13 | #include "internal/cryptlib.h" |
ec577822 BM |
14 | #include <openssl/buffer.h> |
15 | #include <openssl/objects.h> | |
16 | #include <openssl/evp.h> | |
17 | #include <openssl/rand.h> | |
18 | #include <openssl/x509.h> | |
19 | #include <openssl/pem.h> | |
095ce353 | 20 | #include <openssl/pkcs12.h> |
5fe736e5 | 21 | #include "internal/asn1_int.h" |
3c27208f RS |
22 | #include <openssl/des.h> |
23 | #include <openssl/engine.h> | |
d02b48c6 | 24 | |
0f113f3e | 25 | #define MIN_LENGTH 4 |
d02b48c6 | 26 | |
0f113f3e | 27 | static int load_iv(char **fromp, unsigned char *to, int num); |
ce1b4fe1 | 28 | static int check_pem(const char *nm, const char *name); |
e4263314 | 29 | int pem_check_suffix(const char *pem_str, const char *suffix); |
1241126a DSH |
30 | |
31 | int PEM_def_callback(char *buf, int num, int w, void *key) | |
0f113f3e | 32 | { |
0f113f3e MC |
33 | int i, j; |
34 | const char *prompt; | |
af9895cb | 35 | |
0f113f3e MC |
36 | if (key) { |
37 | i = strlen(key); | |
38 | i = (i > num) ? num : i; | |
39 | memcpy(buf, key, i); | |
af9895cb | 40 | return i; |
0f113f3e MC |
41 | } |
42 | ||
43 | prompt = EVP_get_pw_prompt(); | |
44 | if (prompt == NULL) | |
45 | prompt = "Enter PEM pass phrase:"; | |
46 | ||
47 | for (;;) { | |
b160f282 RL |
48 | /* |
49 | * We assume that w == 0 means decryption, | |
50 | * while w == 1 means encryption | |
51 | */ | |
52 | int min_len = w ? MIN_LENGTH : 0; | |
53 | ||
54 | i = EVP_read_pw_string_min(buf, min_len, num, prompt, w); | |
0f113f3e MC |
55 | if (i != 0) { |
56 | PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD); | |
57 | memset(buf, 0, (unsigned int)num); | |
af9895cb | 58 | return -1; |
0f113f3e MC |
59 | } |
60 | j = strlen(buf); | |
b160f282 | 61 | if (min_len && j < min_len) { |
0f113f3e MC |
62 | fprintf(stderr, |
63 | "phrase is too short, needs to be at least %d chars\n", | |
b160f282 | 64 | min_len); |
0f113f3e MC |
65 | } else |
66 | break; | |
67 | } | |
af9895cb | 68 | return j; |
0f113f3e | 69 | } |
d02b48c6 | 70 | |
6b691a5c | 71 | void PEM_proc_type(char *buf, int type) |
0f113f3e MC |
72 | { |
73 | const char *str; | |
86ba26c8 | 74 | char *p = buf + strlen(buf); |
0f113f3e MC |
75 | |
76 | if (type == PEM_TYPE_ENCRYPTED) | |
77 | str = "ENCRYPTED"; | |
78 | else if (type == PEM_TYPE_MIC_CLEAR) | |
79 | str = "MIC-CLEAR"; | |
80 | else if (type == PEM_TYPE_MIC_ONLY) | |
81 | str = "MIC-ONLY"; | |
82 | else | |
83 | str = "BAD-TYPE"; | |
84 | ||
86ba26c8 | 85 | BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str); |
0f113f3e | 86 | } |
d02b48c6 | 87 | |
6b691a5c | 88 | void PEM_dek_info(char *buf, const char *type, int len, char *str) |
0f113f3e | 89 | { |
0f113f3e | 90 | long i; |
86ba26c8 P |
91 | char *p = buf + strlen(buf); |
92 | int j = PEM_BUFSIZE - (size_t)(p - buf), n; | |
93 | ||
94 | n = BIO_snprintf(p, j, "DEK-Info: %s,", type); | |
95 | if (n > 0) { | |
96 | j -= n; | |
97 | p += n; | |
98 | for (i = 0; i < len; i++) { | |
99 | n = BIO_snprintf(p, j, "%02X", 0xff & str[i]); | |
100 | if (n <= 0) | |
101 | return; | |
102 | j -= n; | |
103 | p += n; | |
104 | } | |
105 | if (j > 1) | |
106 | strcpy(p, "\n"); | |
0f113f3e | 107 | } |
0f113f3e | 108 | } |
d02b48c6 | 109 | |
4b618848 | 110 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 111 | void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, |
0f113f3e MC |
112 | pem_password_cb *cb, void *u) |
113 | { | |
114 | BIO *b; | |
115 | void *ret; | |
116 | ||
117 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
118 | PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB); | |
b4df712a | 119 | return 0; |
0f113f3e MC |
120 | } |
121 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
122 | ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); | |
123 | BIO_free(b); | |
b4df712a | 124 | return ret; |
0f113f3e | 125 | } |
d02b48c6 RE |
126 | #endif |
127 | ||
ce1b4fe1 DSH |
128 | static int check_pem(const char *nm, const char *name) |
129 | { | |
0f113f3e | 130 | /* Normal matching nm and name */ |
86885c28 | 131 | if (strcmp(nm, name) == 0) |
0f113f3e MC |
132 | return 1; |
133 | ||
134 | /* Make PEM_STRING_EVP_PKEY match any private key */ | |
135 | ||
86885c28 | 136 | if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) { |
0f113f3e MC |
137 | int slen; |
138 | const EVP_PKEY_ASN1_METHOD *ameth; | |
86885c28 | 139 | if (strcmp(nm, PEM_STRING_PKCS8) == 0) |
0f113f3e | 140 | return 1; |
86885c28 | 141 | if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) |
0f113f3e MC |
142 | return 1; |
143 | slen = pem_check_suffix(nm, "PRIVATE KEY"); | |
144 | if (slen > 0) { | |
145 | /* | |
60250017 | 146 | * NB: ENGINE implementations won't contain a deprecated old |
0f113f3e MC |
147 | * private key decode function so don't look for them. |
148 | */ | |
149 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); | |
150 | if (ameth && ameth->old_priv_decode) | |
151 | return 1; | |
152 | } | |
153 | return 0; | |
154 | } | |
155 | ||
86885c28 | 156 | if (strcmp(name, PEM_STRING_PARAMETERS) == 0) { |
0f113f3e MC |
157 | int slen; |
158 | const EVP_PKEY_ASN1_METHOD *ameth; | |
159 | slen = pem_check_suffix(nm, "PARAMETERS"); | |
160 | if (slen > 0) { | |
161 | ENGINE *e; | |
162 | ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); | |
163 | if (ameth) { | |
164 | int r; | |
165 | if (ameth->param_decode) | |
166 | r = 1; | |
167 | else | |
168 | r = 0; | |
01b8b3c7 | 169 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 170 | ENGINE_finish(e); |
01b8b3c7 | 171 | #endif |
0f113f3e MC |
172 | return r; |
173 | } | |
174 | } | |
175 | return 0; | |
176 | } | |
177 | /* If reading DH parameters handle X9.42 DH format too */ | |
86885c28 RS |
178 | if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0 |
179 | && strcmp(name, PEM_STRING_DHPARAMS) == 0) | |
0f113f3e | 180 | return 1; |
3e4585c8 | 181 | |
0f113f3e | 182 | /* Permit older strings */ |
ce1b4fe1 | 183 | |
86885c28 RS |
184 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
185 | && strcmp(name, PEM_STRING_X509) == 0) | |
0f113f3e | 186 | return 1; |
ce1b4fe1 | 187 | |
86885c28 RS |
188 | if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0 |
189 | && strcmp(name, PEM_STRING_X509_REQ) == 0) | |
0f113f3e | 190 | return 1; |
ce1b4fe1 | 191 | |
0f113f3e | 192 | /* Allow normal certs to be read as trusted certs */ |
86885c28 RS |
193 | if (strcmp(nm, PEM_STRING_X509) == 0 |
194 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 195 | return 1; |
ce1b4fe1 | 196 | |
86885c28 RS |
197 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
198 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 199 | return 1; |
ce1b4fe1 | 200 | |
0f113f3e | 201 | /* Some CAs use PKCS#7 with CERTIFICATE headers */ |
86885c28 RS |
202 | if (strcmp(nm, PEM_STRING_X509) == 0 |
203 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 204 | return 1; |
3142c86d | 205 | |
86885c28 RS |
206 | if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0 |
207 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 208 | return 1; |
2401debe | 209 | |
8931b30d | 210 | #ifndef OPENSSL_NO_CMS |
86885c28 RS |
211 | if (strcmp(nm, PEM_STRING_X509) == 0 |
212 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e MC |
213 | return 1; |
214 | /* Allow CMS to be read from PKCS#7 headers */ | |
86885c28 RS |
215 | if (strcmp(nm, PEM_STRING_PKCS7) == 0 |
216 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e | 217 | return 1; |
8931b30d DSH |
218 | #endif |
219 | ||
0f113f3e | 220 | return 0; |
ce1b4fe1 DSH |
221 | } |
222 | ||
2ca8bbe5 | 223 | static void pem_free(void *p, unsigned int flags, size_t num) |
204afd81 BK |
224 | { |
225 | if (flags & PEM_FLAG_SECURE) | |
2ca8bbe5 | 226 | OPENSSL_secure_clear_free(p, num); |
204afd81 BK |
227 | else |
228 | OPENSSL_free(p); | |
229 | } | |
230 | ||
231 | static void *pem_malloc(int num, unsigned int flags) | |
232 | { | |
233 | return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num) | |
234 | : OPENSSL_malloc(num); | |
235 | } | |
236 | ||
7671342e BK |
237 | static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen, |
238 | char **pnm, const char *name, BIO *bp, | |
239 | pem_password_cb *cb, void *u, | |
240 | unsigned int flags) | |
0f113f3e MC |
241 | { |
242 | EVP_CIPHER_INFO cipher; | |
243 | char *nm = NULL, *header = NULL; | |
244 | unsigned char *data = NULL; | |
2ca8bbe5 | 245 | long len = 0; |
0f113f3e MC |
246 | int ret = 0; |
247 | ||
7671342e | 248 | do { |
2ca8bbe5 BE |
249 | pem_free(nm, flags, 0); |
250 | pem_free(header, flags, 0); | |
251 | pem_free(data, flags, len); | |
7671342e | 252 | if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) { |
0f113f3e MC |
253 | if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) |
254 | ERR_add_error_data(2, "Expecting: ", name); | |
255 | return 0; | |
256 | } | |
7671342e | 257 | } while (!check_pem(nm, name)); |
0f113f3e MC |
258 | if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) |
259 | goto err; | |
260 | if (!PEM_do_header(&cipher, data, &len, cb, u)) | |
261 | goto err; | |
262 | ||
263 | *pdata = data; | |
264 | *plen = len; | |
265 | ||
7671342e | 266 | if (pnm != NULL) |
0f113f3e MC |
267 | *pnm = nm; |
268 | ||
269 | ret = 1; | |
270 | ||
271 | err: | |
7671342e | 272 | if (!ret || pnm == NULL) |
2ca8bbe5 BE |
273 | pem_free(nm, flags, 0); |
274 | pem_free(header, flags, 0); | |
0f113f3e | 275 | if (!ret) |
2ca8bbe5 | 276 | pem_free(data, flags, len); |
0f113f3e MC |
277 | return ret; |
278 | } | |
d02b48c6 | 279 | |
7671342e BK |
280 | int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, |
281 | const char *name, BIO *bp, pem_password_cb *cb, | |
282 | void *u) { | |
283 | return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, | |
284 | PEM_FLAG_EAY_COMPATIBLE); | |
285 | } | |
286 | ||
287 | int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm, | |
288 | const char *name, BIO *bp, pem_password_cb *cb, | |
289 | void *u) { | |
290 | return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, | |
291 | PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE); | |
292 | } | |
293 | ||
4b618848 | 294 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 295 | int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, |
0f113f3e MC |
296 | void *x, const EVP_CIPHER *enc, unsigned char *kstr, |
297 | int klen, pem_password_cb *callback, void *u) | |
298 | { | |
299 | BIO *b; | |
300 | int ret; | |
301 | ||
302 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
303 | PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB); | |
b4df712a | 304 | return 0; |
0f113f3e MC |
305 | } |
306 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
307 | ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); | |
308 | BIO_free(b); | |
b4df712a | 309 | return ret; |
0f113f3e | 310 | } |
d02b48c6 RE |
311 | #endif |
312 | ||
8bb826ee | 313 | int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, |
0f113f3e MC |
314 | void *x, const EVP_CIPHER *enc, unsigned char *kstr, |
315 | int klen, pem_password_cb *callback, void *u) | |
316 | { | |
846ec07d | 317 | EVP_CIPHER_CTX *ctx = NULL; |
4c9b0a03 | 318 | int dsize = 0, i = 0, j = 0, ret = 0; |
0f113f3e MC |
319 | unsigned char *p, *data = NULL; |
320 | const char *objstr = NULL; | |
321 | char buf[PEM_BUFSIZE]; | |
322 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
323 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
324 | ||
325 | if (enc != NULL) { | |
326 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); | |
e40ada04 MC |
327 | if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0 |
328 | || EVP_CIPHER_iv_length(enc) > (int)sizeof(iv) | |
329 | /* | |
330 | * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n" | |
331 | * fits into buf | |
332 | */ | |
333 | || (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13) | |
334 | > sizeof(buf)) { | |
0f113f3e MC |
335 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER); |
336 | goto err; | |
337 | } | |
338 | } | |
339 | ||
340 | if ((dsize = i2d(x, NULL)) < 0) { | |
341 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB); | |
342 | dsize = 0; | |
343 | goto err; | |
344 | } | |
69687aa8 | 345 | /* dsize + 8 bytes are needed */ |
0f113f3e | 346 | /* actually it needs the cipher block size extra... */ |
b196e7d9 | 347 | data = OPENSSL_malloc((unsigned int)dsize + 20); |
0f113f3e MC |
348 | if (data == NULL) { |
349 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE); | |
350 | goto err; | |
351 | } | |
352 | p = data; | |
353 | i = i2d(x, &p); | |
354 | ||
355 | if (enc != NULL) { | |
356 | if (kstr == NULL) { | |
357 | if (callback == NULL) | |
358 | klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); | |
359 | else | |
360 | klen = (*callback) (buf, PEM_BUFSIZE, 1, u); | |
361 | if (klen <= 0) { | |
362 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY); | |
363 | goto err; | |
364 | } | |
a53955d8 | 365 | #ifdef CHARSET_EBCDIC |
0f113f3e MC |
366 | /* Convert the pass phrase from EBCDIC */ |
367 | ebcdic2ascii(buf, buf, klen); | |
a53955d8 | 368 | #endif |
0f113f3e MC |
369 | kstr = (unsigned char *)buf; |
370 | } | |
6c2ff56e | 371 | if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */ |
0f113f3e MC |
372 | goto err; |
373 | /* | |
374 | * The 'iv' is used as the iv and as a salt. It is NOT taken from | |
375 | * the BytesToKey function | |
376 | */ | |
377 | if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) | |
378 | goto err; | |
379 | ||
380 | if (kstr == (unsigned char *)buf) | |
381 | OPENSSL_cleanse(buf, PEM_BUFSIZE); | |
382 | ||
0f113f3e MC |
383 | buf[0] = '\0'; |
384 | PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); | |
6c2ff56e | 385 | PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv); |
0f113f3e MC |
386 | /* k=strlen(buf); */ |
387 | ||
0f113f3e | 388 | ret = 1; |
846ec07d RL |
389 | if ((ctx = EVP_CIPHER_CTX_new()) == NULL |
390 | || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv) | |
391 | || !EVP_EncryptUpdate(ctx, data, &j, data, i) | |
392 | || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i)) | |
0f113f3e | 393 | ret = 0; |
0f113f3e MC |
394 | if (ret == 0) |
395 | goto err; | |
396 | i += j; | |
397 | } else { | |
398 | ret = 1; | |
399 | buf[0] = '\0'; | |
400 | } | |
401 | i = PEM_write_bio(bp, name, buf, data, i); | |
402 | if (i <= 0) | |
403 | ret = 0; | |
404 | err: | |
405 | OPENSSL_cleanse(key, sizeof(key)); | |
406 | OPENSSL_cleanse(iv, sizeof(iv)); | |
846ec07d | 407 | EVP_CIPHER_CTX_free(ctx); |
0f113f3e | 408 | OPENSSL_cleanse(buf, PEM_BUFSIZE); |
4b45c6e5 | 409 | OPENSSL_clear_free(data, (unsigned int)dsize); |
b4df712a | 410 | return ret; |
0f113f3e | 411 | } |
d02b48c6 | 412 | |
6b691a5c | 413 | int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, |
0f113f3e MC |
414 | pem_password_cb *callback, void *u) |
415 | { | |
67787844 VD |
416 | int ok; |
417 | int keylen; | |
418 | long len = *plen; | |
419 | int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */ | |
846ec07d | 420 | EVP_CIPHER_CTX *ctx; |
0f113f3e MC |
421 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
422 | char buf[PEM_BUFSIZE]; | |
423 | ||
67787844 VD |
424 | #if LONG_MAX > INT_MAX |
425 | /* Check that we did not truncate the length */ | |
426 | if (len > INT_MAX) { | |
427 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG); | |
428 | return 0; | |
429 | } | |
430 | #endif | |
0f113f3e MC |
431 | |
432 | if (cipher->cipher == NULL) | |
67787844 | 433 | return 1; |
0f113f3e | 434 | if (callback == NULL) |
67787844 | 435 | keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); |
0f113f3e | 436 | else |
67787844 VD |
437 | keylen = callback(buf, PEM_BUFSIZE, 0, u); |
438 | if (keylen <= 0) { | |
0f113f3e | 439 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ); |
67787844 | 440 | return 0; |
0f113f3e | 441 | } |
a53955d8 | 442 | #ifdef CHARSET_EBCDIC |
0f113f3e | 443 | /* Convert the pass phrase from EBCDIC */ |
67787844 | 444 | ebcdic2ascii(buf, buf, keylen); |
a53955d8 UM |
445 | #endif |
446 | ||
0f113f3e | 447 | if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), |
67787844 | 448 | (unsigned char *)buf, keylen, 1, key, NULL)) |
0f113f3e MC |
449 | return 0; |
450 | ||
846ec07d RL |
451 | ctx = EVP_CIPHER_CTX_new(); |
452 | if (ctx == NULL) | |
453 | return 0; | |
67787844 VD |
454 | |
455 | ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); | |
456 | if (ok) | |
457 | ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen); | |
458 | if (ok) { | |
459 | /* Squirrel away the length of data decrypted so far. */ | |
460 | *plen = ilen; | |
461 | ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen); | |
462 | } | |
463 | if (ok) | |
464 | *plen += ilen; | |
465 | else | |
466 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); | |
467 | ||
846ec07d | 468 | EVP_CIPHER_CTX_free(ctx); |
0f113f3e MC |
469 | OPENSSL_cleanse((char *)buf, sizeof(buf)); |
470 | OPENSSL_cleanse((char *)key, sizeof(key)); | |
67787844 | 471 | return ok; |
0f113f3e | 472 | } |
d02b48c6 | 473 | |
67787844 VD |
474 | /* |
475 | * This implements a very limited PEM header parser that does not support the | |
476 | * full grammar of rfc1421. In particular, folded headers are not supported, | |
477 | * nor is additional whitespace. | |
478 | * | |
479 | * A robust implementation would make use of a library that turns the headers | |
480 | * into a BIO from which one folded line is read at a time, and is then split | |
481 | * into a header label and content. We would then parse the content of the | |
482 | * headers we care about. This is overkill for just this limited use-case, but | |
483 | * presumably we also parse rfc822-style headers for S/MIME, so a common | |
484 | * abstraction might well be more generally useful. | |
485 | */ | |
6b691a5c | 486 | int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
0f113f3e | 487 | { |
67787844 VD |
488 | static const char ProcType[] = "Proc-Type:"; |
489 | static const char ENCRYPTED[] = "ENCRYPTED"; | |
490 | static const char DEKInfo[] = "DEK-Info:"; | |
0f113f3e | 491 | const EVP_CIPHER *enc = NULL; |
67787844 | 492 | int ivlen; |
33a6d5a0 | 493 | char *dekinfostart, c; |
0f113f3e MC |
494 | |
495 | cipher->cipher = NULL; | |
496 | if ((header == NULL) || (*header == '\0') || (*header == '\n')) | |
67787844 VD |
497 | return 1; |
498 | ||
499 | if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) { | |
0f113f3e | 500 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); |
67787844 | 501 | return 0; |
0f113f3e | 502 | } |
67787844 VD |
503 | header += sizeof(ProcType)-1; |
504 | header += strspn(header, " \t"); | |
505 | ||
506 | if (*header++ != '4' || *header++ != ',') | |
507 | return 0; | |
508 | header += strspn(header, " \t"); | |
509 | ||
510 | /* We expect "ENCRYPTED" followed by optional white-space + line break */ | |
511 | if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 || | |
512 | strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) { | |
0f113f3e | 513 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); |
67787844 | 514 | return 0; |
0f113f3e | 515 | } |
67787844 VD |
516 | header += sizeof(ENCRYPTED)-1; |
517 | header += strspn(header, " \t\r"); | |
518 | if (*header++ != '\n') { | |
0f113f3e | 519 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); |
67787844 | 520 | return 0; |
0f113f3e | 521 | } |
67787844 VD |
522 | |
523 | /*- | |
524 | * https://tools.ietf.org/html/rfc1421#section-4.6.1.3 | |
525 | * We expect "DEK-Info: algo[,hex-parameters]" | |
526 | */ | |
527 | if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) { | |
0f113f3e | 528 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); |
67787844 | 529 | return 0; |
0f113f3e | 530 | } |
67787844 VD |
531 | header += sizeof(DEKInfo)-1; |
532 | header += strspn(header, " \t"); | |
0f113f3e | 533 | |
67787844 VD |
534 | /* |
535 | * DEK-INFO is a comma-separated combination of algorithm name and optional | |
536 | * parameters. | |
537 | */ | |
33a6d5a0 | 538 | dekinfostart = header; |
67787844 VD |
539 | header += strcspn(header, " \t,"); |
540 | c = *header; | |
0f113f3e | 541 | *header = '\0'; |
33a6d5a0 | 542 | cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart); |
67787844 VD |
543 | *header = c; |
544 | header += strspn(header, " \t"); | |
0f113f3e MC |
545 | |
546 | if (enc == NULL) { | |
547 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); | |
67787844 | 548 | return 0; |
0f113f3e | 549 | } |
67787844 VD |
550 | ivlen = EVP_CIPHER_iv_length(enc); |
551 | if (ivlen > 0 && *header++ != ',') { | |
552 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV); | |
553 | return 0; | |
554 | } else if (ivlen == 0 && *header == ',') { | |
555 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV); | |
556 | return 0; | |
557 | } | |
558 | ||
985c3146 | 559 | if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc))) |
67787844 | 560 | return 0; |
0f113f3e | 561 | |
67787844 | 562 | return 1; |
0f113f3e | 563 | } |
d02b48c6 | 564 | |
8c3c5701 | 565 | static int load_iv(char **fromp, unsigned char *to, int num) |
0f113f3e MC |
566 | { |
567 | int v, i; | |
568 | char *from; | |
569 | ||
570 | from = *fromp; | |
571 | for (i = 0; i < num; i++) | |
572 | to[i] = 0; | |
573 | num *= 2; | |
574 | for (i = 0; i < num; i++) { | |
49445f21 RS |
575 | v = OPENSSL_hexchar2int(*from); |
576 | if (v < 0) { | |
0f113f3e | 577 | PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS); |
b4df712a | 578 | return 0; |
0f113f3e MC |
579 | } |
580 | from++; | |
581 | to[i / 2] |= v << (long)((!(i & 1)) * 4); | |
582 | } | |
583 | ||
584 | *fromp = from; | |
b4df712a | 585 | return 1; |
0f113f3e | 586 | } |
d02b48c6 | 587 | |
4b618848 | 588 | #ifndef OPENSSL_NO_STDIO |
edf92f1c | 589 | int PEM_write(FILE *fp, const char *name, const char *header, |
0f113f3e MC |
590 | const unsigned char *data, long len) |
591 | { | |
592 | BIO *b; | |
593 | int ret; | |
594 | ||
595 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
596 | PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB); | |
b4df712a | 597 | return 0; |
0f113f3e MC |
598 | } |
599 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
600 | ret = PEM_write_bio(b, name, header, data, len); | |
601 | BIO_free(b); | |
b4df712a | 602 | return ret; |
0f113f3e | 603 | } |
d02b48c6 RE |
604 | #endif |
605 | ||
edf92f1c | 606 | int PEM_write_bio(BIO *bp, const char *name, const char *header, |
0f113f3e MC |
607 | const unsigned char *data, long len) |
608 | { | |
609 | int nlen, n, i, j, outl; | |
610 | unsigned char *buf = NULL; | |
601ab315 | 611 | EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); |
0f113f3e MC |
612 | int reason = ERR_R_BUF_LIB; |
613 | ||
601ab315 RL |
614 | if (ctx == NULL) { |
615 | reason = ERR_R_MALLOC_FAILURE; | |
616 | goto err; | |
617 | } | |
618 | ||
619 | EVP_EncodeInit(ctx); | |
0f113f3e MC |
620 | nlen = strlen(name); |
621 | ||
622 | if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || | |
623 | (BIO_write(bp, name, nlen) != nlen) || | |
624 | (BIO_write(bp, "-----\n", 6) != 6)) | |
625 | goto err; | |
626 | ||
627 | i = strlen(header); | |
628 | if (i > 0) { | |
629 | if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) | |
630 | goto err; | |
631 | } | |
632 | ||
633 | buf = OPENSSL_malloc(PEM_BUFSIZE * 8); | |
634 | if (buf == NULL) { | |
635 | reason = ERR_R_MALLOC_FAILURE; | |
636 | goto err; | |
637 | } | |
638 | ||
639 | i = j = 0; | |
640 | while (len > 0) { | |
641 | n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); | |
cf3404fc MC |
642 | if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n)) |
643 | goto err; | |
0f113f3e MC |
644 | if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) |
645 | goto err; | |
646 | i += outl; | |
647 | len -= n; | |
648 | j += n; | |
649 | } | |
601ab315 | 650 | EVP_EncodeFinal(ctx, buf, &outl); |
0f113f3e MC |
651 | if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) |
652 | goto err; | |
0f113f3e MC |
653 | if ((BIO_write(bp, "-----END ", 9) != 9) || |
654 | (BIO_write(bp, name, nlen) != nlen) || | |
655 | (BIO_write(bp, "-----\n", 6) != 6)) | |
656 | goto err; | |
601ab315 RL |
657 | OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
658 | EVP_ENCODE_CTX_free(ctx); | |
b4df712a | 659 | return i + outl; |
0f113f3e | 660 | err: |
4b45c6e5 | 661 | OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
601ab315 | 662 | EVP_ENCODE_CTX_free(ctx); |
0f113f3e | 663 | PEMerr(PEM_F_PEM_WRITE_BIO, reason); |
b4df712a | 664 | return 0; |
0f113f3e | 665 | } |
d02b48c6 | 666 | |
4b618848 | 667 | #ifndef OPENSSL_NO_STDIO |
6b691a5c | 668 | int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, |
0f113f3e MC |
669 | long *len) |
670 | { | |
671 | BIO *b; | |
672 | int ret; | |
673 | ||
674 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
675 | PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB); | |
b4df712a | 676 | return 0; |
0f113f3e MC |
677 | } |
678 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
679 | ret = PEM_read_bio(b, name, header, data, len); | |
680 | BIO_free(b); | |
b4df712a | 681 | return ret; |
0f113f3e | 682 | } |
d02b48c6 RE |
683 | #endif |
684 | ||
204afd81 | 685 | /* Some helpers for PEM_read_bio_ex(). */ |
204afd81 | 686 | static int sanitize_line(char *linebuf, int len, unsigned int flags) |
0f113f3e | 687 | { |
204afd81 | 688 | int i; |
0f113f3e | 689 | |
204afd81 BK |
690 | if (flags & PEM_FLAG_EAY_COMPATIBLE) { |
691 | /* Strip trailing whitespace */ | |
692 | while ((len >= 0) && (linebuf[len] <= ' ')) | |
693 | len--; | |
694 | /* Go back to whitespace before applying uniform line ending. */ | |
695 | len++; | |
696 | } else if (flags & PEM_FLAG_ONLY_B64) { | |
697 | for (i = 0; i < len; ++i) { | |
a1df06b3 P |
698 | if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n' |
699 | || linebuf[i] == '\r') | |
204afd81 BK |
700 | break; |
701 | } | |
702 | len = i; | |
703 | } else { | |
704 | /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip | |
705 | * control characters in-place and let everything through. */ | |
706 | for (i = 0; i < len; ++i) { | |
707 | if (linebuf[i] == '\n' || linebuf[i] == '\r') | |
708 | break; | |
a1df06b3 | 709 | if (ossl_iscntrl(linebuf[i])) |
204afd81 BK |
710 | linebuf[i] = ' '; |
711 | } | |
712 | len = i; | |
601ab315 | 713 | } |
204afd81 BK |
714 | /* The caller allocated LINESIZE+1, so this is safe. */ |
715 | linebuf[len++] = '\n'; | |
716 | linebuf[len] = '\0'; | |
717 | return len; | |
718 | } | |
601ab315 | 719 | |
204afd81 BK |
720 | #define LINESIZE 255 |
721 | /* Note trailing spaces for begin and end. */ | |
722 | static const char beginstr[] = "-----BEGIN "; | |
723 | static const char endstr[] = "-----END "; | |
724 | static const char tailstr[] = "-----\n"; | |
725 | #define BEGINLEN (sizeof(beginstr) - 1) | |
726 | #define ENDLEN (sizeof(endstr) - 1) | |
727 | #define TAILLEN (sizeof(tailstr) - 1) | |
728 | static int get_name(BIO *bp, char **name, unsigned int flags) | |
729 | { | |
730 | char *linebuf; | |
731 | int ret = 0; | |
732 | size_t len; | |
733 | ||
734 | /* | |
735 | * Need to hold trailing NUL (accounted for by BIO_gets() and the newline | |
736 | * that will be added by sanitize_line() (the extra '1'). | |
737 | */ | |
738 | linebuf = pem_malloc(LINESIZE + 1, flags); | |
739 | if (linebuf == NULL) { | |
740 | PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE); | |
741 | return 0; | |
0f113f3e MC |
742 | } |
743 | ||
204afd81 BK |
744 | do { |
745 | len = BIO_gets(bp, linebuf, LINESIZE); | |
0f113f3e | 746 | |
204afd81 BK |
747 | if (len <= 0) { |
748 | PEMerr(PEM_F_GET_NAME, PEM_R_NO_START_LINE); | |
0f113f3e MC |
749 | goto err; |
750 | } | |
751 | ||
204afd81 BK |
752 | /* Strip trailing garbage and standardize ending. */ |
753 | len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64); | |
754 | ||
755 | /* Allow leading empty or non-matching lines. */ | |
756 | } while (strncmp(linebuf, beginstr, BEGINLEN) != 0 | |
757 | || len < TAILLEN | |
758 | || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0); | |
759 | linebuf[len - TAILLEN] = '\0'; | |
760 | len = len - BEGINLEN - TAILLEN + 1; | |
761 | *name = pem_malloc(len, flags); | |
762 | if (*name == NULL) { | |
763 | PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE); | |
764 | goto err; | |
765 | } | |
766 | memcpy(*name, linebuf + BEGINLEN, len); | |
767 | ret = 1; | |
768 | ||
769 | err: | |
2ca8bbe5 | 770 | pem_free(linebuf, flags, LINESIZE + 1); |
204afd81 BK |
771 | return ret; |
772 | } | |
773 | ||
774 | /* Keep track of how much of a header we've seen. */ | |
775 | enum header_status { | |
776 | MAYBE_HEADER, | |
777 | IN_HEADER, | |
778 | POST_HEADER | |
779 | }; | |
780 | ||
781 | /** | |
782 | * Extract the optional PEM header, with details on the type of content and | |
783 | * any encryption used on the contents, and the bulk of the data from the bio. | |
784 | * The end of the header is marked by a blank line; if the end-of-input marker | |
785 | * is reached prior to a blank line, there is no header. | |
786 | * | |
787 | * The header and data arguments are BIO** since we may have to swap them | |
788 | * if there is no header, for efficiency. | |
789 | * | |
790 | * We need the name of the PEM-encoded type to verify the end string. | |
791 | */ | |
792 | static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name, | |
793 | unsigned int flags) | |
794 | { | |
795 | BIO *tmp = *header; | |
796 | char *linebuf, *p; | |
797 | int len, line, ret = 0, end = 0; | |
798 | /* 0 if not seen (yet), 1 if reading header, 2 if finished header */ | |
799 | enum header_status got_header = MAYBE_HEADER; | |
800 | unsigned int flags_mask; | |
801 | size_t namelen; | |
802 | ||
803 | /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline | |
804 | * that will be added by sanitize_line() (the extra '1'). */ | |
805 | linebuf = pem_malloc(LINESIZE + 1, flags); | |
806 | if (linebuf == NULL) { | |
807 | PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE); | |
808 | return 0; | |
809 | } | |
0f113f3e | 810 | |
204afd81 BK |
811 | for (line = 0; ; line++) { |
812 | flags_mask = ~0u; | |
813 | len = BIO_gets(bp, linebuf, LINESIZE); | |
814 | if (len <= 0) { | |
815 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_SHORT_HEADER); | |
816 | goto err; | |
817 | } | |
0f113f3e | 818 | |
204afd81 BK |
819 | if (got_header == MAYBE_HEADER) { |
820 | if (memchr(linebuf, ':', len) != NULL) | |
821 | got_header = IN_HEADER; | |
822 | } | |
823 | if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER) | |
824 | flags_mask &= ~PEM_FLAG_ONLY_B64; | |
825 | len = sanitize_line(linebuf, len, flags & flags_mask); | |
826 | ||
827 | /* Check for end of header. */ | |
828 | if (linebuf[0] == '\n') { | |
829 | if (got_header == POST_HEADER) { | |
830 | /* Another blank line is an error. */ | |
831 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE); | |
0f113f3e MC |
832 | goto err; |
833 | } | |
204afd81 BK |
834 | got_header = POST_HEADER; |
835 | tmp = *data; | |
836 | continue; | |
0f113f3e | 837 | } |
0f113f3e | 838 | |
204afd81 BK |
839 | /* Check for end of stream (which means there is no header). */ |
840 | if (strncmp(linebuf, endstr, ENDLEN) == 0) { | |
841 | p = linebuf + ENDLEN; | |
842 | namelen = strlen(name); | |
843 | if (strncmp(p, name, namelen) != 0 || | |
844 | strncmp(p + namelen, tailstr, TAILLEN) != 0) { | |
845 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE); | |
846 | goto err; | |
847 | } | |
848 | if (got_header == MAYBE_HEADER) { | |
849 | *header = *data; | |
850 | *data = tmp; | |
851 | } | |
0f113f3e | 852 | break; |
204afd81 BK |
853 | } else if (end) { |
854 | /* Malformed input; short line not at end of data. */ | |
855 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE); | |
0f113f3e MC |
856 | goto err; |
857 | } | |
204afd81 BK |
858 | /* |
859 | * Else, a line of text -- could be header or data; we don't | |
860 | * know yet. Just pass it through. | |
861 | */ | |
aa8dfbc4 BE |
862 | if (BIO_puts(tmp, linebuf) < 0) |
863 | goto err; | |
204afd81 BK |
864 | /* |
865 | * Only encrypted files need the line length check applied. | |
866 | */ | |
867 | if (got_header == POST_HEADER) { | |
868 | /* 65 includes the trailing newline */ | |
869 | if (len > 65) | |
870 | goto err; | |
871 | if (len < 65) | |
872 | end = 1; | |
0f113f3e | 873 | } |
0f113f3e | 874 | } |
0f113f3e | 875 | |
204afd81 BK |
876 | ret = 1; |
877 | err: | |
2ca8bbe5 | 878 | pem_free(linebuf, flags, LINESIZE + 1); |
204afd81 BK |
879 | return ret; |
880 | } | |
0f113f3e | 881 | |
204afd81 BK |
882 | /** |
883 | * Read in PEM-formatted data from the given BIO. | |
884 | * | |
885 | * By nature of the PEM format, all content must be printable ASCII (except | |
886 | * for line endings). Other characters, or lines that are longer than 80 | |
887 | * characters, are malformed input and will be rejected. | |
888 | */ | |
889 | int PEM_read_bio_ex(BIO *bp, char **name_out, char **header, | |
890 | unsigned char **data, long *len_out, unsigned int flags) | |
891 | { | |
892 | EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); | |
893 | const BIO_METHOD *bmeth; | |
894 | BIO *headerB = NULL, *dataB = NULL; | |
895 | char *name = NULL; | |
896 | int len, taillen, headerlen, ret = 0; | |
897 | BUF_MEM * buf_mem; | |
0f113f3e | 898 | |
204afd81 BK |
899 | if (ctx == NULL) { |
900 | PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE); | |
901 | return 0; | |
0f113f3e MC |
902 | } |
903 | ||
204afd81 BK |
904 | *len_out = 0; |
905 | *name_out = *header = NULL; | |
906 | *data = NULL; | |
907 | if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) { | |
908 | /* These two are mutually incompatible; bail out. */ | |
909 | PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT); | |
910 | goto end; | |
0f113f3e | 911 | } |
204afd81 BK |
912 | bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem(); |
913 | ||
914 | headerB = BIO_new(bmeth); | |
915 | dataB = BIO_new(bmeth); | |
916 | if (headerB == NULL || dataB == NULL) { | |
917 | PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE); | |
918 | goto end; | |
0f113f3e | 919 | } |
0f113f3e | 920 | |
204afd81 BK |
921 | if (!get_name(bp, &name, flags)) |
922 | goto end; | |
923 | if (!get_header_and_data(bp, &headerB, &dataB, name, flags)) | |
924 | goto end; | |
925 | ||
926 | EVP_DecodeInit(ctx); | |
927 | BIO_get_mem_ptr(dataB, &buf_mem); | |
928 | len = buf_mem->length; | |
929 | if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len, | |
930 | (unsigned char*)buf_mem->data, len) < 0 | |
931 | || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]), | |
932 | &taillen) < 0) { | |
933 | PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE); | |
934 | goto end; | |
935 | } | |
936 | len += taillen; | |
937 | buf_mem->length = len; | |
938 | ||
939 | /* There was no data in the PEM file; avoid malloc(0). */ | |
940 | if (len == 0) | |
941 | goto end; | |
942 | headerlen = BIO_get_mem_data(headerB, NULL); | |
943 | *header = pem_malloc(headerlen + 1, flags); | |
944 | *data = pem_malloc(len, flags); | |
945 | if (*header == NULL || *data == NULL) { | |
2ca8bbe5 BE |
946 | pem_free(*header, flags, 0); |
947 | pem_free(*data, flags, 0); | |
204afd81 BK |
948 | goto end; |
949 | } | |
950 | BIO_read(headerB, *header, headerlen); | |
951 | (*header)[headerlen] = '\0'; | |
952 | BIO_read(dataB, *data, len); | |
953 | *len_out = len; | |
954 | *name_out = name; | |
955 | name = NULL; | |
956 | ret = 1; | |
957 | ||
958 | end: | |
601ab315 | 959 | EVP_ENCODE_CTX_free(ctx); |
2ca8bbe5 | 960 | pem_free(name, flags, 0); |
204afd81 BK |
961 | BIO_free(headerB); |
962 | BIO_free(dataB); | |
963 | return ret; | |
964 | } | |
965 | ||
966 | int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, | |
967 | long *len) | |
968 | { | |
969 | return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE); | |
0f113f3e MC |
970 | } |
971 | ||
972 | /* | |
973 | * Check pem string and return prefix length. If for example the pem_str == | |
974 | * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the | |
975 | * string "RSA". | |
d82e2718 DSH |
976 | */ |
977 | ||
e4263314 | 978 | int pem_check_suffix(const char *pem_str, const char *suffix) |
0f113f3e MC |
979 | { |
980 | int pem_len = strlen(pem_str); | |
981 | int suffix_len = strlen(suffix); | |
982 | const char *p; | |
983 | if (suffix_len + 1 >= pem_len) | |
984 | return 0; | |
985 | p = pem_str + pem_len - suffix_len; | |
986 | if (strcmp(p, suffix)) | |
987 | return 0; | |
988 | p--; | |
989 | if (*p != ' ') | |
990 | return 0; | |
991 | return p - pem_str; | |
992 | } |