]>
Commit | Line | Data |
---|---|---|
62867571 | 1 | /* |
454afd98 | 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
16742672 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
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> | |
25f2138b | 11 | #include "crypto/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> |
25f2138b | 21 | #include "crypto/asn1.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 | 30 | |
d6d94d33 | 31 | int PEM_def_callback(char *buf, int num, int rwflag, void *userdata) |
0f113f3e | 32 | { |
4977b4e9 | 33 | int i, min_len; |
0f113f3e | 34 | const char *prompt; |
af9895cb | 35 | |
d6d94d33 RL |
36 | /* We assume that the user passes a default password as userdata */ |
37 | if (userdata) { | |
38 | i = strlen(userdata); | |
0f113f3e | 39 | i = (i > num) ? num : i; |
d6d94d33 | 40 | memcpy(buf, userdata, i); |
af9895cb | 41 | return i; |
0f113f3e MC |
42 | } |
43 | ||
44 | prompt = EVP_get_pw_prompt(); | |
45 | if (prompt == NULL) | |
46 | prompt = "Enter PEM pass phrase:"; | |
47 | ||
4977b4e9 | 48 | /* |
d6d94d33 RL |
49 | * rwflag == 0 means decryption |
50 | * rwflag == 1 means encryption | |
51 | * | |
52 | * We assume that for encryption, we want a minimum length, while for | |
53 | * decryption, we cannot know any minimum length, so we assume zero. | |
4977b4e9 | 54 | */ |
d6d94d33 | 55 | min_len = rwflag ? MIN_LENGTH : 0; |
b160f282 | 56 | |
d6d94d33 | 57 | i = EVP_read_pw_string_min(buf, min_len, num, prompt, rwflag); |
4977b4e9 RL |
58 | if (i != 0) { |
59 | PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD); | |
60 | memset(buf, 0, (unsigned int)num); | |
61 | return -1; | |
0f113f3e | 62 | } |
4977b4e9 | 63 | return strlen(buf); |
0f113f3e | 64 | } |
d02b48c6 | 65 | |
6b691a5c | 66 | void PEM_proc_type(char *buf, int type) |
0f113f3e MC |
67 | { |
68 | const char *str; | |
86ba26c8 | 69 | char *p = buf + strlen(buf); |
0f113f3e MC |
70 | |
71 | if (type == PEM_TYPE_ENCRYPTED) | |
72 | str = "ENCRYPTED"; | |
73 | else if (type == PEM_TYPE_MIC_CLEAR) | |
74 | str = "MIC-CLEAR"; | |
75 | else if (type == PEM_TYPE_MIC_ONLY) | |
76 | str = "MIC-ONLY"; | |
77 | else | |
78 | str = "BAD-TYPE"; | |
79 | ||
86ba26c8 | 80 | BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str); |
0f113f3e | 81 | } |
d02b48c6 | 82 | |
de0799b0 | 83 | void PEM_dek_info(char *buf, const char *type, int len, const char *str) |
0f113f3e | 84 | { |
0f113f3e | 85 | long i; |
86ba26c8 P |
86 | char *p = buf + strlen(buf); |
87 | int j = PEM_BUFSIZE - (size_t)(p - buf), n; | |
88 | ||
89 | n = BIO_snprintf(p, j, "DEK-Info: %s,", type); | |
90 | if (n > 0) { | |
91 | j -= n; | |
92 | p += n; | |
93 | for (i = 0; i < len; i++) { | |
94 | n = BIO_snprintf(p, j, "%02X", 0xff & str[i]); | |
95 | if (n <= 0) | |
96 | return; | |
97 | j -= n; | |
98 | p += n; | |
99 | } | |
100 | if (j > 1) | |
101 | strcpy(p, "\n"); | |
0f113f3e | 102 | } |
0f113f3e | 103 | } |
d02b48c6 | 104 | |
4b618848 | 105 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 106 | void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, |
0f113f3e MC |
107 | pem_password_cb *cb, void *u) |
108 | { | |
109 | BIO *b; | |
110 | void *ret; | |
111 | ||
112 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
113 | PEMerr(PEM_F_PEM_ASN1_READ, ERR_R_BUF_LIB); | |
b4df712a | 114 | return 0; |
0f113f3e MC |
115 | } |
116 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
117 | ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); | |
118 | BIO_free(b); | |
b4df712a | 119 | return ret; |
0f113f3e | 120 | } |
d02b48c6 RE |
121 | #endif |
122 | ||
ce1b4fe1 DSH |
123 | static int check_pem(const char *nm, const char *name) |
124 | { | |
0f113f3e | 125 | /* Normal matching nm and name */ |
86885c28 | 126 | if (strcmp(nm, name) == 0) |
0f113f3e MC |
127 | return 1; |
128 | ||
129 | /* Make PEM_STRING_EVP_PKEY match any private key */ | |
130 | ||
86885c28 | 131 | if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) { |
0f113f3e MC |
132 | int slen; |
133 | const EVP_PKEY_ASN1_METHOD *ameth; | |
86885c28 | 134 | if (strcmp(nm, PEM_STRING_PKCS8) == 0) |
0f113f3e | 135 | return 1; |
86885c28 | 136 | if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) |
0f113f3e MC |
137 | return 1; |
138 | slen = pem_check_suffix(nm, "PRIVATE KEY"); | |
139 | if (slen > 0) { | |
140 | /* | |
60250017 | 141 | * NB: ENGINE implementations won't contain a deprecated old |
0f113f3e MC |
142 | * private key decode function so don't look for them. |
143 | */ | |
144 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); | |
145 | if (ameth && ameth->old_priv_decode) | |
146 | return 1; | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
86885c28 | 151 | if (strcmp(name, PEM_STRING_PARAMETERS) == 0) { |
0f113f3e MC |
152 | int slen; |
153 | const EVP_PKEY_ASN1_METHOD *ameth; | |
154 | slen = pem_check_suffix(nm, "PARAMETERS"); | |
155 | if (slen > 0) { | |
156 | ENGINE *e; | |
157 | ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); | |
158 | if (ameth) { | |
159 | int r; | |
160 | if (ameth->param_decode) | |
161 | r = 1; | |
162 | else | |
163 | r = 0; | |
01b8b3c7 | 164 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 165 | ENGINE_finish(e); |
01b8b3c7 | 166 | #endif |
0f113f3e MC |
167 | return r; |
168 | } | |
169 | } | |
170 | return 0; | |
171 | } | |
172 | /* If reading DH parameters handle X9.42 DH format too */ | |
86885c28 RS |
173 | if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0 |
174 | && strcmp(name, PEM_STRING_DHPARAMS) == 0) | |
0f113f3e | 175 | return 1; |
3e4585c8 | 176 | |
0f113f3e | 177 | /* Permit older strings */ |
ce1b4fe1 | 178 | |
86885c28 RS |
179 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
180 | && strcmp(name, PEM_STRING_X509) == 0) | |
0f113f3e | 181 | return 1; |
ce1b4fe1 | 182 | |
86885c28 RS |
183 | if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0 |
184 | && strcmp(name, PEM_STRING_X509_REQ) == 0) | |
0f113f3e | 185 | return 1; |
ce1b4fe1 | 186 | |
0f113f3e | 187 | /* Allow normal certs to be read as trusted certs */ |
86885c28 RS |
188 | if (strcmp(nm, PEM_STRING_X509) == 0 |
189 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 190 | return 1; |
ce1b4fe1 | 191 | |
86885c28 RS |
192 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
193 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 194 | return 1; |
ce1b4fe1 | 195 | |
0f113f3e | 196 | /* Some CAs use PKCS#7 with CERTIFICATE headers */ |
86885c28 RS |
197 | if (strcmp(nm, PEM_STRING_X509) == 0 |
198 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 199 | return 1; |
3142c86d | 200 | |
86885c28 RS |
201 | if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0 |
202 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 203 | return 1; |
2401debe | 204 | |
8931b30d | 205 | #ifndef OPENSSL_NO_CMS |
86885c28 RS |
206 | if (strcmp(nm, PEM_STRING_X509) == 0 |
207 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e MC |
208 | return 1; |
209 | /* Allow CMS to be read from PKCS#7 headers */ | |
86885c28 RS |
210 | if (strcmp(nm, PEM_STRING_PKCS7) == 0 |
211 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e | 212 | return 1; |
8931b30d DSH |
213 | #endif |
214 | ||
0f113f3e | 215 | return 0; |
ce1b4fe1 DSH |
216 | } |
217 | ||
2ca8bbe5 | 218 | static void pem_free(void *p, unsigned int flags, size_t num) |
204afd81 BK |
219 | { |
220 | if (flags & PEM_FLAG_SECURE) | |
2ca8bbe5 | 221 | OPENSSL_secure_clear_free(p, num); |
204afd81 BK |
222 | else |
223 | OPENSSL_free(p); | |
224 | } | |
225 | ||
226 | static void *pem_malloc(int num, unsigned int flags) | |
227 | { | |
228 | return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num) | |
229 | : OPENSSL_malloc(num); | |
230 | } | |
231 | ||
7671342e BK |
232 | static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen, |
233 | char **pnm, const char *name, BIO *bp, | |
234 | pem_password_cb *cb, void *u, | |
235 | unsigned int flags) | |
0f113f3e MC |
236 | { |
237 | EVP_CIPHER_INFO cipher; | |
238 | char *nm = NULL, *header = NULL; | |
239 | unsigned char *data = NULL; | |
2ca8bbe5 | 240 | long len = 0; |
0f113f3e MC |
241 | int ret = 0; |
242 | ||
7671342e | 243 | do { |
2ca8bbe5 BE |
244 | pem_free(nm, flags, 0); |
245 | pem_free(header, flags, 0); | |
246 | pem_free(data, flags, len); | |
7671342e | 247 | if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) { |
0f113f3e MC |
248 | if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) |
249 | ERR_add_error_data(2, "Expecting: ", name); | |
250 | return 0; | |
251 | } | |
7671342e | 252 | } while (!check_pem(nm, name)); |
0f113f3e MC |
253 | if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) |
254 | goto err; | |
255 | if (!PEM_do_header(&cipher, data, &len, cb, u)) | |
256 | goto err; | |
257 | ||
258 | *pdata = data; | |
259 | *plen = len; | |
260 | ||
7671342e | 261 | if (pnm != NULL) |
0f113f3e MC |
262 | *pnm = nm; |
263 | ||
264 | ret = 1; | |
265 | ||
266 | err: | |
7671342e | 267 | if (!ret || pnm == NULL) |
2ca8bbe5 BE |
268 | pem_free(nm, flags, 0); |
269 | pem_free(header, flags, 0); | |
0f113f3e | 270 | if (!ret) |
2ca8bbe5 | 271 | pem_free(data, flags, len); |
0f113f3e MC |
272 | return ret; |
273 | } | |
d02b48c6 | 274 | |
7671342e BK |
275 | int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, |
276 | const char *name, BIO *bp, pem_password_cb *cb, | |
277 | void *u) { | |
278 | return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, | |
279 | PEM_FLAG_EAY_COMPATIBLE); | |
280 | } | |
281 | ||
282 | int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm, | |
283 | const char *name, BIO *bp, pem_password_cb *cb, | |
284 | void *u) { | |
285 | return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, | |
286 | PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE); | |
287 | } | |
288 | ||
4b618848 | 289 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 290 | int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, |
de0799b0 RL |
291 | const void *x, const EVP_CIPHER *enc, |
292 | const unsigned char *kstr, int klen, | |
293 | pem_password_cb *callback, void *u) | |
0f113f3e MC |
294 | { |
295 | BIO *b; | |
296 | int ret; | |
297 | ||
298 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
299 | PEMerr(PEM_F_PEM_ASN1_WRITE, ERR_R_BUF_LIB); | |
b4df712a | 300 | return 0; |
0f113f3e MC |
301 | } |
302 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
303 | ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); | |
304 | BIO_free(b); | |
b4df712a | 305 | return ret; |
0f113f3e | 306 | } |
d02b48c6 RE |
307 | #endif |
308 | ||
8bb826ee | 309 | int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, |
de0799b0 RL |
310 | const void *x, const EVP_CIPHER *enc, |
311 | const unsigned char *kstr, int klen, | |
312 | pem_password_cb *callback, void *u) | |
0f113f3e | 313 | { |
846ec07d | 314 | EVP_CIPHER_CTX *ctx = NULL; |
4c9b0a03 | 315 | int dsize = 0, i = 0, j = 0, ret = 0; |
0f113f3e MC |
316 | unsigned char *p, *data = NULL; |
317 | const char *objstr = NULL; | |
318 | char buf[PEM_BUFSIZE]; | |
319 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
320 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
321 | ||
322 | if (enc != NULL) { | |
323 | objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc)); | |
e40ada04 MC |
324 | if (objstr == NULL || EVP_CIPHER_iv_length(enc) == 0 |
325 | || EVP_CIPHER_iv_length(enc) > (int)sizeof(iv) | |
326 | /* | |
327 | * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n" | |
328 | * fits into buf | |
329 | */ | |
330 | || (strlen(objstr) + 23 + 2 * EVP_CIPHER_iv_length(enc) + 13) | |
331 | > sizeof(buf)) { | |
0f113f3e MC |
332 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_UNSUPPORTED_CIPHER); |
333 | goto err; | |
334 | } | |
335 | } | |
336 | ||
337 | if ((dsize = i2d(x, NULL)) < 0) { | |
338 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_ASN1_LIB); | |
339 | dsize = 0; | |
340 | goto err; | |
341 | } | |
69687aa8 | 342 | /* dsize + 8 bytes are needed */ |
0f113f3e | 343 | /* actually it needs the cipher block size extra... */ |
b196e7d9 | 344 | data = OPENSSL_malloc((unsigned int)dsize + 20); |
0f113f3e MC |
345 | if (data == NULL) { |
346 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, ERR_R_MALLOC_FAILURE); | |
347 | goto err; | |
348 | } | |
349 | p = data; | |
350 | i = i2d(x, &p); | |
351 | ||
352 | if (enc != NULL) { | |
353 | if (kstr == NULL) { | |
354 | if (callback == NULL) | |
355 | klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u); | |
356 | else | |
357 | klen = (*callback) (buf, PEM_BUFSIZE, 1, u); | |
358 | if (klen <= 0) { | |
359 | PEMerr(PEM_F_PEM_ASN1_WRITE_BIO, PEM_R_READ_KEY); | |
360 | goto err; | |
361 | } | |
a53955d8 | 362 | #ifdef CHARSET_EBCDIC |
0f113f3e MC |
363 | /* Convert the pass phrase from EBCDIC */ |
364 | ebcdic2ascii(buf, buf, klen); | |
a53955d8 | 365 | #endif |
0f113f3e MC |
366 | kstr = (unsigned char *)buf; |
367 | } | |
6c2ff56e | 368 | if (RAND_bytes(iv, EVP_CIPHER_iv_length(enc)) <= 0) /* Generate a salt */ |
0f113f3e MC |
369 | goto err; |
370 | /* | |
371 | * The 'iv' is used as the iv and as a salt. It is NOT taken from | |
372 | * the BytesToKey function | |
373 | */ | |
374 | if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) | |
375 | goto err; | |
376 | ||
377 | if (kstr == (unsigned char *)buf) | |
378 | OPENSSL_cleanse(buf, PEM_BUFSIZE); | |
379 | ||
0f113f3e MC |
380 | buf[0] = '\0'; |
381 | PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); | |
6c2ff56e | 382 | PEM_dek_info(buf, objstr, EVP_CIPHER_iv_length(enc), (char *)iv); |
0f113f3e MC |
383 | /* k=strlen(buf); */ |
384 | ||
0f113f3e | 385 | ret = 1; |
846ec07d RL |
386 | if ((ctx = EVP_CIPHER_CTX_new()) == NULL |
387 | || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv) | |
388 | || !EVP_EncryptUpdate(ctx, data, &j, data, i) | |
389 | || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i)) | |
0f113f3e | 390 | ret = 0; |
0f113f3e MC |
391 | if (ret == 0) |
392 | goto err; | |
393 | i += j; | |
394 | } else { | |
395 | ret = 1; | |
396 | buf[0] = '\0'; | |
397 | } | |
398 | i = PEM_write_bio(bp, name, buf, data, i); | |
399 | if (i <= 0) | |
400 | ret = 0; | |
401 | err: | |
402 | OPENSSL_cleanse(key, sizeof(key)); | |
403 | OPENSSL_cleanse(iv, sizeof(iv)); | |
846ec07d | 404 | EVP_CIPHER_CTX_free(ctx); |
0f113f3e | 405 | OPENSSL_cleanse(buf, PEM_BUFSIZE); |
4b45c6e5 | 406 | OPENSSL_clear_free(data, (unsigned int)dsize); |
b4df712a | 407 | return ret; |
0f113f3e | 408 | } |
d02b48c6 | 409 | |
6b691a5c | 410 | int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, |
0f113f3e MC |
411 | pem_password_cb *callback, void *u) |
412 | { | |
67787844 VD |
413 | int ok; |
414 | int keylen; | |
415 | long len = *plen; | |
416 | int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */ | |
846ec07d | 417 | EVP_CIPHER_CTX *ctx; |
0f113f3e MC |
418 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
419 | char buf[PEM_BUFSIZE]; | |
420 | ||
67787844 VD |
421 | #if LONG_MAX > INT_MAX |
422 | /* Check that we did not truncate the length */ | |
423 | if (len > INT_MAX) { | |
424 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_HEADER_TOO_LONG); | |
425 | return 0; | |
426 | } | |
427 | #endif | |
0f113f3e MC |
428 | |
429 | if (cipher->cipher == NULL) | |
67787844 | 430 | return 1; |
0f113f3e | 431 | if (callback == NULL) |
67787844 | 432 | keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); |
0f113f3e | 433 | else |
67787844 | 434 | keylen = callback(buf, PEM_BUFSIZE, 0, u); |
c82c3462 | 435 | if (keylen < 0) { |
0f113f3e | 436 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_PASSWORD_READ); |
67787844 | 437 | return 0; |
0f113f3e | 438 | } |
a53955d8 | 439 | #ifdef CHARSET_EBCDIC |
0f113f3e | 440 | /* Convert the pass phrase from EBCDIC */ |
67787844 | 441 | ebcdic2ascii(buf, buf, keylen); |
a53955d8 UM |
442 | #endif |
443 | ||
0f113f3e | 444 | if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), |
67787844 | 445 | (unsigned char *)buf, keylen, 1, key, NULL)) |
0f113f3e MC |
446 | return 0; |
447 | ||
846ec07d RL |
448 | ctx = EVP_CIPHER_CTX_new(); |
449 | if (ctx == NULL) | |
450 | return 0; | |
67787844 VD |
451 | |
452 | ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); | |
453 | if (ok) | |
454 | ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen); | |
455 | if (ok) { | |
456 | /* Squirrel away the length of data decrypted so far. */ | |
457 | *plen = ilen; | |
458 | ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen); | |
459 | } | |
460 | if (ok) | |
461 | *plen += ilen; | |
462 | else | |
463 | PEMerr(PEM_F_PEM_DO_HEADER, PEM_R_BAD_DECRYPT); | |
464 | ||
846ec07d | 465 | EVP_CIPHER_CTX_free(ctx); |
0f113f3e MC |
466 | OPENSSL_cleanse((char *)buf, sizeof(buf)); |
467 | OPENSSL_cleanse((char *)key, sizeof(key)); | |
67787844 | 468 | return ok; |
0f113f3e | 469 | } |
d02b48c6 | 470 | |
67787844 VD |
471 | /* |
472 | * This implements a very limited PEM header parser that does not support the | |
473 | * full grammar of rfc1421. In particular, folded headers are not supported, | |
474 | * nor is additional whitespace. | |
475 | * | |
476 | * A robust implementation would make use of a library that turns the headers | |
477 | * into a BIO from which one folded line is read at a time, and is then split | |
478 | * into a header label and content. We would then parse the content of the | |
479 | * headers we care about. This is overkill for just this limited use-case, but | |
480 | * presumably we also parse rfc822-style headers for S/MIME, so a common | |
481 | * abstraction might well be more generally useful. | |
482 | */ | |
6b691a5c | 483 | int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
0f113f3e | 484 | { |
67787844 VD |
485 | static const char ProcType[] = "Proc-Type:"; |
486 | static const char ENCRYPTED[] = "ENCRYPTED"; | |
487 | static const char DEKInfo[] = "DEK-Info:"; | |
0f113f3e | 488 | const EVP_CIPHER *enc = NULL; |
67787844 | 489 | int ivlen; |
33a6d5a0 | 490 | char *dekinfostart, c; |
0f113f3e MC |
491 | |
492 | cipher->cipher = NULL; | |
10c3c1c1 | 493 | memset(cipher->iv, 0, sizeof(cipher->iv)); |
0f113f3e | 494 | if ((header == NULL) || (*header == '\0') || (*header == '\n')) |
67787844 VD |
495 | return 1; |
496 | ||
497 | if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) { | |
0f113f3e | 498 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_PROC_TYPE); |
67787844 | 499 | return 0; |
0f113f3e | 500 | } |
67787844 VD |
501 | header += sizeof(ProcType)-1; |
502 | header += strspn(header, " \t"); | |
503 | ||
504 | if (*header++ != '4' || *header++ != ',') | |
505 | return 0; | |
506 | header += strspn(header, " \t"); | |
507 | ||
508 | /* We expect "ENCRYPTED" followed by optional white-space + line break */ | |
509 | if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 || | |
510 | strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) { | |
0f113f3e | 511 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_ENCRYPTED); |
67787844 | 512 | return 0; |
0f113f3e | 513 | } |
67787844 VD |
514 | header += sizeof(ENCRYPTED)-1; |
515 | header += strspn(header, " \t\r"); | |
516 | if (*header++ != '\n') { | |
0f113f3e | 517 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_SHORT_HEADER); |
67787844 | 518 | return 0; |
0f113f3e | 519 | } |
67787844 VD |
520 | |
521 | /*- | |
522 | * https://tools.ietf.org/html/rfc1421#section-4.6.1.3 | |
523 | * We expect "DEK-Info: algo[,hex-parameters]" | |
524 | */ | |
525 | if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) { | |
0f113f3e | 526 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_NOT_DEK_INFO); |
67787844 | 527 | return 0; |
0f113f3e | 528 | } |
67787844 VD |
529 | header += sizeof(DEKInfo)-1; |
530 | header += strspn(header, " \t"); | |
0f113f3e | 531 | |
67787844 VD |
532 | /* |
533 | * DEK-INFO is a comma-separated combination of algorithm name and optional | |
534 | * parameters. | |
535 | */ | |
33a6d5a0 | 536 | dekinfostart = header; |
67787844 VD |
537 | header += strcspn(header, " \t,"); |
538 | c = *header; | |
0f113f3e | 539 | *header = '\0'; |
33a6d5a0 | 540 | cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart); |
67787844 VD |
541 | *header = c; |
542 | header += strspn(header, " \t"); | |
0f113f3e MC |
543 | |
544 | if (enc == NULL) { | |
545 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNSUPPORTED_ENCRYPTION); | |
67787844 | 546 | return 0; |
0f113f3e | 547 | } |
67787844 VD |
548 | ivlen = EVP_CIPHER_iv_length(enc); |
549 | if (ivlen > 0 && *header++ != ',') { | |
550 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_MISSING_DEK_IV); | |
551 | return 0; | |
552 | } else if (ivlen == 0 && *header == ',') { | |
553 | PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO, PEM_R_UNEXPECTED_DEK_IV); | |
554 | return 0; | |
555 | } | |
556 | ||
985c3146 | 557 | if (!load_iv(&header, cipher->iv, EVP_CIPHER_iv_length(enc))) |
67787844 | 558 | return 0; |
0f113f3e | 559 | |
67787844 | 560 | return 1; |
0f113f3e | 561 | } |
d02b48c6 | 562 | |
8c3c5701 | 563 | static int load_iv(char **fromp, unsigned char *to, int num) |
0f113f3e MC |
564 | { |
565 | int v, i; | |
566 | char *from; | |
567 | ||
568 | from = *fromp; | |
569 | for (i = 0; i < num; i++) | |
570 | to[i] = 0; | |
571 | num *= 2; | |
572 | for (i = 0; i < num; i++) { | |
49445f21 RS |
573 | v = OPENSSL_hexchar2int(*from); |
574 | if (v < 0) { | |
0f113f3e | 575 | PEMerr(PEM_F_LOAD_IV, PEM_R_BAD_IV_CHARS); |
b4df712a | 576 | return 0; |
0f113f3e MC |
577 | } |
578 | from++; | |
579 | to[i / 2] |= v << (long)((!(i & 1)) * 4); | |
580 | } | |
581 | ||
582 | *fromp = from; | |
b4df712a | 583 | return 1; |
0f113f3e | 584 | } |
d02b48c6 | 585 | |
4b618848 | 586 | #ifndef OPENSSL_NO_STDIO |
edf92f1c | 587 | int PEM_write(FILE *fp, const char *name, const char *header, |
0f113f3e MC |
588 | const unsigned char *data, long len) |
589 | { | |
590 | BIO *b; | |
591 | int ret; | |
592 | ||
593 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
594 | PEMerr(PEM_F_PEM_WRITE, ERR_R_BUF_LIB); | |
b4df712a | 595 | return 0; |
0f113f3e MC |
596 | } |
597 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
598 | ret = PEM_write_bio(b, name, header, data, len); | |
599 | BIO_free(b); | |
b4df712a | 600 | return ret; |
0f113f3e | 601 | } |
d02b48c6 RE |
602 | #endif |
603 | ||
edf92f1c | 604 | int PEM_write_bio(BIO *bp, const char *name, const char *header, |
0f113f3e MC |
605 | const unsigned char *data, long len) |
606 | { | |
607 | int nlen, n, i, j, outl; | |
608 | unsigned char *buf = NULL; | |
601ab315 | 609 | EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); |
0f113f3e | 610 | int reason = ERR_R_BUF_LIB; |
6714cb14 | 611 | int retval = 0; |
0f113f3e | 612 | |
601ab315 RL |
613 | if (ctx == NULL) { |
614 | reason = ERR_R_MALLOC_FAILURE; | |
615 | goto err; | |
616 | } | |
617 | ||
618 | EVP_EncodeInit(ctx); | |
0f113f3e MC |
619 | nlen = strlen(name); |
620 | ||
621 | if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || | |
622 | (BIO_write(bp, name, nlen) != nlen) || | |
623 | (BIO_write(bp, "-----\n", 6) != 6)) | |
624 | goto err; | |
625 | ||
626 | i = strlen(header); | |
627 | if (i > 0) { | |
628 | if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) | |
629 | goto err; | |
630 | } | |
631 | ||
632 | buf = OPENSSL_malloc(PEM_BUFSIZE * 8); | |
633 | if (buf == NULL) { | |
634 | reason = ERR_R_MALLOC_FAILURE; | |
635 | goto err; | |
636 | } | |
637 | ||
638 | i = j = 0; | |
639 | while (len > 0) { | |
640 | n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); | |
cf3404fc MC |
641 | if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n)) |
642 | goto err; | |
0f113f3e MC |
643 | if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) |
644 | goto err; | |
645 | i += outl; | |
646 | len -= n; | |
647 | j += n; | |
648 | } | |
601ab315 | 649 | EVP_EncodeFinal(ctx, buf, &outl); |
0f113f3e MC |
650 | if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) |
651 | goto err; | |
0f113f3e MC |
652 | if ((BIO_write(bp, "-----END ", 9) != 9) || |
653 | (BIO_write(bp, name, nlen) != nlen) || | |
654 | (BIO_write(bp, "-----\n", 6) != 6)) | |
655 | goto err; | |
6714cb14 RS |
656 | retval = i + outl; |
657 | ||
0f113f3e | 658 | err: |
6714cb14 RS |
659 | if (retval == 0) |
660 | PEMerr(PEM_F_PEM_WRITE_BIO, reason); | |
601ab315 | 661 | EVP_ENCODE_CTX_free(ctx); |
c9c56ee5 | 662 | OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
6714cb14 | 663 | return retval; |
0f113f3e | 664 | } |
d02b48c6 | 665 | |
4b618848 | 666 | #ifndef OPENSSL_NO_STDIO |
6b691a5c | 667 | int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, |
0f113f3e MC |
668 | long *len) |
669 | { | |
670 | BIO *b; | |
671 | int ret; | |
672 | ||
673 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
674 | PEMerr(PEM_F_PEM_READ, ERR_R_BUF_LIB); | |
b4df712a | 675 | return 0; |
0f113f3e MC |
676 | } |
677 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
678 | ret = PEM_read_bio(b, name, header, data, len); | |
679 | BIO_free(b); | |
b4df712a | 680 | return ret; |
0f113f3e | 681 | } |
d02b48c6 RE |
682 | #endif |
683 | ||
204afd81 | 684 | /* Some helpers for PEM_read_bio_ex(). */ |
7c43eb5d | 685 | static int sanitize_line(char *linebuf, int len, unsigned int flags, int first_call) |
0f113f3e | 686 | { |
204afd81 | 687 | int i; |
7c43eb5d DB |
688 | if (first_call) { |
689 | /* Other BOMs imply unsupported multibyte encoding, | |
690 | * so don't strip them and let the error raise */ | |
691 | const unsigned char utf8_bom[3] = {0xEF, 0xBB, 0xBF}; | |
692 | ||
693 | if (len > 3 && memcmp(linebuf, utf8_bom, 3) == 0) { | |
694 | memmove(linebuf, linebuf + 3, len - 3); | |
695 | linebuf[len - 3] = 0; | |
696 | len -= 3; | |
697 | } | |
698 | } | |
0f113f3e | 699 | |
204afd81 BK |
700 | if (flags & PEM_FLAG_EAY_COMPATIBLE) { |
701 | /* Strip trailing whitespace */ | |
702 | while ((len >= 0) && (linebuf[len] <= ' ')) | |
703 | len--; | |
704 | /* Go back to whitespace before applying uniform line ending. */ | |
705 | len++; | |
706 | } else if (flags & PEM_FLAG_ONLY_B64) { | |
707 | for (i = 0; i < len; ++i) { | |
a1df06b3 P |
708 | if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n' |
709 | || linebuf[i] == '\r') | |
204afd81 BK |
710 | break; |
711 | } | |
712 | len = i; | |
713 | } else { | |
714 | /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip | |
715 | * control characters in-place and let everything through. */ | |
716 | for (i = 0; i < len; ++i) { | |
717 | if (linebuf[i] == '\n' || linebuf[i] == '\r') | |
718 | break; | |
a1df06b3 | 719 | if (ossl_iscntrl(linebuf[i])) |
204afd81 BK |
720 | linebuf[i] = ' '; |
721 | } | |
722 | len = i; | |
601ab315 | 723 | } |
204afd81 BK |
724 | /* The caller allocated LINESIZE+1, so this is safe. */ |
725 | linebuf[len++] = '\n'; | |
726 | linebuf[len] = '\0'; | |
727 | return len; | |
728 | } | |
601ab315 | 729 | |
204afd81 BK |
730 | #define LINESIZE 255 |
731 | /* Note trailing spaces for begin and end. */ | |
732 | static const char beginstr[] = "-----BEGIN "; | |
733 | static const char endstr[] = "-----END "; | |
734 | static const char tailstr[] = "-----\n"; | |
b0143b97 BK |
735 | #define BEGINLEN ((int)(sizeof(beginstr) - 1)) |
736 | #define ENDLEN ((int)(sizeof(endstr) - 1)) | |
737 | #define TAILLEN ((int)(sizeof(tailstr) - 1)) | |
204afd81 BK |
738 | static int get_name(BIO *bp, char **name, unsigned int flags) |
739 | { | |
740 | char *linebuf; | |
741 | int ret = 0; | |
b0143b97 | 742 | int len; |
7c43eb5d | 743 | int first_call = 1; |
204afd81 BK |
744 | |
745 | /* | |
746 | * Need to hold trailing NUL (accounted for by BIO_gets() and the newline | |
747 | * that will be added by sanitize_line() (the extra '1'). | |
748 | */ | |
749 | linebuf = pem_malloc(LINESIZE + 1, flags); | |
750 | if (linebuf == NULL) { | |
751 | PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE); | |
752 | return 0; | |
0f113f3e MC |
753 | } |
754 | ||
204afd81 BK |
755 | do { |
756 | len = BIO_gets(bp, linebuf, LINESIZE); | |
0f113f3e | 757 | |
204afd81 BK |
758 | if (len <= 0) { |
759 | PEMerr(PEM_F_GET_NAME, PEM_R_NO_START_LINE); | |
0f113f3e MC |
760 | goto err; |
761 | } | |
762 | ||
204afd81 | 763 | /* Strip trailing garbage and standardize ending. */ |
7c43eb5d DB |
764 | len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64, first_call); |
765 | first_call = 0; | |
204afd81 BK |
766 | |
767 | /* Allow leading empty or non-matching lines. */ | |
768 | } while (strncmp(linebuf, beginstr, BEGINLEN) != 0 | |
769 | || len < TAILLEN | |
770 | || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0); | |
771 | linebuf[len - TAILLEN] = '\0'; | |
772 | len = len - BEGINLEN - TAILLEN + 1; | |
773 | *name = pem_malloc(len, flags); | |
774 | if (*name == NULL) { | |
775 | PEMerr(PEM_F_GET_NAME, ERR_R_MALLOC_FAILURE); | |
776 | goto err; | |
777 | } | |
778 | memcpy(*name, linebuf + BEGINLEN, len); | |
779 | ret = 1; | |
780 | ||
781 | err: | |
2ca8bbe5 | 782 | pem_free(linebuf, flags, LINESIZE + 1); |
204afd81 BK |
783 | return ret; |
784 | } | |
785 | ||
786 | /* Keep track of how much of a header we've seen. */ | |
787 | enum header_status { | |
788 | MAYBE_HEADER, | |
789 | IN_HEADER, | |
790 | POST_HEADER | |
791 | }; | |
792 | ||
793 | /** | |
794 | * Extract the optional PEM header, with details on the type of content and | |
795 | * any encryption used on the contents, and the bulk of the data from the bio. | |
796 | * The end of the header is marked by a blank line; if the end-of-input marker | |
797 | * is reached prior to a blank line, there is no header. | |
798 | * | |
799 | * The header and data arguments are BIO** since we may have to swap them | |
800 | * if there is no header, for efficiency. | |
801 | * | |
802 | * We need the name of the PEM-encoded type to verify the end string. | |
803 | */ | |
804 | static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name, | |
805 | unsigned int flags) | |
806 | { | |
807 | BIO *tmp = *header; | |
808 | char *linebuf, *p; | |
0324ffc5 | 809 | int len, line, ret = 0, end = 0, prev_partial_line_read = 0, partial_line_read = 0; |
204afd81 BK |
810 | /* 0 if not seen (yet), 1 if reading header, 2 if finished header */ |
811 | enum header_status got_header = MAYBE_HEADER; | |
812 | unsigned int flags_mask; | |
813 | size_t namelen; | |
814 | ||
815 | /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline | |
816 | * that will be added by sanitize_line() (the extra '1'). */ | |
817 | linebuf = pem_malloc(LINESIZE + 1, flags); | |
818 | if (linebuf == NULL) { | |
819 | PEMerr(PEM_F_GET_HEADER_AND_DATA, ERR_R_MALLOC_FAILURE); | |
820 | return 0; | |
821 | } | |
0f113f3e | 822 | |
204afd81 BK |
823 | for (line = 0; ; line++) { |
824 | flags_mask = ~0u; | |
825 | len = BIO_gets(bp, linebuf, LINESIZE); | |
826 | if (len <= 0) { | |
f523ca66 | 827 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE); |
204afd81 BK |
828 | goto err; |
829 | } | |
0f113f3e | 830 | |
0324ffc5 MB |
831 | /* |
832 | * Check if line has been read completely or if only part of the line | |
833 | * has been read. Keep the previous value to ignore newlines that | |
834 | * appear due to reading a line up until the char before the newline. | |
835 | */ | |
836 | prev_partial_line_read = partial_line_read; | |
837 | partial_line_read = len == LINESIZE-1 && linebuf[LINESIZE-2] != '\n'; | |
838 | ||
204afd81 BK |
839 | if (got_header == MAYBE_HEADER) { |
840 | if (memchr(linebuf, ':', len) != NULL) | |
841 | got_header = IN_HEADER; | |
842 | } | |
843 | if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER) | |
844 | flags_mask &= ~PEM_FLAG_ONLY_B64; | |
7c43eb5d | 845 | len = sanitize_line(linebuf, len, flags & flags_mask, 0); |
204afd81 BK |
846 | |
847 | /* Check for end of header. */ | |
848 | if (linebuf[0] == '\n') { | |
0324ffc5 MB |
849 | /* |
850 | * If previous line has been read only partially this newline is a | |
851 | * regular newline at the end of a line and not an empty line. | |
852 | */ | |
853 | if (!prev_partial_line_read) { | |
854 | if (got_header == POST_HEADER) { | |
855 | /* Another blank line is an error. */ | |
856 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE); | |
857 | goto err; | |
858 | } | |
859 | got_header = POST_HEADER; | |
860 | tmp = *data; | |
0f113f3e | 861 | } |
204afd81 | 862 | continue; |
0f113f3e | 863 | } |
0f113f3e | 864 | |
204afd81 BK |
865 | /* Check for end of stream (which means there is no header). */ |
866 | if (strncmp(linebuf, endstr, ENDLEN) == 0) { | |
867 | p = linebuf + ENDLEN; | |
868 | namelen = strlen(name); | |
869 | if (strncmp(p, name, namelen) != 0 || | |
870 | strncmp(p + namelen, tailstr, TAILLEN) != 0) { | |
871 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE); | |
872 | goto err; | |
873 | } | |
874 | if (got_header == MAYBE_HEADER) { | |
875 | *header = *data; | |
876 | *data = tmp; | |
877 | } | |
0f113f3e | 878 | break; |
204afd81 BK |
879 | } else if (end) { |
880 | /* Malformed input; short line not at end of data. */ | |
881 | PEMerr(PEM_F_GET_HEADER_AND_DATA, PEM_R_BAD_END_LINE); | |
0f113f3e MC |
882 | goto err; |
883 | } | |
204afd81 BK |
884 | /* |
885 | * Else, a line of text -- could be header or data; we don't | |
886 | * know yet. Just pass it through. | |
887 | */ | |
aa8dfbc4 BE |
888 | if (BIO_puts(tmp, linebuf) < 0) |
889 | goto err; | |
204afd81 BK |
890 | /* |
891 | * Only encrypted files need the line length check applied. | |
892 | */ | |
893 | if (got_header == POST_HEADER) { | |
894 | /* 65 includes the trailing newline */ | |
895 | if (len > 65) | |
896 | goto err; | |
897 | if (len < 65) | |
898 | end = 1; | |
0f113f3e | 899 | } |
0f113f3e | 900 | } |
0f113f3e | 901 | |
204afd81 BK |
902 | ret = 1; |
903 | err: | |
2ca8bbe5 | 904 | pem_free(linebuf, flags, LINESIZE + 1); |
204afd81 BK |
905 | return ret; |
906 | } | |
0f113f3e | 907 | |
204afd81 BK |
908 | /** |
909 | * Read in PEM-formatted data from the given BIO. | |
910 | * | |
911 | * By nature of the PEM format, all content must be printable ASCII (except | |
a7eeefea | 912 | * for line endings). Other characters are malformed input and will be rejected. |
204afd81 BK |
913 | */ |
914 | int PEM_read_bio_ex(BIO *bp, char **name_out, char **header, | |
915 | unsigned char **data, long *len_out, unsigned int flags) | |
916 | { | |
917 | EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); | |
918 | const BIO_METHOD *bmeth; | |
919 | BIO *headerB = NULL, *dataB = NULL; | |
920 | char *name = NULL; | |
921 | int len, taillen, headerlen, ret = 0; | |
922 | BUF_MEM * buf_mem; | |
0f113f3e | 923 | |
204afd81 BK |
924 | if (ctx == NULL) { |
925 | PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE); | |
926 | return 0; | |
0f113f3e MC |
927 | } |
928 | ||
204afd81 BK |
929 | *len_out = 0; |
930 | *name_out = *header = NULL; | |
931 | *data = NULL; | |
932 | if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) { | |
933 | /* These two are mutually incompatible; bail out. */ | |
934 | PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_PASSED_INVALID_ARGUMENT); | |
935 | goto end; | |
0f113f3e | 936 | } |
204afd81 BK |
937 | bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem(); |
938 | ||
939 | headerB = BIO_new(bmeth); | |
940 | dataB = BIO_new(bmeth); | |
941 | if (headerB == NULL || dataB == NULL) { | |
942 | PEMerr(PEM_F_PEM_READ_BIO_EX, ERR_R_MALLOC_FAILURE); | |
943 | goto end; | |
0f113f3e | 944 | } |
0f113f3e | 945 | |
204afd81 BK |
946 | if (!get_name(bp, &name, flags)) |
947 | goto end; | |
948 | if (!get_header_and_data(bp, &headerB, &dataB, name, flags)) | |
949 | goto end; | |
950 | ||
951 | EVP_DecodeInit(ctx); | |
952 | BIO_get_mem_ptr(dataB, &buf_mem); | |
953 | len = buf_mem->length; | |
954 | if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len, | |
955 | (unsigned char*)buf_mem->data, len) < 0 | |
956 | || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]), | |
957 | &taillen) < 0) { | |
958 | PEMerr(PEM_F_PEM_READ_BIO_EX, PEM_R_BAD_BASE64_DECODE); | |
959 | goto end; | |
960 | } | |
961 | len += taillen; | |
962 | buf_mem->length = len; | |
963 | ||
964 | /* There was no data in the PEM file; avoid malloc(0). */ | |
965 | if (len == 0) | |
966 | goto end; | |
967 | headerlen = BIO_get_mem_data(headerB, NULL); | |
968 | *header = pem_malloc(headerlen + 1, flags); | |
969 | *data = pem_malloc(len, flags); | |
970 | if (*header == NULL || *data == NULL) { | |
2ca8bbe5 BE |
971 | pem_free(*header, flags, 0); |
972 | pem_free(*data, flags, 0); | |
204afd81 BK |
973 | goto end; |
974 | } | |
975 | BIO_read(headerB, *header, headerlen); | |
976 | (*header)[headerlen] = '\0'; | |
977 | BIO_read(dataB, *data, len); | |
978 | *len_out = len; | |
979 | *name_out = name; | |
980 | name = NULL; | |
981 | ret = 1; | |
982 | ||
983 | end: | |
601ab315 | 984 | EVP_ENCODE_CTX_free(ctx); |
2ca8bbe5 | 985 | pem_free(name, flags, 0); |
204afd81 BK |
986 | BIO_free(headerB); |
987 | BIO_free(dataB); | |
988 | return ret; | |
989 | } | |
990 | ||
991 | int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, | |
992 | long *len) | |
993 | { | |
994 | return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE); | |
0f113f3e MC |
995 | } |
996 | ||
997 | /* | |
998 | * Check pem string and return prefix length. If for example the pem_str == | |
999 | * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the | |
1000 | * string "RSA". | |
d82e2718 DSH |
1001 | */ |
1002 | ||
e4263314 | 1003 | int pem_check_suffix(const char *pem_str, const char *suffix) |
0f113f3e MC |
1004 | { |
1005 | int pem_len = strlen(pem_str); | |
1006 | int suffix_len = strlen(suffix); | |
1007 | const char *p; | |
1008 | if (suffix_len + 1 >= pem_len) | |
1009 | return 0; | |
1010 | p = pem_str + pem_len - suffix_len; | |
1011 | if (strcmp(p, suffix)) | |
1012 | return 0; | |
1013 | p--; | |
1014 | if (*p != ' ') | |
1015 | return 0; | |
1016 | return p - pem_str; | |
1017 | } |