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Commit | Line | Data |
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62867571 | 1 | /* |
3c2bdd7d | 2 | * Copyright 1995-2021 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 | ||
e4468e6d P |
10 | /* We need to use some engine deprecated APIs */ |
11 | #define OPENSSL_SUPPRESS_DEPRECATED | |
12 | ||
d02b48c6 | 13 | #include <stdio.h> |
25f2138b | 14 | #include "crypto/ctype.h" |
67787844 | 15 | #include <string.h> |
b39fc560 | 16 | #include "internal/cryptlib.h" |
ec577822 BM |
17 | #include <openssl/buffer.h> |
18 | #include <openssl/objects.h> | |
19 | #include <openssl/evp.h> | |
20 | #include <openssl/rand.h> | |
21 | #include <openssl/x509.h> | |
22 | #include <openssl/pem.h> | |
095ce353 | 23 | #include <openssl/pkcs12.h> |
25f2138b | 24 | #include "crypto/asn1.h" |
3c27208f RS |
25 | #include <openssl/des.h> |
26 | #include <openssl/engine.h> | |
d02b48c6 | 27 | |
0f113f3e | 28 | #define MIN_LENGTH 4 |
d02b48c6 | 29 | |
0f113f3e | 30 | static int load_iv(char **fromp, unsigned char *to, int num); |
ce1b4fe1 | 31 | static int check_pem(const char *nm, const char *name); |
b78c0166 | 32 | int ossl_pem_check_suffix(const char *pem_str, const char *suffix); |
1241126a | 33 | |
d6d94d33 | 34 | int PEM_def_callback(char *buf, int num, int rwflag, void *userdata) |
0f113f3e | 35 | { |
4977b4e9 | 36 | int i, min_len; |
0f113f3e | 37 | const char *prompt; |
af9895cb | 38 | |
d6d94d33 RL |
39 | /* We assume that the user passes a default password as userdata */ |
40 | if (userdata) { | |
41 | i = strlen(userdata); | |
0f113f3e | 42 | i = (i > num) ? num : i; |
d6d94d33 | 43 | memcpy(buf, userdata, i); |
af9895cb | 44 | return i; |
0f113f3e MC |
45 | } |
46 | ||
47 | prompt = EVP_get_pw_prompt(); | |
48 | if (prompt == NULL) | |
49 | prompt = "Enter PEM pass phrase:"; | |
50 | ||
4977b4e9 | 51 | /* |
d6d94d33 RL |
52 | * rwflag == 0 means decryption |
53 | * rwflag == 1 means encryption | |
54 | * | |
55 | * We assume that for encryption, we want a minimum length, while for | |
56 | * decryption, we cannot know any minimum length, so we assume zero. | |
4977b4e9 | 57 | */ |
d6d94d33 | 58 | min_len = rwflag ? MIN_LENGTH : 0; |
b160f282 | 59 | |
d6d94d33 | 60 | i = EVP_read_pw_string_min(buf, min_len, num, prompt, rwflag); |
4977b4e9 | 61 | if (i != 0) { |
9311d0c4 | 62 | ERR_raise(ERR_LIB_PEM, PEM_R_PROBLEMS_GETTING_PASSWORD); |
4977b4e9 RL |
63 | memset(buf, 0, (unsigned int)num); |
64 | return -1; | |
0f113f3e | 65 | } |
4977b4e9 | 66 | return strlen(buf); |
0f113f3e | 67 | } |
d02b48c6 | 68 | |
6b691a5c | 69 | void PEM_proc_type(char *buf, int type) |
0f113f3e MC |
70 | { |
71 | const char *str; | |
86ba26c8 | 72 | char *p = buf + strlen(buf); |
0f113f3e MC |
73 | |
74 | if (type == PEM_TYPE_ENCRYPTED) | |
75 | str = "ENCRYPTED"; | |
76 | else if (type == PEM_TYPE_MIC_CLEAR) | |
77 | str = "MIC-CLEAR"; | |
78 | else if (type == PEM_TYPE_MIC_ONLY) | |
79 | str = "MIC-ONLY"; | |
80 | else | |
81 | str = "BAD-TYPE"; | |
82 | ||
86ba26c8 | 83 | BIO_snprintf(p, PEM_BUFSIZE - (size_t)(p - buf), "Proc-Type: 4,%s\n", str); |
0f113f3e | 84 | } |
d02b48c6 | 85 | |
de0799b0 | 86 | void PEM_dek_info(char *buf, const char *type, int len, const char *str) |
0f113f3e | 87 | { |
0f113f3e | 88 | long i; |
86ba26c8 P |
89 | char *p = buf + strlen(buf); |
90 | int j = PEM_BUFSIZE - (size_t)(p - buf), n; | |
91 | ||
92 | n = BIO_snprintf(p, j, "DEK-Info: %s,", type); | |
93 | if (n > 0) { | |
94 | j -= n; | |
95 | p += n; | |
96 | for (i = 0; i < len; i++) { | |
97 | n = BIO_snprintf(p, j, "%02X", 0xff & str[i]); | |
98 | if (n <= 0) | |
99 | return; | |
100 | j -= n; | |
101 | p += n; | |
102 | } | |
103 | if (j > 1) | |
104 | strcpy(p, "\n"); | |
0f113f3e | 105 | } |
0f113f3e | 106 | } |
d02b48c6 | 107 | |
4b618848 | 108 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 109 | void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x, |
0f113f3e MC |
110 | pem_password_cb *cb, void *u) |
111 | { | |
112 | BIO *b; | |
113 | void *ret; | |
114 | ||
115 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
9311d0c4 | 116 | ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); |
b4df712a | 117 | return 0; |
0f113f3e MC |
118 | } |
119 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
120 | ret = PEM_ASN1_read_bio(d2i, name, b, x, cb, u); | |
121 | BIO_free(b); | |
b4df712a | 122 | return ret; |
0f113f3e | 123 | } |
d02b48c6 RE |
124 | #endif |
125 | ||
ce1b4fe1 DSH |
126 | static int check_pem(const char *nm, const char *name) |
127 | { | |
0f113f3e | 128 | /* Normal matching nm and name */ |
86885c28 | 129 | if (strcmp(nm, name) == 0) |
0f113f3e MC |
130 | return 1; |
131 | ||
132 | /* Make PEM_STRING_EVP_PKEY match any private key */ | |
133 | ||
86885c28 | 134 | if (strcmp(name, PEM_STRING_EVP_PKEY) == 0) { |
0f113f3e MC |
135 | int slen; |
136 | const EVP_PKEY_ASN1_METHOD *ameth; | |
86885c28 | 137 | if (strcmp(nm, PEM_STRING_PKCS8) == 0) |
0f113f3e | 138 | return 1; |
86885c28 | 139 | if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) |
0f113f3e | 140 | return 1; |
b78c0166 | 141 | slen = ossl_pem_check_suffix(nm, "PRIVATE KEY"); |
0f113f3e MC |
142 | if (slen > 0) { |
143 | /* | |
60250017 | 144 | * NB: ENGINE implementations won't contain a deprecated old |
0f113f3e MC |
145 | * private key decode function so don't look for them. |
146 | */ | |
147 | ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen); | |
148 | if (ameth && ameth->old_priv_decode) | |
149 | return 1; | |
150 | } | |
151 | return 0; | |
152 | } | |
153 | ||
86885c28 | 154 | if (strcmp(name, PEM_STRING_PARAMETERS) == 0) { |
0f113f3e MC |
155 | int slen; |
156 | const EVP_PKEY_ASN1_METHOD *ameth; | |
b78c0166 | 157 | slen = ossl_pem_check_suffix(nm, "PARAMETERS"); |
0f113f3e MC |
158 | if (slen > 0) { |
159 | ENGINE *e; | |
160 | ameth = EVP_PKEY_asn1_find_str(&e, nm, slen); | |
161 | if (ameth) { | |
162 | int r; | |
163 | if (ameth->param_decode) | |
164 | r = 1; | |
165 | else | |
166 | r = 0; | |
01b8b3c7 | 167 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd | 168 | ENGINE_finish(e); |
01b8b3c7 | 169 | #endif |
0f113f3e MC |
170 | return r; |
171 | } | |
172 | } | |
173 | return 0; | |
174 | } | |
175 | /* If reading DH parameters handle X9.42 DH format too */ | |
86885c28 RS |
176 | if (strcmp(nm, PEM_STRING_DHXPARAMS) == 0 |
177 | && strcmp(name, PEM_STRING_DHPARAMS) == 0) | |
0f113f3e | 178 | return 1; |
3e4585c8 | 179 | |
0f113f3e | 180 | /* Permit older strings */ |
ce1b4fe1 | 181 | |
86885c28 RS |
182 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
183 | && strcmp(name, PEM_STRING_X509) == 0) | |
0f113f3e | 184 | return 1; |
ce1b4fe1 | 185 | |
86885c28 RS |
186 | if (strcmp(nm, PEM_STRING_X509_REQ_OLD) == 0 |
187 | && strcmp(name, PEM_STRING_X509_REQ) == 0) | |
0f113f3e | 188 | return 1; |
ce1b4fe1 | 189 | |
0f113f3e | 190 | /* Allow normal certs to be read as trusted certs */ |
86885c28 RS |
191 | if (strcmp(nm, PEM_STRING_X509) == 0 |
192 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 193 | return 1; |
ce1b4fe1 | 194 | |
86885c28 RS |
195 | if (strcmp(nm, PEM_STRING_X509_OLD) == 0 |
196 | && strcmp(name, PEM_STRING_X509_TRUSTED) == 0) | |
0f113f3e | 197 | return 1; |
ce1b4fe1 | 198 | |
0f113f3e | 199 | /* Some CAs use PKCS#7 with CERTIFICATE headers */ |
86885c28 RS |
200 | if (strcmp(nm, PEM_STRING_X509) == 0 |
201 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 202 | return 1; |
3142c86d | 203 | |
86885c28 RS |
204 | if (strcmp(nm, PEM_STRING_PKCS7_SIGNED) == 0 |
205 | && strcmp(name, PEM_STRING_PKCS7) == 0) | |
0f113f3e | 206 | return 1; |
2401debe | 207 | |
8931b30d | 208 | #ifndef OPENSSL_NO_CMS |
86885c28 RS |
209 | if (strcmp(nm, PEM_STRING_X509) == 0 |
210 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e MC |
211 | return 1; |
212 | /* Allow CMS to be read from PKCS#7 headers */ | |
86885c28 RS |
213 | if (strcmp(nm, PEM_STRING_PKCS7) == 0 |
214 | && strcmp(name, PEM_STRING_CMS) == 0) | |
0f113f3e | 215 | return 1; |
8931b30d DSH |
216 | #endif |
217 | ||
0f113f3e | 218 | return 0; |
ce1b4fe1 DSH |
219 | } |
220 | ||
2ca8bbe5 | 221 | static void pem_free(void *p, unsigned int flags, size_t num) |
204afd81 BK |
222 | { |
223 | if (flags & PEM_FLAG_SECURE) | |
2ca8bbe5 | 224 | OPENSSL_secure_clear_free(p, num); |
204afd81 BK |
225 | else |
226 | OPENSSL_free(p); | |
227 | } | |
228 | ||
229 | static void *pem_malloc(int num, unsigned int flags) | |
230 | { | |
231 | return (flags & PEM_FLAG_SECURE) ? OPENSSL_secure_malloc(num) | |
232 | : OPENSSL_malloc(num); | |
233 | } | |
234 | ||
7671342e BK |
235 | static int pem_bytes_read_bio_flags(unsigned char **pdata, long *plen, |
236 | char **pnm, const char *name, BIO *bp, | |
237 | pem_password_cb *cb, void *u, | |
238 | unsigned int flags) | |
0f113f3e MC |
239 | { |
240 | EVP_CIPHER_INFO cipher; | |
241 | char *nm = NULL, *header = NULL; | |
242 | unsigned char *data = NULL; | |
2ca8bbe5 | 243 | long len = 0; |
0f113f3e MC |
244 | int ret = 0; |
245 | ||
7671342e | 246 | do { |
2ca8bbe5 BE |
247 | pem_free(nm, flags, 0); |
248 | pem_free(header, flags, 0); | |
249 | pem_free(data, flags, len); | |
7671342e | 250 | if (!PEM_read_bio_ex(bp, &nm, &header, &data, &len, flags)) { |
0f113f3e MC |
251 | if (ERR_GET_REASON(ERR_peek_error()) == PEM_R_NO_START_LINE) |
252 | ERR_add_error_data(2, "Expecting: ", name); | |
253 | return 0; | |
254 | } | |
7671342e | 255 | } while (!check_pem(nm, name)); |
0f113f3e MC |
256 | if (!PEM_get_EVP_CIPHER_INFO(header, &cipher)) |
257 | goto err; | |
258 | if (!PEM_do_header(&cipher, data, &len, cb, u)) | |
259 | goto err; | |
260 | ||
261 | *pdata = data; | |
262 | *plen = len; | |
263 | ||
7671342e | 264 | if (pnm != NULL) |
0f113f3e MC |
265 | *pnm = nm; |
266 | ||
267 | ret = 1; | |
268 | ||
269 | err: | |
7671342e | 270 | if (!ret || pnm == NULL) |
2ca8bbe5 BE |
271 | pem_free(nm, flags, 0); |
272 | pem_free(header, flags, 0); | |
0f113f3e | 273 | if (!ret) |
2ca8bbe5 | 274 | pem_free(data, flags, len); |
0f113f3e MC |
275 | return ret; |
276 | } | |
d02b48c6 | 277 | |
7671342e BK |
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 | return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, | |
282 | PEM_FLAG_EAY_COMPATIBLE); | |
283 | } | |
284 | ||
285 | int PEM_bytes_read_bio_secmem(unsigned char **pdata, long *plen, char **pnm, | |
286 | const char *name, BIO *bp, pem_password_cb *cb, | |
287 | void *u) { | |
288 | return pem_bytes_read_bio_flags(pdata, plen, pnm, name, bp, cb, u, | |
289 | PEM_FLAG_SECURE | PEM_FLAG_EAY_COMPATIBLE); | |
290 | } | |
291 | ||
4b618848 | 292 | #ifndef OPENSSL_NO_STDIO |
8bb826ee | 293 | int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp, |
de0799b0 RL |
294 | const void *x, const EVP_CIPHER *enc, |
295 | const unsigned char *kstr, int klen, | |
296 | pem_password_cb *callback, void *u) | |
0f113f3e MC |
297 | { |
298 | BIO *b; | |
299 | int ret; | |
300 | ||
301 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
9311d0c4 | 302 | ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); |
b4df712a | 303 | return 0; |
0f113f3e MC |
304 | } |
305 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
306 | ret = PEM_ASN1_write_bio(i2d, name, b, x, enc, kstr, klen, callback, u); | |
307 | BIO_free(b); | |
b4df712a | 308 | return ret; |
0f113f3e | 309 | } |
d02b48c6 RE |
310 | #endif |
311 | ||
8bb826ee | 312 | int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp, |
de0799b0 RL |
313 | const void *x, const EVP_CIPHER *enc, |
314 | const unsigned char *kstr, int klen, | |
315 | pem_password_cb *callback, void *u) | |
0f113f3e | 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) { | |
ed576acd TM |
326 | objstr = EVP_CIPHER_get0_name(enc); |
327 | if (objstr == NULL || EVP_CIPHER_get_iv_length(enc) == 0 | |
328 | || EVP_CIPHER_get_iv_length(enc) > (int)sizeof(iv) | |
e40ada04 MC |
329 | /* |
330 | * Check "Proc-Type: 4,Encrypted\nDEK-Info: objstr,hex-iv\n" | |
331 | * fits into buf | |
332 | */ | |
ed576acd | 333 | || strlen(objstr) + 23 + 2 * EVP_CIPHER_get_iv_length(enc) + 13 |
e40ada04 | 334 | > sizeof(buf)) { |
9311d0c4 | 335 | ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_CIPHER); |
0f113f3e MC |
336 | goto err; |
337 | } | |
338 | } | |
339 | ||
e0137ca9 | 340 | if ((dsize = i2d(x, NULL)) <= 0) { |
9311d0c4 | 341 | ERR_raise(ERR_LIB_PEM, ERR_R_ASN1_LIB); |
0f113f3e MC |
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 | 348 | if (data == NULL) { |
9311d0c4 | 349 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
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) { | |
9311d0c4 | 362 | ERR_raise(ERR_LIB_PEM, PEM_R_READ_KEY); |
0f113f3e MC |
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 | } | |
ed576acd TM |
371 | /* Generate a salt */ |
372 | if (RAND_bytes(iv, EVP_CIPHER_get_iv_length(enc)) <= 0) | |
0f113f3e MC |
373 | goto err; |
374 | /* | |
375 | * The 'iv' is used as the iv and as a salt. It is NOT taken from | |
376 | * the BytesToKey function | |
377 | */ | |
378 | if (!EVP_BytesToKey(enc, EVP_md5(), iv, kstr, klen, 1, key, NULL)) | |
379 | goto err; | |
380 | ||
381 | if (kstr == (unsigned char *)buf) | |
382 | OPENSSL_cleanse(buf, PEM_BUFSIZE); | |
383 | ||
0f113f3e MC |
384 | buf[0] = '\0'; |
385 | PEM_proc_type(buf, PEM_TYPE_ENCRYPTED); | |
ed576acd | 386 | PEM_dek_info(buf, objstr, EVP_CIPHER_get_iv_length(enc), (char *)iv); |
0f113f3e MC |
387 | /* k=strlen(buf); */ |
388 | ||
0f113f3e | 389 | ret = 1; |
846ec07d RL |
390 | if ((ctx = EVP_CIPHER_CTX_new()) == NULL |
391 | || !EVP_EncryptInit_ex(ctx, enc, NULL, key, iv) | |
392 | || !EVP_EncryptUpdate(ctx, data, &j, data, i) | |
393 | || !EVP_EncryptFinal_ex(ctx, &(data[j]), &i)) | |
0f113f3e | 394 | ret = 0; |
0f113f3e MC |
395 | if (ret == 0) |
396 | goto err; | |
397 | i += j; | |
398 | } else { | |
399 | ret = 1; | |
400 | buf[0] = '\0'; | |
401 | } | |
402 | i = PEM_write_bio(bp, name, buf, data, i); | |
403 | if (i <= 0) | |
404 | ret = 0; | |
405 | err: | |
406 | OPENSSL_cleanse(key, sizeof(key)); | |
407 | OPENSSL_cleanse(iv, sizeof(iv)); | |
846ec07d | 408 | EVP_CIPHER_CTX_free(ctx); |
0f113f3e | 409 | OPENSSL_cleanse(buf, PEM_BUFSIZE); |
4b45c6e5 | 410 | OPENSSL_clear_free(data, (unsigned int)dsize); |
b4df712a | 411 | return ret; |
0f113f3e | 412 | } |
d02b48c6 | 413 | |
6b691a5c | 414 | int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen, |
0f113f3e MC |
415 | pem_password_cb *callback, void *u) |
416 | { | |
67787844 VD |
417 | int ok; |
418 | int keylen; | |
419 | long len = *plen; | |
420 | int ilen = (int) len; /* EVP_DecryptUpdate etc. take int lengths */ | |
846ec07d | 421 | EVP_CIPHER_CTX *ctx; |
0f113f3e MC |
422 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
423 | char buf[PEM_BUFSIZE]; | |
424 | ||
67787844 VD |
425 | #if LONG_MAX > INT_MAX |
426 | /* Check that we did not truncate the length */ | |
427 | if (len > INT_MAX) { | |
9311d0c4 | 428 | ERR_raise(ERR_LIB_PEM, PEM_R_HEADER_TOO_LONG); |
67787844 VD |
429 | return 0; |
430 | } | |
431 | #endif | |
0f113f3e MC |
432 | |
433 | if (cipher->cipher == NULL) | |
67787844 | 434 | return 1; |
0f113f3e | 435 | if (callback == NULL) |
67787844 | 436 | keylen = PEM_def_callback(buf, PEM_BUFSIZE, 0, u); |
0f113f3e | 437 | else |
67787844 | 438 | keylen = callback(buf, PEM_BUFSIZE, 0, u); |
c82c3462 | 439 | if (keylen < 0) { |
9311d0c4 | 440 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_PASSWORD_READ); |
67787844 | 441 | return 0; |
0f113f3e | 442 | } |
a53955d8 | 443 | #ifdef CHARSET_EBCDIC |
0f113f3e | 444 | /* Convert the pass phrase from EBCDIC */ |
67787844 | 445 | ebcdic2ascii(buf, buf, keylen); |
a53955d8 UM |
446 | #endif |
447 | ||
0f113f3e | 448 | if (!EVP_BytesToKey(cipher->cipher, EVP_md5(), &(cipher->iv[0]), |
67787844 | 449 | (unsigned char *)buf, keylen, 1, key, NULL)) |
0f113f3e MC |
450 | return 0; |
451 | ||
846ec07d RL |
452 | ctx = EVP_CIPHER_CTX_new(); |
453 | if (ctx == NULL) | |
454 | return 0; | |
67787844 VD |
455 | |
456 | ok = EVP_DecryptInit_ex(ctx, cipher->cipher, NULL, key, &(cipher->iv[0])); | |
457 | if (ok) | |
458 | ok = EVP_DecryptUpdate(ctx, data, &ilen, data, ilen); | |
459 | if (ok) { | |
460 | /* Squirrel away the length of data decrypted so far. */ | |
461 | *plen = ilen; | |
462 | ok = EVP_DecryptFinal_ex(ctx, &(data[ilen]), &ilen); | |
463 | } | |
464 | if (ok) | |
465 | *plen += ilen; | |
466 | else | |
9311d0c4 | 467 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_DECRYPT); |
67787844 | 468 | |
846ec07d | 469 | EVP_CIPHER_CTX_free(ctx); |
0f113f3e MC |
470 | OPENSSL_cleanse((char *)buf, sizeof(buf)); |
471 | OPENSSL_cleanse((char *)key, sizeof(key)); | |
67787844 | 472 | return ok; |
0f113f3e | 473 | } |
d02b48c6 | 474 | |
67787844 VD |
475 | /* |
476 | * This implements a very limited PEM header parser that does not support the | |
477 | * full grammar of rfc1421. In particular, folded headers are not supported, | |
478 | * nor is additional whitespace. | |
479 | * | |
480 | * A robust implementation would make use of a library that turns the headers | |
481 | * into a BIO from which one folded line is read at a time, and is then split | |
482 | * into a header label and content. We would then parse the content of the | |
483 | * headers we care about. This is overkill for just this limited use-case, but | |
484 | * presumably we also parse rfc822-style headers for S/MIME, so a common | |
485 | * abstraction might well be more generally useful. | |
486 | */ | |
6b691a5c | 487 | int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher) |
0f113f3e | 488 | { |
67787844 VD |
489 | static const char ProcType[] = "Proc-Type:"; |
490 | static const char ENCRYPTED[] = "ENCRYPTED"; | |
491 | static const char DEKInfo[] = "DEK-Info:"; | |
0f113f3e | 492 | const EVP_CIPHER *enc = NULL; |
67787844 | 493 | int ivlen; |
33a6d5a0 | 494 | char *dekinfostart, c; |
0f113f3e MC |
495 | |
496 | cipher->cipher = NULL; | |
10c3c1c1 | 497 | memset(cipher->iv, 0, sizeof(cipher->iv)); |
0f113f3e | 498 | if ((header == NULL) || (*header == '\0') || (*header == '\n')) |
67787844 VD |
499 | return 1; |
500 | ||
501 | if (strncmp(header, ProcType, sizeof(ProcType)-1) != 0) { | |
9311d0c4 | 502 | ERR_raise(ERR_LIB_PEM, PEM_R_NOT_PROC_TYPE); |
67787844 | 503 | return 0; |
0f113f3e | 504 | } |
67787844 VD |
505 | header += sizeof(ProcType)-1; |
506 | header += strspn(header, " \t"); | |
507 | ||
508 | if (*header++ != '4' || *header++ != ',') | |
509 | return 0; | |
510 | header += strspn(header, " \t"); | |
511 | ||
512 | /* We expect "ENCRYPTED" followed by optional white-space + line break */ | |
513 | if (strncmp(header, ENCRYPTED, sizeof(ENCRYPTED)-1) != 0 || | |
514 | strspn(header+sizeof(ENCRYPTED)-1, " \t\r\n") == 0) { | |
9311d0c4 | 515 | ERR_raise(ERR_LIB_PEM, PEM_R_NOT_ENCRYPTED); |
67787844 | 516 | return 0; |
0f113f3e | 517 | } |
67787844 VD |
518 | header += sizeof(ENCRYPTED)-1; |
519 | header += strspn(header, " \t\r"); | |
520 | if (*header++ != '\n') { | |
9311d0c4 | 521 | ERR_raise(ERR_LIB_PEM, PEM_R_SHORT_HEADER); |
67787844 | 522 | return 0; |
0f113f3e | 523 | } |
67787844 VD |
524 | |
525 | /*- | |
526 | * https://tools.ietf.org/html/rfc1421#section-4.6.1.3 | |
527 | * We expect "DEK-Info: algo[,hex-parameters]" | |
528 | */ | |
529 | if (strncmp(header, DEKInfo, sizeof(DEKInfo)-1) != 0) { | |
9311d0c4 | 530 | ERR_raise(ERR_LIB_PEM, PEM_R_NOT_DEK_INFO); |
67787844 | 531 | return 0; |
0f113f3e | 532 | } |
67787844 VD |
533 | header += sizeof(DEKInfo)-1; |
534 | header += strspn(header, " \t"); | |
0f113f3e | 535 | |
67787844 VD |
536 | /* |
537 | * DEK-INFO is a comma-separated combination of algorithm name and optional | |
538 | * parameters. | |
539 | */ | |
33a6d5a0 | 540 | dekinfostart = header; |
67787844 VD |
541 | header += strcspn(header, " \t,"); |
542 | c = *header; | |
0f113f3e | 543 | *header = '\0'; |
33a6d5a0 | 544 | cipher->cipher = enc = EVP_get_cipherbyname(dekinfostart); |
67787844 VD |
545 | *header = c; |
546 | header += strspn(header, " \t"); | |
0f113f3e MC |
547 | |
548 | if (enc == NULL) { | |
9311d0c4 | 549 | ERR_raise(ERR_LIB_PEM, PEM_R_UNSUPPORTED_ENCRYPTION); |
67787844 | 550 | return 0; |
0f113f3e | 551 | } |
ed576acd | 552 | ivlen = EVP_CIPHER_get_iv_length(enc); |
67787844 | 553 | if (ivlen > 0 && *header++ != ',') { |
9311d0c4 | 554 | ERR_raise(ERR_LIB_PEM, PEM_R_MISSING_DEK_IV); |
67787844 VD |
555 | return 0; |
556 | } else if (ivlen == 0 && *header == ',') { | |
9311d0c4 | 557 | ERR_raise(ERR_LIB_PEM, PEM_R_UNEXPECTED_DEK_IV); |
67787844 VD |
558 | return 0; |
559 | } | |
560 | ||
ed576acd | 561 | if (!load_iv(&header, cipher->iv, EVP_CIPHER_get_iv_length(enc))) |
67787844 | 562 | return 0; |
0f113f3e | 563 | |
67787844 | 564 | return 1; |
0f113f3e | 565 | } |
d02b48c6 | 566 | |
8c3c5701 | 567 | static int load_iv(char **fromp, unsigned char *to, int num) |
0f113f3e MC |
568 | { |
569 | int v, i; | |
570 | char *from; | |
571 | ||
572 | from = *fromp; | |
573 | for (i = 0; i < num; i++) | |
574 | to[i] = 0; | |
575 | num *= 2; | |
576 | for (i = 0; i < num; i++) { | |
49445f21 RS |
577 | v = OPENSSL_hexchar2int(*from); |
578 | if (v < 0) { | |
9311d0c4 | 579 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_IV_CHARS); |
b4df712a | 580 | return 0; |
0f113f3e MC |
581 | } |
582 | from++; | |
583 | to[i / 2] |= v << (long)((!(i & 1)) * 4); | |
584 | } | |
585 | ||
586 | *fromp = from; | |
b4df712a | 587 | return 1; |
0f113f3e | 588 | } |
d02b48c6 | 589 | |
4b618848 | 590 | #ifndef OPENSSL_NO_STDIO |
edf92f1c | 591 | int PEM_write(FILE *fp, const char *name, const char *header, |
0f113f3e MC |
592 | const unsigned char *data, long len) |
593 | { | |
594 | BIO *b; | |
595 | int ret; | |
596 | ||
597 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
9311d0c4 | 598 | ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); |
b4df712a | 599 | return 0; |
0f113f3e MC |
600 | } |
601 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
602 | ret = PEM_write_bio(b, name, header, data, len); | |
603 | BIO_free(b); | |
b4df712a | 604 | return ret; |
0f113f3e | 605 | } |
d02b48c6 RE |
606 | #endif |
607 | ||
edf92f1c | 608 | int PEM_write_bio(BIO *bp, const char *name, const char *header, |
0f113f3e MC |
609 | const unsigned char *data, long len) |
610 | { | |
611 | int nlen, n, i, j, outl; | |
612 | unsigned char *buf = NULL; | |
601ab315 | 613 | EVP_ENCODE_CTX *ctx = EVP_ENCODE_CTX_new(); |
0f113f3e | 614 | int reason = ERR_R_BUF_LIB; |
6714cb14 | 615 | int retval = 0; |
0f113f3e | 616 | |
601ab315 RL |
617 | if (ctx == NULL) { |
618 | reason = ERR_R_MALLOC_FAILURE; | |
619 | goto err; | |
620 | } | |
621 | ||
622 | EVP_EncodeInit(ctx); | |
0f113f3e MC |
623 | nlen = strlen(name); |
624 | ||
625 | if ((BIO_write(bp, "-----BEGIN ", 11) != 11) || | |
626 | (BIO_write(bp, name, nlen) != nlen) || | |
627 | (BIO_write(bp, "-----\n", 6) != 6)) | |
628 | goto err; | |
629 | ||
630 | i = strlen(header); | |
631 | if (i > 0) { | |
632 | if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) | |
633 | goto err; | |
634 | } | |
635 | ||
636 | buf = OPENSSL_malloc(PEM_BUFSIZE * 8); | |
637 | if (buf == NULL) { | |
638 | reason = ERR_R_MALLOC_FAILURE; | |
639 | goto err; | |
640 | } | |
641 | ||
642 | i = j = 0; | |
643 | while (len > 0) { | |
644 | n = (int)((len > (PEM_BUFSIZE * 5)) ? (PEM_BUFSIZE * 5) : len); | |
cf3404fc MC |
645 | if (!EVP_EncodeUpdate(ctx, buf, &outl, &(data[j]), n)) |
646 | goto err; | |
0f113f3e MC |
647 | if ((outl) && (BIO_write(bp, (char *)buf, outl) != outl)) |
648 | goto err; | |
649 | i += outl; | |
650 | len -= n; | |
651 | j += n; | |
652 | } | |
601ab315 | 653 | EVP_EncodeFinal(ctx, buf, &outl); |
0f113f3e MC |
654 | if ((outl > 0) && (BIO_write(bp, (char *)buf, outl) != outl)) |
655 | goto err; | |
0f113f3e MC |
656 | if ((BIO_write(bp, "-----END ", 9) != 9) || |
657 | (BIO_write(bp, name, nlen) != nlen) || | |
658 | (BIO_write(bp, "-----\n", 6) != 6)) | |
659 | goto err; | |
6714cb14 RS |
660 | retval = i + outl; |
661 | ||
0f113f3e | 662 | err: |
6714cb14 | 663 | if (retval == 0) |
9311d0c4 | 664 | ERR_raise(ERR_LIB_PEM, reason); |
601ab315 | 665 | EVP_ENCODE_CTX_free(ctx); |
c9c56ee5 | 666 | OPENSSL_clear_free(buf, PEM_BUFSIZE * 8); |
6714cb14 | 667 | return retval; |
0f113f3e | 668 | } |
d02b48c6 | 669 | |
4b618848 | 670 | #ifndef OPENSSL_NO_STDIO |
6b691a5c | 671 | int PEM_read(FILE *fp, char **name, char **header, unsigned char **data, |
0f113f3e MC |
672 | long *len) |
673 | { | |
674 | BIO *b; | |
675 | int ret; | |
676 | ||
677 | if ((b = BIO_new(BIO_s_file())) == NULL) { | |
9311d0c4 | 678 | ERR_raise(ERR_LIB_PEM, ERR_R_BUF_LIB); |
b4df712a | 679 | return 0; |
0f113f3e MC |
680 | } |
681 | BIO_set_fp(b, fp, BIO_NOCLOSE); | |
682 | ret = PEM_read_bio(b, name, header, data, len); | |
683 | BIO_free(b); | |
b4df712a | 684 | return ret; |
0f113f3e | 685 | } |
d02b48c6 RE |
686 | #endif |
687 | ||
204afd81 | 688 | /* Some helpers for PEM_read_bio_ex(). */ |
7c43eb5d | 689 | static int sanitize_line(char *linebuf, int len, unsigned int flags, int first_call) |
0f113f3e | 690 | { |
204afd81 | 691 | int i; |
7c43eb5d DB |
692 | if (first_call) { |
693 | /* Other BOMs imply unsupported multibyte encoding, | |
694 | * so don't strip them and let the error raise */ | |
695 | const unsigned char utf8_bom[3] = {0xEF, 0xBB, 0xBF}; | |
696 | ||
697 | if (len > 3 && memcmp(linebuf, utf8_bom, 3) == 0) { | |
698 | memmove(linebuf, linebuf + 3, len - 3); | |
699 | linebuf[len - 3] = 0; | |
700 | len -= 3; | |
701 | } | |
702 | } | |
0f113f3e | 703 | |
204afd81 BK |
704 | if (flags & PEM_FLAG_EAY_COMPATIBLE) { |
705 | /* Strip trailing whitespace */ | |
706 | while ((len >= 0) && (linebuf[len] <= ' ')) | |
707 | len--; | |
708 | /* Go back to whitespace before applying uniform line ending. */ | |
709 | len++; | |
710 | } else if (flags & PEM_FLAG_ONLY_B64) { | |
711 | for (i = 0; i < len; ++i) { | |
a1df06b3 P |
712 | if (!ossl_isbase64(linebuf[i]) || linebuf[i] == '\n' |
713 | || linebuf[i] == '\r') | |
204afd81 BK |
714 | break; |
715 | } | |
716 | len = i; | |
717 | } else { | |
718 | /* EVP_DecodeBlock strips leading and trailing whitespace, so just strip | |
719 | * control characters in-place and let everything through. */ | |
720 | for (i = 0; i < len; ++i) { | |
721 | if (linebuf[i] == '\n' || linebuf[i] == '\r') | |
722 | break; | |
a1df06b3 | 723 | if (ossl_iscntrl(linebuf[i])) |
204afd81 BK |
724 | linebuf[i] = ' '; |
725 | } | |
726 | len = i; | |
601ab315 | 727 | } |
204afd81 BK |
728 | /* The caller allocated LINESIZE+1, so this is safe. */ |
729 | linebuf[len++] = '\n'; | |
730 | linebuf[len] = '\0'; | |
731 | return len; | |
732 | } | |
601ab315 | 733 | |
204afd81 BK |
734 | #define LINESIZE 255 |
735 | /* Note trailing spaces for begin and end. */ | |
736 | static const char beginstr[] = "-----BEGIN "; | |
737 | static const char endstr[] = "-----END "; | |
738 | static const char tailstr[] = "-----\n"; | |
b0143b97 BK |
739 | #define BEGINLEN ((int)(sizeof(beginstr) - 1)) |
740 | #define ENDLEN ((int)(sizeof(endstr) - 1)) | |
741 | #define TAILLEN ((int)(sizeof(tailstr) - 1)) | |
204afd81 BK |
742 | static int get_name(BIO *bp, char **name, unsigned int flags) |
743 | { | |
744 | char *linebuf; | |
745 | int ret = 0; | |
b0143b97 | 746 | int len; |
7c43eb5d | 747 | int first_call = 1; |
204afd81 BK |
748 | |
749 | /* | |
750 | * Need to hold trailing NUL (accounted for by BIO_gets() and the newline | |
751 | * that will be added by sanitize_line() (the extra '1'). | |
752 | */ | |
753 | linebuf = pem_malloc(LINESIZE + 1, flags); | |
754 | if (linebuf == NULL) { | |
9311d0c4 | 755 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
204afd81 | 756 | return 0; |
0f113f3e MC |
757 | } |
758 | ||
204afd81 BK |
759 | do { |
760 | len = BIO_gets(bp, linebuf, LINESIZE); | |
0f113f3e | 761 | |
204afd81 | 762 | if (len <= 0) { |
9311d0c4 | 763 | ERR_raise(ERR_LIB_PEM, PEM_R_NO_START_LINE); |
0f113f3e MC |
764 | goto err; |
765 | } | |
766 | ||
204afd81 | 767 | /* Strip trailing garbage and standardize ending. */ |
7c43eb5d DB |
768 | len = sanitize_line(linebuf, len, flags & ~PEM_FLAG_ONLY_B64, first_call); |
769 | first_call = 0; | |
204afd81 BK |
770 | |
771 | /* Allow leading empty or non-matching lines. */ | |
772 | } while (strncmp(linebuf, beginstr, BEGINLEN) != 0 | |
773 | || len < TAILLEN | |
774 | || strncmp(linebuf + len - TAILLEN, tailstr, TAILLEN) != 0); | |
775 | linebuf[len - TAILLEN] = '\0'; | |
776 | len = len - BEGINLEN - TAILLEN + 1; | |
777 | *name = pem_malloc(len, flags); | |
778 | if (*name == NULL) { | |
9311d0c4 | 779 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
204afd81 BK |
780 | goto err; |
781 | } | |
782 | memcpy(*name, linebuf + BEGINLEN, len); | |
783 | ret = 1; | |
784 | ||
785 | err: | |
2ca8bbe5 | 786 | pem_free(linebuf, flags, LINESIZE + 1); |
204afd81 BK |
787 | return ret; |
788 | } | |
789 | ||
790 | /* Keep track of how much of a header we've seen. */ | |
791 | enum header_status { | |
792 | MAYBE_HEADER, | |
793 | IN_HEADER, | |
794 | POST_HEADER | |
795 | }; | |
796 | ||
797 | /** | |
798 | * Extract the optional PEM header, with details on the type of content and | |
799 | * any encryption used on the contents, and the bulk of the data from the bio. | |
800 | * The end of the header is marked by a blank line; if the end-of-input marker | |
801 | * is reached prior to a blank line, there is no header. | |
802 | * | |
803 | * The header and data arguments are BIO** since we may have to swap them | |
804 | * if there is no header, for efficiency. | |
805 | * | |
806 | * We need the name of the PEM-encoded type to verify the end string. | |
807 | */ | |
808 | static int get_header_and_data(BIO *bp, BIO **header, BIO **data, char *name, | |
809 | unsigned int flags) | |
810 | { | |
811 | BIO *tmp = *header; | |
812 | char *linebuf, *p; | |
0324ffc5 | 813 | int len, line, ret = 0, end = 0, prev_partial_line_read = 0, partial_line_read = 0; |
204afd81 BK |
814 | /* 0 if not seen (yet), 1 if reading header, 2 if finished header */ |
815 | enum header_status got_header = MAYBE_HEADER; | |
816 | unsigned int flags_mask; | |
817 | size_t namelen; | |
818 | ||
819 | /* Need to hold trailing NUL (accounted for by BIO_gets() and the newline | |
820 | * that will be added by sanitize_line() (the extra '1'). */ | |
821 | linebuf = pem_malloc(LINESIZE + 1, flags); | |
822 | if (linebuf == NULL) { | |
9311d0c4 | 823 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
204afd81 BK |
824 | return 0; |
825 | } | |
0f113f3e | 826 | |
204afd81 BK |
827 | for (line = 0; ; line++) { |
828 | flags_mask = ~0u; | |
829 | len = BIO_gets(bp, linebuf, LINESIZE); | |
830 | if (len <= 0) { | |
9311d0c4 | 831 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); |
204afd81 BK |
832 | goto err; |
833 | } | |
0f113f3e | 834 | |
0324ffc5 MB |
835 | /* |
836 | * Check if line has been read completely or if only part of the line | |
837 | * has been read. Keep the previous value to ignore newlines that | |
838 | * appear due to reading a line up until the char before the newline. | |
839 | */ | |
840 | prev_partial_line_read = partial_line_read; | |
841 | partial_line_read = len == LINESIZE-1 && linebuf[LINESIZE-2] != '\n'; | |
842 | ||
204afd81 BK |
843 | if (got_header == MAYBE_HEADER) { |
844 | if (memchr(linebuf, ':', len) != NULL) | |
845 | got_header = IN_HEADER; | |
846 | } | |
847 | if (!strncmp(linebuf, endstr, ENDLEN) || got_header == IN_HEADER) | |
848 | flags_mask &= ~PEM_FLAG_ONLY_B64; | |
7c43eb5d | 849 | len = sanitize_line(linebuf, len, flags & flags_mask, 0); |
204afd81 BK |
850 | |
851 | /* Check for end of header. */ | |
852 | if (linebuf[0] == '\n') { | |
0324ffc5 MB |
853 | /* |
854 | * If previous line has been read only partially this newline is a | |
855 | * regular newline at the end of a line and not an empty line. | |
856 | */ | |
857 | if (!prev_partial_line_read) { | |
858 | if (got_header == POST_HEADER) { | |
859 | /* Another blank line is an error. */ | |
9311d0c4 | 860 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); |
0324ffc5 MB |
861 | goto err; |
862 | } | |
863 | got_header = POST_HEADER; | |
864 | tmp = *data; | |
0f113f3e | 865 | } |
204afd81 | 866 | continue; |
0f113f3e | 867 | } |
0f113f3e | 868 | |
204afd81 BK |
869 | /* Check for end of stream (which means there is no header). */ |
870 | if (strncmp(linebuf, endstr, ENDLEN) == 0) { | |
871 | p = linebuf + ENDLEN; | |
872 | namelen = strlen(name); | |
873 | if (strncmp(p, name, namelen) != 0 || | |
874 | strncmp(p + namelen, tailstr, TAILLEN) != 0) { | |
9311d0c4 | 875 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); |
204afd81 BK |
876 | goto err; |
877 | } | |
878 | if (got_header == MAYBE_HEADER) { | |
879 | *header = *data; | |
880 | *data = tmp; | |
881 | } | |
0f113f3e | 882 | break; |
204afd81 BK |
883 | } else if (end) { |
884 | /* Malformed input; short line not at end of data. */ | |
9311d0c4 | 885 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_END_LINE); |
0f113f3e MC |
886 | goto err; |
887 | } | |
204afd81 BK |
888 | /* |
889 | * Else, a line of text -- could be header or data; we don't | |
890 | * know yet. Just pass it through. | |
891 | */ | |
aa8dfbc4 BE |
892 | if (BIO_puts(tmp, linebuf) < 0) |
893 | goto err; | |
204afd81 BK |
894 | /* |
895 | * Only encrypted files need the line length check applied. | |
896 | */ | |
897 | if (got_header == POST_HEADER) { | |
898 | /* 65 includes the trailing newline */ | |
899 | if (len > 65) | |
900 | goto err; | |
901 | if (len < 65) | |
902 | end = 1; | |
0f113f3e | 903 | } |
0f113f3e | 904 | } |
0f113f3e | 905 | |
204afd81 BK |
906 | ret = 1; |
907 | err: | |
2ca8bbe5 | 908 | pem_free(linebuf, flags, LINESIZE + 1); |
204afd81 BK |
909 | return ret; |
910 | } | |
0f113f3e | 911 | |
204afd81 BK |
912 | /** |
913 | * Read in PEM-formatted data from the given BIO. | |
914 | * | |
915 | * By nature of the PEM format, all content must be printable ASCII (except | |
a7eeefea | 916 | * for line endings). Other characters are malformed input and will be rejected. |
204afd81 BK |
917 | */ |
918 | int PEM_read_bio_ex(BIO *bp, char **name_out, char **header, | |
919 | unsigned char **data, long *len_out, unsigned int flags) | |
920 | { | |
a07dc816 | 921 | EVP_ENCODE_CTX *ctx = NULL; |
204afd81 BK |
922 | const BIO_METHOD *bmeth; |
923 | BIO *headerB = NULL, *dataB = NULL; | |
924 | char *name = NULL; | |
925 | int len, taillen, headerlen, ret = 0; | |
926 | BUF_MEM * buf_mem; | |
0f113f3e | 927 | |
204afd81 BK |
928 | *len_out = 0; |
929 | *name_out = *header = NULL; | |
930 | *data = NULL; | |
931 | if ((flags & PEM_FLAG_EAY_COMPATIBLE) && (flags & PEM_FLAG_ONLY_B64)) { | |
932 | /* These two are mutually incompatible; bail out. */ | |
9311d0c4 | 933 | ERR_raise(ERR_LIB_PEM, ERR_R_PASSED_INVALID_ARGUMENT); |
204afd81 | 934 | goto end; |
0f113f3e | 935 | } |
204afd81 BK |
936 | bmeth = (flags & PEM_FLAG_SECURE) ? BIO_s_secmem() : BIO_s_mem(); |
937 | ||
938 | headerB = BIO_new(bmeth); | |
939 | dataB = BIO_new(bmeth); | |
940 | if (headerB == NULL || dataB == NULL) { | |
9311d0c4 | 941 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); |
204afd81 | 942 | goto end; |
0f113f3e | 943 | } |
0f113f3e | 944 | |
204afd81 BK |
945 | if (!get_name(bp, &name, flags)) |
946 | goto end; | |
947 | if (!get_header_and_data(bp, &headerB, &dataB, name, flags)) | |
948 | goto end; | |
949 | ||
204afd81 BK |
950 | BIO_get_mem_ptr(dataB, &buf_mem); |
951 | len = buf_mem->length; | |
a07dc816 MC |
952 | |
953 | /* There was no data in the PEM file */ | |
954 | if (len == 0) | |
955 | goto end; | |
956 | ||
957 | ctx = EVP_ENCODE_CTX_new(); | |
958 | if (ctx == NULL) { | |
959 | ERR_raise(ERR_LIB_PEM, ERR_R_MALLOC_FAILURE); | |
960 | goto end; | |
961 | } | |
962 | ||
963 | EVP_DecodeInit(ctx); | |
204afd81 BK |
964 | if (EVP_DecodeUpdate(ctx, (unsigned char*)buf_mem->data, &len, |
965 | (unsigned char*)buf_mem->data, len) < 0 | |
966 | || EVP_DecodeFinal(ctx, (unsigned char*)&(buf_mem->data[len]), | |
967 | &taillen) < 0) { | |
9311d0c4 | 968 | ERR_raise(ERR_LIB_PEM, PEM_R_BAD_BASE64_DECODE); |
204afd81 BK |
969 | goto end; |
970 | } | |
971 | len += taillen; | |
972 | buf_mem->length = len; | |
973 | ||
204afd81 BK |
974 | headerlen = BIO_get_mem_data(headerB, NULL); |
975 | *header = pem_malloc(headerlen + 1, flags); | |
976 | *data = pem_malloc(len, flags); | |
977 | if (*header == NULL || *data == NULL) { | |
2ca8bbe5 BE |
978 | pem_free(*header, flags, 0); |
979 | pem_free(*data, flags, 0); | |
204afd81 BK |
980 | goto end; |
981 | } | |
982 | BIO_read(headerB, *header, headerlen); | |
983 | (*header)[headerlen] = '\0'; | |
984 | BIO_read(dataB, *data, len); | |
985 | *len_out = len; | |
986 | *name_out = name; | |
987 | name = NULL; | |
988 | ret = 1; | |
989 | ||
990 | end: | |
601ab315 | 991 | EVP_ENCODE_CTX_free(ctx); |
2ca8bbe5 | 992 | pem_free(name, flags, 0); |
204afd81 BK |
993 | BIO_free(headerB); |
994 | BIO_free(dataB); | |
995 | return ret; | |
996 | } | |
997 | ||
998 | int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data, | |
999 | long *len) | |
1000 | { | |
1001 | return PEM_read_bio_ex(bp, name, header, data, len, PEM_FLAG_EAY_COMPATIBLE); | |
0f113f3e MC |
1002 | } |
1003 | ||
1004 | /* | |
1005 | * Check pem string and return prefix length. If for example the pem_str == | |
1006 | * "RSA PRIVATE KEY" and suffix = "PRIVATE KEY" the return value is 3 for the | |
1007 | * string "RSA". | |
d82e2718 DSH |
1008 | */ |
1009 | ||
b78c0166 | 1010 | int ossl_pem_check_suffix(const char *pem_str, const char *suffix) |
0f113f3e MC |
1011 | { |
1012 | int pem_len = strlen(pem_str); | |
1013 | int suffix_len = strlen(suffix); | |
1014 | const char *p; | |
1015 | if (suffix_len + 1 >= pem_len) | |
1016 | return 0; | |
1017 | p = pem_str + pem_len - suffix_len; | |
1018 | if (strcmp(p, suffix)) | |
1019 | return 0; | |
1020 | p--; | |
1021 | if (*p != ' ') | |
1022 | return 0; | |
1023 | return p - pem_str; | |
1024 | } |