1 /* crypto/pem/pem_info.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <openssl/pem.h>
60
61 #include <assert.h>
62 #include <stdio.h>
63 #include <string.h>
64
65 #include <openssl/dsa.h>
66 #include <openssl/err.h>
67 #include <openssl/evp.h>
68 #include <openssl/mem.h>
69 #include <openssl/obj.h>
70 #include <openssl/rsa.h>
71 #include <openssl/x509.h>
72
73 #ifndef OPENSSL_NO_FP_API
STACK_OF(X509_INFO)74 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
75 pem_password_cb *cb, void *u)
76 {
77 BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
78 if (b == NULL) {
79 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
80 return 0;
81 }
82 STACK_OF(X509_INFO) *ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
83 BIO_free(b);
84 return ret;
85 }
86 #endif
87
88 enum parse_result_t {
89 parse_ok,
90 parse_error,
91 parse_new_entry,
92 };
93
parse_x509(X509_INFO * info,const uint8_t * data,size_t len,int key_type)94 static enum parse_result_t parse_x509(X509_INFO *info, const uint8_t *data,
95 size_t len, int key_type)
96 {
97 if (info->x509 != NULL) {
98 return parse_new_entry;
99 }
100 info->x509 = d2i_X509(NULL, &data, len);
101 return info->x509 != NULL ? parse_ok : parse_error;
102 }
103
parse_x509_aux(X509_INFO * info,const uint8_t * data,size_t len,int key_type)104 static enum parse_result_t parse_x509_aux(X509_INFO *info, const uint8_t *data,
105 size_t len, int key_type)
106 {
107 if (info->x509 != NULL) {
108 return parse_new_entry;
109 }
110 info->x509 = d2i_X509_AUX(NULL, &data, len);
111 return info->x509 != NULL ? parse_ok : parse_error;
112 }
113
parse_crl(X509_INFO * info,const uint8_t * data,size_t len,int key_type)114 static enum parse_result_t parse_crl(X509_INFO *info, const uint8_t *data,
115 size_t len, int key_type)
116 {
117 if (info->crl != NULL) {
118 return parse_new_entry;
119 }
120 info->crl = d2i_X509_CRL(NULL, &data, len);
121 return info->crl != NULL ? parse_ok : parse_error;
122 }
123
parse_key(X509_INFO * info,const uint8_t * data,size_t len,int key_type)124 static enum parse_result_t parse_key(X509_INFO *info, const uint8_t *data,
125 size_t len, int key_type)
126 {
127 if (info->x_pkey != NULL) {
128 return parse_new_entry;
129 }
130 info->x_pkey = X509_PKEY_new();
131 if (info->x_pkey == NULL) {
132 return parse_error;
133 }
134 info->x_pkey->dec_pkey = d2i_PrivateKey(key_type, NULL, &data, len);
135 return info->x_pkey->dec_pkey != NULL ? parse_ok : parse_error;
136 }
137
STACK_OF(X509_INFO)138 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
139 pem_password_cb *cb, void *u)
140 {
141 X509_INFO *info = NULL;
142 char *name = NULL, *header = NULL;
143 unsigned char *data = NULL;
144 long len;
145 int ok = 0;
146 STACK_OF(X509_INFO) *ret = NULL;
147
148 if (sk == NULL) {
149 ret = sk_X509_INFO_new_null();
150 if (ret == NULL) {
151 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
152 return NULL;
153 }
154 } else {
155 ret = sk;
156 }
157 size_t orig_num = sk_X509_INFO_num(ret);
158
159 info = X509_INFO_new();
160 if (info == NULL) {
161 goto err;
162 }
163
164 for (;;) {
165 if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
166 uint32_t error = ERR_peek_last_error();
167 if (ERR_GET_LIB(error) == ERR_LIB_PEM &&
168 ERR_GET_REASON(error) == PEM_R_NO_START_LINE) {
169 ERR_clear_error();
170 break;
171 }
172 goto err;
173 }
174
175 enum parse_result_t (*parse_function)(X509_INFO *, const uint8_t *,
176 size_t, int) = NULL;
177 int key_type = EVP_PKEY_NONE;
178 if (strcmp(name, PEM_STRING_X509) == 0 ||
179 strcmp(name, PEM_STRING_X509_OLD) == 0) {
180 parse_function = parse_x509;
181 } else if (strcmp(name, PEM_STRING_X509_TRUSTED) == 0) {
182 parse_function = parse_x509_aux;
183 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
184 parse_function = parse_crl;
185 } else if (strcmp(name, PEM_STRING_RSA) == 0) {
186 parse_function = parse_key;
187 key_type = EVP_PKEY_RSA;
188 } else if (strcmp(name, PEM_STRING_DSA) == 0) {
189 parse_function = parse_key;
190 key_type = EVP_PKEY_DSA;
191 } else if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
192 parse_function = parse_key;
193 key_type = EVP_PKEY_EC;
194 }
195
196 /* If a private key has a header, assume it is encrypted. */
197 if (key_type != EVP_PKEY_NONE && strlen(header) > 10) {
198 if (info->x_pkey != NULL) {
199 if (!sk_X509_INFO_push(ret, info)) {
200 goto err;
201 }
202 info = X509_INFO_new();
203 if (info == NULL) {
204 goto err;
205 }
206 }
207 /* Historically, raw entries pushed an empty key. */
208 info->x_pkey = X509_PKEY_new();
209 if (info->x_pkey == NULL ||
210 !PEM_get_EVP_CIPHER_INFO(header, &info->enc_cipher)) {
211 goto err;
212 }
213 info->enc_data = (char *)data;
214 info->enc_len = (int)len;
215 data = NULL;
216 } else if (parse_function != NULL) {
217 EVP_CIPHER_INFO cipher;
218 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher) ||
219 !PEM_do_header(&cipher, data, &len, cb, u)) {
220 goto err;
221 }
222 enum parse_result_t result =
223 parse_function(info, data, len, key_type);
224 if (result == parse_new_entry) {
225 if (!sk_X509_INFO_push(ret, info)) {
226 goto err;
227 }
228 info = X509_INFO_new();
229 if (info == NULL) {
230 goto err;
231 }
232 result = parse_function(info, data, len, key_type);
233 }
234 if (result != parse_ok) {
235 OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
236 goto err;
237 }
238 }
239 OPENSSL_free(name);
240 OPENSSL_free(header);
241 OPENSSL_free(data);
242 name = NULL;
243 header = NULL;
244 data = NULL;
245 }
246
247 /* Push the last entry on the stack if not empty. */
248 if (info->x509 != NULL || info->crl != NULL ||
249 info->x_pkey != NULL || info->enc_data != NULL) {
250 if (!sk_X509_INFO_push(ret, info)) {
251 goto err;
252 }
253 info = NULL;
254 }
255
256 ok = 1;
257
258 err:
259 X509_INFO_free(info);
260 if (!ok) {
261 while (sk_X509_INFO_num(ret) > orig_num) {
262 X509_INFO_free(sk_X509_INFO_pop(ret));
263 }
264 if (ret != sk) {
265 sk_X509_INFO_free(ret);
266 }
267 ret = NULL;
268 }
269
270 OPENSSL_free(name);
271 OPENSSL_free(header);
272 OPENSSL_free(data);
273 return ret;
274 }
275
276 /* A TJH addition */
PEM_X509_INFO_write_bio(BIO * bp,X509_INFO * xi,EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)277 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
278 unsigned char *kstr, int klen,
279 pem_password_cb *cb, void *u)
280 {
281 int i, ret = 0;
282 unsigned char *data = NULL;
283 const char *objstr = NULL;
284 char buf[PEM_BUFSIZE];
285 unsigned char *iv = NULL;
286 unsigned iv_len = 0;
287
288 if (enc != NULL) {
289 iv_len = EVP_CIPHER_iv_length(enc);
290 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
291 if (objstr == NULL) {
292 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
293 goto err;
294 }
295 }
296
297 /*
298 * now for the fun part ... if we have a private key then we have to be
299 * able to handle a not-yet-decrypted key being written out correctly ...
300 * if it is decrypted or it is non-encrypted then we use the base code
301 */
302 if (xi->x_pkey != NULL) {
303 if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
304 if (enc == NULL) {
305 OPENSSL_PUT_ERROR(PEM, PEM_R_CIPHER_IS_NULL);
306 goto err;
307 }
308
309 /* copy from weirdo names into more normal things */
310 iv = xi->enc_cipher.iv;
311 data = (unsigned char *)xi->enc_data;
312 i = xi->enc_len;
313
314 /*
315 * we take the encryption data from the internal stuff rather
316 * than what the user has passed us ... as we have to match
317 * exactly for some strange reason
318 */
319 objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
320 if (objstr == NULL) {
321 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
322 goto err;
323 }
324
325 /* create the right magic header stuff */
326 assert(strlen(objstr) + 23 + 2 * iv_len + 13 <= sizeof buf);
327 buf[0] = '\0';
328 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
329 PEM_dek_info(buf, objstr, iv_len, (char *)iv);
330
331 /* use the normal code to write things out */
332 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
333 if (i <= 0)
334 goto err;
335 } else {
336 /* Add DSA/DH */
337 /* normal optionally encrypted stuff */
338 if (PEM_write_bio_RSAPrivateKey(bp,
339 xi->x_pkey->dec_pkey->pkey.rsa,
340 enc, kstr, klen, cb, u) <= 0)
341 goto err;
342 }
343 }
344
345 /* if we have a certificate then write it out now */
346 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
347 goto err;
348
349 /*
350 * we are ignoring anything else that is loaded into the X509_INFO
351 * structure for the moment ... as I don't need it so I'm not coding it
352 * here and Eric can do it when this makes it into the base library --tjh
353 */
354
355 ret = 1;
356
357 err:
358 OPENSSL_cleanse(buf, PEM_BUFSIZE);
359 return ret;
360 }
361