1 /* Copyright (C) 1995-1998 Eric Young ([email protected])
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young ([email protected]).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson ([email protected]).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young ([email protected])"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson ([email protected])"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
56 */
57
58 #include <openssl/pem.h>
59
60 #include <assert.h>
61 #include <stdio.h>
62 #include <string.h>
63
64 #include <openssl/dsa.h>
65 #include <openssl/err.h>
66 #include <openssl/evp.h>
67 #include <openssl/mem.h>
68 #include <openssl/obj.h>
69 #include <openssl/rsa.h>
70 #include <openssl/x509.h>
71
72
X509_PKEY_new(void)73 static X509_PKEY *X509_PKEY_new(void) {
74 return OPENSSL_zalloc(sizeof(X509_PKEY));
75 }
76
X509_PKEY_free(X509_PKEY * x)77 static void X509_PKEY_free(X509_PKEY *x) {
78 if (x == NULL) {
79 return;
80 }
81
82 EVP_PKEY_free(x->dec_pkey);
83 OPENSSL_free(x);
84 }
85
X509_INFO_new(void)86 static X509_INFO *X509_INFO_new(void) {
87 return OPENSSL_zalloc(sizeof(X509_INFO));
88 }
89
X509_INFO_free(X509_INFO * x)90 void X509_INFO_free(X509_INFO *x) {
91 if (x == NULL) {
92 return;
93 }
94
95 X509_free(x->x509);
96 X509_CRL_free(x->crl);
97 X509_PKEY_free(x->x_pkey);
98 OPENSSL_free(x->enc_data);
99 OPENSSL_free(x);
100 }
101
102
STACK_OF(X509_INFO)103 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
104 pem_password_cb *cb, void *u) {
105 BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
106 if (b == NULL) {
107 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
108 return 0;
109 }
110 STACK_OF(X509_INFO) *ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
111 BIO_free(b);
112 return ret;
113 }
114
115 enum parse_result_t {
116 parse_ok,
117 parse_error,
118 parse_new_entry,
119 };
120
parse_x509(X509_INFO * info,const uint8_t * data,size_t len,int key_type)121 static enum parse_result_t parse_x509(X509_INFO *info, const uint8_t *data,
122 size_t len, int key_type) {
123 if (info->x509 != NULL) {
124 return parse_new_entry;
125 }
126 info->x509 = d2i_X509(NULL, &data, len);
127 return info->x509 != NULL ? parse_ok : parse_error;
128 }
129
parse_x509_aux(X509_INFO * info,const uint8_t * data,size_t len,int key_type)130 static enum parse_result_t parse_x509_aux(X509_INFO *info, const uint8_t *data,
131 size_t len, int key_type) {
132 if (info->x509 != NULL) {
133 return parse_new_entry;
134 }
135 info->x509 = d2i_X509_AUX(NULL, &data, len);
136 return info->x509 != NULL ? parse_ok : parse_error;
137 }
138
parse_crl(X509_INFO * info,const uint8_t * data,size_t len,int key_type)139 static enum parse_result_t parse_crl(X509_INFO *info, const uint8_t *data,
140 size_t len, int key_type) {
141 if (info->crl != NULL) {
142 return parse_new_entry;
143 }
144 info->crl = d2i_X509_CRL(NULL, &data, len);
145 return info->crl != NULL ? parse_ok : parse_error;
146 }
147
parse_key(X509_INFO * info,const uint8_t * data,size_t len,int key_type)148 static enum parse_result_t parse_key(X509_INFO *info, const uint8_t *data,
149 size_t len, int key_type) {
150 if (info->x_pkey != NULL) {
151 return parse_new_entry;
152 }
153 info->x_pkey = X509_PKEY_new();
154 if (info->x_pkey == NULL) {
155 return parse_error;
156 }
157 info->x_pkey->dec_pkey = d2i_PrivateKey(key_type, NULL, &data, len);
158 return info->x_pkey->dec_pkey != NULL ? parse_ok : parse_error;
159 }
160
STACK_OF(X509_INFO)161 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
162 pem_password_cb *cb, void *u) {
163 X509_INFO *info = NULL;
164 char *name = NULL, *header = NULL;
165 unsigned char *data = NULL;
166 long len;
167 int ok = 0;
168 STACK_OF(X509_INFO) *ret = NULL;
169
170 if (sk == NULL) {
171 ret = sk_X509_INFO_new_null();
172 if (ret == NULL) {
173 return NULL;
174 }
175 } else {
176 ret = sk;
177 }
178 size_t orig_num = sk_X509_INFO_num(ret);
179
180 info = X509_INFO_new();
181 if (info == NULL) {
182 goto err;
183 }
184
185 for (;;) {
186 if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
187 uint32_t error = ERR_peek_last_error();
188 if (ERR_GET_LIB(error) == ERR_LIB_PEM &&
189 ERR_GET_REASON(error) == PEM_R_NO_START_LINE) {
190 ERR_clear_error();
191 break;
192 }
193 goto err;
194 }
195
196 enum parse_result_t (*parse_function)(X509_INFO *, const uint8_t *, size_t,
197 int) = NULL;
198 int key_type = EVP_PKEY_NONE;
199 if (strcmp(name, PEM_STRING_X509) == 0 ||
200 strcmp(name, PEM_STRING_X509_OLD) == 0) {
201 parse_function = parse_x509;
202 } else if (strcmp(name, PEM_STRING_X509_TRUSTED) == 0) {
203 parse_function = parse_x509_aux;
204 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
205 parse_function = parse_crl;
206 } else if (strcmp(name, PEM_STRING_RSA) == 0) {
207 parse_function = parse_key;
208 key_type = EVP_PKEY_RSA;
209 } else if (strcmp(name, PEM_STRING_DSA) == 0) {
210 parse_function = parse_key;
211 key_type = EVP_PKEY_DSA;
212 } else if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
213 parse_function = parse_key;
214 key_type = EVP_PKEY_EC;
215 }
216
217 // If a private key has a header, assume it is encrypted.
218 if (key_type != EVP_PKEY_NONE && strlen(header) > 10) {
219 if (info->x_pkey != NULL) {
220 if (!sk_X509_INFO_push(ret, info)) {
221 goto err;
222 }
223 info = X509_INFO_new();
224 if (info == NULL) {
225 goto err;
226 }
227 }
228 // Historically, raw entries pushed an empty key.
229 info->x_pkey = X509_PKEY_new();
230 if (info->x_pkey == NULL ||
231 !PEM_get_EVP_CIPHER_INFO(header, &info->enc_cipher)) {
232 goto err;
233 }
234 info->enc_data = (char *)data;
235 info->enc_len = (int)len;
236 data = NULL;
237 } else if (parse_function != NULL) {
238 EVP_CIPHER_INFO cipher;
239 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher) ||
240 !PEM_do_header(&cipher, data, &len, cb, u)) {
241 goto err;
242 }
243 enum parse_result_t result = parse_function(info, data, len, key_type);
244 if (result == parse_new_entry) {
245 if (!sk_X509_INFO_push(ret, info)) {
246 goto err;
247 }
248 info = X509_INFO_new();
249 if (info == NULL) {
250 goto err;
251 }
252 result = parse_function(info, data, len, key_type);
253 }
254 if (result != parse_ok) {
255 OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
256 goto err;
257 }
258 }
259 OPENSSL_free(name);
260 OPENSSL_free(header);
261 OPENSSL_free(data);
262 name = NULL;
263 header = NULL;
264 data = NULL;
265 }
266
267 // Push the last entry on the stack if not empty.
268 if (info->x509 != NULL || info->crl != NULL || info->x_pkey != NULL ||
269 info->enc_data != NULL) {
270 if (!sk_X509_INFO_push(ret, info)) {
271 goto err;
272 }
273 info = NULL;
274 }
275
276 ok = 1;
277
278 err:
279 X509_INFO_free(info);
280 if (!ok) {
281 while (sk_X509_INFO_num(ret) > orig_num) {
282 X509_INFO_free(sk_X509_INFO_pop(ret));
283 }
284 if (ret != sk) {
285 sk_X509_INFO_free(ret);
286 }
287 ret = NULL;
288 }
289
290 OPENSSL_free(name);
291 OPENSSL_free(header);
292 OPENSSL_free(data);
293 return ret;
294 }
295