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
STACK_OF(X509_INFO)73 STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
74 pem_password_cb *cb, void *u)
75 {
76 BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
77 if (b == NULL) {
78 OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
79 return 0;
80 }
81 STACK_OF(X509_INFO) *ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
82 BIO_free(b);
83 return ret;
84 }
85
86 enum parse_result_t {
87 parse_ok,
88 parse_error,
89 parse_new_entry,
90 };
91
parse_x509(X509_INFO * info,const uint8_t * data,size_t len,int key_type)92 static enum parse_result_t parse_x509(X509_INFO *info, const uint8_t *data,
93 size_t len, int key_type)
94 {
95 if (info->x509 != NULL) {
96 return parse_new_entry;
97 }
98 info->x509 = d2i_X509(NULL, &data, len);
99 return info->x509 != NULL ? parse_ok : parse_error;
100 }
101
parse_x509_aux(X509_INFO * info,const uint8_t * data,size_t len,int key_type)102 static enum parse_result_t parse_x509_aux(X509_INFO *info, const uint8_t *data,
103 size_t len, int key_type)
104 {
105 if (info->x509 != NULL) {
106 return parse_new_entry;
107 }
108 info->x509 = d2i_X509_AUX(NULL, &data, len);
109 return info->x509 != NULL ? parse_ok : parse_error;
110 }
111
parse_crl(X509_INFO * info,const uint8_t * data,size_t len,int key_type)112 static enum parse_result_t parse_crl(X509_INFO *info, const uint8_t *data,
113 size_t len, int key_type)
114 {
115 if (info->crl != NULL) {
116 return parse_new_entry;
117 }
118 info->crl = d2i_X509_CRL(NULL, &data, len);
119 return info->crl != NULL ? parse_ok : parse_error;
120 }
121
parse_key(X509_INFO * info,const uint8_t * data,size_t len,int key_type)122 static enum parse_result_t parse_key(X509_INFO *info, const uint8_t *data,
123 size_t len, int key_type)
124 {
125 if (info->x_pkey != NULL) {
126 return parse_new_entry;
127 }
128 info->x_pkey = X509_PKEY_new();
129 if (info->x_pkey == NULL) {
130 return parse_error;
131 }
132 info->x_pkey->dec_pkey = d2i_PrivateKey(key_type, NULL, &data, len);
133 return info->x_pkey->dec_pkey != NULL ? parse_ok : parse_error;
134 }
135
STACK_OF(X509_INFO)136 STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
137 pem_password_cb *cb, void *u)
138 {
139 X509_INFO *info = NULL;
140 char *name = NULL, *header = NULL;
141 unsigned char *data = NULL;
142 long len;
143 int ok = 0;
144 STACK_OF(X509_INFO) *ret = NULL;
145
146 if (sk == NULL) {
147 ret = sk_X509_INFO_new_null();
148 if (ret == NULL) {
149 OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
150 return NULL;
151 }
152 } else {
153 ret = sk;
154 }
155 size_t orig_num = sk_X509_INFO_num(ret);
156
157 info = X509_INFO_new();
158 if (info == NULL) {
159 goto err;
160 }
161
162 for (;;) {
163 if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
164 uint32_t error = ERR_peek_last_error();
165 if (ERR_GET_LIB(error) == ERR_LIB_PEM &&
166 ERR_GET_REASON(error) == PEM_R_NO_START_LINE) {
167 ERR_clear_error();
168 break;
169 }
170 goto err;
171 }
172
173 enum parse_result_t (*parse_function)(X509_INFO *, const uint8_t *,
174 size_t, int) = NULL;
175 int key_type = EVP_PKEY_NONE;
176 if (strcmp(name, PEM_STRING_X509) == 0 ||
177 strcmp(name, PEM_STRING_X509_OLD) == 0) {
178 parse_function = parse_x509;
179 } else if (strcmp(name, PEM_STRING_X509_TRUSTED) == 0) {
180 parse_function = parse_x509_aux;
181 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
182 parse_function = parse_crl;
183 } else if (strcmp(name, PEM_STRING_RSA) == 0) {
184 parse_function = parse_key;
185 key_type = EVP_PKEY_RSA;
186 } else if (strcmp(name, PEM_STRING_DSA) == 0) {
187 parse_function = parse_key;
188 key_type = EVP_PKEY_DSA;
189 } else if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
190 parse_function = parse_key;
191 key_type = EVP_PKEY_EC;
192 }
193
194 /* If a private key has a header, assume it is encrypted. */
195 if (key_type != EVP_PKEY_NONE && strlen(header) > 10) {
196 if (info->x_pkey != NULL) {
197 if (!sk_X509_INFO_push(ret, info)) {
198 goto err;
199 }
200 info = X509_INFO_new();
201 if (info == NULL) {
202 goto err;
203 }
204 }
205 /* Historically, raw entries pushed an empty key. */
206 info->x_pkey = X509_PKEY_new();
207 if (info->x_pkey == NULL ||
208 !PEM_get_EVP_CIPHER_INFO(header, &info->enc_cipher)) {
209 goto err;
210 }
211 info->enc_data = (char *)data;
212 info->enc_len = (int)len;
213 data = NULL;
214 } else if (parse_function != NULL) {
215 EVP_CIPHER_INFO cipher;
216 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher) ||
217 !PEM_do_header(&cipher, data, &len, cb, u)) {
218 goto err;
219 }
220 enum parse_result_t result =
221 parse_function(info, data, len, key_type);
222 if (result == parse_new_entry) {
223 if (!sk_X509_INFO_push(ret, info)) {
224 goto err;
225 }
226 info = X509_INFO_new();
227 if (info == NULL) {
228 goto err;
229 }
230 result = parse_function(info, data, len, key_type);
231 }
232 if (result != parse_ok) {
233 OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
234 goto err;
235 }
236 }
237 OPENSSL_free(name);
238 OPENSSL_free(header);
239 OPENSSL_free(data);
240 name = NULL;
241 header = NULL;
242 data = NULL;
243 }
244
245 /* Push the last entry on the stack if not empty. */
246 if (info->x509 != NULL || info->crl != NULL ||
247 info->x_pkey != NULL || info->enc_data != NULL) {
248 if (!sk_X509_INFO_push(ret, info)) {
249 goto err;
250 }
251 info = NULL;
252 }
253
254 ok = 1;
255
256 err:
257 X509_INFO_free(info);
258 if (!ok) {
259 while (sk_X509_INFO_num(ret) > orig_num) {
260 X509_INFO_free(sk_X509_INFO_pop(ret));
261 }
262 if (ret != sk) {
263 sk_X509_INFO_free(ret);
264 }
265 ret = NULL;
266 }
267
268 OPENSSL_free(name);
269 OPENSSL_free(header);
270 OPENSSL_free(data);
271 return ret;
272 }
273
274 /* 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)275 int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
276 unsigned char *kstr, int klen,
277 pem_password_cb *cb, void *u)
278 {
279 int i, ret = 0;
280 unsigned char *data = NULL;
281 const char *objstr = NULL;
282 char buf[PEM_BUFSIZE];
283 unsigned char *iv = NULL;
284 unsigned iv_len = 0;
285
286 if (enc != NULL) {
287 iv_len = EVP_CIPHER_iv_length(enc);
288 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
289 if (objstr == NULL) {
290 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
291 goto err;
292 }
293 }
294
295 /*
296 * now for the fun part ... if we have a private key then we have to be
297 * able to handle a not-yet-decrypted key being written out correctly ...
298 * if it is decrypted or it is non-encrypted then we use the base code
299 */
300 if (xi->x_pkey != NULL) {
301 if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
302 if (enc == NULL) {
303 OPENSSL_PUT_ERROR(PEM, PEM_R_CIPHER_IS_NULL);
304 goto err;
305 }
306
307 /* copy from weirdo names into more normal things */
308 iv = xi->enc_cipher.iv;
309 data = (unsigned char *)xi->enc_data;
310 i = xi->enc_len;
311
312 /*
313 * we take the encryption data from the internal stuff rather
314 * than what the user has passed us ... as we have to match
315 * exactly for some strange reason
316 */
317 objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
318 if (objstr == NULL) {
319 OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
320 goto err;
321 }
322
323 /* create the right magic header stuff */
324 assert(strlen(objstr) + 23 + 2 * iv_len + 13 <= sizeof buf);
325 buf[0] = '\0';
326 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
327 PEM_dek_info(buf, objstr, iv_len, (char *)iv);
328
329 /* use the normal code to write things out */
330 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
331 if (i <= 0)
332 goto err;
333 } else {
334 /* Add DSA/DH */
335 /* normal optionally encrypted stuff */
336 if (PEM_write_bio_RSAPrivateKey(bp,
337 xi->x_pkey->dec_pkey->pkey.rsa,
338 enc, kstr, klen, cb, u) <= 0)
339 goto err;
340 }
341 }
342
343 /* if we have a certificate then write it out now */
344 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
345 goto err;
346
347 /*
348 * we are ignoring anything else that is loaded into the X509_INFO
349 * structure for the moment ... as I don't need it so I'm not coding it
350 * here and Eric can do it when this makes it into the base library --tjh
351 */
352
353 ret = 1;
354
355 err:
356 OPENSSL_cleanse(buf, PEM_BUFSIZE);
357 return ret;
358 }
359