1 /* $OpenBSD: pem_info.c,v 1.25 2021/12/12 21:30:14 tb Exp $ */
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 <stdio.h>
60 #include <string.h>
61
62 #include <openssl/opensslconf.h>
63
64 #include <openssl/buffer.h>
65 #include <openssl/err.h>
66 #include <openssl/evp.h>
67 #include <openssl/objects.h>
68 #include <openssl/pem.h>
69 #include <openssl/x509.h>
70
71 #ifndef OPENSSL_NO_DSA
72 #include <openssl/dsa.h>
73 #endif
74 #ifndef OPENSSL_NO_RSA
75 #include <openssl/rsa.h>
76 #endif
77
78 #include "evp_locl.h"
79
STACK_OF(X509_INFO)80 STACK_OF(X509_INFO) *
81 PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb,
82 void *u)
83 {
84 BIO *b;
85 STACK_OF(X509_INFO) *ret;
86
87 if ((b = BIO_new(BIO_s_file())) == NULL) {
88 PEMerror(ERR_R_BUF_LIB);
89 return (0);
90 }
91 BIO_set_fp(b, fp, BIO_NOCLOSE);
92 ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
93 BIO_free(b);
94 return (ret);
95 }
96
STACK_OF(X509_INFO)97 STACK_OF(X509_INFO) *
98 PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb,
99 void *u)
100 {
101 X509_INFO *xi = NULL;
102 char *name = NULL, *header = NULL;
103 void *pp;
104 unsigned char *data = NULL;
105 const unsigned char *p;
106 long len;
107 int ok = 0;
108 int num_in, ptype, raw;
109 STACK_OF(X509_INFO) *ret = sk;
110 d2i_of_void *d2i = NULL;
111
112 if (ret == NULL) {
113 if ((ret = sk_X509_INFO_new_null()) == NULL) {
114 PEMerror(ERR_R_MALLOC_FAILURE);
115 return NULL;
116 }
117 }
118 num_in = sk_X509_INFO_num(ret);
119
120 if ((xi = X509_INFO_new()) == NULL)
121 goto err;
122 for (;;) {
123 raw = 0;
124 ptype = 0;
125 if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
126 if (ERR_GET_REASON(ERR_peek_last_error()) ==
127 PEM_R_NO_START_LINE) {
128 ERR_clear_error();
129 break;
130 }
131 goto err;
132 }
133 if ((strcmp(name, PEM_STRING_X509) == 0) ||
134 (strcmp(name, PEM_STRING_X509_OLD) == 0)) {
135 d2i = (D2I_OF(void))d2i_X509;
136 if (xi->x509 != NULL) {
137 if (!sk_X509_INFO_push(ret, xi))
138 goto err;
139 if ((xi = X509_INFO_new()) == NULL)
140 goto err;
141 }
142 pp = &(xi->x509);
143 } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
144 d2i = (D2I_OF(void))d2i_X509_AUX;
145 if (xi->x509 != NULL) {
146 if (!sk_X509_INFO_push(ret, xi))
147 goto err;
148 if ((xi = X509_INFO_new()) == NULL)
149 goto err;
150 }
151 pp = &(xi->x509);
152 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
153 d2i = (D2I_OF(void))d2i_X509_CRL;
154 if (xi->crl != NULL) {
155 if (!sk_X509_INFO_push(ret, xi))
156 goto err;
157 if ((xi = X509_INFO_new()) == NULL)
158 goto err;
159 }
160 pp = &(xi->crl);
161 } else
162 #ifndef OPENSSL_NO_RSA
163 if (strcmp(name, PEM_STRING_RSA) == 0) {
164 d2i = (D2I_OF(void))d2i_RSAPrivateKey;
165 if (xi->x_pkey != NULL) {
166 if (!sk_X509_INFO_push(ret, xi))
167 goto err;
168 if ((xi = X509_INFO_new()) == NULL)
169 goto err;
170 }
171 xi->enc_data = NULL;
172 xi->enc_len = 0;
173 xi->x_pkey = X509_PKEY_new();
174 if (xi->x_pkey == NULL)
175 goto err;
176 ptype = EVP_PKEY_RSA;
177 pp = &xi->x_pkey->dec_pkey;
178 if (strlen(header) > 10) /* assume encrypted */
179 raw = 1;
180 } else
181 #endif
182 #ifndef OPENSSL_NO_DSA
183 if (strcmp(name, PEM_STRING_DSA) == 0) {
184 d2i = (D2I_OF(void))d2i_DSAPrivateKey;
185 if (xi->x_pkey != NULL) {
186 if (!sk_X509_INFO_push(ret, xi))
187 goto err;
188 if ((xi = X509_INFO_new()) == NULL)
189 goto err;
190 }
191 xi->enc_data = NULL;
192 xi->enc_len = 0;
193 xi->x_pkey = X509_PKEY_new();
194 if (xi->x_pkey == NULL)
195 goto err;
196 ptype = EVP_PKEY_DSA;
197 pp = &xi->x_pkey->dec_pkey;
198 if (strlen(header) > 10) /* assume encrypted */
199 raw = 1;
200 } else
201 #endif
202 #ifndef OPENSSL_NO_EC
203 if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
204 d2i = (D2I_OF(void))d2i_ECPrivateKey;
205 if (xi->x_pkey != NULL) {
206 if (!sk_X509_INFO_push(ret, xi))
207 goto err;
208 if ((xi = X509_INFO_new()) == NULL)
209 goto err;
210 }
211 xi->enc_data = NULL;
212 xi->enc_len = 0;
213 xi->x_pkey = X509_PKEY_new();
214 if (xi->x_pkey == NULL)
215 goto err;
216 ptype = EVP_PKEY_EC;
217 pp = &xi->x_pkey->dec_pkey;
218 if (strlen(header) > 10) /* assume encrypted */
219 raw = 1;
220 } else
221 #endif
222 {
223 d2i = NULL;
224 pp = NULL;
225 }
226
227 if (d2i != NULL) {
228 if (!raw) {
229 EVP_CIPHER_INFO cipher;
230
231 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
232 goto err;
233 if (!PEM_do_header(&cipher, data, &len, cb, u))
234 goto err;
235 p = data;
236 if (ptype) {
237 if (!d2i_PrivateKey(ptype, pp, &p,
238 len)) {
239 PEMerror(ERR_R_ASN1_LIB);
240 goto err;
241 }
242 } else if (d2i(pp, &p, len) == NULL) {
243 PEMerror(ERR_R_ASN1_LIB);
244 goto err;
245 }
246 } else { /* encrypted RSA data */
247 if (!PEM_get_EVP_CIPHER_INFO(header,
248 &xi->enc_cipher))
249 goto err;
250 xi->enc_data = (char *)data;
251 xi->enc_len = (int)len;
252 data = NULL;
253 }
254 } else {
255 /* unknown */
256 }
257 free(name);
258 free(header);
259 free(data);
260 name = NULL;
261 header = NULL;
262 data = NULL;
263 }
264
265 /* if the last one hasn't been pushed yet and there is anything
266 * in it then add it to the stack ...
267 */
268 if ((xi->x509 != NULL) || (xi->crl != NULL) ||
269 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
270 if (!sk_X509_INFO_push(ret, xi))
271 goto err;
272 xi = NULL;
273 }
274 ok = 1;
275
276 err:
277 if (!ok) {
278 while (sk_X509_INFO_num(ret) > num_in)
279 X509_INFO_free(sk_X509_INFO_pop(ret));
280 if (ret != sk)
281 sk_X509_INFO_free(ret);
282 ret = NULL;
283 }
284 X509_INFO_free(xi);
285 free(name);
286 free(header);
287 free(data);
288
289 return ret;
290 }
291
292
293 /* A TJH addition */
294 int
PEM_X509_INFO_write_bio(BIO * bp,X509_INFO * xi,EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)295 PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
296 unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
297 {
298 EVP_CIPHER_CTX ctx;
299 int i, ret = 0;
300 unsigned char *data = NULL;
301 const char *objstr = NULL;
302 char buf[PEM_BUFSIZE];
303 unsigned char *iv = NULL;
304
305 if (enc != NULL) {
306 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
307 if (objstr == NULL) {
308 PEMerror(PEM_R_UNSUPPORTED_CIPHER);
309 goto err;
310 }
311 }
312
313 /* now for the fun part ... if we have a private key then
314 * we have to be able to handle a not-yet-decrypted key
315 * being written out correctly ... if it is decrypted or
316 * it is non-encrypted then we use the base code
317 */
318 if (xi->x_pkey != NULL) {
319 if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) {
320 if (enc == NULL) {
321 PEMerror(PEM_R_CIPHER_IS_NULL);
322 goto err;
323 }
324
325 /* copy from weirdo names into more normal things */
326 iv = xi->enc_cipher.iv;
327 data = (unsigned char *)xi->enc_data;
328 i = xi->enc_len;
329
330 /* we take the encryption data from the
331 * internal stuff rather than what the
332 * user has passed us ... as we have to
333 * match exactly for some strange reason
334 */
335 objstr = OBJ_nid2sn(
336 EVP_CIPHER_nid(xi->enc_cipher.cipher));
337 if (objstr == NULL) {
338 PEMerror(PEM_R_UNSUPPORTED_CIPHER);
339 goto err;
340 }
341
342 /* create the right magic header stuff */
343 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 >
344 sizeof buf) {
345 PEMerror(ASN1_R_BUFFER_TOO_SMALL);
346 goto err;
347 }
348 buf[0] = '\0';
349 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
350 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
351
352 /* use the normal code to write things out */
353 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
354 if (i <= 0)
355 goto err;
356 } else {
357 /* Add DSA/DH */
358 #ifndef OPENSSL_NO_RSA
359 /* normal optionally encrypted stuff */
360 if (PEM_write_bio_RSAPrivateKey(bp,
361 xi->x_pkey->dec_pkey->pkey.rsa,
362 enc, kstr, klen, cb, u) <= 0)
363 goto err;
364 #endif
365 }
366 }
367
368 /* if we have a certificate then write it out now */
369 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
370 goto err;
371
372 /* we are ignoring anything else that is loaded into the X509_INFO
373 * structure for the moment ... as I don't need it so I'm not
374 * coding it here and Eric can do it when this makes it into the
375 * base library --tjh
376 */
377
378 ret = 1;
379
380 err:
381 explicit_bzero((char *)&ctx, sizeof(ctx));
382 explicit_bzero(buf, PEM_BUFSIZE);
383 return (ret);
384 }
385