1 /* $OpenBSD: pem_info.c,v 1.27 2023/07/07 13:40:44 beck 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_local.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 LCRYPTO_ALIAS(PEM_X509_INFO_read);
97
STACK_OF(X509_INFO)98 STACK_OF(X509_INFO) *
99 PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk, pem_password_cb *cb,
100 void *u)
101 {
102 X509_INFO *xi = NULL;
103 char *name = NULL, *header = NULL;
104 void *pp;
105 unsigned char *data = NULL;
106 const unsigned char *p;
107 long len;
108 int ok = 0;
109 int num_in, ptype, raw;
110 STACK_OF(X509_INFO) *ret = sk;
111 d2i_of_void *d2i = NULL;
112
113 if (ret == NULL) {
114 if ((ret = sk_X509_INFO_new_null()) == NULL) {
115 PEMerror(ERR_R_MALLOC_FAILURE);
116 return NULL;
117 }
118 }
119 num_in = sk_X509_INFO_num(ret);
120
121 if ((xi = X509_INFO_new()) == NULL)
122 goto err;
123 for (;;) {
124 raw = 0;
125 ptype = 0;
126 if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
127 if (ERR_GET_REASON(ERR_peek_last_error()) ==
128 PEM_R_NO_START_LINE) {
129 ERR_clear_error();
130 break;
131 }
132 goto err;
133 }
134 if ((strcmp(name, PEM_STRING_X509) == 0) ||
135 (strcmp(name, PEM_STRING_X509_OLD) == 0)) {
136 d2i = (D2I_OF(void))d2i_X509;
137 if (xi->x509 != NULL) {
138 if (!sk_X509_INFO_push(ret, xi))
139 goto err;
140 if ((xi = X509_INFO_new()) == NULL)
141 goto err;
142 }
143 pp = &(xi->x509);
144 } else if ((strcmp(name, PEM_STRING_X509_TRUSTED) == 0)) {
145 d2i = (D2I_OF(void))d2i_X509_AUX;
146 if (xi->x509 != NULL) {
147 if (!sk_X509_INFO_push(ret, xi))
148 goto err;
149 if ((xi = X509_INFO_new()) == NULL)
150 goto err;
151 }
152 pp = &(xi->x509);
153 } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
154 d2i = (D2I_OF(void))d2i_X509_CRL;
155 if (xi->crl != NULL) {
156 if (!sk_X509_INFO_push(ret, xi))
157 goto err;
158 if ((xi = X509_INFO_new()) == NULL)
159 goto err;
160 }
161 pp = &(xi->crl);
162 } else
163 #ifndef OPENSSL_NO_RSA
164 if (strcmp(name, PEM_STRING_RSA) == 0) {
165 d2i = (D2I_OF(void))d2i_RSAPrivateKey;
166 if (xi->x_pkey != NULL) {
167 if (!sk_X509_INFO_push(ret, xi))
168 goto err;
169 if ((xi = X509_INFO_new()) == NULL)
170 goto err;
171 }
172 xi->enc_data = NULL;
173 xi->enc_len = 0;
174 xi->x_pkey = X509_PKEY_new();
175 if (xi->x_pkey == NULL)
176 goto err;
177 ptype = EVP_PKEY_RSA;
178 pp = &xi->x_pkey->dec_pkey;
179 if (strlen(header) > 10) /* assume encrypted */
180 raw = 1;
181 } else
182 #endif
183 #ifndef OPENSSL_NO_DSA
184 if (strcmp(name, PEM_STRING_DSA) == 0) {
185 d2i = (D2I_OF(void))d2i_DSAPrivateKey;
186 if (xi->x_pkey != NULL) {
187 if (!sk_X509_INFO_push(ret, xi))
188 goto err;
189 if ((xi = X509_INFO_new()) == NULL)
190 goto err;
191 }
192 xi->enc_data = NULL;
193 xi->enc_len = 0;
194 xi->x_pkey = X509_PKEY_new();
195 if (xi->x_pkey == NULL)
196 goto err;
197 ptype = EVP_PKEY_DSA;
198 pp = &xi->x_pkey->dec_pkey;
199 if (strlen(header) > 10) /* assume encrypted */
200 raw = 1;
201 } else
202 #endif
203 #ifndef OPENSSL_NO_EC
204 if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
205 d2i = (D2I_OF(void))d2i_ECPrivateKey;
206 if (xi->x_pkey != NULL) {
207 if (!sk_X509_INFO_push(ret, xi))
208 goto err;
209 if ((xi = X509_INFO_new()) == NULL)
210 goto err;
211 }
212 xi->enc_data = NULL;
213 xi->enc_len = 0;
214 xi->x_pkey = X509_PKEY_new();
215 if (xi->x_pkey == NULL)
216 goto err;
217 ptype = EVP_PKEY_EC;
218 pp = &xi->x_pkey->dec_pkey;
219 if (strlen(header) > 10) /* assume encrypted */
220 raw = 1;
221 } else
222 #endif
223 {
224 d2i = NULL;
225 pp = NULL;
226 }
227
228 if (d2i != NULL) {
229 if (!raw) {
230 EVP_CIPHER_INFO cipher;
231
232 if (!PEM_get_EVP_CIPHER_INFO(header, &cipher))
233 goto err;
234 if (!PEM_do_header(&cipher, data, &len, cb, u))
235 goto err;
236 p = data;
237 if (ptype) {
238 if (!d2i_PrivateKey(ptype, pp, &p,
239 len)) {
240 PEMerror(ERR_R_ASN1_LIB);
241 goto err;
242 }
243 } else if (d2i(pp, &p, len) == NULL) {
244 PEMerror(ERR_R_ASN1_LIB);
245 goto err;
246 }
247 } else { /* encrypted RSA data */
248 if (!PEM_get_EVP_CIPHER_INFO(header,
249 &xi->enc_cipher))
250 goto err;
251 xi->enc_data = (char *)data;
252 xi->enc_len = (int)len;
253 data = NULL;
254 }
255 } else {
256 /* unknown */
257 }
258 free(name);
259 free(header);
260 free(data);
261 name = NULL;
262 header = NULL;
263 data = NULL;
264 }
265
266 /* if the last one hasn't been pushed yet and there is anything
267 * in it then add it to the stack ...
268 */
269 if ((xi->x509 != NULL) || (xi->crl != NULL) ||
270 (xi->x_pkey != NULL) || (xi->enc_data != NULL)) {
271 if (!sk_X509_INFO_push(ret, xi))
272 goto err;
273 xi = NULL;
274 }
275 ok = 1;
276
277 err:
278 if (!ok) {
279 while (sk_X509_INFO_num(ret) > num_in)
280 X509_INFO_free(sk_X509_INFO_pop(ret));
281 if (ret != sk)
282 sk_X509_INFO_free(ret);
283 ret = NULL;
284 }
285 X509_INFO_free(xi);
286 free(name);
287 free(header);
288 free(data);
289
290 return ret;
291 }
292 LCRYPTO_ALIAS(PEM_X509_INFO_read_bio);
293
294
295 /* A TJH addition */
296 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)297 PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
298 unsigned char *kstr, int klen, pem_password_cb *cb, void *u)
299 {
300 EVP_CIPHER_CTX ctx;
301 int i, ret = 0;
302 unsigned char *data = NULL;
303 const char *objstr = NULL;
304 char buf[PEM_BUFSIZE];
305 unsigned char *iv = NULL;
306
307 if (enc != NULL) {
308 objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
309 if (objstr == NULL) {
310 PEMerror(PEM_R_UNSUPPORTED_CIPHER);
311 goto err;
312 }
313 }
314
315 /* now for the fun part ... if we have a private key then
316 * we have to be able to handle a not-yet-decrypted key
317 * being written out correctly ... if it is decrypted or
318 * it is non-encrypted then we use the base code
319 */
320 if (xi->x_pkey != NULL) {
321 if ((xi->enc_data != NULL) && (xi->enc_len > 0) ) {
322 if (enc == NULL) {
323 PEMerror(PEM_R_CIPHER_IS_NULL);
324 goto err;
325 }
326
327 /* copy from weirdo names into more normal things */
328 iv = xi->enc_cipher.iv;
329 data = (unsigned char *)xi->enc_data;
330 i = xi->enc_len;
331
332 /* we take the encryption data from the
333 * internal stuff rather than what the
334 * user has passed us ... as we have to
335 * match exactly for some strange reason
336 */
337 objstr = OBJ_nid2sn(
338 EVP_CIPHER_nid(xi->enc_cipher.cipher));
339 if (objstr == NULL) {
340 PEMerror(PEM_R_UNSUPPORTED_CIPHER);
341 goto err;
342 }
343
344 /* create the right magic header stuff */
345 if (strlen(objstr) + 23 + 2 * enc->iv_len + 13 >
346 sizeof buf) {
347 PEMerror(ASN1_R_BUFFER_TOO_SMALL);
348 goto err;
349 }
350 buf[0] = '\0';
351 PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
352 PEM_dek_info(buf, objstr, enc->iv_len, (char *)iv);
353
354 /* use the normal code to write things out */
355 i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
356 if (i <= 0)
357 goto err;
358 } else {
359 /* Add DSA/DH */
360 #ifndef OPENSSL_NO_RSA
361 /* normal optionally encrypted stuff */
362 if (PEM_write_bio_RSAPrivateKey(bp,
363 xi->x_pkey->dec_pkey->pkey.rsa,
364 enc, kstr, klen, cb, u) <= 0)
365 goto err;
366 #endif
367 }
368 }
369
370 /* if we have a certificate then write it out now */
371 if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
372 goto err;
373
374 /* we are ignoring anything else that is loaded into the X509_INFO
375 * structure for the moment ... as I don't need it so I'm not
376 * coding it here and Eric can do it when this makes it into the
377 * base library --tjh
378 */
379
380 ret = 1;
381
382 err:
383 explicit_bzero((char *)&ctx, sizeof(ctx));
384 explicit_bzero(buf, PEM_BUFSIZE);
385 return (ret);
386 }
387 LCRYPTO_ALIAS(PEM_X509_INFO_write_bio);
388