1 /* crypto/pem/pem_pkey.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 <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/buffer.h>
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
64 #include <openssl/rand.h>
65 #include <openssl/x509.h>
66 #include <openssl/pkcs12.h>
67 #include <openssl/pem.h>
68 #ifndef OPENSSL_NO_ENGINE
69 # include <openssl/engine.h>
70 #endif
71 #ifndef OPENSSL_NO_DH
72 # include <openssl/dh.h>
73 #endif
74 #include "asn1_locl.h"
75
76 int pem_check_suffix(const char *pem_str, const char *suffix);
77
PEM_read_bio_PrivateKey(BIO * bp,EVP_PKEY ** x,pem_password_cb * cb,void * u)78 EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
79 void *u)
80 {
81 char *nm = NULL;
82 const unsigned char *p = NULL;
83 unsigned char *data = NULL;
84 long len;
85 int slen;
86 EVP_PKEY *ret = NULL;
87
88 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u))
89 return NULL;
90 p = data;
91
92 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
93 PKCS8_PRIV_KEY_INFO *p8inf;
94 p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
95 if (!p8inf)
96 goto p8err;
97 ret = EVP_PKCS82PKEY(p8inf);
98 if (x) {
99 if (*x)
100 EVP_PKEY_free((EVP_PKEY *)*x);
101 *x = ret;
102 }
103 PKCS8_PRIV_KEY_INFO_free(p8inf);
104 } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
105 PKCS8_PRIV_KEY_INFO *p8inf;
106 X509_SIG *p8;
107 int klen;
108 char psbuf[PEM_BUFSIZE];
109 p8 = d2i_X509_SIG(NULL, &p, len);
110 if (!p8)
111 goto p8err;
112 if (cb)
113 klen = cb(psbuf, PEM_BUFSIZE, 0, u);
114 else
115 klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
116 if (klen < 0) {
117 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
118 X509_SIG_free(p8);
119 goto err;
120 }
121 p8inf = PKCS8_decrypt(p8, psbuf, klen);
122 X509_SIG_free(p8);
123 OPENSSL_cleanse(psbuf, klen);
124 if (!p8inf)
125 goto p8err;
126 ret = EVP_PKCS82PKEY(p8inf);
127 if (x) {
128 if (*x)
129 EVP_PKEY_free((EVP_PKEY *)*x);
130 *x = ret;
131 }
132 PKCS8_PRIV_KEY_INFO_free(p8inf);
133 } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
134 const EVP_PKEY_ASN1_METHOD *ameth;
135 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
136 if (!ameth || !ameth->old_priv_decode)
137 goto p8err;
138 ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
139 }
140 p8err:
141 if (ret == NULL)
142 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
143 err:
144 OPENSSL_free(nm);
145 OPENSSL_cleanse(data, len);
146 OPENSSL_free(data);
147 return (ret);
148 }
149
PEM_write_bio_PrivateKey(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)150 int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
151 unsigned char *kstr, int klen,
152 pem_password_cb *cb, void *u)
153 {
154 char pem_str[80];
155 if (!x->ameth || x->ameth->priv_encode)
156 return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
157 (char *)kstr, klen, cb, u);
158
159 BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
160 return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
161 pem_str, bp, x, enc, kstr, klen, cb, u);
162 }
163
PEM_read_bio_Parameters(BIO * bp,EVP_PKEY ** x)164 EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
165 {
166 char *nm = NULL;
167 const unsigned char *p = NULL;
168 unsigned char *data = NULL;
169 long len;
170 int slen;
171 EVP_PKEY *ret = NULL;
172
173 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
174 bp, 0, NULL))
175 return NULL;
176 p = data;
177
178 if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
179 ret = EVP_PKEY_new();
180 if (!ret)
181 goto err;
182 if (!EVP_PKEY_set_type_str(ret, nm, slen)
183 || !ret->ameth->param_decode
184 || !ret->ameth->param_decode(ret, &p, len)) {
185 EVP_PKEY_free(ret);
186 ret = NULL;
187 goto err;
188 }
189 if (x) {
190 if (*x)
191 EVP_PKEY_free((EVP_PKEY *)*x);
192 *x = ret;
193 }
194 }
195 err:
196 if (ret == NULL)
197 PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
198 OPENSSL_free(nm);
199 OPENSSL_free(data);
200 return (ret);
201 }
202
PEM_write_bio_Parameters(BIO * bp,EVP_PKEY * x)203 int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
204 {
205 char pem_str[80];
206 if (!x->ameth || !x->ameth->param_encode)
207 return 0;
208
209 BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
210 return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
211 pem_str, bp, x, NULL, NULL, 0, 0, NULL);
212 }
213
214 #ifndef OPENSSL_NO_FP_API
PEM_read_PrivateKey(FILE * fp,EVP_PKEY ** x,pem_password_cb * cb,void * u)215 EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
216 void *u)
217 {
218 BIO *b;
219 EVP_PKEY *ret;
220
221 if ((b = BIO_new(BIO_s_file())) == NULL) {
222 PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
223 return (0);
224 }
225 BIO_set_fp(b, fp, BIO_NOCLOSE);
226 ret = PEM_read_bio_PrivateKey(b, x, cb, u);
227 BIO_free(b);
228 return (ret);
229 }
230
PEM_write_PrivateKey(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)231 int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
232 unsigned char *kstr, int klen,
233 pem_password_cb *cb, void *u)
234 {
235 BIO *b;
236 int ret;
237
238 if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
239 PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
240 return 0;
241 }
242 ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
243 BIO_free(b);
244 return ret;
245 }
246
247 #endif
248
249 #ifndef OPENSSL_NO_DH
250
251 /* Transparently read in PKCS#3 or X9.42 DH parameters */
252
PEM_read_bio_DHparams(BIO * bp,DH ** x,pem_password_cb * cb,void * u)253 DH *PEM_read_bio_DHparams(BIO *bp, DH **x, pem_password_cb *cb, void *u)
254 {
255 char *nm = NULL;
256 const unsigned char *p = NULL;
257 unsigned char *data = NULL;
258 long len;
259 DH *ret = NULL;
260
261 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_DHPARAMS, bp, cb, u))
262 return NULL;
263 p = data;
264
265 if (!strcmp(nm, PEM_STRING_DHXPARAMS))
266 ret = d2i_DHxparams(x, &p, len);
267 else
268 ret = d2i_DHparams(x, &p, len);
269
270 if (ret == NULL)
271 PEMerr(PEM_F_PEM_READ_BIO_DHPARAMS, ERR_R_ASN1_LIB);
272 OPENSSL_free(nm);
273 OPENSSL_free(data);
274 return ret;
275 }
276
277 # ifndef OPENSSL_NO_FP_API
PEM_read_DHparams(FILE * fp,DH ** x,pem_password_cb * cb,void * u)278 DH *PEM_read_DHparams(FILE *fp, DH **x, pem_password_cb *cb, void *u)
279 {
280 BIO *b;
281 DH *ret;
282
283 if ((b = BIO_new(BIO_s_file())) == NULL) {
284 PEMerr(PEM_F_PEM_READ_DHPARAMS, ERR_R_BUF_LIB);
285 return (0);
286 }
287 BIO_set_fp(b, fp, BIO_NOCLOSE);
288 ret = PEM_read_bio_DHparams(b, x, cb, u);
289 BIO_free(b);
290 return (ret);
291 }
292 # endif
293
294 #endif
295