1 /* $OpenBSD: pem_pk8.c,v 1.13 2017/01/29 17:49:23 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/buffer.h>
63 #include <openssl/err.h>
64 #include <openssl/evp.h>
65 #include <openssl/objects.h>
66 #include <openssl/pem.h>
67 #include <openssl/pkcs12.h>
68 #include <openssl/x509.h>
69
70 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid,
71 const EVP_CIPHER *enc, char *kstr, int klen, pem_password_cb *cb, void *u);
72 static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder, int nid,
73 const EVP_CIPHER *enc, char *kstr, int klen, pem_password_cb *cb, void *u);
74
75 /* These functions write a private key in PKCS#8 format: it is a "drop in"
76 * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
77 * is NULL then it uses the unencrypted private key form. The 'nid' versions
78 * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
79 */
80
81 int
PEM_write_bio_PKCS8PrivateKey_nid(BIO * bp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)82 PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid, char *kstr,
83 int klen, pem_password_cb *cb, void *u)
84 {
85 return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
86 }
87
88 int
PEM_write_bio_PKCS8PrivateKey(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)89 PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
90 char *kstr, int klen, pem_password_cb *cb, void *u)
91 {
92 return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
93 }
94
95 int
i2d_PKCS8PrivateKey_bio(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)96 i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
97 char *kstr, int klen, pem_password_cb *cb, void *u)
98 {
99 return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
100 }
101
102 int
i2d_PKCS8PrivateKey_nid_bio(BIO * bp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)103 i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
104 char *kstr, int klen, pem_password_cb *cb, void *u)
105 {
106 return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
107 }
108
109 static int
do_pk8pkey(BIO * bp,EVP_PKEY * x,int isder,int nid,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)110 do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
111 char *kstr, int klen, pem_password_cb *cb, void *u)
112 {
113 X509_SIG *p8;
114 PKCS8_PRIV_KEY_INFO *p8inf;
115 char buf[PEM_BUFSIZE];
116 int ret;
117
118 if (!(p8inf = EVP_PKEY2PKCS8(x))) {
119 PEMerror(PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
120 return 0;
121 }
122 if (enc || (nid != -1)) {
123 if (!kstr) {
124 if (!cb)
125 klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
126 else
127 klen = cb(buf, PEM_BUFSIZE, 1, u);
128 if (klen <= 0) {
129 PEMerror(PEM_R_READ_KEY);
130 PKCS8_PRIV_KEY_INFO_free(p8inf);
131 return 0;
132 }
133
134 kstr = buf;
135 }
136 p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
137 if (kstr == buf)
138 explicit_bzero(buf, klen);
139 PKCS8_PRIV_KEY_INFO_free(p8inf);
140 if (isder)
141 ret = i2d_PKCS8_bio(bp, p8);
142 else
143 ret = PEM_write_bio_PKCS8(bp, p8);
144 X509_SIG_free(p8);
145 return ret;
146 } else {
147 if (isder)
148 ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
149 else
150 ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
151 PKCS8_PRIV_KEY_INFO_free(p8inf);
152 return ret;
153 }
154 }
155
156 EVP_PKEY *
d2i_PKCS8PrivateKey_bio(BIO * bp,EVP_PKEY ** x,pem_password_cb * cb,void * u)157 d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
158 {
159 PKCS8_PRIV_KEY_INFO *p8inf = NULL;
160 X509_SIG *p8 = NULL;
161 int klen;
162 EVP_PKEY *ret;
163 char psbuf[PEM_BUFSIZE];
164
165 p8 = d2i_PKCS8_bio(bp, NULL);
166 if (!p8)
167 return NULL;
168 if (cb)
169 klen = cb(psbuf, PEM_BUFSIZE, 0, u);
170 else
171 klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
172 if (klen <= 0) {
173 PEMerror(PEM_R_BAD_PASSWORD_READ);
174 X509_SIG_free(p8);
175 return NULL;
176 }
177 p8inf = PKCS8_decrypt(p8, psbuf, klen);
178 X509_SIG_free(p8);
179 if (!p8inf)
180 return NULL;
181 ret = EVP_PKCS82PKEY(p8inf);
182 PKCS8_PRIV_KEY_INFO_free(p8inf);
183 if (!ret)
184 return NULL;
185 if (x) {
186 EVP_PKEY_free(*x);
187 *x = ret;
188 }
189 return ret;
190 }
191
192
193 int
i2d_PKCS8PrivateKey_fp(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)194 i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
195 char *kstr, int klen, pem_password_cb *cb, void *u)
196 {
197 return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);
198 }
199
200 int
i2d_PKCS8PrivateKey_nid_fp(FILE * fp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)201 i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid, char *kstr,
202 int klen, pem_password_cb *cb, void *u)
203 {
204 return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);
205 }
206
207 int
PEM_write_PKCS8PrivateKey_nid(FILE * fp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)208 PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid, char *kstr,
209 int klen, pem_password_cb *cb, void *u)
210 {
211 return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);
212 }
213
214 int
PEM_write_PKCS8PrivateKey(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)215 PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
216 char *kstr, int klen, pem_password_cb *cb, void *u)
217 {
218 return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);
219 }
220
221 static int
do_pk8pkey_fp(FILE * fp,EVP_PKEY * x,int isder,int nid,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)222 do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
223 char *kstr, int klen, pem_password_cb *cb, void *u)
224 {
225 BIO *bp;
226 int ret;
227
228 if (!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
229 PEMerror(ERR_R_BUF_LIB);
230 return (0);
231 }
232 ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);
233 BIO_free(bp);
234 return ret;
235 }
236
237 EVP_PKEY *
d2i_PKCS8PrivateKey_fp(FILE * fp,EVP_PKEY ** x,pem_password_cb * cb,void * u)238 d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u)
239 {
240 BIO *bp;
241 EVP_PKEY *ret;
242
243 if (!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
244 PEMerror(ERR_R_BUF_LIB);
245 return NULL;
246 }
247 ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
248 BIO_free(bp);
249 return ret;
250 }
251
252 X509_SIG *
PEM_read_PKCS8(FILE * fp,X509_SIG ** x,pem_password_cb * cb,void * u)253 PEM_read_PKCS8(FILE *fp, X509_SIG **x, pem_password_cb *cb, void *u)
254 {
255 return PEM_ASN1_read((d2i_of_void *)d2i_X509_SIG, PEM_STRING_PKCS8, fp,
256 (void **)x, cb, u);
257 }
258
259 int
PEM_write_PKCS8(FILE * fp,X509_SIG * x)260 PEM_write_PKCS8(FILE *fp, X509_SIG *x)
261 {
262 return PEM_ASN1_write((i2d_of_void *)i2d_X509_SIG, PEM_STRING_PKCS8, fp,
263 x, NULL, NULL, 0, NULL, NULL);
264 }
265
266 X509_SIG *
PEM_read_bio_PKCS8(BIO * bp,X509_SIG ** x,pem_password_cb * cb,void * u)267 PEM_read_bio_PKCS8(BIO *bp, X509_SIG **x, pem_password_cb *cb, void *u)
268 {
269 return PEM_ASN1_read_bio((d2i_of_void *)d2i_X509_SIG, PEM_STRING_PKCS8, bp,
270 (void **)x, cb, u);
271 }
272
273 int
PEM_write_bio_PKCS8(BIO * bp,X509_SIG * x)274 PEM_write_bio_PKCS8(BIO *bp, X509_SIG *x)
275 {
276 return PEM_ASN1_write_bio((i2d_of_void *)i2d_X509_SIG, PEM_STRING_PKCS8, bp,
277 x, NULL, NULL, 0, NULL, NULL);
278 }
279
280 PKCS8_PRIV_KEY_INFO *
PEM_read_PKCS8_PRIV_KEY_INFO(FILE * fp,PKCS8_PRIV_KEY_INFO ** x,pem_password_cb * cb,void * u)281 PEM_read_PKCS8_PRIV_KEY_INFO(FILE *fp, PKCS8_PRIV_KEY_INFO **x, pem_password_cb *cb, void *u)
282 {
283 return PEM_ASN1_read((d2i_of_void *)d2i_PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF, fp,
284 (void **)x, cb, u);
285 }
286
287 int
PEM_write_PKCS8_PRIV_KEY_INFO(FILE * fp,PKCS8_PRIV_KEY_INFO * x)288 PEM_write_PKCS8_PRIV_KEY_INFO(FILE *fp, PKCS8_PRIV_KEY_INFO *x)
289 {
290 return PEM_ASN1_write((i2d_of_void *)i2d_PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF, fp,
291 x, NULL, NULL, 0, NULL, NULL);
292 }
293
294 PKCS8_PRIV_KEY_INFO *
PEM_read_bio_PKCS8_PRIV_KEY_INFO(BIO * bp,PKCS8_PRIV_KEY_INFO ** x,pem_password_cb * cb,void * u)295 PEM_read_bio_PKCS8_PRIV_KEY_INFO(BIO *bp, PKCS8_PRIV_KEY_INFO **x, pem_password_cb *cb, void *u)
296 {
297 return PEM_ASN1_read_bio((d2i_of_void *)d2i_PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF, bp,
298 (void **)x, cb, u);
299 }
300
301 int
PEM_write_bio_PKCS8_PRIV_KEY_INFO(BIO * bp,PKCS8_PRIV_KEY_INFO * x)302 PEM_write_bio_PKCS8_PRIV_KEY_INFO(BIO *bp, PKCS8_PRIV_KEY_INFO *x)
303 {
304 return PEM_ASN1_write_bio((i2d_of_void *)i2d_PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF, bp,
305 x, NULL, NULL, 0, NULL, NULL);
306 }
307