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 #include "asn1_locl.h"
72
73 int pem_check_suffix(const char *pem_str, const char *suffix);
74
PEM_read_bio_PrivateKey(BIO * bp,EVP_PKEY ** x,pem_password_cb * cb,void * u)75 EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
76 void *u)
77 {
78 char *nm = NULL;
79 const unsigned char *p = NULL;
80 unsigned char *data = NULL;
81 long len;
82 int slen;
83 EVP_PKEY *ret = NULL;
84
85 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u))
86 return NULL;
87 p = data;
88
89 if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
90 PKCS8_PRIV_KEY_INFO *p8inf;
91 p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
92 if (!p8inf)
93 goto p8err;
94 ret = EVP_PKCS82PKEY(p8inf);
95 if (x) {
96 if (*x)
97 EVP_PKEY_free((EVP_PKEY *)*x);
98 *x = ret;
99 }
100 PKCS8_PRIV_KEY_INFO_free(p8inf);
101 } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
102 PKCS8_PRIV_KEY_INFO *p8inf;
103 X509_SIG *p8;
104 int klen;
105 char psbuf[PEM_BUFSIZE];
106 p8 = d2i_X509_SIG(NULL, &p, len);
107 if (!p8)
108 goto p8err;
109 if (cb)
110 klen = cb(psbuf, PEM_BUFSIZE, 0, u);
111 else
112 klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
113 if (klen <= 0) {
114 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
115 X509_SIG_free(p8);
116 goto err;
117 }
118 p8inf = PKCS8_decrypt(p8, psbuf, klen);
119 X509_SIG_free(p8);
120 if (!p8inf)
121 goto p8err;
122 ret = EVP_PKCS82PKEY(p8inf);
123 if (x) {
124 if (*x)
125 EVP_PKEY_free((EVP_PKEY *)*x);
126 *x = ret;
127 }
128 PKCS8_PRIV_KEY_INFO_free(p8inf);
129 } else if ((slen = pem_check_suffix(nm, "PRIVATE KEY")) > 0) {
130 const EVP_PKEY_ASN1_METHOD *ameth;
131 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
132 if (!ameth || !ameth->old_priv_decode)
133 goto p8err;
134 ret = d2i_PrivateKey(ameth->pkey_id, x, &p, len);
135 }
136 p8err:
137 if (ret == NULL)
138 PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
139 err:
140 OPENSSL_free(nm);
141 OPENSSL_cleanse(data, len);
142 OPENSSL_free(data);
143 return (ret);
144 }
145
PEM_write_bio_PrivateKey(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)146 int PEM_write_bio_PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
147 unsigned char *kstr, int klen,
148 pem_password_cb *cb, void *u)
149 {
150 char pem_str[80];
151 if (!x->ameth || x->ameth->priv_encode)
152 return PEM_write_bio_PKCS8PrivateKey(bp, x, enc,
153 (char *)kstr, klen, cb, u);
154
155 BIO_snprintf(pem_str, 80, "%s PRIVATE KEY", x->ameth->pem_str);
156 return PEM_ASN1_write_bio((i2d_of_void *)i2d_PrivateKey,
157 pem_str, bp, x, enc, kstr, klen, cb, u);
158 }
159
PEM_read_bio_Parameters(BIO * bp,EVP_PKEY ** x)160 EVP_PKEY *PEM_read_bio_Parameters(BIO *bp, EVP_PKEY **x)
161 {
162 char *nm = NULL;
163 const unsigned char *p = NULL;
164 unsigned char *data = NULL;
165 long len;
166 int slen;
167 EVP_PKEY *ret = NULL;
168
169 if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_PARAMETERS,
170 bp, 0, NULL))
171 return NULL;
172 p = data;
173
174 if ((slen = pem_check_suffix(nm, "PARAMETERS")) > 0) {
175 ret = EVP_PKEY_new();
176 if (!ret)
177 goto err;
178 if (!EVP_PKEY_set_type_str(ret, nm, slen)
179 || !ret->ameth->param_decode
180 || !ret->ameth->param_decode(ret, &p, len)) {
181 EVP_PKEY_free(ret);
182 ret = NULL;
183 goto err;
184 }
185 if (x) {
186 if (*x)
187 EVP_PKEY_free((EVP_PKEY *)*x);
188 *x = ret;
189 }
190 }
191 err:
192 if (ret == NULL)
193 PEMerr(PEM_F_PEM_READ_BIO_PARAMETERS, ERR_R_ASN1_LIB);
194 OPENSSL_free(nm);
195 OPENSSL_free(data);
196 return (ret);
197 }
198
PEM_write_bio_Parameters(BIO * bp,EVP_PKEY * x)199 int PEM_write_bio_Parameters(BIO *bp, EVP_PKEY *x)
200 {
201 char pem_str[80];
202 if (!x->ameth || !x->ameth->param_encode)
203 return 0;
204
205 BIO_snprintf(pem_str, 80, "%s PARAMETERS", x->ameth->pem_str);
206 return PEM_ASN1_write_bio((i2d_of_void *)x->ameth->param_encode,
207 pem_str, bp, x, NULL, NULL, 0, 0, NULL);
208 }
209
210 #ifndef OPENSSL_NO_FP_API
PEM_read_PrivateKey(FILE * fp,EVP_PKEY ** x,pem_password_cb * cb,void * u)211 EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
212 void *u)
213 {
214 BIO *b;
215 EVP_PKEY *ret;
216
217 if ((b = BIO_new(BIO_s_file())) == NULL) {
218 PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
219 return (0);
220 }
221 BIO_set_fp(b, fp, BIO_NOCLOSE);
222 ret = PEM_read_bio_PrivateKey(b, x, cb, u);
223 BIO_free(b);
224 return (ret);
225 }
226
PEM_write_PrivateKey(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,unsigned char * kstr,int klen,pem_password_cb * cb,void * u)227 int PEM_write_PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
228 unsigned char *kstr, int klen,
229 pem_password_cb *cb, void *u)
230 {
231 BIO *b;
232 int ret;
233
234 if ((b = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) {
235 PEMerr(PEM_F_PEM_WRITE_PRIVATEKEY, ERR_R_BUF_LIB);
236 return 0;
237 }
238 ret = PEM_write_bio_PrivateKey(b, x, enc, kstr, klen, cb, u);
239 BIO_free(b);
240 return ret;
241 }
242
243 #endif
244