pem_pkey.c revision 296341 
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
73int pem_check_suffix(const char *pem_str, const char *suffix);
74
75EVP_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
146int 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
160EVP_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
199int 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
211EVP_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
227int 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