pem_pkey.c revision 296465 
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
69EVP_PKEY *PEM_read_bio_PrivateKey(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
70                                  void *u)
71{
72    char *nm = NULL;
73    const unsigned char *p = NULL;
74    unsigned char *data = NULL;
75    long len;
76    EVP_PKEY *ret = NULL;
77
78    if (!PEM_bytes_read_bio(&data, &len, &nm, PEM_STRING_EVP_PKEY, bp, cb, u))
79        return NULL;
80    p = data;
81
82    if (strcmp(nm, PEM_STRING_RSA) == 0)
83        ret = d2i_PrivateKey(EVP_PKEY_RSA, x, &p, len);
84    else if (strcmp(nm, PEM_STRING_DSA) == 0)
85        ret = d2i_PrivateKey(EVP_PKEY_DSA, x, &p, len);
86    else if (strcmp(nm, PEM_STRING_ECPRIVATEKEY) == 0)
87        ret = d2i_PrivateKey(EVP_PKEY_EC, x, &p, len);
88    else if (strcmp(nm, PEM_STRING_PKCS8INF) == 0) {
89        PKCS8_PRIV_KEY_INFO *p8inf;
90        p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, &p, len);
91        if (!p8inf)
92            goto p8err;
93        ret = EVP_PKCS82PKEY(p8inf);
94        if (x) {
95            if (*x)
96                EVP_PKEY_free((EVP_PKEY *)*x);
97            *x = ret;
98        }
99        PKCS8_PRIV_KEY_INFO_free(p8inf);
100    } else if (strcmp(nm, PEM_STRING_PKCS8) == 0) {
101        PKCS8_PRIV_KEY_INFO *p8inf;
102        X509_SIG *p8;
103        int klen;
104        char psbuf[PEM_BUFSIZE];
105        p8 = d2i_X509_SIG(NULL, &p, len);
106        if (!p8)
107            goto p8err;
108        if (cb)
109            klen = cb(psbuf, PEM_BUFSIZE, 0, u);
110        else
111            klen = PEM_def_callback(psbuf, PEM_BUFSIZE, 0, u);
112        if (klen <= 0) {
113            PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, PEM_R_BAD_PASSWORD_READ);
114            X509_SIG_free(p8);
115            goto err;
116        }
117        p8inf = PKCS8_decrypt(p8, psbuf, klen);
118        X509_SIG_free(p8);
119        if (!p8inf)
120            goto p8err;
121        ret = EVP_PKCS82PKEY(p8inf);
122        if (x) {
123            if (*x)
124                EVP_PKEY_free((EVP_PKEY *)*x);
125            *x = ret;
126        }
127        PKCS8_PRIV_KEY_INFO_free(p8inf);
128    }
129 p8err:
130    if (ret == NULL)
131        PEMerr(PEM_F_PEM_READ_BIO_PRIVATEKEY, ERR_R_ASN1_LIB);
132 err:
133    OPENSSL_free(nm);
134    OPENSSL_cleanse(data, len);
135    OPENSSL_free(data);
136    return (ret);
137}
138
139#ifndef OPENSSL_NO_FP_API
140EVP_PKEY *PEM_read_PrivateKey(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
141                              void *u)
142{
143    BIO *b;
144    EVP_PKEY *ret;
145
146    if ((b = BIO_new(BIO_s_file())) == NULL) {
147        PEMerr(PEM_F_PEM_READ_PRIVATEKEY, ERR_R_BUF_LIB);
148        return (0);
149    }
150    BIO_set_fp(b, fp, BIO_NOCLOSE);
151    ret = PEM_read_bio_PrivateKey(b, x, cb, u);
152    BIO_free(b);
153    return (ret);
154}
155#endif
156