pem_pk8.c revision 280304 
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
69static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,
70                      int nid, const EVP_CIPHER *enc,
71                      char *kstr, int klen, pem_password_cb *cb, void *u);
72static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,
73                         int nid, const EVP_CIPHER *enc,
74                         char *kstr, int klen, pem_password_cb *cb, void *u);
75
76/*
77 * These functions write a private key in PKCS#8 format: it is a "drop in"
78 * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
79 * is NULL then it uses the unencrypted private key form. The 'nid' versions
80 * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
81 */
82
83int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,
84                                      char *kstr, int klen,
85                                      pem_password_cb *cb, void *u)
86{
87    return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
88}
89
90int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
91                                  char *kstr, int klen,
92                                  pem_password_cb *cb, void *u)
93{
94    return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
95}
96
97int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
98                            char *kstr, int klen,
99                            pem_password_cb *cb, void *u)
100{
101    return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
102}
103
104int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
105                                char *kstr, int klen,
106                                pem_password_cb *cb, void *u)
107{
108    return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
109}
110
111static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid,
112                      const EVP_CIPHER *enc, char *kstr, int klen,
113                      pem_password_cb *cb, void *u)
114{
115    X509_SIG *p8;
116    PKCS8_PRIV_KEY_INFO *p8inf;
117    char buf[PEM_BUFSIZE];
118    int ret;
119    if (!(p8inf = EVP_PKEY2PKCS8(x))) {
120        PEMerr(PEM_F_DO_PK8PKEY, PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
121        return 0;
122    }
123    if (enc || (nid != -1)) {
124        if (!kstr) {
125            if (!cb)
126                klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
127            else
128                klen = cb(buf, PEM_BUFSIZE, 1, u);
129            if (klen <= 0) {
130                PEMerr(PEM_F_DO_PK8PKEY, PEM_R_READ_KEY);
131                PKCS8_PRIV_KEY_INFO_free(p8inf);
132                return 0;
133            }
134
135            kstr = buf;
136        }
137        p8 = PKCS8_encrypt(nid, enc, kstr, klen, NULL, 0, 0, p8inf);
138        if (kstr == buf)
139            OPENSSL_cleanse(buf, klen);
140        PKCS8_PRIV_KEY_INFO_free(p8inf);
141        if (isder)
142            ret = i2d_PKCS8_bio(bp, p8);
143        else
144            ret = PEM_write_bio_PKCS8(bp, p8);
145        X509_SIG_free(p8);
146        return ret;
147    } else {
148        if (isder)
149            ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
150        else
151            ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
152        PKCS8_PRIV_KEY_INFO_free(p8inf);
153        return ret;
154    }
155}
156
157EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb,
158                                  void *u)
159{
160    PKCS8_PRIV_KEY_INFO *p8inf = NULL;
161    X509_SIG *p8 = NULL;
162    int klen;
163    EVP_PKEY *ret;
164    char psbuf[PEM_BUFSIZE];
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        PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, 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        if (*x)
187            EVP_PKEY_free(*x);
188        *x = ret;
189    }
190    return ret;
191}
192
193#ifndef OPENSSL_NO_FP_API
194
195int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
196                           char *kstr, int klen, pem_password_cb *cb, void *u)
197{
198    return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);
199}
200
201int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,
202                               char *kstr, int klen,
203                               pem_password_cb *cb, void *u)
204{
205    return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);
206}
207
208int PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid,
209                                  char *kstr, int klen,
210                                  pem_password_cb *cb, void *u)
211{
212    return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);
213}
214
215int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
216                              char *kstr, int klen, pem_password_cb *cb,
217                              void *u)
218{
219    return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);
220}
221
222static int do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid,
223                         const EVP_CIPHER *enc, char *kstr, int klen,
224                         pem_password_cb *cb, void *u)
225{
226    BIO *bp;
227    int ret;
228    if (!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
229        PEMerr(PEM_F_DO_PK8PKEY_FP, 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
237EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb,
238                                 void *u)
239{
240    BIO *bp;
241    EVP_PKEY *ret;
242    if (!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
243        PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP, ERR_R_BUF_LIB);
244        return NULL;
245    }
246    ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
247    BIO_free(bp);
248    return ret;
249}
250
251#endif
252
253IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG)
254
255
256IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF,
257             PKCS8_PRIV_KEY_INFO)
258