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pem_pk8.c
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1 /* crypto/pem/pem_pkey.c */
2 /* Copyright (C) 1995-1998 Eric Young ([email protected])
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young ([email protected]).
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 ([email protected]).
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 ([email protected])"
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 ([email protected])"
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 
69 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder,
70  int nid, const EVP_CIPHER *enc,
71  char *kstr, int klen,
72  pem_password_cb *cb, void *u);
73 static int do_pk8pkey_fp(FILE *bp, EVP_PKEY *x, int isder,
74  int nid, const EVP_CIPHER *enc,
75  char *kstr, int klen,
76  pem_password_cb *cb, void *u);
77 
78 /* These functions write a private key in PKCS#8 format: it is a "drop in"
79  * replacement for PEM_write_bio_PrivateKey() and friends. As usual if 'enc'
80  * is NULL then it uses the unencrypted private key form. The 'nid' versions
81  * uses PKCS#5 v1.5 PBE algorithms whereas the others use PKCS#5 v2.0.
82  */
83 
84 int PEM_write_bio_PKCS8PrivateKey_nid(BIO *bp, EVP_PKEY *x, int nid,
85  char *kstr, int klen,
86  pem_password_cb *cb, void *u)
87 {
88  return do_pk8pkey(bp, x, 0, nid, NULL, kstr, klen, cb, u);
89 }
90 
91 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
92  char *kstr, int klen,
93  pem_password_cb *cb, void *u)
94 {
95  return do_pk8pkey(bp, x, 0, -1, enc, kstr, klen, cb, u);
96 }
97 
98 int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
99  char *kstr, int klen,
100  pem_password_cb *cb, void *u)
101 {
102  return do_pk8pkey(bp, x, 1, -1, enc, kstr, klen, cb, u);
103 }
104 
105 int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
106  char *kstr, int klen,
107  pem_password_cb *cb, void *u)
108 {
109  return do_pk8pkey(bp, x, 1, nid, NULL, kstr, klen, cb, u);
110 }
111 
112 static int do_pk8pkey(BIO *bp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
113  char *kstr, int klen,
114  pem_password_cb *cb, void *u)
115 {
116  X509_SIG *p8;
117  PKCS8_PRIV_KEY_INFO *p8inf;
118  char buf[PEM_BUFSIZE];
119  int ret;
120  if(!(p8inf = EVP_PKEY2PKCS8(x))) {
121  PEMerr(PEM_F_DO_PK8PKEY,
122  PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
123  return 0;
124  }
125  if(enc || (nid != -1)) {
126  if(!kstr) {
127  if(!cb) klen = PEM_def_callback(buf, PEM_BUFSIZE, 1, u);
128  else 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) OPENSSL_cleanse(buf, klen);
139  PKCS8_PRIV_KEY_INFO_free(p8inf);
140  if(isder) ret = i2d_PKCS8_bio(bp, p8);
141  else ret = PEM_write_bio_PKCS8(bp, p8);
142  X509_SIG_free(p8);
143  return ret;
144  } else {
145  if(isder) ret = i2d_PKCS8_PRIV_KEY_INFO_bio(bp, p8inf);
146  else ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
147  PKCS8_PRIV_KEY_INFO_free(p8inf);
148  return ret;
149  }
150 }
151 
152 EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u)
153 {
154  PKCS8_PRIV_KEY_INFO *p8inf = NULL;
155  X509_SIG *p8 = NULL;
156  int klen;
157  EVP_PKEY *ret;
158  char psbuf[PEM_BUFSIZE];
159  p8 = d2i_PKCS8_bio(bp, NULL);
160  if(!p8) return NULL;
161  if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
162  else klen=PEM_def_callback(psbuf,PEM_BUFSIZE,0,u);
163  if (klen <= 0) {
164  PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_BIO, PEM_R_BAD_PASSWORD_READ);
165  X509_SIG_free(p8);
166  return NULL;
167  }
168  p8inf = PKCS8_decrypt(p8, psbuf, klen);
169  X509_SIG_free(p8);
170  if(!p8inf) return NULL;
171  ret = EVP_PKCS82PKEY(p8inf);
172  PKCS8_PRIV_KEY_INFO_free(p8inf);
173  if(!ret) return NULL;
174  if(x) {
175  if(*x) EVP_PKEY_free(*x);
176  *x = ret;
177  }
178  return ret;
179 }
180 
181 #ifndef OPENSSL_NO_FP_API
182 
183 int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
184  char *kstr, int klen,
185  pem_password_cb *cb, void *u)
186 {
187  return do_pk8pkey_fp(fp, x, 1, -1, enc, kstr, klen, cb, u);
188 }
189 
190 int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,
191  char *kstr, int klen,
192  pem_password_cb *cb, void *u)
193 {
194  return do_pk8pkey_fp(fp, x, 1, nid, NULL, kstr, klen, cb, u);
195 }
196 
197 int PEM_write_PKCS8PrivateKey_nid(FILE *fp, EVP_PKEY *x, int nid,
198  char *kstr, int klen,
199  pem_password_cb *cb, void *u)
200 {
201  return do_pk8pkey_fp(fp, x, 0, nid, NULL, kstr, klen, cb, u);
202 }
203 
204 int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
205  char *kstr, int klen, pem_password_cb *cb, void *u)
206 {
207  return do_pk8pkey_fp(fp, x, 0, -1, enc, kstr, klen, cb, u);
208 }
209 
210 static int do_pk8pkey_fp(FILE *fp, EVP_PKEY *x, int isder, int nid, const EVP_CIPHER *enc,
211  char *kstr, int klen,
212  pem_password_cb *cb, void *u)
213 {
214  BIO *bp;
215  int ret;
216  if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
217  PEMerr(PEM_F_DO_PK8PKEY_FP,ERR_R_BUF_LIB);
218  return(0);
219  }
220  ret = do_pk8pkey(bp, x, isder, nid, enc, kstr, klen, cb, u);
221  BIO_free(bp);
222  return ret;
223 }
224 
225 EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u)
226 {
227  BIO *bp;
228  EVP_PKEY *ret;
229  if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
230  PEMerr(PEM_F_D2I_PKCS8PRIVATEKEY_FP,ERR_R_BUF_LIB);
231  return NULL;
232  }
233  ret = d2i_PKCS8PrivateKey_bio(bp, x, cb, u);
234  BIO_free(bp);
235  return ret;
236 }
237 
238 #endif
239 
240 IMPLEMENT_PEM_rw(PKCS8, X509_SIG, PEM_STRING_PKCS8, X509_SIG)
241 IMPLEMENT_PEM_rw(PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO, PEM_STRING_PKCS8INF,
242  PKCS8_PRIV_KEY_INFO)
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