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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 
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 
PEM_write_bio_PKCS8PrivateKey_nid(BIO * bp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)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 
PEM_write_bio_PKCS8PrivateKey(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)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 
i2d_PKCS8PrivateKey_bio(BIO * bp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)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 
i2d_PKCS8PrivateKey_nid_bio(BIO * bp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)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 
do_pk8pkey(BIO * bp,EVP_PKEY * x,int isder,int nid,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)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 
d2i_PKCS8PrivateKey_bio(BIO * bp,EVP_PKEY ** x,pem_password_cb * cb,void * u)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 
i2d_PKCS8PrivateKey_fp(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)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 
i2d_PKCS8PrivateKey_nid_fp(FILE * fp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)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 
PEM_write_PKCS8PrivateKey_nid(FILE * fp,EVP_PKEY * x,int nid,char * kstr,int klen,pem_password_cb * cb,void * u)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 
PEM_write_PKCS8PrivateKey(FILE * fp,EVP_PKEY * x,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)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 
do_pk8pkey_fp(FILE * fp,EVP_PKEY * x,int isder,int nid,const EVP_CIPHER * enc,char * kstr,int klen,pem_password_cb * cb,void * u)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 
d2i_PKCS8PrivateKey_fp(FILE * fp,EVP_PKEY ** x,pem_password_cb * cb,void * u)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)
243