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1/* crypto/asn1/n_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#ifndef OPENSSL_NO_RSA
60#include <stdio.h>
61#include "cryptlib.h"
62#include <openssl/rsa.h>
63#include <openssl/objects.h>
64#include <openssl/asn1t.h>
65#include <openssl/asn1_mac.h>
66#include <openssl/evp.h>
67#include <openssl/x509.h>
68
69
70#ifndef OPENSSL_NO_RC4
71
72typedef struct netscape_pkey_st
73 {
74 long version;
75 X509_ALGOR *algor;
76 ASN1_OCTET_STRING *private_key;
77 } NETSCAPE_PKEY;
78
79typedef struct netscape_encrypted_pkey_st
80 {
81 ASN1_OCTET_STRING *os;
82 /* This is the same structure as DigestInfo so use it:
83 * although this isn't really anything to do with
84 * digests.
85 */
86 X509_SIG *enckey;
87 } NETSCAPE_ENCRYPTED_PKEY;
88
89
90ASN1_BROKEN_SEQUENCE(NETSCAPE_ENCRYPTED_PKEY) = {
91 ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, os, ASN1_OCTET_STRING),
92 ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, enckey, X509_SIG)
93} ASN1_BROKEN_SEQUENCE_END(NETSCAPE_ENCRYPTED_PKEY)
94
95DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)
96DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY)
97IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)
98
99ASN1_SEQUENCE(NETSCAPE_PKEY) = {
100 ASN1_SIMPLE(NETSCAPE_PKEY, version, LONG),
101 ASN1_SIMPLE(NETSCAPE_PKEY, algor, X509_ALGOR),
102 ASN1_SIMPLE(NETSCAPE_PKEY, private_key, ASN1_OCTET_STRING)
103} ASN1_SEQUENCE_END(NETSCAPE_PKEY)
104
105DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)
106DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY)
107IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)
108
109static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
110 int (*cb)(), int sgckey);
111
112int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, int (*cb)())
113{
114 return i2d_RSA_NET(a, pp, cb, 0);
115}
116
117int i2d_RSA_NET(const RSA *a, unsigned char **pp, int (*cb)(), int sgckey)
118 {
119 int i, j, ret = 0;
120 int rsalen, pkeylen, olen;
121 NETSCAPE_PKEY *pkey = NULL;
122 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
123 unsigned char buf[256],*zz;
124 unsigned char key[EVP_MAX_KEY_LENGTH];
125 EVP_CIPHER_CTX ctx;
126
127 if (a == NULL) return(0);
128
129 if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
130 if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err;
131 pkey->version = 0;
132
133 pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
134 if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
135 pkey->algor->parameter->type=V_ASN1_NULL;
136
137 rsalen = i2d_RSAPrivateKey(a, NULL);
138
139 /* Fake some octet strings just for the initial length
140 * calculation.
141 */
142
143 pkey->private_key->length=rsalen;
144
145 pkeylen=i2d_NETSCAPE_PKEY(pkey,NULL);
146
147 enckey->enckey->digest->length = pkeylen;
148
149 enckey->os->length = 11; /* "private-key" */
150
151 enckey->enckey->algor->algorithm=OBJ_nid2obj(NID_rc4);
152 if ((enckey->enckey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
153 enckey->enckey->algor->parameter->type=V_ASN1_NULL;
154
155 if (pp == NULL)
156 {
157 olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL);
158 NETSCAPE_PKEY_free(pkey);
159 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
160 return olen;
161 }
162
163
164 /* Since its RC4 encrypted length is actual length */
165 if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL)
166 {
167 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
168 goto err;
169 }
170
171 pkey->private_key->data = zz;
172 /* Write out private key encoding */
173 i2d_RSAPrivateKey(a,&zz);
174
175 if ((zz=OPENSSL_malloc(pkeylen)) == NULL)
176 {
177 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
178 goto err;
179 }
180
181 if (!ASN1_STRING_set(enckey->os, "private-key", -1))
182 {
183 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
184 goto err;
185 }
186 enckey->enckey->digest->data = zz;
187 i2d_NETSCAPE_PKEY(pkey,&zz);
188
189 /* Wipe the private key encoding */
190 OPENSSL_cleanse(pkey->private_key->data, rsalen);
191
192 if (cb == NULL)
193 cb=EVP_read_pw_string;
194 i=cb(buf,256,"Enter Private Key password:",1);
195 if (i != 0)
196 {
197 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ);
198 goto err;
199 }
200 i = strlen((char *)buf);
201 /* If the key is used for SGC the algorithm is modified a little. */
202 if(sgckey) {
203 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
204 memcpy(buf + 16, "SGCKEYSALT", 10);
205 i = 26;
206 }
207
208 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
209 OPENSSL_cleanse(buf,256);
210
211 /* Encrypt private key in place */
212 zz = enckey->enckey->digest->data;
213 EVP_CIPHER_CTX_init(&ctx);
214 EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL);
215 EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen);
216 EVP_EncryptFinal_ex(&ctx,zz + i,&j);
217 EVP_CIPHER_CTX_cleanup(&ctx);
218
219 ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);
220err:
221 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
222 NETSCAPE_PKEY_free(pkey);
223 return(ret);
224 }
225
226
227RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, int (*cb)())
228{
229 return d2i_RSA_NET(a, pp, length, cb, 0);
230}
231
232RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, int (*cb)(), int sgckey)
233 {
234 RSA *ret=NULL;
235 const unsigned char *p, *kp;
236 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
237
238 p = *pp;
239
240 enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length);
241 if(!enckey) {
242 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_DECODING_ERROR);
243 return NULL;
244 }
245
246 if ((enckey->os->length != 11) || (strncmp("private-key",
247 (char *)enckey->os->data,11) != 0))
248 {
249 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
250 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
251 return NULL;
252 }
253 if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4)
254 {
255 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
256 goto err;
257 }
258 kp = enckey->enckey->digest->data;
259 if (cb == NULL)
260 cb=EVP_read_pw_string;
261 if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err;
262
263 *pp = p;
264
265 err:
266 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
267 return ret;
268
269 }
270
271static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
272 int (*cb)(), int sgckey)
273 {
274 NETSCAPE_PKEY *pkey=NULL;
275 RSA *ret=NULL;
276 int i,j;
277 unsigned char buf[256];
278 const unsigned char *zz;
279 unsigned char key[EVP_MAX_KEY_LENGTH];
280 EVP_CIPHER_CTX ctx;
281
282 i=cb(buf,256,"Enter Private Key password:",0);
283 if (i != 0)
284 {
285 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
286 goto err;
287 }
288
289 i = strlen((char *)buf);
290 if(sgckey){
291 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
292 memcpy(buf + 16, "SGCKEYSALT", 10);
293 i = 26;
294 }
295
296 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
297 OPENSSL_cleanse(buf,256);
298
299 EVP_CIPHER_CTX_init(&ctx);
300 EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL);
301 EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
302 EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j);
303 EVP_CIPHER_CTX_cleanup(&ctx);
304 os->length=i+j;
305
306 zz=os->data;
307
308 if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
309 {
310 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
311 goto err;
312 }
313
314 zz=pkey->private_key->data;
315 if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
316 {
317 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
318 goto err;
319 }
320err:
321 NETSCAPE_PKEY_free(pkey);
322 return(ret);
323 }
324
325#endif /* OPENSSL_NO_RC4 */
326
327#else /* !OPENSSL_NO_RSA */
328
329# if PEDANTIC
330static void *dummy=&dummy;
331# endif
332
333#endif
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