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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#include <stdio.h>
60#include "cryptlib.h"
61#ifndef OPENSSL_NO_RSA
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)(char *buf, int len, const char *prompt,
111 int verify),
112 int sgckey);
113
114int i2d_Netscape_RSA(const RSA *a, unsigned char **pp,
115 int (*cb)(char *buf, int len, const char *prompt,
116 int verify))
117{
118 return i2d_RSA_NET(a, pp, cb, 0);
119}
120
121int i2d_RSA_NET(const RSA *a, unsigned char **pp,
122 int (*cb)(char *buf, int len, const char *prompt, int verify),
123 int sgckey)
124 {
125 int i, j, ret = 0;
126 int rsalen, pkeylen, olen;
127 NETSCAPE_PKEY *pkey = NULL;
128 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
129 unsigned char buf[256],*zz;
130 unsigned char key[EVP_MAX_KEY_LENGTH];
131 EVP_CIPHER_CTX ctx;
132
133 if (a == NULL) return(0);
134
135 if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
136 if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err;
137 pkey->version = 0;
138
139 pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
140 if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
141 pkey->algor->parameter->type=V_ASN1_NULL;
142
143 rsalen = i2d_RSAPrivateKey(a, NULL);
144
145 /* Fake some octet strings just for the initial length
146 * calculation.
147 */
148
149 pkey->private_key->length=rsalen;
150
151 pkeylen=i2d_NETSCAPE_PKEY(pkey,NULL);
152
153 enckey->enckey->digest->length = pkeylen;
154
155 enckey->os->length = 11; /* "private-key" */
156
157 enckey->enckey->algor->algorithm=OBJ_nid2obj(NID_rc4);
158 if ((enckey->enckey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
159 enckey->enckey->algor->parameter->type=V_ASN1_NULL;
160
161 if (pp == NULL)
162 {
163 olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL);
164 NETSCAPE_PKEY_free(pkey);
165 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
166 return olen;
167 }
168
169
170 /* Since its RC4 encrypted length is actual length */
171 if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL)
172 {
173 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
174 goto err;
175 }
176
177 pkey->private_key->data = zz;
178 /* Write out private key encoding */
179 i2d_RSAPrivateKey(a,&zz);
180
181 if ((zz=OPENSSL_malloc(pkeylen)) == NULL)
182 {
183 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
184 goto err;
185 }
186
187 if (!ASN1_STRING_set(enckey->os, "private-key", -1))
188 {
189 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
190 goto err;
191 }
192 enckey->enckey->digest->data = zz;
193 i2d_NETSCAPE_PKEY(pkey,&zz);
194
195 /* Wipe the private key encoding */
196 OPENSSL_cleanse(pkey->private_key->data, rsalen);
197
198 if (cb == NULL)
199 cb=EVP_read_pw_string;
200 i=cb((char *)buf,256,"Enter Private Key password:",1);
201 if (i != 0)
202 {
203 ASN1err(ASN1_F_I2D_RSA_NET,ASN1_R_BAD_PASSWORD_READ);
204 goto err;
205 }
206 i = strlen((char *)buf);
207 /* If the key is used for SGC the algorithm is modified a little. */
208 if(sgckey) {
209 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
210 memcpy(buf + 16, "SGCKEYSALT", 10);
211 i = 26;
212 }
213
214 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
215 OPENSSL_cleanse(buf,256);
216
217 /* Encrypt private key in place */
218 zz = enckey->enckey->digest->data;
219 EVP_CIPHER_CTX_init(&ctx);
220 EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL);
221 EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen);
222 EVP_EncryptFinal_ex(&ctx,zz + i,&j);
223 EVP_CIPHER_CTX_cleanup(&ctx);
224
225 ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);
226err:
227 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
228 NETSCAPE_PKEY_free(pkey);
229 return(ret);
230 }
231
232
233RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length,
234 int (*cb)(char *buf, int len, const char *prompt,
235 int verify))
236{
237 return d2i_RSA_NET(a, pp, length, cb, 0);
238}
239
240RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length,
241 int (*cb)(char *buf, int len, const char *prompt, int verify),
242 int sgckey)
243 {
244 RSA *ret=NULL;
245 const unsigned char *p;
246 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
247
248 p = *pp;
249
250 enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length);
251 if(!enckey) {
252 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_DECODING_ERROR);
253 return NULL;
254 }
255
256 if ((enckey->os->length != 11) || (strncmp("private-key",
257 (char *)enckey->os->data,11) != 0))
258 {
259 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
260 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
261 return NULL;
262 }
263 if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4)
264 {
265 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
266 goto err;
267 }
268 if (cb == NULL)
269 cb=EVP_read_pw_string;
270 if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err;
271
272 *pp = p;
273
274 err:
275 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
276 return ret;
277
278 }
279
280static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
281 int (*cb)(char *buf, int len, const char *prompt,
282 int verify), int sgckey)
283 {
284 NETSCAPE_PKEY *pkey=NULL;
285 RSA *ret=NULL;
286 int i,j;
287 unsigned char buf[256];
288 const unsigned char *zz;
289 unsigned char key[EVP_MAX_KEY_LENGTH];
290 EVP_CIPHER_CTX ctx;
291
292 i=cb((char *)buf,256,"Enter Private Key password:",0);
293 if (i != 0)
294 {
295 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_BAD_PASSWORD_READ);
296 goto err;
297 }
298
299 i = strlen((char *)buf);
300 if(sgckey){
301 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
302 memcpy(buf + 16, "SGCKEYSALT", 10);
303 i = 26;
304 }
305
306 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
307 OPENSSL_cleanse(buf,256);
308
309 EVP_CIPHER_CTX_init(&ctx);
310 EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL);
311 EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
312 EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j);
313 EVP_CIPHER_CTX_cleanup(&ctx);
314 os->length=i+j;
315
316 zz=os->data;
317
318 if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
319 {
320 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
321 goto err;
322 }
323
324 zz=pkey->private_key->data;
325 if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
326 {
327 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
328 goto err;
329 }
330err:
331 NETSCAPE_PKEY_free(pkey);
332 return(ret);
333 }
334
335#endif /* OPENSSL_NO_RC4 */
336
337#else /* !OPENSSL_NO_RSA */
338
339# if PEDANTIC
340static void *dummy=&dummy;
341# endif
342
343#endif
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