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
72 typedef struct netscape_pkey_st
73 {
74 long version;
75 X509_ALGOR *algor;
76 ASN1_OCTET_STRING *private_key;
77 } NETSCAPE_PKEY;
78
79 typedef 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
90 ASN1_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
95 DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)
96 DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY)
97 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)
98
99 ASN1_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
105 DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)
106 DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY)
107 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)
108
109 static 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
114 int 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
121 int 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 EVP_CIPHER_CTX_init(&ctx);
133
134 if (a == NULL) return(0);
135
136 if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
137 if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err;
138 pkey->version = 0;
139
140 pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
141 if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
142 pkey->algor->parameter->type=V_ASN1_NULL;
143
144 rsalen = i2d_RSAPrivateKey(a, NULL);
145
146 /* Fake some octet strings just for the initial length
147 * calculation.
148 */
149
150 pkey->private_key->length=rsalen;
151
152 pkeylen=i2d_NETSCAPE_PKEY(pkey,NULL);
153
154 enckey->enckey->digest->length = pkeylen;
155
156 enckey->os->length = 11; /* "private-key" */
157
158 enckey->enckey->algor->algorithm=OBJ_nid2obj(NID_rc4);
159 if ((enckey->enckey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
160 enckey->enckey->algor->parameter->type=V_ASN1_NULL;
161
162 if (pp == NULL)
163 {
164 olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL);
165 NETSCAPE_PKEY_free(pkey);
166 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
167 return olen;
168 }
169
170
171 /* Since its RC4 encrypted length is actual length */
172 if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL)
173 {
174 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
175 goto err;
176 }
177
178 pkey->private_key->data = zz;
179 /* Write out private key encoding */
180 i2d_RSAPrivateKey(a,&zz);
181
182 if ((zz=OPENSSL_malloc(pkeylen)) == NULL)
183 {
184 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
185 goto err;
186 }
187
188 if (!ASN1_STRING_set(enckey->os, "private-key", -1))
189 {
190 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE);
191 goto err;
192 }
193 enckey->enckey->digest->data = zz;
194 i2d_NETSCAPE_PKEY(pkey,&zz);
195
196 /* Wipe the private key encoding */
197 OPENSSL_cleanse(pkey->private_key->data, rsalen);
198
199 if (cb == NULL)
200 cb=EVP_read_pw_string;
201 i=cb((char *)buf,256,"Enter Private Key password:",1);
202 if (i != 0)
203 {
204 ASN1err(ASN1_F_I2D_RSA_NET,ASN1_R_BAD_PASSWORD_READ);
205 goto err;
206 }
207 i = strlen((char *)buf);
208 /* If the key is used for SGC the algorithm is modified a little. */
209 if(sgckey) {
210 if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL))
211 goto err;
212 memcpy(buf + 16, "SGCKEYSALT", 10);
213 i = 26;
214 }
215
216 if (!EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL))
217 goto err;
218 OPENSSL_cleanse(buf,256);
219
220 /* Encrypt private key in place */
221 zz = enckey->enckey->digest->data;
222 if (!EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL))
223 goto err;
224 if (!EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen))
225 goto err;
226 if (!EVP_EncryptFinal_ex(&ctx,zz + i,&j))
227 goto err;
228
229 ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);
230 err:
231 EVP_CIPHER_CTX_cleanup(&ctx);
232 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
233 NETSCAPE_PKEY_free(pkey);
234 return(ret);
235 }
236
237
238 RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length,
239 int (*cb)(char *buf, int len, const char *prompt,
240 int verify))
241 {
242 return d2i_RSA_NET(a, pp, length, cb, 0);
243 }
244
245 RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length,
246 int (*cb)(char *buf, int len, const char *prompt, int verify),
247 int sgckey)
248 {
249 RSA *ret=NULL;
250 const unsigned char *p;
251 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
252
253 p = *pp;
254
255 enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length);
256 if(!enckey) {
257 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_DECODING_ERROR);
258 return NULL;
259 }
260
261 if ((enckey->os->length != 11) || (strncmp("private-key",
262 (char *)enckey->os->data,11) != 0))
263 {
264 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
265 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
266 return NULL;
267 }
268 if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4)
269 {
270 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
271 goto err;
272 }
273 if (cb == NULL)
274 cb=EVP_read_pw_string;
275 if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err;
276
277 *pp = p;
278
279 err:
280 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
281 return ret;
282
283 }
284
285 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
286 int (*cb)(char *buf, int len, const char *prompt,
287 int verify), int sgckey)
288 {
289 NETSCAPE_PKEY *pkey=NULL;
290 RSA *ret=NULL;
291 int i,j;
292 unsigned char buf[256];
293 const unsigned char *zz;
294 unsigned char key[EVP_MAX_KEY_LENGTH];
295 EVP_CIPHER_CTX ctx;
296 EVP_CIPHER_CTX_init(&ctx);
297
298 i=cb((char *)buf,256,"Enter Private Key password:",0);
299 if (i != 0)
300 {
301 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_BAD_PASSWORD_READ);
302 goto err;
303 }
304
305 i = strlen((char *)buf);
306 if(sgckey){
307 if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL))
308 goto err;
309 memcpy(buf + 16, "SGCKEYSALT", 10);
310 i = 26;
311 }
312
313 if (!EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL))
314 goto err;
315 OPENSSL_cleanse(buf,256);
316
317 if (!EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL))
318 goto err;
319 if (!EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length))
320 goto err;
321 if (!EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j))
322 goto err;
323 os->length=i+j;
324
325 zz=os->data;
326
327 if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
328 {
329 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
330 goto err;
331 }
332
333 zz=pkey->private_key->data;
334 if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
335 {
336 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
337 goto err;
338 }
339 err:
340 EVP_CIPHER_CTX_cleanup(&ctx);
341 NETSCAPE_PKEY_free(pkey);
342 return(ret);
343 }
344
345 #endif /* OPENSSL_NO_RC4 */
346
347 #else /* !OPENSSL_NO_RSA */
348
349 # if PEDANTIC
350 static void *dummy=&dummy;
351 # endif
352
353 #endif