Get rid of ASN1_ITEM_FUNCTIONS dummy function
[openssl.git] / crypto / asn1 / n_pkey.c
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
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 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY)
96
97 ASN1_SEQUENCE(NETSCAPE_PKEY) = {
98         ASN1_SIMPLE(NETSCAPE_PKEY, version, LONG),
99         ASN1_SIMPLE(NETSCAPE_PKEY, algor, X509_ALGOR),
100         ASN1_SIMPLE(NETSCAPE_PKEY, private_key, ASN1_OCTET_STRING)
101 } ASN1_SEQUENCE_END(NETSCAPE_PKEY)
102
103 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY)
104
105 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
106              int (*cb)(), int sgckey);
107
108 int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, int (*cb)())
109 {
110         return i2d_RSA_NET(a, pp, cb, 0);
111 }
112
113 int i2d_RSA_NET(const RSA *a, unsigned char **pp, int (*cb)(), int sgckey)
114         {
115         int i, j, ret = 0;
116         int rsalen, pkeylen, olen;
117         NETSCAPE_PKEY *pkey = NULL;
118         NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
119         unsigned char buf[256],*zz;
120         unsigned char key[EVP_MAX_KEY_LENGTH];
121         EVP_CIPHER_CTX ctx;
122
123         if (a == NULL) return(0);
124
125         if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
126         if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err;
127         pkey->version = 0;
128
129         pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
130         if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
131         pkey->algor->parameter->type=V_ASN1_NULL;
132
133         rsalen = i2d_RSAPrivateKey(a, NULL);
134
135         /* Fake some octet strings just for the initial length
136          * calculation.
137          */
138
139         pkey->private_key->length=rsalen;
140
141         pkeylen=i2d_NETSCAPE_PKEY(pkey,NULL);
142
143         enckey->enckey->digest->length = pkeylen;
144
145         enckey->os->length = 11;        /* "private-key" */
146
147         enckey->enckey->algor->algorithm=OBJ_nid2obj(NID_rc4);
148         if ((enckey->enckey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
149         enckey->enckey->algor->parameter->type=V_ASN1_NULL;
150
151         if (pp == NULL)
152                 {
153                 olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL);
154                 NETSCAPE_PKEY_free(pkey);
155                 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
156                 return olen;
157                 }
158
159
160         /* Since its RC4 encrypted length is actual length */
161         if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL)
162                 {
163                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
164                 goto err;
165                 }
166
167         pkey->private_key->data = zz;
168         /* Write out private key encoding */
169         i2d_RSAPrivateKey(a,&zz);
170
171         if ((zz=OPENSSL_malloc(pkeylen)) == NULL)
172                 {
173                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
174                 goto err;
175                 }
176
177         if (!ASN1_STRING_set(enckey->os, "private-key", -1)) 
178                 {
179                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
180                 goto err;
181                 }
182         enckey->enckey->digest->data = zz;
183         i2d_NETSCAPE_PKEY(pkey,&zz);
184
185         /* Wipe the private key encoding */
186         memset(pkey->private_key->data, 0, rsalen);
187                 
188         if (cb == NULL)
189                 cb=EVP_read_pw_string;
190         i=cb(buf,256,"Enter Private Key password:",1);
191         if (i != 0)
192                 {
193                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ);
194                 goto err;
195                 }
196         i = strlen((char *)buf);
197         /* If the key is used for SGC the algorithm is modified a little. */
198         if(sgckey) {
199                 EVP_Digest(buf, i, buf, NULL, EVP_md5());
200                 memcpy(buf + 16, "SGCKEYSALT", 10);
201                 i = 26;
202         }
203
204         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
205         memset(buf,0,256);
206
207         /* Encrypt private key in place */
208         zz = enckey->enckey->digest->data;
209         EVP_CIPHER_CTX_init(&ctx);
210         EVP_EncryptInit(&ctx,EVP_rc4(),key,NULL);
211         EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen);
212         EVP_EncryptFinal(&ctx,zz + i,&j);
213         EVP_CIPHER_CTX_cleanup(&ctx);
214
215         ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp);
216 err:
217         NETSCAPE_ENCRYPTED_PKEY_free(enckey);
218         NETSCAPE_PKEY_free(pkey);
219         return(ret);
220         }
221
222
223 RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, int (*cb)())
224 {
225         return d2i_RSA_NET(a, pp, length, cb, 0);
226 }
227
228 RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, int (*cb)(), int sgckey)
229         {
230         RSA *ret=NULL;
231         const unsigned char *p, *kp;
232         NETSCAPE_ENCRYPTED_PKEY *enckey = NULL;
233
234         p = *pp;
235
236         enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length);
237         if(!enckey) {
238                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_DECODING_ERROR);
239                 return NULL;
240         }
241
242         if ((enckey->os->length != 11) || (strncmp("private-key",
243                 (char *)enckey->os->data,11) != 0))
244                 {
245                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
246                 NETSCAPE_ENCRYPTED_PKEY_free(enckey);
247                 return NULL;
248                 }
249         if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4)
250                 {
251                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
252                 goto err;
253         }
254         kp = enckey->enckey->digest->data;
255         if (cb == NULL)
256                 cb=EVP_read_pw_string;
257         if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err;
258
259         *pp = p;
260
261         err:
262         NETSCAPE_ENCRYPTED_PKEY_free(enckey);
263         return ret;
264
265         }
266
267 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
268              int (*cb)(), int sgckey)
269         {
270         NETSCAPE_PKEY *pkey=NULL;
271         RSA *ret=NULL;
272         int i,j;
273         unsigned char buf[256];
274         const unsigned char *zz;
275         unsigned char key[EVP_MAX_KEY_LENGTH];
276         EVP_CIPHER_CTX ctx;
277
278         i=cb(buf,256,"Enter Private Key password:",0);
279         if (i != 0)
280                 {
281                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
282                 goto err;
283                 }
284
285         i = strlen((char *)buf);
286         if(sgckey){
287                 EVP_Digest(buf, i, buf, NULL, EVP_md5());
288                 memcpy(buf + 16, "SGCKEYSALT", 10);
289                 i = 26;
290         }
291                 
292         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
293         memset(buf,0,256);
294
295         EVP_CIPHER_CTX_init(&ctx);
296         EVP_DecryptInit(&ctx,EVP_rc4(),key,NULL);
297         EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
298         EVP_DecryptFinal(&ctx,&(os->data[i]),&j);
299         EVP_CIPHER_CTX_cleanup(&ctx);
300         os->length=i+j;
301
302         zz=os->data;
303
304         if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
305                 {
306                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
307                 goto err;
308                 }
309                 
310         zz=pkey->private_key->data;
311         if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
312                 {
313                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
314                 goto err;
315                 }
316 err:
317         NETSCAPE_PKEY_free(pkey);
318         return(ret);
319         }
320
321 #endif /* OPENSSL_NO_RC4 */
322
323 #else /* !OPENSSL_NO_RSA */
324
325 # if PEDANTIC
326 static void *dummy=&dummy;
327 # endif
328
329 #endif