Give everything prototypes (well, everything that's actually used).
[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 #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
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_NETSCAPE_RSA,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_NETSCAPE_RSA,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_NETSCAPE_RSA,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(buf,256,"Enter Private Key password:",1);
201         if (i != 0)
202                 {
203                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,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);
226 err:
227         NETSCAPE_ENCRYPTED_PKEY_free(enckey);
228         NETSCAPE_PKEY_free(pkey);
229         return(ret);
230         }
231
232
233 RSA *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
240 RSA *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, *kp;
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_NETSCAPE_RSA,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_NETSCAPE_RSA,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_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
266                 goto err;
267         }
268         kp = enckey->enckey->digest->data;
269         if (cb == NULL)
270                 cb=EVP_read_pw_string;
271         if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err;
272
273         *pp = p;
274
275         err:
276         NETSCAPE_ENCRYPTED_PKEY_free(enckey);
277         return ret;
278
279         }
280
281 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
282                           int (*cb)(char *buf, int len, const char *prompt,
283                                     int verify), int sgckey)
284         {
285         NETSCAPE_PKEY *pkey=NULL;
286         RSA *ret=NULL;
287         int i,j;
288         unsigned char buf[256];
289         const unsigned char *zz;
290         unsigned char key[EVP_MAX_KEY_LENGTH];
291         EVP_CIPHER_CTX ctx;
292
293         i=cb(buf,256,"Enter Private Key password:",0);
294         if (i != 0)
295                 {
296                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
297                 goto err;
298                 }
299
300         i = strlen((char *)buf);
301         if(sgckey){
302                 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
303                 memcpy(buf + 16, "SGCKEYSALT", 10);
304                 i = 26;
305         }
306                 
307         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
308         OPENSSL_cleanse(buf,256);
309
310         EVP_CIPHER_CTX_init(&ctx);
311         EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL);
312         EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
313         EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j);
314         EVP_CIPHER_CTX_cleanup(&ctx);
315         os->length=i+j;
316
317         zz=os->data;
318
319         if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
320                 {
321                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
322                 goto err;
323                 }
324                 
325         zz=pkey->private_key->data;
326         if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
327                 {
328                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
329                 goto err;
330                 }
331 err:
332         NETSCAPE_PKEY_free(pkey);
333         return(ret);
334         }
335
336 #endif /* OPENSSL_NO_RC4 */
337
338 #else /* !OPENSSL_NO_RSA */
339
340 # if PEDANTIC
341 static void *dummy=&dummy;
342 # endif
343
344 #endif