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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 NO_RSA
60#include <stdio.h>
61#include "cryptlib.h"
62#include <openssl/rsa.h>
63#include <openssl/objects.h>
64#include <openssl/asn1_mac.h>
65#include <openssl/evp.h>
66#include <openssl/x509.h>
67
68
69#ifndef NO_RC4
70
71typedef struct netscape_pkey_st
72 {
73 ASN1_INTEGER *version;
74 X509_ALGOR *algor;
75 ASN1_OCTET_STRING *private_key;
76 } NETSCAPE_PKEY;
77
78static int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp);
79static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a,unsigned char **pp, long length);
80static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void);
81static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *);
82
83int i2d_Netscape_RSA(RSA *a, unsigned char **pp, int (*cb)())
84{
85 return i2d_RSA_NET(a, pp, cb, 0);
86}
87
88int i2d_RSA_NET(RSA *a, unsigned char **pp, int (*cb)(), int sgckey)
89 {
90 int i,j,l[6];
91 NETSCAPE_PKEY *pkey;
92 unsigned char buf[256],*zz;
93 unsigned char key[EVP_MAX_KEY_LENGTH];
94 EVP_CIPHER_CTX ctx;
95 X509_ALGOR *alg=NULL;
96 ASN1_OCTET_STRING os,os2;
97 M_ASN1_I2D_vars(a);
98
99 if (a == NULL) return(0);
100
101#ifdef WIN32
102 r=r; /* shut the damn compiler up :-) */
103#endif
104
105 os.data=os2.data=NULL;
106 if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
107 if (!ASN1_INTEGER_set(pkey->version,0)) goto err;
108
109 if (pkey->algor->algorithm != NULL)
110 ASN1_OBJECT_free(pkey->algor->algorithm);
111 pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
112 if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
113 pkey->algor->parameter->type=V_ASN1_NULL;
114
115 l[0]=i2d_RSAPrivateKey(a,NULL);
116 pkey->private_key->length=l[0];
117
118 os2.length=i2d_NETSCAPE_PKEY(pkey,NULL);
119 l[1]=i2d_ASN1_OCTET_STRING(&os2,NULL);
120
121 if ((alg=X509_ALGOR_new()) == NULL) goto err;
122 if (alg->algorithm != NULL)
123 ASN1_OBJECT_free(alg->algorithm);
124 alg->algorithm=OBJ_nid2obj(NID_rc4);
125 if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
126 alg->parameter->type=V_ASN1_NULL;
127
128 l[2]=i2d_X509_ALGOR(alg,NULL);
129 l[3]=ASN1_object_size(1,l[2]+l[1],V_ASN1_SEQUENCE);
130
131#ifndef CONST_STRICT
132 os.data=(unsigned char *)"private-key";
133#endif
134 os.length=11;
135 l[4]=i2d_ASN1_OCTET_STRING(&os,NULL);
136
137 l[5]=ASN1_object_size(1,l[4]+l[3],V_ASN1_SEQUENCE);
138
139 if (pp == NULL)
140 {
141 if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
142 if (alg != NULL) X509_ALGOR_free(alg);
143 return(l[5]);
144 }
145
146 if (pkey->private_key->data != NULL)
147 OPENSSL_free(pkey->private_key->data);
148 if ((pkey->private_key->data=(unsigned char *)OPENSSL_malloc(l[0])) == NULL)
149 {
150 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
151 goto err;
152 }
153 zz=pkey->private_key->data;
154 i2d_RSAPrivateKey(a,&zz);
155
156 if ((os2.data=(unsigned char *)OPENSSL_malloc(os2.length)) == NULL)
157 {
158 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
159 goto err;
160 }
161 zz=os2.data;
162 i2d_NETSCAPE_PKEY(pkey,&zz);
163
164 if (cb == NULL)
165 cb=EVP_read_pw_string;
166 i=cb(buf,256,"Enter Private Key password:",1);
167 if (i != 0)
168 {
169 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ);
170 goto err;
171 }
172 i = strlen((char *)buf);
173 /* If the key is used for SGC the algorithm is modified a little. */
174 if(sgckey){
175 EVP_MD_CTX mctx;
176 EVP_DigestInit(&mctx, EVP_md5());
177 EVP_DigestUpdate(&mctx, buf, i);
178 EVP_DigestFinal(&mctx, buf, NULL);
179 memcpy(buf + 16, "SGCKEYSALT", 10);
180 i = 26;
181 }
182
183 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
184 memset(buf,0,256);
185
186 EVP_CIPHER_CTX_init(&ctx);
187 EVP_EncryptInit(&ctx,EVP_rc4(),key,NULL);
188 EVP_EncryptUpdate(&ctx,os2.data,&i,os2.data,os2.length);
189 EVP_EncryptFinal(&ctx,&(os2.data[i]),&j);
190 EVP_CIPHER_CTX_cleanup(&ctx);
191
192 p= *pp;
193 ASN1_put_object(&p,1,l[4]+l[3],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
194 i2d_ASN1_OCTET_STRING(&os,&p);
195 ASN1_put_object(&p,1,l[2]+l[1],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
196 i2d_X509_ALGOR(alg,&p);
197 i2d_ASN1_OCTET_STRING(&os2,&p);
198 ret=l[5];
199err:
200 if (os2.data != NULL) OPENSSL_free(os2.data);
201 if (alg != NULL) X509_ALGOR_free(alg);
202 if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
203 r=r;
204 return(ret);
205 }
206
207
208RSA *d2i_Netscape_RSA(RSA **a, unsigned char **pp, long length, int (*cb)())
209{
210 return d2i_RSA_NET(a, pp, length, cb, 0);
211}
212
213RSA *d2i_RSA_NET(RSA **a, unsigned char **pp, long length, int (*cb)(), int sgckey)
214 {
215 RSA *ret=NULL;
216 ASN1_OCTET_STRING *os=NULL;
217 ASN1_CTX c;
218
219 c.pp=pp;
220 c.error=ASN1_R_DECODING_ERROR;
221
222 M_ASN1_D2I_Init();
223 M_ASN1_D2I_start_sequence();
224 M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
225 if ((os->length != 11) || (strncmp("private-key",
226 (char *)os->data,os->length) != 0))
227 {
228 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
229 M_ASN1_BIT_STRING_free(os);
230 goto err;
231 }
232 M_ASN1_BIT_STRING_free(os);
233 c.q=c.p;
234 if ((ret=d2i_RSA_NET_2(a,&c.p,c.slen,cb, sgckey)) == NULL) goto err;
235 /* Note: some versions of IIS key files use length values that are
236 * too small for the surrounding SEQUENCEs. This following line
237 * effectively disable length checking.
238 */
239 c.slen = 0;
240
241 M_ASN1_D2I_Finish(a,RSA_free,ASN1_F_D2I_NETSCAPE_RSA);
242 }
243
244RSA *d2i_Netscape_RSA_2(RSA **a, unsigned char **pp, long length,
245 int (*cb)())
246{
247 return d2i_RSA_NET_2(a, pp, length, cb, 0);
248}
249
250RSA *d2i_RSA_NET_2(RSA **a, unsigned char **pp, long length,
251 int (*cb)(), int sgckey)
252 {
253 NETSCAPE_PKEY *pkey=NULL;
254 RSA *ret=NULL;
255 int i,j;
256 unsigned char buf[256],*zz;
257 unsigned char key[EVP_MAX_KEY_LENGTH];
258 EVP_CIPHER_CTX ctx;
259 X509_ALGOR *alg=NULL;
260 ASN1_OCTET_STRING *os=NULL;
261 ASN1_CTX c;
262
263 c.error=ERR_R_NESTED_ASN1_ERROR;
264 c.pp=pp;
265
266 M_ASN1_D2I_Init();
267 M_ASN1_D2I_start_sequence();
268 M_ASN1_D2I_get(alg,d2i_X509_ALGOR);
269 if (OBJ_obj2nid(alg->algorithm) != NID_rc4)
270 {
271 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
272 goto err;
273 }
274 M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
275 if (cb == NULL)
276 cb=EVP_read_pw_string;
277 i=cb(buf,256,"Enter Private Key password:",0);
278 if (i != 0)
279 {
280 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
281 goto err;
282 }
283
284 i = strlen((char *)buf);
285 if(sgckey){
286 EVP_MD_CTX mctx;
287 EVP_DigestInit(&mctx, EVP_md5());
288 EVP_DigestUpdate(&mctx, buf, i);
289 EVP_DigestFinal(&mctx, buf, NULL);
290 memcpy(buf + 16, "SGCKEYSALT", 10);
291 i = 26;
292 }
293
294 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
295 memset(buf,0,256);
296
297 EVP_CIPHER_CTX_init(&ctx);
298 EVP_DecryptInit(&ctx,EVP_rc4(),key,NULL);
299 EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
300 EVP_DecryptFinal(&ctx,&(os->data[i]),&j);
301 EVP_CIPHER_CTX_cleanup(&ctx);
302 os->length=i+j;
303
304 zz=os->data;
305
306 if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
307 {
308 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
309 goto err;
310 }
311
312 zz=pkey->private_key->data;
313 if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
314 {
315 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
316 goto err;
317 }
318 if (!asn1_Finish(&c)) goto err;
319 *pp=c.p;
320err:
321 if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
322 if (os != NULL) M_ASN1_BIT_STRING_free(os);
323 if (alg != NULL) X509_ALGOR_free(alg);
324 return(ret);
325 }
326
327static int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp)
328 {
329 M_ASN1_I2D_vars(a);
330
331
332 M_ASN1_I2D_len(a->version, i2d_ASN1_INTEGER);
333 M_ASN1_I2D_len(a->algor, i2d_X509_ALGOR);
334 M_ASN1_I2D_len(a->private_key, i2d_ASN1_OCTET_STRING);
335
336 M_ASN1_I2D_seq_total();
337
338 M_ASN1_I2D_put(a->version, i2d_ASN1_INTEGER);
339 M_ASN1_I2D_put(a->algor, i2d_X509_ALGOR);
340 M_ASN1_I2D_put(a->private_key, i2d_ASN1_OCTET_STRING);
341
342 M_ASN1_I2D_finish();
343 }
344
345static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, unsigned char **pp,
346 long length)
347 {
348 M_ASN1_D2I_vars(a,NETSCAPE_PKEY *,NETSCAPE_PKEY_new);
349
350 M_ASN1_D2I_Init();
351 M_ASN1_D2I_start_sequence();
352 M_ASN1_D2I_get(ret->version,d2i_ASN1_INTEGER);
353 M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
354 M_ASN1_D2I_get(ret->private_key,d2i_ASN1_OCTET_STRING);
355 M_ASN1_D2I_Finish(a,NETSCAPE_PKEY_free,ASN1_F_D2I_NETSCAPE_PKEY);
356 }
357
358static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void)
359 {
360 NETSCAPE_PKEY *ret=NULL;
361 ASN1_CTX c;
362
363 M_ASN1_New_Malloc(ret,NETSCAPE_PKEY);
364 M_ASN1_New(ret->version,M_ASN1_INTEGER_new);
365 M_ASN1_New(ret->algor,X509_ALGOR_new);
366 M_ASN1_New(ret->private_key,M_ASN1_OCTET_STRING_new);
367 return(ret);
368 M_ASN1_New_Error(ASN1_F_NETSCAPE_PKEY_NEW);
369 }
370
371static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *a)
372 {
373 if (a == NULL) return;
374 M_ASN1_INTEGER_free(a->version);
375 X509_ALGOR_free(a->algor);
376 M_ASN1_OCTET_STRING_free(a->private_key);
377 OPENSSL_free(a);
378 }
379
380#endif /* NO_RC4 */
381
382#else /* !NO_RSA */
383
384# if PEDANTIC
385static void *dummy=&dummy;
386# endif
387
388#endif
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