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56276539 SS |
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. | |
9eaaad39 | 8 | * |
56276539 SS |
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). | |
9eaaad39 | 15 | * |
56276539 SS |
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. | |
9eaaad39 | 22 | * |
56276539 SS |
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 :-). | |
9eaaad39 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
56276539 SS |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
9eaaad39 | 40 | * |
56276539 SS |
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. | |
9eaaad39 | 52 | * |
56276539 SS |
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 | |
9eaaad39 SW |
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 | # ifndef OPENSSL_NO_RC4 | |
70 | ||
71 | typedef struct netscape_pkey_st { | |
72 | long version; | |
73 | X509_ALGOR *algor; | |
74 | ASN1_OCTET_STRING *private_key; | |
75 | } NETSCAPE_PKEY; | |
76 | ||
77 | typedef struct netscape_encrypted_pkey_st { | |
78 | ASN1_OCTET_STRING *os; | |
79 | /* | |
80 | * This is the same structure as DigestInfo so use it: although this | |
81 | * isn't really anything to do with digests. | |
82 | */ | |
83 | X509_SIG *enckey; | |
84 | } NETSCAPE_ENCRYPTED_PKEY; | |
56276539 SS |
85 | |
86 | ||
87 | ASN1_BROKEN_SEQUENCE(NETSCAPE_ENCRYPTED_PKEY) = { | |
9eaaad39 SW |
88 | ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, os, ASN1_OCTET_STRING), |
89 | ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, enckey, X509_SIG) | |
56276539 SS |
90 | } ASN1_BROKEN_SEQUENCE_END(NETSCAPE_ENCRYPTED_PKEY) |
91 | ||
92 | DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) | |
93 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY) | |
94 | IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) | |
95 | ||
96 | ASN1_SEQUENCE(NETSCAPE_PKEY) = { | |
9eaaad39 SW |
97 | ASN1_SIMPLE(NETSCAPE_PKEY, version, LONG), |
98 | ASN1_SIMPLE(NETSCAPE_PKEY, algor, X509_ALGOR), | |
99 | ASN1_SIMPLE(NETSCAPE_PKEY, private_key, ASN1_OCTET_STRING) | |
56276539 SS |
100 | } ASN1_SEQUENCE_END(NETSCAPE_PKEY) |
101 | ||
102 | DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) | |
103 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY) | |
104 | IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) | |
105 | ||
106 | static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, | |
9eaaad39 SW |
107 | int (*cb) (char *buf, int len, const char *prompt, |
108 | int verify), int sgckey); | |
56276539 SS |
109 | |
110 | int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, | |
9eaaad39 SW |
111 | int (*cb) (char *buf, int len, const char *prompt, |
112 | int verify)) | |
56276539 | 113 | { |
9eaaad39 | 114 | return i2d_RSA_NET(a, pp, cb, 0); |
56276539 SS |
115 | } |
116 | ||
117 | int i2d_RSA_NET(const RSA *a, unsigned char **pp, | |
9eaaad39 SW |
118 | int (*cb) (char *buf, int len, const char *prompt, |
119 | int verify), int sgckey) | |
120 | { | |
121 | int i, j, ret = 0; | |
122 | int rsalen, pkeylen, olen; | |
123 | NETSCAPE_PKEY *pkey = NULL; | |
124 | NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; | |
125 | unsigned char buf[256], *zz; | |
126 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
127 | EVP_CIPHER_CTX ctx; | |
128 | EVP_CIPHER_CTX_init(&ctx); | |
129 | ||
130 | if (a == NULL) | |
131 | return (0); | |
132 | ||
133 | if ((pkey = NETSCAPE_PKEY_new()) == NULL) | |
134 | goto err; | |
135 | if ((enckey = NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) | |
136 | goto err; | |
137 | pkey->version = 0; | |
138 | ||
139 | pkey->algor->algorithm = OBJ_nid2obj(NID_rsaEncryption); | |
140 | if ((pkey->algor->parameter = ASN1_TYPE_new()) == NULL) | |
141 | goto err; | |
142 | pkey->algor->parameter->type = V_ASN1_NULL; | |
143 | ||
144 | rsalen = i2d_RSAPrivateKey(a, NULL); | |
145 | ||
146 | /* | |
147 | * Fake some octet strings just for the initial length 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) | |
160 | goto err; | |
161 | enckey->enckey->algor->parameter->type = V_ASN1_NULL; | |
162 | ||
163 | if (pp == NULL) { | |
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 | /* Since its RC4 encrypted length is actual length */ | |
171 | if ((zz = (unsigned char *)OPENSSL_malloc(rsalen)) == NULL) { | |
172 | ASN1err(ASN1_F_I2D_RSA_NET, ERR_R_MALLOC_FAILURE); | |
173 | goto err; | |
174 | } | |
175 | ||
176 | pkey->private_key->data = zz; | |
177 | /* Write out private key encoding */ | |
178 | i2d_RSAPrivateKey(a, &zz); | |
179 | ||
180 | if ((zz = OPENSSL_malloc(pkeylen)) == NULL) { | |
181 | ASN1err(ASN1_F_I2D_RSA_NET, ERR_R_MALLOC_FAILURE); | |
182 | goto err; | |
183 | } | |
184 | ||
185 | if (!ASN1_STRING_set(enckey->os, "private-key", -1)) { | |
186 | ASN1err(ASN1_F_I2D_RSA_NET, ERR_R_MALLOC_FAILURE); | |
187 | goto err; | |
188 | } | |
189 | enckey->enckey->digest->data = zz; | |
190 | i2d_NETSCAPE_PKEY(pkey, &zz); | |
191 | ||
192 | /* Wipe the private key encoding */ | |
193 | OPENSSL_cleanse(pkey->private_key->data, rsalen); | |
194 | ||
195 | if (cb == NULL) | |
196 | cb = EVP_read_pw_string; | |
197 | i = cb((char *)buf, 256, "Enter Private Key password:", 1); | |
198 | if (i != 0) { | |
199 | ASN1err(ASN1_F_I2D_RSA_NET, ASN1_R_BAD_PASSWORD_READ); | |
200 | goto err; | |
201 | } | |
202 | i = strlen((char *)buf); | |
203 | /* If the key is used for SGC the algorithm is modified a little. */ | |
204 | if (sgckey) { | |
205 | if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL)) | |
206 | goto err; | |
207 | memcpy(buf + 16, "SGCKEYSALT", 10); | |
208 | i = 26; | |
209 | } | |
210 | ||
211 | if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i, 1, key, NULL)) | |
212 | goto err; | |
213 | OPENSSL_cleanse(buf, 256); | |
214 | ||
215 | /* Encrypt private key in place */ | |
216 | zz = enckey->enckey->digest->data; | |
217 | if (!EVP_EncryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL)) | |
218 | goto err; | |
219 | if (!EVP_EncryptUpdate(&ctx, zz, &i, zz, pkeylen)) | |
220 | goto err; | |
221 | if (!EVP_EncryptFinal_ex(&ctx, zz + i, &j)) | |
222 | goto err; | |
223 | ||
224 | ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp); | |
225 | err: | |
226 | EVP_CIPHER_CTX_cleanup(&ctx); | |
227 | NETSCAPE_ENCRYPTED_PKEY_free(enckey); | |
228 | NETSCAPE_PKEY_free(pkey); | |
229 | return (ret); | |
230 | } | |
56276539 SS |
231 | |
232 | RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, | |
9eaaad39 SW |
233 | int (*cb) (char *buf, int len, const char *prompt, |
234 | int verify)) | |
56276539 | 235 | { |
9eaaad39 | 236 | return d2i_RSA_NET(a, pp, length, cb, 0); |
56276539 SS |
237 | } |
238 | ||
239 | RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, | |
9eaaad39 SW |
240 | int (*cb) (char *buf, int len, const char *prompt, |
241 | int verify), int sgckey) | |
242 | { | |
243 | RSA *ret = NULL; | |
244 | const unsigned char *p; | |
245 | NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; | |
246 | ||
247 | p = *pp; | |
248 | ||
249 | enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length); | |
250 | if (!enckey) { | |
251 | ASN1err(ASN1_F_D2I_RSA_NET, ASN1_R_DECODING_ERROR); | |
252 | return NULL; | |
253 | } | |
254 | ||
255 | if ((enckey->os->length != 11) || (strncmp("private-key", | |
256 | (char *)enckey->os->data, | |
257 | 11) != 0)) { | |
258 | ASN1err(ASN1_F_D2I_RSA_NET, ASN1_R_PRIVATE_KEY_HEADER_MISSING); | |
259 | NETSCAPE_ENCRYPTED_PKEY_free(enckey); | |
260 | return NULL; | |
261 | } | |
262 | if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) { | |
263 | ASN1err(ASN1_F_D2I_RSA_NET, ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM); | |
264 | goto err; | |
265 | } | |
266 | if (cb == NULL) | |
267 | cb = EVP_read_pw_string; | |
268 | if ((ret = d2i_RSA_NET_2(a, enckey->enckey->digest, cb, sgckey)) == NULL) | |
269 | goto err; | |
270 | ||
271 | *pp = p; | |
272 | ||
273 | err: | |
274 | NETSCAPE_ENCRYPTED_PKEY_free(enckey); | |
275 | return ret; | |
276 | ||
277 | } | |
56276539 SS |
278 | |
279 | static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, | |
9eaaad39 SW |
280 | int (*cb) (char *buf, int len, const char *prompt, |
281 | int verify), int sgckey) | |
282 | { | |
283 | NETSCAPE_PKEY *pkey = NULL; | |
284 | RSA *ret = NULL; | |
285 | int i, j; | |
286 | unsigned char buf[256]; | |
287 | const unsigned char *zz; | |
288 | unsigned char key[EVP_MAX_KEY_LENGTH]; | |
289 | EVP_CIPHER_CTX ctx; | |
290 | EVP_CIPHER_CTX_init(&ctx); | |
291 | ||
292 | i = cb((char *)buf, 256, "Enter Private Key password:", 0); | |
293 | if (i != 0) { | |
294 | ASN1err(ASN1_F_D2I_RSA_NET_2, ASN1_R_BAD_PASSWORD_READ); | |
295 | goto err; | |
296 | } | |
297 | ||
298 | i = strlen((char *)buf); | |
299 | if (sgckey) { | |
300 | if (!EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL)) | |
301 | goto err; | |
302 | memcpy(buf + 16, "SGCKEYSALT", 10); | |
303 | i = 26; | |
304 | } | |
305 | ||
306 | if (!EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i, 1, key, NULL)) | |
307 | goto err; | |
308 | OPENSSL_cleanse(buf, 256); | |
309 | ||
310 | if (!EVP_DecryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL)) | |
311 | goto err; | |
312 | if (!EVP_DecryptUpdate(&ctx, os->data, &i, os->data, os->length)) | |
313 | goto err; | |
314 | if (!EVP_DecryptFinal_ex(&ctx, &(os->data[i]), &j)) | |
315 | goto err; | |
316 | os->length = i + j; | |
317 | ||
318 | zz = os->data; | |
319 | ||
320 | if ((pkey = d2i_NETSCAPE_PKEY(NULL, &zz, os->length)) == NULL) { | |
321 | ASN1err(ASN1_F_D2I_RSA_NET_2, | |
322 | ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY); | |
323 | goto err; | |
324 | } | |
325 | ||
326 | zz = pkey->private_key->data; | |
327 | if ((ret = d2i_RSAPrivateKey(a, &zz, pkey->private_key->length)) == NULL) { | |
328 | ASN1err(ASN1_F_D2I_RSA_NET_2, ASN1_R_UNABLE_TO_DECODE_RSA_KEY); | |
329 | goto err; | |
330 | } | |
331 | err: | |
332 | EVP_CIPHER_CTX_cleanup(&ctx); | |
333 | NETSCAPE_PKEY_free(pkey); | |
334 | return (ret); | |
335 | } | |
336 | ||
337 | # endif /* OPENSSL_NO_RC4 */ | |
338 | ||
339 | #else /* !OPENSSL_NO_RSA */ | |
56276539 SS |
340 | |
341 | # if PEDANTIC | |
9eaaad39 | 342 | static void *dummy = &dummy; |
56276539 SS |
343 | # endif |
344 | ||
345 | #endif |