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# ifndef OPENSSL_NO_RC4 70 71typedef struct netscape_pkey_st { 72 long version; 73 X509_ALGOR *algor; 74 ASN1_OCTET_STRING *private_key; 75} NETSCAPE_PKEY; 76 77typedef 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; 85 86 87ASN1_BROKEN_SEQUENCE(NETSCAPE_ENCRYPTED_PKEY) = { 88 ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, os, ASN1_OCTET_STRING), 89 ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, enckey, X509_SIG) 90} ASN1_BROKEN_SEQUENCE_END(NETSCAPE_ENCRYPTED_PKEY) 91 92DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) 93DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY) 94IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) 95 96ASN1_SEQUENCE(NETSCAPE_PKEY) = { 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) 100} ASN1_SEQUENCE_END(NETSCAPE_PKEY) 101 102DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) 103DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY) 104IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) 105 106static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, 107 int (*cb) (char *buf, int len, const char *prompt, 108 int verify), int sgckey); 109 110int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, 111 int (*cb) (char *buf, int len, const char *prompt, 112 int verify)) 113{ 114 return i2d_RSA_NET(a, pp, cb, 0); 115} 116 117int i2d_RSA_NET(const RSA *a, unsigned char **pp, 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} 231 232RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, 233 int (*cb) (char *buf, int len, const char *prompt, 234 int verify)) 235{ 236 return d2i_RSA_NET(a, pp, length, cb, 0); 237} 238 239RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, 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} 278 279static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, 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 */ 340 341# if PEDANTIC 342static void *dummy = &dummy; 343# endif 344 345#endif 346