n_pkey.c revision 296465
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; 128 129 if (a == NULL) 130 return (0); 131 132 if ((pkey = NETSCAPE_PKEY_new()) == NULL) 133 goto err; 134 if ((enckey = NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) 135 goto err; 136 pkey->version = 0; 137 138 pkey->algor->algorithm = OBJ_nid2obj(NID_rsaEncryption); 139 if ((pkey->algor->parameter = ASN1_TYPE_new()) == NULL) 140 goto err; 141 pkey->algor->parameter->type = V_ASN1_NULL; 142 143 rsalen = i2d_RSAPrivateKey(a, NULL); 144 145 /* 146 * Fake some octet strings just for the initial length 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) 159 goto err; 160 enckey->enckey->algor->parameter->type = V_ASN1_NULL; 161 162 if (pp == NULL) { 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 /* Since its RC4 encrypted length is actual length */ 170 if ((zz = (unsigned char *)OPENSSL_malloc(rsalen)) == NULL) { 171 ASN1err(ASN1_F_I2D_RSA_NET, ERR_R_MALLOC_FAILURE); 172 goto err; 173 } 174 175 pkey->private_key->data = zz; 176 /* Write out private key encoding */ 177 i2d_RSAPrivateKey(a, &zz); 178 179 if ((zz = OPENSSL_malloc(pkeylen)) == NULL) { 180 ASN1err(ASN1_F_I2D_RSA_NET, ERR_R_MALLOC_FAILURE); 181 goto err; 182 } 183 184 if (!ASN1_STRING_set(enckey->os, "private-key", -1)) { 185 ASN1err(ASN1_F_I2D_RSA_NET, ERR_R_MALLOC_FAILURE); 186 goto err; 187 } 188 enckey->enckey->digest->data = zz; 189 i2d_NETSCAPE_PKEY(pkey, &zz); 190 191 /* Wipe the private key encoding */ 192 OPENSSL_cleanse(pkey->private_key->data, rsalen); 193 194 if (cb == NULL) 195 cb = EVP_read_pw_string; 196 i = cb((char *)buf, 256, "Enter Private Key password:", 1); 197 if (i != 0) { 198 ASN1err(ASN1_F_I2D_RSA_NET, ASN1_R_BAD_PASSWORD_READ); 199 goto err; 200 } 201 i = strlen((char *)buf); 202 /* If the key is used for SGC the algorithm is modified a little. */ 203 if (sgckey) { 204 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); 205 memcpy(buf + 16, "SGCKEYSALT", 10); 206 i = 26; 207 } 208 209 EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i, 1, key, NULL); 210 OPENSSL_cleanse(buf, 256); 211 212 /* Encrypt private key in place */ 213 zz = enckey->enckey->digest->data; 214 EVP_CIPHER_CTX_init(&ctx); 215 EVP_EncryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL); 216 EVP_EncryptUpdate(&ctx, zz, &i, zz, pkeylen); 217 EVP_EncryptFinal_ex(&ctx, zz + i, &j); 218 EVP_CIPHER_CTX_cleanup(&ctx); 219 220 ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp); 221 err: 222 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 223 NETSCAPE_PKEY_free(pkey); 224 return (ret); 225} 226 227RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, 228 int (*cb) (char *buf, int len, const char *prompt, 229 int verify)) 230{ 231 return d2i_RSA_NET(a, pp, length, cb, 0); 232} 233 234RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, 235 int (*cb) (char *buf, int len, const char *prompt, 236 int verify), int sgckey) 237{ 238 RSA *ret = NULL; 239 const unsigned char *p; 240 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; 241 242 p = *pp; 243 244 enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length); 245 if (!enckey) { 246 ASN1err(ASN1_F_D2I_RSA_NET, ASN1_R_DECODING_ERROR); 247 return NULL; 248 } 249 250 if ((enckey->os->length != 11) || (strncmp("private-key", 251 (char *)enckey->os->data, 252 11) != 0)) { 253 ASN1err(ASN1_F_D2I_RSA_NET, ASN1_R_PRIVATE_KEY_HEADER_MISSING); 254 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 255 return NULL; 256 } 257 if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) { 258 ASN1err(ASN1_F_D2I_RSA_NET, ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM); 259 goto err; 260 } 261 if (cb == NULL) 262 cb = EVP_read_pw_string; 263 if ((ret = d2i_RSA_NET_2(a, enckey->enckey->digest, cb, sgckey)) == NULL) 264 goto err; 265 266 *pp = p; 267 268 err: 269 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 270 return ret; 271 272} 273 274static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, 275 int (*cb) (char *buf, int len, const char *prompt, 276 int verify), int sgckey) 277{ 278 NETSCAPE_PKEY *pkey = NULL; 279 RSA *ret = NULL; 280 int i, j; 281 unsigned char buf[256]; 282 const unsigned char *zz; 283 unsigned char key[EVP_MAX_KEY_LENGTH]; 284 EVP_CIPHER_CTX ctx; 285 286 i = cb((char *)buf, 256, "Enter Private Key password:", 0); 287 if (i != 0) { 288 ASN1err(ASN1_F_D2I_RSA_NET_2, ASN1_R_BAD_PASSWORD_READ); 289 goto err; 290 } 291 292 i = strlen((char *)buf); 293 if (sgckey) { 294 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); 295 memcpy(buf + 16, "SGCKEYSALT", 10); 296 i = 26; 297 } 298 299 EVP_BytesToKey(EVP_rc4(), EVP_md5(), NULL, buf, i, 1, key, NULL); 300 OPENSSL_cleanse(buf, 256); 301 302 EVP_CIPHER_CTX_init(&ctx); 303 EVP_DecryptInit_ex(&ctx, EVP_rc4(), NULL, key, NULL); 304 EVP_DecryptUpdate(&ctx, os->data, &i, os->data, os->length); 305 EVP_DecryptFinal_ex(&ctx, &(os->data[i]), &j); 306 EVP_CIPHER_CTX_cleanup(&ctx); 307 os->length = i + j; 308 309 zz = os->data; 310 311 if ((pkey = d2i_NETSCAPE_PKEY(NULL, &zz, os->length)) == NULL) { 312 ASN1err(ASN1_F_D2I_RSA_NET_2, 313 ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY); 314 goto err; 315 } 316 317 zz = pkey->private_key->data; 318 if ((ret = d2i_RSAPrivateKey(a, &zz, pkey->private_key->length)) == NULL) { 319 ASN1err(ASN1_F_D2I_RSA_NET_2, ASN1_R_UNABLE_TO_DECODE_RSA_KEY); 320 goto err; 321 } 322 err: 323 NETSCAPE_PKEY_free(pkey); 324 return (ret); 325} 326 327# endif /* OPENSSL_NO_RC4 */ 328 329#else /* !OPENSSL_NO_RSA */ 330 331# if PEDANTIC 332static void *dummy = &dummy; 333# endif 334 335#endif 336