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 OPENSSL_NO_RSA 60#include <stdio.h> 61#include "cryptlib.h" 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 72typedef struct netscape_pkey_st 73 { 74 long version; 75 X509_ALGOR *algor; 76 ASN1_OCTET_STRING *private_key; 77 } NETSCAPE_PKEY; 78 79typedef 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 90ASN1_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 95DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) 96DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY) 97IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) 98 99ASN1_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 105DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) 106DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY) 107IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) 108 109static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, 110 int (*cb)(), int sgckey); 111 112int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, int (*cb)()) 113{ 114 return i2d_RSA_NET(a, pp, cb, 0); 115} 116 117int i2d_RSA_NET(const RSA *a, unsigned char **pp, int (*cb)(), int sgckey) 118 { 119 int i, j, ret = 0; 120 int rsalen, pkeylen, olen; 121 NETSCAPE_PKEY *pkey = NULL; 122 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; 123 unsigned char buf[256],*zz; 124 unsigned char key[EVP_MAX_KEY_LENGTH]; 125 EVP_CIPHER_CTX ctx; 126 127 if (a == NULL) return(0); 128 129 if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err; 130 if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err; 131 pkey->version = 0; 132 133 pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption); 134 if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err; 135 pkey->algor->parameter->type=V_ASN1_NULL; 136 137 rsalen = i2d_RSAPrivateKey(a, NULL); 138 139 /* Fake some octet strings just for the initial length 140 * calculation. 141 */ 142 143 pkey->private_key->length=rsalen; 144 145 pkeylen=i2d_NETSCAPE_PKEY(pkey,NULL); 146 147 enckey->enckey->digest->length = pkeylen; 148 149 enckey->os->length = 11; /* "private-key" */ 150 151 enckey->enckey->algor->algorithm=OBJ_nid2obj(NID_rc4); 152 if ((enckey->enckey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err; 153 enckey->enckey->algor->parameter->type=V_ASN1_NULL; 154 155 if (pp == NULL) 156 { 157 olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL); 158 NETSCAPE_PKEY_free(pkey); 159 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 160 return olen; 161 } 162 163 164 /* Since its RC4 encrypted length is actual length */ 165 if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL) 166 { 167 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE); 168 goto err; 169 } 170 171 pkey->private_key->data = zz; 172 /* Write out private key encoding */ 173 i2d_RSAPrivateKey(a,&zz); 174 175 if ((zz=OPENSSL_malloc(pkeylen)) == NULL) 176 { 177 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE); 178 goto err; 179 } 180 181 if (!ASN1_STRING_set(enckey->os, "private-key", -1)) 182 { 183 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE); 184 goto err; 185 } 186 enckey->enckey->digest->data = zz; 187 i2d_NETSCAPE_PKEY(pkey,&zz); 188 189 /* Wipe the private key encoding */ 190 OPENSSL_cleanse(pkey->private_key->data, rsalen); 191 192 if (cb == NULL) 193 cb=EVP_read_pw_string; 194 i=cb(buf,256,"Enter Private Key password:",1); 195 if (i != 0) 196 { 197 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ); 198 goto err; 199 } 200 i = strlen((char *)buf); 201 /* If the key is used for SGC the algorithm is modified a little. */ 202 if(sgckey) { 203 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); 204 memcpy(buf + 16, "SGCKEYSALT", 10); 205 i = 26; 206 } 207 208 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL); 209 OPENSSL_cleanse(buf,256); 210 211 /* Encrypt private key in place */ 212 zz = enckey->enckey->digest->data; 213 EVP_CIPHER_CTX_init(&ctx); 214 EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL); 215 EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen); 216 EVP_EncryptFinal_ex(&ctx,zz + i,&j); 217 EVP_CIPHER_CTX_cleanup(&ctx); 218 219 ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp); 220err: 221 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 222 NETSCAPE_PKEY_free(pkey); 223 return(ret); 224 } 225 226 227RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, int (*cb)()) 228{ 229 return d2i_RSA_NET(a, pp, length, cb, 0); 230} 231 232RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, int (*cb)(), int sgckey) 233 { 234 RSA *ret=NULL; 235 const unsigned char *p, *kp; 236 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; 237 238 p = *pp; 239 240 enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length); 241 if(!enckey) { 242 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_DECODING_ERROR); 243 return NULL; 244 } 245 246 if ((enckey->os->length != 11) || (strncmp("private-key", 247 (char *)enckey->os->data,11) != 0)) 248 { 249 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING); 250 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 251 return NULL; 252 } 253 if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) 254 { 255 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM); 256 goto err; 257 } 258 kp = enckey->enckey->digest->data; 259 if (cb == NULL) 260 cb=EVP_read_pw_string; 261 if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err; 262 263 *pp = p; 264 265 err: 266 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 267 return ret; 268 269 } 270 271static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, 272 int (*cb)(), int sgckey) 273 { 274 NETSCAPE_PKEY *pkey=NULL; 275 RSA *ret=NULL; 276 int i,j; 277 unsigned char buf[256]; 278 const unsigned char *zz; 279 unsigned char key[EVP_MAX_KEY_LENGTH]; 280 EVP_CIPHER_CTX ctx; 281 282 i=cb(buf,256,"Enter Private Key password:",0); 283 if (i != 0) 284 { 285 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ); 286 goto err; 287 } 288 289 i = strlen((char *)buf); 290 if(sgckey){ 291 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); 292 memcpy(buf + 16, "SGCKEYSALT", 10); 293 i = 26; 294 } 295 296 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL); 297 OPENSSL_cleanse(buf,256); 298 299 EVP_CIPHER_CTX_init(&ctx); 300 EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL); 301 EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length); 302 EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j); 303 EVP_CIPHER_CTX_cleanup(&ctx); 304 os->length=i+j; 305 306 zz=os->data; 307 308 if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL) 309 { 310 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY); 311 goto err; 312 } 313 314 zz=pkey->private_key->data; 315 if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL) 316 { 317 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY); 318 goto err; 319 } 320err: 321 NETSCAPE_PKEY_free(pkey); 322 return(ret); 323 } 324 325#endif /* OPENSSL_NO_RC4 */ 326 327#else /* !OPENSSL_NO_RSA */ 328 329# if PEDANTIC 330static void *dummy=&dummy; 331# endif 332 333#endif 334