1 /* crypto/asn1/n_pkey.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 70 #ifndef OPENSSL_NO_RC4 71 72 typedef struct netscape_pkey_st 73 { 74 long version; 75 X509_ALGOR *algor; 76 ASN1_OCTET_STRING *private_key; 77 } NETSCAPE_PKEY; 78 79 typedef 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 90 ASN1_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 95 DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) 96 DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY) 97 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) 98 99 ASN1_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) 104 105 DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) 106 DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY) 107 IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) 108 109 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, 110 int (*cb)(char *buf, int len, const char *prompt, 111 int verify), 112 int sgckey); 113 114 int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, 115 int (*cb)(char *buf, int len, const char *prompt, 116 int verify)) 117 { 118 return i2d_RSA_NET(a, pp, cb, 0); 119 } 120 121 int i2d_RSA_NET(const RSA *a, unsigned char **pp, 122 int (*cb)(char *buf, int len, const char *prompt, int verify), 123 int sgckey) 124 { 125 int i, j, ret = 0; 126 int rsalen, pkeylen, olen; 127 NETSCAPE_PKEY *pkey = NULL; 128 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; 129 unsigned char buf[256],*zz; 130 unsigned char key[EVP_MAX_KEY_LENGTH]; 131 EVP_CIPHER_CTX ctx; 132 133 if (a == NULL) return(0); 134 135 if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err; 136 if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err; 137 pkey->version = 0; 138 139 pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption); 140 if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err; 141 pkey->algor->parameter->type=V_ASN1_NULL; 142 143 rsalen = i2d_RSAPrivateKey(a, NULL); 144 145 /* Fake some octet strings just for the initial length 146 * 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) goto err; 159 enckey->enckey->algor->parameter->type=V_ASN1_NULL; 160 161 if (pp == NULL) 162 { 163 olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL); 164 NETSCAPE_PKEY_free(pkey); 165 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 166 return olen; 167 } 168 169 170 /* Since its RC4 encrypted length is actual length */ 171 if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL) 172 { 173 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE); 174 goto err; 175 } 176 177 pkey->private_key->data = zz; 178 /* Write out private key encoding */ 179 i2d_RSAPrivateKey(a,&zz); 180 181 if ((zz=OPENSSL_malloc(pkeylen)) == NULL) 182 { 183 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE); 184 goto err; 185 } 186 187 if (!ASN1_STRING_set(enckey->os, "private-key", -1)) 188 { 189 ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE); 190 goto err; 191 } 192 enckey->enckey->digest->data = zz; 193 i2d_NETSCAPE_PKEY(pkey,&zz); 194 195 /* Wipe the private key encoding */ 196 OPENSSL_cleanse(pkey->private_key->data, rsalen); 197 198 if (cb == NULL) 199 cb=EVP_read_pw_string; 200 i=cb((char *)buf,256,"Enter Private Key password:",1); 201 if (i != 0) 202 { 203 ASN1err(ASN1_F_I2D_RSA_NET,ASN1_R_BAD_PASSWORD_READ); 204 goto err; 205 } 206 i = strlen((char *)buf); 207 /* If the key is used for SGC the algorithm is modified a little. */ 208 if(sgckey) { 209 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); 210 memcpy(buf + 16, "SGCKEYSALT", 10); 211 i = 26; 212 } 213 214 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL); 215 OPENSSL_cleanse(buf,256); 216 217 /* Encrypt private key in place */ 218 zz = enckey->enckey->digest->data; 219 EVP_CIPHER_CTX_init(&ctx); 220 EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL); 221 EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen); 222 EVP_EncryptFinal_ex(&ctx,zz + i,&j); 223 EVP_CIPHER_CTX_cleanup(&ctx); 224 225 ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp); 226 err: 227 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 228 NETSCAPE_PKEY_free(pkey); 229 return(ret); 230 } 231 232 233 RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, 234 int (*cb)(char *buf, int len, const char *prompt, 235 int verify)) 236 { 237 return d2i_RSA_NET(a, pp, length, cb, 0); 238 } 239 240 RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, 241 int (*cb)(char *buf, int len, const char *prompt, int verify), 242 int sgckey) 243 { 244 RSA *ret=NULL; 245 const unsigned char *p; 246 NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; 247 248 p = *pp; 249 250 enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length); 251 if(!enckey) { 252 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_DECODING_ERROR); 253 return NULL; 254 } 255 256 if ((enckey->os->length != 11) || (strncmp("private-key", 257 (char *)enckey->os->data,11) != 0)) 258 { 259 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_PRIVATE_KEY_HEADER_MISSING); 260 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 261 return NULL; 262 } 263 if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) 264 { 265 ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM); 266 goto err; 267 } 268 if (cb == NULL) 269 cb=EVP_read_pw_string; 270 if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err; 271 272 *pp = p; 273 274 err: 275 NETSCAPE_ENCRYPTED_PKEY_free(enckey); 276 return ret; 277 278 } 279 280 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, 281 int (*cb)(char *buf, int len, const char *prompt, 282 int verify), int sgckey) 283 { 284 NETSCAPE_PKEY *pkey=NULL; 285 RSA *ret=NULL; 286 int i,j; 287 unsigned char buf[256]; 288 const unsigned char *zz; 289 unsigned char key[EVP_MAX_KEY_LENGTH]; 290 EVP_CIPHER_CTX ctx; 291 292 i=cb((char *)buf,256,"Enter Private Key password:",0); 293 if (i != 0) 294 { 295 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_BAD_PASSWORD_READ); 296 goto err; 297 } 298 299 i = strlen((char *)buf); 300 if(sgckey){ 301 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); 302 memcpy(buf + 16, "SGCKEYSALT", 10); 303 i = 26; 304 } 305 306 EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL); 307 OPENSSL_cleanse(buf,256); 308 309 EVP_CIPHER_CTX_init(&ctx); 310 EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL); 311 EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length); 312 EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j); 313 EVP_CIPHER_CTX_cleanup(&ctx); 314 os->length=i+j; 315 316 zz=os->data; 317 318 if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL) 319 { 320 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY); 321 goto err; 322 } 323 324 zz=pkey->private_key->data; 325 if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL) 326 { 327 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY); 328 goto err; 329 } 330 err: 331 NETSCAPE_PKEY_free(pkey); 332 return(ret); 333 } 334 335 #endif /* OPENSSL_NO_RC4 */ 336 337 #else /* !OPENSSL_NO_RSA */ 338 339 # if PEDANTIC 340 static void *dummy=&dummy; 341 # endif 342 343 #endif 344
