crypto/openssl-0.9/crypto/asn1/n_pkey.c

   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
  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, *kp;
 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         kp = enckey->enckey->digest->data;
 269         if (cb == NULL)
 270                 cb=EVP_read_pw_string;
 271         if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err;
 272
 273         *pp = p;
 274
 275         err:
 276         NETSCAPE_ENCRYPTED_PKEY_free(enckey);
 277         return ret;
 278
 279         }
 280
 281 static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os,
 282                           int (*cb)(char *buf, int len, const char *prompt,
 283                                     int verify), int sgckey)
 284         {
 285         NETSCAPE_PKEY *pkey=NULL;
 286         RSA *ret=NULL;
 287         int i,j;
 288         unsigned char buf[256];
 289         const unsigned char *zz;
 290         unsigned char key[EVP_MAX_KEY_LENGTH];
 291         EVP_CIPHER_CTX ctx;
 292
 293         i=cb((char *)buf,256,"Enter Private Key password:",0);
 294         if (i != 0)
 295                 {
 296                 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_BAD_PASSWORD_READ);
 297                 goto err;
 298                 }
 299
 300         i = strlen((char *)buf);
 301         if(sgckey){
 302                 EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL);
 303                 memcpy(buf + 16, "SGCKEYSALT", 10);
 304                 i = 26;
 305         }
 306
 307         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
 308         OPENSSL_cleanse(buf,256);
 309
 310         EVP_CIPHER_CTX_init(&ctx);
 311         EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL);
 312         EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
 313         EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j);
 314         EVP_CIPHER_CTX_cleanup(&ctx);
 315         os->length=i+j;
 316
 317         zz=os->data;
 318
 319         if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
 320                 {
 321                 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
 322                 goto err;
 323                 }
 324
 325         zz=pkey->private_key->data;
 326         if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
 327                 {
 328                 ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
 329                 goto err;
 330                 }
 331 err:
 332         NETSCAPE_PKEY_free(pkey);
 333         return(ret);
 334         }
 335
 336 #endif /* OPENSSL_NO_RC4 */
 337
 338 #else /* !OPENSSL_NO_RSA */
 339
 340 # if PEDANTIC
 341 static void *dummy=&dummy;
 342 # endif
 343
 344 #endif