text: /**
   * \file openssl.h
   *
   * \brief OpenSSL wrapper (definitions, inline functions).
   *
   *  Copyright (C) 2006-2010, Brainspark B.V.
   *
   *  This file is part of PolarSSL (http://www.polarssl.org)
   *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
   *
   *  All rights reserved.
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License along
   *  with this program; if not, write to the Free Software Foundation, Inc.,
   *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   */
  /*
   * OpenSSL wrapper contributed by David Barett
   */
  #ifndef POLARSSL_OPENSSL_H
  #define POLARSSL_OPENSSL_H
  
  #include "aes.h"
  #include "md5.h"
  #include "rsa.h"
  #include "sha1.h"
  
  #define AES_SIZE                16
  #define AES_BLOCK_SIZE          16
  #define AES_KEY                 aes_context
  #define MD5_CTX                 md5_context
  #define SHA_CTX                 sha1_context
  
  #define SHA1_Init( CTX ) \
          sha1_starts( (CTX) )
  #define SHA1_Update(  CTX, BUF, LEN ) \
          sha1_update( (CTX), (unsigned char *)(BUF), (LEN) )
  #define SHA1_Final( OUT, CTX ) \
          sha1_finish( (CTX), (OUT) )
  
  #define MD5_Init( CTX ) \
          md5_starts( (CTX) )
  #define MD5_Update( CTX, BUF, LEN ) \
          md5_update( (CTX), (unsigned char *)(BUF), (LEN) )
  #define MD5_Final( OUT, CTX ) \
          md5_finish( (CTX), (OUT) )
  
  #define AES_set_encrypt_key( KEY, KEYSIZE, CTX ) \
          aes_setkey_enc( (CTX), (KEY), (KEYSIZE) )
  #define AES_set_decrypt_key( KEY, KEYSIZE, CTX ) \
          aes_setkey_dec( (CTX), (KEY), (KEYSIZE) )
  #define AES_cbc_encrypt( INPUT, OUTPUT, LEN, CTX, IV, MODE ) \
          aes_crypt_cbc( (CTX), (MODE), (LEN), (IV), (INPUT), (OUTPUT) )
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /*
   * RSA stuff follows. TODO: needs cleanup
   */
  inline int __RSA_Passthrough( void *output, void *input, int size )
  {
      memcpy( output, input, size );
      return size;
  }
  
  inline rsa_context* d2i_RSA_PUBKEY( void *ignore, unsigned char **bufptr,
                                      int len )
  {
      unsigned char *buffer = *(unsigned char **) bufptr;
      rsa_context *rsa;
  
      /*
       * Not a general-purpose parser: only parses public key from *exactly*
       *   openssl genrsa -out privkey.pem 512 (or 1024)
       *   openssl rsa -in privkey.pem -out privatekey.der -outform der
       *   openssl rsa -in privkey.pem -out pubkey.der -outform der -pubout
       *
       * TODO: make a general-purpose parse
       */
      if( ignore != 0 || ( len != 94 && len != 162 ) )
          return( 0 );
  
      rsa = (rsa_context *) malloc( sizeof( rsa_rsa ) );
      if( rsa == NULL )
          return( 0 );
  
      memset( rsa, 0, sizeof( rsa_context ) );
  
      if( ( len ==  94 &&
            mpi_read_binary( &rsa->N, &buffer[ 25],  64 ) == 0 &&
            mpi_read_binary( &rsa->E, &buffer[ 91],   3 ) == 0 ) ||
          ( len == 162 &&
            mpi_read_binary( &rsa->N, &buffer[ 29], 128 ) == 0 ) &&
            mpi_read_binary( &rsa->E, &buffer[159],   3 ) == 0 )
      {
          /*
           * key read successfully
           */
          rsa->len = ( mpi_msb( &rsa->N ) + 7 ) >> 3;
          return( rsa );
      }
      else
      {
          memset( rsa, 0, sizeof( rsa_context ) );
          free( rsa );
          return( 0 );
      }
  }
  
  #define RSA                     rsa_context
  #define RSA_PKCS1_PADDING       1 /* ignored; always encrypt with this */
  #define RSA_size( CTX )         (CTX)->len
  #define RSA_free( CTX )         rsa_free( CTX )
  #define ERR_get_error( )        "ERR_get_error() not supported"
  #define RSA_blinding_off( IGNORE )
  
  #define d2i_RSAPrivateKey( a, b, c ) new rsa_context /* TODO: C++ bleh */
  
  inline int RSA_public_decrypt ( int size, unsigned char* input, unsigned char* output, RSA* key, int ignore ) { int outsize=size; if( !rsa_pkcs1_decrypt( key, RSA_PUBLIC,  &outsize, input, output ) ) return outsize; else return -1; }
  inline int RSA_private_decrypt( int size, unsigned char* input, unsigned char* output, RSA* key, int ignore ) { int outsize=size; if( !rsa_pkcs1_decrypt( key, RSA_PRIVATE, &outsize, input, output ) ) return outsize; else return -1; }
  inline int RSA_public_encrypt ( int size, unsigned char* input, unsigned char* output, RSA* key, int ignore ) { if( !rsa_pkcs1_encrypt( key, RSA_PUBLIC,  size, input, output ) ) return RSA_size(key); else return -1; }
  inline int RSA_private_encrypt( int size, unsigned char* input, unsigned char* output, RSA* key, int ignore ) { if( !rsa_pkcs1_encrypt( key, RSA_PRIVATE, size, input, output ) ) return RSA_size(key); else return -1; }
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* openssl.h */
  