polserver/pol-core/pol/crypt/crypt.cpp

#include "crypt.h"
#include "../../clib/passert.h"
#include "../../plib/uconst.h"
#include "blowfish.h"
#include "cryptbase.h"
#include "logincrypt.h"
#include "md5.h"
#include "twofish.h"

// NOCRYPT

namespace Pol::Crypt
{
CCryptNoCrypt::CCryptNoCrypt() : CCryptBase() {}

int CCryptNoCrypt::Receive( void* buffer, int max_expected, SOCKET socket )
{
  return recv( socket, (char*)buffer, max_expected, 0 );
}

void CCryptNoCrypt::Init( void* pvSeed, int type )
{
  // Nocrypt doesnt need to Initialize anything.
  (void)pvSeed;
  (void)type;
}

// BLOWFISH

CCryptBlowfish::CCryptBlowfish() : CCryptBaseCrypt(), bfish() {}

CCryptBlowfish::CCryptBlowfish( unsigned int masterKey1, unsigned int masterKey2 )
{
  SetMasterKeys( masterKey1, masterKey2 );
}

int CCryptBlowfish::Receive( void* buffer, int max_expected, SOCKET socket )
{
  passert_always( max_expected >= 0 );
  passert_always( MAXBUFFER > max_expected );
  int count = recv( socket, (char*)encrypted_data, max_expected, 0 );
  if ( count > 0 )
  {
    passert( count <= max_expected );
    Decrypt( encrypted_data, buffer, count );
  }
  return count;
}

void CCryptBlowfish::Init( void* pvSeed, int type )
{
  unsigned char* pSeed = (unsigned char*)pvSeed;

  lcrypt.Init( pSeed, m_masterKey[0], m_masterKey[1] );
  bfish.Init();

  m_type = type;
}

void CCryptBlowfish::Decrypt( void* pvIn, void* pvOut, int len )
{
  unsigned char* pIn = (unsigned char*)pvIn;
  unsigned char* pOut = (unsigned char*)pvOut;

  if ( m_type == CCryptBase::typeAuto )
  {
    if ( ( *pIn ^ (unsigned char)lcrypt.lkey[0] ) == CRYPT_AUTO_VALUE )
      m_type = CCryptBase::typeLogin;
    else
      m_type = CCryptBase::typeGame;
  }

  if ( m_type == CCryptBase::typeLogin )
  {
    lcrypt.Decrypt( pIn, pOut, len );
  }
  else
  {
    bfish.Decrypt( pIn, pOut, len );
  }
}

// BLOWFISH OLD

CCryptBlowfishOld::CCryptBlowfishOld() : CCryptBlowfish() {}

CCryptBlowfishOld::CCryptBlowfishOld( unsigned int masterKey1, unsigned int masterKey2 )
{
  SetMasterKeys( masterKey1, masterKey2 );
}

void CCryptBlowfishOld::Decrypt( void* pvIn, void* pvOut, int len )
{
  unsigned char* pIn = (unsigned char*)pvIn;
  unsigned char* pOut = (unsigned char*)pvOut;

  if ( m_type == CCryptBase::typeAuto )
  {
    if ( ( *pIn ^ (unsigned char)lcrypt.lkey[0] ) == CRYPT_AUTO_VALUE )
      m_type = CCryptBase::typeLogin;
    else
      m_type = CCryptBase::typeGame;
  }

  if ( m_type == CCryptBase::typeLogin )
  {
    lcrypt.Decrypt_Old( pIn, pOut, len );
  }
  else
  {
    bfish.Decrypt( pIn, pOut, len );
  }
}

// BLOWFISH 1.25.36

CCrypt12536::CCrypt12536() : CCryptBlowfish() {}

CCrypt12536::CCrypt12536( unsigned int masterKey1, unsigned int masterKey2 )
{
  SetMasterKeys( masterKey1, masterKey2 );
}

void CCrypt12536::Decrypt( void* pvIn, void* pvOut, int len )
{
  unsigned char* pIn = (unsigned char*)pvIn;
  unsigned char* pOut = (unsigned char*)pvOut;

  if ( m_type == CCryptBase::typeAuto )
  {
    if ( ( *pIn ^ (unsigned char)lcrypt.lkey[0] ) == CRYPT_AUTO_VALUE )
      m_type = CCryptBase::typeLogin;
    else
      m_type = CCryptBase::typeGame;
  }

  if ( m_type == CCryptBase::typeLogin )
  {
    lcrypt.Decrypt_1_25_36( pIn, pOut, len );
  }
  else
  {
    bfish.Decrypt( pIn, pOut, len );
  }
}

// BLOWFISH + TWOFISH

CCryptBlowfishTwofish::CCryptBlowfishTwofish() : CCryptBaseCrypt(), bfish(), tfish() {}

CCryptBlowfishTwofish::CCryptBlowfishTwofish( unsigned int masterKey1, unsigned int masterKey2 )
{
  SetMasterKeys( masterKey1, masterKey2 );
}

int CCryptBlowfishTwofish::Receive( void* buffer, int max_expected, SOCKET socket )
{
  passert_always( max_expected >= 0 );
  passert_always( MAXBUFFER > max_expected );
  int count = recv( socket, (char*)encrypted_data, max_expected, 0 );
  if ( count > 0 )
  {
    passert( count <= max_expected );
    Decrypt( encrypted_data, buffer, count );
  }
  return count;
}

void CCryptBlowfishTwofish::Init( void* pvSeed, int type )
{
  unsigned char* pSeed = (unsigned char*)pvSeed;

  lcrypt.Init( pSeed, m_masterKey[0], m_masterKey[1] );
  tfish.Init( pSeed );
  bfish.Init();

  m_type = type;
}

void CCryptBlowfishTwofish::Decrypt( void* pvIn, void* pvOut, int len )
{
  unsigned char* pIn = (unsigned char*)pvIn;
  unsigned char* pOut = (unsigned char*)pvOut;

  if ( m_type == CCryptBase::typeAuto )
  {
    if ( ( *pIn ^ (unsigned char)lcrypt.lkey[0] ) == CRYPT_AUTO_VALUE )
      m_type = CCryptBase::typeLogin;
    else
      m_type = CCryptBase::typeGame;
  }

  if ( m_type == CCryptBase::typeLogin )
  {
    lcrypt.Decrypt( pIn, pOut, len );
  }
  else
  {
    tfish.Decrypt( pIn, pOut, len );
    bfish.Decrypt( pOut, pOut, len );
  }
}

// TWOFISH

CCryptTwofish::CCryptTwofish() : CCryptBaseCrypt(), tfish(), md5() {}

CCryptTwofish::CCryptTwofish( unsigned int masterKey1, unsigned int masterKey2 )
{
  SetMasterKeys( masterKey1, masterKey2 );
}

int CCryptTwofish::Receive( void* buffer, int max_expected, SOCKET socket )
{
  passert_always( max_expected >= 0 );
  passert_always( MAXBUFFER > max_expected );
  int count = recv( socket, (char*)encrypted_data, max_expected, 0 );
  if ( count > 0 )
  {
    passert( count <= max_expected );
    Decrypt( encrypted_data, buffer, count );
  }
  return count;
}

void CCryptTwofish::Init( void* pvSeed, int type )
{
  unsigned char* pSeed = (unsigned char*)pvSeed;

  lcrypt.Init( pSeed, m_masterKey[0], m_masterKey[1] );
  tfish.Init( pSeed );
  md5.Init( tfish.subData3, 256 );

  m_type = type;
}

void CCryptTwofish::Encrypt( void* pvIn, void* pvOut, int len )
{
  unsigned char* pIn = (unsigned char*)pvIn;
  unsigned char* pOut = (unsigned char*)pvOut;

  md5.Encrypt( pIn, pOut, len );
}

void CCryptTwofish::Decrypt( void* pvIn, void* pvOut, int len )
{
  unsigned char* pIn = (unsigned char*)pvIn;
  unsigned char* pOut = (unsigned char*)pvOut;

  if ( m_type == CCryptBase::typeAuto )
  {
    if ( ( *pIn ^ (unsigned char)lcrypt.lkey[0] ) == CRYPT_AUTO_VALUE )
      m_type = CCryptBase::typeLogin;
    else
      m_type = CCryptBase::typeGame;
  }

  if ( m_type == CCryptBase::typeLogin )
  {
    lcrypt.Decrypt( pIn, pOut, len );
  }
  else
  {
    tfish.Decrypt( pIn, pOut, len );
  }
}
}  // namespace Pol::Crypt