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//
// Creator:    http://www.dicelocksecurity.com
// Version:    vers.3.0.0.1
//
// Copyright © 2009-2010 DiceLock Security, LLC. All rights reserved.
//
//                               DISCLAIMER
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
#include <memory.h>
#include "ripemd256.h"
 
 
namespace DiceLockSecurity {
  
  namespace Hash {
 
  // Hash Algorithms Class enumerator name
  const Hashes Ripemd256::hashName = RIPEMD_256;
  
  // Number of hash bits
  const unsigned short int Ripemd256::hashBits = 256;
  // Number of hash unsigned chars
  const unsigned short int Ripemd256::hashUCs = 32;
  // Number of hash unsigned short ints
  const unsigned short int Ripemd256::hashUSs = 16;
  // Number of hash unsigned long ints
  const unsigned short int Ripemd256::hashULs = 8;
 
  // Additional initial states of Ripemd 256 algorithm
  const unsigned long int Ripemd256::inistate4 = 0x76543210;
  const unsigned long int Ripemd256::inistate5 = 0xFEDCBA98;
  const unsigned long int Ripemd256::inistate6 = 0x89ABCDEF;
  const unsigned long int Ripemd256::inistate7 = 0x01234567;
 
  // Constructor
  Ripemd256::Ripemd256() {
  }
 
  // Destructor
  Ripemd256::~Ripemd256() {
  }
 
  // Initializes state of Ripmed 256 algorithm
  void Ripemd256::Initialize() {
 
    this->BaseRipemd::Initialize();
    this->messageDigest->SetULPosition(4, inistate4);
    this->messageDigest->SetULPosition(5, inistate5);
    this->messageDigest->SetULPosition(6, inistate6);
    this->messageDigest->SetULPosition(7, inistate7);
  }
 
  // Computes the 64 byte chunk of stream information 
  void Ripemd256::Compress(unsigned long int* stream) {
    unsigned long int a1 = this->messageDigest->GetULPosition(0);
    unsigned long int b1 = this->messageDigest->GetULPosition(1); 
    unsigned long int c1 = this->messageDigest->GetULPosition(2); 
    unsigned long int d1 = this->messageDigest->GetULPosition(3); 
    unsigned long int a2 = this->messageDigest->GetULPosition(4);
    unsigned long int b2 = this->messageDigest->GetULPosition(5);
    unsigned long int c2 = this->messageDigest->GetULPosition(6);
    unsigned long int d2 = this->messageDigest->GetULPosition(7);
    unsigned long int temp;
    Transform_F0(&a1, &b1, &c1, &d1, stream);
    Transform_I5(&a2, &b2, &c2, &d2, stream);
    temp = a1;
    a1 = a2;
    a2 = temp;
    Transform_G1(&a1, &b1, &c1, &d1, stream);
    Transform_H6(&a2, &b2, &c2, &d2, stream);
    temp = b1;
    b1 = b2;
    b2 = temp;
    Transform_H2(&a1, &b1, &c1, &d1, stream);
    Transform_G7(&a2, &b2, &c2, &d2, stream);
    temp = c1;
    c1 = c2;
    c2 = temp;
    Transform_I3(&a1, &b1, &c1, &d1, stream);
    Transform_F9(&a2, &b2, &c2, &d2, stream);
    temp = d1;
    d1 = d2;
    d2 = temp;
    this->messageDigest->SetULPosition(0, this->messageDigest->GetULPosition(0) + a1);
    this->messageDigest->SetULPosition(1, this->messageDigest->GetULPosition(1) + b1);
    this->messageDigest->SetULPosition(2, this->messageDigest->GetULPosition(2) + c1);
    this->messageDigest->SetULPosition(3, this->messageDigest->GetULPosition(3) + d1);
    this->messageDigest->SetULPosition(4, this->messageDigest->GetULPosition(4) + a2);
    this->messageDigest->SetULPosition(5, this->messageDigest->GetULPosition(5) + b2);
    this->messageDigest->SetULPosition(6, this->messageDigest->GetULPosition(6) + c2);
    this->messageDigest->SetULPosition(7, this->messageDigest->GetULPosition(7) + d2);
  }
 
  // Gets hash length in bits
  unsigned short int Ripemd256::GetBitHashLength(void) {
 
    return this->hashBits;
  }
 
  // Gets hash length in unsigned chars
  unsigned short int Ripemd256::GetUCHashLength(void) {
 
    return this->hashUCs;
  }
 
  // Gets hash length in unsigned short ints
  unsigned short int Ripemd256::GetUSHashLength(void) {
 
    return this->hashUSs;
  }
 
  // Gets hash length in unsigned long ints
  unsigned short int Ripemd256::GetULHashLength(void) {
 
    return this->hashULs;
  }
 
  // Gets the type of the object
  Hashes Ripemd256::GetType(void) {
 
    return this->hashName;
  }
  }
}