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//
// Creator:    http://www.dicelocksecurity.com
// Version:    vers.4.0.0.1
//
// 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.
// 
// DICELOCK IS A REGISTERED TRADEMARK OR TRADEMARK OF THE OWNERS.
// 
 
#include <memory.h>
#include <stdlib.h>
#include "sha384.h"
 
 
namespace DiceLockSecurity {
  
  namespace Hash {
 
  // Hash Algorithms Class enumerator name
  const Hashes Sha384::hashName = SHA_384;
 
  // Number of hash bits
  const unsigned short int Sha384::hashBits = SHA384_DIGESTBITS;
  // Number of hash unsigned chars
  const unsigned short int Sha384::hashUCs = SHA384_DIGESTUCHARS;
  // Number of hash unsigned short ints
  const unsigned short int Sha384::hashUSs = SHA384_DIGESTUSHORTS;
  // Number of hash unsigned long ints
  const unsigned short int Sha384::hashULs = SHA384_DIGESTULONGS;
  // Number of hash unsigned 64 bits
  const unsigned short int Sha384::hash64s = SHA384_DIGESTULG64S;
 
  // Initial hash values of SHA384 
  const unsigned __int64 Sha384::initials[SHA384_DIGESTULONGS] = 
      {0xcbbb9d5dc1059ed8, 
             0x629a292a367cd507, 
             0x9159015a3070dd17, 
             0x152fecd8f70e5939, 
             0x67332667ffc00b31, 
             0x8eb44a8768581511, 
             0xdb0c2e0d64f98fa7, 
       0x47b5481dbefa4fa4};
 
  // Constructor, default 
  Sha384::Sha384() {
 
    this->workingDigest512 = NULL;
    this->autoWorkingDigest = false;
  }
 
  // Destructor
  Sha384::~Sha384() {
 
    if (autoWorkingDigest) {
      delete this->workingDigest512;
      this->workingDigest512 = NULL;
      this->autoWorkingDigest = false;
    }
  }
 
  // Set the Working Digest BaseCryptoRandomStream for underlaying SHA512 algorithm
  void Sha384::SetWorkingDigest(BaseCryptoRandomStream* workDigest) {
 
    this->workingDigest512 = workDigest;
  }
 
  // Set the Working Digest  BaseCryptoRandomStream for underlaying SHA512 algorithm
  unsigned short int Sha384::GetWorkingDigestUCLength(void) {
 
    return this->Sha512::GetUCHashLength();
  }
 
  // Initializes common states of Sha1 algorithm
  void Sha384::Initialize(void) {
 
    if (this->workingDigest512 == NULL) {
      this->workingDigest512 = new DefaultCryptoRandomStream();
      this->workingDigest512->SetCryptoRandomStreamUC(this->GetWorkingDigestUCLength());
      this->autoWorkingDigest = true;
    }
    this->workingDigest512->Set64Position(0, this->initials[0]);
    this->workingDigest512->Set64Position(1, this->initials[1]);
    this->workingDigest512->Set64Position(2, this->initials[2]);
    this->workingDigest512->Set64Position(3, this->initials[3]);
    this->workingDigest512->Set64Position(4, this->initials[4]);
    this->workingDigest512->Set64Position(5, this->initials[5]);
    this->workingDigest512->Set64Position(6, this->initials[6]);
    this->workingDigest512->Set64Position(7, this->initials[7]);
    this->remainingBytesLength = 0;
    this->messageBitLengthHigh = 0;
    this->messageBitLengthLow = 0;
  }
 
  // Adds the BaseCryptoRandomStream to the hash
  void Sha384::Add(BaseCryptoRandomStream* stream) {
    unsigned long int startStreamByte = 0, processBytes = 0;
    long int numBytes = 0;
    unsigned long int i = 0;
 
    // If bytes left from previous added stream, then they will be processed now with added data from new stream
    if (this->remainingBytesLength) {
      if ((this->remainingBytesLength + stream->GetUCLength()) > ((unsigned long int)this->GetDataHashUCs() - 1)) {
        // Setting the point to start the current stream processed
        startStreamByte = this->GetDataHashUCs() - this->remainingBytesLength;
        processBytes = stream->GetUCLength() - (this->GetDataHashUCs() - this->remainingBytesLength);
 
        memcpy(this->remainingBytes + this->remainingBytesLength, stream->GetUCAddressPosition(0), this->GetDataHashUCs() - this->remainingBytesLength);
        // Process remaining bytes of previous streams adn 64 byte padding of current stream
        this->Compress(this->workingDigest512, this->remainingBytes);
        // Updating message byt length processed
        this->AddMessageLength(this->GetDataHashUCs());
        // Remaining bytes of previous strema set to 0
        this->remainingBytesLength = 0;
      }
      else {
        processBytes = stream->GetUCLength();
      }
    }
    else {
      processBytes = stream->GetUCLength();
      startStreamByte = 0;
    }
 
    for (numBytes = 0; processBytes > ((unsigned long int)this->GetDataHashUCs() - 1); numBytes += this->GetDataHashUCs()) {
      // Process the chunk
      this->Compress(this->workingDigest512, stream->GetUCAddressPosition(startStreamByte + numBytes));
      // Updating message byt length processed
      this->AddMessageLength(this->GetDataHashUCs()); 
      processBytes -= this->GetDataHashUCs();
    }
 
    // If remaining bytes left, they will be copied for the next added stream
    if (processBytes > 0) {
      memcpy(this->remainingBytes + this->remainingBytesLength, stream->GetUCAddressPosition(stream->GetUCLength() - processBytes), processBytes);
      this->remainingBytesLength += processBytes;
    }
    i = this->Get64HashLength();
    for (i = 0; i < this->Get64HashLength(); i++) {
      this->messageDigest->Set64Position(i, this->workingDigest512->Get64Position(i));
    }
  }
 
  // Finalize the hash
  void Sha384::Finalize(void) {
    unsigned short int i;
 
    this->remainingBytes[this->remainingBytesLength] = 0x80;
    if ((this->remainingBytesLength * BYTEBITS) % this->dataHashBits >= this->equationModulo) {
      memset(this->remainingBytes + this->remainingBytesLength + 1, 0, this->GetDataHashUCs() - this->remainingBytesLength -1);
      this->Compress(this->workingDigest512, this->remainingBytes);
      this->AddMessageLength(this->remainingBytesLength);
      int i; i=this->GetDataHashUCs();
      memset(this->remainingBytes, 0, this->GetDataHashUCs());
      this->remainingBytesLength = 0;
    }
    else {
      memset(this->remainingBytes + this->remainingBytesLength + 1, 0, this->GetDataHashUCs() - this->remainingBytesLength -1);
    }
    this->AddMessageLength(this->remainingBytesLength); 
    this->remainingBytes[112] = (((unsigned __int64)this->messageBitLengthHigh) >> 56) & 255;
    this->remainingBytes[113] = (((unsigned __int64)this->messageBitLengthHigh) >> 48) & 255;
    this->remainingBytes[114] = (((unsigned __int64)this->messageBitLengthHigh) >> 40) & 255;
    this->remainingBytes[115] = (((unsigned __int64)this->messageBitLengthHigh) >> 32) & 255;
    this->remainingBytes[116] = (((unsigned __int64)this->messageBitLengthHigh) >> 24) & 255;
    this->remainingBytes[117] = (((unsigned __int64)this->messageBitLengthHigh) >> 16) & 255;
    this->remainingBytes[118] = (((unsigned __int64)this->messageBitLengthHigh) >> 8) & 255;
    this->remainingBytes[119] = (((unsigned __int64)this->messageBitLengthHigh)) & 255;
    this->remainingBytes[120] = (((unsigned __int64)this->messageBitLengthLow) >> 56) & 255;
    this->remainingBytes[121] = (((unsigned __int64)this->messageBitLengthLow) >> 48) & 255;
    this->remainingBytes[122] = (((unsigned __int64)this->messageBitLengthLow) >> 40) & 255;
    this->remainingBytes[123] = (((unsigned __int64)this->messageBitLengthLow) >> 32) & 255;
    this->remainingBytes[124] = (((unsigned __int64)this->messageBitLengthLow) >> 24) & 255;
    this->remainingBytes[125] = (((unsigned __int64)this->messageBitLengthLow) >> 16) & 255;
    this->remainingBytes[126] = (((unsigned __int64)this->messageBitLengthLow) >> 8) & 255;
    this->remainingBytes[127] = (((unsigned __int64)this->messageBitLengthLow)) & 255;
    this->Compress(this->workingDigest512, this->remainingBytes);
    for (i = 0; i < this->Get64HashLength(); i++) {
      this->messageDigest->Set64Position(i, this->workingDigest512->Get64Position(i));
    }
  }
 
  // Gets hash length in bits
  unsigned short int Sha384::GetBitHashLength(void) {
 
    return this->hashBits;
  }
 
  // Gets hash length in unsigned chars
  unsigned short int Sha384::GetUCHashLength(void) {
 
    return this->hashUCs;
  }
 
  // Gets hash length in unsigned short ints
  unsigned short int Sha384::GetUSHashLength(void) {
 
    return this->hashUSs;
  }
 
  // Gets hash length in unsigned long ints
  unsigned short int Sha384::GetULHashLength(void) {
 
    return this->hashULs;
  }
 
  // Gets hash length in unsigned 64 bits
  unsigned short int Sha384::Get64HashLength(void) {
 
    return this->hash64s;
  }
 
  // Gets the type of the object
  Hashes Sha384::GetType(void) {
 
    return this->hashName;
  }
  }
}