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DicelockSecurity (version 9.X)

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arrow DiceLock-x 9.0.0.1 arrow defaultCryptoRandomStream.cpp
defaultCryptoRandomStream.cpp (Default Memory Crypto Random Stream C++ source code file) Print E-mail
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//
// Creator:    http://www.dicelocksecurity.com
// Version:    vers.9.0.0.1
//
// Copyright (C) 2008-2013 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.
// 
// DICELOCK IS PROTECTED BY US PATENT 7508945 AND EUROPEAN PATENT 1182777 WHERE APPLICABLE.
//
// LICENSE INFORMATION CAN BE OBTAINED AT CORPORATE WEB SITE
//
 
#include <stdlib.h>
#include <string.h>
#include "defaultCryptoRandomStream.h"
 
 
using namespace std;
 
 
namespace DiceLockSecurity {
 
  namespace CryptoRandomStream {
 
  // Symmetric cipher type enumerator name
  const CryptoRandomStreams  DefaultCryptoRandomStream::cryptoRandomStreamType = DefaultStream;
 
  // Constructor, default 
  DefaultCryptoRandomStream::DefaultCryptoRandomStream(void) {
 
    this->cryptoStream = NULL;
    this->autoMemory = false;
    this->bitLength = 0;
    this->position = 0;
  }
 
  // Constructor, creates an empty stream with the indicated bit length 
  DefaultCryptoRandomStream::DefaultCryptoRandomStream(unsigned long int bitLength) {
    unsigned long int bytes;
 
    try {
      bytes = bitLength/BYTEBITS;
      if (bitLength % BYTEBITS) {
        bytes++;
      }
      if ( bytes > 0 ) {
        this->cryptoStream = (unsigned char *)calloc(bytes, sizeof(byteBits));
        if (this->cryptoStream == NULL )
          throw "DefaultCryptoRandomStream::DefaultCryptoRandomStream - Memory allocation failure!";
        else {
          memset(this->cryptoStream, 0, bytes);
        }
      }
      else {
        this->cryptoStream = NULL;
      }
      this->bitLength = bitLength;
      this->position = 0;
      this->autoMemory = true;
    }
    catch (char* str) {
      throw str;
    }
  }
 
  // Constructor, sets the pointed stream of the indicated length in bits
  DefaultCryptoRandomStream::DefaultCryptoRandomStream(void* stream, unsigned long int streamBitLength) {
 
    if ( stream != NULL ) {
      this->bitLength = streamBitLength;
      this->cryptoStream = (unsigned char *)stream;
      this->autoMemory = false;
    }
  }
 
  // Destructor
  DefaultCryptoRandomStream::~DefaultCryptoRandomStream() {
 
    if ( this->autoMemory ) {
      free(this->cryptoStream); 
    }
    this->cryptoStream = NULL;
    this->bitLength = 0;
    this->position = 0;
    this->autoMemory = false;
  }
 
  // Make BaseCryptoRandomStream to grow up to unsigned long ints in unsigned chars
  void DefaultCryptoRandomStream::GrowToUCs(unsigned long int numberUCs) {
    unsigned char* tmp;
 
    if ( numberUCs > this->GetUCLength() ) {
      try {
        if ( this->cryptoStream != NULL ) {
          if ( ! this->autoMemory ) {
            throw "DefaultCryptoRandomStream::GrowToUCs - Trying to make grow no automemory stream!";
          }
        }
        tmp = (unsigned char *)calloc(numberUCs, sizeof(unsigned char));
        if ( tmp == NULL ) {
          throw "DefaultCryptoRandomStream::GrowToUCs - Memory allocation failure!";
        }
        else {
          memset(tmp, 0, numberUCs * sizeof(unsigned char));
          if ( this->cryptoStream != NULL ) {
            memcpy(tmp, this->cryptoStream, this->GetUCLength() * sizeof(unsigned char));
            memset(this->cryptoStream, 0, this->GetUCLength() * sizeof(unsigned char));
            free(this->cryptoStream);
          }
          this->bitLength = numberUCs * BYTEBITS;
          this->autoMemory = true;
          this->cryptoStream = tmp;
          tmp = NULL;
        }
      }
      catch (char* str) {
        throw str;
      }
    }
  }
 
  // Make DefaultCryptoRandomStream to adjust just to unsigned long ints in unsigned chars
  void DefaultCryptoRandomStream::AdjustToUCs(unsigned long int numberUCs) {
    unsigned char* tmp;
 
    if ( numberUCs == 0 ) {
      if ( ( ! this->autoMemory ) && ( this->bitLength > 0 ) ) {
        throw "DefaultCryptoRandomStream::AdjustToUCs - Trying to adjust no automemory stream!";
      }
      if ( this->cryptoStream != NULL ) {
        free(this->cryptoStream);
        this->cryptoStream = NULL;
      }
      this->autoMemory = true;
      this->bitLength = 0;
      this->position = 0;
    }
    if ( numberUCs > this->GetUCLength() ) {
      this->GrowToUCs(numberUCs);
    }
    if ( numberUCs < this->GetUCLength() ) {
      try {
        if ( this->cryptoStream != NULL ) {
          if ( ! this->autoMemory ) {
            throw "DefaultCryptoRandomStream::AdjustToUCs - Trying to adjust no automemory stream!";
          }
        }
        tmp = (unsigned char *)calloc(numberUCs, sizeof(unsigned char));
        if ( tmp == NULL ) {
          throw "DefaultCryptoRandomStream::AdjustToUCs - Memory allocation failure!";
        }
        else {
          if ( this->cryptoStream != NULL ) {
            memcpy(tmp, this->cryptoStream, numberUCs * sizeof(unsigned char));
            memset(this->cryptoStream, 0, this->GetUCLength() * sizeof(unsigned char));
            free(this->cryptoStream);
          }
          this->bitLength = numberUCs * BYTEBITS;
          this->autoMemory = true;
          this->cryptoStream = tmp;
          tmp = NULL;
        }
      }
      catch (char* str) {
        throw str;
      }
    }
  }
 
  // Gets the CryptoRandomStream type of the object
  CryptoRandomStreams DefaultCryptoRandomStream::GetCryptoRandomStreamType(void) {
 
    return this->cryptoRandomStreamType;
  }
 
  }
}