Friday, 24 November 2017
arrow DiceChecker 6.0.0.1 arrow baseCryptoRandomStream.cpp (2)
baseCryptoRandomStream.cpp (2) (Crypto Random Stream base class C++ source code second part file) Print E-mail
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  // Gets the unsigned char at specified position, position based in array of unsigned char
  unsigned char* BaseCryptoRandomStream::GetUCAddressPosition(unsigned long int pos) {
 
    if ( pos >= this->GetUCLength() )
      return NULL;
    else
      return (unsigned char *)(&(this->cryptoStream[pos * sizeof(unsigned char)]));
  }
 
  // Gets the unsigned short at specified position, position based in array of unsigned short
  unsigned short int* BaseCryptoRandomStream::GetUSAddressPosition(unsigned long int pos) {
 
    if ( pos >= this->GetUSLength() )
      return NULL;
    else
      return (unsigned short int *)(&(this->cryptoStream[pos * sizeof(unsigned short int)]));
  }
      
  // Gets the unsigned long at specified position, position based in array of unsigned long
  unsigned long int* BaseCryptoRandomStream::GetULAddressPosition(unsigned long int pos) {
 
    if ( pos >= this->GetULLength() )
      return NULL;
    else
      return (unsigned long int *)(&(this->cryptoStream[pos * sizeof(unsigned long int)]));
  }
      
  // Gets the unsigned 64 bit at specified position, position based in array of unsigned 64 bit
  unsigned __int64* BaseCryptoRandomStream::Get64AddressPosition(unsigned __int64 pos) {
 
    if ( pos >= this->Get64Length() )
      return NULL;
    else
      return (unsigned __int64 *)(&(this->cryptoStream[pos * sizeof(unsigned __int64)]));
  }
 
  // Gets the baseCryptoRandomStream portion at specified position with 
  // from baseCryptoRandomStream object, position and length based in array of unsigned char
  void BaseCryptoRandomStream::GetUCSubRandomStream(BaseCryptoRandomStream* subStream, unsigned long int pos) {
 
    try {
      if ( pos >= this->GetUCLength() ) {
        throw "Positions exceeded stream length !";
      }
      else {
        subStream->bitLength = this->GetBitLength() - (pos * BYTEBITS);
        subStream->cryptoStream = (unsigned char *)(&(this->cryptoStream[pos * sizeof(unsigned char)]));
      }
    }
    catch (char* str) {
      throw str;
    }
  }
 
  // Gets the baseCryptoRandomStream portion at specified position
  // from baseCryptoRandomStream object, position and length based in array of unsigned short int
  void BaseCryptoRandomStream::GetUSSubRandomStream(BaseCryptoRandomStream* subStream, unsigned long int pos) {
 
    try {
      if ( pos >= this->GetUSLength() ) {
        throw "Positions exceeded stream length !";
      }
      else {
        subStream->bitLength = this->GetBitLength() - (pos * BYTEBITS * sizeof(unsigned short int));
        subStream->cryptoStream = (unsigned char *)(&(this->cryptoStream[pos * sizeof(unsigned short int)]));
      }
    }
    catch (char* str) {
      throw str;
    }
  }
 
  // Gets the baseCryptoRandomStream portion at specified position
  // from baseCryptoRandomStream object, position and length based in array of unsigned long int
  void BaseCryptoRandomStream::GetULSubRandomStream(BaseCryptoRandomStream* subStream, unsigned long int pos) {
 
    try {
      if ( pos >= this->GetULLength() ) {
        throw "Positions exceeded stream length !";
      }
      else {
        subStream->bitLength = this->GetBitLength() - (pos * BYTEBITS * sizeof(unsigned long int));
        subStream->cryptoStream = (unsigned char *)(&(this->cryptoStream[pos * sizeof(unsigned long int)]));
      }
    }
    catch (char* str) {
      throw str;
    }
  }
 
 
  // Gets the baseCryptoRandomStream portion at specified position with a specified length 
  // from baseCryptoRandomStream object, position and length based in array of unsigned char
  void BaseCryptoRandomStream::GetUCSubRandomStream(BaseCryptoRandomStream* subStream, unsigned long int pos, unsigned long int length) {
 
    try {
      if ( pos >= this->GetUCLength() ) {
        throw "Positions exceeded stream length !";
      }
      else {
        if ( (pos + length) > (this->GetBitLength() / (BYTEBITS * sizeof(unsigned char))) ) {
          throw "Positions plus length exceeded stream length !";
        }
        else {
          subStream->bitLength = length * BYTEBITS;
          subStream->cryptoStream = (unsigned char *)(&(this->cryptoStream[pos * sizeof(unsigned char)]));
        }
      }
    }
    catch (char* str) {
      throw str;
    }
  }
 
  // Gets the baseCryptoRandomStream portion at specified position with a specified length 
  // from baseCryptoRandomStream object, position and length based in array of unsigned short int
  void BaseCryptoRandomStream::GetUSSubRandomStream(BaseCryptoRandomStream* subStream, unsigned long int pos, unsigned long int length) {
 
    try {
      if ( pos >= this->GetUSLength() ) {
        throw "Positions exceeded stream length !";
      }
      else {
        if ( (pos + length) > (this->GetBitLength() / (BYTEBITS * sizeof(unsigned short int))) ) {
          throw "Positions plus length exceeded stream length !";
        }
        else {
          subStream->bitLength = length * BYTEBITS * sizeof(unsigned short int);
          subStream->cryptoStream = (unsigned char *)(&(this->cryptoStream[pos * sizeof(unsigned short int)]));
        }
      }
    }
    catch (char* str) {
      throw str;
    }
  }
 
  // Gets the baseCryptoRandomStream portion at specified position with a specified length 
  // from baseCryptoRandomStream object, position and length based in array of unsigned long int
  void BaseCryptoRandomStream::GetULSubRandomStream(BaseCryptoRandomStream* subStream, unsigned long int pos, unsigned long int length) {
 
    try {
      if ( pos >= this->GetULLength() ) {
        throw "Positions exceeded stream length !";
      }
      else {
        if ( (pos + length) > (this->GetBitLength() / (BYTEBITS * sizeof(unsigned long int))) ) {
          throw "Positions plus length exceeded stream length !";
        }
        else {
          subStream->bitLength = length * BYTEBITS * sizeof(unsigned long int);
          subStream->cryptoStream = (unsigned char *)(&(this->cryptoStream[pos * sizeof(unsigned long int)]));
        }
      }
    }
    catch (char* str) {
      throw str;
    }
  }
 
  // Reduces considered length of BaseCryptoRandomStream, real length is mantained, 
  // but any access to BaseCryptoRandomStream through the interface will be limited to 
  // the new considered length. BaseCryptoRandomStream will remain with its original 
  // length and using the specified memory.
  // Reduces length in bits.
  void BaseCryptoRandomStream::ReduceBitLength(unsigned long int value) {
 
    if ( this->reducedBitLength ) {
      this->reducedBitLength -= value; 
    }
    else {
      this->reducedBitLength = this->bitLength - value;
    }
  }
 
  // Reduces considered length of BaseCryptoRandomStream, real length is mantained, 
  // but any access to BaseCryptoRandomStream through the interface will be limited to 
  // the new considered length. BaseCryptoRandomStream will remain with its original 
  // length and using the specified memory.
  // Reduces length in unsigned chars.
  void BaseCryptoRandomStream::ReduceUCLength(unsigned long int value) {
 
    if ( this->reducedBitLength ) {
      this->reducedBitLength -= (value * BYTEBITS); 
    }
    else {
      this->reducedBitLength = this->bitLength - (value * BYTEBITS);
    }
  }
 
  // Reduces considered length of BaseCryptoRandomStream, real length is mantained, 
  // but any access to BaseCryptoRandomStream through the interface will be limited to 
  // the new considered length. BaseCryptoRandomStream will remain with its original 
  // length and using the specified memory.
  // Reduces length in unsigned short ints.
  void BaseCryptoRandomStream::ReduceUSLength(unsigned long int value) {
 
    if ( this->reducedBitLength ) {
      this->reducedBitLength -= (value * BYTEBITS * sizeof(unsigned short int)); 
    }
    else {
      this->reducedBitLength = this->bitLength - (value * BYTEBITS * sizeof(unsigned short int));
    }
  }
 
  // Reduces considered length of BaseCryptoRandomStream, real length is mantained, 
  // but any access to BaseCryptoRandomStream through the interface will be limited to 
  // the new considered length. BaseCryptoRandomStream will remain with its original 
  // length and using the specified memory.
  // Reduces length in unsigned long ints.
  void BaseCryptoRandomStream::ReduceULLength(unsigned long int value) {
 
    if ( this->reducedBitLength ) {
      this->reducedBitLength -= (value * BYTEBITS * sizeof(unsigned long int)); 
    }
    else {
      this->reducedBitLength = this->bitLength - (value * BYTEBITS * sizeof(unsigned long int));
    }
  }
 
  // Indicates if BaseCryptoRandomStream's length has been reduced in a 
  // fictitious way
  bool BaseCryptoRandomStream::ReducedLength(void) {
    return (this->reducedBitLength != 0);
  }
 
 
  // Restores original length of BaseCryptoRandomStream and removes any 
  // fictitious reduced length 
  void BaseCryptoRandomStream::RestoreLength(void) {
 
    this->reducedBitLength = 0;
  }
 
  // Operator equal, compares the BaseCryptoRandomStream object with the 
  // BaseCryptoRandomStream parameter
  bool BaseCryptoRandomStream::Equals(BaseCryptoRandomStream* otherStream) {
 
    if (otherStream == NULL) {
      return false;
    }
    else {
      if (this->GetBitLength() != otherStream->GetBitLength()) {
        return false;
      }
      else {
        return (! memcmp(this->cryptoStream, otherStream->cryptoStream, this->GetUCLength()));
      }
    }
  }
 
  // Operator copy, copies the content of BaseCryptoRandomStream object
  // to the BaseCryptoRandomStream object passed as parameter
  void BaseCryptoRandomStream::Copy(BaseCryptoRandomStream* target) {
    try {
      if ( this->GetUCLength() != target->GetUCLength() )
        throw "Streams have different lengths !";
      else {
        memcpy(target->cryptoStream, this->cryptoStream, this->GetUCLength());
      }
    }
    catch (char* str) {
      throw str;
    }
  }
  }
}