Class CyclicRedundancyCheck

Represents the abstract class from which all implementations of the CRC hash algorithm inherit.

Inheritance
System.Object
System.Security.Cryptography.HashAlgorithm
CyclicRedundancyCheck
CyclicRedundancyCheck32
Implements
System.IDisposable
Inherited Members
System.Security.Cryptography.HashAlgorithm.ComputeHash(System.Byte[])
System.Security.Cryptography.HashAlgorithm.ComputeHash(System.Byte[], System.Int32, System.Int32)
System.Security.Cryptography.HashAlgorithm.ComputeHash(System.IO.Stream)
System.Security.Cryptography.HashAlgorithm.Dispose()
System.Security.Cryptography.HashAlgorithm.Dispose(System.Boolean)
System.Security.Cryptography.HashAlgorithm.HashCore(System.Byte[], System.Int32, System.Int32)
System.Security.Cryptography.HashAlgorithm.HashFinal()
System.Security.Cryptography.HashAlgorithm.HashSize
Namespace: Cuemon.Security.Cryptography
Assembly: Cuemon.Security.dll
Syntax
public abstract class CyclicRedundancyCheck : HashAlgorithm, IDisposable

Constructors

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CyclicRedundancyCheck()

Initializes a new instance of the CyclicRedundancyCheck class.

Declaration
protected CyclicRedundancyCheck()
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CyclicRedundancyCheck(PolynomialRepresentation)

Initializes a new instance of the CyclicRedundancyCheck class.

Declaration
protected CyclicRedundancyCheck(PolynomialRepresentation representation)
Parameters
Type Name Description
PolynomialRepresentation representation

The CRC generator polynomial representation.

Properties

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DefaultSeed

Gets the CRC default seed value.

Declaration
public abstract long DefaultSeed { get; }
Property Value
Type Description
System.Int64

The CRC default seed value.
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HashCoreResult

Gets or sets the resolved hash result.

Declaration
protected long HashCoreResult { get; set; }
Property Value
Type Description
System.Int64

The resolved hash result.
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LookupTable

Gets the lookup table for the associated CRC implementation.

Declaration
protected IList<long> LookupTable { get; }
Property Value
Type Description
System.Collections.Generic.IList<System.Int64>

The lookup table for the associated CRC implementation.
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Polynomial

Gets the CRC polynomial hexadecimal value equal to CRC implementation and Representation.

Declaration
public long Polynomial { get; protected set; }
Property Value
Type Description
System.Int64

The CRC polynomial hexadecimal value equal to CRC implementation and Representation.
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Representation

Gets the CRC polynomial generator representation.

Declaration
public PolynomialRepresentation Representation { get; }
Property Value
Type Description
PolynomialRepresentation

The CRC polynomial generator representation.

Methods

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Initialize()

Initializes an implementation of the System.Security.Cryptography.HashAlgorithm class.

Declaration
public override sealed void Initialize()
Overrides
System.Security.Cryptography.HashAlgorithm.Initialize()
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InitializePolynomial()

Initializes the implementation of the polynomial representation details.

Declaration
protected abstract void InitializePolynomial()
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InitializePolynomialLookupTable(Byte, UInt16)

Initializes the implementation details of a CyclicRedundancyCheck related polynomial lookup table.

Declaration
protected abstract void InitializePolynomialLookupTable(byte currentBit, ushort currentTableIndex)
Parameters
Type Name Description
System.Byte currentBit

The current bit ranging from 0 to 7.
System.UInt16 currentTableIndex

The current index of the associated polynomial LookupTable ranging from 0 to 255.
Remarks

This method is - on first run - invoked 8 times per entry in the associated polynomial LookupTable, given a total of 2048 times.

Implements

System.IDisposable

Extension Methods