Blake2b512.HashData Method

Namespace: Rebex.Security.Cryptography

Assembly: Rebex.Security.dll (version 7.0.9147)

HashData(Byte[], Byte[])

Computes a 512-bit (64-byte) hash using the BLAKE2b cryptographic hash and message authentication code (MAC) algorithm.

Declaration

public static byte[] HashData(byte[] key, byte[] source)

Parameters

Type	Name	Description
Byte[]	key	Key to use in HMAC calculation. The key must be a 0 - 64 bytes long array or null. When a null value is provided, the key is treated as an empty array. When the key is null or an empty array, the method will calculate a hash. When the key is 1 - 64 bytes long, the method will calculate a message authentication code (HMAC).
Byte[]	source	An array that contains data to be hashed.

Returns

Type	Description
Byte[]	The hash of the source.

Examples

// prepare data to be hashed
byte[] sourceBytes = GetSourceBytes();
// prepare the key (can be null)
byte[] keyBytes = GetKeyBytes();
// compute the hash;
// the 'hash' variable contains a 64-byte-long hash value
byte[] hash = Blake2b512.HashData(keyBytes, sourceBytes);

HashData(ArraySegment<Byte>, ArraySegment<Byte>)

Computes a 512-bit (64-byte) hash using the BLAKE2b cryptographic hash and message authentication code (MAC) algorithm.

Declaration

public static byte[] HashData(ArraySegment<byte> key, ArraySegment<byte> source)

Parameters

Type	Name	Description
ArraySegment<Byte>	key	Key to use in HMAC calculation. The key must be a 0 - 64 bytes long ArraySegment<T>. When the key is empty, the method will calculate a hash. When the key is 1 - 64 bytes long, the method will calculate a message authentication code (HMAC).
ArraySegment<Byte>	source	An ArraySegment<T> that contains data to be hashed.

Returns

Type	Description
Byte[]	The hash of the source.

Examples

// prepare data to be hashed
ArraySegment<byte> sourceArraySegment = GetSourceData();
// prepare the key (can be an empty ArraySegment)
ArraySegment<byte> keyArraySegment = GetKey();
// compute the hash;
// the 'hash' variable contains a 64-byte-long hash value
byte[] hash = Blake2b512.HashData(keyArraySegment, sourceArraySegment);

HashData(ArraySegment<Byte>, ArraySegment<Byte>, ArraySegment<Byte>)

Computes a 512-bit (64-byte) hash using the BLAKE2b cryptographic hash and message authentication code (MAC) algorithm.

Declaration

public static int HashData(ArraySegment<byte> key, ArraySegment<byte> source, ArraySegment<byte> destination)

Parameters

Type	Name	Description
ArraySegment<Byte>	key	Key to use in HMAC calculation. The key must be a 0 - 64 bytes long ArraySegment<T>. When the key is empty, the method will calculate a hash. When the key is 1 - 64 bytes long, the method will calculate a message authentication code (HMAC).
ArraySegment<Byte>	source	An ArraySegment<T> that contains data to be hashed.
ArraySegment<Byte>	destination	An ArraySegment<T> where the calculated hash will be stored. Must be at least 64 bytes long, otherwise an ArgumentException will be thrown.

Returns

Type	Description
Int32	The number of bytes written to the destination. Always returns the hash size (64 bytes).

Examples

// prepare data to be hashed
ArraySegment<byte> sourceArraySegment = GetSourceData();
// prepare the key (can be an empty ArraySegment)
ArraySegment<byte> keyArraySegment = GetKey();
// prepare an ArraySegment which will receive the 64-byte long hash
ArraySegment<byte> outputHashArraySegment = new ArraySegment<byte>(new byte[64]);
// compute the 64-byte hash and store it into outputHashArraySegment;
// the hashSize variable will contain the value of 64 (hash size in bytes)
int hashSize = Blake2b512.HashData(keyArraySegment, sourceArraySegment, outputHashArraySegment);