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HMACSHA512 Constructor (array<Byte>)

Initializes a new instance of the HMACSHA512 class with the specified key data.

Namespace:  System.Security.Cryptography
Assembly:  mscorlib (in mscorlib.dll)

public:
HMACSHA512(
	array<unsigned char>^ key
)

Parameters

key
Type: array<System::Byte>

The secret key for HMACSHA512 encryption. The key can be any length. However, the recommended size is 128 bytes. If the key is more than 128 bytes long, it is hashed (using SHA-512) to derive a 128-byte key. If it is less than 128 bytes long, it is padded to 128 bytes.

ExceptionCondition
ArgumentNullException

The key parameter is nullptr.

For an example of how to use this constructor, see the HMACSHA512 class.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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