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HMACSHA1 Constructor (array<Byte>, Boolean)

Initializes a new instance of the HMACSHA1 class with the specified key data and a value that specifies whether to use the managed version of the SHA1 algorithm.

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

public:
HMACSHA1(
	array<unsigned char>^ key, 
	bool useManagedSha1
)

Parameters

key
Type: array<System::Byte>

The secret key for HMACSHA1 encryption. The key can be any length, but if it is more than 64 bytes long, it is hashed (using SHA-1) to derive a 64-byte key. Therefore, the recommended size of the secret key is 64 bytes.

useManagedSha1
Type: System::Boolean

true to use the managed implementation of the SHA1 algorithm (the SHA1Managed class); false to use the unmanaged implementation (the SHA1CryptoServiceProvider 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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