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HMACSHA1 Constructor (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(
	byte[] key,
	bool useManagedSha1
)

Parameters

key
Type: System.Byte[]
The secret key for HMACSHA1 encryption. The key can be any length but if it is more than 64 bytes long, it will be 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, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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