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HashAlgorithm::ComputeHash Method (array<Byte>, Int32, Int32)

Computes the hash value for the specified region of the specified byte array.

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

public:
array<unsigned char>^ ComputeHash(
	array<unsigned char>^ buffer, 
	int offset, 
	int count
)

Parameters

buffer
Type: array<System::Byte>
The input to compute the hash code for.
offset
Type: System::Int32
The offset into the byte array from which to begin using data.
count
Type: System::Int32
The number of bytes in the array to use as data.

Return Value

Type: array<System::Byte>
The computed hash code.

ExceptionCondition
ArgumentException

count is an invalid value.

-or-

buffer length is invalid.

ArgumentNullException

buffer is nullptr.

ArgumentOutOfRangeException

offset is out of range. This parameter requires a non-negative number.

ObjectDisposedException

The object has already been disposed.

The size of the hash value depends on the hash algorithm it is computed for. For example, the size of the hash for the HMACSHA384 algorithm is 384 bits, and the size of the hash for the HMACSHA256 algorithm is 256 bits. You can obtain the size of the hash in bits by calling the HashSize property. For more information about hash codes, see Ensuring Data Integrity with Hash Codes.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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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