HKDF.Extract Method

Definition

Namespace:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.dll

Overloads

Extract(HashAlgorithmName, Byte[], Byte[])	Performs the HKDF-Extract function. See section 2.2 of RFC5869.
Extract(HashAlgorithmName, ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>)	Performs the HKDF-Extract function. See section 2.2 of RFC5869.

Extract(HashAlgorithmName, Byte[], Byte[])

Source:

HKDF.cs

Performs the HKDF-Extract function. See section 2.2 of RFC5869.

public static byte[] Extract (System.Security.Cryptography.HashAlgorithmName hashAlgorithmName, byte[] ikm, byte[]? salt = default);

static member Extract : System.Security.Cryptography.HashAlgorithmName * byte[] * byte[] -> byte[]

Public Shared Function Extract (hashAlgorithmName As HashAlgorithmName, ikm As Byte(), Optional salt As Byte() = Nothing) As Byte()

Parameters

hashAlgorithmName

HashAlgorithmName

The hash algorithm used for HMAC operations.

ikm

Byte[]

The input keying material.

salt

Byte[]

The optional salt value (a non-secret random value). If not provided it defaults to a byte array of the same length as the output of the specified hash algorithm.

Returns

Byte[]

The pseudorandom key (prk).

Extract(HashAlgorithmName, ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>)

Source:

HKDF.cs

Performs the HKDF-Extract function. See section 2.2 of RFC5869.

public:
 static int Extract(System::Security::Cryptography::HashAlgorithmName hashAlgorithmName, ReadOnlySpan<System::Byte> ikm, ReadOnlySpan<System::Byte> salt, Span<System::Byte> prk);

public static int Extract (System.Security.Cryptography.HashAlgorithmName hashAlgorithmName, ReadOnlySpan<byte> ikm, ReadOnlySpan<byte> salt, Span<byte> prk);

static member Extract : System.Security.Cryptography.HashAlgorithmName * ReadOnlySpan<byte> * ReadOnlySpan<byte> * Span<byte> -> int

Public Shared Function Extract (hashAlgorithmName As HashAlgorithmName, ikm As ReadOnlySpan(Of Byte), salt As ReadOnlySpan(Of Byte), prk As Span(Of Byte)) As Integer

Parameters

hashAlgorithmName

HashAlgorithmName

The hash algorithm used for HMAC operations.

ikm

ReadOnlySpan<Byte>

The input keying material.

salt

ReadOnlySpan<Byte>

The salt value (a non-secret random value).

prk

Span<Byte>

The destination buffer to receive the pseudorandom key (prk).

Returns

Int32

The number of bytes written to the prk buffer.