SP800108HmacCounterKdf.DeriveBytes Method

Reference

Definition

Namespace:: System.Security.Cryptography

Assembly:: System.Security.Cryptography.dll

Assembly:: Microsoft.Bcl.Cryptography.dll

Package:: Microsoft.Bcl.Cryptography v9.0.0-rc.2.24473.5

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Overloads

DeriveBytes(Byte[], HashAlgorithmName, Byte[], Byte[], Int32)	Derives a key of a specified length.
DeriveBytes(Byte[], HashAlgorithmName, String, String, Int32)	Derives a key of a specified length.
DeriveBytes(ReadOnlySpan<Byte>, HashAlgorithmName, ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Int32)	Derives a key of a specified length.
DeriveBytes(ReadOnlySpan<Byte>, HashAlgorithmName, ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>)	Fills a buffer with a derived key.
DeriveBytes(ReadOnlySpan<Byte>, HashAlgorithmName, ReadOnlySpan<Char>, ReadOnlySpan<Char>, Int32)	Derives a key of a specified length.
DeriveBytes(ReadOnlySpan<Byte>, HashAlgorithmName, ReadOnlySpan<Char>, ReadOnlySpan<Char>, Span<Byte>)	Fills a buffer with a derived key.

DeriveBytes(Byte[], HashAlgorithmName, Byte[], Byte[], Int32)

Source:: SP800108HmacCounterKdf.cs

Source:: SP800108HmacCounterKdf.cs

Derives a key of a specified length.

public:
 static cli::array <System::Byte> ^ DeriveBytes(cli::array <System::Byte> ^ key, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, cli::array <System::Byte> ^ label, cli::array <System::Byte> ^ context, int derivedKeyLengthInBytes);

public static byte[] DeriveBytes (byte[] key, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, byte[] label, byte[] context, int derivedKeyLengthInBytes);

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

Public Shared Function DeriveBytes (key As Byte(), hashAlgorithm As HashAlgorithmName, label As Byte(), context As Byte(), derivedKeyLengthInBytes As Integer) As Byte()

Parameters

key: Byte[]

The key-derivation key.

hashAlgorithm: HashAlgorithmName

The HMAC algorithm.

label: Byte[]

The label that identifies the purpose for the derived key.

context: Byte[]

The context containing information related to the derived key.

derivedKeyLengthInBytes: Int32

The length of the derived key, in bytes.

Returns

Byte[]

An array containing the derived key.

Exceptions

ArgumentNullException

key is null.

-or-

label is null.

-or-

context is null.

-or-

hashAlgorithm has a Name which is null.

ArgumentException

hashAlgorithm has a Name which is empty.

ArgumentOutOfRangeException

derivedKeyLengthInBytes is negative or larger than the maximum number of bytes that can be derived.

CryptographicException

hashAlgorithm is not a known or supported hash algorithm.

PlatformNotSupportedException

The current platform does not have a supported implementation of HMAC.

Applies to

DeriveBytes(Byte[], HashAlgorithmName, String, String, Int32)

Source:: SP800108HmacCounterKdf.cs

Source:: SP800108HmacCounterKdf.cs

Derives a key of a specified length.

public:
 static cli::array <System::Byte> ^ DeriveBytes(cli::array <System::Byte> ^ key, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, System::String ^ label, System::String ^ context, int derivedKeyLengthInBytes);

public static byte[] DeriveBytes (byte[] key, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, string label, string context, int derivedKeyLengthInBytes);

static member DeriveBytes : byte[] * System.Security.Cryptography.HashAlgorithmName * string * string * int -> byte[]

Public Shared Function DeriveBytes (key As Byte(), hashAlgorithm As HashAlgorithmName, label As String, context As String, derivedKeyLengthInBytes As Integer) As Byte()

Parameters

key: Byte[]

The key-derivation key.

hashAlgorithm: HashAlgorithmName

The HMAC algorithm.

label: String

The label that identifies the purpose for the derived key.

context: String

The context containing information related to the derived key.

derivedKeyLengthInBytes: Int32

The length of the derived key, in bytes.

Returns

Byte[]

An array containing the derived key.

Exceptions

ArgumentNullException

key is null.

-or-

label is null.

-or-

context is null.

-or-

hashAlgorithm has a Name which is null.

ArgumentException

hashAlgorithm has a Name which is empty.

ArgumentOutOfRangeException

derivedKeyLengthInBytes is negative or larger than the maximum number of bytes that can be derived.

CryptographicException

hashAlgorithm is not a known or supported hash algorithm.

EncoderFallbackException

label or context contains text that cannot be converted to UTF-8.

PlatformNotSupportedException

The current platform does not have a supported implementation of HMAC.

Remarks

label and context will be converted to bytes using the UTF-8 encoding. for other encodings, perform the conversion using the desired encoding and use an overload which accepts the label and context as a sequence of bytes.

Applies to

DeriveBytes(ReadOnlySpan<Byte>, HashAlgorithmName, ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Int32)

Source:: SP800108HmacCounterKdf.cs

Source:: SP800108HmacCounterKdf.cs

Derives a key of a specified length.

public:
 static cli::array <System::Byte> ^ DeriveBytes(ReadOnlySpan<System::Byte> key, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, ReadOnlySpan<System::Byte> label, ReadOnlySpan<System::Byte> context, int derivedKeyLengthInBytes);

public static byte[] DeriveBytes (ReadOnlySpan<byte> key, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, ReadOnlySpan<byte> label, ReadOnlySpan<byte> context, int derivedKeyLengthInBytes);

static member DeriveBytes : ReadOnlySpan<byte> * System.Security.Cryptography.HashAlgorithmName * ReadOnlySpan<byte> * ReadOnlySpan<byte> * int -> byte[]

Public Shared Function DeriveBytes (key As ReadOnlySpan(Of Byte), hashAlgorithm As HashAlgorithmName, label As ReadOnlySpan(Of Byte), context As ReadOnlySpan(Of Byte), derivedKeyLengthInBytes As Integer) As Byte()

Parameters

key: ReadOnlySpan<Byte>

The key-derivation key.

hashAlgorithm: HashAlgorithmName

The HMAC algorithm.

label: ReadOnlySpan<Byte>

The label that identifies the purpose for the derived key.

context: ReadOnlySpan<Byte>

The context containing information related to the derived key.

derivedKeyLengthInBytes: Int32

The length of the derived key, in bytes.

Returns

Byte[]

An array containing the derived key.

Exceptions

ArgumentNullException

hashAlgorithm has a Name which is null.

ArgumentException

hashAlgorithm has a Name which is empty.

ArgumentOutOfRangeException

derivedKeyLengthInBytes is negative or larger than the maximum number of bytes that can be derived.

CryptographicException

hashAlgorithm is not a known or supported hash algorithm.

PlatformNotSupportedException

The current platform does not have a supported implementation of HMAC.

Applies to

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

Source:: SP800108HmacCounterKdf.cs

Source:: SP800108HmacCounterKdf.cs

Fills a buffer with a derived key.

public:
 static void DeriveBytes(ReadOnlySpan<System::Byte> key, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, ReadOnlySpan<System::Byte> label, ReadOnlySpan<System::Byte> context, Span<System::Byte> destination);

public static void DeriveBytes (ReadOnlySpan<byte> key, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, ReadOnlySpan<byte> label, ReadOnlySpan<byte> context, Span<byte> destination);

static member DeriveBytes : ReadOnlySpan<byte> * System.Security.Cryptography.HashAlgorithmName * ReadOnlySpan<byte> * ReadOnlySpan<byte> * Span<byte> -> unit

Public Shared Sub DeriveBytes (key As ReadOnlySpan(Of Byte), hashAlgorithm As HashAlgorithmName, label As ReadOnlySpan(Of Byte), context As ReadOnlySpan(Of Byte), destination As Span(Of Byte))

Parameters

key: ReadOnlySpan<Byte>

The key-derivation key.

hashAlgorithm: HashAlgorithmName

The HMAC algorithm.

label: ReadOnlySpan<Byte>

The label that identifies the purpose for the derived key.

context: ReadOnlySpan<Byte>

The context containing information related to the derived key.

destination: Span<Byte>

The buffer which will receive the derived key.

Exceptions

ArgumentNullException

hashAlgorithm has a Name which is null.

ArgumentException

hashAlgorithm has a Name which is empty.

ArgumentOutOfRangeException

destination is larger than the maximum number of bytes that can be derived.

CryptographicException

hashAlgorithm is not a known or supported hash algorithm.

PlatformNotSupportedException

The current platform does not have a supported implementation of HMAC.

Applies to

DeriveBytes(ReadOnlySpan<Byte>, HashAlgorithmName, ReadOnlySpan<Char>, ReadOnlySpan<Char>, Int32)

Source:: SP800108HmacCounterKdf.cs

Source:: SP800108HmacCounterKdf.cs

Derives a key of a specified length.

public:
 static cli::array <System::Byte> ^ DeriveBytes(ReadOnlySpan<System::Byte> key, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, ReadOnlySpan<char> label, ReadOnlySpan<char> context, int derivedKeyLengthInBytes);

public static byte[] DeriveBytes (ReadOnlySpan<byte> key, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, ReadOnlySpan<char> label, ReadOnlySpan<char> context, int derivedKeyLengthInBytes);

static member DeriveBytes : ReadOnlySpan<byte> * System.Security.Cryptography.HashAlgorithmName * ReadOnlySpan<char> * ReadOnlySpan<char> * int -> byte[]

Public Shared Function DeriveBytes (key As ReadOnlySpan(Of Byte), hashAlgorithm As HashAlgorithmName, label As ReadOnlySpan(Of Char), context As ReadOnlySpan(Of Char), derivedKeyLengthInBytes As Integer) As Byte()

Parameters

key: ReadOnlySpan<Byte>

The key-derivation key.

hashAlgorithm: HashAlgorithmName

The HMAC algorithm.

label: ReadOnlySpan<Char>

The label that identifies the purpose for the derived key.

context: ReadOnlySpan<Char>

The context containing information related to the derived key.

derivedKeyLengthInBytes: Int32

The length of the derived key, in bytes.

Returns

Byte[]

An array containing the derived key.

Exceptions

ArgumentNullException

hashAlgorithm has a Name which is null.

ArgumentException

hashAlgorithm has a Name which is empty.

ArgumentOutOfRangeException

derivedKeyLengthInBytes is negative or larger than the maximum number of bytes that can be derived.

CryptographicException

hashAlgorithm is not a known or supported hash algorithm.

EncoderFallbackException

label or context contains text that cannot be converted to UTF-8.

PlatformNotSupportedException

The current platform does not have a supported implementation of HMAC.

Remarks

Applies to

DeriveBytes(ReadOnlySpan<Byte>, HashAlgorithmName, ReadOnlySpan<Char>, ReadOnlySpan<Char>, Span<Byte>)

Source:: SP800108HmacCounterKdf.cs

Source:: SP800108HmacCounterKdf.cs

Fills a buffer with a derived key.

public:
 static void DeriveBytes(ReadOnlySpan<System::Byte> key, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, ReadOnlySpan<char> label, ReadOnlySpan<char> context, Span<System::Byte> destination);

public static void DeriveBytes (ReadOnlySpan<byte> key, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, ReadOnlySpan<char> label, ReadOnlySpan<char> context, Span<byte> destination);

static member DeriveBytes : ReadOnlySpan<byte> * System.Security.Cryptography.HashAlgorithmName * ReadOnlySpan<char> * ReadOnlySpan<char> * Span<byte> -> unit

Public Shared Sub DeriveBytes (key As ReadOnlySpan(Of Byte), hashAlgorithm As HashAlgorithmName, label As ReadOnlySpan(Of Char), context As ReadOnlySpan(Of Char), destination As Span(Of Byte))