ECDiffieHellmanOpenSsl.DeriveKeyFromHmac Method

Definition

Namespace:

System.Security.Cryptography

Assembly:

System.Security.Cryptography.OpenSsl.dll

Performs key derivation using a specified HMAC (Hash-based Message Authentication Code) algorithm with optional prepended or appended data.

public:
 override cli::array <System::Byte> ^ DeriveKeyFromHmac(System::Security::Cryptography::ECDiffieHellmanPublicKey ^ otherPartyPublicKey, System::Security::Cryptography::HashAlgorithmName hashAlgorithm, cli::array <System::Byte> ^ hmacKey, cli::array <System::Byte> ^ secretPrepend, cli::array <System::Byte> ^ secretAppend);

public override byte[] DeriveKeyFromHmac (System.Security.Cryptography.ECDiffieHellmanPublicKey otherPartyPublicKey, System.Security.Cryptography.HashAlgorithmName hashAlgorithm, byte[]? hmacKey, byte[]? secretPrepend, byte[]? secretAppend);

override this.DeriveKeyFromHmac : System.Security.Cryptography.ECDiffieHellmanPublicKey * System.Security.Cryptography.HashAlgorithmName * byte[] * byte[] * byte[] -> byte[]

Public Overrides Function DeriveKeyFromHmac (otherPartyPublicKey As ECDiffieHellmanPublicKey, hashAlgorithm As HashAlgorithmName, hmacKey As Byte(), secretPrepend As Byte(), secretAppend As Byte()) As Byte()

Parameters

otherPartyPublicKey

ECDiffieHellmanPublicKey

The other party's public key.

hashAlgorithm

HashAlgorithmName

The hash algorithm to use to derive the key material.

hmacKey

Byte[]

The key for the HMAC.

secretPrepend

Byte[]

A value to prepend to the derived secret before hashing.

secretAppend

Byte[]

A value to append to the derived secret before hashing.

Returns

Byte[]

The HMAC of the shared secret after prepending or appending data as requested.

Exceptions

ArgumentException

The curve used by otherPartyPublicKey has a different size than the curve from this key.

-or-

The hashAlgorithm parameter does not specify a hash.

ArgumentNullException

otherPartyPublicKey is null.

CryptographicException

The curve used by otherPartyPublicKey is different than the curve from this key.

-or-

This instance represents only a public key.