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ECDiffieHellmanCng.DeriveSecretAgreementHandle Method (CngKey)

Gets a handle to the secret agreement generated between two parties, given a CngKey object that contains the second party's public key.

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

[SecurityPermissionAttribute(SecurityAction.Demand, UnmanagedCode = true)]
public SafeNCryptSecretHandle DeriveSecretAgreementHandle(
	CngKey otherPartyPublicKey
)

Parameters

otherPartyPublicKey
Type: System.Security.Cryptography.CngKey

An object that contains the public part of the Elliptic Curve Diffie-Hellman (ECDH) key from the other party in the key exchange.

Return Value

Type: Microsoft.Win32.SafeHandles.SafeNCryptSecretHandle
A handle to the secret agreement. This information is calculated from the current object's private key and the specified public key.

ExceptionCondition
ArgumentNullException

otherPartyPublicKey is null.

ArgumentException

otherPartyPublicKey is not an ECDH key, or it is not the correct size.

CryptographicException

All other errors.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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