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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 nullptr.

ArgumentException

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

CryptographicException

All other errors.

.NET Framework

Supported in: 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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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