Sets the EC Diffie-Hellman private key. If encoding
is provided, privateKey
is expected to be a string; otherwise privateKey
is expected to be a Buffer
, TypedArray
, or DataView
.
If privateKey
is not valid for the curve specified when the ECDH
object was created, an error is thrown. Upon setting the private key, the associated public point (key) is also generated and set in the ECDH
object.