twisted.internet._sslverify._ChooseDiffieHellmanEllipticCurve

Chooses the best elliptic curve for Elliptic Curve Diffie-Hellman key exchange, and provides a configureECDHCurve method to set the curve, when appropriate, on a new OpenSSL.SSL.Context.

The configureECDHCurve method will be set to one of the following based on the provided OpenSSL version and configuration:

Parameters	openSSLVersion	The OpenSSL version number. (type: `int`)
	openSSLlib	The OpenSSL `cffi` library module.
	openSSLlib	The OpenSSL `crypto` module.
See Also	`OpenSSL.SSL.OPENSSL_VERSION_NUMBER`
	`crypto`

Method	__init__	Undocumented
Method	_configureOpenSSL110	OpenSSL 1.1.0 Contexts are preconfigured with an optimal set of ECDH curves. This method does nothing.
Method	_configureOpenSSL102	Have the context automatically choose elliptic curves for ECDH. Run on OpenSSL 1.0.2 and OpenSSL 1.1.0+, but only has an effect on OpenSSL 1.0.2.
Method	_configureOpenSSL101	Set the default elliptic curve for ECDH on the context. Only run on OpenSSL 1.0.1.
Method	_configureOpenSSL101NoCurves	No elliptic curves are available on OpenSSL 1.0.1. We can't set anything, so do nothing.

def __init__(self, openSSLVersion, openSSLlib, openSSLcrypto):

Undocumented

def _configureOpenSSL110(self, ctx):

OpenSSL 1.1.0 Contexts are preconfigured with an optimal set of ECDH curves. This method does nothing.

Parameters ctx OpenSSL.SSL.Context

def _configureOpenSSL102(self, ctx):

Have the context automatically choose elliptic curves for ECDH. Run on OpenSSL 1.0.2 and OpenSSL 1.1.0+, but only has an effect on OpenSSL 1.0.2.

Parameters ctx The context which . (type: OpenSSL.SSL.Context)

def _configureOpenSSL101(self, ctx):

Set the default elliptic curve for ECDH on the context. Only run on OpenSSL 1.0.1.

Parameters ctx The context on which to set the ECDH curve. (type: OpenSSL.SSL.Context)

def _configureOpenSSL101NoCurves(self, ctx):

No elliptic curves are available on OpenSSL 1.0.1. We can't set anything, so do nothing.

Parameters ctx The context on which to set the ECDH curve. (type: OpenSSL.SSL.Context)

twisted.internet._sslverify._ChooseDiffieHellmanEllipticCurve(object) class documentation

`twisted.internet._sslverify._ChooseDiffieHellmanEllipticCurve(object)` class documentation