innovaphone.crypto.ecdh

Example: Alice and Bob want to agree on a shared secret over an insecure channel. For that they use an ECDH key agreement.

• Alice and Bob create their private key.
• Then both create a public key share that they can send to each other over an insecure channel.
• Finally both use it to calculate the same shared secret.

innovaphone.crypto.ecdh

A class for ECDH key agreement.

innovaphone.crypto.ecdh(curve, includePointFormat)

A constructor for the object encapsulating a single ECDH handshake.

curve

Optional, defaulting to "secp256r1". The elliptic curve that shall be used. Allowed values are "secp256r1", "secp224r1", "secp192r1", "secp192k1", "secp160r1", "secp160k1" and "secp128r1".

includePointFormat

Optional, defaulting to false. If set to true the key shares include a prefix specifying the point format "04".

getLocalKeyShare()

Returns a hexstring representing the local key share.

getSharedSecret(remoteKeyShare)

Takes the remote key share and returns the shared secret as a hexstring.

remoteKeyShare

A hexstring representing the remote key share.