Secp256k1.ECDH (secp256k1 v0.7.2)

Module implementing libsecp256k1 ECDH shared secret computation.

This returns libsecp256k1's default hashed ECDH output, currently SHA256 over the compressed shared point. For generic raw ECDH, use :crypto.compute_key/4.

Examples

iex> seckey = <<1::256>>
iex> pubkey = Secp256k1.pubkey(<<2::256>>, :compressed)
iex> shared_secret = Secp256k1.ECDH.ecdh(seckey, pubkey)
iex> byte_size(shared_secret)
32

Summary

Functions

ecdh(seckey, pubkey)

Compute libsecp256k1's default hashed ECDH shared secret.

Functions

ecdh(seckey, pubkey)

@spec ecdh(
  seckey :: Secp256k1.seckey(),
  pubkey :: Secp256k1.compressed_pubkey() | Secp256k1.uncompressed_pubkey()
) :: Secp256k1.shared_secret()

Compute libsecp256k1's default hashed ECDH shared secret.