package rfc7748

A private key for this curve. Private keys are, generally speaking, natural numbers for scalar multiplication of curve points.

A public key for this curve. Public keys form a curve in 2D space and are uniquely identified by their x-coordinate (up to symmetry).

The size of a valid private or public key, in bytes.

The base point of the curve.

Create a public key from a given string. The key is assumed to be encoded in hexadecimal and must have a length of 2*key_size. The string is silently truncated (if too long) or padded (if too short). An exception is raised if the string contains characters that are not valid hexadecimal digits. The curves in RFC 7748 are specially crafted such that public keys received from untrusted sources can be used safely without validation.

Note that the creation includes a canonicalization step and thus, in general, string_of_public_key (public_key_of_string s) <> s.

Create a private key from a given string. The key is assumed to be encoded in hexadecimal and must have a length of 2*key_size. The string is silently truncated (if too long) or padded (if too short). An exception is raised if the string contains characters that are not valid hexadecimal digits. The curves in RFC 7748 are specially crafted such that any random sequence of bytes of the correct length can be used to create a private key.

Note that the creation includes a canonicalization step and thus, in general, string_of_private_key (private_key_of_string s) <> s.

Convert the public key to its hex-encoded string representation.

Convert the private key to its hex-encoded string representation.

scale priv pub is the scalar multiplication of pub by priv.

public_key_of_private_key priv is equal to scale priv base