crypto/ec_encryption library

Properties

G → ECPoint

Group order 'n'

final

n → BigInt

Extract the elliptic curve's group order 'n' and generator point 'G'.

final

secp256k1 → ECCurve_secp256k1

Create an instance of the secp256k1 elliptic curve.

final

Functions

generateTweek(Uint8List point, Uint8List tweak) → Uint8List?

This function generates a tweaked private key from a private key and a tweak. It performs validation checks and returns the tweaked private key as a Uint8List. If the inputs are invalid or the resulting tweaked private key is invalid, it returns null.

isOrderScalar(dynamic x) → bool

This function checks if a value 'x' is a valid scalar less than the elliptic curve group order. It first ensures that 'x' is a scalar and then compares it to the group order. It returns true if 'x' is a valid scalar less than the group order; otherwise, it returns false.

isPoint(Uint8List p) → bool

This function checks if a Uint8List 'p' represents a valid elliptic curve point. It performs several checks on the structure and values within 'p' to determine validity. It returns true if 'p' is a valid point; otherwise, it returns false.

isPrivate(Uint8List x) → bool

Generator point 'G' This function checks if a Uint8List 'x' represents a valid private key. It performs multiple checks to ensure 'x' is a valid scalar within a specified range. It returns true if 'x' is a valid private key; otherwise, it returns false.

isScalar(Uint8List x) → bool

This function checks whether a Uint8List represents a scalar value. In many cryptographic contexts, scalar values are expected to be 32 bytes long. It returns true if the input Uint8List has a length of 32 bytes, indicating it's a scalar; otherwise, it returns false.

pointAddScalar(Uint8List p, Uint8List tweak, bool compress) → Uint8List?

This method performs point addition with a scalar value and optional compression. It takes a point 'p', a tweak 'tweak', and a boolean 'compress' flag as input. If the inputs are valid, it returns the result of the point addition as a Uint8List. If any input is invalid or if the result is infinity, it returns null.

pointFromScalar(Uint8List d, bool compress) → Uint8List?

reEncodedFromForm(Uint8List p, bool compressed) → Uint8List

This function re-encodes a given Uint8List point representation based on a compression flag. If 'compressed' is true, it ensures that the point representation is compressed. If 'compressed' is false, it ensures that the point representation is uncompressed.