For the complete documentation index, see llms.txt.
aztec-nr - std::ecdsa_secp256k1

Function verify_signature

pub fn verify_signature(
    public_key_x: [u8; 32],
    public_key_y: [u8; 32],
    signature: [u8; 64],
    message_hash: [u8; 32],
) -> bool

Verifies a ECDSA signature over the secp256k1 curve.

  • inputs:
    • x coordinate of public key as 32 bytes
    • y coordinate of public key as 32 bytes
    • the signature, as a 64 bytes array The signature internally will be represented as (r, s), where r and s are fixed-sized big endian scalar values. As the secp256k1 has a 256-bit modulus, we have a 64 byte signature while r and s will both be 32 bytes. We expect s to be normalized. This means given the curve's order, s should be less than or equal to order / 2. This is done to prevent malleability. For more context regarding malleability you can reference BIP 0062.
    • the hash of the message, as a vector of bytes
  • output: false for failure and true for success