Module p256

Expand description

P-256 (secp256r1) ECDSA and ECDH.

See SecretKey and PublicKey for the signing, verification and key agreement APIs.

Structs§

ECDH_SHARED_SECRET_SIZE: Size of the raw ECDH shared secret in bytes (32 bytes). Must not be used directly as an encryption key; apply a KDF first.
PUBLIC_KEY_COMPRESSED_SIZE: Size of a compressed P-256 public key in bytes (33 bytes, includes 0x02/0x03 prefix).
PUBLIC_KEY_UNCOMPRESSED_SIZE: Size of an uncompressed P-256 public key in bytes (65 bytes, includes 0x04 prefix).
SECRET_KEY_SIZE: Size of a P-256 secret key in bytes (32 bytes).
SIGNATURE_SIZE: Size of a P-256 ECDSA signature in bytes (64 bytes, r || s).

is_valid_public_key: Returns true when public_key is a valid SEC1 encoding of a point on the P-256 curve.