Package ecdsa implements the Elliptic Curve Digital Signature Algorithm, as defined in FIPS 186-3.
This implementation derives the nonce from an AES-CTR CSPRNG keyed by ChopMD(256, SHA2-512(priv.D || entropy || hash)). The CSPRNG key is IRO by a result of Coron; the AES-CTR stream is IRO under standard assumptions.
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Sign signs a hash (which should be the result of hashing a larger message) using the private key, priv. If the hash is longer than the bit-length of the private key's curve order, the hash will be truncated to that length. It returns the signature as a pair of integers. The security of the private key depends on the entropy of rand.
Verify verifies the signature in r, s of hash using the public key, pub. Its return value records whether the signature is valid.
PrivateKey represents a ECDSA private key.
func GenerateKey(c elliptic.Curve, rand io.Reader) (*PrivateKey, error)
GenerateKey generates a public and private key pair.
func (priv *PrivateKey) Public() crypto.PublicKey
Public returns the public key corresponding to priv.
func (priv *PrivateKey) Sign(rand io.Reader, msg byte, opts crypto.SignerOpts) (byte, error)
Sign signs msg with priv, reading randomness from rand. This method is intended to support keys where the private part is kept in, for example, a hardware module. Common uses should use the Sign function in this package directly.
PublicKey represents an ECDSA public key.