package sr25519 import ( "bytes" "fmt" "github.com/tendermint/tendermint/crypto" "github.com/tendermint/tendermint/crypto/tmhash" schnorrkel "github.com/ChainSafe/go-schnorrkel" ) var _ crypto.PubKey = PubKey{} // PubKeySize is the number of bytes in an Sr25519 public key. const ( PubKeySize = 32 KeyType = "sr25519" ) // PubKeySr25519 implements crypto.PubKey for the Sr25519 signature scheme. type PubKey []byte // Address is the SHA256-20 of the raw pubkey bytes. func (pubKey PubKey) Address() crypto.Address { return crypto.Address(tmhash.SumTruncated(pubKey[:])) } // Bytes returns the byte representation of the PubKey. func (pubKey PubKey) Bytes() []byte { return []byte(pubKey) } func (pubKey PubKey) VerifySignature(msg []byte, sig []byte) bool { // make sure we use the same algorithm to sign if len(sig) != SignatureSize { return false } var sig64 [SignatureSize]byte copy(sig64[:], sig) publicKey := &(schnorrkel.PublicKey{}) var p [PubKeySize]byte copy(p[:], pubKey) err := publicKey.Decode(p) if err != nil { return false } signingContext := schnorrkel.NewSigningContext([]byte{}, msg) signature := &(schnorrkel.Signature{}) err = signature.Decode(sig64) if err != nil { return false } return publicKey.Verify(signature, signingContext) } func (pubKey PubKey) String() string { return fmt.Sprintf("PubKeySr25519{%X}", []byte(pubKey)) } // Equals - checks that two public keys are the same time // Runs in constant time based on length of the keys. func (pubKey PubKey) Equals(other crypto.PubKey) bool { if otherEd, ok := other.(PubKey); ok { return bytes.Equal(pubKey[:], otherEd[:]) } return false } func (pubKey PubKey) Type() string { return KeyType }