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nodeSigner: add method for signing already hashed data

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This commit is contained in:
Johan T. Halseth 2017-09-05 17:56:36 +02:00
parent 0086e6e427
commit 07ea3e039f
No known key found for this signature in database
GPG Key ID: 15BAADA29DA20D26
1 changed files with 10 additions and 4 deletions
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14
nodesigner.go
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@ -53,18 +53,24 @@ func (n *nodeSigner) SignMessage(pubKey *btcec.PublicKey,
// resident node's private key. The returned signature is a pubkey-recoverable // resident node's private key. The returned signature is a pubkey-recoverable
// signature. // signature.
func (n *nodeSigner) SignCompact(msg []byte) ([]byte, error) { func (n *nodeSigner) SignCompact(msg []byte) ([]byte, error) {
// We'll sign the dsha256 of the target message.
// Otherwise, we'll sign the dsha256 of the target message.
digest := chainhash.DoubleHashB(msg) digest := chainhash.DoubleHashB(msg)
return n.SignDigestCompact(digest)
}
// SignDigestCompact signs the provided message digest under the resident
// node's private key. The returned signature is a pubkey-recoverable signature.
func (n *nodeSigner) SignDigestCompact(hash []byte) ([]byte, error) {
// Should the signature reference a compressed public key or not. // Should the signature reference a compressed public key or not.
isCompressedKey := true isCompressedKey := true
// btcec.SignCompact returns a pubkey-recoverable signature // btcec.SignCompact returns a pubkey-recoverable signature
sig, err := btcec.SignCompact(btcec.S256(), n.privKey, digest, sig, err := btcec.SignCompact(btcec.S256(), n.privKey, hash,
isCompressedKey) isCompressedKey)
if err != nil { if err != nil {
return nil, fmt.Errorf("can't sign the message: %v", err) return nil, fmt.Errorf("can't sign the hash: %v", err)
} }
return sig, nil return sig, nil