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signrpc: use DigestSigner interface for signing

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This commit is contained in:
Oliver Gugger 2020-04-28 10:06:34 +02:00
parent 4003f25281
commit 08d6a61e2a
No known key found for this signature in database
GPG Key ID: 8E4256593F177720
1 changed files with 9 additions and 12 deletions
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21
lnrpc/signrpc/signer_server.go
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@ -414,24 +414,21 @@ func (s *Server) SignMessage(ctx context.Context,
return nil, fmt.Errorf("a key locator MUST be passed in")
}
// Derive the private key we'll be using for signing.
keyLocator := keychain.KeyLocator{
Family: keychain.KeyFamily(in.KeyLoc.KeyFamily),
Index: uint32(in.KeyLoc.KeyIndex),
}
privKey, err := s.cfg.KeyRing.DerivePrivKey(keychain.KeyDescriptor{
KeyLocator: keyLocator,
})
if err != nil {
return nil, fmt.Errorf("can't derive private key: %v", err)
// Describe the private key we'll be using for signing.
keyDescriptor := keychain.KeyDescriptor{
KeyLocator: keychain.KeyLocator{
Family: keychain.KeyFamily(in.KeyLoc.KeyFamily),
Index: uint32(in.KeyLoc.KeyIndex),
},
}
// The signature is over the sha256 hash of the message.
digest := chainhash.HashB(in.Msg)
var digest [32]byte
copy(digest[:], chainhash.HashB(in.Msg))
// Create the raw ECDSA signature first and convert it to the final wire
// format after.
sig, err := privKey.Sign(digest)
sig, err := s.cfg.KeyRing.SignDigest(keyDescriptor, digest)
if err != nil {
return nil, fmt.Errorf("can't sign the hash: %v", err)
}