53 lines
1.1 KiB
Go
53 lines
1.1 KiB
Go
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package bls
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import (
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"fmt"
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ffi "github.com/filecoin-project/filecoin-ffi"
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"github.com/filecoin-project/go-address"
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"github.com/filecoin-project/lotus/chain/types"
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"github.com/filecoin-project/lotus/lib/sigs"
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)
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type blsSigner struct{}
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func (blsSigner) GenPrivate() ([]byte, error) {
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pk := ffi.PrivateKeyGenerate()
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return pk[:], nil
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}
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func (blsSigner) ToPublic(priv []byte) ([]byte, error) {
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var pk ffi.PrivateKey
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copy(pk[:], priv)
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pub := ffi.PrivateKeyPublicKey(pk)
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return pub[:], nil
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}
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func (blsSigner) Sign(p []byte, msg []byte) ([]byte, error) {
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var pk ffi.PrivateKey
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copy(pk[:], p)
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sig := ffi.PrivateKeySign(pk, msg)
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return sig[:], nil
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}
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func (blsSigner) Verify(sig []byte, a address.Address, msg []byte) error {
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digests := []ffi.Digest{ffi.Hash(ffi.Message(msg))}
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var pubk ffi.PublicKey
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copy(pubk[:], a.Payload())
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pubkeys := []ffi.PublicKey{pubk}
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var s ffi.Signature
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copy(s[:], sig)
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if !ffi.Verify(&s, digests, pubkeys) {
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return fmt.Errorf("bls signature failed to verify")
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}
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return nil
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}
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func init() {
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sigs.RegisterSignature(types.KTBLS, blsSigner{})
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}
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