101 lines
2.3 KiB
Go
101 lines
2.3 KiB
Go
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package crypto
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import (
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"fmt"
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"io"
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btcec "github.com/btcsuite/btcd/btcec"
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proto "github.com/gogo/protobuf/proto"
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pb "github.com/libp2p/go-libp2p-crypto/pb"
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sha256 "github.com/minio/sha256-simd"
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)
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type Secp256k1PrivateKey btcec.PrivateKey
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type Secp256k1PublicKey btcec.PublicKey
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func GenerateSecp256k1Key(src io.Reader) (PrivKey, PubKey, error) {
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privk, err := btcec.NewPrivateKey(btcec.S256())
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if err != nil {
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return nil, nil, err
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}
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k := (*Secp256k1PrivateKey)(privk)
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return k, k.GetPublic(), nil
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}
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func UnmarshalSecp256k1PrivateKey(data []byte) (PrivKey, error) {
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if len(data) != btcec.PrivKeyBytesLen {
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return nil, fmt.Errorf("expected secp256k1 data size to be %d", btcec.PrivKeyBytesLen)
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}
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privk, _ := btcec.PrivKeyFromBytes(btcec.S256(), data)
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return (*Secp256k1PrivateKey)(privk), nil
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}
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func UnmarshalSecp256k1PublicKey(data []byte) (PubKey, error) {
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k, err := btcec.ParsePubKey(data, btcec.S256())
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if err != nil {
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return nil, err
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}
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return (*Secp256k1PublicKey)(k), nil
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}
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func (k *Secp256k1PrivateKey) Bytes() ([]byte, error) {
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pbmes := new(pb.PrivateKey)
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typ := pb.KeyType_Secp256k1
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pbmes.Type = &typ
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pbmes.Data = (*btcec.PrivateKey)(k).Serialize()
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return proto.Marshal(pbmes)
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}
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func (k *Secp256k1PrivateKey) Equals(o Key) bool {
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sk, ok := o.(*Secp256k1PrivateKey)
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if !ok {
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return false
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}
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return k.D.Cmp(sk.D) == 0
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}
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func (k *Secp256k1PrivateKey) Sign(data []byte) ([]byte, error) {
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hash := sha256.Sum256(data)
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sig, err := (*btcec.PrivateKey)(k).Sign(hash[:])
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if err != nil {
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return nil, err
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}
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return sig.Serialize(), nil
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}
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func (k *Secp256k1PrivateKey) GetPublic() PubKey {
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return (*Secp256k1PublicKey)((*btcec.PrivateKey)(k).PubKey())
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}
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func (k *Secp256k1PublicKey) Bytes() ([]byte, error) {
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pbmes := new(pb.PublicKey)
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typ := pb.KeyType_Secp256k1
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pbmes.Type = &typ
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pbmes.Data = (*btcec.PublicKey)(k).SerializeCompressed()
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return proto.Marshal(pbmes)
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}
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func (k *Secp256k1PublicKey) Equals(o Key) bool {
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sk, ok := o.(*Secp256k1PublicKey)
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if !ok {
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return false
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}
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return (*btcec.PublicKey)(k).IsEqual((*btcec.PublicKey)(sk))
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}
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func (k *Secp256k1PublicKey) Verify(data []byte, sigStr []byte) (bool, error) {
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sig, err := btcec.ParseDERSignature(sigStr, btcec.S256())
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if err != nil {
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return false, err
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}
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hash := sha256.Sum256(data)
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return sig.Verify(hash[:], (*btcec.PublicKey)(k)), nil
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}
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