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84 lines
2.1 KiB
84 lines
2.1 KiB
package bls
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import (
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"bytes"
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"encoding/hex"
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"math/big"
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"github.com/harmony-one/bls/ffi/go/bls"
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"github.com/pkg/errors"
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)
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var (
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emptyBLSPubKey = SerializedPublicKey{}
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)
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// PublicKeySizeInBytes ..
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const (
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PublicKeySizeInBytes = 48
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BLSSignatureSizeInBytes = 96
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)
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// PrivateKeyWrapper combines the bls private key and the corresponding public key
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type PrivateKeyWrapper struct {
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Pri *bls.SecretKey
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Pub *PublicKeyWrapper
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}
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// PublicKeyWrapper defines the bls public key in both serialized and
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// deserialized form.
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type PublicKeyWrapper struct {
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Bytes SerializedPublicKey
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Object *bls.PublicKey
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}
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// SerializedPublicKey defines the serialized bls public key
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type SerializedPublicKey [PublicKeySizeInBytes]byte
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// SerializedSignature defines the bls signature
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type SerializedSignature [BLSSignatureSizeInBytes]byte
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// Big ..
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func (pk SerializedPublicKey) Big() *big.Int {
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return new(big.Int).SetBytes(pk[:])
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}
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// IsEmpty returns whether the bls public key is empty 0 bytes
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func (pk SerializedPublicKey) IsEmpty() bool {
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return bytes.Equal(pk[:], emptyBLSPubKey[:])
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}
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// Hex returns the hex string of bls public key
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func (pk SerializedPublicKey) Hex() string {
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return hex.EncodeToString(pk[:])
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}
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// MarshalText so that we can use this as JSON printable when used as
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// key in a map
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func (pk SerializedPublicKey) MarshalText() (text []byte, err error) {
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text = make([]byte, BLSSignatureSizeInBytes)
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hex.Encode(text, pk[:])
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return text, nil
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}
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// FromLibBLSPublicKeyUnsafe could give back nil, use only in cases when
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// have invariant that return value won't be nil
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func FromLibBLSPublicKeyUnsafe(key *bls.PublicKey) *SerializedPublicKey {
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result := &SerializedPublicKey{}
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if err := result.FromLibBLSPublicKey(key); err != nil {
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return nil
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}
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return result
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}
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// FromLibBLSPublicKey replaces the key contents with the given key,
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func (pk *SerializedPublicKey) FromLibBLSPublicKey(key *bls.PublicKey) error {
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bytes := key.Serialize()
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if len(bytes) != len(pk) {
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return errors.Errorf(
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"key size (BLS) size mismatch, expected %d have %d", len(pk), len(bytes),
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)
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}
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copy(pk[:], bytes)
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return nil
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}
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