diff options
Diffstat (limited to 'vendor/github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa/ecdsa.go')
-rw-r--r-- | vendor/github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa/ecdsa.go | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/vendor/github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa/ecdsa.go b/vendor/github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa/ecdsa.go deleted file mode 100644 index 82e4dca4b..000000000 --- a/vendor/github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa/ecdsa.go +++ /dev/null @@ -1,133 +0,0 @@ -// Copyright 2018 The dexon-consensus Authors -// This file is part of the dexon-consensus library. -// -// The dexon-consensus library is free software: you can redistribute it -// and/or modify it under the terms of the GNU Lesser General Public License as -// published by the Free Software Foundation, either version 3 of the License, -// or (at your option) any later version. -// -// The dexon-consensus library is distributed in the hope that it will be -// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser -// General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the dexon-consensus library. If not, see -// <http://www.gnu.org/licenses/>. - -package ecdsa - -import ( - "crypto/ecdsa" - - dexCrypto "github.com/dexon-foundation/dexon/crypto" - - "github.com/dexon-foundation/dexon-consensus/common" - "github.com/dexon-foundation/dexon-consensus/core/crypto" -) - -const cryptoType = "ecdsa" - -func init() { - crypto.RegisterSigToPub(cryptoType, SigToPub) -} - -// PrivateKey represents a private key structure used in geth and implments -// Crypto.PrivateKey interface. -type PrivateKey struct { - privateKey *ecdsa.PrivateKey -} - -// PublicKey represents a public key structure used in geth and implements -// Crypto.PublicKey interface. -type PublicKey struct { - publicKey *ecdsa.PublicKey -} - -// NewPrivateKey creates a new PrivateKey structure. -func NewPrivateKey() (*PrivateKey, error) { - key, err := dexCrypto.GenerateKey() - if err != nil { - return nil, err - } - return &PrivateKey{privateKey: key}, nil -} - -// NewPrivateKeyFromECDSA creates a new PrivateKey structure from -// ecdsa.PrivateKey. -func NewPrivateKeyFromECDSA(key *ecdsa.PrivateKey) *PrivateKey { - return &PrivateKey{privateKey: key} -} - -// NewPublicKeyFromECDSA creates a new PublicKey structure from -// ecdsa.PublicKey. -func NewPublicKeyFromECDSA(key *ecdsa.PublicKey) *PublicKey { - return &PublicKey{publicKey: key} -} - -// NewPublicKeyFromByteSlice constructs an eth.publicKey instance from -// a byte slice. -func NewPublicKeyFromByteSlice(b []byte) (crypto.PublicKey, error) { - pub, err := dexCrypto.UnmarshalPubkey(b) - if err != nil { - return &PublicKey{}, err - } - return &PublicKey{publicKey: pub}, nil -} - -// PublicKey returns the public key associate this private key. -func (prv *PrivateKey) PublicKey() crypto.PublicKey { - return NewPublicKeyFromECDSA(&(prv.privateKey.PublicKey)) -} - -// Sign calculates an ECDSA signature. -// -// This function is susceptible to chosen plaintext attacks that can leak -// information about the private key that is used for signing. Callers must -// be aware that the given hash cannot be chosen by an adversery. Common -// solution is to hash any input before calculating the signature. -// -// The produced signature is in the [R || S || V] format where V is 0 or 1. -func (prv *PrivateKey) Sign(hash common.Hash) ( - sig crypto.Signature, err error) { - s, err := dexCrypto.Sign(hash[:], prv.privateKey) - sig = crypto.Signature{ - Type: cryptoType, - Signature: s, - } - return -} - -// VerifySignature checks that the given public key created signature over hash. -// The public key should be in compressed (33 bytes) or uncompressed (65 bytes) -// format. -// The signature should have the 64 byte [R || S] format. -func (pub *PublicKey) VerifySignature( - hash common.Hash, signature crypto.Signature) bool { - sig := signature.Signature - if len(sig) == 65 { - // The last byte is for ecrecover. - sig = sig[:64] - } - return dexCrypto.VerifySignature(pub.Bytes(), hash[:], sig) -} - -// Compress encodes a public key to the 33-byte compressed format. -func (pub *PublicKey) Compress() []byte { - return dexCrypto.CompressPubkey(pub.publicKey) -} - -// Bytes returns the []byte representation of uncompressed public key. (65 bytes) -func (pub *PublicKey) Bytes() []byte { - return dexCrypto.FromECDSAPub(pub.publicKey) -} - -// SigToPub returns the PublicKey that created the given signature. -func SigToPub( - hash common.Hash, signature crypto.Signature) (crypto.PublicKey, error) { - key, err := dexCrypto.SigToPub(hash[:], signature.Signature[:]) - if err != nil { - return &PublicKey{}, err - } - return &PublicKey{publicKey: key}, nil -} |