delete the unused (#323)

[bytom/vapor.git] / vendor / github.com / tendermint / ed25519 / ed25519.go

diff --git a/vendor/github.com/tendermint/ed25519/ed25519.go b/vendor/github.com/tendermint/ed25519/ed25519.go
deleted file mode 100644 (file)
index 5a97cde..0000000
--- a/vendor/github.com/tendermint/ed25519/ed25519.go
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package ed25519 implements the Ed25519 signature algorithm. See
-// http://ed25519.cr.yp.to/.
-package ed25519
-
-// This code is a port of the public domain, "ref10" implementation of ed25519
-// from SUPERCOP.
-
-import (
-       "crypto/sha512"
-       "crypto/subtle"
-
-       "github.com/tendermint/ed25519/edwards25519"
-)
-
-const (
-       PublicKeySize  = 32
-       PrivateKeySize = 64
-       SignatureSize  = 64
-)
-
-// MakePublicKey makes a publicKey from the first half of privateKey.
-func MakePublicKey(privateKey *[PrivateKeySize]byte) (publicKey *[PublicKeySize]byte) {
-       publicKey = new([32]byte)
-
-       h := sha512.New()
-       h.Write(privateKey[:32])
-       digest := h.Sum(nil)
-
-       digest[0] &= 248
-       digest[31] &= 127
-       digest[31] |= 64
-
-       var A edwards25519.ExtendedGroupElement
-       var hBytes [32]byte
-       copy(hBytes[:], digest)
-       edwards25519.GeScalarMultBase(&A, &hBytes)
-       A.ToBytes(publicKey)
-
-       copy(privateKey[32:], publicKey[:])
-       return
-}
-
-// Sign signs the message with privateKey and returns a signature.
-func Sign(privateKey *[PrivateKeySize]byte, message []byte) *[SignatureSize]byte {
-       h := sha512.New()
-       h.Write(privateKey[:32])
-
-       var digest1, messageDigest, hramDigest [64]byte
-       var expandedSecretKey [32]byte
-       h.Sum(digest1[:0])
-       copy(expandedSecretKey[:], digest1[:])
-       expandedSecretKey[0] &= 248
-       expandedSecretKey[31] &= 63
-       expandedSecretKey[31] |= 64
-
-       h.Reset()
-       h.Write(digest1[32:])
-       h.Write(message)
-       h.Sum(messageDigest[:0])
-
-       var messageDigestReduced [32]byte
-       edwards25519.ScReduce(&messageDigestReduced, &messageDigest)
-       var R edwards25519.ExtendedGroupElement
-       edwards25519.GeScalarMultBase(&R, &messageDigestReduced)
-
-       var encodedR [32]byte
-       R.ToBytes(&encodedR)
-
-       h.Reset()
-       h.Write(encodedR[:])
-       h.Write(privateKey[32:])
-       h.Write(message)
-       h.Sum(hramDigest[:0])
-       var hramDigestReduced [32]byte
-       edwards25519.ScReduce(&hramDigestReduced, &hramDigest)
-
-       var s [32]byte
-       edwards25519.ScMulAdd(&s, &hramDigestReduced, &expandedSecretKey, &messageDigestReduced)
-
-       signature := new([64]byte)
-       copy(signature[:], encodedR[:])
-       copy(signature[32:], s[:])
-       return signature
-}
-
-// Verify returns true iff sig is a valid signature of message by publicKey.
-func Verify(publicKey *[PublicKeySize]byte, message []byte, sig *[SignatureSize]byte) bool {
-       if sig[63]&224 != 0 {
-               return false
-       }
-
-       var A edwards25519.ExtendedGroupElement
-       if !A.FromBytes(publicKey) {
-               return false
-       }
-       edwards25519.FeNeg(&A.X, &A.X)
-       edwards25519.FeNeg(&A.T, &A.T)
-
-       h := sha512.New()
-       h.Write(sig[:32])
-       h.Write(publicKey[:])
-       h.Write(message)
-       var digest [64]byte
-       h.Sum(digest[:0])
-
-       var hReduced [32]byte
-       edwards25519.ScReduce(&hReduced, &digest)
-
-       var R edwards25519.ProjectiveGroupElement
-       var b [32]byte
-       copy(b[:], sig[32:])
-       edwards25519.GeDoubleScalarMultVartime(&R, &hReduced, &A, &b)
-
-       var checkR [32]byte
-       R.ToBytes(&checkR)
-       return subtle.ConstantTimeCompare(sig[:32], checkR[:]) == 1
-}