X-Git-Url: http://git.osdn.net/view?p=bytom%2Fvapor.git;a=blobdiff_plain;f=crypto%2Fed25519%2Fecmath%2Fscalar.go;fp=crypto%2Fed25519%2Fecmath%2Fscalar.go;h=0000000000000000000000000000000000000000;hp=d3ab1c15eb5ecdddecea7dee9e2f1bcc6e10af88;hb=d09b7a78d44dc259725902b8141cdba0d716b121;hpb=ee01d543fdfe1fd0a4d548965c66f7923ea7b062

diff --git a/crypto/ed25519/ecmath/scalar.go b/crypto/ed25519/ecmath/scalar.go
deleted file mode 100644
index d3ab1c15..00000000
--- a/crypto/ed25519/ecmath/scalar.go
+++ /dev/null
@@ -1,78 +0,0 @@
-package ecmath
-
-import (
-	"crypto/subtle"
-
-	"github.com/vapor/crypto/ed25519/internal/edwards25519"
-)
-
-// Scalar is a 256-bit little-endian scalar.
-type Scalar [32]byte
-
-var (
-	// Zero is the number 0.
-	Zero Scalar
-
-	// One is the number 1.
-	One = Scalar{1}
-
-	// NegOne is the number -1 mod L
-	NegOne = Scalar{
-		0xec, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58,
-		0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14,
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
-	}
-
-	// L is the subgroup order:
-	// 2^252 + 27742317777372353535851937790883648493
-	L = Scalar{
-		0xed, 0xd3, 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58,
-		0xd6, 0x9c, 0xf7, 0xa2, 0xde, 0xf9, 0xde, 0x14,
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10,
-	}
-)
-
-// Add computes x+y (mod L) and places the result in z, returning
-// that. Any or all of x, y, and z may be the same pointer.
-func (z *Scalar) Add(x, y *Scalar) *Scalar {
-	return z.MulAdd(x, &One, y)
-}
-
-// Sub computes x-y (mod L) and places the result in z, returning
-// that. Any or all of x, y, and z may be the same pointer.
-func (z *Scalar) Sub(x, y *Scalar) *Scalar {
-	return z.MulAdd(y, &NegOne, x)
-}
-
-// Neg negates x (mod L) and places the result in z, returning that. X
-// and z may be the same pointer.
-func (z *Scalar) Neg(x *Scalar) *Scalar {
-	return z.MulAdd(x, &NegOne, &Zero)
-}
-
-// MulAdd computes ab+c (mod L) and places the result in z, returning
-// that. Any or all of the pointers may be the same.
-func (z *Scalar) MulAdd(a, b, c *Scalar) *Scalar {
-	edwards25519.ScMulAdd((*[32]byte)(z), (*[32]byte)(a), (*[32]byte)(b), (*[32]byte)(c))
-	return z
-}
-
-func (z *Scalar) Equal(x *Scalar) bool {
-	return subtle.ConstantTimeCompare(x[:], z[:]) == 1
-}
-
-// Prune performs the pruning operation in-place.
-func (z *Scalar) Prune() {
-	z[0] &= 248
-	z[31] &= 127
-	z[31] |= 64
-}
-
-// Reduce takes a 512-bit scalar and reduces it mod L, placing the
-// result in z and returning that.
-func (z *Scalar) Reduce(x *[64]byte) *Scalar {
-	edwards25519.ScReduce((*[32]byte)(z), x)
-	return z
-}