delete the unused (#323)

[bytom/vapor.git] / vendor / github.com / bytom / crypto / ed25519 / ecmath / scalar.go

diff --git a/vendor/github.com/bytom/crypto/ed25519/ecmath/scalar.go b/vendor/github.com/bytom/crypto/ed25519/ecmath/scalar.go
deleted file mode 100644 (file)
index 651f2ca..0000000
--- a/vendor/github.com/bytom/crypto/ed25519/ecmath/scalar.go
+++ /dev/null
@@ -1,78 +0,0 @@
-package ecmath
-
-import (
-       "crypto/subtle"
-
-       "github.com/bytom/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
-}