add ignore int to uint

Author: cychuang0924

crypto/elliptic/ed25519prue/edwards25519/field/fe.go

@@ -236,6 +236,7 @@ func (v *Element) bytes(out *[32]byte) []byte {
 	var buf [8]byte
 	for i, l := range [5]uint64{t.l0, t.l1, t.l2, t.l3, t.l4} {
 		bitsOffset := i * 51
+		// #nosec: G115: integer overflow conversion uint64 -> uint
 		byteorder.LePutUint64(buf[:], l<<uint(bitsOffset%8))
 		for i, bb := range buf {
 			off := bitsOffset/8 + i
@@ -256,6 +257,7 @@ func (v *Element) Equal(u *Element) int {
 }
 
 // mask64Bits returns 0xffffffff if cond is 1, and 0 otherwise.
+// #nosec: G115: integer overflow conversion uint64 -> uint64
 func mask64Bits(cond int) uint64 { return ^(uint64(cond) - 1) }
 
 // Select sets v to a if cond == 1, and to b if cond == 0.

crypto/elliptic/ed25519prue/edwards25519/scalar.go

@@ -309,9 +309,11 @@ func (s *Scalar) nonAdjacentForm(w uint) [256]int8 {
 
 		if window < width/2 {
 			carry = 0
+			// #nosec: G115: integer overflow conversion uint64 -> int8
 			naf[pos] = int8(window)
 		} else {
 			carry = 1
+			// #nosec: G115: integer overflow conversion uint64 -> int8
 			naf[pos] = int8(window) - int8(width)
 		}
 

crypto/elliptic/ed25519prue/edwards25519/tables.go

@@ -90,11 +90,13 @@ func (v *nafLookupTable8) FromP3(q *Point) {
 func (v *projLookupTable) SelectInto(dest *projCached, x int8) {
 	// Compute xabs = |x|
 	xmask := x >> 7
+	// #nosec: G115: integer overflow conversion uint64 -> int8
 	xabs := uint8((x + xmask) ^ xmask)
 
 	dest.Zero()
 	for j := 1; j <= 8; j++ {
 		// Set dest = j*Q if |x| = j
+		// #nosec: G115: integer overflow conversion uint64 -> int8
 		cond := subtle.ConstantTimeByteEq(xabs, uint8(j))
 		dest.Select(&v.points[j-1], dest, cond)
 	}
@@ -106,11 +108,13 @@ func (v *projLookupTable) SelectInto(dest *projCached, x int8) {
 func (v *affineLookupTable) SelectInto(dest *affineCached, x int8) {
 	// Compute xabs = |x|
 	xmask := x >> 7
+	// #nosec: G115: integer overflow conversion uint64 -> int8
 	xabs := uint8((x + xmask) ^ xmask)
 
 	dest.Zero()
 	for j := 1; j <= 8; j++ {
 		// Set dest = j*Q if |x| = j
+		// #nosec: G115: integer overflow conversion uint64 -> int8
 		cond := subtle.ConstantTimeByteEq(xabs, uint8(j))
 		dest.Select(&v.points[j-1], dest, cond)
 	}