Upgrade CI

.github/workflows/go.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        go-version: [1.16.x, 1.15.x, 1.14.x]
+        go-version: [1.20.x, 1.19.x, 1.18.x]
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
     - name: Set up Go ${{ matrix.go-version }}

go.mod

@@ -1,5 +1,7 @@
 module github.com/minio/sha256-simd
 
-go 1.13
+go 1.17
 
 require github.com/klauspost/cpuid/v2 v2.2.3
+
+require golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e // indirect

sha256.go

@@ -396,17 +396,17 @@ const (
 func (d *digest) MarshalBinary() ([]byte, error) {
 	b := make([]byte, 0, marshaledSize)
 	b = append(b, magic256...)
-	b = binary.BigEndian.AppendUint32(b, d.h[0])
-	b = binary.BigEndian.AppendUint32(b, d.h[1])
-	b = binary.BigEndian.AppendUint32(b, d.h[2])
-	b = binary.BigEndian.AppendUint32(b, d.h[3])
-	b = binary.BigEndian.AppendUint32(b, d.h[4])
-	b = binary.BigEndian.AppendUint32(b, d.h[5])
-	b = binary.BigEndian.AppendUint32(b, d.h[6])
-	b = binary.BigEndian.AppendUint32(b, d.h[7])
+	b = appendUint32(b, d.h[0])
+	b = appendUint32(b, d.h[1])
+	b = appendUint32(b, d.h[2])
+	b = appendUint32(b, d.h[3])
+	b = appendUint32(b, d.h[4])
+	b = appendUint32(b, d.h[5])
+	b = appendUint32(b, d.h[6])
+	b = appendUint32(b, d.h[7])
 	b = append(b, d.x[:d.nx]...)
 	b = b[:len(b)+len(d.x)-d.nx] // already zero
-	b = binary.BigEndian.AppendUint64(b, d.len)
+	b = appendUint64(b, d.len)
 	return b, nil
 }
 
@@ -432,6 +432,28 @@ func (d *digest) UnmarshalBinary(b []byte) error {
 	return nil
 }
 
+func appendUint32(b []byte, v uint32) []byte {
+	return append(b,
+		byte(v>>24),
+		byte(v>>16),
+		byte(v>>8),
+		byte(v),
+	)
+}
+
+func appendUint64(b []byte, v uint64) []byte {
+	return append(b,
+		byte(v>>56),
+		byte(v>>48),
+		byte(v>>40),
+		byte(v>>32),
+		byte(v>>24),
+		byte(v>>16),
+		byte(v>>8),
+		byte(v),
+	)
+}
+
 func consumeUint64(b []byte) ([]byte, uint64) {
 	_ = b[7]
 	x := uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 |