Further restructure

pkg/utils/crypto/sha256/sha256.go

@@ -0,0 +1,59 @@
+// +build amd64
+
+package sha256
+
+// #include <stdint.h>
+// void sha256_transform_avx (uint8_t *input_data, uint32_t digest[8], uint64_t num_blks);
+// void sha256_transform_ssse3 (uint8_t *input_data, uint32_t digest[8], uint64_t num_blks);
+// void sha256_transform_rorx (uint8_t *input_data, uint32_t digest[8], uint64_t num_blks);
+// #define SHA256_DIGEST_SIZE      32
+// #define SHA256_BLOCK_SIZE       64
+// #define SHA256_H0       0x6a09e667UL
+// #define SHA256_H1       0xbb67ae85UL
+// #define SHA256_H2       0x3c6ef372UL
+// #define SHA256_H3       0xa54ff53aUL
+// #define SHA256_H4       0x510e527fUL
+// #define SHA256_H5       0x9b05688cUL
+// #define SHA256_H6       0x1f83d9abUL
+// #define SHA256_H7       0x5be0cd19UL
+import "C"
+import (
+	gosha256 "crypto/sha256"
+	"io"
+)
+
+/*
+func Sha256(buffer []byte) ([]uint32, error) {
+
+	if cpu.HasSSE41() {
+		C.sha256_transform_ssse3()
+		return 0, nil
+	}
+
+	if cpu.HasAVX() {
+		C.sha256_transform_avx()
+		return 0, nil
+	}
+
+	if cpu.HasAVX2() {
+		C.sha256_transform_rorx()
+		return 0, nil
+	}
+}
+*/
+
+func Sum(reader io.Reader) ([]byte, error) {
+	hash := gosha256.New()
+	var err error
+	for err == nil {
+		length := 0
+		byteBuffer := make([]byte, 1024*1024)
+		length, err = reader.Read(byteBuffer)
+		byteBuffer = byteBuffer[0:length]
+		hash.Write(byteBuffer)
+	}
+	if err != io.EOF {
+		return nil, err
+	}
+	return hash.Sum(nil), nil
+}