feat(hash):增加系列校验和算法实现。

hash/crc8/crc8.go

@@ -0,0 +1,73 @@
+// 提供CRC8校验和计算功能。
+package crc8
+
+import (
+	"encoding/hex"
+	"os"
+
+	"github.com/sigurn/crc8"
+)
+
+// 根据提供的校验表名称生成对应的校验表
+func hasherSelect(table string) *crc8.Table {
+	switch table {
+	case "CRC8":
+		return crc8.MakeTable(crc8.CRC8)
+	case "CDMA2000":
+		return crc8.MakeTable(crc8.CRC8_CDMA2000)
+	case "DARC":
+		return crc8.MakeTable(crc8.CRC8_DARC)
+	case "DVB-S2":
+		return crc8.MakeTable(crc8.CRC8_DVB_S2)
+	case "EBU":
+		return crc8.MakeTable(crc8.CRC8_EBU)
+	case "I-CODE":
+		return crc8.MakeTable(crc8.CRC8_I_CODE)
+	case "ITU":
+		return crc8.MakeTable(crc8.CRC8_ITU)
+	case "MAXIM":
+		return crc8.MakeTable(crc8.CRC8_MAXIM)
+	case "ROHC":
+		return crc8.MakeTable(crc8.CRC8_ROHC)
+	case "WCDMA":
+		return crc8.MakeTable(crc8.CRC8_WCDMA)
+	default:
+		return crc8.MakeTable(crc8.CRC8)
+	}
+}
+
+// 计算给定字节数组的CRC8校验和，返回字节数组
+func CRC8(data []byte, table ...string) []byte {
+	crcTable := append(table, "CRC8")
+	return []byte{crc8.Checksum(data, hasherSelect(crcTable[0]))}
+}
+
+// 计算给定字节数组的CRC8校验和，返回十六进制字符串
+func CRC8Hex(data []byte, table ...string) string {
+	return hex.EncodeToString(CRC8(data, table...))
+}
+
+// 计算指定文件的CRC8校验和，返回字节数组
+func SumFile(file string, table ...string) ([]byte, error) {
+	f, err := os.Open(file)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	crcTable := append(table, "CRC8")
+	var buf = make([]byte, 0)
+	if _, err := f.Read(buf); err != nil {
+		return nil, err
+	}
+	return []byte{crc8.Checksum(buf, hasherSelect(crcTable[0]))}, nil
+}
+
+// 计算指定文件的CRC8校验和，返回十六进制字符串
+func SumFileHex(file string, table ...string) (string, error) {
+	crc, err := SumFile(file, table...)
+	if err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(crc), nil
+}