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64 lines
1.2 KiB
64 lines
1.2 KiB
package crypto
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import (
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"bufio"
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"crypto/hmac"
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"crypto/md5"
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"encoding/hex"
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"fmt"
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"io"
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"os"
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"strings"
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)
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// Md5Check md5 Check method
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func (c *Crypto) Md5Check(content, encrypted string) bool {
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return strings.EqualFold(c.Md5Encode(content), encrypted)
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}
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// Md5Encode md5 Signature function
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func (c *Crypto) Md5Encode(data string) string {
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h := md5.New()
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h.Write([]byte(data))
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return hex.EncodeToString(h.Sum(nil))
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}
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// Md5File return the md5 value of file
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func (c *Crypto) Md5EncodeFile(filename string) (string, error) {
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if fileInfo, err := os.Stat(filename); err != nil {
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return "", err
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} else if fileInfo.IsDir() {
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return "", nil
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}
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file, err := os.Open(filename)
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if err != nil {
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return "", err
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}
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defer file.Close()
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hash := md5.New()
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chunkSize := 65536
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for buf, reader := make([]byte, chunkSize), bufio.NewReader(file); ; {
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n, err := reader.Read(buf)
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if err != nil {
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if err == io.EOF {
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break
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}
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return "", err
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}
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hash.Write(buf[:n])
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}
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checksum := fmt.Sprintf("%x", hash.Sum(nil))
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return checksum, nil
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}
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// Md5Hmac return the hmac hash of string use md5
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func (c *Crypto) Md5Hmac(data, key string) string {
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h := hmac.New(md5.New, []byte(key))
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h.Write([]byte(data))
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return hex.EncodeToString(h.Sum([]byte("")))
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}
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