65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
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package utils
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"encoding/base64"
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"errors"
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"fmt"
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"io"
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)
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// 将整数转换为固定长度的字符串
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func intToFixedLengthString(num int, length int) string {
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return fmt.Sprintf("%0*d", length, num)
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}
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// 加密函数
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func IDEncrypt(plainText, key string) (string, error) {
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block, err := aes.NewCipher([]byte(key))
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if err != nil {
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return "", err
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}
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plainTextBytes := []byte(plainText)
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cipherText := make([]byte, aes.BlockSize+len(plainTextBytes))
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iv := cipherText[:aes.BlockSize]
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if _, err := io.ReadFull(rand.Reader, iv); err != nil {
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return "", err
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}
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stream := cipher.NewCFBEncrypter(block, iv)
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stream.XORKeyStream(cipherText[aes.BlockSize:], plainTextBytes)
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// 使用URL安全的Base64编码
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encrypted := base64.URLEncoding.EncodeToString(cipherText)
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return encrypted, nil
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}
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// 解密函数
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func IDDecrypt(encryptedText, key string) (string, error) {
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cipherText, err := base64.URLEncoding.DecodeString(encryptedText)
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if err != nil {
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return "", err
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}
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block, err := aes.NewCipher([]byte(key))
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if err != nil {
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return "", err
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}
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if len(cipherText) < aes.BlockSize {
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return "", errors.New("cipherText too short")
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}
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iv := cipherText[:aes.BlockSize]
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cipherText = cipherText[aes.BlockSize:]
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stream := cipher.NewCFBDecrypter(block, iv)
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stream.XORKeyStream(cipherText, cipherText)
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return string(cipherText), nil
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}
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