102 lines
2.2 KiB
Go
102 lines
2.2 KiB
Go
package utils
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/hmac"
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"crypto/rand"
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"io"
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)
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// Encrypt 加密函数
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func Encrypt(text, key string) (string, error) {
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plaintext := []byte(text)
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hashedKey := hashKey(key)
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// 创建一个新的 AES cipher.Block
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block, err := aes.NewCipher(hashedKey)
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if err != nil {
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return "", err
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}
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// 使用 GCM 模式加密
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aesGCM, err := cipher.NewGCM(block)
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if err != nil {
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return "", err
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}
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nonce := make([]byte, aesGCM.NonceSize())
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if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
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return "", err
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}
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// 加密数据
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ciphertext := aesGCM.Seal(nonce, nonce, plaintext, nil)
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return base64.StdEncoding.EncodeToString(ciphertext), nil
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}
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// Decrypt 解密函数
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func Decrypt(cryptoText, key string) (string, error) {
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ciphertext, _ := base64.StdEncoding.DecodeString(cryptoText)
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hashedKey := hashKey(key)
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// 创建一个新的 AES cipher.Block
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block, err := aes.NewCipher(hashedKey)
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if err != nil {
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return "", err
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}
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// 使用 GCM 模式解密
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aesGCM, err := cipher.NewGCM(block)
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if err != nil {
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return "", err
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}
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nonceSize := aesGCM.NonceSize()
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nonce, ciphertext := ciphertext[:nonceSize], ciphertext[nonceSize:]
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// 解密数据
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plaintext, err := aesGCM.Open(nil, nonce, ciphertext, nil)
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if err != nil {
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return "", err
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}
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return string(plaintext), nil
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}
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// HashString 使用SHA256算法对字符串进行哈希加密
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func HashString(s string) string {
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// 创建一个新的SHA256哈希实例
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hasher := sha256.New()
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// 写入要哈希的字符串的字节
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hasher.Write([]byte(s))
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// 获取哈希结果的字节切片
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hashBytes := hasher.Sum(nil)
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// 将字节切片转换成十六进制字符串表示
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s = hex.EncodeToString(hashBytes)
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return s
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}
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// HmacSHA256 计算 HMAC-SHA256 签名
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func HmacSHA256(data string, key string) string {
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// 创建新的 HMAC 使用 SHA256 哈希函数
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h := hmac.New(sha256.New, []byte(key))
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// 写入数据
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h.Write([]byte(data))
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// 计算 HMAC-SHA256 并返回其字节切片
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return hex.EncodeToString(h.Sum(nil))
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}
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// 将任意长度的密钥转换为适合 AES 的长度（32 字节）
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func hashKey(key string) []byte {
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hash := sha256.Sum256([]byte(key))
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return hash[:]
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}
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