93 lines
1.9 KiB
Go
93 lines
1.9 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/rand"
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"encoding/base64"
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"errors"
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"io"
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)
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// AESKey 从环境变量或配置中获取，这里使用默认密钥（生产环境应该从配置读取）
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var defaultAESKey = []byte("your-32-byte-secret-key-here!!") // 32 bytes for AES-256
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// GetAESKey 获取AES密钥（应该从配置文件或环境变量读取）
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func GetAESKey() []byte {
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// TODO: 从配置文件或环境变量读取密钥
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// key := os.Getenv("AES_ENCRYPTION_KEY")
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// if key == "" {
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// return defaultAESKey
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// }
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// return []byte(key)
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return defaultAESKey
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}
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// EncryptAES 使用AES-256-GCM加密数据
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func EncryptAES(plaintext string) (string, error) {
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key := GetAESKey()
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// Create cipher block
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block, err := aes.NewCipher(key)
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if err != nil {
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return "", err
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}
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// Create GCM
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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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// Create nonce
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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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// Encrypt
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ciphertext := aesGCM.Seal(nonce, nonce, []byte(plaintext), nil)
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// Encode to base64
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return base64.StdEncoding.EncodeToString(ciphertext), nil
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}
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// DecryptAES 使用AES-256-GCM解密数据
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func DecryptAES(encrypted string) (string, error) {
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key := GetAESKey()
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// Decode from base64
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ciphertext, err := base64.StdEncoding.DecodeString(encrypted)
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if err != nil {
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return "", err
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}
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// Create cipher block
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block, err := aes.NewCipher(key)
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if err != nil {
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return "", err
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}
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// Create GCM
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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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// Extract nonce
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nonceSize := aesGCM.NonceSize()
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if len(ciphertext) < nonceSize {
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return "", errors.New("ciphertext too short")
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}
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nonce, ciphertext := ciphertext[:nonceSize], ciphertext[nonceSize:]
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// Decrypt
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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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