114 lines
2.2 KiB
Go
114 lines
2.2 KiB
Go
package utils
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import (
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"cmii-uav-watchdog-common/models"
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"crypto/sha256"
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"encoding/base64"
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"encoding/json"
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"errors"
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"io"
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)
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// Encrypt 加密字符串
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func Encrypt(plaintext string, key string) (string, error) {
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// 创建hash
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hasher := sha256.New()
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hasher.Write([]byte(key))
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keyBytes := hasher.Sum(nil)
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// 创建cipher
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block, err := aes.NewCipher(keyBytes)
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if err != nil {
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return "", err
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}
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// 创建gcm
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gcm, 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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// 创建nonce
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nonce := make([]byte, gcm.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
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ciphertext := gcm.Seal(nonce, nonce, []byte(plaintext), nil)
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// 编码为base64
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return base64.StdEncoding.EncodeToString(ciphertext), nil
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}
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// Decrypt 解密字符串
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func Decrypt(encrypted string, key string) (string, error) {
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// 解码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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// 创建hash
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hasher := sha256.New()
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hasher.Write([]byte(key))
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keyBytes := hasher.Sum(nil)
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// 创建cipher
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block, err := aes.NewCipher(keyBytes)
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if err != nil {
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return "", err
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}
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// 创建gcm
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gcm, 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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// 检查长度
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if len(ciphertext) < gcm.NonceSize() {
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return "", errors.New("密文太短")
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}
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// 分离nonce和密文
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nonce, ciphertext := ciphertext[:gcm.NonceSize()], ciphertext[gcm.NonceSize():]
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// 解密
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plaintext, err := gcm.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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// EncryptHostInfo 加密主机信息
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func EncryptHostInfo(hostInfo models.HostInfo) (string, error) {
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// 序列化主机信息
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data, err := json.Marshal(hostInfo)
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if err != nil {
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return "", err
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}
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// 计算SHA256作为统一标识
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hasher := sha256.New()
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hasher.Write(data)
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hash := base64.StdEncoding.EncodeToString(hasher.Sum(nil))
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return hash, nil
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}
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// GenerateHostKey 生成主机唯一标识
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func GenerateHostKey(hostInfo models.HostInfo) string {
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// 序列化主机信息
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key := hostInfo.UUID
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if key == "" {
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key = hostInfo.MAC
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}
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return key
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}
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