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package libs
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"encoding/base64"
"fmt"
"io"
"time"
)
// GenerateAESKey 生成AES密钥,基于时间戳和标志字符串
func GenerateAESKey(startTime time.Time, endTime time.Time, flag string) ([]byte, error) {
// 这里简单地将时间戳和标志字符串连接起来生成密钥,实际应用中应使用更安全的方式生成密钥
keyMaterial := fmt.Sprintf("%d-%d-%s", startTime.Unix(), endTime.Unix(), flag)
return []byte(keyMaterial)[:16], nil // AES-128需要16字节的密钥
}
// EncryptWithAES 使用AES加密数据
func EncryptWithAES(data []byte, key []byte) ([]byte, error) {
block, err := aes.NewCipher(key)
if err != nil {
return nil, err
}
ciphertext := make([]byte, aes.BlockSize+len(data))
iv := ciphertext[:aes.BlockSize]
if _, err := io.ReadFull(rand.Reader, iv); err != nil {
return nil, err
}
stream := cipher.NewCFBEncrypter(block, iv)
stream.XORKeyStream(ciphertext[aes.BlockSize:], data)
return ciphertext, nil
}
func GenerateEncryptedJSONInfo(startTime time.Time, endTime time.Time, flag string, systemInfoBase64String string) (string, error) {
// 解析Base64编码的系统信息字符串为字节切片
decodedBytes, err := base64.StdEncoding.DecodeString(systemInfoBase64String)
if err != nil {
return "", err
}
// 生成AES密钥
aesKey, err := GenerateAESKey(startTime, endTime, flag)
if err != nil {
return "", err
}
// 使用AES加密JSON数据
encryptedBytes, err := EncryptWithAES(decodedBytes, aesKey)
if err != nil {
return "", err
}
// 对加密后的数据进行Base64编码以便于传输和存储
encodedInfo := base64.StdEncoding.EncodeToString(encryptedBytes)
return encodedInfo, nil
}