137 lines
3.2 KiB
Go
137 lines
3.2 KiB
Go
package main
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import (
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"bytes"
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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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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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)
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// PKCS7填充
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func PKCS7Padding(ciphertext []byte, blockSize int) []byte {
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padding := blockSize - len(ciphertext)%blockSize
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padtext := bytes.Repeat([]byte{byte(padding)}, padding)
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return append(ciphertext, padtext...)
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}
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// 去除PKCS7填充
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func PKCS7UnPadding(origData []byte) ([]byte, error) {
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length := len(origData)
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if length == 0 {
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return nil, errors.New("input data error")
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}
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unpadding := int(origData[length-1])
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if unpadding > length {
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return nil, errors.New("unpadding size is invalid")
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}
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return origData[:(length - unpadding)], nil
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}
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// AES CBC模式加密，Base64传入传出
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func AesEncrypt(plainText, key []byte) (string, error) {
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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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blockSize := block.BlockSize()
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plainText = PKCS7Padding(plainText, blockSize)
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cipherText := make([]byte, blockSize+len(plainText))
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iv := cipherText[:blockSize] // 使用前blockSize字节作为IV
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_, err = io.ReadFull(rand.Reader, iv)
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if err != nil {
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return "", err
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}
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mode := cipher.NewCBCEncrypter(block, iv)
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mode.CryptBlocks(cipherText[blockSize:], plainText)
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return base64.StdEncoding.EncodeToString(cipherText), nil
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}
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// AES CBC模式解密，Base64传入传出
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func AesDecrypt(cipherTextBase64 string, key []byte) ([]byte, error) {
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cipherText, err := base64.StdEncoding.DecodeString(cipherTextBase64)
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if err != nil {
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return nil, err
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}
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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blockSize := block.BlockSize()
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if len(cipherText) < blockSize {
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return nil, errors.New("ciphertext too short")
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}
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iv := cipherText[:blockSize]
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cipherText = cipherText[blockSize:]
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if len(cipherText)%blockSize != 0 {
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return nil, errors.New("ciphertext is not a multiple of the block size")
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}
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mode := cipher.NewCBCDecrypter(block, iv)
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mode.CryptBlocks(cipherText, cipherText)
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plainText, err := PKCS7UnPadding(cipherText)
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if err != nil {
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return nil, err
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}
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return plainText, nil
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}
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func main() {
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// 定义 AES 密钥
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key, _ := hex.DecodeString("ff83609b2b24fc73196aac3d3dfb874f")
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var data interface{}
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decrypt, err := AesDecrypt("gSSLA3V+MoabjTyPiCvYC6bg7TLk+ja/Zly3R8wjpK/xPC6ZK0QCwdpukGEuUVKdfOU2IU46Q6kSZHXmpF8MdXEa0NKNh85yhlFQVy0U2jJkTxojvoM+1Y/iZlVZpFrx91n7+KdtZkVWkXSZk5eJcizYmLUcaO86ad7PfvQvT4=", key)
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if err != nil {
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fmt.Println("解密错误:", err)
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return
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}
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err = json.Unmarshal(decrypt, &data)
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if err != nil {
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fmt.Println("JSON解析错误:", err)
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return
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}
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// 打印解密后的数据
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fmt.Println("解密后的数据:", decrypt)
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// data = map[string]interface{}{
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// "id_card": "45212220000827423X",
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// "name": "张荣宏",
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// "time_range": "5",
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// "mobile_no": "18276151590",
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// }
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// // 将结构体转为 JSON 字符串
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// jsonData, err := json.Marshal(data)
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// if err != nil {
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// fmt.Println("JSON 序列化错误:", err)
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// return
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// }
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// // 对 JSON 数据进行加密
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// encryptedData, err := AesEncrypt(jsonData, key)
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// if err != nil {
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// fmt.Println("加密错误:", err)
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// return
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// }
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// 输出加密后的结果
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// fmt.Println("加密后的数据:", encryptedData)
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}
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