Method for external encryption of data in MySQL database using Go language

With the continuous occurrence of data breaches, data security issues have received increasing attention. The data stored in the database is very important, so data encryption has become an important means of security protection. This article will introduce how to use Go language to perform external encryption of data in MySQL database, thereby improving data security.

1. What is data external encryption

In the traditional encryption method, the data is encrypted and stored in the database, and needs to be decrypted when querying and using the data. External data encryption encrypts data on the client before it is input into the database to ensure that the data will not be stolen or tampered with by middlemen during transmission. In addition, external encryption of data can prevent data snooping and malicious tampering by database administrators.

2. Go language encryption library

Go language encryption library provides a variety of encryption algorithms, including AES, DES, RSA, SHA-1, etc. When encrypting data, we can choose different algorithms according to needs to ensure data security.

The Go language encryption library provides two encryption modes: block encryption mode and stream encryption mode. Block encryption mode works by encrypting the plaintext in blocks, using a separate key for encryption within each block. The stream encryption mode continuously generates a streaming output of ciphertext by inputting the plaintext and key together into the encryption function. Among them, the block encryption algorithm is more widely used.

3. Use Go language to externally encrypt data in MySQL

Here, we will use Go language to externally encrypt the data in MySQL database. First, the data is encrypted on the client, and then the encrypted data is input into the MySQL database. The specific implementation steps are as follows:

1. Install the Go language package

Before performing encryption operations, you need to install the Go language package. Open the terminal and enter the following command to install:

go get -u github.com/go-sql-driver/mysql

go get -u golang.org/x/crypto

2. Write code

Next, we need to write code in the Go language to encrypt the input plaintext data. Here is a sample code example:

package main

import (
    "crypto/aes"
    "crypto/cipher"
    "database/sql"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
    "log"
)

func main() {
    // 连接MySQL数据库
    db, err := sql.Open("mysql", "user:password@tcp(ip:port)/dbname")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    // 加密秘钥
    key := []byte("1234567891234567")

    // 待加密的明文
    plaintext := []byte("Hello, World!")

    // 加密块
    block, err := aes.NewCipher(key)
    if err != nil {
        log.Fatal(err)
    }

    // 分组加密模式
    ciphertext := make([]byte, aes.BlockSize+len(plaintext))
    iv := ciphertext[:aes.BlockSize]
    if _, err := rand.Read(iv); err != nil {
        log.Fatal(err)
    }

    stream := cipher.NewCFBEncrypter(block, iv)
    stream.XORKeyStream(ciphertext[aes.BlockSize:], plaintext)

    // 将加密后的数据插入到数据库中
    _, err = db.Exec("INSERT INTO your_table (content) VALUES (?)", ciphertext[aes.BlockSize:])
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("Data encrypted and stored successfully!")
}

In the code, we first connect to the database, then set the encryption key and enter the plaintext data. Next, we use the AES algorithm to perform block encryption and insert the encrypted data into the MySQL database. It should be noted that we need to store the encrypted data in a binary type field so that the data can be restored correctly when decrypted.

4. Summary

Data security is an important task, and data encryption is an important means to ensure data security. This article introduces how to use Go language to externally encrypt data in MySQL database to ensure the security of data during transmission and storage. I hope this article can be helpful to readers and improve their data security awareness and skills.

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