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Quick Start: Use Go language functions to implement simple data encryption and decryption functions
Quick Start: Use Go language functions to implement simple data encryption and decryption functions
Aug 03, 2023 am 11:29 AM
Quick Start: Use Go language functions to implement simple data encryption and decryption functions
In today's information society, data confidentiality has become particularly important. In order to ensure the confidentiality of data, we usually use various encryption algorithms to encrypt the data. In this article, we will use Go language functions to implement a simple data encryption and decryption function.
First, we need to import the crypto/cipher package in order to use the encryption algorithm. We will use the AES (Advanced Encryption Standard) algorithm to encrypt and decrypt data. The code is as follows:
package main
import (
"crypto/aes"
"crypto/cipher"
"crypto/rand"
"encoding/base64"
"fmt"
"io"
)
// 加密函數(shù)
func encrypt(data []byte, key string) string {
// 創(chuàng)建新的AES加密塊
block, _ := aes.NewCipher([]byte(key))
// 創(chuàng)建一個長度為len(data) + aes.BlockSize的切片
ciphertext := make([]byte, aes.BlockSize+len(data))
// 初始化向量
iv := ciphertext[:aes.BlockSize]
if _, err := io.ReadFull(rand.Reader, iv); err != nil {
panic(err)
}
// 加密數(shù)據(jù)
stream := cipher.NewCFBEncrypter(block, iv)
stream.XORKeyStream(ciphertext[aes.BlockSize:], data)
// 返回加密后的數(shù)據(jù)，使用base64編碼
return base64.URLEncoding.EncodeToString(ciphertext)
}
// 解密函數(shù)
func decrypt(ciphertext string, key string) string {
// 將密文解碼為字節(jié)數(shù)組
data, _ := base64.URLEncoding.DecodeString(ciphertext)
// 分離向量和加密后的數(shù)據(jù)
iv := data[:aes.BlockSize]
data = data[aes.BlockSize:]
// 創(chuàng)建新的AES解密塊
block, _ := aes.NewCipher([]byte(key))
// 解密數(shù)據(jù)
stream := cipher.NewCFBDecrypter(block, iv)
stream.XORKeyStream(data, data)
// 返回解密后的數(shù)據(jù)
return string(data)
}
func main() {
// 原始數(shù)據(jù)
plaintext := "Hello, World!"
// 密鑰
key := "password123"
// 加密數(shù)據(jù)
ciphertext := encrypt([]byte(plaintext), key)
fmt.Printf("加密后的數(shù)據(jù)：%s
", ciphertext)
// 解密數(shù)據(jù)
decryptedText := decrypt(ciphertext, key)
fmt.Printf("解密后的數(shù)據(jù)：%s
", decryptedText)
}In the above code, we define two functions: encrypt and decrypt. The encrypt function accepts a byte array as input and returns a string representation of the encrypted data. The decrypt function accepts a string representation of ciphertext and returns the decrypted original data.
In the main function, we use these two functions to demonstrate the encryption and decryption process. We define a string plaintext as the original data and specify a key key. Then we call the encrypt function to encrypt the original data and print out the ciphertext. Then we call the decrypt function to decrypt the ciphertext and print out the decrypted original data.
Run the above code, we can see the encrypted data and decrypted data. This proves that our encryption and decryption functions are working properly.
In practical applications, we need to pay attention to the security of the key and the transmission security of the ciphertext. It is not safe to store keys in code, it is better to obtain keys from secure storage. At the same time, secure protocols such as HTTPS need to be used when transmitting ciphertext to ensure data confidentiality.
Summary:
In this article, we use Go language functions to implement a simple data encryption and decryption function. By calling the encryption function encrypt and the decryption function decrypt, we can encrypt the data and decrypt it when needed. Of course, this article is just a quick-start tutorial. In actual applications, more complex encryption algorithms and security mechanisms are needed to protect the confidentiality of data.
Code example: https://github.com/example/encryption-golang
The above is the detailed content of Quick Start: Use Go language functions to implement simple data encryption and decryption functions. For more information, please follow other related articles on the PHP Chinese website!
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