怎么使用Go语言实现加密和解密操作

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在 Go 语言中，可以使用 crypto 包来实现加密和解密操作。下面是一个简单的示例，演示如何使用 Go 语言进行 AES 加密和解密操作：

package main

import ("crypto/aes"
	"crypto/cipher"
	"crypto/rand"
	"encoding/base64"
	"fmt"
	"io"
)

func encrypt(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
	}

	mode := cipher.NewCBCEncrypter(block, iv)
	mode.CryptBlocks(ciphertext[aes.BlockSize:], data)

	return ciphertext, nil
}

func decrypt(data []byte, key []byte) ([]byte, error) {block, err := aes.NewCipher(key)
	if err != nil {return nil, err
	}

	if len(data) < aes.BlockSize {return nil, fmt.Errorf("ciphertext too short")
	}

	iv := data[:aes.BlockSize]
	data = data[aes.BlockSize:]

	mode := cipher.NewCBCDecrypter(block, iv)
	mode.CryptBlocks(data, data)

	return data, nil
}

func main() {key := []byte("thisisasecretkey")

	originalData := []byte("hello world")

	encryptedData, err := encrypt(originalData, key)
	if err != nil {fmt.Println("Error encrypting data:", err)
		return
	}

	fmt.Println("Encrypted data:", base64.StdEncoding.EncodeToString(encryptedData))

	decryptedData, err := decrypt(encryptedData, key)
	if err != nil {fmt.Println("Error decrypting data:", err)
		return
	}

	fmt.Println("Decrypted data:", string(decryptedData))
}