GO NewCFBDecrypter用法及代码示例

GO语言"crypto/cipher"包中"NewCFBDecrypter"函数的用法及代码示例。

用法:

func NewCFBDecrypter(block Block, iv []byte) Stream

NewCFBDecrypter 返回一个使用给定块以密码反馈模式解密的流。 iv 的长度必须与 Block 的块大小相同。

例子：

package main

import (
	"crypto/aes"
	"crypto/cipher"
	"encoding/hex"
	"fmt"
)

func main() {
	// Load your secret key from a safe place and reuse it across multiple
	// NewCipher calls. (Obviously don't use this example key for anything
	// real.) If you want to convert a passphrase to a key, use a suitable
	// package like bcrypt or scrypt.
	key, _ := hex.DecodeString("6368616e676520746869732070617373")
	ciphertext, _ := hex.DecodeString("7dd015f06bec7f1b8f6559dad89f4131da62261786845100056b353194ad")

	block, err := aes.NewCipher(key)
	if err != nil {
		panic(err)
	}

	// The IV needs to be unique, but not secure. Therefore it's common to
	// include it at the beginning of the ciphertext.
	if len(ciphertext) < aes.BlockSize {
		panic("ciphertext too short")
	}
	iv := ciphertext[:aes.BlockSize]
	ciphertext = ciphertext[aes.BlockSize:]

	stream := cipher.NewCFBDecrypter(block, iv)

	// XORKeyStream can work in-place if the two arguments are the same.
	stream.XORKeyStream(ciphertext, ciphertext)
	fmt.Printf("%s", ciphertext)
}

输出：

some plaintext

相关用法

注：本文由纯净天空筛选整理自golang.google.cn大神的英文原创作品 NewCFBDecrypter。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。