Golang:如何使用DES和CBC加密长度为5个字符的纯文本? [英] Golang: How do I encrypt plain text that is 5 characters long with DES and CBC?

查看:236
本文介绍了Golang:如何使用DES和CBC加密长度为5个字符的纯文本?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

目前试图将长度为5个字符的明文加密成12个字符的加密字符串。我希望能够指定一个独特的IV(不是随机生成的),一个唯一的密钥,并使用DES。我目前的代码要求明文长度为8个字符(5个字符的名称加上3个空格)。

解决方案

我已经遇到了这个问题。这是因为填充问题。您需要的代码是

代码链接您可以在go playground进行测试。

 包主

导入(
crypto / cipher
crypto / des
encoding / base64
fmt
字节


func main(){
originalText:=yolan
fmt.Println(originalText)

key:= [] byte {0xBC,0xBC,0xBC,0xBC,0xBC ,0xBC,0xBC,0xBC}

//将值加密到base64
cryptoText:= encrypt(key,originalText)
fmt.Println(cryptoText)


$ // b使用des
将字符串加密到base64密码func encrypt(key [] byte,text string)string {
明文:= [] byte(text)

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

iv:= []字节{0xBC,0xBC,0xBC,0xBC,0xBC,0xBC,0xBC,0xBC}

blockSize:= block.BlockSize()
origData:= PKCS5Padding(plaintext,blockSize)
lockMode:= cipher.NewCB​​CEncrypter(block,iv)
cryted:= make([] byte,len (origData))
blockMode.CryptBlocks(cryted,origData)

return base64.URLEncoding.EncodeToString(cryted)
}

func PKCS5Padding(src [] byte,blockSize int)[] byte {
padding:= blockSize - len(src)%blockSize
padtext:= bytes.Repeat([] byte {byte(padding)},padding)
return append(src,padtext ...)
}

func PKCS5UnPadding(src [] byte)[] byte {
length:= len(src)
unpadding:= int(src [length-1])$ ​​b $ b return src [:( length - unpadding)]
}


Currently trying to encrypt plaintext that is 5 characters long into a 12 character encrypted string. I want to be able to specify a unique IV (not randomly generated), a unique key, and use DES. My current code requires the plaintext to be 8 characters long (5 character name plus 3 spaces).

解决方案

I have already faced this problem. This is because of padding issue. The code you wanted is a

Code link You Can test it at go playground.

  package main

  import (
    "crypto/cipher"
    "crypto/des"
    "encoding/base64"
    "fmt"
    "bytes"
  )

  func main() {
    originalText := "yolan"
    fmt.Println(originalText)

    key := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC}

    // encrypt value to base64
    cryptoText := encrypt(key, originalText)
    fmt.Println(cryptoText)

  }

  // encrypt string to base64 crypto using des
  func encrypt(key []byte, text string) string {
    plaintext := []byte(text)

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

    iv := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC}

    blockSize := block.BlockSize()
    origData := PKCS5Padding(plaintext, blockSize)
    blockMode := cipher.NewCBCEncrypter(block, iv)
    cryted := make([]byte, len(origData))
    blockMode.CryptBlocks(cryted, origData)

    return base64.URLEncoding.EncodeToString(cryted)
  }

  func PKCS5Padding(src []byte, blockSize int) []byte {
    padding := blockSize - len(src)%blockSize
    padtext := bytes.Repeat([]byte{byte(padding)}, padding)
    return append(src, padtext...)
  }

  func PKCS5UnPadding(src []byte) []byte {
    length := len(src)
    unpadding := int(src[length-1])
    return src[:(length - unpadding)]
  }

这篇关于Golang:如何使用DES和CBC加密长度为5个字符的纯文本?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆