目录什么是AESgo实现aes加密小案例需求实战加密代码解密代码实现passctl命令行应用代码编译成二进制后使用什么是AES关于AES更多的知识,请自行脑补,密码学中的高级加密标准(Advanced...
目录
什么是AESgo实现aes加密
小案例需求
实战
加密代码
解密代码
实现passctl命令行应用
代码
编译成二进制后使用
什么是AES
关于AES更多的知识,请自行脑补,密码学中的高级加密标准(Advanced Encryption Standard,AES),又称Rijndael加密法,是经常采用的一种区块加密标准。
go实现aes加密
在golang的标准库aes可以实现AES加密,官方标准库aes文档链接:https://pkg.go.dev/crypto/aes
小案例需求
本篇分享出在实际工作中的实际需求,需求很简单,就是需要实现一个命令行应用程序,可以对传入的明文字符串进行加密,传入密文进行解密。命令行应用叫做passctl,并带有帮助功能。实现命令行应用程序有很多强大的第三方库,因为需求过于简单,那么本篇就用标准库中os即可。
实战
加密代码
packagemain
import(
"bytes"
"crypto/aes"
"crypto/cipher"
"encoding/base64"
"fmt"
)
varEncKey=[]byte("QAZWSXEDCRFVTGBY")//16位密码串
funcpkcs7Padding(data[]byte,blockSizeint)[]byte{
padding:=blockSize-len(data)%blockSize
padText:=bytes.Repeat([]byte{byte(padding)},padding)
returnappend(data,padText...)
}
funcAesEncrypt(data[]byte,key[]byte)([]byte,error){
block,err:=aes.NewCipher(key)
iferr!=nil{
returnnil,err
}
blockSize:=block.BlockSize()
encryptBytes:=pkcs7Padding(data,blockSize)
crypted:=make([]byte,len(encryptBytes))
blockMode:=cipher.NewCBCEncrypter(block,key[:blockSize])
blockMode.CryptBlocks(crypted,encryptBytes)
returncrypted,nil
}
funcEncryptByAes(data[]byte)(string,error){
res,err:=AesEncrypt(data,EncKey)
iferr!=nil{
return"",err
}
returnbase64.StdEncoding.EncodeToString(res),nil
}
funcmain(){
plaintext:="2wsx$RFV!Qaz"//假设这是明文密码
p:=[]byte(plaintext)
newp,_:=EncryptByAes(p)//开始加密
fmt.Println(newp)
}
解密代码
基于上述加密后的密码,对其进行解密。
packagemain
www.cppcns.comimport(
"crypto/aes"
"crypto/cipher"
"encoding/base64"
"errors"
"fmt"
)
varEncKey=[]byte("QAZWSXEDCRFVTGBY")//16位密码串
funcpkcs7UnPadding(data[]byte)([]byte,error){
length:=len(data)
iflength==0{
returnnil,errors.New("Sorry,theencryptionstringiswrong.")
}
unPadding:=int(data[length-1])
returndata[:(length-unPadding)],nil
}
funcAesDecrypt(data[]byte,key[]byte)([]byte,error){
block,err:=aes.NewCipher(key)
iferr!=nil{
returnnil,err
}
blockSize:=block.BlockSize()
blockMode:=cipher.NewCBCDecrypter(block,key[:blockSize])
crypted:=make([]byte,len(data))
blockMode.CryptBlocks(crypted,data)
crypted,err=pkcs7UnPadding(crypted)
iferr!=nil{
returnnil,err
}
returncrypted,nil
}
funcDecryptByAes(datastring)([]byte,error){
dataByte,err:=base64.StdEncoding.DecodeString(data)
iferr!=nil{
returnnil,err
}
returnAesDecrypt(dataByte,EncKey)
}
funcmain(){
ciphertext:="+LxjKS8N+Kpy/HNxsSJMIw=="//密文
pwd,_:=DecryptByAes(ciphertext)//开始解密
fmt.Println(string(pwd))
}
实现passctl命令行应用
代码
packagemain
import(
"bytes"
"crypto/aes"
"crypto/cipher"
"encoding/base64"
"errors"
"fmt"
"os"
)
varEncKey=[]byte("QAZWSXEDCRFVTGBY")//16位密码串
funcpkcs7Padding(data[]byte,blockSizeint)[]byte{
padding:=blockSize-len(data)%blockSize
padText:=bytes.Repeat([]byte{byte(padding)},padding)
returnappend(data,padText...)
}
funcpkcs7UnPadding(data[]byte)([]byte,error){
length:=len(data)
iflength==0{
returnnil,errors.New("Sorry,theencryptionstringiswrong.")
}
unPadding:=int(data[length-1])
returndata[:(length-unPadding)],nil
}
funcAesEncrypt(data[]byte,key[]byte)([]byte,error){
block,err:=aes.NewCipher(key)
iferr!=nil{
returnnil,err
}
blockSize:=block.BlockSize()
encryptBytes:=pkcs7Padding(data,blockSize)
crypted:=make([]byte,len(encryptBytes))
blockMode:=cipher.NewCBCEncrypter(block,key[:blockSize])
blockMode.CryptBlocks(crypted,encryptBytes)
returncrypted,nil
}
funcAesDecrypt(data[]byte,key[]byte)([]byte,error){
block,err:=aes.NewCipher(key)
iferr!=nil{
returnnil,err
}
blockSize:=block.BlockSize()
blockMode:=cipher.NewCBCDecrypter(block,key[:blockSize])
crypted:=make([]byte,len(data))
blockMode.CryptBlocks(crypted,data)
crypted,err=pkcs7UnPadding(crypted)
iferr!=nil{
returnnil,err
}
returncrypted,nil
}
funcEncryptByAes(data[]byte)(string,error){
res,err:=AesEncrypt(data,EncKey)
iferr!=nil{
return"",err
}
returnbase64.StdEncoding.EncodeToString(res),nil
}
funcDecryptByAes(datastring)([]byte,error){
dataByte,err:=base64.StdEncoding.DecodeString(data)
iferr!=nil{
returnnil,err
}
returnAesDecrypt(dataByte,EncKey)
}
consthelp=`
Helpdescriptionofencryptionanddecryptioncommandlineapplication
-h--help[Displayhelp]
-e--encryptionPlaintextstringencryption
-d--decryptCiphertextstringdecryption
Example:
1.encryptionexample:
passctl-e"yourplaintextpassword"
2.decryptionexample:
passctl-d"Yourciphertextstring"
`
funcmain(){
args:=os.Args[1]
ifargs=="-h"||args=="--help"{
fmt.Print(help)
}elseifargs=="-e"||args=="--encryption"{
plaintext:=os.Args[2]
p:=[]byte(plaintext)
newp,_:=EncryptByAes(p)
fmt.Println(newp)
}elseifargs=="-d"||args=="--decrypt"{
ciphertext:=os.Args[2]
a,_:=DecryptByAes(ciphertext)
fmt.Println(string(a))
}else{
fmt.Println("Invalidoption")
}
}
编译成二进制后使用
#编译 [root@devhostencryptionDecryption]#gobuild-opassctlmain.go #查看帮助 [root@devhostencryptionDecryption]#./passctl-h Helpdescriptionofencryptionanddecryptioncommandlineapplication -h--help[Displayhelp] -e--encryptionPlaintextstringencryption -d--decryptCiphertextstringdecryption Example: 1.encryptionexample: passctl-e"yourplaintextpassword" 2.decryptionexample: passctl-d"Yourciphertextstring" #加密 [root@devhostencryptionDecryption]#./passctl-eabc123456 nGi3ls+2yghdv7o8Ly2Z+A== #解密 [root@devhostencryptionDecryption]#./passctl-dnGi3ls+2yghdv7o8Ly2Z+A== abc123456 [root@devhostencryptionDecryption]#
到此这篇关于Go语言实现AES加密并编写一个命令行应用程序的文章就介绍到这了,更多相关Go语言AES加密内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们!










