shell脚本实现Base64加解密

暂时不支持中文字符

脚本:

#!/bin/bash # ##################################################################### # #Author: LiangDong #Email: [e-mail] #Date: 2021-04-23 #FileName： base64.sh #URL: https://github.com/ledrsnet #Description： base64加解码，暂不支持中文 #Copyright (C): 2021 All rights reserved # ##################################################################### #初始化base64编码表和索引表(解码使用) baseCode=(`echo {A..Z} {a..z} {0..9} + /`) declare -A baseIndexCode for i in ${!baseCode[@]};do baseIndexCode[${baseCode[$i]}]=$i done #错误码 ERR_NULLPARM=2 #base64编码 baseEncode(){ for((i=0;i<${#binaryStr};i+=24));do buffers=${binaryStr:$i:24} [ ${#buffers} -lt 24 ] && eqFlag=true buffers+=`echo 000000000000000000000000|head -c $[24-${#buffers}]` for((j=0;j<${#buffers};j+=6));do tempBin=${buffers:$j:6} #echo $tempBin if [ $eqFlag = true ] && [ `echo "ibase=2;$tempBin"|bc` -eq 0 ];then dataStr+="=" else dataStr+=${baseCode[`echo "ibase=2;$tempBin"|bc`]} fi done done } #base64解码 baseDecode(){ for((i=0;i<${#binaryStr};i+=8));do buffers=${binaryStr:$i:8} [ ${#buffers} -lt 8 ] && break; dataStr+=`echo "ibase=2;$buffers"|bc|awk '{printf("%c"),$buffers}'` done } #临时变量 binaryStr="" dataStr="" eqFlag=false [ $# -lt 2 ] && { echo "Usage: `basename $0` str encode|decode ";exit $ERR_NULLPARM; } #展开二进制位 for((i=0;i<${#1};i++));do if [ "$2" = "encode" ];then binaryStr+=$(echo "obase=2;`printf "%d" "'${1:$i:1}"`"|bc|xargs printf "%08d") elif [ "$2" = "decode" ];then [ ${1:$i:1} = "=" ] && continue binaryStr+=$(echo "obase=2;${baseIndexCode[${1:$i:1}]}"|bc|xargs printf "%06d") #echo ${baseIndexCode[${1:$i:1}]} #echo $binaryStr fi done #echo $binaryStr #echo ${#binaryStr} case "$2" in "encode") baseEncode ;; "decode") baseDecode ;; *) ;; esac echo $dataStr 

效果：

[root@maple-c8 ~]# ./base64.sh hahanihaoa encode aGFoYW5paGFvYQ== [root@maple-c8 ~]# ./base64.sh aGFoYW5paGFvYQ== decode hahanihaoa