加密算法

# !/bin/bash# 全局变量
str=""base64_encode_string(){# 源数据   source_string=$1echo "源数据：$1"# 判断是否为空if [ 0 -eq "${#source_string}" ]; thenecho "输入为空，退出"returnfiecho "正在执行..."# 编码集Wnrm0b7QPpI1FGBYVizZXN84vTJqocOuD9aHdgSlt2jRyAKEe6kCxhsfwL5M3U+/BASE64_CODE_TABLE=(W n r m 0 b 7 Q P p I 1 F G B Y V i z Z X N 8 4 v T J q o c O u D 9 a H d g S l t 2 j R y A K E e 6 k C x h s f w L 5 M 3 U + /)# 不知道FIRST_SOURCE_BYTE_DIVIDEND=0X04SECOND_SOURCE_BYTE_DIVIDEND=0X10THIRD_SOURCE_BYTE_DIVIDEND=0X40# 标记encode_state=1#last_source_byte=""# 结果result=""# 将字符转化成ASCII码值for((i=0;i<${#source_string};++i)){#curChar='printf "%d" "${#source_string:i:1}";'curChar=`printf "%d" "'${source_string:i:1}";`echo curChar=$curCharcase $encode_state in1)index=$(( $curChar / $FIRST_SOURCE_BYTE_DIVIDEND ))# echo "INDEX IN STATE 1 IS : $index"result="$result${BASE64_CODE_TABLE[$index]}"echo "结果：" $resultencode_state=2;;2)index_high=$(( ($last_source_byte % $FIRST_SOURCE_BYTE_DIVIDEND)* 0X10 ))index_low=$(( $curChar / $SECOND_SOURCE_BYTE_DIVIDEND ))index=$(( $index_high + $index_low ))# echo "index in state 2 is: $index"result="$result${BASE64_CODE_TABLE[$index]}"echo "结果：$result"encode_state=3;;3)index_high=$(( ($last_source_byte % $SECOND_SOURCE_BYTE_DIVIDEND) * 0X04 ))index_low=$(( $curChar / $THIRD_SOURCE_BYTE_DIVIDEND ))index=$(( $curChar % $THIRD_SOURCE_BYTE_DIVIDEND ))# echo "index2 in state 3 is: $index"result="$result${BASE64_CODE_TABLE[$index]}"echo "结果：$result"# 追加最后一位index=$(( $curChar % 0x10 ))result="$result${BASE64_CODE_TABLE[$index]}"echo "追加结果：$result"encode_state=1;;esaclast_source_byte=$curChar
}# process padingcase $encode_state in2)echo $FIRST_BYTE_DIVIDENDindex=$(( ($last_source_byte % $FIRST_SOURCE_BYTE_DIVIDEND) * 0X10 ))#echo "index in pading state 2 is: $index"result="$result${BASE64_CODE_TABLE[$index]}==";;3)index=$(( ($last_source_byte % $SECOND_SOURCE_BYTE_DIVIDEND) * 0X04 ))#echo "index in pading state 3 is: $index"result="$result${BASE64_CODE_TABLE[$index]}=";;esacecho "添加后缀：$result"str=$result}# main函数echo "开始加密..."read m
echo $m
read n
# 第二种
echo "-------------------"cat $1 |while read line
do
from=$line
base64_encode_string $from
#str=$?
# echo "输出：" $str
# 写入文件
echo "$str" >> to
done# 加密# 写入文件
#base64_encode_string $1echo "加密结束..."

解密算法

# !/bin/bash# 全局变量
str=""
_str=""
# 编码集Wnrm0b7QPpI1FGBYVizZXN84vTJqocOuD9aHdgSlt2jRyAKEe6kCxhsfwL5M3U+/
BASE64_CODE_TABLE=(W n r m 0 b 7 Q P p I 1 F G B Y V i z Z X N 8 4 v T J q o c O u D 9 a H d g S l t 2 j R y A K E e 6 k C x h s f w L 5 M 3 U + /)# 16#---->ascii
fun(){
a=$1
b=`printf "%d" $a`
#echo $b |awk '{printf("%c", $1)}'
_str=`echo $b |awk '{printf("%c", $1)}'`
}# 四个字符转化为正确的三个字符
get(){# getget=$1echo "数据源" $1# toto=""# sizesize=4if [[ $2 = 1 ]]; thensize = 3elif [[ $2 = 2 ]]; thensize =2fifor((i=0;i<size;++i))do# echo "循环I：$i ${get:i:1}"for((j=0;j<64;j++))do# echo "当前：$j ${BASE64_CODE_TABLE[$j]}"if [[ ${get:i:1} = ${BASE64_CODE_TABLE[$j]} ]]; thenif [[ i < size-1 ]];thento=$(( ($to + $j)* 0x10))# 此时为十进制echo "匹配：$i $j $to ${get:i:1}"elseto=$(($to + $j))fibreakfidonedoneget=""# 十进制转化为十六进制echo "十六进制结果" $toif [[ size = 1 ]]; thento=$to/0x04tmp=$to / 0x100tmp="\x${tmp}"tmp=`printf "$tmp"`to=$to >> 8tmp="\x${to}"tmp=`printf "$tmp"`get=$get $tmpelif [[ size = 2 ]]; thento=$to/0x10tmp="\x${to}"tmp=`printf "$tmp"`get=$get $tmpelseprintf "%d" $(( ($to / 65536) ))tmp=$(( ($to / 65536) ))fun $tmpecho "_str:" $_strto=$(( ($to % 65536) ))tmp=$(( ($to / 256) ))# tmp="\x${tmp}"echo `printf "$tmp"`tmp=`printf $tmp`get="$get" "$tmp"to=$to >> 8get=$get `echo -e '\x${to % 0x100}'`to=$to >> 8get=$get `echo -e '\x${to % 0x100}'`fiecho "get----------->"echo $get
}base64_encode_string(){# 源数据   source_string=$1last=0last_to=0# 结果result=""# 判断是否为空if [ 0 -eq "${#source_string}" ]; thenecho "输入为空，退出"returnfi# 结尾标记end=0echo "结尾： ${source_string:${#source_string}-3}"if [ ${source_string:${#source_string}-2} = "==" ]; thenend=2elif [ ${source_string:${#source_string}-1} = "=" ]; thenend=1elseend=0fi# 判断字符串长度len=${#source_string}if [[ 4 = len ]]; thenecho "字符串长度小于4"elseecho "字符串长度大于4"m=${#source_string}-4for((i=0;i<m;))doget ${source_string:i:4} 0result=$result $?i = $i + 4donefiecho "对结尾进行处理..."last=${source_string:${#source_string}-4:4}echo $lastcase $end in0);;1);;2)get $last 2result=$result $?;;esac  # 编码集Wnrm0b7QPpI1FGBYVizZXN84vTJqocOuD9aHdgSlt2jRyAKEe6kCxhsfwL5M3U+/# BASE64_CODE_TABLE=(W n r m 0 b 7 Q P p I 1 F G B Y V i z Z X N 8 4 v T J q o c O u D 9 a H d g S l t 2 j R y A K E e 6 k C x h s f w L 5 M 3 U + /)# 第一个字符取前六位，所以是对0100取整去掉最后两位，第二个是前一个字符的后两位和这个字符的FIRST_SOURCE_BYTE_DIVIDEND=0X04SECOND_SOURCE_BYTE_DIVIDEND=0X10THIRD_SOURCE_BYTE_DIVIDEND=0X40# 标记encode_state=1#last_source_byte=""# 结果result=""# 将字符转化成ASCII码值for((i=0;i<${#source_string};++i)){#curChar='printf "%d" "${#source_string:i:1}";'curChar=`printf "%d" "'${source_string:i:1}";`echo curChar=$curCharcase $encode_state in1)index=$(( $curChar / $FIRST_SOURCE_BYTE_DIVIDEND ))echo "INDEX IN STATE 1 IS : $index"result="$result${BASE64_CODE_TABLE[$index]}"encode_state=2;;2)index_high=$(( ($last_source_byte % $FIRST_SOURCE_BYTE_DIVIDEND)* 0X10 ))index_low=$(( $curChar / $SECOND_SOURCE_BYTE_DIVIDEND ))index=$(( $index_high + $index_low ))echo "index in state 2 is: $index"result="$result${BASE64_CODE_TABLE[$index]}"encode_state=3;;3)index_high=$(( ($last_source_byte % $SECOND_SOURCE_BYTE_DIVIDEND) * 0X04 ))index_low=$(( $curChar / $THIRD_SOURCE_BYTE_DIVIDEND ))index=$(( $curChar % $THIRD_SOURCE_BYTE_DIVIDEND ))echo "index2 in state 3 is: $index"result="$result${BASE64_CODE_TABLE[$index]}"encode_state=1;;esaclast_source_byte=$curChar
}# process padingcase $encode_state in2)echo $FIRST_BYTE_DIVIDENDindex=$(( ($last_source_byte % $FIRST_SOURCE_BYTE_DIVIDEND) * 0X10 ))#echo "index in pading state 2 is: $index"result="$result${BASE64_CODE_TABLE[$index]}==";;3)index=$(( ($last_source_byte % $SECOND_SOURCE_BYTE_DIVIDEND) * 0X04 ))#echo "index in pading state 3 is: $index"result="$result${BASE64_CODE_TABLE[$index]}=";;esacstr=$result}# main函数 $1输入文件 $2输出文件echo "开始解密..."# 第二种
echo "-------------------"get TSkr 0read mcat $1 |while read linedo
from=$line
echo "输入参数：$from"
base64_encode_string $from
# 写入文件
echo "$str" >> $2doneecho "解密结束..."

BaseTo有点问题，十六进制取高两位会报错，Base暂时没问题，应该