sch 助shell脚本加密 02
sch 助shell脚本加密 02
一、 简介
SHC(shell script compiler),即shell脚本编译器。通过SHC编译过的脚本对普通用户而言是不可读的,因此如果你想让你的代码实现加密功能,让其有效的屏蔽一些敏感信息,这个时候可以考虑使用SHC;它通常情况下是不太容易被破解的,但是还是有些人可以通过反编译SHC的方法来实现破解加密过的脚本。
二、 实验测试开始
2.1 下载并编译SHC
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[root@woo ~]# wget http://www.datsi.fi.upm.es/~frosal/sources/shc-3.8.3.tgz
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[root@woo ~]# ll shc-3.8.3.tgz
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-rw-r--r-- 1 root root 19874 Dec 31 20:40 shc-3.8.3.tgz
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[root@woo ~]# tar -zxvf shc-3.8.3.tgz
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shc-3.8.3/CHANGES
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shc-3.8.3/Copying
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shc-3.8.3/Makefile
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shc-3.8.3/match
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shc-3.8.3/pru.sh
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shc-3.8.3/shc.1
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shc-3.8.3/shc.c
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shc-3.8.3/shc.html
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shc-3.8.3/shc.README
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shc-3.8.3/test.bash
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shc-3.8.3/test.csh
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[root@woo ~]# cd shc-3.8.3
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[root@woo shc-3.8.3]# make && make install
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*** ?Do you want to probe shc with a test script?
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*** Please try... make test
- [root@woo shc-3.8.3]#
2.2 编译完成之后,我们切换到oracle用户下编辑一个脚本
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[root@woo ~]# su - oracle
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[oracle@woo ~]$ vi sqlscript.sql
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#!/bin/sh
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sqlplus -S system/oracle << EOF
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set pagesize 0 linesize 80 feedback off
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select ‘The database ‘ || instance_name ||
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‘ has been running since ‘||
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to_char(startup_time, ‘HH24:MI MM/DD/YYYY‘)
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from v\$instance;
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select ‘There are ‘ || count(status) ||
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‘ data files with a status of ‘ || status
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from dba_data_files
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group by status
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order by status;
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exit;
- EOF
2.3 执行加密前的脚本
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[oracle@woo ~]$ ./sqlscript.sql
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The database woo has been running since 18:17 12/23/2014
- There are 4 data files with a status of AVAILABLE
2.4 对脚本进行加密操作,会在原来的基础上多出两个文件
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[root@woo shc-3.8.3]# shc -r -f /home/oracle/sqlscript.sql
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[oracle@woo ~]$ ll sqlscript*
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-rwxr-xr-x 1 oracle oinstall 365 Dec 31 18:55 sqlscript.sql --运行文件
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-rwx--x--x 1 root root 12048 Dec 31 22:00 sqlscript.sql.x –加密后的二进制文件
- -rw-r--r-- 1 root root 11416 Dec 31 22:00 sqlscript.sql.x.c --x源文件(c语言)
2.5 执行加密后的文件,输出结果和加密前是一样的
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[oracle@woo ~]$ ./sqlscript.sql.x
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The database woo has been running since 18:17 12/23/2014
- There are 4 data files with a status of AVAILABLE
2.6 SHC可选参数
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[root@woo shc-3.8.3]# ./shc -v
shc parse(-f): No source file specified
shc Usage: shc [-e date] [-m addr] [-i iopt] [-x cmnd] [-l lopt] [-rvDTCAh] -f script
[root@woo shc-3.8.3]#
[root@woo shc-3.8.3]# ./shc --help
./shc: invalid option -- ‘-‘
shc parse: Unknown option
shc Version 3.8.3, Generic Script Compiler
shc Copyright (c) 1994-2005 Francisco Rosales <[email protected]>
shc Usage: shc [-e date] [-m addr] [-i iopt] [-x cmnd] [-l lopt] [-rvDTCAh] -f script
#设置过期时间
-e %s Expiration date in dd/mm/yyyy format [none]
#过期信息提示
-m %s Message to display upon expiration ["Please contact your provider"]
#加密脚本名称
-f %s File name of the script to compile
-i %s Inline option for the shell interpreter i.e: -e
-x %s eXec command, as a printf format i.e: exec(‘%s‘,@ARGV);
-l %s Last shell option i.e: --
#宽松的安全性,可以想通操作系统的不同机器中运行
-r Relax security. Make a redistributable binary
-v Verbose compilation
-D Switch ON debug exec calls [OFF]
-T Allow binary to be traceable [no]
#显示许可证并退出
-C Display license and exit
-A Display abstract and exit
#显示帮助和退出
-h Display help and exit
Environment variables used:
Name Default Usage
CC cc C compiler command
CFLAGS <none> C compiler flags
Please consult the shc(1) man page.
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