Example: encryption and decryption of compressed files (read + OpenSSL + tar + dd)

1. Some files need to be encrypted.

2. Some folders need to be encrypted.

Analysis:

What are the considerations for file or folder encryption?

Folder auto-completion full-time suffix with backslash processing rules

Naming rules for encryption of a single file

> The script command format is./SS {unencryptfile | unencryptdir}

> First, determine whether the first parameter is a file or a folder.

1. Folder

> Check whether a folder has a backslash.

> Use the folder name as the name of the generated compressed package

2. File time

> The file Suffix in Linux is removed during encryption.

> The suffix makes sense when compression and decompression are used.

> Use the file name as the compressed package name

Example:

------- Encrypt-> Generate .tar.bz2or .tar.gz compressed file -------

$ Vim tar. Encrypt

#! /Bin/bash

Read-P "input compress cipher key:" ARGs # indicates the input compression key.

# The way I

# Tar-zcf-$1 | OpenSSL des3-salt-K $ ARGs | dd of1_1_1.tar.gz encrypted to generate .tar.gz compression format

Tar-JCF-$1 | OpenSSL des3-salt-K $ ARGs | dd of1_1_1.tar.bz2 encrypted to generate .tar.bz2 compression format

# The way II works with wayI

# Tar-zcf-$1 | OpenSSL des3-salt-K $ ARGs-out release 1.tar.gz

# Tar-JCF-$1 | OpenSSL des3-salt-K $ ARGs-out rules 1.tar.bz2

------- Decrypt-> Generate a file or folder -------

$ Vim tar. decipher

#! /Bin/bash

Read-P "input decompress cipher key:" ARGs # enter the decryption key

# The way I works with wayii

# Dd If = $1 | OpenSSL des3-D-K $ ARGs | tar-zxf-

# Dd If = $1 | OpenSSL des3-D-K $ ARGs | tar-jxf-

# The way II

# OpenSSL des3-D-K $ ARGs-salt-in $1 | Extract files in .tar.gz format from tar-zxf-release

OpenSSL des3-D-K $ ARGs-salt-in $1 | Extract files in .tar.bz2 format from tar-jxf-compression

Note:

No parameter quantity limit is added.

This article is from the "andyhdchoice" blog, please be sure to keep this source http://andyhdchoice.blog.51cto.com/1521623/1548788

Example: encryption and decryption of compressed files (read + OpenSSL + tar + dd)