How to encrypt file through open SSL (Secure,Socket,Layer)in Linux RedHat part 1

hello guys today we are going to learn how to encrypt file through open ssl method. but  before  i enplane some knowledge of  open SSL method. open ssl is a file encrypt method.  this method in several Version of file encrypting its a very strong method . in  this tutorial  we will discuss some use full and strong  version of encrypt method  and we will also learn in our linux machine that  how can we apply on our file.

(note- in this tutorial all commands use on redhat linux 5 if you have other version of linux like fedora ,Ubuntu ,kubuntu, or other .Open ssl File encryption method is work on all type of linux .you onlly need to install package according to linux Operating system.

Step 1 here we will install openssl package through Yum Server. if you want to know how to configure yum Server in linux redhat  then click on  this link and look.

[root@localhost exp]# yum install openssl -y

Here before  we will learn base64 version open ssl method. in this method we can write encrypted content and also make encrypted file so you just follow me and look with piratical

Step 2 before we will learn how to write encrypt text through  base64

[root@dhcppc16 ~]# echo "hello this is encrypt method base64 demo"|openssl enc -base64
aGVsbG8gdGhpcyBpcyBlbmNyeXB0IG1ldGhvZCBiYXNlNjQgZGVtbwo=

now if we want to decriypt  content we will just put our encrypt content mid in” “and run command

[root@dhcppc16 ~]# echo "aGVsbG8gdGhpcyBpcyBlbmNyeXB0IG1ldGhvZCBiYXNlNjQgZGVtbwo="|openssl enc -base64 -d 
hello this is encrypt method base64 demo

Step 3 we can encrypt any file through this Commands

[root@localhost exp]# openssl enc -base64 -in a.txt -out a.enc
[root@localhost exp]# ls
a.enc  a.txt
[root@localhost exp]# rm -rf a.txt
[root@localhost exp]# cat a.enc
IGhlbGxvIHRoaXMgaXMgbXkgZGVtbyBmaWxlCg==

we can decrypt file through this below Commands

[root@localhost exp]# openssl enc -base64 -d -in a.enc -out a.txt
[root@localhost exp]# ls
a.enc  a.txt
[root@localhost exp]# rm -rf a.enc
[root@localhost exp]# cat a.txt
 hello this is my file encryption base64 demo

Step 4 Encrypt and decriypt a File or message using AES-256-cvc method

[root@localhost exp]# echo "hello this is AES-256-CVC demo"|openssl enc -aes-256-cbc >a.bat
enter aes-256-cbc encryption password: 12345
Verifying - enter aes-256-cbc encryption password:12345
[root@localhost exp]# ls
a.bat
[root@localhost exp]# cat a.bat
Salted__Y,@o???a?4???tc(t[?c???$F^?$O???|??[root@localhost exp]#

now we will decriypt through below commands

[root@localhost exp]# echo "hello this is AES-256-CVC demo"|openssl enc -aes-256-cbc -d -in a.bat
enter aes-256-cbc decryption password:12345
hello this is AES-256-CVC demo

here we will learn if we have already any file we want encrypt then we will use below commands

[root@localhost exp]# openssl enc -aes-256-cbc -in a.txt -out a.bat
enter aes-256-cbc encryption password:12345
Verifying - enter aes-256-cbc encryption password:12345
[root@localhost exp]# ls
a.bat  a.txt
[root@localhost exp]# cat a.bat
Salted__?cJ??D^??0?7??6?i???+?#??7??+?z
+^W?[root@localhost exp]#
we can decrepit file through this Commands 
[root@localhost exp]# openssl enc -d -aes-256-cbc -in a.bat -out a.txt
enter aes-256-cbc decryption password:
[root@localhost exp]# ls
a.bat  a.txt
[root@localhost exp]# cat a.txt
hello this is my file demo

if you have any problem in this process so please Comments here i will solve your problem otherwise like share and follow my blog for Linux Networking and IT Solution

thank you

BY Vishnu Sharma