Bash Cookbook

How to do it...

1. We are going to encrypt and decrypt simple messages. We will use the -base64 encoding scheme. First, we will encrypt a message. Run the following command in the terminal:

$ echo "Welcome to Bash Cookbook" | openssl enc -base64

2. To decrypt the message, run following command in the terminal:

$ echo " V2VsY29tZSB0byBCYXNoIENvb2tib29rCg==" | openssl enc -base64 -d

3. Now we are going to encrypt and decrypt files. First, we will encrypt a file. Run the following command in the terminal:

$ openssl enc -aes-256-cbc -in /etc/services -out enc_services.dat

4. Now we are going to decrypt a file. Run the following command in the terminal:

$ openssl enc -aes-256-cbc -d -in enc_services.dat > services.txt