bash-scripts/create-pki-keys.sh at main · i-stackz/bash-scripts · GitHub

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#!/usr/bin/env bash

# Description: this is a script to create private and public encryption keys.

# function genPrivKey
genPrivKey()
{
	read -p "Provide file name for private key: (should end in .pem) " KEYNAME;
	echo ""
	read -p "Provide the keylength: (512-2048) " KEYLENGTH;
	echo ""

	if [[ "${KEYNAME}" ]]
	then
		openssl genrsa -out "$KEYNAME" "$KEYLENGTH"
	else
		echo "Error generating private key" 2>&1;
		exit 1;
	fi
}

# function genPubKey
genPubKey()
{
	# prompt user input
	read -p "Provided the private key: " KEYNAME0;
	echo ""
	read -p "Provide file name for the public key: (should end in .pem) " KEYNAME1;
	echo ""

	if [[ "${KEYNAME0}" && "${KEYNAME1}" ]]
	then
		openssl rsa -in "${KEYNAME0}" -out "${KEYNAME1}" -outform PEM -pubout
	else
		echo "Error extracting public key from private key" 2>&1
		exit 1
	fi

}

# prompt for user input
read -p "Do you want to create a private key? (y/n): " ANSWER

# if statement to check value of the ANSWER variable
if [[ "${ANSWER}" = 'y' ]]
then
	# call function
	genPrivKey;
elif [[ "${ANSWER}" = 'n' ]]
then
	# exit script
	exit 0;
else
	# display message
	echo "please enter either y or n";
fi

# prompt user input
read -p "Do you want to generate a public key from a private key? (y/n)?" ANSWER1;

# if statement to check for variable ANSWER1
if [[ "${ANSWER1}" = 'y' ]]
then
	# call function
	genPubkey;
elif [[ "${ANSWER1}" = 'n' ]]
then
	# exit script
	exit 0;
else
	# display mesage
	echo "Please enter either y or n";
fi

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