Encrypt a string within a shell script

encryptStrings.sh

################
#              #
#              #
#  ENCRYPTING  #
#  SHELL       #
#  STRINGS     #
#              #
#              #
################################################################################
#------------------------------------------------------------------------------#
# 
# ENCRYPT A STRING WITHIN A SHELL SCRIPT:
#
# This method enables you to include encrypted elements within a shell script
# Elements are entirely secured and public exposure of your script will not 
# compromise the integrity of that encrypted string in any way. 
#
# USE CASES:
# 1) Securing the contents and operations of a script on a shared system
# 2) Securing API authorization credentials on public repository files
#
# ATTRIBUTION: h8rt3rmin8r
# EMAIL: 161803398@email.tg
# PGP KEY: h8rt3rmin8r.com
#
#------------------------------------------------------------------------------#

# GENERATE A PUBLIC & PRIVATE KEY PAIR WITH OPENSSL
openssl genrsa -out rsa_key.pri 2048; openssl rsa -in rsa_key.pri -out rsa_key.pub -outform PEM -pubout

# ENCRYPT THE DESIRED PORTIONS OF YOUR SHELL SCRIPT USING THE PUBLIC KEY
# This example encrypts the string, "My million-dollar bitcoin master key":
$ echo "My million-dollar bitcoin master key" | openssl rsautl -encrypt -inkey rsa_key.pub -pubin -out secret.dat

# UNENCRYPT YOUR STRING USING YOUR PRIVATE KEY
string=`openssl rsautl -decrypt -inkey rsa_key.pri -in secret.dat `; echo $string
# The output of this command will be, "My million-dollar bitcoin master key"

#------------------------------------------------------------------------------#

# NOTE: If you are performing this operation on a shared computer, take care
# to avoid storing the secret key in a location where other system users are
# able to access.

#------------------------------------------------------------------------------#
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