aws-pem-file-to-fingerprint

#!/bin/bash
#
# Given a AWS PEM key pair file, print the fingerprint.
#
# Example:
#
#     $ aws-pem-file-to-fingerprint foo.pem
#     af:6f:ff:6f:0f:ff:f9:6f:31:40:f9:4f:f4:96:71:ff:0f:25:76:f5
#
# Command: aws-pem-file-to-fingerprint
# Created: 2017-01-08
# Updated: 2017-01-08
# License: GPL
# Contact: Joel Parker Henderson (joel@joelparkerhenderson.com)
##
set -euf
openssl pkcs8 -in "$1" -inform PEM -outform DER -topk8 -nocrypt | openssl sha1 -c