check SSL certificate and PGP key expiration date with shell

check-key-expiration.sh

#!/bin/bash

# check TLS/SSL certificate expiration date
# openssl x509 -text -noout -in inputfile
# https://www.sslshopper.com/certificate-decoder.html

echo -e "\n## SSL Certificates List: \n\n| File Name | Valid From | Valid To | Comment |\n| --- | --- | --- | --- |" >> README.md
for file in $(find .); do
    if test -f $file; then
        if grep -q "\-BEGIN CERTIFICATE\-" $file; then
            echo "checking: $file"
            result=$(openssl x509 -text -noout -in $file)
            validateFrom=$(echo "$result" | grep "Not Before" | sed "s/Not Before: //g")
            validateTo=$(echo "$result" | grep "Not After" | sed "s/Not After : //g")
            echo "| $file | $validateFrom | $validateTo | |" >> README.md
        fi
    fi
done


# Check PGP key expiration date
# gpg --show-keys inputFile
echo -e "\n## PGP Keys List: \n\n| File Name | Valid From | Valid To | Comment |\n| --- | --- | --- | --- |" >> README.md

for file in $(find .); do
    if test -f $file; then
        if grep -q "BEGIN PGP PUBLIC KEY BLOCK" $file; then
            echo "checking: $file"
            result=$(gpg --show-keys $file)
            validateFrom=$(echo "$result" | awk  '/pub/{print $3}')
            validateTo=$(echo "$result" | awk  '/pub/{print $5 $6}')
            echo "| $file | $validateFrom | $validateTo | |" >> README.md
        fi
    fi
done