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#!/bin/sh
#
#  p12certinfo -- dumps PEM certificates (not keys) from a P12 file
#
#  Copyright (c) 2012 Samuel Lidén Borell <samuel@kodafritt.se>
#  
#  Permission is hereby granted, free of charge, to any person obtaining a copy
#  of this software and associated documentation files (the "Software"), to deal
#  in the Software without restriction, including without limitation the rights
#  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#  copies of the Software, and to permit persons to whom the Software is
#  furnished to do so, subject to the following conditions:
#  
#  The above copyright notice and this permission notice shall be included in
#  all copies or substantial portions of the Software.
#  
#  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#  THE SOFTWARE.
#

printf "Enter password of P12 file: "
read PASSWORD -p ''

p12info() {
    openssl pkcs12 -in "$1" -nomacver -nokeys -password pass:$PASSWORD
}

extractfirst() {
    grep -FA 999999 -- "-----BEGIN CERTIFICATE-----" | grep -FB 999999 -- "-----BEGIN CERTIFICATE-----" | grep -FB 999999 -- "-----END CERTIFICATE-----"
}

extractlast() {
    grep -FA 999999 -- "-----BEGIN CERTIFICATE-----" | grep -FA 999999 -- "-----END CERTIFICATE-----" | grep -FA 999999 -- "-----BEGIN CERTIFICATE-----"
}

indent() {
    sed -r 's/^/    /g'
}

certinfo() {
    #openssl x509 -text
    openssl x509 -serial -md5 -fingerprint -noout -text
}


while true; do
    case "$1" in
        -extract-certs)
            p12info "$2"
            shift 2
            continue;;
        -extract-first)
            p12info "$2" | extractfirst
            shift
            continue;;
        -extract-last)
            p12info "$2" | extractlast
            shift
            continue;;
        *)
            # Show info
            echo "$1:"
            echo "END ENTITY"
            p12info "$1" | extractfirst | certinfo | indent

            echo ""
            echo "ISSUER"
            p12info "$1" | extractlast | certinfo | indent
            
            echo
            break;;
    esac
    shift
done