sns-verify.sh

October 22, 2011

#!/bin/sh

if [ $# -lt 3 ]; then
  echo "usage: sns-verify.sh CERT SIG MESS"
  exit 1
fi

CERT=$1
SIG=$2
MESS=$3

PUB=`/bin/tempfile`
SIGRAW=`/bin/tempfile`

# http://sns-public-resources.s3.amazonaws.com/SNS_Message_Signing_Release_Note_Jan_25_2011.pdf
/usr/bin/openssl x509 -in $CERT -pubkey -noout > $PUB
/usr/bin/base64 -i -d $SIG > $SIGRAW
RET=`/usr/bin/openssl dgst -sha1 -verify $PUB -signature $SIGRAW $MESS`

if [ X"$RET" = X"Verified OK" ]; then
  exit 0
fi

exit 1

Tagged with: aws bash openssl sns

Categorised as: snippet