Comparison of OpenSSL signature generation/verification times

signature_bench.sh

#!/usr/bin/env zsh

set -e

tmp_dir=$(mktemp -d)
pushd $tmp_dir

openssl dsaparam -genkey -out dsa_key 3072
openssl dsa -in dsa_key -pubout -out dsa_key.pub

openssl genrsa -out rsa_key 3072
openssl rsa -in rsa_key -pubout -out rsa_key.pub

openssl ecparam -name prime256v1 -genkey -out ecdsa_key
openssl ec -in ecdsa_key -pubout -out ecdsa_key.pub

N=1000
echo "\nGenerating $N random messages for signing"
for i in {1..$N} ; do
    openssl rand -hex 32 > msg_${i}.txt
done

for algo in dsa rsa ecdsa ; do
    echo "\nGenerating ${algo:u} signatures"
    time (
        for msg in msg_*.txt ; do
            openssl dgst -sha256 -sign ${algo}_key $msg > ${msg}.${algo}.sig
        done
    )
done

for algo in dsa rsa ecdsa ; do
    echo "\nVerifying ${algo:u} signatures"
    time (
        for msg in msg_*.txt ; do
            openssl dgst -sha256 -verify ${algo}_key.pub -signature ${msg}.${algo}.sig $msg > /dev/null
        done
    )
done

# Delete messages
popd
rm -rf $tmp_dir