Sign file and Verify signature with openssl 1.0.0e

Input : pkcs12 file (server.p12) that contains certificate and privatekey

1)  Export the certificate

openssl pkcs12 -in server.p12 -out mycert.pem

2) Extract privatekey

openssl pkcs12 -in server.p12 -nocerts -out privatekey.pem

3) Export public key

openssl x509 -inform pem -in publiccert.pem -pubkey -noout > publickey.pem

4) Sign file

openssl dgst -sha1 -sign privatekey.pem -out CA.pl.sha1 CA.pl

5) Verify  signature

openssl dgst -sha1 -verify publickey.pem -signature CA.pl.sha1 CA.pl