Usage:  signver [ commands ] options
signver - verify a detached PKCS7 signature - Version 3.133
Commands:
 -A                    display all information from pkcs #7
 -V                    verify the signed object and display result
Options:
 -a                    signature file is ASCII
 -d certdir            directory containing cert database
 -i dataFileName       input file containing signed data (default stdin)
 -o outputFileName     output file name, default stdout
 -s signatureFileName  input file for signature (default stdin)
 -v                    display verbose reason for failure