openssl dgst -sha1 -sign ./DTE/CAF.52/PRV.pem -out ./DTE/CAF.52/CAF.mess.sha1 ./DTE/CAF.52/CAF.mess
ver=`openssl dgst -sha1 -verify ./DTE/CAF.52/PUB.pem -signature ./DTE/CAF.52/CAF.mess.sha1 ./DTE/CAF.52/CAF.mess`
openssl enc -base64 -in ./DTE/CAF.52/CAF.mess.sha1
