適当な大きさのファイル file1, ..., file5 を5個用意 genrsa -des3 -rand file1:file2:file3:file4:file5 1024 > httpsd.key rsa < httpsd.key > httpsd.key.out mv httpsd.key httpsd.key.bak mv httpsd.key.out httpsd.key req -new -x509 -days 365 -key httpsd.key > httpsd.pem chmod 0400 httpsd.key httpsd.pem httpsd.key.bak