PAL.C.T MINI SHELL
require 'getopts'
require 'openssl'
include OpenSSL
getopts nil, "c:", "k:", "C:"
cert_file = $OPT_c
key_file = $OPT_k
ca_path = $OPT_C
data = $stdin.read
cert = X509::Certificate.new(File::read(cert_file))
key = PKey::RSA.new(File::read(key_file))
p7enc = PKCS7::read_smime(data)
data = p7enc.decrypt(key, cert)
store = X509::Store.new
store.add_path(ca_path)
p7sig = PKCS7::read_smime(data)
if p7sig.verify([], store)
puts p7sig.data
end
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