S/MIME Signed Message

Create an S/MIME signed (PKCS7) message.

Download Chilkat Ruby Library

require 'chilkat'

mime = Chilkat::CkMime.new()

success = mime.UnlockComponent("Anything for 30-day trial.")
if (success == false)
    print mime.lastErrorText() + "\n"
    exit
end

mime.AddHeaderField("Subject","This is a test")
mime.AddHeaderField("Abc","123")

mime.SetBodyFromPlainText("This is the body")

cert = Chilkat::CkCert.new()
#  Load a certificate that has already been installed (from a .pfx)
#  on the computer:
success = cert.LoadByEmailAddress("thawte@chilkatsoft.com")
if (success == false)
    print cert.lastErrorText() + "\n"
    exit
end

#  Convert to a signed message.
success = mime.ConvertToSigned(cert)
if (success == false)
    print mime.lastErrorText() + "\n"
    exit
end

#  Display the signed MIME:
print mime.getMime() + "\n";

print "----" + "\n";

#  Unwrap to restore the original MIME.
success = mime.UnwrapSecurity()
if (success == false)
    print mime.lastErrorText() + "\n"
    exit
end

#  Display the restored (unsigned) MIME:
print mime.getMime() + "\n";