DuckCorp » CyborgHood

require 'gpgme' # >= 1.0.2 needed for :always_trust sign option

def crypt(fingerprint)

# build a fake mail to get the generated content to be crypted

# TODO: this is buggy yet

if @mail.multipart?

parts = @mail.parts

else

# transform to multipart

single_part = TMail::Mail.new

single_part.content_type = @mail.content_type

single_part.body = @mail.body

single_part.transfer_encoding = @mail.transfer_encoding

parts = [single_part]

end

fake_mail = TMail::Mail.new

fake_mail.set_content_type("multipart", "mixed", {'boundary' => TMail.new_boundary})

parts.each {|p| fake_mail.parts << p }

clear_data = fake_mail.to_s

# remove fake headers to get only generated parts

clear_data.sub!(/^.*\n\n/, "")

# retrieve key and encrypt

gpg = GPGME::Ctx.new

key = gpg.get_key(fingerprint)

p clear_data

encrypted_data = GPGME.encrypt([key], clear_data, {:armor => true, :always_trust => true})

# build properly encrypted mail

p_pgp = TMail::Mail.new

p_pgp.set_content_type("application", "pgp-encrypted")

p_pgp.body = "Version: 1"

p_encrypted = TMail::Mail.new

p_encrypted.set_content_type("application", "octet-stream")

p_encrypted.body = encrypted_data

@mail.set_content_type("multipart", "encrypted", {'boundary' => TMail.new_boundary})

@mail.parts << p_pgp

@mail.parts << p_encrypted

end