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-- Copyright (c) 2014, Natacha Porté --
-- --
-- Permission to use, copy, modify, and distribute this software for any --
-- purpose with or without fee is hereby granted, provided that the above --
-- copyright notice and this permission notice appear in all copies. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES --
-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF --
-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR --
-- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES --
-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN --
-- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF --
-- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. --
------------------------------------------------------------------------------
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-- HMAC.Pinentry encapsulates communication with `pinentry` utility from --
-- GnuPG project. --
-- Depending on communication features available, the package might not be --
-- functional on all targets. A client should use Is_Available function to --
-- ensure the underlying implentation is indeed operational. --
------------------------------------------------------------------------------
package HMAC.Pinentry is
Backend_Error : exception;
function Get_Key (Command : String) return String;
-- Run the given Command and communicate with it using pinentry protocol
-- and return a secret String or raise Backend_Error.
function Is_Available return Boolean;
-- Check whether Get_Key can actually work
end HMAC.Pinentry;