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|
%% -*- mode: erlang; indent-tabs-mode: nil; -*-
-module(author).
-define(verbose(Fmt, Args), case verbose() of true ->
io:fwrite(Fmt, Args);
false ->
ok
end).
-export([main/1]).
-import(proplists, [get_value/2, get_value/3]).
main([]) ->
help(),
halt(1);
main(Args) ->
Opts = opts(Args),
check_verbose(Opts),
case lists:keyfind(command, 1, Opts) of
{_, Cmd} ->
?verbose("Cmd = ~p; Options = ~p~n",
[Cmd, lists:keydelete(command, 1, Opts)]),
cmd(Cmd, Opts);
false ->
fail("No command given~n", [])
end.
opts(["-v" , "true" |T]) -> [{v, true}|opts(T)];
opts(["-v" , "false" |T]) -> [{v, false}|opts(T)];
opts(["-v" |T]) -> [{v, true}|opts(T)];
opts(["-pub" , PubKey |T]) -> [{pub, PubKey}|opts(T)];
opts(["-root", RootKey |T]) -> [{root, RootKey}|opts(T)];
opts(["-sig", SigFile |T]) -> [{sig, SigFile}|opts(T)];
opts(["-o" , OutF |T]) -> [{out, OutF}|opts(T)];
opts(["-c" , Cert |T]) -> [{cert, Cert}|opts(T)];
opts(["-b" , Bits |T]) -> [{b, l2i(Bits)}|opts(T)];
opts(["-fmt" , Fmt |T]) -> [{fmt, Fmt}|opts(T)];
opts([Cmd]) ->
[{command, Cmd}];
opts([]) ->
[].
check_verbose(Opts) ->
V = get_value(v, Opts, false),
put({?MODULE, verbose}, V),
V.
verbose() ->
get({?MODULE, verbose}).
cmd("make_auth", Opts) ->
case {get_value(root, Opts), get_value(pub, Opts), get_value(fmt, Opts)} of
{undefined, _, "jwt"} ->
fail("Cannot create JWT without root key~n", []);
{_Root, undefined, "jwt"} ->
fail("Cannot create JWT without pub key~n", []);
{Root, Pub, Fmt} ->
{RPriv, _} = get_key_pair(Root),
PubKey = get_pub_key(Pub),
make_auth(RPriv, PubKey, Fmt, Opts)
end;
cmd("make_root", Opts) ->
[Out] = mandatory([out], Opts),
Bits = bits(Opts),
make_root(Out, Bits, Opts);
cmd("make_dev", Opts) ->
[Root, Out] = mandatory([root, out], Opts),
Bits = bits(Opts),
make_dev(Root, Out, Bits, Opts);
cmd("read_sig", Opts) ->
[Root, Sig] = mandatory([root, sig], Opts),
{_, Pub} = get_key_pair(Root),
case file:read_file(Sig) of
{ok, JWT} ->
case authorize_sig:decode_jwt(JWT, Pub) of
invalid ->
fail("Cannot validate ~s~n", [Sig]);
{Header, Payload} ->
io:fwrite("Header: ~s~n"
"Payload: ~s~n",
[exo_json:encode(Header),
exo_json:encode(Payload)])
end;
{error, E} ->
fail("Cannot read ~s (~w)~n", [Sig, E])
end.
make_root_msg(X) ->
{"~s_priv.pem - private root key~n"
"~s_pub.pem - public root key~n"
"~n"
"Use ./author -root ~s_priv.pem [-b <bits>] -o <device_key_file>"
" make_dev~n"
"to create a device key pair signed by the generated private root key.~n"
"~n"
"Use ./rvi_create_certificate.py ... --root_key=~s_priv.pem ...~n"
"to sign a created certificate with the generated private root key.~n",
[X, X, X, X]}.
get_key_pair(Root) ->
case authorize_keys:get_key_pair_from_pem(openssl, Root) of
{undefined, undefined} ->
fail("Cannot read root key (~p)~n", [Root]);
{_RPriv, _RPub} = Pair ->
Pair
end.
get_pub_key(Pub) ->
case authorize_keys:get_pub_key(Pub) of
undefined ->
fail("Cannot read pub key (~p)~n", [Pub]);
PubKey ->
PubKey
end.
mandatory(Keys, Opts) ->
lists:map(
fun(K) ->
case lists:keyfind(K, 1, Opts) of
false ->
fail("Mandatory option: -~w~n", [K]);
{_, V} ->
V
end
end, Keys).
bits(Opts) ->
get_value(b, Opts, 2048).
l2i(Str) ->
try list_to_integer(Str)
catch
error:_ ->
fail("Invalid number argument, ~s~n", [Str])
end.
i2l(I) ->
integer_to_list(I).
make_auth(RPriv, Pub, Fmt, Opts) ->
case Fmt of
"json" ->
JSON = authorize_sig:ensure_json(
authorize_keys:public_key_to_json(Pub)),
out(JSON, Opts);
"jwt" ->
JWT = authorize_keys:signed_public_key(Pub, RPriv),
out(JWT, Opts)
end.
make_root(Out, Bits, _Opts) ->
make_key_pair(Out, Bits),
{Fmt, Args} = make_root_msg(Out),
io:fwrite(Fmt, Args).
make_dev(Root, Out, Bits, Opts) ->
make_key_pair(Out, Bits),
{RPriv, _} = get_key_pair(Root),
Pub = get_pub_key(pub_f(Out)),
make_auth(RPriv, Pub, "jwt", [{out, Out ++ "_pub_sign.jwt"}|Opts]).
make_key_pair(Out, Bits) ->
os:cmd(["openssl genrsa -out ", priv_f(Out), " ", i2l(Bits)]),
os:cmd(["openssl rsa -pubout -in ", priv_f(Out), " -out ", pub_f(Out)]).
priv_f(Out) -> Out ++ "_priv.pem".
pub_f (Out) -> Out ++ "_pub.pem".
out(Str, Opts) ->
case get_value(out, Opts, tty) of
tty ->
io:fwrite("~s", [Str]);
OutF when is_list(OutF) ->
case file:open(OutF, [write]) of
{ok, Fd} ->
try io:fwrite(Fd, "~s", [Str])
after
file:close(Fd)
end;
Error ->
fail("Cannot write output (~p): ~p~n", [OutF, Error])
end
end.
help() ->
io:fwrite(
"Usage: " ++ escript:script_name() ++ "[Options] Cmd~n"
"Options:~n"
" -pem PemFile : Name of OpenSSL (2048 bit RSA) pem key file~n"
" -c CertFile : Name of JSON-formatted RVI Certificate~n"
" -fmt Format : Output format (json|jwt)~n"
" -o OutFile : Name of output (tty output, if not specified)~n"
"Command:~n"
" make_auth : Create an authorization JWT~n"
" Options: -root <RootKeyFile> -pub <PubKey> [-o <Outfile>]~n"
" make_root : Create a provisioning key pair~n"
" Options: [-b <Bits>] -o <Outfile>~n"
" read_sig : Validate and read a JWT~n"
" Options: -sig <SignatureFile> -root <RootKey>~n", []).
fail(Fmt, Args) ->
io:fwrite(Fmt, Args),
help(),
erlang:halt(1).
|
