1 files changed, 99 insertions, 0 deletions
diff --git a/lib/ssl/src/ssl_debug.erl b/lib/ssl/src/ssl_debug.erl
new file mode 100644
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+++ b/lib/ssl/src/ssl_debug.erl
@@ -0,0 +1,99 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2007-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+
+%%
+
+%%% Purpose : some debug utilities
+
+-module(ssl_debug).
+
+-export([unhex/1, hexd/1, hex_data/2, term_data/2, hex_data/4, term_data/4, make_binary/1]).
+
+%% external
+
+hex_data(Name, Data) ->
+    io:format("~s\n~s", [Name, hex(Data)]).
+
+term_data(Name, Term) ->
+    io:format("~s\n~p\n", [Name, Term]).
+
+hex_data(Name, Data, Mod, Line) ->
+    io:format("~w:~p ~s\n~s", [Mod, Line, Name, hex(Data)]).
+
+term_data(Name, Term, Mod, Line) ->
+    io:format("~w:~p ~s\n~p\n", [Mod, Line, Name, Term]).
+
+unhex(S) ->
+    Lines = string:tokens(S, "\n"),
+    H = [unhex(L, []) || L <- Lines],
+    list_to_binary(H).
+
+make_binary(Size) ->
+    crypto:rand_bytes(Size).
+
+%% internal
+
+is_hex_digit(C) when C >= $0, C =< $9 -> true;
+is_hex_digit(C) when C >= $A, C =< $F -> true;
+is_hex_digit(C) when C >= $a, C =< $f -> true;
+is_hex_digit(_) -> false.
+
+unhex([], Acc) ->
+    list_to_binary(lists:reverse(Acc));
+unhex([_], Acc) ->
+    unhex([], Acc);
+unhex([$  | Tl], Acc) ->
+    unhex(Tl, Acc);
+unhex([D1, D2 | Tl], Acc) ->
+    case {is_hex_digit(D1), is_hex_digit(D2)} of
+        {true, true} ->
+            unhex(Tl, [erlang:list_to_integer([D1, D2], 16) | Acc]);
+        _ ->
+            unhex([], Acc)
+    end.
+
+hexd(B) ->
+    io:format("~s\n", [hex(B)]).
+
+hex(B) -> hex(erlang:iolist_to_binary(B), []).
+
+hex_asc(B) ->
+    L = binary_to_list(B),
+    {hexify(L), asciify(L)}.
+
+hex(<<B:16/binary, Rest/binary>>, Acc) ->
+    {HS, AS} = hex_asc(B),
+    hex(Rest, ["\n", AS, "  ", HS | Acc]);
+hex(<<>>, Acc) ->
+    lists:reverse(Acc);
+hex(B, Acc) ->
+    {HS, AS} = hex_asc(B),
+    L = erlang:iolist_size(HS),
+    lists:flatten(lists:reverse(Acc, [HS, lists:duplicate(3*16 - L, $ ), "  ", AS, "\n"])).
+
+hexify(L) -> [[hex_byte(B), " "] || B <- L].
+
+hex_byte(B) when B < 16#10 -> ["0", erlang:integer_to_list(B, 16)];
+hex_byte(B) -> erlang:integer_to_list(B, 16).
+
+asciify(L) -> [ascii_byte(C) || C <- L].
+
+ascii_byte($") -> $.;
+ascii_byte(C) when C < 32; C >= 127 -> $.;
+ascii_byte(C) -> C.