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authorMagnus Ahltorp <map@kth.se>2015-03-26 23:59:30 +0100
committerMagnus Ahltorp <map@kth.se>2015-03-27 00:00:14 +0100
commitdb1c5cf0eeba9b47a3f89bebc1abd9985ee9fef7 (patch)
tree13bb97720c65e0ff0c0a518c480410f94f5a40e6 /src/catlfish.erl
parentf38b28bfe90ac9c35c8b2edcf296720e189f7083 (diff)
Provide function for calculating entryhash from entryentryhash-merge
Diffstat (limited to 'src/catlfish.erl')
-rw-r--r--src/catlfish.erl25
1 files changed, 25 insertions, 0 deletions
diff --git a/src/catlfish.erl b/src/catlfish.erl
index 2e5ffd4..ed75495 100644
--- a/src/catlfish.erl
+++ b/src/catlfish.erl
@@ -5,6 +5,7 @@
-export([add_chain/3, entries/2, entry_and_proof/2]).
-export([known_roots/0, update_known_roots/0]).
-export([init_cache_table/0]).
+-export([entryhash_from_entry/1]).
-include_lib("eunit/include/eunit.hrl").
-define(PROTOCOL_VERSION, 0).
@@ -243,6 +244,30 @@ init_cache_table() ->
end,
ets:new(?CACHE_TABLE, [set, public, named_table]).
+deserialise_extra_data(ExtraData) ->
+ case decode_tls_vector(ExtraData, 3) of
+ {E, <<>>} ->
+ [E];
+ {E, Rest} ->
+ [E | deserialise_extra_data(Rest)]
+ end.
+
+entryhash_from_entry(Entry) ->
+ {MTLText, ExtraDataPacked} = unpack_entry(Entry),
+ {ExtraData, <<>>} = decode_tls_vector(ExtraDataPacked, 3),
+ MTL = deserialise_mtl(MTLText),
+ TimestampedEntry = MTL#mtl.entry,
+ Chain = deserialise_extra_data(ExtraData),
+ Data =
+ case TimestampedEntry#timestamped_entry.entry_type of
+ x509_entry ->
+ SignedEntry = TimestampedEntry#timestamped_entry.signed_entry,
+ [SignedEntry#signed_x509_entry.asn1_cert | Chain];
+ precert_entry ->
+ Chain
+ end,
+ crypto:hash(sha256, Data).
+
%% Private functions.
-spec unpack_entry(binary()) -> {binary(), binary()}.
unpack_entry(Entry) ->