From eca189ce80ec353035902dc0c361c748e042371a Mon Sep 17 00:00:00 2001
From: Magnus Ahltorp <map@kth.se>
Date: Sat, 27 Sep 2014 20:34:18 +0200
Subject: Fix api problems

---
 src/catlfish.erl | 38 +++++++++++++++++++++++++-------------
 1 file changed, 25 insertions(+), 13 deletions(-)

(limited to 'src/catlfish.erl')

diff --git a/src/catlfish.erl b/src/catlfish.erl
index 2f95cfb..bd3c106 100644
--- a/src/catlfish.erl
+++ b/src/catlfish.erl
@@ -58,6 +58,15 @@ serialise_signature_type(certificate_timestamp) ->
 serialise_signature_type(tree_hash) ->
     <<1:8>>.
 
+build_mtl(Timestamp, LeafCert) ->
+    TSE = #timestamped_entry{timestamp = Timestamp,
+                             entry_type = x509_entry,
+                             signed_entry = LeafCert},
+    MTL = #mtl{leaf_version = v1,
+               leaf_type = timestamped_entry,
+               entry = TSE},
+    serialise(MTL).
+
 -spec add_chain(binary(), [binary()]) -> nonempty_string().
 add_chain(LeafCert, CertChain) ->
     EntryHash = crypto:hash(sha256, LeafCert),
@@ -117,8 +126,9 @@ entry_and_proof(Index, TreeSize) ->
       jiffy:encode(
         case plop:inclusion_and_entry(Index, TreeSize) of
             {ok, {Entry, Path}} ->
-                {LeafCertVector, CertChainVector} = unpack_entry(Entry),
-                {[{leaf_input, base64:encode(LeafCertVector)},
+                {Timestamp, LeafCertVector, CertChainVector} = unpack_entry(Entry),
+                MTL = build_mtl(Timestamp, LeafCertVector),
+                {[{leaf_input, base64:encode(MTL)},
                   {extra_data, base64:encode(CertChainVector)},
                   {audit_path, [base64:encode(X) || X <- Path]}]};
             {notfound, Msg} ->
@@ -128,25 +138,27 @@ entry_and_proof(Index, TreeSize) ->
 
 %% Private functions.
 unpack_entry(Entry) ->
-    %% FIXME: Do this with some beatiful binary matching.
-    LeafCertVectorLen = binary:decode_unsigned(binary_part(Entry, 0, 3)),
-    LeafCertVector = binary_part(Entry, 3, LeafCertVectorLen),
-    CertChainVectorPos = 3 + LeafCertVectorLen,
-    CertChainVector = binary_part(
-                        Entry, CertChainVectorPos,
-                        byte_size(Entry) - CertChainVectorPos),
-    {LeafCertVector, CertChainVector}.
+    <<Timestamp:64, LogEntry/binary>> = Entry,
+    {LeafCertVector, CertChainVector} = decode_tls_vector(LogEntry, 3),
+    {Timestamp, LeafCertVector, CertChainVector}.
 
 -spec x_entries([{non_neg_integer(), binary(), binary()}]) -> list().
 x_entries([]) ->
     [];
 x_entries([H|T]) ->
-    {_Index, _Hash, Entry} = H,
-    {LeafCertVector, CertChainVector} = unpack_entry(Entry),
-    [{[{leaf_input, LeafCertVector}, {extra_data, CertChainVector}]} |
+    [_Index, _Hash, Entry] = H,
+    {Timestamp, LeafCertVector, CertChainVector} = unpack_entry(Entry),
+    MTL = build_mtl(Timestamp, LeafCertVector),
+    [{[{leaf_input, base64:encode(MTL)}, {extra_data, base64:encode(CertChainVector)}]} |
      x_entries(T)].
 
 -spec encode_tls_vector(binary(), non_neg_integer()) -> binary().
 encode_tls_vector(Binary, LengthLen) ->
     Length = byte_size(Binary),
     <<Length:LengthLen/integer-unit:8, Binary/binary>>.
+
+-spec decode_tls_vector(binary(), non_neg_integer()) -> {binary(), binary()}.
+decode_tls_vector(Binary, LengthLen) ->
+    <<Length:LengthLen/integer-unit:8, Rest/binary>> = Binary,
+    <<ExtractedBinary:Length/binary-unit:8, Rest2/binary>> = Rest,
+    {ExtractedBinary, Rest2}.
-- 
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