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authorAdam Kocoloski <kocolosk@apache.org>2010-08-31 04:21:47 +0000
committerAdam Kocoloski <kocolosk@apache.org>2010-08-31 04:21:47 +0000
commitcce81d89f7630f7d9b95757419d4ab91faf8217e (patch)
tree55d4f9c74a7e79dccaac54f13f6131863fd6cbb1 /src/mochiweb
parent4875101eafd9852c4944eedbe65fd31045a73ef7 (diff)
validate input strings containing escape characters, COUCHDB-875
git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@991073 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'src/mochiweb')
-rw-r--r--src/mochiweb/mochijson2.erl22
1 files changed, 19 insertions, 3 deletions
diff --git a/src/mochiweb/mochijson2.erl b/src/mochiweb/mochijson2.erl
index eeb25b5b..64cabc86 100644
--- a/src/mochiweb/mochijson2.erl
+++ b/src/mochiweb/mochijson2.erl
@@ -402,8 +402,22 @@ tokenize_string(B, S=#decoder{offset=O}, Acc) ->
Acc1 = lists:reverse(xmerl_ucs:to_utf8(C), Acc),
tokenize_string(B, ?ADV_COL(S, 6), Acc1)
end;
- <<_:O/binary, C, _/binary>> ->
- tokenize_string(B, ?INC_CHAR(S, C), [C | Acc])
+ <<_:O/binary, C1, _/binary>> when C1 < 128 ->
+ tokenize_string(B, ?INC_CHAR(S, C1), [C1 | Acc]);
+ <<_:O/binary, C1, C2, _/binary>> when C1 >= 194, C1 =< 223,
+ C2 >= 128, C2 =< 191 ->
+ tokenize_string(B, ?ADV_COL(S, 2), [C2, C1 | Acc]);
+ <<_:O/binary, C1, C2, C3, _/binary>> when C1 >= 224, C1 =< 239,
+ C2 >= 128, C2 =< 191,
+ C3 >= 128, C3 =< 191 ->
+ tokenize_string(B, ?ADV_COL(S, 3), [C3, C2, C1 | Acc]);
+ <<_:O/binary, C1, C2, C3, C4, _/binary>> when C1 >= 240, C1 =< 244,
+ C2 >= 128, C2 =< 191,
+ C3 >= 128, C3 =< 191,
+ C4 >= 128, C4 =< 191 ->
+ tokenize_string(B, ?ADV_COL(S, 4), [C4, C3, C2, C1 | Acc]);
+ _ ->
+ throw(invalid_utf8)
end.
tokenize_number(B, S) ->
@@ -648,7 +662,9 @@ input_validation_test() ->
<<?Q, 16#E0, 16#80,16#7F, ?Q>>,
<<?Q, 16#F0, 16#80, 16#80, 16#7F, ?Q>>,
%% we don't support code points > 10FFFF per RFC 3629
- <<?Q, 16#F5, 16#80, 16#80, 16#80, ?Q>>
+ <<?Q, 16#F5, 16#80, 16#80, 16#80, ?Q>>,
+ %% escape characters trigger a different code path
+ <<?Q, $\\, $\n, 16#80, ?Q>>
],
lists:foreach(
fun(X) ->