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Commit78bf0a2

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hstore: Tighten key/value parsing check for whitespaces
isspace() can be locale-sensitive depending on the platform, causinghstore to consider as whitespaces characters it should not see as such.For example, U+0105, being decoded as 0xC4 0x85 in UTF-8, would bediscarded from the input given.This problem is similar to9ae2661, though it was missed that hstorecan also manipulate non-ASCII inputs, so replace the existing isspace()calls with scanner_isspace().This problem exists for a long time, so backpatch all the way down.Author: Evan JonesDiscussion:https://postgr.es/m/CA+HWA9awUW0+RV_gO9r1ABZwGoZxPztcJxPy8vMFSTbTfi4jig@mail.gmail.comBackpatch-through: 11
1 parent37236ca commit78bf0a2

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5 files changed

+69
-5
lines changed

5 files changed

+69
-5
lines changed

‎contrib/hstore/Makefile

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -20,7 +20,7 @@ PGFILEDESC = "hstore - key/value pair data type"
2020

2121
HEADERS = hstore.h
2222

23-
REGRESS = hstore
23+
REGRESS = hstore hstore_utf8
2424

2525
ifdefUSE_PGXS
2626
PG_CONFIG = pg_config
Lines changed: 36 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,36 @@
1+
/*
2+
* This test must be run in a database with UTF-8 encoding,
3+
* because other encodings don't support all the characters used.
4+
*/
5+
SELECT getdatabaseencoding() <> 'UTF8'
6+
AS skip_test \gset
7+
\if :skip_test
8+
\quit
9+
\endif
10+
SET client_encoding = utf8;
11+
-- UTF-8 locale bug on macOS: isspace(0x85) returns true. \u0105 encodes
12+
-- as 0xc4 0x85 in UTF-8; the 0x85 was interpreted here as a whitespace.
13+
SELECT E'key\u0105=>value\u0105'::hstore;
14+
hstore
15+
------------------
16+
"keyą"=>"valueą"
17+
(1 row)
18+
19+
SELECT 'keyą=>valueą'::hstore;
20+
hstore
21+
------------------
22+
"keyą"=>"valueą"
23+
(1 row)
24+
25+
SELECT 'ą=>ą'::hstore;
26+
hstore
27+
----------
28+
"ą"=>"ą"
29+
(1 row)
30+
31+
SELECT 'keyąfoo=>valueą'::hstore;
32+
hstore
33+
---------------------
34+
"keyąfoo"=>"valueą"
35+
(1 row)
36+
Lines changed: 8 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,8 @@
1+
/*
2+
* This test must be run in a database with UTF-8 encoding,
3+
* because other encodings don't support all the characters used.
4+
*/
5+
SELECT getdatabaseencoding() <> 'UTF8'
6+
AS skip_test \gset
7+
\if :skip_test
8+
\quit

‎contrib/hstore/hstore_io.c

Lines changed: 5 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -12,6 +12,7 @@
1212
#include"hstore.h"
1313
#include"lib/stringinfo.h"
1414
#include"libpq/pqformat.h"
15+
#include"parser/scansup.h"
1516
#include"utils/builtins.h"
1617
#include"utils/json.h"
1718
#include"utils/jsonb.h"
@@ -86,7 +87,7 @@ get_val(HSParser *state, bool ignoreeq, bool *escaped)
8687
{
8788
st=GV_WAITESCIN;
8889
}
89-
elseif (!isspace((unsignedchar)*(state->ptr)))
90+
elseif (!scanner_isspace((unsignedchar)*(state->ptr)))
9091
{
9192
*(state->cur)=*(state->ptr);
9293
state->cur++;
@@ -109,7 +110,7 @@ get_val(HSParser *state, bool ignoreeq, bool *escaped)
109110
state->ptr--;
110111
return true;
111112
}
112-
elseif (isspace((unsignedchar)*(state->ptr)))
113+
elseif (scanner_isspace((unsignedchar)*(state->ptr)))
113114
{
114115
return true;
115116
}
@@ -217,7 +218,7 @@ parse_hstore(HSParser *state)
217218
{
218219
elog(ERROR,"Unexpected end of string");
219220
}
220-
elseif (!isspace((unsignedchar)*(state->ptr)))
221+
elseif (!scanner_isspace((unsignedchar)*(state->ptr)))
221222
{
222223
elog(ERROR,"Syntax error near '%c' at position %d",*(state->ptr), (int32) (state->ptr-state->begin));
223224
}
@@ -265,7 +266,7 @@ parse_hstore(HSParser *state)
265266
{
266267
return;
267268
}
268-
elseif (!isspace((unsignedchar)*(state->ptr)))
269+
elseif (!scanner_isspace((unsignedchar)*(state->ptr)))
269270
{
270271
elog(ERROR,"Syntax error near '%c' at position %d",*(state->ptr), (int32) (state->ptr-state->begin));
271272
}

‎contrib/hstore/sql/hstore_utf8.sql

Lines changed: 19 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,19 @@
1+
/*
2+
* This test must be run in a database with UTF-8 encoding,
3+
* because other encodings don't support all the characters used.
4+
*/
5+
6+
SELECT getdatabaseencoding()<>'UTF8'
7+
AS skip_test \gset
8+
\if :skip_test
9+
\quit
10+
\endif
11+
12+
SET client_encoding= utf8;
13+
14+
-- UTF-8 locale bug on macOS: isspace(0x85) returns true. \u0105 encodes
15+
-- as 0xc4 0x85 in UTF-8; the 0x85 was interpreted here as a whitespace.
16+
SELECT E'key\u0105=>value\u0105'::hstore;
17+
SELECT'keyą=>valueą'::hstore;
18+
SELECT'ą=>ą'::hstore;
19+
SELECT'keyąfoo=>valueą'::hstore;

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