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ext/sqlite3: reject NUL bytes in SQLite3::escapeString() #176

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ext/sqlite3: reject NUL bytes in SQLite3::escapeString() #176

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5 changes: 5 additions & 0 deletions ext/sqlite3/sqlite3.c
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Original file line number Diff line number Diff line change
Expand Up @@ -473,6 +473,11 @@ PHP_METHOD(SQLite3, escapeString)
RETURN_THROWS();
}

if (UNEXPECTED(zend_str_has_nul_byte(sql))) {
zend_argument_value_error(1, "must not contain null bytes");
RETURN_THROWS();
}

if (ZSTR_LEN(sql)) {
ret = sqlite3_mprintf("%q", ZSTR_VAL(sql));
if (ret) {
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35 changes: 35 additions & 0 deletions ext/sqlite3/tests/gh_sqlite3_escapestring_nul.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
--TEST--
SQLite3::escapeString() rejects strings with embedded NUL bytes
--EXTENSIONS--
sqlite3
--FILE--
<?php

$cases = [
"\0",
"a\0b",
"secret\0x",
"foo\0\0bar",
];

foreach ($cases as $in) {
try {
SQLite3::escapeString($in);
echo "FAIL: no exception for ", bin2hex($in), "\n";
} catch (ValueError $e) {
echo "ValueError: ", $e->getMessage(), "\n";
}
}

echo "ok: ", SQLite3::escapeString("ok"), "\n";
echo "quote: ", SQLite3::escapeString("test''%"), "\n";
echo "empty: ", var_export(SQLite3::escapeString(""), true), "\n";
?>
--EXPECT--
ValueError: SQLite3::escapeString(): Argument #1 ($string) must not contain null bytes
ValueError: SQLite3::escapeString(): Argument #1 ($string) must not contain null bytes
ValueError: SQLite3::escapeString(): Argument #1 ($string) must not contain null bytes
ValueError: SQLite3::escapeString(): Argument #1 ($string) must not contain null bytes
ok: ok
quote: test''''%
empty: ''
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