Improving SQLite table schema parsing (#2678)

Author: stamparm

data/xml/queries.xml

@@ -357,8 +357,8 @@
             <blind query="SELECT tbl_name FROM sqlite_master WHERE type='table' LIMIT %d,1" count="SELECT COUNT(tbl_name) FROM sqlite_master WHERE type='table'"/>
         </tables>
         <columns>
-            <inband query="SELECT MAX(sql) FROM sqlite_master WHERE tbl_name='%s'"/>
-            <blind query="SELECT sql FROM sqlite_master WHERE tbl_name='%s' LIMIT 1" condition=""/>
+            <inband query="SELECT MAX(sql) FROM sqlite_master WHERE type='table' AND tbl_name='%s'"/>
+            <blind query="SELECT sql FROM sqlite_master WHERE type='table' AND tbl_name='%s' LIMIT 1" condition=""/>
         </columns>
         <dump_table>
             <inband query="SELECT %s FROM %s"/>

extra/vulnserver/vulnserver.py

@@ -44,7 +44,8 @@
     CREATE TABLE users (
         id INTEGER,
         name TEXT,
-        surname TEXT
+        surname TEXT,
+        PRIMARY KEY (id)
     );
     INSERT INTO users (id, name, surname) VALUES (1, 'luther', 'blisset');
     INSERT INTO users (id, name, surname) VALUES (2, 'fluffy', 'bunny');

lib/core/common.py

@@ -3402,19 +3402,39 @@ def parseSqliteTableSchema(value):
     >>> kb.data.cachedColumns = {}
     >>> parseSqliteTableSchema("CREATE TABLE users(\\n\\t\\tid INTEGER,\\n\\t\\tname TEXT\\n);")
     True
-    >>> repr(kb.data.cachedColumns).count(',') == 1
+    >>> tuple(kb.data.cachedColumns[conf.db][conf.tbl].items()) == (('id', 'INTEGER'), ('name', 'TEXT'))
+    True
+    >>> parseSqliteTableSchema("CREATE TABLE dummy(`foo bar` BIGINT, \\"foo\\" VARCHAR, 'bar' TEXT)");
+    True
+    >>> tuple(kb.data.cachedColumns[conf.db][conf.tbl].items()) == (('foo bar', 'BIGINT'), ('foo', 'VARCHAR'), ('bar', 'TEXT'))
+    True
+    >>> parseSqliteTableSchema("CREATE TABLE suppliers(\\n\\tsupplier_id INTEGER PRIMARY KEY DESC,\\n\\tname TEXT NOT NULL\\n);");
+    True
+    >>> tuple(kb.data.cachedColumns[conf.db][conf.tbl].items()) == (('supplier_id', 'INTEGER'), ('name', 'TEXT'))
+    True
+    >>> parseSqliteTableSchema("CREATE TABLE country_languages (\\n\\tcountry_id INTEGER NOT NULL,\\n\\tlanguage_id INTEGER NOT NULL,\\n\\tPRIMARY KEY (country_id, language_id),\\n\\tFOREIGN KEY (country_id) REFERENCES countries (country_id) ON DELETE CASCADE ON UPDATE NO ACTION,\\tFOREIGN KEY (language_id) REFERENCES languages (language_id) ON DELETE CASCADE ON UPDATE NO ACTION);");
+    True
+    >>> tuple(kb.data.cachedColumns[conf.db][conf.tbl].items()) == (('country_id', 'INTEGER'), ('language_id', 'INTEGER'))
     True
     """
 
     retVal = False
 
+    value = extractRegexResult(r"(?s)\((?P<result>.+)\)", value)
+
     if value:
         table = {}
-        columns = {}
+        columns = OrderedDict()
+
+        value = re.sub(r"\(.+?\)", "", value).strip()
 
-        for match in re.finditer(r"[(,]\s*[\"'`]?(\w+)[\"'`]?(?:\s+(INT|INTEGER|TINYINT|SMALLINT|MEDIUMINT|BIGINT|UNSIGNED BIG INT|INT2|INT8|INTEGER|CHARACTER|VARCHAR|VARYING CHARACTER|NCHAR|NATIVE CHARACTER|NVARCHAR|TEXT|CLOB|LONGTEXT|BLOB|NONE|REAL|DOUBLE|DOUBLE PRECISION|FLOAT|REAL|NUMERIC|DECIMAL|BOOLEAN|DATE|DATETIME|NUMERIC)\b)?", decodeStringEscape(value), re.I):
+        for match in re.finditer(r"(?:\A|,)\s*(([\"'`]).+?\2|\w+)(?:\s+(INT|INTEGER|TINYINT|SMALLINT|MEDIUMINT|BIGINT|UNSIGNED BIG INT|INT2|INT8|INTEGER|CHARACTER|VARCHAR|VARYING CHARACTER|NCHAR|NATIVE CHARACTER|NVARCHAR|TEXT|CLOB|LONGTEXT|BLOB|NONE|REAL|DOUBLE|DOUBLE PRECISION|FLOAT|REAL|NUMERIC|DECIMAL|BOOLEAN|DATE|DATETIME|NUMERIC)\b)?", decodeStringEscape(value), re.I):
+            column = match.group(1).strip(match.group(2) or "")
+            if re.search(r"(?i)\A(CONSTRAINT|PRIMARY|UNIQUE|CHECK|FOREIGN)\b", column.strip()):
+                continue
             retVal = True
-            columns[match.group(1)] = match.group(2) or "TEXT"
+
+            columns[column] = match.group(3) or "TEXT"
 
         table[safeSQLIdentificatorNaming(conf.tbl, True)] = columns
         kb.data.cachedColumns[conf.db] = table

lib/core/settings.py

@@ -20,7 +20,7 @@
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.6.12.1"
+VERSION = "1.6.12.2"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)