Python：Sqlmap源码精读之解析xml

2019-11-14 17:41:24

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xml

<?xml version="1.0" encoding="UTF-8"?><root>    <!-- MySQL -->    <dbms value="MySQL">        <cast query="CAST(%s AS CHAR)"/>        <length query="LENGTH(%s)"/>        <isnull query="IFNULL(%s,' ')"/>        <delimiter query=","/>        <limit query="LIMIT %d,%d"/>        <limitregexp query="/s+LIMIT/s+([/d]+)/s*/,/s*([/d]+)"/>        <limitgroupstart query="1"/>        <limitgroupstop query="2"/>        <limitstring query=" LIMIT "/>        <order query="ORDER BY %s ASC"/>        <count query="COUNT(%s)"/>        <comment query="-- " query2="/*" query3="#"/>        <!--             NOTE: MySQL 5.0.12 introduced SLEEP() function                   References:                   * http://dev.mysql.com/doc/refman/5.0/en/news-5-0-12.html                   * http://dev.mysql.com/doc/refman/5.1/en/miscellaneous-functions.html#function_sleep        -->        <timedelay query="SELECT SLEEP(%d)" query2="SELECT BENCHMARK(5000000,md5('%d'))"/>        <substring query="MID((%s),%d,%d)"/>        <case query="SELECT (CASE WHEN (%s) THEN 1 ELSE 0 END)"/>        <inference query="ORD(MID((%s),%d,1)) > %d"/>        <banner query="VERSION()"/>        <current_user query="CURRENT_USER()"/>        <current_db query="DATABASE()"/>        <is_dba query="(SELECT super_PRiv FROM mysql.user WHERE user='%s' LIMIT 0,1)='Y'"/>        <check_udf query="(SELECT name FROM mysql.func WHERE name='%s' LIMIT 0,1)='%s'"/>        <users>            <inband query="SELECT grantee FROM information_schema.USER_PRIVILEGES" query2="SELECT user FROM mysql.user"/>            <blind query="SELECT DISTINCT(grantee) FROM information_schema.USER_PRIVILEGES LIMIT %d,1" query2="SELECT DISTINCT(user) FROM mysql.user LIMIT %d,1" count="SELECT COUNT(DISTINCT(grantee)) FROM information_schema.USER_PRIVILEGES" count2="SELECT COUNT(DISTINCT(user)) FROM mysql.user"/>        </users>        <passWords>            <inband query="SELECT user,password FROM mysql.user" condition="user"/>            <blind query="SELECT DISTINCT(password) FROM mysql.user WHERE user='%s' LIMIT %d,1" count="SELECT COUNT(DISTINCT(password)) FROM mysql.user WHERE user='%s'"/>        </passwords>        <privileges>            <inband query="SELECT grantee,privilege_type FROM information_schema.USER_PRIVILEGES" condition="grantee" query2="SELECT user,select_priv,insert_priv,update_priv,delete_priv,create_priv,drop_priv,reload_priv,shutdown_priv,process_priv,file_priv,grant_priv,references_priv,index_priv,alter_priv,show_db_priv,super_priv,create_tmp_table_priv,lock_tables_priv,execute_priv,repl_slave_priv,repl_client_priv,create_view_priv,show_view_priv,create_routine_priv,alter_routine_priv,create_user_priv FROM mysql.user" condition2="user"/>            <blind query="SELECT DISTINCT(privilege_type) FROM information_schema.USER_PRIVILEGES WHERE grantee%s%s LIMIT %d,1" query2="SELECT select_priv,insert_priv,update_priv,delete_priv,create_priv,drop_priv,reload_priv,shutdown_priv,process_priv,file_priv,grant_priv,references_priv,index_priv,alter_priv,show_db_priv,super_priv,create_tmp_table_priv,lock_tables_priv,execute_priv,repl_slave_priv,repl_client_priv,create_view_priv,show_view_priv,create_routine_priv,alter_routine_priv,create_user_priv FROM mysql.user WHERE user='%s' LIMIT %d,1" count="SELECT COUNT(DISTINCT(privilege_type)) FROM information_schema.USER_PRIVILEGES WHERE grantee%s%s" count2="SELECT COUNT(*) FROM mysql.user WHERE user='%s'"/>        </privileges>        <roles/>        <dbs>            <inband query="SELECT schema_name FROM information_schema.SCHEMATA" query2="SELECT db FROM mysql.db"/>            <blind query="SELECT DISTINCT(schema_name) FROM information_schema.SCHEMATA LIMIT %d,1" query2="SELECT DISTINCT(db) FROM mysql.db LIMIT %d,1" count="SELECT COUNT(DISTINCT(schema_name)) FROM information_schema.SCHEMATA" count2="SELECT COUNT(DISTINCT(db)) FROM mysql.db"/>        </dbs>        <tables>            <inband query="SELECT table_schema,table_name FROM information_schema.TABLES" condition="table_schema"/>            <blind query="SELECT table_name FROM information_schema.TABLES WHERE table_schema='%s' LIMIT %d,1" count="SELECT COUNT(table_name) FROM information_schema.TABLES WHERE table_schema='%s'"/>        </tables>        <columns>            <inband query="SELECT column_name,column_type FROM information_schema.COLUMNS WHERE table_name='%s' AND table_schema='%s'" condition="column_name"/>            <blind query="SELECT column_name FROM information_schema.COLUMNS WHERE table_name='%s' AND table_schema='%s'" query2="SELECT column_type FROM information_schema.COLUMNS WHERE table_name='%s' AND column_name='%s' AND table_schema='%s'" count="SELECT COUNT(column_name) FROM information_schema.COLUMNS WHERE table_name='%s' AND table_schema='%s'" condition="column_name"/>        </columns>        <dump_table>            <inband query="SELECT %s FROM %s.%s"/>            <blind query="SELECT %s FROM %s.%s LIMIT %d,1" count="SELECT COUNT(*) FROM %s.%s"/>        </dump_table>        <search_db>            <inband query="SELECT schema_name FROM information_schema.SCHEMATA WHERE " query2="SELECT db FROM mysql.db WHERE " condition="schema_name" condition2="db"/>            <blind query="SELECT DISTINCT(schema_name) FROM information_schema.SCHEMATA WHERE " query2="SELECT DISTINCT(db) FROM mysql.db WHERE " count="SELECT COUNT(DISTINCT(schema_name)) FROM information_schema.SCHEMATA WHERE " count2="SELECT COUNT(DISTINCT(db)) FROM mysql.db WHERE " condition="schema_name" condition2="db"/>        </search_db>        <search_table>            <inband query="SELECT table_schema,table_name FROM information_schema.TABLES WHERE " condition="table_name" condition2="table_schema"/>            <blind query="SELECT DISTINCT(table_schema) FROM information_schema.TABLES WHERE " query2="SELECT DISTINCT(table_name) FROM information_schema.TABLES WHERE table_schema='%s'" count="SELECT COUNT(DISTINCT(table_schema)) FROM information_schema.TABLES WHERE " count2="SELECT COUNT(DISTINCT(table_name)) FROM information_schema.TABLES WHERE table_schema='%s'" condition="table_name" condition2="table_schema"/>        </search_table>        <search_column>            <inband query="SELECT table_schema,table_name FROM information_schema.COLUMNS WHERE " condition="column_name" condition2="table_schema"/>            <blind query="SELECT DISTINCT(table_schema) FROM information_schema.COLUMNS WHERE " query2="SELECT DISTINCT(table_name) FROM information_schema.COLUMNS WHERE table_schema='%s'" count="SELECT COUNT(DISTINCT(table_schema)) FROM information_schema.COLUMNS WHERE " count2="SELECT COUNT(DISTINCT(table_name)) FROM information_schema.COLUMNS WHERE table_schema='%s'" condition="column_name" condition2="table_schema"/>        </search_column>    </dbms>    <!-- PostgreSQL -->    <dbms value="PostgreSQL">        <cast query="CAST(%s AS CHARACTER(10000))"/>        <length query="LENGTH(%s)"/>        <isnull query="COALESCE(%s,' ')"/>        <delimiter query="||"/>        <limit query="OFFSET %d LIMIT %d"/>        <limitregexp query="/s+OFFSET/s+([/d]+)/s+LIMIT/s+([/d]+)"/>        <limitgroupstart query="1"/>        <limitgroupstop query="2"/>        <limitstring query=" OFFSET "/>        <order query="ORDER BY %s ASC"/>        <count query="COUNT(%s)"/>        <comment query="--" query2="/*"/>        <!--             NOTE: PostgreSQL 8.2 introduced PG_SLEEP() function                   References:                   * http://www.postgresql.org/docs/8.3/interactive/release-8-2.html                   * http://www.postgresql.org/docs/8.3/interactive/functions-datetime.html#FUNCTIONS-DATETIME-DELAY        -->        <timedelay query="SELECT PG_SLEEP(%d)" query2="SELECT 'sqlmap' WHERE exists(SELECT * FROM generate_series(1,300000%d))" query3="CREATE OR REPLACE FUNCTION sleep(int) RETURNS int AS '/lib/libc.so.6','sleep' language 'C' STRICT; SELECT sleep(%d)"/>        <substring query="SUBSTR((%s)::text,%d,%d)"/>        <case query="SELECT (CASE WHEN (%s) THEN '1' ELSE '0' END)"/>        <inference query="ASCII(SUBSTR((%s)::text,%d,1)) > %d"/>        <banner query="SELECT VERSION()"/>        <current_user query="SELECT CURRENT_USER"/>        <current_db query="SELECT CURRENT_DATABASE()"/>        <is_dba query="(SELECT usesuper=true FROM pg_user WHERE usename=CURRENT_USER OFFSET 0 LIMIT 1)"/>        <check_udf query="(SELECT proname='%s' FROM pg_proc WHERE proname='%s' OFFSET 0 LIMIT 1)"/>        <users>            <inband query="SELECT usename FROM pg_user"/>            <blind query="SELECT DISTINCT(usename) FROM pg_user OFFSET %d LIMIT 1" count="SELECT COUNT(DISTINCT(usename)) FROM pg_user"/>        </users>        <passwords>            <inband query="SELECT usename,passwd FROM pg_shadow" condition="usename"/>            <blind query="SELECT DISTINCT(passwd) FROM pg_shadow WHERE usename='%s' OFFSET %d LIMIT 1" count="SELECT COUNT(DISTINCT(passwd)) FROM pg_shadow WHERE usename='%s'"/>        </passwords>        <privileges>            <inband query="SELECT usename,(CASE WHEN usecreatedb THEN 1 ELSE 0 END),(CASE WHEN usesuper THEN 1 ELSE 0 END),(CASE WHEN usecatupd THEN 1 ELSE 0 END) FROM pg_user" condition="usename"/>            <blind query="SELECT (CASE WHEN usecreatedb THEN 1 ELSE 0 END),(CASE WHEN usesuper THEN 1 ELSE 0 END),(CASE WHEN usecatupd THEN 1 ELSE 0 END) FROM pg_user WHERE usename='%s' OFFSET %d LIMIT 1" count="SELECT COUNT(DISTINCT(usename)) FROM pg_user WHERE usename='%s'"/>        </privileges>        <roles/>        <dbs>            <inband query="SELECT datname FROM pg_database"/>            <blind query="SELECT DISTINCT(datname) FROM pg_database OFFSET %d LIMIT 1" count="SELECT COUNT(DISTINCT(datname)) FROM pg_database"/>        </dbs>        <tables>            <inband query="SELECT schemaname,tablename FROM pg_tables" condition="schemaname"/>            <blind query="SELECT tablename FROM pg_tables WHERE schemaname='%s' OFFSET %d LIMIT 1" count="SELECT COUNT(tablename) FROM pg_tables WHERE schemaname='%s'"/>        </tables>        <columns>            <inband query="SELECT attname,typname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND a.relname='%s' AND nspname='%s'" condition="attname"/>            <blind query="SELECT attname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND a.relname='%s' AND nspname='%s'" query2="SELECT typname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relname='%s' AND a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND attname='%s' AND nspname='%s'" count="SELECT COUNT(attname) FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND a.relname='%s' AND nspname='%s'" condition="attname"/>        </columns>        <dump_table>            <inband query="SELECT %s FROM %s.%s"/>            <blind query="SELECT %s FROM %s.%s OFFSET %d LIMIT 1" count="SELECT COUNT(*) FROM %s.%s"/>        </dump_table>        <search_db>            <inband query="SELECT datname FROM pg_database WHERE " query2="" condition="datname" condition2=""/>            <blind query="SELECT DISTINCT(datname) FROM pg_database WHERE " query2="" count="SELECT COUNT(DISTINCT(datname)) FROM pg_database WHERE " count2="" condition="datname" condition2=""/>        </search_db>        <search_table>            <inband query="SELECT schemaname,tablename FROM pg_tables WHERE " condition="tablename" condition2="schemaname"/>            <blind query="SELECT DISTINCT(schemaname) FROM pg_tables WHERE " query2="SELECT tablename FROM pg_tables WHERE schemaname='%s'" count="SELECT COUNT(DISTINCT(schemaname)) FROM pg_tables WHERE " count2="SELECT COUNT(tablename) FROM pg_tables WHERE schemaname='%s'" condition="tablename" condition2="schemaname"/>        </search_table>        <search_column>            <inband query="SELECT nspname,relname FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND " condition="attname" condition2="nspname"/>            <blind query="SELECT DISTINCT(nspname) FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND " query2="SELECT DISTINCT(relname) FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND nspname='%s'" count="SELECT COUNT(DISTINCT(nspname)) FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND " count2="SELECT COUNT(DISTINCT(relname)) FROM pg_namespace,pg_type,pg_attribute b JOIN pg_class a ON a.oid=b.attrelid WHERE a.relnamespace=pg_namespace.oid AND pg_type.oid=b.atttypid AND attnum>0 AND nspname='%s'" condition="attname" condition2="nspname"/>        </search_column>    </dbms>    <!-- Microsoft SQL Server -->    <dbms value="Microsoft SQL Server">        <cast query="CAST(%s AS NVARCHAR(4000))"/>        <length query="LTRIM(STR(LEN(%s)))"/>        <isnull query="ISNULL(%s,' ')"/>        <delimiter query="+"/>        <limit query="SELECT TOP %d "/>        <limitregexp query="TOP/s+([/d]+)/s+.+?/s+FROM/s+.+?/s+WHERE/s+.+?/s+NOT/s+IN/s+/(SELECT/s+TOP/s+([/d]+)/s+"/>        <limitgroupstart query="2"/>        <limitgroupstop query="1"/>        <limitstring/>        <order query="ORDER BY %s ASC"/>        <count query="COUNT(%s)"/>        <comment query="--" query2="/*"/>        <timedelay query="WAITFOR DELAY '0:0:%d'"/>        <substring query="SUBSTRING((%s),%d,%d)"/>        <case query="SELECT (CASE WHEN (%s) THEN '1' ELSE '0' END)"/>        <inference query="ASCII(SUBSTRING((%s),%d,1)) > %d"/>        <banner query="SELECT @@VERSION"/>        <current_user query="SELECT SYSTEM_USER"/>        <current_db query="SELECT DB_NAME()"/>        <is_dba query="IS_SRVROLEMEMBER('sysadmin')=1" query2="IS_SRVROLEMEMBER('sysadmin','%s')=1"/>        <users>            <inband query="SELECT name FROM master..syslogins" query2="SELECT name FROM sys.sql_logins"/>            <!-- NOTE: in NOT IN kind of queries ORDER BY is a must -->            <blind query="SELECT TOP 1 name FROM master..syslogins WHERE name NOT IN (SELECT TOP %d name FROM master..syslogins ORDER BY name) ORDER BY name" query2="SELECT TOP 1 name FROM sys.sql_logins WHERE name NOT IN (SELECT TOP %d name FROM sys.sql_logins ORDER BY name) ORDER BY name" count="SELECT LTRIM(STR(COUNT(name))) FROM master..syslogins" count2="SELECT LTRIM(STR(COUNT(name))) FROM sys.sql_logins"/>        </users>        <passwords>            <inband query="SELECT name,master.dbo.fn_varbintohexstr(password) FROM master..sysxlogins" query2="SELECT name,master.dbo.fn_varbintohexstr(password_hash) FROM sys.sql_logins" condition="name"/>            <blind query="SELECT TOP 1 master.dbo.fn_varbintohexstr(password) FROM master..sysxlogins WHERE name='%s' AND password NOT IN (SELECT TOP %d password FROM master..sysxlogins WHERE name='%s' ORDER BY password) ORDER BY password" query2="SELECT TOP 1 master.dbo.fn_varbintohexstr(password_hash) FROM sys.sql_logins WHERE name='%s' AND password_hash NOT IN (SELECT TOP %d password_hash FROM sys.sql_logins WHERE name='%s' ORDER BY password_hash) ORDER BY password_hash" count="SELECT LTRIM(STR(COUNT(password))) FROM master..sysxlogins WHERE name='%s'" count2="SELECT LTRIM(STR(COUNT(password_hash))) FROM sys.sql_logins WHERE name='%s'"/>        </passwords>        <!-- NOTE: in Microsoft SQL Server there is no query to enumerate DBMS users privileges -->        <privileges/>        <roles/>        <dbs>            <inband query="SELECT name FROM master..sysdatabases"/>            <blind query="SELECT TOP 1 name FROM master..sysdatabases WHERE name NOT IN (SELECT TOP %d name FROM master..sysdatabases ORDER BY name) ORDER BY name" count="SELECT LTRIM(STR(COUNT(name))) FROM master..sysdatabases"/>        </dbs>        <tables>            <inband query="SELECT sysusers.name+'.'+sysobjects.name FROM %s..sysobjects INNER JOIN sysusers ON sysobjects.uid = sysusers.uid WHERE xtype IN ('u', 'v')"/>            <blind query="SELECT TOP 1 sysusers.name+'.'+sysobjects.name FROM %s..sysobjects INNER JOIN sysusers ON sysobjects.uid = sysusers.uid WHERE xtype IN ('u', 'v') AND sysusers.name+'.'+sysobjects.name NOT IN (SELECT TOP %d sysusers.name+'.'+sysobjects.name FROM %s..sysobjects INNER JOIN sysusers ON sysobjects.uid = sysusers.uid WHERE xtype IN ('u', 'v') ORDER BY sysusers.name+'.'+sysobjects.name) ORDER BY sysusers.name+'.'+sysobjects.name" count="SELECT LTRIM(STR(COUNT(name))) FROM %s..sysobjects WHERE xtype IN ('u','v')"/>        </tables>        <columns>            <inband query="SELECT %s..syscolumns.name,TYPE_NAME(%s..syscolumns.xtype) FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.name='%s'" condition="[DB]..syscolumns.name"/>            <blind query="SELECT %s..syscolumns.name FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.name='%s'" query2="SELECT TYPE_NAME(%s..syscolumns.xtype) FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.name='%s' AND %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.name='%s'" count="SELECT LTRIM(STR(COUNT(name))) FROM %s..syscolumns WHERE id=(SELECT id FROM %s..sysobjects WHERE name='%s')" condition="[DB]..syscolumns.name"/>        </columns>        <dump_table>            <inband query="SELECT %s FROM %s.%s"/>            <blind query="SELECT MIN(%s) FROM %s WHERE CONVERT(NVARCHAR(4000),%s)>'%s'" query2="SELECT MAX(%s) FROM %s WHERE CONVERT(NVARCHAR(4000),%s) LIKE '%s'" count="SELECT LTRIM(STR(COUNT(*))) FROM %s" count2="SELECT LTRIM(STR(COUNT(DISTINCT(%s)))) FROM %s"/>        </dump_table>        <search_db>            <inband query="SELECT name FROM master..sysdatabases WHERE " condition="name"/>            <blind query="SELECT name FROM master..sysdatabases WHERE " count="SELECT LTRIM(STR(COUNT(name))) FROM master..sysdatabases WHERE " condition="name"/>        </search_db>        <search_table>            <inband query="SELECT name FROM %s..sysobjects WHERE xtype IN ('u','v') AND " condition="name" condition2="name"/>            <blind query="" query2="SELECT name FROM %s..sysobjects WHERE xtype IN ('u','v') " count="" count2="SELECT LTRIM(STR(COUNT(name))) FROM %s..sysobjects WHERE xtype IN ('u','v')" condition="name" condition2="name"/>        </search_table>        <search_column>            <inband query="SELECT %s..sysobjects.name FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.xtype in ('u', 'v')" condition="[DB]..syscolumns.name"/>            <blind query="" query2="SELECT %s..sysobjects.name FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id  AND %s..sysobjects.xtype in ('u', 'v')" count="" count2="SELECT COUNT(%s..sysobjects.name) FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id" condition="[DB]..syscolumns.name"/>        </search_column>    </dbms>    <!-- Oracle -->    <dbms value="Oracle">        <cast query="CAST(%s AS VARCHAR(4000))"/>        <length query="LENGTH(%s)"/>        <isnull query="NVL(%s,' ')"/>        <delimiter query="||"/>        <limit query="ROWNUM AS LIMIT %s) WHERE LIMIT"/>        <limitregexp query="ROWNUM/s+AS/s+.+?/s+FROM/s+.+?/)/s+WHERE/s+.+?/s*=/s*[/d]+|ROWNUM/s*=/s*[/d]+"/>        <limitgroupstart/>        <limitgroupstop/>        <limitstring/>        <order query="ORDER BY %s ASC"/>        <count query="COUNT(%s)"/>        <comment query="--"/>        <timedelay query="BEGIN DBMS_LOCK.SLEEP(%d); END" query2="EXEC DBMS_LOCK.SLEEP(%d.00)" query3="EXEC USER_LOCK.SLEEP(%d.00)"/>        <substring query="SUBSTR((%s),%d,%d)"/>        <case query="SELECT (CASE WHEN (%s) THEN 1 ELSE 0 END)"/>        <inference query="ASCII(SUBSTR((%s),%d,1)) > %d"/>        <banner query="SELECT banner FROM v$version WHERE ROWNUM=1"/>        <current_user query="SELECT USER FROM DUAL"/>        <!--        NOTE: current physical DB but not usable for enumeration        <current_db query="SELECT SYS.DATABASE_NAME FROM DUAL"/>        -->        <current_db query="SELECT USER FROM DUAL"/>        <!--             NOTE: in Oracle to check if the session user is DBA you can use:             SELECT USERENV('ISDBA') FROM DUAL        -->        <is_dba query="(SELECT GRANTED_ROLE FROM DBA_ROLE_PRIVS WHERE GRANTEE=USER AND GRANTED_ROLE='DBA')='DBA'"/>        <users>            <inband query="SELECT USERNAME FROM SYS.ALL_USERS"/>            <blind query="SELECT DISTINCT(USERNAME) FROM (SELECT DISTINCT(USERNAME),ROWNUM AS LIMIT FROM SYS.ALL_USERS) WHERE LIMIT=%d" count="SELECT COUNT(DISTINCT(USERNAME)) FROM SYS.ALL_USERS"/>        </users>        <passwords>            <inband query="SELECT NAME,PASSWORD FROM SYS.USER$" condition="NAME"/>            <blind query="SELECT DISTINCT(PASSWORD) FROM (SELECT DISTINCT(PASSWORD),ROWNUM AS LIMIT FROM SYS.USER$ WHERE NAME='%s') WHERE LIMIT=%d" count="SELECT COUNT(DISTINCT(PASSWORD)) FROM SYS.USER$ WHERE NAME='%s'"/>        </passwords>        <!--             NOTE: in Oracle to enumerate the privileges for the session user you can use:             SELECT * FROM SESSION_PRIVS        -->        <privileges>            <inband query="SELECT GRANTEE,PRIVILEGE FROM DBA_SYS_PRIVS" query2="SELECT USERNAME,PRIVILEGE FROM USER_SYS_PRIVS" condition="GRANTEE" condition2="USERNAME"/>            <blind query="SELECT DISTINCT(PRIVILEGE) FROM (SELECT DISTINCT(PRIVILEGE),ROWNUM AS LIMIT FROM DBA_SYS_PRIVS WHERE GRANTEE='%s') WHERE LIMIT=%d" query2="SELECT DISTINCT(PRIVILEGE) FROM (SELECT DISTINCT(PRIVILEGE),ROWNUM AS LIMIT FROM USER_SYS_PRIVS WHERE USERNAME='%s') WHERE LIMIT=%d" count="SELECT COUNT(DISTINCT(PRIVILEGE)) FROM DBA_SYS_PRIVS WHERE GRANTEE='%s'" count2="SELECT COUNT(DISTINCT(PRIVILEGE)) FROM USER_SYS_PRIVS WHERE USERNAME='%s'"/>        </privileges>        <!--             NOTE: in Oracle to enumerate the roles for the session user you can use:             SELECT * FROM SESSION_ROLES        -->        <roles>            <inband query="SELECT GRANTEE,GRANTED_ROLE FROM DBA_ROLE_PRIVS" query2="SELECT USERNAME,GRANTED_ROLE FROM USER_ROLE_PRIVS" condition="GRANTEE" condition2="USERNAME"/>            <blind query="SELECT DISTINCT(GRANTED_ROLE) FROM (SELECT DISTINCT(GRANTED_ROLE),ROWNUM AS LIMIT FROM DBA_ROLE_PRIVS WHERE GRANTEE='%s') WHERE LIMIT=%d" query2="SELECT DISTINCT(GRANTED_ROLE) FROM (SELECT DISTINCT(GRANTED_ROLE),ROWNUM AS LIMIT FROM USER_ROLE_PRIVS WHERE USERNAME='%s') WHERE LIMIT=%d" count="SELECT COUNT(DISTINCT(GRANTED_ROLE)) FROM DBA_ROLE_PRIVS WHERE GRANTEE='%s'" count2="SELECT COUNT(DISTINCT(GRANTED_ROLE)) FROM USER_ROLE_PRIVS WHERE USERNAME='%s'"/>        </roles>        <!-- NOTE: in Oracle schema names are the counterpart to database names on other DBMSes -->        <dbs>            <inband query="SELECT OWNER FROM (SELECT DISTINCT(OWNER) FROM SYS.ALL_TABLES)"/>            <blind query="SELECT OWNER FROM (SELECT OWNER,ROWNUM AS LIMIT FROM (SELECT DISTINCT(OWNER) FROM SYS.ALL_TABLES)) WHERE LIMIT=%d" count="SELECT COUNT(DISTINCT(OWNER)) FROM SYS.ALL_TABLES"/>        </dbs>        <tables>            <inband query="SELECT OWNER,TABLE_NAME FROM SYS.ALL_TABLES" condition="OWNER"/>            <blind query="SELECT TABLE_NAME FROM (SELECT TABLE_NAME,ROWNUM AS LIMIT FROM SYS.ALL_TABLES WHERE OWNER='%s') WHERE LIMIT=%d" count="SELECT COUNT(TABLE_NAME) FROM SYS.ALL_TABLES WHERE OWNER='%s'"/>        </tables>        <columns>            <inband query="SELECT COLUMN_NAME,DATA_TYPE FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='%s'" condition="COLUMN_NAME"/>            <blind query="SELECT COLUMN_NAME FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='%s'" query2="SELECT DATA_TYPE FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='%s' AND COLUMN_NAME='%s'" count="SELECT COUNT(COLUMN_NAME) FROM SYS.ALL_TAB_COLUMNS WHERE TABLE_NAME='%s'" condition="COLUMN_NAME"/>        </columns>        <dump_table>            <inband query="SELECT %s FROM %s"/>            <blind query="SELECT %s FROM (SELECT %s,ROWNUM AS LIMIT FROM %s) WHERE LIMIT=%d" count="SELECT COUNT(*) FROM %s"/>        </dump_table>        <search_db/>        <search_table>            <inband query="SELECT OWNER,TABLE_NAME FROM SYS.ALL_TABLES WHERE " condition="TABLE_NAME" condition2="OWNER"/>            <blind query="SELECT DISTINCT(OWNER) FROM SYS.ALL_TABLES WHERE " query2="SELECT TABLE_NAME FROM SYS.ALL_TABLES WHERE OWNER='%s'" count="SELECT COUNT(DISTINCT(OWNER)) FROM SYS.ALL_TABLES WHERE " count2="SELECT COUNT(TABLE_NAME) FROM SYS.ALL_TABLES WHERE OWNER='%s'" condition="TABLE_NAME" condition2="OWNER"/>        </search_table>        <search_column>            <inband query="SELECT TABLE_NAME FROM SYS.ALL_TAB_COLUMNS WHERE " condition="COLUMN_NAME"/>            <blind query="" query2="SELECT DISTINCT(TABLE_NAME) FROM SYS.ALL_TAB_COLUMNS" count="" count2="SELECT COUNT(DISTINCT(TABLE_NAME)) FROM SYS.ALL_TAB_COLUMNS" condition="COLUMN_NAME"/>        </search_column>    </dbms>    <!-- SQLite -->    <dbms value="SQLite">        <cast query="CAST(%s AS VARCHAR(8000))" dbms_version="&gt;=3.0"/>        <length query="LENGTH(%s)"/>        <isnull query="IFNULL(%s,' ')"/>        <delimiter query="||"/>        <limit query="LIMIT %d,%d"/>        <limitregexp query="/s+LIMIT/s+([/d]+)/s*/,/s*([/d]+)"/>        <limitgroupstart query="1"/>        <limitgroupstop query="2"/>        <limitstring query=" LIMIT "/>        <order query="ORDER BY %s ASC"/>        <count query="COUNT(%s)"/>        <comment query="--" query2="/*"/>        <timedelay query="SELECT LIKE('ABCDEFG',UPPER(HEX(RANDOMBLOB(1000000%d))))" dbms_version="&gt;=3.0"/>        <substring query="SUBSTR((%s),%d,%d)"/>        <case query="SELECT (CASE WHEN (%s) THEN 1 ELSE 0 END)"/>        <inference query="SUBSTR((%s),%d,1) > '%c'"/>        <banner query="SELECT SQLITE_VERSION()"/>        <current_user/>        <current_db/>        <is_dba/>        <check_udf/>        <users/>        <passwords/>        <privileges/>        <roles/>        <dbs/>        <tables>            <inband query="SELECT tbl_name FROM sqlite_master WHERE type='table'"/>            <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 MIN(sql) FROM sqlite_master WHERE tbl_name='%s'"/>            <blind query="SELECT sql FROM sqlite_master WHERE tbl_name='%s' LIMIT 1" condition=""/>        </columns>        <dump_table>            <inband query="SELECT %s FROM %s"/>            <blind query="SELECT %s FROM %s LIMIT %d,1" count="SELECT COUNT(*) FROM %s"/>        </dump_table>        <search_db/>        <search_table/>        <search_column/>    </dbms>    <!-- Microsoft access -->    <dbms value="Microsoft Access">        <cast query="CVAR(%s)"/>        <length query="LEN(%s)"/>        <isnull query="IIF(LEN(%s)=0,' ',%s)"/>        <delimiter query=","/>        <limit query="TOP %d"/>        <limitregexp query="/s+TOP/s+([/d]+)"/>        <limitgroupstart query="1"/>        <limitgroupstop query="1"/>        <limitstring query=" TOP "/>        <order query="ORDER BY %s ASC"/>        <count query="COUNT(%s)"/>        <comment query="%00"/>        <timedelay/>        <substring query="MID((%s),%d,%d)"/>        <case query="IIF(%s,1,0)"/>        <banner/>        <!--CURRENTUSER() is not available outside the MS Access query tool itself-->        <current_user/>        <current_db/>        <inference query="ASC(MID((%s),%d,1)) > %d"/>        <is_dba/>        <dbs/>        <!--MSysObjects have no read permission by default-->        <tables>            <blind query="SELECT MIN(Name) FROM MSysObjects WHERE Type=1 AND Name>'%s'" count="SELECT COUNT(Name) FROM MSysObjects WHERE Type=1"/>        </tables>        <dump_table>            <inband query="SELECT %s FROM %s"/>            <blind query="SELECT MIN(%s) FROM %s WHERE CVAR(%s)>'%s'" query2="SELECT TOP 1 %s FROM %s WHERE CVAR(%s) LIKE '%s'" count="SELECT COUNT(*) FROM %s" count2="SELECT COUNT(*) FROM (SELECT DISTINCT %s FROM %s)"/>        </dump_table>        <users/>        <privileges/>        <roles/>        <search_db/>        <search_table/>        <search_column/>   </dbms>   <!-- Firebird -->   <dbms value="Firebird">        <cast query="CAST(%s AS VARCHAR(10000))"/>        <length query="CHAR_LENGTH(%s)"/>        <!-- TODO: add proper value -->        <delimiter query=""/>        <limit query="ROWS %d TO %d"/>        <limitregexp query="/s+ROWS/s+([/d]+)(/s+/TO/s+([/d]+))?"/>        <limitgroupstart query="1"/>        <limitgroupstop query="2"/>        <limitstring query=" ROWS "/>        <isnull query="%s"/>        <order query="ORDER BY %s ASC"/>        <comment query="--"/>        <count query="COUNT(%s)"/>        <timedelay query="SELECT COUNT(*) FROM RDB$DATABASE AS T1,RDB$FIELDS AS T2,RDB$FUNCTIONS AS T3,RDB$TYPES AS T4,RDB$FORMATS AS T5,RDB$COLLATIONS AS T6"/>        <substring query="SUBSTRING((%s) FROM %d FOR %d)"/>        <case query="SELECT IIF(%s,1,0)"/>        <banner query="SELECT RDB$GET_CONTEXT('SYSTEM','ENGINE_VERSION') FROM RDB$DATABASE" dbms_version="&gt;=2.1"/>        <current_user query="SELECT CURRENT_USER FROM RDB$DATABASE"/>        <current_db query="SELECT RDB$GET_CONTEXT('SYSTEM','DB_NAME') FROM RDB$DATABASE"/>        <users>            <inband query="SELECT DISTINCT RDB$USER FROM RDB$USER_PRIVILEGES"/>            <blind query="SELECT FIRST 1 SKip %d DISTINCT(RDB$USER) FROM RDB$USER_PRIVILEGES" count="SELECT COUNT(DISTINCT(RDB$USER)) FROM RDB$USER_PRIVILEGES"/>        </users>        <inference query="ASCII_VAL(SUBSTRING((%s) FROM %d FOR 1)) > %d" dbms_version="&gt;=2.1" query2="SUBSTRING((%s) FROM %d FOR 1) > '%c'"/>        <is_dba query="CURRENT_USER='SYSDBA'"/>        <tables>            <inband query="SELECT RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)"/>            <blind query="SELECT FIRST 1 SKIP %d RDB$RELATION_NAME FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)" count="SELECT COUNT(RDB$RELATION_NAME) FROM RDB$RELATIONS WHERE RDB$VIEW_BLR IS NULL AND (RDB$SYSTEM_FLAG IS NULL OR RDB$SYSTEM_FLAG = 0)"/>        </tables>        <privileges>            <inband query="SELECT RDB$USER,RDB$PRIVILEGE FROM RDB$USER_PRIVILEGES" condition="RDB$USER"/>            <blind query="SELECT FIRST 1 SKIP %d DISTINCT(RDB$PRIVILEGE) FROM RDB$USER_PRIVILEGES WHERE RDB$USER='%s'" count="SELECT COUNT(DISTINCT(RDB$PRIVILEGE)) FROM RDB$USER_PRIVILEGES WHERE RDB$USER='%s'"/>        </privileges>        <roles/>        <dbs/>        <columns>            <!--<inband query="SELECT r.RDB$FIELD_NAME,CASE f.RDB$FIELD_TYPE WHEN 261 THEN 'BLOB' WHEN 14 THEN 'CHAR' WHEN 40 THEN 'CSTRING' WHEN 11 THEN 'D_FLOAT' WHEN 27 THEN 'DOUBLE' WHEN 10 THEN 'FLOAT' WHEN 16 THEN 'INT64' WHEN 8 THEN 'INTEGER' WHEN 9 THEN 'QUAD' WHEN 7 THEN 'SMALLINT' WHEN 12 THEN 'DATE' WHEN 13 THEN 'TIME' WHEN 35 THEN 'TIMESTAMP' WHEN 37 THEN 'VARCHAR' ELSE 'UNKNOWN' END AS field_type FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'"/>-->            <inband query="SELECT r.RDB$FIELD_NAME,f.RDB$FIELD_TYPE FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'"/>            <blind query="SELECT r.RDB$FIELD_NAME FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'" query2="SELECT f.RDB$FIELD_TYPE FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s' AND r.RDB$FIELD_NAME='%s'" count="SELECT COUNT(r.RDB$FIELD_NAME) FROM RDB$RELATION_FIELDS r LEFT JOIN RDB$FIELDS f ON r.RDB$FIELD_SOURCE = f.RDB$FIELD_NAME WHERE r.RDB$RELATION_NAME='%s'"/>        </columns>        <dump_table>            <inband query="SELECT %s FROM %s"/>            <blind query="SELECT FIRST 1 SKIP %d %s FROM %s" count="SELECT COUNT(*) FROM %s"/>        </dump_table>        <search_db/>        <search_table/>        <search_column/>   </dbms>   <!-- http://dev.mysql.com/tech-resources/articles/maxdb-php-ready-for-web.html -->   <!-- http://dev.mysql.com/doc/refman/5.0/es/maxdb-reserved-words.html -->   <!-- http://maxdb.sap.com/doc/7_6/default.htm -->   <!-- http://www.sapdb.org/7.4/htmhelp/35/f8823cb7e5d42be10000000a114027/content.htm -->   <!-- http://www.ximido.de/research/PenTestingMaxDB.pdf -->   <!-- SAP MaxDB -->   <dbms value="SAP MaxDB">        <length query="LENGTH(%s)"/>        <timedelay/>        <banner query="SELECT ID FROM SYSINFO.VERSION"/>        <isnull query="VALUE(%s,' ')" query2="IFNULL(%s,' ')"/>        <comment query="--" query2="#"/>        <count query="COUNT(%s)"/>        <!-- No real cast on SAP MaxDB -->        <cast query="REPLACE(CHR(%s),' ','_')"/>        <current_user query="SELECT USER() FROM DUAL"/>        <current_db query="SELECT DATABASE() FROM DUAL"/>        <order query="ORDER BY %s ASC"/>        <case query="SELECT (CASE WHEN (%s) THEN 1 ELSE 0 END)"/>        <inference query="SUBSTR((%s),%d,1) > '%c'"/>        <delimiter query=","/>        <substring query="SUBSTR((%s),%d,%d)"/>        <users>            <inband query="SELECT username FROM domain.users"/>            <blind query="SELECT MIN(username) FROM domain.users WHERE username > '%s'" count="SELECT CHR(COUNT(*)) FROM domain.users"/>        </users>        <columns>            <inband query="SELECT columnname,datatype,len FROM domain.columns WHERE tablename='%s' AND schemaname=%s"/>            <blind/>        </columns>        <tables>            <inband query="SELECT tablename FROM domain.tables WHERE schemaname=%s AND type='TABLE'"/>            <blind/>        </tables>        <dbs>            <inband query="SELECT DISTINCT(schemaname) FROM domain.tables"/>            <blind/>        </dbs>        <roles>            <inband query="SELECT owner,role FROM domain.roles" condition="owner"/>            <blind/>        </roles>        <dump_table>            <inband query="SELECT %s FROM %%s"/>            <blind query="SELECT MIN(%s) FROM %s WHERE CHR(%s)>'%s'" query2="SELECT MAX(%s) FROM %s WHERE CHR(%s) LIKE '%s'" count="SELECT COUNT(*) FROM %s" count2="SELECT COUNT(*) FROM (SELECT DISTINCT %s FROM %s) AS value_table"/>        </dump_table>   </dbms>    <!-- Sybase -->    <dbms value="Sybase">        <cast query="CONVERT(NVARCHAR(4000),%s)"/>        <length query="LTRIM(STR(LEN(%s)))"/>        <isnull query="ISNULL(%s,' ')"/>        <delimiter query="+"/>        <limit query="SELECT TOP %d "/>        <limitregexp query="TOP/s+([/d]+)/s+.+?/s+FROM/s+.+?/s+WHERE/s+.+?/s+NOT/s+IN/s+/(SELECT/s+TOP/s+([/d]+)/s+"/>        <limitgroupstart query="2"/>        <limitgroupstop query="1"/>        <limitstring/>        <order query="ORDER BY %s ASC"/>        <count query="COUNT(%s)"/>        <comment query="--" query2="/*"/>        <timedelay query="WAITFOR DELAY '0:0:%d'"/>        <substring query="SUBSTRING((%s),%d,%d)"/>        <case query="SELECT (CASE WHEN (%s) THEN '1' ELSE '0' END)"/>        <inference query="ASCII(SUBSTRING((%s),%d,1)) > %d"/>        <banner query="SELECT @@VERSION"/>        <current_user query="SELECT SUSER_NAME()"/>        <current_db query="SELECT DB_NAME()"/>        <is_dba query="PATINDEX('%sa_role%',SHOW_ROLE())>0" query2="EXISTS(SELECT * FROM master..syslogins,master..sysloginroles WHERE srid=0 and name='%s')"/>        <users>            <inband query="SELECT name FROM master..syslogins"/>            <blind/>        </users>        <passwords>            <inband query="SELECT name,password FROM master..syslogins" condition="name"/>            <blind/>        </passwords>        <privileges/>        <roles>            <inband query="SELECT name,srid FROM master..syslogins,master..sysloginroles" condition="name"/>            <blind/>        </roles>        <dbs>            <inband query="SELECT name FROM master..sysdatabases"/>            <blind/>        </dbs>        <tables>            <inband query="SELECT name FROM %s..sysobjects WHERE type IN ('U')"/>            <blind/>        </tables>        <columns>            <inband query="SELECT %s..syscolumns.name,%s..syscolumns.usertype FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id AND %s..sysobjects.name='%s'" condition="[DB]..syscolumns.name"/>            <blind/>        </columns>        <dump_table>            <inband query="SELECT %s FROM %s..%s"/>            <blind query="SELECT MIN(%s) FROM %s WHERE CONVERT(NVARCHAR(4000),%s)>'%s'" query2="SELECT MAX(%s) FROM %s WHERE CONVERT(NVARCHAR(4000),%s) LIKE '%s'" count="SELECT COUNT(*) FROM %s" count2="SELECT COUNT(*) FROM (SELECT DISTINCT %s FROM %s) AS value_table"/>        </dump_table>        <search_db>            <inband query="SELECT name FROM master..sysdatabases WHERE " condition="name"/>            <blind/>        </search_db>        <search_table>            <inband query="SELECT name FROM %s..sysobjects WHERE type IN ('U') AND " condition="name" condition2="name"/>            <blind/>        </search_table>        <search_column>            <inband query="SELECT %s..sysobjects.name FROM %s..syscolumns,%s..sysobjects WHERE %s..syscolumns.id=%s..sysobjects.id" condition="[DB]..syscolumns.name"/>            <blind/>        </search_column>    </dbms></root>

XML

需求

基本上每个元素结点中都有query属性，比如：

元素结点：<order query="ORDER BY %s ASC"/>

query属性值：ORDER BY %s ASC

现在需要提取出结点名称和与之对应的query属性值

执行结果如下图所示：

分析

<root>是根节点，文档中的所有其他节点都被包含在<root>中。

根节点<root>共有9个<dbms>节点

每个<dbms>节点表示一种数据库，value的值是数据库名称

现在我们直接以MySQL的dbms节点作为分析对象。

<dbms value="MySQL">节点包含了30多个子节点，sqlmap会根据用户在终端中给出的参数进而读取相应的子节点的query值。

比如：

当用户在终端中输入以下命令：python sqlmap.py -u 'http://127.0.0.1/?id=1' --current-user

说明用户想获取网站：http://127.0.0.1上所运行的数据库的当前用户名。

注：<dbms value="MySQL">节点下文用MySQL节点表示，<current_user query="CURRENT_USER()"/>节点用current_user节点表示，以此类推

我们发现在queries.xml文件中，MySQL节点的子节点中有一个节点：current_user节点

节点名称是：current_user

query值：CURRENT_USER()

sqlmap中会通过以下代码来获取的：

if conf.getCurrentUser:　　conf.dumper.currentUser(conf.dbmsHandler.getCurrentUser())

getCurrentUser()函数的代码如下：

def getCurrentUser(self):    infoMsg = "fetching current user"    logger.info(infoMsg)    query = queries[Backend.getIdentifiedDbms()].current_user.query    if not kb.data.currentUser:        kb.data.currentUser = unArrayizeValue(inject.getValue(query))    return kb.data.currentUser

当运行后，通过pycharm调试可以发现，query的值就是等于current_user节点的query属性的值：CURRENT_USER()

这次主要就是对代码

query = queries[Backend.getIdentifiedDbms()].current_user.query

的实现方法进行分析。

其中，有个地方需要特别注意，在节点dbms的部分子节点还含有子节点。

比如：users节点就包含inband和blind2个子节点。解决办法就是使用递归（sqlmap就是这么做的）

想通过代码：queries["MySQL"].current_db.query 来获取制定的query的值的话，需要将每个节点的信息封装到一个类中（XMLNode）

比如：MySQL节点下包含有很多的子节点，所以，XMLNode类中应该有一个容器能够用来保存所有的子节点的信息。

XMLNode类的代码如下：

class XMLNode:    def __init__(self,parent,node):        self._node          = node        self._nodeName      = node.nodeName        self._childrenByName= {}        parentDict  = parent._childrenByName        nodeName    = node.nodeName        if not parentDict.has_key(nodeName):            parentDict[nodeName]        = self        else:            if isinstance(parentDict[nodeName],XMLNode):                parentDict[nodeName]    = [parentDict[nodeName]]            parentDict[nodeName].append(self)        self._value = None        if isinstance(node, xml.dom.minidom.Text):            self._type = "text"            self._value = ""        elif isinstance(node, xml.dom.minidom.Element):            self._type = "node"        elif isinstance(node, xml.dom.minidom.Comment):            self._type = "comment"            self._value = node.nodeValue        for child in node.childNodes:            XMLNode(self,child)    def __getattr__(self, attr):        if self._type in ['text', 'comment']:            return None        if self._node.hasAttribute(attr):            return self._node.getAttribute(attr)        elif self._childrenByName.has_key(attr):            return self._childrenByName[attr]

其中，变量_childrenByName保存着某个节点的子节点信息

if not parentDict.has_key(nodeName):        parentDict[nodeName]        = self

注：parentDict表示当前节点的父节点_childrenByName值

比如：当前正递归到MySQL节点的current_user节点，此时，nodeName=current_user，self表示current_user节点的信息，由于此时

parentDict.has_key(nodeName)的执行结果为False，所以就将current_user节点的信息（self）赋值给parentDict[nodeName]

另外，如果当前节点的父节点已经包含有nodeName属性值的时候

比如：root节点下有9个dbms节点，当递归遍历dbms节点的时候，由于每个dbms节点的nodeName都是等于dbms，所以此时，应该将后续的dbms节点append进去。

当有多一个相同名字的子节点的时候，sqlmap中是使用list来存储的，代码如下所示：

if isinstance(parentDict[nodeName],XMLNode):    parentDict[nodeName]    = [parentDict[nodeName]]parentDict[nodeName].append(self)

递归遍历可以通过以下代码来实现：

for child in node.childNodes:    XMLNode(self,child)

至此，queries["MySQL"].current_db.query的实现基本上差不多了，只是我们想通过.current_db.query来访问的话，我们还需要另外添加一个__getattr__函数

def __getattr__(self, attr):    if self._type in ['text', 'comment']:        return None    if self._node.hasAttribute(attr):        return self._node.getAttribute(attr)    elif self._childrenByName.has_key(attr):        return self._childrenByName[attr]

代码很简单，当要访问的节点类型为文本节点时（comment和text的时候），由于文本节点并没有hasAttribute()方法，所以简单的返回None(详细的可以参考sqlmap源码，我这是精简版的，^_^)

比如：元素节点dbms含有value属性值，dbms节点的子节点基本都有query属性值

当执行queries["MySQL"].current_db.query的时候，由于queries["MySQL"].current_db的类型为XMLNode，所以通过点号（.）来获取query属性值的时候，就会调用__getattr__函数，进而通过self._node.getAttribute(attr)来返回节点的query值。

另外，当执行代码：queries["MySQL"].current_db的时候，由于每个元素节点中，并没有current_db属性，所以就会跳转到

elif self._childrenByName.has_key(attr):     return self._childrenByName[attr]

之前，我们已经通过递归遍历，将各个节点的信息以nodeName为下标，self（当前节点的XMLNode对象）为值保存起来了
具体就是以下代码：

if not parentDict.has_key(nodeName):    parentDict[nodeName]        = selfelse:    if isinstance(parentDict[nodeName],XMLNode):        parentDict[nodeName]    = [parentDict[nodeName]]    parentDict[nodeName].append(self)

完整代码

index.py

from xmlobject.xmltest import XMLFilefrom xmlobject.xmltest import XMLNodequeries = {}def main():    xml = XMLFile(path = "queries.xml")    """Type 1"""    for node in xml.root.dbms:        queries[node.value] = node    print queries["MySQL"].current_db.query    """Type 2"""    for node in xml.root.dbms:        print "*"*20+str(node.value)+"*"*20        for _ in node._childrenByName:            if isinstance(node._childrenByName[_],XMLNode):                nodeName = node._childrenByName[_]._nodeName                query = node._childrenByName[_].query                print "[%s]     %s"%(nodeName,query)if __name__ =="__main__":    main()

index.py

xmltest.py

import xml.dom.minidomclass XMLFile:    def __init__(self,**kwargs):        path     = kwargs.get("path",None)        self._childrenByName = {}        dom = xml.dom.minidom.parse(path)        root = dom.documentElement        for node in dom.childNodes:            childnode = XMLNode(self,node)            if root == node:                self.root = childnodeclass XMLNode:    def __init__(self,parent,node):        self._node          = node        self._nodeName      = node.nodeName        self._childrenByName= {}        parentDict  = parent._childrenByName        nodeName    = node.nodeName        if not parentDict.has_key(nodeName):            parentDict[nodeName]        = self        else:            if isinstance(parentDict[nodeName],XMLNode):                parentDict[nodeName]    = [parentDict[nodeName]]            parentDict[nodeName].append(self)        self._value = None        if isinstance(node, xml.dom.minidom.Text):            self._type = "text"            self._value = ""        elif isinstance(node, xml.dom.minidom.Element):            self._type = "node"        elif isinstance(node, xml.dom.minidom.Comment):            self._type = "comment"            self._value = node.nodeValue        for child in node.childNodes:            XMLNode(self,child)    def __getattr__(self, attr):        if self._type in ['text', 'comment']:            return None        if self._node.hasAttribute(attr):            return self._node.getAttribute(attr)        elif self._childrenByName.has_key(attr):            return self._childrenByName[attr]