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Editing: sandbox.cpython-39.pyc
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Useful when the template itself comes from an untrusted source. � N)�update_wrapper)� Formatter)�deque)�EscapeFormatter)�Markup� )�abc)�PY2)� range_type)� string_types)� Environment)� SecurityErrori�� > Z func_codeZ func_defaultsZ func_dictZ func_closureZ func_globals> Zim_funcZim_classZim_self�gi_frame�gi_code�cr_frame�cr_code�ag_code�ag_frame�ignorezthe sets module)�module)�UserDict� DictMixin)�UserList)�Set)�add�clear�difference_update�discard�pop�remove�symmetric_difference_update�update)r r �popitem� setdefaultr! )�append�reverse�insert�sort�extendr ) r$ � appendleftr r( � extendleftr �popleftr �rotatec G s$ t | � }t|�tkr tdt ��|S )zWA range that can't generate ranges with a length of more than MAX_RANGE items. zDRange too big. The sandbox blocks ranges larger than MAX_RANGE (%d).)r �len� MAX_RANGE� OverflowError)�args�rng� r2 �0/usr/lib/python3/dist-packages/jinja2/sandbox.py� safe_range� s ��r4 c C s d| _ | S )znMarks a function or method as unsafe. :: @unsafe def delete(self): pass T)�unsafe_callable)�fr2 r2 r3 �unsafe� s r7 c C s� t | tj�r|tv r�dS n�t | tj�r<|tv s6|tv r�dS n�t | t�rT|dkr�dS nzt | tjtjtj f�rndS t | tj �r�|t v r�dS nFt td�r�t | tj �r�|tv r�dS n"t td�r�t | tj�r�|tv r�dS |�d�S )a� Test if the attribute given is an internal python attribute. For example this function returns `True` for the `func_code` attribute of python objects. This is useful if the environment method :meth:`~SandboxedEnvironment.is_safe_attribute` is overridden. >>> from jinja2.sandbox import is_internal_attribute >>> is_internal_attribute(str, "mro") True >>> is_internal_attribute(str, "upper") False T�mro� CoroutineType�AsyncGeneratorType�__)� isinstance�types� FunctionType�UNSAFE_FUNCTION_ATTRIBUTES� MethodType�UNSAFE_METHOD_ATTRIBUTES�type�CodeType� TracebackType� FrameType� GeneratorType�UNSAFE_GENERATOR_ATTRIBUTES�hasattrr9 �UNSAFE_COROUTINE_ATTRIBUTESr: �!UNSAFE_ASYNC_GENERATOR_ATTRIBUTES� startswith)�obj�attrr2 r2 r3 �is_internal_attribute� s. �rN c C s( t D ] \}}t| |�r||v S qdS )a� This function checks if an attribute on a builtin mutable object (list, dict, set or deque) would modify it if called. It also supports the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and with Python 2.6 onwards the abstract base classes `MutableSet`, `MutableMapping`, and `MutableSequence`. >>> modifies_known_mutable({}, "clear") True >>> modifies_known_mutable({}, "keys") False >>> modifies_known_mutable([], "append") True >>> modifies_known_mutable([], "index") False If called with an unsupported object (such as unicode) `False` is returned. >>> modifies_known_mutable("foo", "upper") False F)� _mutable_specr< )rL rM Ztypespecr7 r2 r2 r3 �modifies_known_mutable� s rP c @ s� e Zd ZdZdZejejejej ej ej ej d�Z ejejd�Ze� Ze� Zdd� Zdd� Zd d � Zd d � Zd d� Zdd� Zdd� Zdd� Zdd� Z dd� Z dd� Z dS ) �SandboxedEnvironmenta� The sandboxed environment. It works like the regular environment but tells the compiler to generate sandboxed code. Additionally subclasses of this environment may override the methods that tell the runtime what attributes or functions are safe to access. If the template tries to access insecure code a :exc:`SecurityError` is raised. However also other exceptions may occur during the rendering so the caller has to ensure that all exceptions are caught. T)�+�-�*�/z//z**�%)rR rS c C s dS )a� Called during template compilation with the name of a unary operator to check if it should be intercepted at runtime. If this method returns `True`, :meth:`call_unop` is executed for this unary operator. The default implementation of :meth:`call_unop` will use the :attr:`unop_table` dictionary to perform the operator with the same logic as the builtin one. The following unary operators are interceptable: ``+`` and ``-`` Intercepted calls are always slower than the native operator call, so make sure only to intercept the ones you are interested in. .. versionadded:: 2.6 Fr2 )�self�operatorr2 r2 r3 �intercept_unop s z#SandboxedEnvironment.intercept_unopc O s> t j| g|�R i |�� t| jd< | j�� | _| j�� | _d S )N�range) r �__init__r4 �globals�default_binop_table�copy� binop_table�default_unop_table� unop_table)rW r0 �kwargsr2 r2 r3 r[ - s z SandboxedEnvironment.__init__c C s |� d�pt||� S )aY The sandboxed environment will call this method to check if the attribute of an object is safe to access. Per default all attributes starting with an underscore are considered private as well as the special attributes of internal python objects as returned by the :func:`is_internal_attribute` function. �_)rK rN �rW rL rM �valuer2 r2 r3 �is_safe_attribute3 s z&SandboxedEnvironment.is_safe_attributec C s t |dd�pt |dd� S )a Check if an object is safely callable. Per default a function is considered safe unless the `unsafe_callable` attribute exists and is True. Override this method to alter the behavior, but this won't affect the `unsafe` decorator from this module. r5 FZ alters_data)�getattr)rW rL r2 r2 r3 �is_safe_callable< s �z%SandboxedEnvironment.is_safe_callablec C s | j | ||�S )z�For intercepted binary operator calls (:meth:`intercepted_binops`) this function is executed instead of the builtin operator. This can be used to fine tune the behavior of certain operators. .. versionadded:: 2.6 )r_ )rW �contextrX �left�rightr2 r2 r3 � call_binopF s z SandboxedEnvironment.call_binopc C s | j | |�S )z�For intercepted unary operator calls (:meth:`intercepted_unops`) this function is executed instead of the builtin operator. This can be used to fine tune the behavior of certain operators. .. versionadded:: 2.6 )ra )rW ri rX �argr2 r2 r3 � call_unopO s z SandboxedEnvironment.call_unopc C s� z || W S t tfy� t|t�r�z t|�}W n tyD Y nd0 zt||�}W n tyf Y nB0 | �|�}|dur�| Y S | � |||�r�| Y S | � ||� Y S Y n0 | j ||d�S )z(Subscribe an object from sandboxed code.N�rL �name) � TypeError� LookupErrorr< r �str� Exceptionrg �AttributeError�wrap_str_formatrf �unsafe_undefined� undefined)rW rL ZargumentrM re �fmtr2 r2 r3 �getitemX s& z SandboxedEnvironment.getitemc C s� zt ||�}W n8 tyF z|| W Y S ttfy@ Y n0 Y n60 | �|�}|dur^|S | �|||�rp|S | �||�S | j||d�S )z�Subscribe an object from sandboxed code and prefer the attribute. The attribute passed *must* be a bytestring. Nro )rg ru rq rr rv rf rw rx )rW rL � attributere ry r2 r2 r3 rg p s z SandboxedEnvironment.getattrc C s | j d||jjf ||td�S )z1Return an undefined object for unsafe attributes.z.access to attribute %r of %r object is unsafe.)rp rL �exc)rx � __class__�__name__r )rW rL r{ r2 r2 r3 rw � s ��z%SandboxedEnvironment.unsafe_undefinedc s� t |tjtjf�r |jdvr dS |j� t � t�s4dS t� ��|jdk�t � t�r`t | � j d�}nt | �}|j �� ���fdd�}t ||�S )a If the given value is a ``str.format`` or ``str.format_map`` method, return a new function than handles sandboxing. This is done at access rather than in :meth:`call`, so that calls made without ``call`` are also sandboxed. )�format� format_mapNr� )�escapec sH �r8|rt d��t| �dkr,t dt| � ��| d }d} ��� | |��S )Nz'format_map() takes no keyword argumentsr z2format_map() takes exactly one argument ({} given)r r2 )rq r- )r0 rb �Zf_selfZ is_format_mapZstr_type�vformatr2 r3 �wrapper� s ��z5SandboxedEnvironment.wrap_str_format.<locals>.wrapper)r< r= r@ �BuiltinMethodTyper~ �__self__rs rB r �SandboxedEscapeFormatterr� �SandboxedFormatterr� r )rW re Z formatterr� r2 r� r3 rv � s" �� z$SandboxedEnvironment.wrap_str_formatc O s0 | � |�std|f ��|j|g|�R i |��S )z#Call an object from sandboxed code.z%r is not safely callable)rh r �call)Z_SandboxedEnvironment__selfZ _SandboxedEnvironment__contextZ_SandboxedEnvironment__objr0 rb r2 r2 r3 r� � s zSandboxedEnvironment.callN) r~ � __module__� __qualname__�__doc__Z sandboxedrX r �sub�mul�truediv�floordiv�pow�modr] �pos�negr` � frozensetZintercepted_binopsZintercepted_unopsrY r[ rf rh rl rn rz rg rw rv r� r2 r2 r2 r3 rQ � s0 � ,rQ c @ s e Zd ZdZdd� ZdS )� ImmutableSandboxedEnvironmentz�Works exactly like the regular `SandboxedEnvironment` but does not permit modifications on the builtin mutable objects `list`, `set`, and `dict` by using the :func:`modifies_known_mutable` function. c C s t �| |||�sdS t||� S )NF)rQ rf rP rd r2 r2 r3 rf � s z/ImmutableSandboxedEnvironment.is_safe_attributeN)r~ r� r� r� rf r2 r2 r2 r3 r� � s r� )�formatter_field_name_splitc C s | � � S �N)Z_formatter_field_name_split)� field_namer2 r2 r3 r� � s r� c @ s e Zd Zdd� Zdd� ZdS )�SandboxedFormatterMixinc C s || _ d S r� )�_env�rW �envr2 r2 r3 r[ � s z SandboxedFormatterMixin.__init__c C sR t |�\}}| �|||�}|D ]*\}}|r:| j�||�}q | j�||�}q ||fS r� )r� Z get_valuer� rg rz ) rW r� r0 rb �first�restrL Zis_attr�ir2 r2 r3 � get_field� s z!SandboxedFormatterMixin.get_fieldN)r~ r� r� r[ r� r2 r2 r2 r3 r� � s r� c @ s e Zd Zdd� ZdS )r� c C s t �| |� t�| � d S r� )r� r[ r r� r2 r2 r3 r[ � s zSandboxedFormatter.__init__N�r~ r� r� r[ r2 r2 r2 r3 r� � s r� c @ s e Zd Zdd� ZdS )r� c C s t �| |� t�| |� d S r� )r� r[ r )rW r� r� r2 r2 r3 r[ � s z!SandboxedEscapeFormatter.__init__Nr� r2 r2 r2 r3 r� � s r� )=r� rX r= �warnings� functoolsr �stringr �collections.abcr � ImportError� collectionsZ markupsafer r Z_compatr r r r Z environmentr � exceptionsr r. r? �setrA rG rI rJ �filterwarnings�DeprecationWarningr~ Z_mutable_set_types�dictZ_mutable_mapping_types�listZ_mutable_sequence_typesr r r Zsetsr � MutableSet�MutableMapping�MutableSequencer� rO r4 r7 rN rP rQ r� Z_stringr� �objectr� r� r� r2 r2 r2 r3 �<module> s� � �� � ����+ % g
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