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sandbox.cpython-310.pyc
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Useful when the template itself comes from an untrusted source. � N)�formatter_field_name_split)�abc)�deque)�update_wrapper)� Formatter)�EscapeFormatter)�Markup� )� Environment)� SecurityError)�Context)� Undefined�F.)�boundi�� �UNSAFE_FUNCTION_ATTRIBUTES�UNSAFE_METHOD_ATTRIBUTES�gi_frame�gi_code�cr_frame�cr_code�ag_code�ag_frame)�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 �rotate� _mutable_spec�args�returnc G s( t | � }t|�tkrtdt� d���|S )zWA range that can't generate ranges with a length of more than MAX_RANGE items. z@Range too big. The sandbox blocks ranges larger than MAX_RANGE (z).)�range�len� MAX_RANGE� OverflowError)r, �rng� r3 �0/usr/lib/python3/dist-packages/jinja2/sandbox.py� safe_rangeW s ��r5 �fc C s d| _ | S )z�Marks a function or method as unsafe. .. code-block: python @unsafe def delete(self): pass T)�unsafe_callable)r6 r3 r3 r4 �unsafef s r8 �obj�attrc C s� t | tj�r |tv r dS nZt | tj�r |tv s|tv r dS nIt | t�r*|dkr)dS n=t | tjtjtj f�r7dS t | tj �rD|t v rCdS n#t td�rVt | tj �rV|tv rUdS nt td�rgt | tj�rg|tv rgdS |�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� FunctionTyper � MethodTyper �type�CodeType� TracebackType� FrameType� GeneratorType�UNSAFE_GENERATOR_ATTRIBUTES�hasattrr< �UNSAFE_COROUTINE_ATTRIBUTESr= �!UNSAFE_ASYNC_GENERATOR_ATTRIBUTES� startswith)r9 r: r3 r3 r4 �is_internal_attributes s8 � � � �� � rM 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) or the corresponding ABCs would modify it if called. >>> 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, ``False`` is returned. >>> modifies_known_mutable("foo", "upper") False F)r+ r? )r9 r: �typespecr8 r3 r3 r4 �modifies_known_mutable� s �rO c s e Zd ZU dZdZejejejej ej ej ej d�Z ejeejejejgejf f ed< ejejd�Zejeejejgejf f ed< e� Zeje ed< e� Zeje ed< d ejd ejd d f� fd d� Zdejdedejd e fdd�Z dejd e fdd�Z de dedejdejd ejf dd�Z de ded ejd ejfd d �Z!dejd ej"eejf d ej"eje#f fd d!�Z$dejd"ed ej"eje#f fd#d$�Z%dejd"ed e#fd%d&�Z&dejd ej'ejd'ef fd(d)�Z(d*e d+ejd ejd ejd ejf d,d-�Z)� Z*S ).�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**�%�default_binop_table)rQ rR �default_unop_table�intercepted_binops�intercepted_unopsr, �kwargsr- Nc s8 t � j|i |�� t| jd< | j�� | _| j�� | _d S )Nr. ) �super�__init__r5 �globalsrV �copy� binop_tablerW � unop_table)�selfr, rZ �� __class__r3 r4 r\ � s z SandboxedEnvironment.__init__r9 r: �valuec C s |� d�p t||� 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. �_)rL rM �ra r9 r: rd r3 r3 r4 �is_safe_attribute� s z&SandboxedEnvironment.is_safe_attributec C s t |dd�p t |dd� S )z�Check if an object is safely callable. By default callables are considered safe unless decorated with :func:`unsafe`. This also recognizes the Django convention of setting ``func.alters_data = True``. r7 F� alters_data)�getattr)ra r9 r3 r3 r4 �is_safe_callable s �z%SandboxedEnvironment.is_safe_callable�context�operator�left�rightc 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_ )ra rk rl rm rn r3 r3 r4 � call_binop s z SandboxedEnvironment.call_binop�argc 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 )r` )ra rk rl rp r3 r3 r4 � call_unop s z SandboxedEnvironment.call_unop�argumentc C s� z|| W S t tfyV t|t�rTzt|�}W n ty" Y n2w zt||�}W n ty3 Y n!w | �|�}|durA| Y S | �|||�rL| Y S | � ||� Y S Y nw | j ||d�S )z(Subscribe an object from sandboxed code.N�r9 �name) � TypeError� LookupErrorr? �str� Exceptionri �AttributeError�wrap_str_formatrg �unsafe_undefined� undefined)ra r9 rr r: rd �fmtr3 r3 r4 �getitem s. � � ��z SandboxedEnvironment.getitem� attributec C s� zt ||�}W n ty# z|| W Y S ttfy Y nw Y nw | �|�}|dur/|S | �|||�r8|S | �||�S | j||d�S )z�Subscribe an object from sandboxed code and prefer the attribute. The attribute passed *must* be a bytestring. Nrs )ri ry ru rv rz rg r{ r| )ra r9 r rd r} r3 r3 r4 ri : s" �� z SandboxedEnvironment.getattrc C s& | j d|�dt|�j�d�||td�S )z1Return an undefined object for unsafe attributes.zaccess to attribute z of z object is unsafe.)rt r9 �exc)r| rC �__name__r )ra r9 r r3 r3 r4 r{ N s ��z%SandboxedEnvironment.unsafe_undefined.c s� t |tjtjf�r|jdvrdS |j� t � t�sdS t� ��|jdk�t � t�r0t | � j d�}nt | �}|j �dt jdt jdtf� ���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� )�escaper, rZ r- c sL �r |rt d��t| �dkrt dt| �� d���| d }d} ��� | |��S )Nz'format_map() takes no keyword argumentsr z)format_map() takes exactly one argument (z given)r r3 )ru r/ )r, rZ ��f_self� is_format_map�str_type�vformatr3 r4 �wrappers s �z5SandboxedEnvironment.wrap_str_format.<locals>.wrapper)r? r@ rB �BuiltinMethodTyper� �__self__rw rC r �SandboxedEscapeFormatterr� �SandboxedFormatterr� �t�Anyr )ra rd � formatterr� r3 r� r4 rz X s � $ z$SandboxedEnvironment.wrap_str_format� _SandboxedEnvironment__context�_SandboxedEnvironment__objc O s0 | � |�s t|�d���|j|g|�R i |��S )z#Call an object from sandboxed code.z is not safely callable)rj r �call)�_SandboxedEnvironment__selfr� r� r, rZ r3 r3 r4 r� � s zSandboxedEnvironment.call)+r� � __module__� __qualname__�__doc__� sandboxedrl r �sub�mul�truediv�floordiv�pow�modrV r� �Dictrw �Callabler� �__annotations__�pos�negrW � frozensetrX � FrozenSetrY r\ �boolrg rj r ro rq �Unionr r~ ri r{ �Optionalrz r� � __classcell__r3 r3 rb r4 rP � sh ,�(� ���� � �� �$$ ,�����rP c s6 e Zd ZdZdejdedejdef� fdd� Z� Z S )� 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. r9 r: rd r- c s t � �|||�s dS t||� S )NF)r[ rg rO rf rb r3 r4 rg � s z/ImmutableSandboxedEnvironment.is_safe_attribute) r� r� r� r� r� r� rw r� rg r� r3 r3 rb r4 r� � s *r� c sf e Zd Zdedejddf� fdd� Zdedejej dej eejf dej ejef fd d �Z � Z S ) r� �envrZ r- Nc s || _ t� jdi |�� d S )Nr3 )�_envr[ r\ )ra r� rZ rb r3 r4 r\ � s zSandboxedFormatter.__init__� field_namer, c C sR t |�\}}| �|||�}|D ]\}}|r | j�||�}q| j�||�}q||fS )N)r � get_valuer� ri r~ ) ra r� r, rZ �first�restr9 �is_attr�ir3 r3 r4 � get_field� s z SandboxedFormatter.get_field) r� r� r� r r� r� r\ rw �Sequence�Mapping�Tupler� r� r3 r3 rb r4 r� � s � ���r� c @ s e Zd ZdS )r� N)r� r� r� r3 r3 r3 r4 r� � s r� );r� rl r@ �typingr� �_stringr � collectionsr �collections.abcr � ImportError� functoolsr �stringr � markupsafer r � environmentr � exceptionsr �runtimer r �TypeVarr� r� r r0 �setr �Setrw r� r rH rJ rK � MutableSetr� �MutableMapping�MutableSequencer+ r� �Typer� �intr. r5 r8 r� rM rO rP r� r� r� r3 r3 r3 r4 �<module> sh � �� � ���(�+ % d