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a c�h�{ � @ s� d dl Z d dlmZmZmZmZ d dlmZmZ g d�Z ddd�Z G dd � d e �Z G d d � d e �Z G d d � d e �ZG dd� de �ZG dd� de �ZG dd� de �ZG dd� de �ZG dd� de �ZG dd� de �ZdS )� N)� byte_string�b�bchr�bord)� long_to_bytes� bytes_to_long)� DerObject� DerInteger�DerOctetString�DerNull� DerSequence� DerObjectId� DerBitString�DerSetOfFc C s4 d}z | | }W n t y$ Y dS 0 | p2| dkS )Nr F)� TypeError)�x�only_non_negative�test� r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/Crypto/Util/asn1.py� _is_number! s r c @ s@ e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dS )� BytesIO_EOFzeThis class differs from BytesIO in that a ValueError exception is raised whenever EOF is reached.c C s || _ d| _d | _d S �Nr )�_buffer�_index� _bookmark)�selfZ initial_bytesr r r �__init__. s zBytesIO_EOF.__init__c C s | j | _d S �N)r r �r r r r � set_bookmark3 s zBytesIO_EOF.set_bookmarkc C s | j d usJ �| j| j | j� S r )r r r r r r r �data_since_bookmark6 s z BytesIO_EOF.data_since_bookmarkc C s t | j�| j S r )�lenr r r r r r �remaining_data: s zBytesIO_EOF.remaining_datac C sH | j | }|t| j�kr.td|t| j�f ��| j| j |� }|| _ |S )Nz@Not enough data for DER decoding: expected %d bytes and found %d)r r" r � ValueError)r �lengthZ new_index�resultr r r �read= s zBytesIO_EOF.readc C s t | �d�d �S )N� r )r r' r r r r � read_byteF s zBytesIO_EOF.read_byteN) �__name__� __module__� __qualname__�__doc__r r r! r# r' r) r r r r r * s r c @ sP e Zd ZdZddd�Zdd� Zed d � �Zd d � Zd d� Z ddd�Z dd� Z dS )r zpBase class for defining a single DER object. This class should never be directly instantiated. N� Fc C s� |du rd| _ dS | �|�}|| _d||fvr6td��|durZdd| B | �|�B | _ dS |dur�d| �|�B | _ d| |B | _dS d| |B | _ dS )a� Initialize the DER object according to a specific ASN.1 type. :Parameters: asn1Id : integer The universal DER tag number for this object (e.g. 0x10 for a SEQUENCE). If None, the tag is not known yet. payload : byte string The initial payload of the object (that it, the content octets). If not specified, the payload is empty. implicit : integer The IMPLICIT tag number to use for the encoded object. It overrides the universal tag *asn1Id*. constructed : bool True when the ASN.1 type is *constructed*. False when it is *primitive*. explicit : integer The EXPLICIT tag number to use for the encoded object. Nz1Explicit and implicit tags are mutually exclusive� � � )� _tag_octet� _convertTag�payloadr$ �_inner_tag_octet)r Zasn1Idr4 �implicitZ constructed�explicitr r r r P s zDerObject.__init__c C sJ t |�s t|�dkr t|d �}t |�r>d| kr<dk sFn td��|S )zvCheck if *tag* is a real DER tag. Convert it from a character to number if necessary. r( r � z Wrong DER tag)r r" r r$ )r �tagr r r r3 � s zDerObject._convertTagc C s, | dkr$t | �}tt|�d �| S t| �S )zXBuild length octets according to BER/DER definite form. � r/ )r r r" )r% �encodingr r r �_definite_form� s zDerObject._definite_formc C sL | j }t| d�r0t| j�| �t| j �� | j }t| j�| �t|�� | S )z?Return this DER element, fully encoded as a binary byte string.r5 )r4 �hasattrr r5 r< r" r2 )r Zoutput_payloadr r r �encode� s �� ��zDerObject.encodec C sR |� � }|dkrN|�|d@ �}t|d �dkr6td��t|�}|dkrNtd��|S )z%Decode DER length octets from a file.r: r z$Invalid DER: length has leading zeroz5Invalid DER: length in long form but smaller than 128)r) r' r r$ r )r �sr% Zencoded_lengthr r r � _decodeLen� s zDerObject._decodeLenc C s< t |�std��t|�}| �||� |�� dkr8td��| S )a Decode a complete DER element, and re-initializes this object with it. Args: der_encoded (byte string): A complete DER element. Raises: ValueError: in case of parsing errors. zInput is not a byte stringr �-Unexpected extra data after the DER structure)r r$ r �_decodeFromStreamr# )r � der_encoded�strictr? r r r �decode� s zDerObject.decodec C s� |� � }| jdur&|| jkr,td��n|| _| �|�}|�|�| _t| d�r�t| j�}|� � }|| jkrptd��| �|�}|�|�| _|� � dkr�td��dS )z*Decode a complete DER element from a file.NzUnexpected DER tagr5 zUnexpected internal DER tagr rA ) r) r2 r$ r@ r' r4 r= r r5 r# )r r? rD ZidOctetr% �pZ inner_octetr r r rB � s zDerObject._decodeFromStream)Nr. NFN)F) r* r+ r, r- r r3 � staticmethodr< r> r@ rE rB r r r r r J s � ? r c @ s4 e Zd ZdZd dd�Zdd� Zdd d �Zd d � ZdS )r a� Class to model a DER INTEGER. An example of encoding is:: >>> from Crypto.Util.asn1 import DerInteger >>> from binascii import hexlify, unhexlify >>> int_der = DerInteger(9) >>> print hexlify(int_der.encode()) which will show ``020109``, the DER encoding of 9. And for decoding:: >>> s = unhexlify(b'020109') >>> try: >>> int_der = DerInteger() >>> int_der.decode(s) >>> print int_der.value >>> except ValueError: >>> print "Not a valid DER INTEGER" the output will be ``9``. :ivar value: The integer value :vartype value: integer r Nc C s t �| dd|d|� || _dS )aU Initialize the DER object as an INTEGER. :Parameters: value : integer The value of the integer. implicit : integer The IMPLICIT tag to use for the encoded object. It overrides the universal tag for INTEGER (2). � r. FN�r r �value�r rJ r6 r7 r r r r s �zDerInteger.__init__c C sz | j }d| _tt|d@ ��| j | _d| kr8dkrLn ntd�| j | _d| kr`dkrfqp nqp|dL }q t�| �S )zIReturn the DER INTEGER, fully encoded as a binary string.r. � r/ r i����� )rJ r4 r �intr r> )r �numberr r r r> % s zDerInteger.encodeFc C s t j| ||d�S )a! Decode a complete DER INTEGER DER, and re-initializes this object with it. Args: der_encoded (byte string): A complete INTEGER DER element. Raises: ValueError: in case of parsing errors. �rD �r rE �r rC rD r r r rE 4 s zDerInteger.decodec C s� t �| ||� |r\t| j�dkr(td��t| j�dkr\t�d| jdd� �d dk r\td��d| _d}| jD ],}| jd 9 _| jt|�7 _|d K }ql| jr�t| jd �d@ r�| j|8 _dS ) z*Decode a complete DER INTEGER from a file.r z/Invalid encoding for DER INTEGER: empty payloadrH z>HNr/ z.Invalid encoding for DER INTEGER: leading zeror( � rM ) r rB r" r4 r$ �struct�unpackrJ r )r r? rD �bits�ir r r rB A s , z DerInteger._decodeFromStream)r NN)F�r* r+ r, r- r r> rE rB r r r r r � s r c @ s� e Zd ZdZd#dd�Zdd� Zdd� Zd d � Zd d � Zd d� Z dd� Z dd� Z dd� Z dd� Z d$dd�Zd%dd�Zd d � Zd&d d �Zd!d"� ZdS )'r a� Class to model a DER SEQUENCE. This object behaves like a dynamic Python sequence. Sub-elements that are INTEGERs behave like Python integers. Any other sub-element is a binary string encoded as a complete DER sub-element (TLV). An example of encoding is: >>> from Crypto.Util.asn1 import DerSequence, DerInteger >>> from binascii import hexlify, unhexlify >>> obj_der = unhexlify('070102') >>> seq_der = DerSequence([4]) >>> seq_der.append(9) >>> seq_der.append(obj_der.encode()) >>> print hexlify(seq_der.encode()) which will show ``3009020104020109070102``, the DER encoding of the sequence containing ``4``, ``9``, and the object with payload ``02``. For decoding: >>> s = unhexlify(b'3009020104020109070102') >>> try: >>> seq_der = DerSequence() >>> seq_der.decode(s) >>> print len(seq_der) >>> print seq_der[0] >>> print seq_der[:] >>> except ValueError: >>> print "Not a valid DER SEQUENCE" the output will be:: 3 4 [4, 9, b''] Nc C s, t �| dd|d� |du r"g | _n|| _dS )a� Initialize the DER object as a SEQUENCE. :Parameters: startSeq : Python sequence A sequence whose element are either integers or other DER objects. implicit : integer The IMPLICIT tag to use for the encoded object. It overrides the universal tag for SEQUENCE (16). � r. TN)r r �_seq)r ZstartSeqr6 r r r r � s zDerSequence.__init__c C s | j |= d S r �rZ �r �nr r r � __delitem__� s zDerSequence.__delitem__c C s | j | S r r[ r\ r r r � __getitem__� s zDerSequence.__getitem__c C s || j |< d S r r[ )r �keyrJ r r r � __setitem__� s zDerSequence.__setitem__c C s || j ||�< d S r r[ )r rW �j�sequencer r r � __setslice__� s zDerSequence.__setslice__c C s | j ||�= d S r r[ �r rW rb r r r � __delslice__� s zDerSequence.__delslice__c C s | j td|�td|�� S r )rZ �maxre r r r � __getslice__� s zDerSequence.__getslice__c C s t | j�S r �r" rZ r r r r �__len__� s zDerSequence.__len__c C s | j �|� | S r �rZ �append�r �itemr r r �__iadd__� s zDerSequence.__iadd__c C s | j �|� | S r rk rm r r r rl � s zDerSequence.appendTc s � fdd�| j D �}t|�S )z�Return the number of items in this sequence that are integers. Args: only_non_negative (boolean): If ``True``, negative integers are not counted in. c s g | ]}t |� �r|�qS r )r ��.0r �r r r � <listcomp>� r. z'DerSequence.hasInts.<locals>.<listcomp>)rZ r" )r r �itemsr rr r �hasInts� s zDerSequence.hasIntsc C s | j o| �|�t| j �kS )a� Return ``True`` if all items in this sequence are integers or non-negative integers. This function returns False is the sequence is empty, or at least one member is not an integer. Args: only_non_negative (boolean): If ``True``, the presence of negative integers causes the method to return ``False``.)rZ ru r" )r r r r r � hasOnlyInts� s zDerSequence.hasOnlyIntsc C sf d| _ | jD ]N}t|�r(| j |7 _ q t|�rH| j t|��� 7 _ q | j |�� 7 _ q t�| �S )z�Return this DER SEQUENCE, fully encoded as a binary string. Raises: ValueError: if some elements in the sequence are neither integers nor byte strings. r. )r4 rZ r r r r> r rm r r r r> � s zDerSequence.encodeFc C s. || _ tj| ||d�}|r*| �� s*td��|S )a9 Decode a complete DER SEQUENCE, and re-initializes this object with it. Args: der_encoded (byte string): A complete SEQUENCE DER element. nr_elements (None or integer or list of integers): The number of members the SEQUENCE can have only_ints_expected (boolean): Whether the SEQUENCE is expected to contain only integers. strict (boolean): Whether decoding must check for strict DER compliancy. Raises: ValueError: in case of parsing errors. DER INTEGERs are decoded into Python integers. Any other DER element is not decoded. Its validity is not checked. rP z Some members are not INTEGERs)� _nr_elementsr rE rv r$ )r rC rD Z nr_elementsZonly_ints_expectedr& r r r rE � s zDerSequence.decodec C s� g | _ t�| ||� t| j�}|�� dkr�|�� t� }|�||� |jdkr`| j �|� � � q t � }|� � }|j ||d� | j �|j � q d}| j dur�zt| j �| j v }W n" ty� t| j �| j k}Y n0 |s�tdt| j � ��dS )z+Decode a complete DER SEQUENCE from a file.r rH rP TNz1Unexpected number of members (%d) in the sequence)rZ r rB r r4 r# r r2 rl r! r rE rJ rw r" r r$ )r r? rD rF �der�derInt�data�okr r r rB � s. �z DerSequence._decodeFromStream)NN)T)T)FNF)r* r+ r, r- r r^ r_ ra rd rf rh rj ro rl ru rv r> rE rB r r r r r X s * r c @ s e Zd ZdZddd�ZdS )r a� Class to model a DER OCTET STRING. An example of encoding is: >>> from Crypto.Util.asn1 import DerOctetString >>> from binascii import hexlify, unhexlify >>> os_der = DerOctetString(b'\xaa') >>> os_der.payload += b'\xbb' >>> print hexlify(os_der.encode()) which will show ``0402aabb``, the DER encoding for the byte string ``b'\xAA\xBB'``. For decoding: >>> s = unhexlify(b'0402aabb') >>> try: >>> os_der = DerOctetString() >>> os_der.decode(s) >>> print hexlify(os_der.payload) >>> except ValueError: >>> print "Not a valid DER OCTET STRING" the output will be ``aabb``. :ivar payload: The content of the string :vartype payload: byte string r. Nc C s t �| d||d� dS )ah Initialize the DER object as an OCTET STRING. :Parameters: value : byte string The initial payload of the object. If not specified, the payload is empty. implicit : integer The IMPLICIT tag to use for the encoded object. It overrides the universal tag for OCTET STRING (4). � FN�r r )r rJ r6 r r r r A s zDerOctetString.__init__)r. N�r* r+ r, r- r r r r r r # s r c @ s e Zd ZdZdd� ZdS )r z"Class to model a DER NULL element.c C s t �| dddd� dS )z$Initialize the DER object as a NULL.� r. NFr} r r r r r S s zDerNull.__init__Nr~ r r r r r P s r c @ s4 e Zd ZdZd dd�Zdd� Zdd d �Zd d � ZdS )r a( Class to model a DER OBJECT ID. An example of encoding is: >>> from Crypto.Util.asn1 import DerObjectId >>> from binascii import hexlify, unhexlify >>> oid_der = DerObjectId("1.2") >>> oid_der.value += ".840.113549.1.1.1" >>> print hexlify(oid_der.encode()) which will show ``06092a864886f70d010101``, the DER encoding for the RSA Object Identifier ``1.2.840.113549.1.1.1``. For decoding: >>> s = unhexlify(b'06092a864886f70d010101') >>> try: >>> oid_der = DerObjectId() >>> oid_der.decode(s) >>> print oid_der.value >>> except ValueError: >>> print "Not a valid DER OBJECT ID" the output will be ``1.2.840.113549.1.1.1``. :ivar value: The Object ID (OID), a dot separated list of integers :vartype value: string � Nc C s t �| dd|d|� || _dS )a� Initialize the DER object as an OBJECT ID. :Parameters: value : string The initial Object Identifier (e.g. "1.2.0.0.6.2"). implicit : integer The IMPLICIT tag to use for the encoded object. It overrides the universal tag for OBJECT ID (6). explicit : integer The EXPLICIT tag to use for the encoded object. � r. FNrI rK r r r r w s zDerObjectId.__init__c C s� dd� | j �d�D �}t|�dk r*td��td|d |d �| _|dd � D ]h}|dkrddg}n6g }|r�|�d|d @ d B � |d L }qh|d d M < | jd�dd� |D ��7 _qPt� | �S )zCReturn the DER OBJECT ID, fully encoded as a binary string.c S s g | ] }t |��qS r )rN rp r r r rs � r. z&DerObjectId.encode.<locals>.<listcomp>�.rH z$Not a valid Object Identifier string�( r r( Nr: r/ � ���r. c S s g | ] }t |��qS r )r rp r r r rs � r. ) rJ �splitr" r$ r r4 �insert�joinr r> )r �comps�v�encr r r r> � s zDerObjectId.encodeFc C s t �| ||�S )ab Decode a complete DER OBJECT ID, and re-initializes this object with it. Args: der_encoded (byte string): A complete DER OBJECT ID. strict (boolean): Whether decoding must check for strict DER compliancy. Raises: ValueError: in case of parsing errors. rQ rR r r r rE � s zDerObjectId.decodec C s� t �| ||� t| j�}dd� t|�� d�D �}d}|�� rp|�� }|d |d@ }|d@ s4|�t|�� d}q4d� |�| _ dS ) z,Decode a complete DER OBJECT ID from a file.c S s g | ] }t |��qS r )�strrp r r r rs � r. z1DerObjectId._decodeFromStream.<locals>.<listcomp>r� r r/ r: r� N) r rB r r4 �divmodr) r# rl r� r� rJ )r r? rD rF r� r� �cr r r rB � s z DerObjectId._decodeFromStream)r� NN)FrX r r r r r Y s r c @ s4 e Zd ZdZd dd�Zdd� Zdd d �Zd d � ZdS )r a� Class to model a DER BIT STRING. An example of encoding is: >>> from Crypto.Util.asn1 import DerBitString >>> from binascii import hexlify, unhexlify >>> bs_der = DerBitString(b'\xaa') >>> bs_der.value += b'\xbb' >>> print hexlify(bs_der.encode()) which will show ``040300aabb``, the DER encoding for the bit string ``b'\xAA\xBB'``. For decoding: >>> s = unhexlify(b'040300aabb') >>> try: >>> bs_der = DerBitString() >>> bs_der.decode(s) >>> print hexlify(bs_der.value) >>> except ValueError: >>> print "Not a valid DER BIT STRING" the output will be ``aabb``. :ivar value: The content of the string :vartype value: byte string r. Nc C s4 t �| dd|d|� t|t �r*|�� | _n|| _dS )a� Initialize the DER object as a BIT STRING. :Parameters: value : byte string or DER object The initial, packed bit string. If not specified, the bit string is empty. implicit : integer The IMPLICIT tag to use for the encoded object. It overrides the universal tag for OCTET STRING (3). explicit : integer The EXPLICIT tag to use for the encoded object. � r. FN)r r � isinstancer> rJ rK r r r r � s zDerBitString.__init__c C s d| j | _t�| �S )zDReturn the DER BIT STRING, fully encoded as a binary string.� )rJ r4 r r> r r r r r> � s zDerBitString.encodeFc C s t �| ||�S )aT Decode a complete DER BIT STRING, and re-initializes this object with it. Args: der_encoded (byte string): a complete DER BIT STRING. strict (boolean): Whether decoding must check for strict DER compliancy. Raises: ValueError: in case of parsing errors. rQ rR r r r rE � s zDerBitString.decodec C sN t �| ||� | jr.t| jd �dkr.td��d| _| jrJ| jdd� | _dS )z1Decode a complete DER BIT STRING DER from a file.r zNot a valid BIT STRINGr. r( N)r rB r4 r r$ rJ )r r? rD r r r rB s z DerBitString._decodeFromStream)r. NN)FrX r r r r r � s r c @ sT e Zd ZdZddd�Zdd� Zdd� Zd d � Zd d � Zddd�Z dd� Z dd� Z dS )r a� Class to model a DER SET OF. An example of encoding is: >>> from Crypto.Util.asn1 import DerBitString >>> from binascii import hexlify, unhexlify >>> so_der = DerSetOf([4,5]) >>> so_der.add(6) >>> print hexlify(so_der.encode()) which will show ``3109020104020105020106``, the DER encoding of a SET OF with items 4,5, and 6. For decoding: >>> s = unhexlify(b'3109020104020105020106') >>> try: >>> so_der = DerSetOf() >>> so_der.decode(s) >>> print [x for x in so_der] >>> except ValueError: >>> print "Not a valid DER SET OF" the output will be ``[4, 5, 6]``. Nc C s: t �| dd|d� g | _d| _|r6|D ]}| �|� q&dS )a9 Initialize the DER object as a SET OF. :Parameters: startSet : container The initial set of integers or DER encoded objects. implicit : integer The IMPLICIT tag to use for the encoded object. It overrides the universal tag for SET OF (17). � r. TN)r r rZ � _elemOctet�add)r ZstartSetr6 �er r r r 2 s zDerSetOf.__init__c C s | j | S r r[ r\ r r r r_ G s zDerSetOf.__getitem__c C s t | j�S r )�iterrZ r r r r �__iter__J s zDerSetOf.__iter__c C s t | j�S r ri r r r r rj M s zDerSetOf.__len__c C sh t |�rd}n t|t�r | j}n t|d �}| j|krN| jdurHtd��|| _|| jvrd| j�|� dS )z�Add an element to the set. Args: elem (byte string or integer): An element of the same type of objects already in the set. It can be an integer or a DER encoded object. rH r Nz&New element does not belong to the set) r r� r r2 r r� r$ rZ rl )r �elem�eor r r r� P s z DerSetOf.addFc C s t �| ||�S )a� Decode a complete SET OF DER element, and re-initializes this object with it. DER INTEGERs are decoded into Python integers. Any other DER element is left undecoded; its validity is not checked. Args: der_encoded (byte string): a complete DER BIT SET OF. strict (boolean): Whether decoding must check for strict DER compliancy. Raises: ValueError: in case of parsing errors. rQ rR r r r rE h s zDerSetOf.decodec C s� g | _ t�| ||� t| j�}d}|�� dkr�|�� t� }|�||� |dk rX|j}n||jkrjtd��|dkr�| j � |� � � q"t � }|� |� � |� | j � |j � q"dS )z)Decode a complete DER SET OF from a file.r� r z)Not all elements are of the same DER typerH N)rZ r rB r r4 r# r r2 r$ rl r! r rE rJ )r r? rD rF Z setIdOctetrx ry r r r rB z s" zDerSetOf._decodeFromStreamc C sf g }| j D ]<}t|�r$t|��� }nt|t�r8|�� }n|}|�|� q |�� d�|�| _ t�| �S )zRReturn this SET OF DER element, fully encoded as a binary string. r. ) rZ r r r> r� r rl �sortr� r4 )r �orderedrn Zbysr r r r> � s zDerSetOf.encode)NN)F) r* r+ r, r- r r_ r� rj r� rE rB r> r r r r r s !r )F)rT ZCrypto.Util.py3compatr r r r ZCrypto.Util.numberr r �__all__r �objectr r r r r r r r r r r r r �<module> s 0_ L- dZ
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