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r" c C sD t j| dd�}|dk r@t|�dks.tt|���|jtjd|��S |S )a* Encode the bytes-like object s using Base64 and return a bytes object.
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d��t j | �S )an Decode the Base64 encoded bytes-like object or ASCII string s.
Optional altchars must be a bytes-like object or ASCII string of length 2
which specifies the alternative alphabet used instead of the '+' and '/'
characters.
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s is incorrectly padded.
If validate is False (the default), characters that are neither in the
normal base-64 alphabet nor the alternative alphabet are discarded prior
to the padding check. If validate is True, these non-alphabet characters
in the input result in a binascii.Error.
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c C s t | �S )zrEncode bytes-like object s using the standard Base64 alphabet.
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)r )r r r r! r Z s c C s t | �S )aQ Decode bytes encoded with the standard Base64 alphabet.
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)r )r r r r! r a s s +/s -_c C s t | �jt�S )z�Encode bytes using the URL- and filesystem-safe Base64 alphabet.
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)r r* �_urlsafe_encode_translation)r r r r! r o s c C s t | �} | jt�} t| �S )a� Decode bytes using the URL- and filesystem-safe Base64 alphabet.
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� s c C s4 t | �} |r| j� } tjd| �r*tjd��tj| �S )a� Decode the Base16 encoded bytes-like object or ASCII string s.
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j|�� |r�� t 7 � � S )a� Encode bytes-like object b using Ascii85 and return a bytes object.
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z1Ascii85 encoded byte sequences must end with {!r}r$ Nz!I� urC � !r r; re rt zAscii85 overflowrc zz inside Ascii85 5-tuples rd zy inside Ascii85 5-tuples zNon-Ascii85 digit found: %crj ���r� s uuuurt �u �z �y )r" �endswithr} r �format�
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