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bit_length s c C s | j � p d S( Ni ( R ( R ( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyR # s c C s d t d | � d S( Ni s %xi ( R ( t order( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt orderlen' s c C s� | d k s t � | d k r* t j } n t | d � } | d d } x\ t r� | | � } t | � } t | | d d �d } d | k o� | k n rK | SqK Wd S( s Return a random integer k such that 1 <= k < order, uniformly
distributed across that range. Worst case should be a mean of 2 loops at
(2**k)+2.
Note that this function is not declared to be forwards-compatible: we may
change the behavior in future releases. The entropy= argument (which
should get a callable that behaves like os.urandom) can be used to
achieve stability within a given release (for repeatable unit tests), but
should not be used as a long-term-compatible key generation algorithm.
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__module__R* R0 R& ( ( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyR% C s c C su t | � d t | � � } t t j | � d � | d d } d | k oW | k n sq t d | | f � � | S( Ni i i ( R% R R t binasciit hexlifyR ( R) R R t number( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt% randrange_from_seed__overshoot_modulo\ s $1c C s d | >d S( Ni ( ( t numbits( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt lsb_of_onesi s c C sA t t j | d d � d � } | d } | d } | | | f S( Ni i i ( R t matht log( R t bitsR, t extrabits( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt bits_and_bytesm s
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*c C sE t | � } d t d | � d } t j | | j � � } | | S( Ns %0i R ( R RM R7 RN R1 ( RO R RP RQ RR ( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt number_to_string_crop� s c C s t t j | � d � S( Ni ( R R7 R8 ( RR ( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyRH � s c C sL t | � } t | � | k s6 t t | � | f � � t t j | � d � S( Ni ( R R R R R7 R8 ( RR R RP ( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt string_to_number_fixedlen� s *c C s( t | | � } t | | � } | | f S( N( RS ( t rt sR t r_strt s_str( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt sigencode_strings� s c C s t | | | � \ } } | | S( s�
Encode the signature to raw format (:term:`raw encoding`)
It's expected that this function will be used as a `sigencode=` parameter
in :func:`ecdsa.keys.SigningKey.sign` method.
:param int r: first parameter of the signature
:param int s: second parameter of the signature
:param int order: the order of the curve over which the signature was
computed
:return: raw encoding of ECDSA signature
:rtype: bytes
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Encode the signature into the ECDSA-Sig-Value structure using :term:`DER`.
Encodes the signature to the following :term:`ASN.1` structure::
Ecdsa-Sig-Value ::= SEQUENCE {
r INTEGER,
s INTEGER
}
It's expected that this function will be used as a `sigencode=` parameter
in :func:`ecdsa.keys.SigningKey.sign` method.
:param int r: first parameter of the signature
:param int s: second parameter of the signature
:param int order: the order of the curve over which the signature was
computed
:return: DER encoding of ECDSA signature
:rtype: bytes
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t MalformedSignaturec B s e Z d Z RS( sB
Raised by decoding functions when the signature is malformed.
Malformed in this context means that the relevant strings or integers
do not match what a signature over provided curve would create. Either
because the byte strings have incorrect lengths or because the encoded
values are too large.
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Decoder for :term:`raw encoding` of ECDSA signatures.
raw encoding is a simple concatenation of the two integers that comprise
the signature, with each encoded using the same amount of bytes depending
on curve size/order.
It's expected that this function will be used as the `sigdecode=`
parameter to the :func:`ecdsa.keys.VerifyingKey.verify` method.
:param signature: encoded signature
:type signature: bytes like object
:param order: order of the curve over which the signature was computed
:type order: int
:raises MalformedSignature: when the encoding of the signature is invalid
:return: tuple with decoded 'r' and 's' values of signature
:rtype: tuple of ints
i sW Invalid length of signature, expected {0} bytes long, provided string is {1} bytes long( R R R Rb t formatRU ( t signatureR RP RV RW ( ( s? /opt/plesk/python/2.7/lib/python2.7/site-packages/ecdsa/util.pyt sigdecode_string" s c C s� t | � d k s0 t d j t | � � � � n | \ } } t | � } t | � } t | � } t | � | k s� t d j | t | � � � � n t | � | k s� t d j | t | � � � � n t | | � } t | | � } | | f S( s�
Decode the signature from two strings.
First string needs to be a big endian encoding of 'r', second needs to
be a big endian encoding of the 's' parameter of an ECDSA signature.
It's expected that this function will be used as the `sigdecode=`
parameter to the :func:`ecdsa.keys.VerifyingKey.verify` method.
:param list rs_strings: list of two bytes-like objects, each encoding one
parameter of signature
:param int order: order of the curve over which the signature was computed
:raises MalformedSignature: when the encoding of the signature is invalid
:return: tuple with decoded 'r' and 's' values of signature
:rtype: tuple of ints
i s3 Invalid number of strings provided: {0}, expected 2sj Invalid length of first string ('r' parameter), expected {0} bytes long, provided string is {1} bytes longsk Invalid length of second string ('s' parameter), expected {0} bytes long, provided string is {1} bytes long( R Rb Rd R R RU ( t
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Decoder for DER format of ECDSA signatures.
DER format of signature is one that uses the :term:`ASN.1` :term:`DER`
rules to encode it as a sequence of two integers::
Ecdsa-Sig-Value ::= SEQUENCE {
r INTEGER,
s INTEGER
}
It's expected that this function will be used as as the `sigdecode=`
parameter to the :func:`ecdsa.keys.VerifyingKey.verify` method.
:param sig_der: encoded signature
:type sig_der: bytes like object
:param order: order of the curve over which the signature was computed
:type order: int
:raises UnexpectedDER: when the encoding of signature is invalid
:return: tuple with decoded 'r' and 's' values of signature
:rtype: tuple of ints
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