o Cjig>@sddlmZddlmZddlmZmZmZmZddl m Z m Z m Z ddl mZmZgdZdZd ZGd d d eZGd d d ZedejejddZedejejddZedejejddZedejej ddZ!edej"ej#ddZ$edej%ej&ddZ'ed ej(ej)d!d"Z*ed#ej+ej,d$d%Z-ed&ej.ej/d'd(Z0ed)ej1ej2d*d+Z3ed,ej4ej5d-d.Z6ed/ej7ej8d0d1Z9ed2ej:ej;d3d4Zd6d7Z?ed8ej@ejAd9d:ZBed;ejCejDdejFejGd?d@ZHedAejIejJdBdCZKedDejLejMdEdFZNedGejOejPdHdIZQedJejRejSdKdLZTedMejUejVdNdOZWedPejXejYdQdRZZedSej[ej\dTdUZ]edVej^ej_dWZ`edXejaejbdYZce$e'e*e-e0e3e6er;rr?r@encode_integerencode_sequencer+encode_octet_stringr abr<to_bytesr=cofactorappend) rGencodingpoint_encodingcurve_pversionfield_idr;baser= seq_elementsr\r5r5r6to_der\sN        z Curve.to_dercCst|||dS)a Serialise the curve parameters to the :term:`PEM` format. :param str encoding: the format to save the curve parameters in. Default is ``named_curve``, with fallback being the ``explicit`` if the OID is not set for the curve. :param str point_encoding: the point encoding of the generator when explicit curve encoding is used. Ignored for ``named_curve`` format. :return: PEM encoded ECParameters structure :rtype: str z EC PARAMETERS)rtopemre)rGr^r_r5r5r6to_pems z Curve.to_pemcCs|std}tdd|Dstdt|}t|s7d|vr%tdt|\}}|r3tdt|Sd|vr@td t |\}}|rNtd t |\}}|d kr^td t |\}}t |\}}t |\} }t |\} }d } |rt |\} } t|\} }| t krt d| tkrt d| t |\}}|rtdt |\}}t |\}}t|}t|}t|||| }tjj|| d| dd}td||d }tD] }||kr|Sq|S)aDecode the curve parameters from DER file. :param data: the binary string to decode the parameters from :type data: :term:`bytes-like object` :param valid_encodings: set of names of allowed encodings, by default all (set by passing ``None``), supported ones are ``named_curve`` and ``explicit`` :type valid_encodings: :term:`set-like object` rTcss|]}|dvVqdS)rTNr5).0ir5r5r6 sz!Curve.from_der..z1Only named_curve and explicit encodings supportedrRz(named_curve curve parameters not allowedzUnexpected data after OIDrSz%explicit curve parameters not allowedz,Unexpected data after ECParameters structurerz!Unknown parameter encoding formatNz#Characteristic 2 curves unsupportedzUnknown field type: {0}z:Unexpected data after ECParameters.fieldID.Prime-p element)rQ compressedhybridT)valid_encodingsr=r<unknown)setallrUr r is_sequence UnexpectedDER remove_objectrremove_sequenceremove_integerremove_octet_stringr,rr+formatr rCurveFp PointJacobi from_bytesrr)datarmrDemptyseqrarestrbr; base_bytesr=r\_ field_typeprime curve_a_bytes curve_b_bytescurve_acurve_bcurve_fprc tmp_curverir5r5r6from_ders~     zCurve.from_dercCsLts t|tr |}|d}|dkrtd|t||d|S)amDecode the curve parameters from PEM file. :param str string: the text string to decode the parameters from :param valid_encodings: set of names of allowed encodings, by default all (set by passing ``None``), supported ones are ``named_curve`` and ``explicit`` :type valid_encodings: :term:`set-like object` s-----BEGIN EC PARAMETERS-----z"EC PARAMETERS PEM header not foundN) rr>strencodefindrrrrunpem)clsstringrmec_param_indexr5r5r6from_pems   zCurve.from_pemrI)NrQ) r2r3r4rHrMrNrPrerg staticmethodr classmethodrr5r5r5r6r9s   < [rr)rr secp112r1r)rrrrr7 secp112r2r)rrrr secp128r1r)rrrrr8 secp160r1r)rr/r0r1rrr prime192v1r)rrrr! secp224r1r)rr/r0r1rrr7 prime256v1r)rrrr" secp384r1r)rrrr# secp521r1r)rrrr secp256k1r) rr$rrr/r8rrrbrainpoolP160r1r) rrrrrr/r8rrr/brainpoolP160t1r) rrrrrr/r8rrrbrainpoolP192r1r ) rrrrrr/r8rrbrainpoolP192t1r!) rrrrrr/r8rrbrainpoolP224r1r") rrrrrr/r8rrrbrainpoolP224t1r#) rrrrrr/r8rrr7brainpoolP256r1r$) rrrrrr/r8rrr8brainpoolP256t1r%) rrrrrr/r8rr brainpoolP320r1r&) rrrrrr/r8rrrbrainpoolP320t1r') rrrrrr/r8rr brainpoolP384r1r() rrrrrr/r8rr brainpoolP384t1r)) rrrrrr/r8rr brainpoolP512r1r*) rrrrrr/r8rrbrainpoolP512t1r-)rrepr.)rrrqcCs6tD] }|j|kr |Sqtd|ddtDf)a9Select a curve based on its OID :param tuple[int,...] oid_curve: ASN.1 Object Identifier of the curve to return, like ``(1, 2, 840, 10045, 3, 1, 7)`` for ``NIST256p``. :raises UnknownCurveError: When the oid doesn't match any of the supported curves :rtype: ~ecdsa.curves.Curve zDI don't know about the curve with oid %s.I only know about these: %scSg|]}|jqSr5rOrhcr5r5r6 5zfind_curve..)rrDr) oid_curverr5r5r6r%s rcCsFtD]}||jks|jr||jkr|Sqtd|ddtD)a{Select a curve based on its name. Returns a :py:class:`~ecdsa.curves.Curve` object with a ``name`` name. Note that ``name`` is case-sensitve. :param str name: Name of the curve to return, like ``NIST256p`` or ``prime256v1`` :raises UnknownCurveError: When the name doesn't match any of the supported curves :rtype: ~ecdsa.curves.Curve z9Curve with name {0!r} unknown, only curves supported: {1}cSrr5rOrr5r5r6rLrz!curve_by_name..)rr9r:rrw)r9rr5r5r6r9srN)g __future__rsixrrrrrutilr r r _compatr r __all__r+r, Exceptionrr curve_112r1generator_112r1r curve_112r2generator_112r2r curve_128r1generator_128r1r curve_160r1generator_160r1r curve_192 generator_192r curve_224 generator_224r curve_256 generator_256r curve_384 generator_384r curve_521 generator_521rcurve_secp256k1generator_secp256k1rcurve_brainpoolp160r1generator_brainpoolp160r1rcurve_brainpoolp160t1generator_brainpoolp160t1rcurve_brainpoolp192r1generator_brainpoolp192r1rcurve_brainpoolp192t1generator_brainpoolp192t1r curve_brainpoolp224r1generator_brainpoolp224r1r!curve_brainpoolp224t1generator_brainpoolp224t1r"curve_brainpoolp256r1generator_brainpoolp256r1r#curve_brainpoolp256t1generator_brainpoolp256t1r$curve_brainpoolp320r1generator_brainpoolp320r1r%curve_brainpoolp320t1generator_brainpoolp320t1r&curve_brainpoolp384r1generator_brainpoolp384r1r'curve_brainpoolp384t1generator_brainpoolp384t1r(curve_brainpoolp512r1generator_brainpoolp512r1r)curve_brainpoolp512t1generator_brainpoolp512t1r* curve_ed25519generator_ed25519r- curve_ed448generator_ed448r.rrrr5r5r5r6s &e