Tfg>ddlmZddlmZddlmZmZmZmZddl m Z m Z m Z ddl mZmZgdZdZd ZGd d eZGd 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;d3d4Z<ed5ej=ej>d6d7Z?ed8ej@ejAd9d:ZBed;ejCejDdejFejGd?d@ZHedAejIejJdBdCZKedDejLejMdEdFZNedGejOejPdHdIZQedJejRejSdKdLZTedMejUejVdNdOZWedPejXejYdQdRZZedSej[ej\dTdUZ]edVej^ej_dWZ`edXejaejbdYZce$e'e*e-e0e3e6e)rLs r9__repr__zCurve.__repr__Ys yr8 uncompressedc t| |jrd}nd}|dvrtd|dkr)|jstdtj|jSt |jtjr|dksJtd|j }tj d}tj tjttj |}tj tj t|j|z|tj t|j|z|}tj |j|}tj |j}|||||g} |jr@tj |j} | | tj | S) aSerialise the curve parameters to binary string. :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: DER encoded ECParameters structure :rtype: bytes N named_curveexplicitr[r\z5Only 'named_curve' and 'explicit' encodings supportedzJCan't encode curve using named_curve encoding without associated curve OIDz6Twisted Edwards curves don't support explicit encodingr)rI ValueErrorrrrJrCr@rrDrEencode_integerencode_sequencer,encode_octet_stringr abrAto_bytesrBcofactorappend) rLencodingpoint_encodingcurve_pversionfield_idr@baserB seq_elementsres r9to_derz Curve.to_der\s  x &(% 6 6 6G  } $ $8 '+>48, ,  M$; < < z))))#H  *,,..$Q''& NO ,c.@.I.I  #  # '!97CC    # '!97CC     &t~'>'>~'N'NOO"4>#7#7#9#9::5$> :    *)$**=*=*?*?@@H    ) ) )"L11r8cTtj|||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)rtopemrn)rLrgrhs r9to_pemz Curve.to_pems+y KK. 1 1?   r8c|std}td|Dstdt|}t j|sTd|vrt jdt j|\}}|rt jdt|Sd|vrt jdt j |\}}|rt jd t j |\}}|d krt jd t j |\}}t j |\}}t j |\} }t j |\} }d } |rt j |\} } t j|\} }| tkrtd | tkr"td| t j |\}}|rt jdt j |\}}t j |\}}t!|}t!|}t#j|||| }t"j|| d| d}t+d||d }t,D] }||kr|cS |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` r]c3K|]}|dvV dS)r]Nr7).0is r9 z!Curve.from_der..s(MM133MMMMMMr8z1Only named_curve and explicit encodings supportedr[z(named_curve curve parameters not allowedzUnexpected data after OIDr\z%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)rY compressedhybridT)valid_encodingsrBrAunknown)setallr^r r is_sequence UnexpectedDER remove_objectrremove_sequenceremove_integerremove_octet_stringr-rr,formatr rCurveFp PointJacobi from_bytesrr)dataryrIemptyseqrjrestrkr@ base_bytesrBre_ field_typeprime curve_a_bytes curve_b_bytescurve_acurve_bcurve_fprl tmp_curverus r9from_derzCurve.from_ders* ?!"=>>OMM_MMMMM C t$$t$$ #O33'>*400JC E'(CDDDc?? " _ , ,#$KLL L(.. U  #> *3//  a<<#$GHH H,T22$)$// t2488 D(.. t  3,T22KHa,X66 D 5 5 5#$IJJ J  ( (#)00<< )$// u  #L  "5e<< t!5d;; t#=11"=11 ((KK(33  D 4  )XtT::   AA~~r8c ts)t|tr|}|d}|dkrt jd|t j||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) rrCstrencodefindrr~runpem)clsstringryec_param_indexs r9from_pemzCurve.from_pems %z&#.. %]]__F%EFF R  #$HII I|| If^__- . .   r8rO)NrY) r4r5r6rMrSrUrXrnrq staticmethodr classmethodrr7r8r9rr9s4444*!!!:2:2:2:2x    $YYY\Yv   [   r8rr)rr secp112r1r)rrrrr< secp112r2r)rrrr secp128r1r)rrrrr= secp160r1r)rr0r1r2rrr prime192v1r)rrrr! secp224r1r)rr0r1r2rrr< prime256v1r)rrrr" secp384r1r)rrrr# secp521r1r)rrrr secp256k1r) rr$rrr0r=rrrbrainpoolP160r1r) rrrrrr0r=rrr0brainpoolP160t1r ) rrrrrr0r=rrrbrainpoolP192r1r!) rrrrrr0r=rrbrainpoolP192t1r") rrrrrr0r=rrbrainpoolP224r1r#) rrrrrr0r=rrrbrainpoolP224t1r$) rrrrrr0r=rrr<brainpoolP256r1r%) rrrrrr0r=rrr=brainpoolP256t1r&) rrrrrr0r=rr brainpoolP320r1r') rrrrrr0r=rrrbrainpoolP320t1r() rrrrrr0r=rr brainpoolP384r1r)) rrrrrr0r=rr brainpoolP384t1r*) rrrrrr0r=rr brainpoolP512r1r+) rrrrrr0r=rrbrainpoolP512t1r.)rrepr/)rrrqc|tD]}|j|kr|cStd|ddtD)a9Select a curve based on its OID :param tuple[int,...] oid_curve: ASN.1 Object Identifier of the curve to return, like ``(1, 2, 840, 10045, 3, 1, 7)`` for ``NIST256p``. :raises UnknownCurveError: When the oid doesn't match any of the supported curves :rtype: ~ecdsa.curves.Curve z&I don't know about the curve with oid z.I only know about these: cg|] }|j Sr7rWrtcs r9 zfind_curve..5s4L4L4LQV4L4L4Lr8)rrIr) oid_curvers r9rr%sd 5I  HHH   )24L4LV4L4L4L4L N  r8ctD]#}||jks|jr||jkr|cS$td|dtD)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}cg|] }|j Sr7rWrs r9rz!curve_by_name..Ls***a16***r8)rr>r?rr)r>rs r9rr9ss 16>>an>1G1GHHH CJJ **6***    r8N)g __future__rsixrrrrr utilr 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_brainpoolp192r1r curve_brainpoolp192t1generator_brainpoolp192t1r!curve_brainpoolp224r1generator_brainpoolp224r1r"curve_brainpoolp224t1generator_brainpoolp224t1r#curve_brainpoolp256r1generator_brainpoolp256r1r$curve_brainpoolp256t1generator_brainpoolp256t1r%curve_brainpoolp320r1generator_brainpoolp320r1r&curve_brainpoolp320t1generator_brainpoolp320t1r'curve_brainpoolp384r1generator_brainpoolp384r1r(curve_brainpoolp384t1generator_brainpoolp384t1r)curve_brainpoolp512r1generator_brainpoolp512r1r*curve_brainpoolp512t1generator_brainpoolp512t1r+ curve_ed25519generator_ed25519r. curve_ed448generator_ed448r/rrrr7r8r9rs............>>>>>>>>>>00000000 # # # L+7        ` ` ` ` ` ` ` ` H E       E       E       E       5 O     5 O     5 O     5 O     5 O     E      %  ## %  ## %  ## %  ## %  ## %  ## %  ## %  ## %  ## %  #$ %  #$ %  #$ %  #$ %  #$  %                         5 <(r8