V.jg>RddlmZddlmZddlmZmZmZmZddl m Z m Z m Z ddl mZmZgdZdZd ZGd d eZGd d Zedej,ej.ddZedej2ej4ddZedej8ej:ddZedej>ej@ddZ!edejDejFddZ$edejJejLddZ'ed ejPejRd!d"Z*ed#ejVejXd$d%Z-ed&ej\ej^d'd(Z0ed)ejbejdd*d+Z3ed,ejhejjd-d.Z6ed/ejnejpd0d1Z9ed2ejtejvd3d4Z<ed5ejzej|d6d7Z?ed8ejejd9d:ZBed;ejejdejejd?d@ZHedAejejdBdCZKedDejejdEdFZNedGejejdHdIZQedJejejdKdLZTedMejejdNdOZWedPejejdQdRZZedSejejdTdUZ]edVejejdWZ`edXejejdYZce$e'e*e-e0e3e6e)rLs r9__repr__zCurve.__repr__Ys yyr8c ||jrd}nd}|dvr td|dk(r3|js tdtj|jSt |j tjr|dk(sJtd|j j}tjd}tjtjttj|}tjtjt|j j|z|tjt|j j!|z|}tj|j"j%|}tj|j"j'}|||||g} |j j)r>tj|j j)} | 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 named_curveexplicitrYrZz5Only '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_elementsrcs r9to_derz Curve.to_der\s  xx(% 6 6G  } $88'+>>488, ,  M$;$; <z) ))#H  **,,.$$Q'&& NNO ,c.@.@.I ##  # # '!97C   # # '!97C   &&t~~'>'>~'NO""4>>#7#7#9:5$> ::   ))$***=*=*?@H    )""L11r8cNtj|j||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)rtopemrl)rLrerfs r9to_pemz Curve.to_pems%yy KK. 1?  r8cp|s td}td|Ds tdt|}t j |sSd|vrt j dt j|\}}|rt j dt|Sd|vrt j dt j|\}}|rt j d t j|\}}|d k7rt j d t j|\}}t j|\}}t j|\} }t j|\} }d } |rt j|\} } t j|\} }| tk(r td | tk7rtdj| t j|\}}|rt j dt j|\}}t j|\}}t!|}t!|}t#j$|||| }t"j&j)|| d| d}t+d||d }t,D] }||k(s |cS|S)aDecode the curve parameters from DER file. :param data: the binary string to decode the parameters from :type data: :term:`bytes-like object` :param valid_encodings: set of names of allowed encodings, by default all (set by passing ``None``), supported ones are ``named_curve`` and ``explicit`` :type valid_encodings: :term:`set-like object` r[c3$K|]}|dv yw)r[Nr7).0is r9 z!Curve.from_der..sM_133_sz1Only named_curve and explicit encodings supportedrYz(named_curve curve parameters not allowedzUnexpected data after OIDrZz%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) uncompressed compressedhybridT)valid_encodingsrBrAunknown)setallr\r r is_sequence UnexpectedDER remove_objectrremove_sequenceremove_integerremove_octet_stringr-rr,formatr rCurveFp PointJacobi from_bytesrr)datarxrIemptyseqrhrestrir@ base_bytesrBrc_ field_typeprime curve_a_bytes curve_b_bytescurve_acurve_bcurve_fprj tmp_curverss r9from_derzCurve.from_ders!"=>OM_MMC t$t$O3''>**40JC''(CDDc? " _ ,##$KL L((. U ##> **3/  a<##$GH H,,T2$))$/ t2248 D((. t ,,T2KHa,,X6 D 5 5#$IJ J  (#)00< ))$/ u ##L  "55e< t!55d; t#=1"=1 (((K((33  D 4 )XtT: AA~r8cts t|tr|j}|j d}|dk(rt j d|jt 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)clsstringrxec_param_indexs r9from_pemzCurve.from_pemsjz&#.]]_F%EF R ##$HI I|| IIf^_- .  r8rO)Nru) r4r5r6rMrSrUrWrlro staticmethodr classmethodrr7r8r9rr9sL4*!:2x $YYv  r8rr)rr secp112r1r)rrrrr< secp112r2r)rrrr secp128r1r)rrrrr= secp160r1r)rr0r1r2rrr prime192v1r)rrrr! secp224r1r)rr0r1r2rrr< prime256v1r)rrrr" secp384r1r)rrrr# secp521r1r)rrrr secp256k1r) rr$rrr0r=rrrbrainpoolP160r1r) rrrrrr0r=rrr0brainpoolP160t1r ) rrrrrr0r=rrrbrainpoolP192r1r!) rrrrrr0r=rrbrainpoolP192t1r") rrrrrr0r=rrbrainpoolP224r1r#) rrrrrr0r=rrrbrainpoolP224t1r$) rrrrrr0r=rrr<brainpoolP256r1r%) rrrrrr0r=rrr=brainpoolP256t1r&) rrrrrr0r=rr brainpoolP320r1r') rrrrrr0r=rrrbrainpoolP320t1r() rrrrrr0r=rr brainpoolP384r1r)) rrrrrr0r=rr brainpoolP384t1r*) rrrrrr0r=rr brainpoolP512r1r+) rrrrrr0r=rrbrainpoolP512t1r.)rrepr/)rrrqc tD]}|j|k(s|cStd|dtDcgc]}|jc}cc}w)a9Select a curve based on its OID :param tuple[int,...] oid_curve: ASN.1 Object Identifier of the curve to return, like ``(1, 2, 840, 10045, 3, 1, 7)`` for ``NIST256p``. :raises UnknownCurveError: When the oid doesn't match any of the supported curves :rtype: ~ecdsa.curves.Curve z&I don't know about the curve with oid z.I only know about these: )rrIrr>) oid_curvecs r9rr%sO 55I H )2V4LVQVVV4L N 4LsA c tD]1}||jk(s|js||jk(s/|cStdj |tDcgc]}|jc}cc}w)a{Select a curve based on its name. Returns a :py:class:`~ecdsa.curves.Curve` object with a ``name`` name. Note that ``name`` is case-sensitve. :param str name: Name of the curve to return, like ``NIST256p`` or ``prime256v1`` :raises UnknownCurveError: When the name doesn't match any of the supported curves :rtype: ~ecdsa.curves.Curve z9Curve with name {0!r} unknown, only curves supported: {1})rr>r?rr)r>rs r9rr9sg 166>ann1GH CJJ 6*6a1666*  *sA2N)g __future__rsixrrrrr utilr r r _compatr r__all__r,r- Exceptionrr curve_112r1generator_112r1r curve_112r2generator_112r2r curve_128r1generator_128r1r curve_160r1generator_160r1r curve_192 generator_192r curve_224 generator_224r curve_256 generator_256r curve_384 generator_384r curve_521 generator_521rcurve_secp256k1generator_secp256k1rcurve_brainpoolp160r1generator_brainpoolp160r1rcurve_brainpoolp160t1generator_brainpoolp160t1rcurve_brainpoolp192r1generator_brainpoolp192r1r curve_brainpoolp192t1generator_brainpoolp192t1r!curve_brainpoolp224r1generator_brainpoolp224r1r"curve_brainpoolp224t1generator_brainpoolp224t1r#curve_brainpoolp256r1generator_brainpoolp256r1r$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/rrrr7r8r9r s..>>0 # L+7  ` ` H                          OO     OO     OO     OO     OO           ###   ###   ###   ###   ###   ###   ###   ###   ###   ##$   ##$   ##$   ##$   ##$                         5 <(r8