Switch to sslcrypto v4.0 to support OpenSSL without builtin curves
This commit is contained in:
Ivanq
parent
53a6063576
commit
7e17a4e967
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@ -18,23 +18,176 @@ else:
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class ECC:
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# pylint: disable=line-too-long
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# name: (nid, p, n, a, b, (Gx, Gy)),
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CURVES = {
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"secp112r1": 704,
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"secp112r2": 705,
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"secp128r1": 706,
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"secp128r2": 707,
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"secp160k1": 708,
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"secp160r1": 709,
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"secp160r2": 710,
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"secp192k1": 711,
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"prime192v1": 409,
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"secp224k1": 712,
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"secp224r1": 713,
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"secp256k1": 714,
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"prime256v1": 415,
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"secp384r1": 715,
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"secp521r1": 716
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"secp112r1": (
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704,
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0xDB7C2ABF62E35E668076BEAD208B,
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0xDB7C2ABF62E35E7628DFAC6561C5,
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0xDB7C2ABF62E35E668076BEAD2088,
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0x659EF8BA043916EEDE8911702B22,
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(
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0x09487239995A5EE76B55F9C2F098,
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0xA89CE5AF8724C0A23E0E0FF77500
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)
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),
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"secp112r2": (
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705,
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0xDB7C2ABF62E35E668076BEAD208B,
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0x36DF0AAFD8B8D7597CA10520D04B,
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0x6127C24C05F38A0AAAF65C0EF02C,
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0x51DEF1815DB5ED74FCC34C85D709,
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(
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0x4BA30AB5E892B4E1649DD0928643,
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0xADCD46F5882E3747DEF36E956E97
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)
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),
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"secp128r1": (
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706,
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0xFFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF,
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0xFFFFFFFE0000000075A30D1B9038A115,
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0xFFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC,
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0xE87579C11079F43DD824993C2CEE5ED3,
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(
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0x161FF7528B899B2D0C28607CA52C5B86,
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0xCF5AC8395BAFEB13C02DA292DDED7A83
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)
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),
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"secp128r2": (
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707,
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0xFFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF,
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0x3FFFFFFF7FFFFFFFBE0024720613B5A3,
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0xD6031998D1B3BBFEBF59CC9BBFF9AEE1,
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0x5EEEFCA380D02919DC2C6558BB6D8A5D,
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(
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0x7B6AA5D85E572983E6FB32A7CDEBC140,
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0x27B6916A894D3AEE7106FE805FC34B44
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)
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),
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"secp160k1": (
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708,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73,
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0x0100000000000000000001B8FA16DFAB9ACA16B6B3,
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0,
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7,
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(
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0x3B4C382CE37AA192A4019E763036F4F5DD4D7EBB,
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0x938CF935318FDCED6BC28286531733C3F03C4FEE
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)
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),
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"secp160r1": (
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709,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF,
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0x0100000000000000000001F4C8F927AED3CA752257,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC,
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0x001C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45,
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(
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0x4A96B5688EF573284664698968C38BB913CBFC82,
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0x23A628553168947D59DCC912042351377AC5FB32
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)
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),
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"secp160r2": (
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710,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73,
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0x0100000000000000000000351EE786A818F3A1A16B,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70,
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0x00B4E134D3FB59EB8BAB57274904664D5AF50388BA,
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(
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0x52DCB034293A117E1F4FF11B30F7199D3144CE6D,
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0xFEAFFEF2E331F296E071FA0DF9982CFEA7D43F2E
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)
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),
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"secp192k1": (
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711,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37,
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0xFFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D,
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0,
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3,
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(
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0xDB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D,
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0x9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D
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)
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),
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"prime192v1": (
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409,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF,
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0xFFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC,
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0x64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1,
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(
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0x188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012,
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0x07192B95FFC8DA78631011ED6B24CDD573F977A11E794811
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)
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),
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"secp224k1": (
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712,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D,
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0x010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7,
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0,
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5,
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(
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0xA1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C,
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0x7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5
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)
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),
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"secp224r1": (
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713,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE,
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0xB4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4,
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(
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0xB70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21,
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0xBD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34
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)
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),
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"secp256k1": (
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714,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141,
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0,
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7,
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(
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0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798,
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0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8
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)
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),
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"prime256v1": (
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715,
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0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF,
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0xFFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551,
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0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC,
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0x5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B,
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(
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0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296,
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0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5
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)
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),
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"secp384r1": (
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716,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC,
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0xB3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF,
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(
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0xAA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7,
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0x3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F
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)
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),
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"secp521r1": (
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717,
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0x01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,
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0x01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409,
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0x01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC,
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0x0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00,
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(
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0x00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66,
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0x011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650
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)
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)
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}
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# pylint: enable=line-too-long
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def __init__(self, backend, aes):
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self._backend = backend
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@ -44,8 +197,8 @@ class ECC:
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def get_curve(self, name):
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if name not in self.CURVES:
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raise ValueError("Unknown curve {}".format(name))
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nid = self.CURVES[name]
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return EllipticCurve(self._backend(nid), self._aes, nid)
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nid, p, n, a, b, g = self.CURVES[name]
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return EllipticCurve(self._backend(p, n, a, b, g), self._aes, nid)
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def get_backend(self):
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@ -6,185 +6,13 @@ from .aes import aes
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from ._util import int_to_bytes, bytes_to_int, inverse, square_root_mod_prime
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# pylint: disable=line-too-long
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CURVES = {
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# nid: (p, n, a, b, (Gx, Gy)),
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704: (
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# secp112r1
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0xDB7C2ABF62E35E668076BEAD208B,
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0xDB7C2ABF62E35E7628DFAC6561C5,
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0xDB7C2ABF62E35E668076BEAD2088,
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0x659EF8BA043916EEDE8911702B22,
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(
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0x09487239995A5EE76B55F9C2F098,
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0xA89CE5AF8724C0A23E0E0FF77500
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)
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),
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705: (
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# secp112r2
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0xDB7C2ABF62E35E668076BEAD208B,
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0x36DF0AAFD8B8D7597CA10520D04B,
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0x6127C24C05F38A0AAAF65C0EF02C,
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0x51DEF1815DB5ED74FCC34C85D709,
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(
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0x4BA30AB5E892B4E1649DD0928643,
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0xADCD46F5882E3747DEF36E956E97
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)
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),
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706: (
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# secp128r1
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0xFFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF,
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0xFFFFFFFE0000000075A30D1B9038A115,
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0xFFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC,
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0xE87579C11079F43DD824993C2CEE5ED3,
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(
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0x161FF7528B899B2D0C28607CA52C5B86,
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0xCF5AC8395BAFEB13C02DA292DDED7A83
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)
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),
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707: (
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# secp128r2
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0xFFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF,
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0x3FFFFFFF7FFFFFFFBE0024720613B5A3,
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0xD6031998D1B3BBFEBF59CC9BBFF9AEE1,
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0x5EEEFCA380D02919DC2C6558BB6D8A5D,
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(
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0x7B6AA5D85E572983E6FB32A7CDEBC140,
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0x27B6916A894D3AEE7106FE805FC34B44
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)
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),
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708: (
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# secp160k1
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73,
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0x0100000000000000000001B8FA16DFAB9ACA16B6B3,
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0,
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7,
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(
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0x3B4C382CE37AA192A4019E763036F4F5DD4D7EBB,
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0x938CF935318FDCED6BC28286531733C3F03C4FEE
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)
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),
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709: (
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# secp160r1
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF,
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0x0100000000000000000001F4C8F927AED3CA752257,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC,
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0x001C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45,
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(
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0x4A96B5688EF573284664698968C38BB913CBFC82,
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0x23A628553168947D59DCC912042351377AC5FB32
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)
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),
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710: (
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# secp160r2
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73,
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0x0100000000000000000000351EE786A818F3A1A16B,
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70,
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0x00B4E134D3FB59EB8BAB57274904664D5AF50388BA,
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(
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0x52DCB034293A117E1F4FF11B30F7199D3144CE6D,
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0xFEAFFEF2E331F296E071FA0DF9982CFEA7D43F2E
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)
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),
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711: (
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# secp192k1
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37,
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0xFFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D,
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0,
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3,
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(
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0xDB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D,
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0x9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D
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)
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),
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409: (
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# prime192v1
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF,
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0xFFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC,
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0x64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1,
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(
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0x188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012,
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0x07192B95FFC8DA78631011ED6B24CDD573F977A11E794811
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)
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),
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712: (
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# secp224k1
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0x00FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D,
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0x010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7,
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0,
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5,
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(
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0xA1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C,
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0x7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5
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)
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),
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713: (
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# secp224r1
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE,
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0xB4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4,
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(
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0xB70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21,
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0xBD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34
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)
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),
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714: (
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# secp256k1
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141,
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0,
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7,
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(
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0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798,
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0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8
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)
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),
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415: (
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# prime256v1
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0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF,
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0xFFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551,
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0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC,
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0x5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B,
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(
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0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296,
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0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5
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)
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),
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715: (
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# secp384r1
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973,
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0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC,
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0xB3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF,
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(
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0xAA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7,
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0x3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F
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)
|
||||
),
|
||||
716: (
|
||||
# secp521r1
|
||||
0x01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,
|
||||
0x01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409,
|
||||
0x01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC,
|
||||
0x0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00,
|
||||
(
|
||||
0x00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66,
|
||||
0x011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650
|
||||
)
|
||||
)
|
||||
}
|
||||
# pylint: enable=line-too-long
|
||||
|
||||
|
||||
class EllipticCurveBackend:
|
||||
def __init__(self, nid):
|
||||
self.p, self.n, self.a, self.b, self.g = CURVES[nid]
|
||||
self.jacobian = JacobianCurve(*CURVES[nid])
|
||||
def __init__(self, p, n, a, b, g):
|
||||
self.p, self.n, self.a, self.b, self.g = p, n, a, b, g
|
||||
self.jacobian = JacobianCurve(p, n, a, b, g)
|
||||
|
||||
self.public_key_length = (len(bin(self.p).replace("0b", "")) + 7) // 8
|
||||
self.order_bitlength = len(bin(self.n).replace("0b", ""))
|
||||
self.public_key_length = (len(bin(p).replace("0b", "")) + 7) // 8
|
||||
self.order_bitlength = len(bin(n).replace("0b", ""))
|
||||
|
||||
|
||||
def _int_to_bytes(self, raw, len=None):
|
||||
|
|
|
|||
|
|
@ -10,7 +10,7 @@ from .library import lib, openssl_backend
|
|||
lib.BN_new.restype = ctypes.POINTER(ctypes.c_char)
|
||||
lib.BN_bin2bn.restype = ctypes.POINTER(ctypes.c_char)
|
||||
lib.BN_CTX_new.restype = ctypes.POINTER(ctypes.c_char)
|
||||
lib.EC_GROUP_new_by_curve_name.restype = ctypes.POINTER(ctypes.c_char)
|
||||
lib.EC_GROUP_new_curve_GFp.restype = ctypes.POINTER(ctypes.c_char)
|
||||
lib.EC_KEY_new.restype = ctypes.POINTER(ctypes.c_char)
|
||||
lib.EC_POINT_new.restype = ctypes.POINTER(ctypes.c_char)
|
||||
lib.EC_KEY_get0_private_key.restype = ctypes.POINTER(ctypes.c_char)
|
||||
|
|
@ -28,12 +28,12 @@ thread_local = threading.local()
|
|||
# 1.1.0) use global objects so they aren't thread safe. Fortunately we can check
|
||||
# the code to find out which functions are thread safe.
|
||||
#
|
||||
# For example, EC_GROUP_new_by_curve_name checks global error code to initialize
|
||||
# For example, EC_GROUP_new_curve_GFp checks global error code to initialize
|
||||
# the group, so if two errors happen at once or two threads read the error code,
|
||||
# or the codes are read in the wrong order, the group is initialized in a wrong
|
||||
# way.
|
||||
#
|
||||
# EC_KEY_new_by_curve_name calls EC_GROUP_new_by_curve_name so it's not thread
|
||||
# EC_KEY_new_by_curve_name calls EC_GROUP_new_curve_GFp so it's not thread
|
||||
# safe. We can't use the lock because it would be too slow; instead, we use
|
||||
# EC_KEY_new and then EC_KEY_set_group which calls EC_GROUP_copy instead which
|
||||
# is thread safe.
|
||||
|
|
@ -68,14 +68,16 @@ class BN:
|
|||
if value is None:
|
||||
self.bn = lib.BN_new()
|
||||
self._free = True
|
||||
elif isinstance(value, bytes):
|
||||
self.bn = lib.BN_bin2bn(value, len(value), None)
|
||||
self._free = True
|
||||
else:
|
||||
elif isinstance(value, int) and value < 256:
|
||||
self.bn = lib.BN_new()
|
||||
lib.BN_clear(self.bn)
|
||||
lib.BN_add_word(self.bn, value)
|
||||
self._free = True
|
||||
else:
|
||||
if isinstance(value, int):
|
||||
value = value.to_bytes(128, "big")
|
||||
self.bn = lib.BN_bin2bn(value, len(value), None)
|
||||
self._free = True
|
||||
|
||||
|
||||
def __del__(self):
|
||||
|
|
@ -201,21 +203,27 @@ class BN:
|
|||
|
||||
|
||||
class EllipticCurveBackend:
|
||||
def __init__(self, nid):
|
||||
def __init__(self, p, n, a, b, g):
|
||||
bn_ctx = BN.Context.get()
|
||||
|
||||
self.lib = lib # For finalizer
|
||||
self.nid = nid
|
||||
|
||||
self.p = BN(p)
|
||||
self.order = BN(n)
|
||||
self.a = BN(a)
|
||||
self.b = BN(b)
|
||||
self.h = BN((p + n // 2) // n)
|
||||
|
||||
with lock:
|
||||
# Thread-safety
|
||||
self.group = lib.EC_GROUP_new_by_curve_name(self.nid)
|
||||
self.group = lib.EC_GROUP_new_curve_GFp(self.p.bn, self.a.bn, self.b.bn, bn_ctx)
|
||||
if not self.group:
|
||||
raise ValueError("Could not create group object")
|
||||
generator = self._public_key_to_point(g)
|
||||
lib.EC_GROUP_set_generator(self.group, generator, self.order.bn, self.h.bn)
|
||||
if not self.group:
|
||||
raise ValueError("The curve is not supported by OpenSSL")
|
||||
|
||||
self.order = BN()
|
||||
self.p = BN()
|
||||
bn_ctx = BN.Context.get()
|
||||
lib.EC_GROUP_get_order(self.group, self.order.bn, bn_ctx)
|
||||
lib.EC_GROUP_get_curve_GFp(self.group, self.p.bn, None, None, bn_ctx)
|
||||
|
||||
self.public_key_length = (len(self.p) + 7) // 8
|
||||
|
||||
self.is_supported_evp_pkey_ctx = hasattr(lib, "EVP_PKEY_CTX_new")
|
||||
|
|
|
|||
Loading…
Reference in New Issue