mirror of
https://github.com/Legrandin/pycryptodome.git
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48 lines
1.8 KiB
Python
48 lines
1.8 KiB
Python
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# This file is licensed under the BSD 2-Clause License.
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# See https://opensource.org/licenses/BSD-2-Clause for details.
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from ._curve import _Curve
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from Crypto.Math.Numbers import Integer
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from Crypto.Util._raw_api import load_pycryptodome_raw_lib
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def curve25519_curve():
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p = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffed # 2**255 - 19
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order = 0x1000000000000000000000000000000014def9dea2f79cd65812631a5cf5d3ed
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_curve25519_lib = load_pycryptodome_raw_lib("Crypto.PublicKey._curve25519", """
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typedef void Point;
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int curve25519_new_point(Point **out,
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const uint8_t x[32],
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size_t modsize);
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int curve25519_clone(Point **P, const Point *Q);
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void curve25519_free_point(Point *p);
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int curve25519_get_x(uint8_t *xb, size_t modsize, Point *p);
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int curve25519_scalar(Point *P, const uint8_t *scalar, size_t scalar_len, uint64_t seed);
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int curve25519_cmp(const Point *ecp1, const Point *ecp2);
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""")
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class EcLib(object):
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new_point = _curve25519_lib.curve25519_new_point
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clone = _curve25519_lib.curve25519_clone
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free_point = _curve25519_lib.curve25519_free_point
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get_x = _curve25519_lib.curve25519_get_x
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scalar = _curve25519_lib.curve25519_scalar
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cmp = _curve25519_lib.curve25519_cmp
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curve25519 = _Curve(Integer(p),
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None,
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Integer(order),
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Integer(9),
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None,
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None,
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255,
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"1.3.101.110", # RFC8410
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None,
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"Curve25519", # desc: used throughout; do not change
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None,
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"curve25519",
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EcLib)
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return curve25519
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