ec⁴ is a command-line utility written in Python that generates ECC constants as compilable code for a variety of curves, target languages, byte- and word-orderings.
Supported languages: C, Python, plain Integers or Custom
Supported byte order: big / little endian
Supported word order: big / little endian
Supported word sizes: 8 - 256 bits
git clone --recurse-submodules git@github.com:ncme/ecccc.git
cd ecccc
chmod +x ecccc.py
./ecccc --help
$./ecccc.py --curve secp256r1 --target-syntax C --word-size 8 --byte-order little --pretty-print
// ShortWeierstrassCurve<secp256r1>
// Relevant domain parameters:
static const uint32_t a[32] = {
0xfc, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff
}; // curve parameter a_4 = a
...
ec⁴ is licensed under the MIT license.