41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
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#!/usr/bin/env sage
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proof.all(False) # faster
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################################################################
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from parameters import p
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################################################################
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tors2part = (p+1).p_primary_part(2)
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lambda_security = round(p.bit_length() / 128) * 64
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N_sec = next_prime(1 << 4*lambda_security)
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N_com = N_sec
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defs = {
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'TORSION_2POWER_BYTES': (tors2part.bit_length() + 7) // 8,
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}
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from cformat import Ibz, Object, ObjectFormatter
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objs = ObjectFormatter([
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Object('ibz_t', 'TWO_TO_SECURITY_BITS', Ibz(1 << lambda_security)), # lambda_security = SECURITY_BITS (128, 192, 256)
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Object('ibz_t', 'TORSION_PLUS_2POWER', Ibz(tors2part)),
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Object('ibz_t', 'SEC_DEGREE', Ibz(N_sec)),
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Object('ibz_t', 'COM_DEGREE', Ibz(N_com)),
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])
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with open('include/torsion_constants.h','w') as hfile:
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with open('torsion_constants.c','w') as cfile:
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print(f'#include <quaternion.h>', file=hfile)
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print(f'#include <stddef.h>', file=cfile)
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print(f'#include <stdint.h>', file=cfile)
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print(f'#include <torsion_constants.h>', file=cfile)
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for k,v in defs.items():
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print(f'#define {k} {v}', file=hfile)
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objs.header(file=hfile)
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objs.implementation(file=cfile)
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