94 lines
2.6 KiB
Python
94 lines
2.6 KiB
Python
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#!/usr/bin/env sage
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proof.all(False) # faster
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from sage.misc.banner import require_version
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if not require_version(9, 8, print_message=True):
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exit('')
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################################################################
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from parameters import lvl, f, p
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################################################################
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logp = ceil(log(p, 2))
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tors2val = (p+1).valuation(2)
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tors2part = (p+1).p_primary_part(2)
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tors3part = (p+1).p_primary_part(3)
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defs = dict()
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TORSION_2POWER_BYTES = (tors2part.bit_length() + 7) // 8
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SECURITY_BITS = round(p.bit_length() / 128) * 64
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RESPONSE_LENGTH = ceil(p.bit_length()/2)
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RESPONSE_BYTES = (RESPONSE_LENGTH + 9) // 8
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fpsz = (logp + 63)//64*8
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fp2sz = 2 * fpsz
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defs['SECURITY_BITS'] = SECURITY_BITS
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defs['SQIsign_response_length'] = ceil(logp/2)
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defs['HASH_ITERATIONS'] = 2**(32 * ceil( logp/64 ) - (tors2val - ceil(logp/2)))
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defs['FP_ENCODED_BYTES'] = fpsz
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defs['FP2_ENCODED_BYTES'] = fp2sz
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defs['EC_CURVE_ENCODED_BYTES'] = fp2sz # just the A
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defs['EC_POINT_ENCODED_BYTES'] = fp2sz # just the x
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defs['EC_BASIS_ENCODED_BYTES'] = 3 * defs['EC_POINT_ENCODED_BYTES']
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defs['PUBLICKEY_BYTES'] = defs['EC_CURVE_ENCODED_BYTES'] + 1 # extra byte for hint
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defs['SECRETKEY_BYTES'] = defs['PUBLICKEY_BYTES'] + 5*defs['FP_ENCODED_BYTES'] + 4*TORSION_2POWER_BYTES
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defs['SIGNATURE_BYTES'] = defs['EC_CURVE_ENCODED_BYTES'] + 2 + 4*RESPONSE_BYTES + (SECURITY_BITS//8) + 1 + 1
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size_privkey = defs['SECRETKEY_BYTES']
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size_pubkey = defs['PUBLICKEY_BYTES']
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size_signature = defs['SIGNATURE_BYTES']
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algname = f'SQIsign_lvl{lvl}'
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################################################################
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with open('include/encoded_sizes.h','w') as hfile:
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for k,v in defs.items():
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v = ZZ(v)
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print(f'#define {k} {v}', file=hfile)
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################################################################
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api = f'''
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// SPDX-License-Identifier: Apache-2.0
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#ifndef api_h
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#define api_h
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#include <sqisign_namespace.h>
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#define CRYPTO_SECRETKEYBYTES {size_privkey}
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#define CRYPTO_PUBLICKEYBYTES {size_pubkey}
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#define CRYPTO_BYTES {size_signature}
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#define CRYPTO_ALGNAME "{algname}"
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#if defined(ENABLE_SIGN)
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SQISIGN_API
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int
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crypto_sign_keypair(unsigned char *pk, unsigned char *sk);
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SQISIGN_API
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int
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crypto_sign(unsigned char *sm, unsigned long long *smlen,
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const unsigned char *m, unsigned long long mlen,
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const unsigned char *sk);
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#endif
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SQISIGN_API
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int
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crypto_sign_open(unsigned char *m, unsigned long long *mlen,
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const unsigned char *sm, unsigned long long smlen,
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const unsigned char *pk);
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#endif /* api_h */
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'''.strip()
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with open(f'../../../nistapi/lvl{lvl}/api.h', 'w') as f:
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print(api, file=f)
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