mirror of
https://git.tartarus.org/simon/putty.git
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72 lines
2.7 KiB
Python
72 lines
2.7 KiB
Python
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#!/usr/bin/env python3
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from testcrypt import *
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import base64
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import argparse
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import itertools
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assert sys.version_info[:2] >= (3,0), "This is Python 3 code"
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def main():
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opener = lambda mode: lambda fname: lambda: argparse.FileType(mode)(fname)
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parser = argparse.ArgumentParser(description='')
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IntArg = lambda x: int(x, 0)
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parser.add_argument("bits", type=IntArg, nargs="?", default=1024)
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parser.add_argument("-s", "--seed")
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parser.add_argument("-f", "--firstbits", type=IntArg, default=1)
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parser.add_argument("--fast", action='store_const',
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dest='policy', const='provable_fast')
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parser.add_argument("--complex", action='store_const',
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dest='policy', const='provable_maurer_complex')
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parser.add_argument("-q", "--quiet", action='store_true')
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parser.add_argument("-b", "--binary", action='store_const',
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dest='fmt', const='{:b}')
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parser.add_argument("-x", "--hex", action='store_const',
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dest='fmt', const='{:x}')
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parser.add_argument("-o", "--output", type=opener("w"),
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default=opener("w")("-"),
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help="file to write the prime to")
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parser.add_argument("--mpu", type=opener("w"),
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help="MPU certificate output file")
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parser.add_argument("--safe", action='store_true')
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parser.set_defaults(fmt='{:d}', policy='provable_maurer_simple')
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args = parser.parse_args()
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seed = args.seed
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if seed is None:
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with open("/dev/urandom", "rb") as f:
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seed = base64.b64encode(f.read(32)).decode("ASCII")
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if not args.quiet:
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print("seed =", seed)
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random_make_prng('sha256', seed)
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assert args.firstbits > 0
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nfirst = next(i for i in itertools.count() if (args.firstbits >> i) == 0)
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pgc = primegen_new_context(args.policy)
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if args.safe:
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while True:
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pcs_q = pcs_new_with_firstbits(args.bits - 1,
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args.firstbits, nfirst)
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pcs_try_sophie_germain(pcs_q)
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q = primegen_generate(pgc, pcs_q)
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pcs = pcs_new(args.bits)
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pcs_require_residue_1_mod_prime(pcs, q)
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pcs_set_oneshot(pcs)
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p = primegen_generate(pgc, pcs)
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if p is not None:
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break
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else:
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pcs = pcs_new_with_firstbits(args.bits, args.firstbits, nfirst)
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p = primegen_generate(pgc, pcs)
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with args.output() as f:
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print(args.fmt.format(int(p)), file=f)
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if args.mpu is not None:
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s = primegen_mpu_certificate(pgc, p)
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with args.mpu() as f:
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f.write(s.decode("ASCII"))
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if __name__ == '__main__':
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main()
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