5 # Setup for Catacomb/Python bindings
7 # (c) 2004 Straylight/Edgeware
10 #----- Licensing notice -----------------------------------------------------
12 # This file is part of the Python interface to Catacomb.
14 # Catacomb/Python is free software; you can redistribute it and/or modify
15 # it under the terms of the GNU General Public License as published by
16 # the Free Software Foundation; either version 2 of the License, or
17 # (at your option) any later version.
19 # Catacomb/Python is distributed in the hope that it will be useful,
20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 # GNU General Public License for more details.
24 # You should have received a copy of the GNU General Public License
25 # along with Catacomb/Python; if not, write to the Free Software Foundation,
26 # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 import types
as _types
30 from binascii
import hexlify
as _hexify
, unhexlify
as _unhexify
38 for i
in ['MP', 'GF', 'Field',
39 'ECPt', 'ECPtCurve', 'ECCurve', 'ECInfo',
40 'DHInfo', 'BinDHInfo', 'RSAPriv', 'PrimeFilter', 'RabinMiller',
47 setattr(c
, j
[plen
:], classmethod(b
[j
]))
48 for i
in [gcciphers
, gchashes
, gcmacs
]:
51 d
[c
.name
.replace('-', '_')] = c
57 if type(a
) is _types
.MethodType
:
59 elif type(a
) not in (_types
.FunctionType
, staticmethod, classmethod):
65 return ByteString(_unhexify(x
))
66 fromhex
= staticmethod(fromhex
)
70 return 'bytes(%r)' %
hex(me
)
71 _augment(ByteString
, _tmp
)
72 bytes
= ByteString
.fromhex
75 def negp(x
): return x
< 0
76 def posp(x
): return x
> 0
77 def zerop(x
): return x
== 0
78 def oddp(x
): return x
.testbit(0)
79 def evenp(x
): return not x
.testbit(0)
80 def mont(x
): return MPMont(x
)
81 def barrett(x
): return MPBarrett(x
)
82 def reduce(x
): return MPReduce(x
)
85 if x
< 0: raise ValueError, 'factorial argument must be > 0'
86 return MP
.product(xrange(1, x
+ 1))
87 factorial
= staticmethod(factorial
)
93 raise SyntaxError, 'junk at end of string'
97 def reduce(x
): return GReduce(x
)
101 def fromstring(str): return _checkend(Field
.parse(str))
102 fromstring
= staticmethod(fromstring
)
103 _augment(Field
, _tmp
)
106 def __repr__(me
): return '%s(%sL)' %
(type(me
).__name__
, me
.p
)
107 def ec(me
, a
, b
): return ECPrimeProjCurve(me
, a
, b
)
108 _augment(PrimeField
, _tmp
)
111 def __repr__(me
): return '%s(%sL)' %
(type(me
).__name__
, hex(me
.p
))
112 def ec(me
, a
, b
): return ECBinProjCurve(me
, a
, b
)
113 _augment(BinField
, _tmp
)
116 def __str__(me
): return str(me
.value
)
117 def __repr__(me
): return '%s(%s)' %
(repr(me
.field
), repr(me
.value
))
120 class _groupmap (object):
121 def __init__(me
, map, nth
):
124 me
.i
= [None] * (max(map.values()) + 1)
126 return '{%s}' %
', '.join(['%r: %r' %
(k
, me
[k
]) for k
in me
])
127 def __contains__(me
, k
):
129 def __getitem__(me
, k
):
134 def __setitem__(me
, k
, v
):
135 raise TypeError, "immutable object"
139 return [k
for k
in me
]
141 return [me
[k
] for k
in me
]
142 eccurves
= _groupmap(_base
._eccurves
, ECInfo
._curven
)
143 primegroups
= _groupmap(_base
._pgroups
, DHInfo
._groupn
)
144 bingroups
= _groupmap(_base
._bingroups
, BinDHInfo
._groupn
)
148 return '%s(%r, %s, %s)' %
(type(me
).__name__
, me
.field
, me
.a
, me
.b
)
150 return ecpt
.frombuf(me
, s
)
152 return ecpt
.fromraw(me
, s
)
154 return ECPt(me
, *args
)
155 _augment(ECCurve
, _tmp
)
159 if not me
: return 'ECPt()'
160 return 'ECPt(%s, %s)' %
(me
.ix
, me
.iy
)
162 if not me
: return 'inf'
163 return '(%s, %s)' %
(me
.ix
, me
.iy
)
168 return 'ECInfo(curve = %r, G = %r, r = %s, h = %s)' % \
169 (me
.curve
, me
.G
, me
.r
, me
.h
)
172 _augment(ECInfo
, _tmp
)
176 if not me
: return '%r()' %
(me
.curve
)
177 return '%r(%s, %s)' %
(me
.curve
, me
.x
, me
.y
)
179 if not me
: return 'inf'
180 return '(%s, %s)' %
(me
.x
, me
.y
)
181 _augment(ECPtCurve
, _tmp
)
184 def __repr__(me
): return 'KeySZAny(%d)' % me
.default
185 def check(me
, sz
): return True
186 def best(me
, sz
): return sz
187 _augment(KeySZAny
, _tmp
)
191 return 'KeySZRange(%d, %d, %d, %d)' % \
192 (me
.default
, me
.min, me
.max, me
.mod
)
193 def check(me
, sz
): return me
.min <= sz
<= me
.max and sz % me
.mod
== 0
195 if sz
< me
.min: raise ValueError, 'key too small'
196 elif sz
> me
.max: return me
.max
197 else: return sz
- (sz % me
.mod
)
198 _augment(KeySZRange
, _tmp
)
201 def __repr__(me
): return 'KeySZSet(%d, %s)' %
(me
.default
, me
.set)
202 def check(me
, sz
): return sz
in me
.set
206 if found
< i
<= sz
: found
= i
207 if found
< 0: raise ValueError, 'key too small'
209 _augment(KeySZSet
, _tmp
)
213 return '%s(p = %s, r = %s, g = %s)' % \
214 (type(me
).__name__
, me
.p
, me
.r
, me
.g
)
215 _augment(FGInfo
, _tmp
)
218 def group(me
): return PrimeGroup(me
)
219 _augment(DHInfo
, _tmp
)
222 def group(me
): return BinGroup(me
)
223 _augment(BinDHInfo
, _tmp
)
227 return '%s(%r)' %
(type(me
).__name__
, me
.info
)
228 _augment(Group
, _tmp
)
232 return '%r(%r)' %
(me
.group
, str(me
))
235 class PKCS1Crypt(object):
236 def __init__(me
, ep
= '', rng
= rand
):
239 def encode(me
, msg
, nbits
):
240 return _base
._p1crypt_encode(msg
, nbits
, me
.ep
, me
.rng
)
241 def decode(me
, ct
, nbits
):
242 return _base
._p1crypt_decode(ct
, nbits
, me
.ep
, me
.rng
)
244 class PKCS1Sig(object):
245 def __init__(me
, ep
= '', rng
= rand
):
248 def encode(me
, msg
, nbits
):
249 return _base
._p1sig_encode(msg
, nbits
, me
.ep
, me
.rng
)
250 def decode(me
, msg
, sig
, nbits
):
251 return _base
._p1sig_decode(msg
, sig
, nbits
, me
.ep
, me
.rng
)
254 def __init__(me
, mgf
= sha_mgf
, hash = sha
, ep
= '', rng
= rand
):
259 def encode(me
, msg
, nbits
):
260 return _base
._oaep_encode(msg
, nbits
, me
.mgf
, me
.hash, me
.ep
, me
.rng
)
261 def decode(me
, ct
, nbits
):
262 return _base
._oaep_decode(ct
, nbits
, me
.mgf
, me
.hash, me
.ep
, me
.rng
)
265 def __init__(me
, mgf
= sha_mgf
, hash = sha
, saltsz
= None, rng
= rand
):
272 def encode(me
, msg
, nbits
):
273 return _base
._pss_encode(msg
, nbits
, me
.mgf
, me
.hash, me
.saltsz
, me
.rng
)
274 def decode(me
, msg
, sig
, nbits
):
275 return _base
._pss_decode(msg
, sig
, nbits
,
276 me
.mgf
, me
.hash, me
.saltsz
, me
.rng
)
279 def encrypt(me
, msg
, enc
):
280 return me
.pubop(enc
.encode(msg
, me
.n
.nbits
))
281 def verify(me
, msg
, sig
, enc
):
282 if msg
is None: return enc
.decode(msg
, me
.pubop(sig
), me
.n
.nbits
)
284 x
= enc
.decode(msg
, me
.pubop(sig
), me
.n
.nbits
)
285 return x
is None or x
== msg
288 _augment(RSAPub
, _tmp
)
291 def decrypt(me
, ct
, enc
): return enc
.decode(me
.privop(ct
), me
.n
.nbits
)
292 def sign(me
, msg
, enc
): return me
.privop(enc
.encode(msg
, me
.n
.nbits
))
293 _augment(RSAPriv
, _tmp
)
296 class SophieGermainStepJump (object):
297 def pg_begin(me
, ev
):
298 me
.lf
= PrimeFilter(ev
.x
)
299 me
.hf
= me
.lf
.muladd(2, 1)
305 while me
.lf
.status
== PGEN_FAIL
or me
.hf
.status
== PGEN_FAIL
:
307 if me
.lf
.status
== PGEN_ABORT
or me
.hf
.status
== PGEN_ABORT
:
310 if me
.lf
.status
== PGEN_DONE
and me
.hf
.status
== PGEN_DONE
:
317 class SophieGermainStepper (SophieGermainStepJump
):
318 def __init__(me
, step
):
325 class SophieGermainJumper (SophieGermainStepJump
):
326 def __init__(me
, jump
):
327 me
.ljump
= PrimeFilter(jump
);
328 me
.hjump
= me
.ljump
.muladd(2, 0)
335 SophieGermainStepJump
.pg_done(me
, ev
)
337 class SophieGermainTester (object):
340 def pg_begin(me
, ev
):
341 me
.lr
= RabinMiller(ev
.x
)
342 me
.hr
= RabinMiller(2 * ev
.x
+ 1)
344 lst
= me
.lr
.test(ev
.rng
.range(me
.lr
.x
))
345 if lst
!= PGEN_PASS
and lst
!= PGEN_DONE
:
347 rst
= me
.hr
.test(ev
.rng
.range(me
.hr
.x
))
348 if rst
!= PGEN_PASS
and rst
!= PGEN_DONE
:
350 if lst
== PGEN_DONE
and rst
== PGEN_DONE
:
357 class PrimeGenEventHandler (object):
358 def pg_begin(me
, ev
):
362 def pg_abort(me
, ev
):
369 class PrimitiveStepper (PrimeGenEventHandler
):
375 def pg_begin(me
, ev
):
376 me
.i
= iter(smallprimes
)
379 class PrimitiveTester (PrimeGenEventHandler
):
380 def __init__(me
, mod
, hh
= [], exp
= None):
386 if me
.exp
is not None:
387 x
= me
.mod
.exp(x
, me
.exp
)
388 if x
== 1: return PGEN_FAIL
390 if me
.mod
.exp(x
, h
) == 1: return PGEN_FAIL
394 class SimulStepper (PrimeGenEventHandler
):
395 def __init__(me
, mul
= 2, add
= 1, step
= 2):
399 def _stepfn(me
, step
):
401 raise ValueError, 'step must be positive'
403 return lambda f
: f
.step(step
)
404 j
= PrimeFilter(step
)
405 return lambda f
: f
.jump(j
)
406 def pg_begin(me
, ev
):
408 me
.lf
= PrimeFilter(x
)
409 me
.hf
= PrimeFilter(x
* me
.mul
+ me
.add
)
410 me
.lstep
= me
._stepfn(me
.step
)
411 me
.hstep
= me
._stepfn(me
.step
* me
.mul
)
412 SimulStepper
._cont(me
, ev
)
420 while me
.lf
.status
== PGEN_FAIL
or me
.hf
.status
== PGEN_FAIL
:
422 if me
.lf
.status
== PGEN_ABORT
or me
.hf
.status
== PGEN_ABORT
:
425 if me
.lf
.status
== PGEN_DONE
and me
.hf
.status
== PGEN_DONE
:
434 class SimulTester (PrimeGenEventHandler
):
435 def __init__(me
, mul
= 2, add
= 1):
438 def pg_begin(me
, ev
):
440 me
.lr
= RabinMiller(x
)
441 me
.hr
= RabinMiller(x
* me
.mul
+ me
.add
)
443 lst
= me
.lr
.test(ev
.rng
.range(me
.lr
.x
))
444 if lst
!= PGEN_PASS
and lst
!= PGEN_DONE
:
446 rst
= me
.hr
.test(ev
.rng
.range(me
.hr
.x
))
447 if rst
!= PGEN_PASS
and rst
!= PGEN_DONE
:
449 if lst
== PGEN_DONE
and rst
== PGEN_DONE
:
456 def sgprime(start
, step
= 2, name
= 'p', event
= pgen_nullev
, nsteps
= 0):
458 return pgen(start
, name
, SimulStepper(step
= step
), SimulTester(), event
,
459 nsteps
, RabinMiller
.iters(start
.nbits
))
461 def findprimitive(mod
, hh
= [], exp
= None, name
= 'g', event
= pgen_nullev
):
462 return pgen(0, name
, PrimitiveStepper(), PrimitiveTester(mod
, hh
, exp
),
465 def kcdsaprime(pbits
, qbits
, rng
= rand
,
466 event
= pgen_nullev
, name
= 'p', nsteps
= 0):
467 hbits
= pbits
- qbits
468 h
= pgen(rng
.mp(hbits
, 1), name
+ ' [h]',
469 PrimeGenStepper(2), PrimeGenTester(),
470 event
, nsteps
, RabinMiller
.iters(hbits
))
471 q
= pgen(rng
.mp(qbits
, 1), name
, SimulStepper(2 * h
, 1, 2),
472 SimulTester(2 * h
, 1), event
, nsteps
, RabinMiller
.iters(qbits
))
478 #----- That's all, folks ----------------------------------------------------