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00401529 MW |
1 | ### -*-python-*- |
2 | ### | |
3 | ### Setup for Catacomb/Python bindings | |
4 | ### | |
5 | ### (c) 2004 Straylight/Edgeware | |
6 | ### | |
7 | ||
8 | ###----- Licensing notice --------------------------------------------------- | |
9 | ### | |
10 | ### This file is part of the Python interface to Catacomb. | |
11 | ### | |
12 | ### Catacomb/Python is free software; you can redistribute it and/or modify | |
13 | ### it under the terms of the GNU General Public License as published by | |
14 | ### the Free Software Foundation; either version 2 of the License, or | |
15 | ### (at your option) any later version. | |
16 | ### | |
17 | ### Catacomb/Python is distributed in the hope that it will be useful, | |
18 | ### but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ### GNU General Public License for more details. | |
21 | ### | |
22 | ### You should have received a copy of the GNU General Public License | |
23 | ### along with Catacomb/Python; if not, write to the Free Software Foundation, | |
24 | ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
ed8cc62d | 25 | |
6bd22b53 MW |
26 | from __future__ import with_statement |
27 | ||
d7ab1bab | 28 | from binascii import hexlify as _hexify, unhexlify as _unhexify |
6bd22b53 | 29 | from contextlib import contextmanager as _ctxmgr |
a3ae4a9f MW |
30 | import DLFCN as _dlfcn |
31 | import os as _os | |
6bd22b53 | 32 | from struct import pack as _pack |
378ceeef MW |
33 | import sys as _sys |
34 | import types as _types | |
35 | ||
36 | ###-------------------------------------------------------------------------- | |
37 | ### Import the main C extension module. | |
38 | ||
a3ae4a9f MW |
39 | try: |
40 | _dlflags = _odlflags = _sys.getdlopenflags() | |
41 | except AttributeError: | |
42 | _dlflags = _odlflags = -1 | |
43 | ||
44 | ## Set the `deep binding' flag. Python has its own different MD5 | |
45 | ## implementation, and some distributions export `md5_init' and friends so | |
46 | ## they override our versions, which doesn't end well. Figure out how to | |
47 | ## turn this flag on so we don't have the problem. | |
48 | if _dlflags >= 0: | |
49 | try: _dlflags |= _dlfcn.RTLD_DEEPBIND | |
50 | except AttributeError: | |
51 | try: _dlflags |= _os.RTLD_DEEPBIND | |
52 | except AttributeError: | |
53 | if _os.uname()[0] == 'Linux': _dlflags |= 8 # magic knowledge | |
54 | else: pass # can't do this. | |
55 | _sys.setdlopenflags(_dlflags) | |
56 | ||
378ceeef | 57 | import _base |
46e6ad89 | 58 | |
a3ae4a9f MW |
59 | if _odlflags >= 0: |
60 | _sys.setdlopenflags(_odlflags) | |
61 | ||
62 | del _dlflags, _odlflags | |
63 | ||
00401529 MW |
64 | ###-------------------------------------------------------------------------- |
65 | ### Basic stuff. | |
ed8cc62d | 66 | |
c04b289c MW |
67 | ## For the benefit of the default keyreporter, we need the program name. |
68 | _base._ego(_sys.argv[0]) | |
d7ab1bab | 69 | |
837fa485 MW |
70 | ## How to fix a name back into the right identifier. Alas, the rules are not |
71 | ## consistent. | |
72 | def _fixname(name): | |
73 | ||
74 | ## Hyphens consistently become underscores. | |
75 | name = name.replace('-', '_') | |
76 | ||
77 | ## But slashes might become underscores or just vanish. | |
78 | if name.startswith('salsa20'): name = name.translate(None, '/') | |
79 | else: name = name.replace('/', '_') | |
80 | ||
81 | ## Done. | |
82 | return name | |
83 | ||
ed8cc62d MW |
84 | ## Initialize the module. Drag in the static methods of the various |
85 | ## classes; create names for the various known crypto algorithms. | |
d7ab1bab | 86 | def _init(): |
87 | d = globals() | |
88 | b = _base.__dict__; | |
89 | for i in b: | |
90 | if i[0] != '_': | |
91 | d[i] = b[i]; | |
5a8b43b3 MW |
92 | for i in ['ByteString', |
93 | 'MP', 'GF', 'Field', | |
00401529 MW |
94 | 'ECPt', 'ECPtCurve', 'ECCurve', 'ECInfo', |
95 | 'DHInfo', 'BinDHInfo', 'RSAPriv', 'BBSPriv', | |
96 | 'PrimeFilter', 'RabinMiller', | |
97 | 'Group', 'GE', | |
89157adc | 98 | 'KeySZ', 'KeyData']: |
d7ab1bab | 99 | c = d[i] |
100 | pre = '_' + i + '_' | |
101 | plen = len(pre) | |
102 | for j in b: | |
103 | if j[:plen] == pre: | |
00401529 | 104 | setattr(c, j[plen:], classmethod(b[j])) |
ed8cc62d MW |
105 | for i in [gcciphers, gchashes, gcmacs, gcprps]: |
106 | for c in i.itervalues(): | |
837fa485 | 107 | d[_fixname(c.name)] = c |
ed8cc62d | 108 | for c in gccrands.itervalues(): |
837fa485 | 109 | d[_fixname(c.name + 'rand')] = c |
d7ab1bab | 110 | _init() |
111 | ||
ed8cc62d MW |
112 | ## A handy function for our work: add the methods of a named class to an |
113 | ## existing class. This is how we write the Python-implemented parts of our | |
114 | ## mostly-C types. | |
d7ab1bab | 115 | def _augment(c, cc): |
116 | for i in cc.__dict__: | |
117 | a = cc.__dict__[i] | |
118 | if type(a) is _types.MethodType: | |
119 | a = a.im_func | |
120 | elif type(a) not in (_types.FunctionType, staticmethod, classmethod): | |
121 | continue | |
122 | setattr(c, i, a) | |
123 | ||
ed8cc62d MW |
124 | ## Parsing functions tend to return the object parsed and the remainder of |
125 | ## the input. This checks that the remainder is input and, if so, returns | |
126 | ## just the object. | |
127 | def _checkend(r): | |
128 | x, rest = r | |
129 | if rest != '': | |
130 | raise SyntaxError, 'junk at end of string' | |
131 | return x | |
132 | ||
96d7ed6c | 133 | ## Some pretty-printing utilities. |
652e16ea | 134 | PRINT_SECRETS = False |
330e6a74 | 135 | def _clsname(me): return type(me).__name__ |
652e16ea MW |
136 | def _repr_secret(thing, secretp = True): |
137 | if not secretp or PRINT_SECRETS: return repr(thing) | |
138 | else: return '#<SECRET>' | |
96d7ed6c | 139 | def _pp_str(me, pp, cyclep): pp.text(cyclep and '...' or str(me)) |
652e16ea MW |
140 | def _pp_secret(pp, thing, secretp = True): |
141 | if not secretp or PRINT_SECRETS: pp.pretty(thing) | |
142 | else: pp.text('#<SECRET>') | |
582568f1 MW |
143 | def _pp_bgroup(pp, text): |
144 | ind = len(text) | |
145 | pp.begin_group(ind, text) | |
146 | return ind | |
147 | def _pp_bgroup_tyname(pp, obj, open = '('): | |
330e6a74 | 148 | return _pp_bgroup(pp, _clsname(obj) + open) |
652e16ea | 149 | def _pp_kv(pp, k, v, secretp = False): |
582568f1 | 150 | ind = _pp_bgroup(pp, k + ' = ') |
652e16ea | 151 | _pp_secret(pp, v, secretp) |
96d7ed6c MW |
152 | pp.end_group(ind, '') |
153 | def _pp_commas(pp, printfn, items): | |
154 | firstp = True | |
155 | for i in items: | |
156 | if firstp: firstp = False | |
157 | else: pp.text(','); pp.breakable() | |
158 | printfn(i) | |
159 | def _pp_dict(pp, items): | |
160 | def p((k, v)): | |
582568f1 | 161 | pp.begin_group(0) |
96d7ed6c MW |
162 | pp.pretty(k) |
163 | pp.text(':') | |
582568f1 | 164 | pp.begin_group(2) |
96d7ed6c MW |
165 | pp.breakable() |
166 | pp.pretty(v) | |
582568f1 MW |
167 | pp.end_group(2) |
168 | pp.end_group(0) | |
96d7ed6c MW |
169 | _pp_commas(pp, p, items) |
170 | ||
00401529 MW |
171 | ###-------------------------------------------------------------------------- |
172 | ### Bytestrings. | |
ed8cc62d | 173 | |
d7ab1bab | 174 | class _tmp: |
175 | def fromhex(x): | |
176 | return ByteString(_unhexify(x)) | |
177 | fromhex = staticmethod(fromhex) | |
178 | def __hex__(me): | |
179 | return _hexify(me) | |
180 | def __repr__(me): | |
181 | return 'bytes(%r)' % hex(me) | |
182 | _augment(ByteString, _tmp) | |
bfb450cc | 183 | ByteString.__hash__ = str.__hash__ |
d7ab1bab | 184 | bytes = ByteString.fromhex |
185 | ||
00401529 | 186 | ###-------------------------------------------------------------------------- |
bfb450cc MW |
187 | ### Hashing. |
188 | ||
189 | class _tmp: | |
190 | def check(me, h): | |
191 | hh = me.done() | |
192 | return ctstreq(h, hh) | |
193 | _augment(GHash, _tmp) | |
194 | _augment(Poly1305Hash, _tmp) | |
195 | ||
6bd22b53 MW |
196 | class _HashBase (object): |
197 | ## The standard hash methods. Assume that `hash' is defined and returns | |
198 | ## the receiver. | |
199 | def hashu8(me, n): return me.hash(_pack('B', n)) | |
200 | def hashu16l(me, n): return me.hash(_pack('<H', n)) | |
201 | def hashu16b(me, n): return me.hash(_pack('>H', n)) | |
202 | hashu16 = hashu16b | |
203 | def hashu32l(me, n): return me.hash(_pack('<L', n)) | |
204 | def hashu32b(me, n): return me.hash(_pack('>L', n)) | |
205 | hashu32 = hashu32b | |
206 | def hashu64l(me, n): return me.hash(_pack('<Q', n)) | |
207 | def hashu64b(me, n): return me.hash(_pack('>Q', n)) | |
208 | hashu64 = hashu64b | |
209 | def hashbuf8(me, s): return me.hashu8(len(s)).hash(s) | |
210 | def hashbuf16l(me, s): return me.hashu16l(len(s)).hash(s) | |
211 | def hashbuf16b(me, s): return me.hashu16b(len(s)).hash(s) | |
212 | hashbuf16 = hashbuf16b | |
213 | def hashbuf32l(me, s): return me.hashu32l(len(s)).hash(s) | |
214 | def hashbuf32b(me, s): return me.hashu32b(len(s)).hash(s) | |
215 | hashbuf32 = hashbuf32b | |
216 | def hashbuf64l(me, s): return me.hashu64l(len(s)).hash(s) | |
217 | def hashbuf64b(me, s): return me.hashu64b(len(s)).hash(s) | |
218 | hashbuf64 = hashbuf64b | |
219 | def hashstrz(me, s): return me.hash(s).hashu8(0) | |
220 | ||
221 | class _ShakeBase (_HashBase): | |
222 | ||
223 | ## Python gets really confused if I try to augment `__new__' on native | |
224 | ## classes, so wrap and delegate. Sorry. | |
225 | def __init__(me, perso = '', *args, **kw): | |
226 | super(_ShakeBase, me).__init__(*args, **kw) | |
227 | me._h = me._SHAKE(perso = perso, func = me._FUNC) | |
228 | ||
229 | ## Delegate methods... | |
230 | def copy(me): new = me.__class__(); new._copy(me) | |
231 | def _copy(me, other): me._h = other._h | |
232 | def hash(me, m): me._h.hash(m); return me | |
233 | def xof(me): me._h.xof(); return me | |
234 | def get(me, n): return me._h.get(n) | |
235 | def mask(me, m): return me._h.mask(m) | |
236 | def done(me, n): return me._h.done(n) | |
237 | def check(me, h): return ctstreq(h, me.done(len(h))) | |
238 | @property | |
239 | def state(me): return me._h.state | |
240 | @property | |
241 | def buffered(me): return me._h.buffered | |
242 | @property | |
243 | def rate(me): return me._h.rate | |
244 | ||
245 | class _tmp: | |
246 | def check(me, h): | |
247 | return ctstreq(h, me.done(len(h))) | |
248 | def leftenc(me, n): | |
249 | nn = MP(n).storeb() | |
250 | return me.hashu8(len(nn)).hash(nn) | |
251 | def rightenc(me, n): | |
252 | nn = MP(n).storeb() | |
253 | return me.hash(nn).hashu8(len(nn)) | |
254 | def stringenc(me, str): | |
255 | return me.leftenc(8*len(str)).hash(str) | |
256 | def bytepad_before(me): | |
257 | return me.leftenc(me.rate) | |
258 | def bytepad_after(me): | |
259 | if me.buffered: me.hash(me._Z[:me.rate - me.buffered]) | |
260 | return me | |
261 | @_ctxmgr | |
262 | def bytepad(me): | |
263 | me.bytepad_before() | |
264 | yield me | |
265 | me.bytepad_after() | |
266 | _augment(Shake, _tmp) | |
267 | _augment(_ShakeBase, _tmp) | |
f22cdfa9 | 268 | Shake._Z = _ShakeBase._Z = ByteString.zero(200) |
6bd22b53 MW |
269 | |
270 | class KMAC (_ShakeBase): | |
271 | _FUNC = 'KMAC' | |
272 | def __init__(me, k, *arg, **kw): | |
273 | super(KMAC, me).__init__(*arg, **kw) | |
274 | with me.bytepad(): me.stringenc(k) | |
275 | def done(me, n = -1): | |
276 | if n < 0: n = me._TAGSZ | |
277 | me.rightenc(8*n) | |
278 | return super(KMAC, me).done(n) | |
279 | def xof(me): | |
280 | me.rightenc(0) | |
281 | return super(KMAC, me).xof() | |
282 | ||
283 | class KMAC128 (KMAC): _SHAKE = Shake128; _TAGSZ = 16 | |
284 | class KMAC256 (KMAC): _SHAKE = Shake256; _TAGSZ = 32 | |
285 | ||
bfb450cc | 286 | ###-------------------------------------------------------------------------- |
ce0340b6 MW |
287 | ### NaCl `secretbox'. |
288 | ||
289 | def secret_box(k, n, m): | |
290 | E = xsalsa20(k).setiv(n) | |
291 | r = E.enczero(poly1305.keysz.default) | |
292 | s = E.enczero(poly1305.masksz) | |
293 | y = E.encrypt(m) | |
294 | t = poly1305(r)(s).hash(y).done() | |
bb5c23a4 | 295 | return t + y |
ce0340b6 MW |
296 | |
297 | def secret_unbox(k, n, c): | |
298 | E = xsalsa20(k).setiv(n) | |
299 | r = E.enczero(poly1305.keysz.default) | |
300 | s = E.enczero(poly1305.masksz) | |
301 | y = c[poly1305.tagsz:] | |
302 | if not poly1305(r)(s).hash(y).check(c[0:poly1305.tagsz]): | |
303 | raise ValueError, 'decryption failed' | |
304 | return E.decrypt(c[poly1305.tagsz:]) | |
305 | ||
306 | ###-------------------------------------------------------------------------- | |
00401529 | 307 | ### Multiprecision integers and binary polynomials. |
ed8cc62d | 308 | |
2ef393b5 | 309 | def _split_rat(x): |
83c77564 | 310 | if isinstance(x, BaseRat): return x._n, x._d |
2ef393b5 | 311 | else: return x, 1 |
83c77564 MW |
312 | class BaseRat (object): |
313 | """Base class implementing fields of fractions over Euclidean domains.""" | |
2ef393b5 | 314 | def __new__(cls, a, b): |
83c77564 | 315 | a, b = cls.RING(a), cls.RING(b) |
2ef393b5 MW |
316 | q, r = divmod(a, b) |
317 | if r == 0: return q | |
318 | g = b.gcd(r) | |
83c77564 | 319 | me = super(BaseRat, cls).__new__(cls) |
2ef393b5 MW |
320 | me._n = a//g |
321 | me._d = b//g | |
322 | return me | |
323 | @property | |
324 | def numer(me): return me._n | |
325 | @property | |
326 | def denom(me): return me._d | |
327 | def __str__(me): return '%s/%s' % (me._n, me._d) | |
330e6a74 | 328 | def __repr__(me): return '%s(%s, %s)' % (_clsname(me), me._n, me._d) |
96d7ed6c | 329 | _repr_pretty_ = _pp_str |
2ef393b5 MW |
330 | |
331 | def __add__(me, you): | |
332 | n, d = _split_rat(you) | |
83c77564 | 333 | return type(me)(me._n*d + n*me._d, d*me._d) |
2ef393b5 MW |
334 | __radd__ = __add__ |
335 | def __sub__(me, you): | |
336 | n, d = _split_rat(you) | |
83c77564 | 337 | return type(me)(me._n*d - n*me._d, d*me._d) |
2ef393b5 MW |
338 | def __rsub__(me, you): |
339 | n, d = _split_rat(you) | |
83c77564 | 340 | return type(me)(n*me._d - me._n*d, d*me._d) |
2ef393b5 MW |
341 | def __mul__(me, you): |
342 | n, d = _split_rat(you) | |
83c77564 | 343 | return type(me)(me._n*n, me._d*d) |
2ef393b5 MW |
344 | def __div__(me, you): |
345 | n, d = _split_rat(you) | |
83c77564 | 346 | return type(me)(me._n*d, me._d*n) |
2ef393b5 MW |
347 | def __rdiv__(me, you): |
348 | n, d = _split_rat(you) | |
83c77564 | 349 | return type(me)(me._d*n, me._n*d) |
2ef393b5 MW |
350 | def __cmp__(me, you): |
351 | n, d = _split_rat(you) | |
83c77564 | 352 | return type(me)(me._n*d, n*me._d) |
2ef393b5 MW |
353 | def __rcmp__(me, you): |
354 | n, d = _split_rat(you) | |
355 | return cmp(n*me._d, me._n*d) | |
356 | ||
83c77564 MW |
357 | class IntRat (BaseRat): |
358 | RING = MP | |
359 | ||
360 | class GFRat (BaseRat): | |
361 | RING = GF | |
362 | ||
d7ab1bab | 363 | class _tmp: |
364 | def negp(x): return x < 0 | |
365 | def posp(x): return x > 0 | |
366 | def zerop(x): return x == 0 | |
367 | def oddp(x): return x.testbit(0) | |
368 | def evenp(x): return not x.testbit(0) | |
369 | def mont(x): return MPMont(x) | |
370 | def barrett(x): return MPBarrett(x) | |
371 | def reduce(x): return MPReduce(x) | |
83c77564 MW |
372 | def __div__(me, you): return IntRat(me, you) |
373 | def __rdiv__(me, you): return IntRat(you, me) | |
96d7ed6c | 374 | _repr_pretty_ = _pp_str |
d7ab1bab | 375 | _augment(MP, _tmp) |
376 | ||
d7ab1bab | 377 | class _tmp: |
fbc145f3 | 378 | def zerop(x): return x == 0 |
ed8cc62d | 379 | def reduce(x): return GFReduce(x) |
fbc145f3 MW |
380 | def trace(x, y): return x.reduce().trace(y) |
381 | def halftrace(x, y): return x.reduce().halftrace(y) | |
382 | def modsqrt(x, y): return x.reduce().sqrt(y) | |
383 | def quadsolve(x, y): return x.reduce().quadsolve(y) | |
83c77564 MW |
384 | def __div__(me, you): return GFRat(me, you) |
385 | def __rdiv__(me, you): return GFRat(you, me) | |
96d7ed6c | 386 | _repr_pretty_ = _pp_str |
d7ab1bab | 387 | _augment(GF, _tmp) |
388 | ||
ed8cc62d MW |
389 | class _tmp: |
390 | def product(*arg): | |
391 | 'product(ITERABLE) or product(I, ...) -> PRODUCT' | |
392 | return MPMul(*arg).done() | |
393 | product = staticmethod(product) | |
394 | _augment(MPMul, _tmp) | |
395 | ||
00401529 MW |
396 | ###-------------------------------------------------------------------------- |
397 | ### Abstract fields. | |
ed8cc62d | 398 | |
d7ab1bab | 399 | class _tmp: |
400 | def fromstring(str): return _checkend(Field.parse(str)) | |
401 | fromstring = staticmethod(fromstring) | |
402 | _augment(Field, _tmp) | |
403 | ||
404 | class _tmp: | |
330e6a74 | 405 | def __repr__(me): return '%s(%sL)' % (_clsname(me), me.p) |
6d481bc6 | 406 | def __hash__(me): return 0x114401de ^ hash(me.p) |
96d7ed6c | 407 | def _repr_pretty_(me, pp, cyclep): |
582568f1 MW |
408 | ind = _pp_bgroup_tyname(pp, me) |
409 | if cyclep: pp.text('...') | |
410 | else: pp.pretty(me.p) | |
411 | pp.end_group(ind, ')') | |
d7ab1bab | 412 | def ec(me, a, b): return ECPrimeProjCurve(me, a, b) |
413 | _augment(PrimeField, _tmp) | |
414 | ||
415 | class _tmp: | |
330e6a74 | 416 | def __repr__(me): return '%s(%#xL)' % (_clsname(me), me.p) |
d7ab1bab | 417 | def ec(me, a, b): return ECBinProjCurve(me, a, b) |
96d7ed6c | 418 | def _repr_pretty_(me, pp, cyclep): |
582568f1 MW |
419 | ind = _pp_bgroup_tyname(pp, me) |
420 | if cyclep: pp.text('...') | |
421 | else: pp.text('%#x' % me.p) | |
422 | pp.end_group(ind, ')') | |
d7ab1bab | 423 | _augment(BinField, _tmp) |
424 | ||
6d481bc6 MW |
425 | class _tmp: |
426 | def __hash__(me): return 0x23e4701c ^ hash(me.p) | |
427 | _augment(BinPolyField, _tmp) | |
428 | ||
429 | class _tmp: | |
430 | def __hash__(me): | |
431 | h = 0x9a7d6240 | |
432 | h ^= hash(me.p) | |
433 | h ^= 2*hash(me.beta) & 0xffffffff | |
434 | return h | |
435 | _augment(BinNormField, _tmp) | |
436 | ||
d7ab1bab | 437 | class _tmp: |
438 | def __str__(me): return str(me.value) | |
439 | def __repr__(me): return '%s(%s)' % (repr(me.field), repr(me.value)) | |
96d7ed6c | 440 | _repr_pretty_ = _pp_str |
d7ab1bab | 441 | _augment(FE, _tmp) |
442 | ||
00401529 MW |
443 | ###-------------------------------------------------------------------------- |
444 | ### Elliptic curves. | |
d7ab1bab | 445 | |
446 | class _tmp: | |
447 | def __repr__(me): | |
330e6a74 | 448 | return '%s(%r, %s, %s)' % (_clsname(me), me.field, me.a, me.b) |
96d7ed6c | 449 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 450 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 451 | if cyclep: |
582568f1 | 452 | pp.text('...') |
96d7ed6c | 453 | else: |
96d7ed6c MW |
454 | pp.pretty(me.field); pp.text(','); pp.breakable() |
455 | pp.pretty(me.a); pp.text(','); pp.breakable() | |
456 | pp.pretty(me.b) | |
582568f1 | 457 | pp.end_group(ind, ')') |
d7ab1bab | 458 | def frombuf(me, s): |
459 | return ecpt.frombuf(me, s) | |
460 | def fromraw(me, s): | |
461 | return ecpt.fromraw(me, s) | |
462 | def pt(me, *args): | |
5f959e50 | 463 | return me(*args) |
d7ab1bab | 464 | _augment(ECCurve, _tmp) |
465 | ||
6d481bc6 MW |
466 | class _tmp: |
467 | def __hash__(me): | |
468 | h = 0x6751d341 | |
469 | h ^= hash(me.field) | |
470 | h ^= 2*hash(me.a) ^ 0xffffffff | |
471 | h ^= 5*hash(me.b) ^ 0xffffffff | |
472 | return h | |
473 | _augment(ECPrimeCurve, _tmp) | |
474 | ||
475 | class _tmp: | |
476 | def __hash__(me): | |
477 | h = 0x2ac203c5 | |
478 | h ^= hash(me.field) | |
479 | h ^= 2*hash(me.a) ^ 0xffffffff | |
480 | h ^= 5*hash(me.b) ^ 0xffffffff | |
481 | return h | |
482 | _augment(ECBinCurve, _tmp) | |
483 | ||
d7ab1bab | 484 | class _tmp: |
485 | def __repr__(me): | |
330e6a74 MW |
486 | if not me: return '%s()' % _clsname(me) |
487 | return '%s(%s, %s)' % (_clsname(me), me.ix, me.iy) | |
d7ab1bab | 488 | def __str__(me): |
489 | if not me: return 'inf' | |
490 | return '(%s, %s)' % (me.ix, me.iy) | |
96d7ed6c MW |
491 | def _repr_pretty_(me, pp, cyclep): |
492 | if cyclep: | |
493 | pp.text('...') | |
494 | elif not me: | |
495 | pp.text('inf') | |
496 | else: | |
582568f1 | 497 | ind = _pp_bgroup(pp, '(') |
96d7ed6c MW |
498 | pp.pretty(me.ix); pp.text(','); pp.breakable() |
499 | pp.pretty(me.iy) | |
582568f1 | 500 | pp.end_group(ind, ')') |
d7ab1bab | 501 | _augment(ECPt, _tmp) |
502 | ||
503 | class _tmp: | |
504 | def __repr__(me): | |
330e6a74 MW |
505 | return '%s(curve = %r, G = %r, r = %s, h = %s)' % \ |
506 | (_clsname(me), me.curve, me.G, me.r, me.h) | |
96d7ed6c | 507 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 508 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 509 | if cyclep: |
582568f1 | 510 | pp.text('...') |
96d7ed6c | 511 | else: |
96d7ed6c MW |
512 | _pp_kv(pp, 'curve', me.curve); pp.text(','); pp.breakable() |
513 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
514 | _pp_kv(pp, 'r', me.r); pp.text(','); pp.breakable() | |
515 | _pp_kv(pp, 'h', me.h) | |
582568f1 | 516 | pp.end_group(ind, ')') |
6d481bc6 MW |
517 | def __hash__(me): |
518 | h = 0x9bedb8de | |
519 | h ^= hash(me.curve) | |
520 | h ^= 2*hash(me.G) & 0xffffffff | |
521 | return h | |
d7ab1bab | 522 | def group(me): |
523 | return ECGroup(me) | |
524 | _augment(ECInfo, _tmp) | |
525 | ||
526 | class _tmp: | |
527 | def __repr__(me): | |
528 | if not me: return '%r()' % (me.curve) | |
529 | return '%r(%s, %s)' % (me.curve, me.x, me.y) | |
530 | def __str__(me): | |
531 | if not me: return 'inf' | |
532 | return '(%s, %s)' % (me.x, me.y) | |
7a7aa30e MW |
533 | def _repr_pretty_(me, pp, cyclep): |
534 | if cyclep: | |
535 | pp.text('...') | |
536 | elif not me: | |
537 | pp.text('inf') | |
538 | else: | |
539 | ind = _pp_bgroup(pp, '(') | |
540 | pp.pretty(me.x); pp.text(','); pp.breakable() | |
541 | pp.pretty(me.y) | |
542 | pp.end_group(ind, ')') | |
d7ab1bab | 543 | _augment(ECPtCurve, _tmp) |
544 | ||
00401529 MW |
545 | ###-------------------------------------------------------------------------- |
546 | ### Key sizes. | |
ed8cc62d | 547 | |
d7ab1bab | 548 | class _tmp: |
330e6a74 | 549 | def __repr__(me): return '%s(%d)' % (_clsname(me), me.default) |
d7ab1bab | 550 | def check(me, sz): return True |
551 | def best(me, sz): return sz | |
552 | _augment(KeySZAny, _tmp) | |
553 | ||
554 | class _tmp: | |
555 | def __repr__(me): | |
330e6a74 MW |
556 | return '%s(%d, %d, %d, %d)' % \ |
557 | (_clsname(me), me.default, me.min, me.max, me.mod) | |
96d7ed6c | 558 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 559 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 560 | if cyclep: |
582568f1 | 561 | pp.text('...') |
96d7ed6c | 562 | else: |
96d7ed6c MW |
563 | pp.pretty(me.default); pp.text(','); pp.breakable() |
564 | pp.pretty(me.min); pp.text(','); pp.breakable() | |
565 | pp.pretty(me.max); pp.text(','); pp.breakable() | |
566 | pp.pretty(me.mod) | |
582568f1 | 567 | pp.end_group(ind, ')') |
d7ab1bab | 568 | def check(me, sz): return me.min <= sz <= me.max and sz % me.mod == 0 |
569 | def best(me, sz): | |
570 | if sz < me.min: raise ValueError, 'key too small' | |
571 | elif sz > me.max: return me.max | |
572 | else: return sz - (sz % me.mod) | |
573 | _augment(KeySZRange, _tmp) | |
574 | ||
575 | class _tmp: | |
330e6a74 | 576 | def __repr__(me): return '%s(%d, %s)' % (_clsname(me), me.default, me.set) |
96d7ed6c | 577 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 578 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 579 | if cyclep: |
582568f1 | 580 | pp.text('...') |
96d7ed6c | 581 | else: |
96d7ed6c | 582 | pp.pretty(me.default); pp.text(','); pp.breakable() |
582568f1 | 583 | ind1 = _pp_bgroup(pp, '{') |
96d7ed6c | 584 | _pp_commas(pp, pp.pretty, me.set) |
582568f1 MW |
585 | pp.end_group(ind1, '}') |
586 | pp.end_group(ind, ')') | |
d7ab1bab | 587 | def check(me, sz): return sz in me.set |
588 | def best(me, sz): | |
589 | found = -1 | |
590 | for i in me.set: | |
591 | if found < i <= sz: found = i | |
592 | if found < 0: raise ValueError, 'key too small' | |
593 | return found | |
594 | _augment(KeySZSet, _tmp) | |
595 | ||
96d7ed6c MW |
596 | ###-------------------------------------------------------------------------- |
597 | ### Key data objects. | |
598 | ||
599 | class _tmp: | |
330e6a74 | 600 | def __repr__(me): return '%s(%r)' % (_clsname(me), me.name) |
96d7ed6c MW |
601 | _augment(KeyFile, _tmp) |
602 | ||
603 | class _tmp: | |
330e6a74 | 604 | def __repr__(me): return '%s(%r)' % (_clsname(me), me.fulltag) |
96d7ed6c MW |
605 | _augment(Key, _tmp) |
606 | ||
607 | class _tmp: | |
608 | def __repr__(me): | |
330e6a74 MW |
609 | return '%s({%s})' % (_clsname(me), |
610 | ', '.join(['%r: %r' % kv for kv in me.iteritems()])) | |
96d7ed6c | 611 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 612 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c MW |
613 | if cyclep: pp.text('...') |
614 | else: _pp_dict(pp, me.iteritems()) | |
582568f1 | 615 | pp.end_group(ind, ')') |
96d7ed6c MW |
616 | _augment(KeyAttributes, _tmp) |
617 | ||
618 | class _tmp: | |
849e8a20 | 619 | def __repr__(me): |
652e16ea MW |
620 | return '%s(%s, %r)' % (_clsname(me), |
621 | _repr_secret(me._guts(), | |
622 | not (me.flags & KF_NONSECRET)), | |
623 | me.writeflags(me.flags)) | |
96d7ed6c | 624 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 625 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 626 | if cyclep: |
582568f1 | 627 | pp.text('...') |
96d7ed6c | 628 | else: |
652e16ea MW |
629 | _pp_secret(pp, me._guts(), not (me.flags & KF_NONSECRET)) |
630 | pp.text(','); pp.breakable() | |
96d7ed6c | 631 | pp.pretty(me.writeflags(me.flags)) |
582568f1 | 632 | pp.end_group(ind, ')') |
849e8a20 MW |
633 | _augment(KeyData, _tmp) |
634 | ||
635 | class _tmp: | |
636 | def _guts(me): return me.bin | |
96d7ed6c MW |
637 | _augment(KeyDataBinary, _tmp) |
638 | ||
639 | class _tmp: | |
849e8a20 | 640 | def _guts(me): return me.ct |
96d7ed6c MW |
641 | _augment(KeyDataEncrypted, _tmp) |
642 | ||
643 | class _tmp: | |
849e8a20 | 644 | def _guts(me): return me.mp |
96d7ed6c MW |
645 | _augment(KeyDataMP, _tmp) |
646 | ||
647 | class _tmp: | |
849e8a20 | 648 | def _guts(me): return me.str |
96d7ed6c MW |
649 | _augment(KeyDataString, _tmp) |
650 | ||
651 | class _tmp: | |
849e8a20 | 652 | def _guts(me): return me.ecpt |
96d7ed6c MW |
653 | _augment(KeyDataECPt, _tmp) |
654 | ||
655 | class _tmp: | |
656 | def __repr__(me): | |
330e6a74 MW |
657 | return '%s({%s})' % (_clsname(me), |
658 | ', '.join(['%r: %r' % kv for kv in me.iteritems()])) | |
96d7ed6c | 659 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 660 | ind = _pp_bgroup_tyname(pp, me, '({ ') |
96d7ed6c MW |
661 | if cyclep: pp.text('...') |
662 | else: _pp_dict(pp, me.iteritems()) | |
582568f1 | 663 | pp.end_group(ind, ' })') |
96d7ed6c MW |
664 | _augment(KeyDataStructured, _tmp) |
665 | ||
00401529 MW |
666 | ###-------------------------------------------------------------------------- |
667 | ### Abstract groups. | |
ed8cc62d | 668 | |
d7ab1bab | 669 | class _tmp: |
670 | def __repr__(me): | |
330e6a74 | 671 | return '%s(p = %s, r = %s, g = %s)' % (_clsname(me), me.p, me.r, me.g) |
96d7ed6c | 672 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 673 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 674 | if cyclep: |
582568f1 | 675 | pp.text('...') |
96d7ed6c | 676 | else: |
96d7ed6c MW |
677 | _pp_kv(pp, 'p', me.p); pp.text(','); pp.breakable() |
678 | _pp_kv(pp, 'r', me.r); pp.text(','); pp.breakable() | |
679 | _pp_kv(pp, 'g', me.g) | |
582568f1 | 680 | pp.end_group(ind, ')') |
d7ab1bab | 681 | _augment(FGInfo, _tmp) |
682 | ||
683 | class _tmp: | |
684 | def group(me): return PrimeGroup(me) | |
685 | _augment(DHInfo, _tmp) | |
686 | ||
687 | class _tmp: | |
688 | def group(me): return BinGroup(me) | |
689 | _augment(BinDHInfo, _tmp) | |
690 | ||
691 | class _tmp: | |
692 | def __repr__(me): | |
330e6a74 | 693 | return '%s(%r)' % (_clsname(me), me.info) |
99d932fe MW |
694 | def _repr_pretty_(me, pp, cyclep): |
695 | ind = _pp_bgroup_tyname(pp, me) | |
696 | if cyclep: pp.text('...') | |
697 | else: pp.pretty(me.info) | |
698 | pp.end_group(ind, ')') | |
d7ab1bab | 699 | _augment(Group, _tmp) |
700 | ||
6d481bc6 MW |
701 | class _tmp: |
702 | def __hash__(me): | |
703 | info = me.info | |
704 | h = 0xbce3cfe6 | |
705 | h ^= hash(info.p) | |
706 | h ^= 2*hash(info.r) & 0xffffffff | |
707 | h ^= 5*hash(info.g) & 0xffffffff | |
708 | return h | |
d7012c2b | 709 | def _get_geval(me, x): return MP(x) |
6d481bc6 MW |
710 | _augment(PrimeGroup, _tmp) |
711 | ||
712 | class _tmp: | |
713 | def __hash__(me): | |
714 | info = me.info | |
715 | h = 0x80695949 | |
716 | h ^= hash(info.p) | |
717 | h ^= 2*hash(info.r) & 0xffffffff | |
718 | h ^= 5*hash(info.g) & 0xffffffff | |
719 | return h | |
d7012c2b | 720 | def _get_geval(me, x): return GF(x) |
6d481bc6 MW |
721 | _augment(BinGroup, _tmp) |
722 | ||
723 | class _tmp: | |
724 | def __hash__(me): return 0x0ec23dab ^ hash(me.info) | |
d7012c2b | 725 | def _get_geval(me, x): return x.toec() |
6d481bc6 MW |
726 | _augment(ECGroup, _tmp) |
727 | ||
d7ab1bab | 728 | class _tmp: |
729 | def __repr__(me): | |
730 | return '%r(%r)' % (me.group, str(me)) | |
d7012c2b MW |
731 | def _repr_pretty_(me, pp, cyclep): |
732 | pp.pretty(type(me)._get_geval(me)) | |
d7ab1bab | 733 | _augment(GE, _tmp) |
734 | ||
00401529 MW |
735 | ###-------------------------------------------------------------------------- |
736 | ### RSA encoding techniques. | |
ed8cc62d MW |
737 | |
738 | class PKCS1Crypt (object): | |
d7ab1bab | 739 | def __init__(me, ep = '', rng = rand): |
740 | me.ep = ep | |
741 | me.rng = rng | |
742 | def encode(me, msg, nbits): | |
743 | return _base._p1crypt_encode(msg, nbits, me.ep, me.rng) | |
744 | def decode(me, ct, nbits): | |
745 | return _base._p1crypt_decode(ct, nbits, me.ep, me.rng) | |
746 | ||
ed8cc62d | 747 | class PKCS1Sig (object): |
d7ab1bab | 748 | def __init__(me, ep = '', rng = rand): |
749 | me.ep = ep | |
750 | me.rng = rng | |
751 | def encode(me, msg, nbits): | |
752 | return _base._p1sig_encode(msg, nbits, me.ep, me.rng) | |
753 | def decode(me, msg, sig, nbits): | |
754 | return _base._p1sig_decode(msg, sig, nbits, me.ep, me.rng) | |
755 | ||
ed8cc62d | 756 | class OAEP (object): |
d7ab1bab | 757 | def __init__(me, mgf = sha_mgf, hash = sha, ep = '', rng = rand): |
758 | me.mgf = mgf | |
759 | me.hash = hash | |
760 | me.ep = ep | |
761 | me.rng = rng | |
762 | def encode(me, msg, nbits): | |
763 | return _base._oaep_encode(msg, nbits, me.mgf, me.hash, me.ep, me.rng) | |
764 | def decode(me, ct, nbits): | |
765 | return _base._oaep_decode(ct, nbits, me.mgf, me.hash, me.ep, me.rng) | |
766 | ||
ed8cc62d | 767 | class PSS (object): |
d7ab1bab | 768 | def __init__(me, mgf = sha_mgf, hash = sha, saltsz = None, rng = rand): |
769 | me.mgf = mgf | |
770 | me.hash = hash | |
771 | if saltsz is None: | |
772 | saltsz = hash.hashsz | |
773 | me.saltsz = saltsz | |
774 | me.rng = rng | |
775 | def encode(me, msg, nbits): | |
776 | return _base._pss_encode(msg, nbits, me.mgf, me.hash, me.saltsz, me.rng) | |
777 | def decode(me, msg, sig, nbits): | |
778 | return _base._pss_decode(msg, sig, nbits, | |
00401529 | 779 | me.mgf, me.hash, me.saltsz, me.rng) |
d7ab1bab | 780 | |
781 | class _tmp: | |
782 | def encrypt(me, msg, enc): | |
783 | return me.pubop(enc.encode(msg, me.n.nbits)) | |
784 | def verify(me, msg, sig, enc): | |
785 | if msg is None: return enc.decode(msg, me.pubop(sig), me.n.nbits) | |
786 | try: | |
787 | x = enc.decode(msg, me.pubop(sig), me.n.nbits) | |
788 | return x is None or x == msg | |
789 | except ValueError: | |
b2687a0a | 790 | return False |
bbd94558 MW |
791 | def __repr__(me): |
792 | return '%s(n = %r, e = %r)' % (_clsname(me), me.n, me.e) | |
793 | def _repr_pretty_(me, pp, cyclep): | |
794 | ind = _pp_bgroup_tyname(pp, me) | |
795 | if cyclep: | |
796 | pp.text('...') | |
797 | else: | |
798 | _pp_kv(pp, 'n', me.n); pp.text(','); pp.breakable() | |
799 | _pp_kv(pp, 'e', me.e) | |
800 | pp.end_group(ind, ')') | |
d7ab1bab | 801 | _augment(RSAPub, _tmp) |
802 | ||
803 | class _tmp: | |
804 | def decrypt(me, ct, enc): return enc.decode(me.privop(ct), me.n.nbits) | |
805 | def sign(me, msg, enc): return me.privop(enc.encode(msg, me.n.nbits)) | |
bbd94558 MW |
806 | def __repr__(me): |
807 | return '%s(n = %r, e = %r, d = %s, ' \ | |
808 | 'p = %s, q = %s, dp = %s, dq = %s, q_inv = %s)' % \ | |
809 | (_clsname(me), me.n, me.e, | |
810 | _repr_secret(me.d), _repr_secret(me.p), _repr_secret(me.q), | |
811 | _repr_secret(me.dp), _repr_secret(me.dq), _repr_secret(me.q_inv)) | |
812 | def _repr_pretty_(me, pp, cyclep): | |
813 | ind = _pp_bgroup_tyname(pp, me) | |
814 | if cyclep: | |
815 | pp.text('...') | |
816 | else: | |
817 | _pp_kv(pp, 'n', me.n); pp.text(','); pp.breakable() | |
818 | _pp_kv(pp, 'e', me.e); pp.text(','); pp.breakable() | |
819 | _pp_kv(pp, 'd', me.d, secretp = True); pp.text(','); pp.breakable() | |
820 | _pp_kv(pp, 'p', me.p, secretp = True); pp.text(','); pp.breakable() | |
821 | _pp_kv(pp, 'q', me.q, secretp = True); pp.text(','); pp.breakable() | |
822 | _pp_kv(pp, 'dp', me.dp, secretp = True); pp.text(','); pp.breakable() | |
823 | _pp_kv(pp, 'dq', me.dq, secretp = True); pp.text(','); pp.breakable() | |
824 | _pp_kv(pp, 'q_inv', me.q_inv, secretp = True) | |
825 | pp.end_group(ind, ')') | |
d7ab1bab | 826 | _augment(RSAPriv, _tmp) |
827 | ||
bbd94558 MW |
828 | ###-------------------------------------------------------------------------- |
829 | ### DSA and related schemes. | |
830 | ||
831 | class _tmp: | |
1b3b79da MW |
832 | def __repr__(me): return '%s(G = %r, p = %r, hash = %r)' % \ |
833 | (_clsname(me), me.G, me.p, me.hash) | |
bbd94558 MW |
834 | def _repr_pretty_(me, pp, cyclep): |
835 | ind = _pp_bgroup_tyname(pp, me) | |
836 | if cyclep: | |
837 | pp.text('...') | |
838 | else: | |
839 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
1b3b79da MW |
840 | _pp_kv(pp, 'p', me.p); pp.text(','); pp.breakable() |
841 | _pp_kv(pp, 'hash', me.hash) | |
bbd94558 MW |
842 | pp.end_group(ind, ')') |
843 | _augment(DSAPub, _tmp) | |
844 | _augment(KCDSAPub, _tmp) | |
845 | ||
846 | class _tmp: | |
1b3b79da MW |
847 | def __repr__(me): return '%s(G = %r, u = %s, p = %r, hash = %r)' % \ |
848 | (_clsname(me), me.G, _repr_secret(me.u), me.p, me.hash) | |
bbd94558 MW |
849 | def _repr_pretty_(me, pp, cyclep): |
850 | ind = _pp_bgroup_tyname(pp, me) | |
851 | if cyclep: | |
852 | pp.text('...') | |
853 | else: | |
854 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
855 | _pp_kv(pp, 'u', me.u, True); pp.text(','); pp.breakable() | |
1b3b79da MW |
856 | _pp_kv(pp, 'p', me.p); pp.text(','); pp.breakable() |
857 | _pp_kv(pp, 'hash', me.hash) | |
bbd94558 MW |
858 | pp.end_group(ind, ')') |
859 | _augment(DSAPriv, _tmp) | |
860 | _augment(KCDSAPriv, _tmp) | |
861 | ||
848ba392 | 862 | ###-------------------------------------------------------------------------- |
eb8aa4ec | 863 | ### Bernstein's elliptic curve crypto and related schemes. |
848ba392 | 864 | |
8e6f45a3 MW |
865 | X25519_BASE = MP(9).storel(32) |
866 | X448_BASE = MP(5).storel(56) | |
eb8aa4ec | 867 | |
5a8b43b3 | 868 | Z128 = ByteString.zero(16) |
848ba392 | 869 | |
925aa45b | 870 | class _BasePub (object): |
f40e338b | 871 | def __init__(me, pub, *args, **kw): |
925aa45b MW |
872 | if not me._PUBSZ.check(len(pub)): raise ValueError, 'bad public key' |
873 | super(_BasePub, me).__init__(*args, **kw) | |
848ba392 | 874 | me.pub = pub |
bbd94558 | 875 | def __repr__(me): return '%s(pub = %r)' % (_clsname(me), me.pub) |
925aa45b | 876 | def _pp(me, pp): _pp_kv(pp, 'pub', me.pub) |
bbd94558 MW |
877 | def _repr_pretty_(me, pp, cyclep): |
878 | ind = _pp_bgroup_tyname(pp, me) | |
925aa45b MW |
879 | if cyclep: pp.text('...') |
880 | else: me._pp(pp) | |
bbd94558 | 881 | pp.end_group(ind, ')') |
848ba392 | 882 | |
925aa45b | 883 | class _BasePriv (object): |
f40e338b | 884 | def __init__(me, priv, pub = None, *args, **kw): |
925aa45b MW |
885 | if not me._KEYSZ.check(len(priv)): raise ValueError, 'bad private key' |
886 | if pub is None: pub = me._pubkey(priv) | |
887 | super(_BasePriv, me).__init__(pub = pub, *args, **kw) | |
848ba392 | 888 | me.priv = priv |
925aa45b MW |
889 | @classmethod |
890 | def generate(cls, rng = rand): | |
891 | return cls(rng.block(cls._KEYSZ.default)) | |
892 | def __repr__(me): | |
893 | return '%s(priv = %d, pub = %r)' % \ | |
894 | (_clsname(me), _repr_secret(me.priv), me.pub) | |
895 | def _pp(me, pp): | |
896 | _pp_kv(pp, 'priv', me.priv, secretp = True); pp.text(','); pp.breakable() | |
897 | super(_BasePriv, me)._pp(pp) | |
898 | ||
899 | class _XDHPub (_BasePub): pass | |
900 | ||
901 | class _XDHPriv (_BasePriv): | |
902 | def _pubkey(me, priv): return me._op(priv, me._BASE) | |
848ba392 | 903 | def agree(me, you): return me._op(me.priv, you.pub) |
925aa45b MW |
904 | def boxkey(me, recip): return me._hashkey(me.agree(recip)) |
905 | def box(me, recip, n, m): return secret_box(me.boxkey(recip), n, m) | |
906 | def unbox(me, recip, n, c): return secret_unbox(me.boxkey(recip), n, c) | |
848ba392 | 907 | |
925aa45b MW |
908 | class X25519Pub (_XDHPub): |
909 | _PUBSZ = KeySZSet(X25519_PUBSZ) | |
848ba392 MW |
910 | _BASE = X25519_BASE |
911 | ||
925aa45b MW |
912 | class X25519Priv (_XDHPriv, X25519Pub): |
913 | _KEYSZ = KeySZSet(X25519_KEYSZ) | |
848ba392 MW |
914 | def _op(me, k, X): return x25519(k, X) |
915 | def _hashkey(me, z): return hsalsa20_prf(z, Z128) | |
916 | ||
925aa45b MW |
917 | class X448Pub (_XDHPub): |
918 | _PUBSZ = KeySZSet(X448_PUBSZ) | |
eb8aa4ec MW |
919 | _BASE = X448_BASE |
920 | ||
925aa45b MW |
921 | class X448Priv (_XDHPriv, X448Pub): |
922 | _KEYSZ = KeySZSet(X448_KEYSZ) | |
eb8aa4ec | 923 | def _op(me, k, X): return x448(k, X) |
f1b0cf0d | 924 | def _hashkey(me, z): return Shake256().hash(z).done(salsa20.keysz.default) |
eb8aa4ec | 925 | |
925aa45b | 926 | class _EdDSAPub (_BasePub): |
058f0a00 MW |
927 | def beginhash(me): return me._HASH() |
928 | def endhash(me, h): return h.done() | |
925aa45b MW |
929 | |
930 | class _EdDSAPriv (_BasePriv, _EdDSAPub): | |
931 | pass | |
932 | ||
933 | class Ed25519Pub (_EdDSAPub): | |
934 | _PUBSZ = KeySZSet(ED25519_PUBSZ) | |
058f0a00 | 935 | _HASH = sha512 |
5c4c0231 MW |
936 | def verify(me, msg, sig, **kw): |
937 | return ed25519_verify(me.pub, msg, sig, **kw) | |
dafb2da4 | 938 | |
925aa45b MW |
939 | class Ed25519Priv (_EdDSAPriv, Ed25519Pub): |
940 | _KEYSZ = KeySZAny(ED25519_KEYSZ) | |
941 | def _pubkey(me, priv): return ed25519_pubkey(priv) | |
5c4c0231 MW |
942 | def sign(me, msg, **kw): |
943 | return ed25519_sign(me.priv, msg, pub = me.pub, **kw) | |
dafb2da4 | 944 | |
eee202c3 MW |
945 | class Ed448Pub (_EdDSAPub): |
946 | _PUBSZ = KeySZSet(ED448_PUBSZ) | |
947 | _HASH = shake256 | |
948 | def verify(me, msg, sig, **kw): | |
949 | return ed448_verify(me.pub, msg, sig, **kw) | |
950 | ||
951 | class Ed448Priv (_EdDSAPriv, Ed448Pub): | |
952 | _KEYSZ = KeySZAny(ED448_KEYSZ) | |
953 | def _pubkey(me, priv): return ed448_pubkey(priv) | |
954 | def sign(me, msg, **kw): | |
955 | return ed448_sign(me.priv, msg, pub = me.pub, **kw) | |
956 | ||
00401529 MW |
957 | ###-------------------------------------------------------------------------- |
958 | ### Built-in named curves and prime groups. | |
ed8cc62d MW |
959 | |
960 | class _groupmap (object): | |
961 | def __init__(me, map, nth): | |
962 | me.map = map | |
963 | me.nth = nth | |
1b61856d MW |
964 | me._n = max(map.values()) + 1 |
965 | me.i = me._n*[None] | |
ed8cc62d | 966 | def __repr__(me): |
96d7ed6c MW |
967 | return '{%s}' % ', '.join(['%r: %r' % kv for kv in me.iteritems()]) |
968 | def _repr_pretty_(me, pp, cyclep): | |
582568f1 MW |
969 | ind = _pp_bgroup(pp, '{ ') |
970 | if cyclep: pp.text('...') | |
971 | else: _pp_dict(pp, me.iteritems()) | |
972 | pp.end_group(ind, ' }') | |
1b61856d MW |
973 | def __len__(me): |
974 | return me._n | |
ed8cc62d MW |
975 | def __contains__(me, k): |
976 | return k in me.map | |
977 | def __getitem__(me, k): | |
978 | i = me.map[k] | |
979 | if me.i[i] is None: | |
980 | me.i[i] = me.nth(i) | |
981 | return me.i[i] | |
982 | def __setitem__(me, k, v): | |
983 | raise TypeError, "immutable object" | |
984 | def __iter__(me): | |
985 | return iter(me.map) | |
96851f5d MW |
986 | def iterkeys(me): |
987 | return iter(me.map) | |
988 | def itervalues(me): | |
989 | for k in me: | |
990 | yield me[k] | |
991 | def iteritems(me): | |
992 | for k in me: | |
993 | yield k, me[k] | |
ed8cc62d MW |
994 | def keys(me): |
995 | return [k for k in me] | |
996 | def values(me): | |
997 | return [me[k] for k in me] | |
96851f5d MW |
998 | def items(me): |
999 | return [(k, me[k]) for k in me] | |
ed8cc62d MW |
1000 | eccurves = _groupmap(_base._eccurves, ECInfo._curven) |
1001 | primegroups = _groupmap(_base._pgroups, DHInfo._groupn) | |
1002 | bingroups = _groupmap(_base._bingroups, BinDHInfo._groupn) | |
1003 | ||
00401529 MW |
1004 | ###-------------------------------------------------------------------------- |
1005 | ### Prime number generation. | |
ed8cc62d MW |
1006 | |
1007 | class PrimeGenEventHandler (object): | |
1008 | def pg_begin(me, ev): | |
1009 | return me.pg_try(ev) | |
1010 | def pg_done(me, ev): | |
1011 | return PGEN_DONE | |
1012 | def pg_abort(me, ev): | |
1013 | return PGEN_TRY | |
1014 | def pg_fail(me, ev): | |
1015 | return PGEN_TRY | |
1016 | def pg_pass(me, ev): | |
1017 | return PGEN_TRY | |
d7ab1bab | 1018 | |
1019 | class SophieGermainStepJump (object): | |
1020 | def pg_begin(me, ev): | |
1021 | me.lf = PrimeFilter(ev.x) | |
1022 | me.hf = me.lf.muladd(2, 1) | |
1023 | return me.cont(ev) | |
1024 | def pg_try(me, ev): | |
1025 | me.step() | |
1026 | return me.cont(ev) | |
1027 | def cont(me, ev): | |
1028 | while me.lf.status == PGEN_FAIL or me.hf.status == PGEN_FAIL: | |
1029 | me.step() | |
1030 | if me.lf.status == PGEN_ABORT or me.hf.status == PGEN_ABORT: | |
1031 | return PGEN_ABORT | |
1032 | ev.x = me.lf.x | |
1033 | if me.lf.status == PGEN_DONE and me.hf.status == PGEN_DONE: | |
1034 | return PGEN_DONE | |
1035 | return PGEN_TRY | |
1036 | def pg_done(me, ev): | |
1037 | del me.lf | |
1038 | del me.hf | |
1039 | ||
1040 | class SophieGermainStepper (SophieGermainStepJump): | |
1041 | def __init__(me, step): | |
1042 | me.lstep = step; | |
1043 | me.hstep = 2 * step | |
1044 | def step(me): | |
1045 | me.lf.step(me.lstep) | |
1046 | me.hf.step(me.hstep) | |
1047 | ||
1048 | class SophieGermainJumper (SophieGermainStepJump): | |
1049 | def __init__(me, jump): | |
1050 | me.ljump = PrimeFilter(jump); | |
1051 | me.hjump = me.ljump.muladd(2, 0) | |
1052 | def step(me): | |
1053 | me.lf.jump(me.ljump) | |
1054 | me.hf.jump(me.hjump) | |
1055 | def pg_done(me, ev): | |
1056 | del me.ljump | |
1057 | del me.hjump | |
1058 | SophieGermainStepJump.pg_done(me, ev) | |
1059 | ||
1060 | class SophieGermainTester (object): | |
1061 | def __init__(me): | |
1062 | pass | |
1063 | def pg_begin(me, ev): | |
1064 | me.lr = RabinMiller(ev.x) | |
1065 | me.hr = RabinMiller(2 * ev.x + 1) | |
1066 | def pg_try(me, ev): | |
1067 | lst = me.lr.test(ev.rng.range(me.lr.x)) | |
1068 | if lst != PGEN_PASS and lst != PGEN_DONE: | |
1069 | return lst | |
1070 | rst = me.hr.test(ev.rng.range(me.hr.x)) | |
1071 | if rst != PGEN_PASS and rst != PGEN_DONE: | |
1072 | return rst | |
1073 | if lst == PGEN_DONE and rst == PGEN_DONE: | |
1074 | return PGEN_DONE | |
1075 | return PGEN_PASS | |
1076 | def pg_done(me, ev): | |
1077 | del me.lr | |
1078 | del me.hr | |
1079 | ||
d7ab1bab | 1080 | class PrimitiveStepper (PrimeGenEventHandler): |
1081 | def __init__(me): | |
1082 | pass | |
1083 | def pg_try(me, ev): | |
1084 | ev.x = me.i.next() | |
1085 | return PGEN_TRY | |
1086 | def pg_begin(me, ev): | |
1087 | me.i = iter(smallprimes) | |
1088 | return me.pg_try(ev) | |
1089 | ||
1090 | class PrimitiveTester (PrimeGenEventHandler): | |
1091 | def __init__(me, mod, hh = [], exp = None): | |
1092 | me.mod = MPMont(mod) | |
1093 | me.exp = exp | |
1094 | me.hh = hh | |
1095 | def pg_try(me, ev): | |
1096 | x = ev.x | |
1097 | if me.exp is not None: | |
1098 | x = me.mod.exp(x, me.exp) | |
1099 | if x == 1: return PGEN_FAIL | |
1100 | for h in me.hh: | |
1101 | if me.mod.exp(x, h) == 1: return PGEN_FAIL | |
1102 | ev.x = x | |
1103 | return PGEN_DONE | |
1104 | ||
1105 | class SimulStepper (PrimeGenEventHandler): | |
1106 | def __init__(me, mul = 2, add = 1, step = 2): | |
1107 | me.step = step | |
1108 | me.mul = mul | |
1109 | me.add = add | |
1110 | def _stepfn(me, step): | |
1111 | if step <= 0: | |
1112 | raise ValueError, 'step must be positive' | |
1113 | if step <= MPW_MAX: | |
1114 | return lambda f: f.step(step) | |
1115 | j = PrimeFilter(step) | |
1116 | return lambda f: f.jump(j) | |
1117 | def pg_begin(me, ev): | |
1118 | x = ev.x | |
1119 | me.lf = PrimeFilter(x) | |
1120 | me.hf = PrimeFilter(x * me.mul + me.add) | |
1121 | me.lstep = me._stepfn(me.step) | |
1122 | me.hstep = me._stepfn(me.step * me.mul) | |
1123 | SimulStepper._cont(me, ev) | |
1124 | def pg_try(me, ev): | |
1125 | me._step() | |
1126 | me._cont(ev) | |
1127 | def _step(me): | |
1128 | me.lstep(me.lf) | |
1129 | me.hstep(me.hf) | |
1130 | def _cont(me, ev): | |
1131 | while me.lf.status == PGEN_FAIL or me.hf.status == PGEN_FAIL: | |
1132 | me._step() | |
1133 | if me.lf.status == PGEN_ABORT or me.hf.status == PGEN_ABORT: | |
1134 | return PGEN_ABORT | |
1135 | ev.x = me.lf.x | |
1136 | if me.lf.status == PGEN_DONE and me.hf.status == PGEN_DONE: | |
1137 | return PGEN_DONE | |
1138 | return PGEN_TRY | |
1139 | def pg_done(me, ev): | |
1140 | del me.lf | |
1141 | del me.hf | |
1142 | del me.lstep | |
1143 | del me.hstep | |
1144 | ||
1145 | class SimulTester (PrimeGenEventHandler): | |
1146 | def __init__(me, mul = 2, add = 1): | |
1147 | me.mul = mul | |
1148 | me.add = add | |
1149 | def pg_begin(me, ev): | |
1150 | x = ev.x | |
1151 | me.lr = RabinMiller(x) | |
1152 | me.hr = RabinMiller(x * me.mul + me.add) | |
1153 | def pg_try(me, ev): | |
1154 | lst = me.lr.test(ev.rng.range(me.lr.x)) | |
1155 | if lst != PGEN_PASS and lst != PGEN_DONE: | |
1156 | return lst | |
1157 | rst = me.hr.test(ev.rng.range(me.hr.x)) | |
1158 | if rst != PGEN_PASS and rst != PGEN_DONE: | |
1159 | return rst | |
1160 | if lst == PGEN_DONE and rst == PGEN_DONE: | |
1161 | return PGEN_DONE | |
1162 | return PGEN_PASS | |
1163 | def pg_done(me, ev): | |
1164 | del me.lr | |
1165 | del me.hr | |
1166 | ||
1167 | def sgprime(start, step = 2, name = 'p', event = pgen_nullev, nsteps = 0): | |
1168 | start = MP(start) | |
1169 | return pgen(start, name, SimulStepper(step = step), SimulTester(), event, | |
00401529 | 1170 | nsteps, RabinMiller.iters(start.nbits)) |
d7ab1bab | 1171 | |
1172 | def findprimitive(mod, hh = [], exp = None, name = 'g', event = pgen_nullev): | |
1173 | return pgen(0, name, PrimitiveStepper(), PrimitiveTester(mod, hh, exp), | |
00401529 | 1174 | event, 0, 1) |
d7ab1bab | 1175 | |
1176 | def kcdsaprime(pbits, qbits, rng = rand, | |
00401529 | 1177 | event = pgen_nullev, name = 'p', nsteps = 0): |
d7ab1bab | 1178 | hbits = pbits - qbits |
1179 | h = pgen(rng.mp(hbits, 1), name + ' [h]', | |
00401529 MW |
1180 | PrimeGenStepper(2), PrimeGenTester(), |
1181 | event, nsteps, RabinMiller.iters(hbits)) | |
d7ab1bab | 1182 | q = pgen(rng.mp(qbits, 1), name, SimulStepper(2 * h, 1, 2), |
00401529 | 1183 | SimulTester(2 * h, 1), event, nsteps, RabinMiller.iters(qbits)) |
d7ab1bab | 1184 | p = 2 * q * h + 1 |
1185 | return p, q, h | |
1186 | ||
1187 | #----- That's all, folks ---------------------------------------------------- |