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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 |
8854bd74 MW |
30 | try: import DLFCN as _dlfcn |
31 | except ImportError: _dlfcn = None | |
a3ae4a9f | 32 | import os as _os |
6bd22b53 | 33 | from struct import pack as _pack |
378ceeef MW |
34 | import sys as _sys |
35 | import types as _types | |
36 | ||
37 | ###-------------------------------------------------------------------------- | |
38 | ### Import the main C extension module. | |
39 | ||
a3ae4a9f MW |
40 | try: |
41 | _dlflags = _odlflags = _sys.getdlopenflags() | |
42 | except AttributeError: | |
43 | _dlflags = _odlflags = -1 | |
44 | ||
45 | ## Set the `deep binding' flag. Python has its own different MD5 | |
46 | ## implementation, and some distributions export `md5_init' and friends so | |
47 | ## they override our versions, which doesn't end well. Figure out how to | |
48 | ## turn this flag on so we don't have the problem. | |
49 | if _dlflags >= 0: | |
50 | try: _dlflags |= _dlfcn.RTLD_DEEPBIND | |
51 | except AttributeError: | |
52 | try: _dlflags |= _os.RTLD_DEEPBIND | |
53 | except AttributeError: | |
54 | if _os.uname()[0] == 'Linux': _dlflags |= 8 # magic knowledge | |
55 | else: pass # can't do this. | |
56 | _sys.setdlopenflags(_dlflags) | |
57 | ||
f7623015 MW |
58 | if _sys.version_info >= (3,): from . import _base |
59 | else: import _base | |
46e6ad89 | 60 | |
a3ae4a9f MW |
61 | if _odlflags >= 0: |
62 | _sys.setdlopenflags(_odlflags) | |
63 | ||
64 | del _dlflags, _odlflags | |
65 | ||
00401529 MW |
66 | ###-------------------------------------------------------------------------- |
67 | ### Basic stuff. | |
ed8cc62d | 68 | |
c04b289c MW |
69 | ## For the benefit of the default keyreporter, we need the program name. |
70 | _base._ego(_sys.argv[0]) | |
d7ab1bab | 71 | |
930d78e3 MW |
72 | ## Register our module. |
73 | _base._set_home_module(_sys.modules[__name__]) | |
74 | def default_lostexchook(why, ty, val, tb): | |
75 | """`catacomb.lostexchook(WHY, TY, VAL, TB)' reports lost exceptions.""" | |
76 | _sys.stderr.write("\n\n!!! LOST EXCEPTION: %s\n" % why) | |
77 | _sys.excepthook(ty, val, tb) | |
78 | _sys.stderr.write("\n") | |
79 | lostexchook = default_lostexchook | |
80 | ||
467c2619 | 81 | ## Text/binary conversions. |
f7623015 MW |
82 | if _sys.version_info >= (3,): |
83 | def _bin(s): return s.encode('iso8859-1') | |
84 | else: | |
85 | def _bin(s): return s | |
467c2619 | 86 | |
d6542364 | 87 | ## Iterating over dictionaries. |
f7623015 MW |
88 | if _sys.version_info >= (3,): |
89 | def _iteritems(dict): return dict.items() | |
90 | def _itervalues(dict): return dict.values() | |
91 | else: | |
92 | def _iteritems(dict): return dict.iteritems() | |
93 | def _itervalues(dict): return dict.itervalues() | |
d6542364 | 94 | |
77535854 | 95 | ## The built-in bignum type. |
f7623015 MW |
96 | try: long |
97 | except NameError: _long = int | |
98 | else: _long = long | |
77535854 | 99 | |
837fa485 MW |
100 | ## How to fix a name back into the right identifier. Alas, the rules are not |
101 | ## consistent. | |
102 | def _fixname(name): | |
103 | ||
104 | ## Hyphens consistently become underscores. | |
105 | name = name.replace('-', '_') | |
106 | ||
107 | ## But slashes might become underscores or just vanish. | |
3e80d327 | 108 | if name.startswith('salsa20'): name = name.replace('/', '') |
837fa485 MW |
109 | else: name = name.replace('/', '_') |
110 | ||
111 | ## Done. | |
112 | return name | |
113 | ||
ed8cc62d MW |
114 | ## Initialize the module. Drag in the static methods of the various |
115 | ## classes; create names for the various known crypto algorithms. | |
d7ab1bab | 116 | def _init(): |
117 | d = globals() | |
118 | b = _base.__dict__; | |
119 | for i in b: | |
120 | if i[0] != '_': | |
121 | d[i] = b[i]; | |
bebf03ab | 122 | for i in [gcciphers, gcaeads, gchashes, gcmacs, gcprps]: |
d6542364 | 123 | for c in _itervalues(i): |
837fa485 | 124 | d[_fixname(c.name)] = c |
d6542364 | 125 | for c in _itervalues(gccrands): |
837fa485 | 126 | d[_fixname(c.name + 'rand')] = c |
d7ab1bab | 127 | _init() |
128 | ||
ed8cc62d MW |
129 | ## A handy function for our work: add the methods of a named class to an |
130 | ## existing class. This is how we write the Python-implemented parts of our | |
131 | ## mostly-C types. | |
d7ab1bab | 132 | def _augment(c, cc): |
133 | for i in cc.__dict__: | |
134 | a = cc.__dict__[i] | |
135 | if type(a) is _types.MethodType: | |
136 | a = a.im_func | |
137 | elif type(a) not in (_types.FunctionType, staticmethod, classmethod): | |
138 | continue | |
139 | setattr(c, i, a) | |
140 | ||
ed8cc62d MW |
141 | ## Parsing functions tend to return the object parsed and the remainder of |
142 | ## the input. This checks that the remainder is input and, if so, returns | |
143 | ## just the object. | |
144 | def _checkend(r): | |
145 | x, rest = r | |
146 | if rest != '': | |
1c7419c9 | 147 | raise SyntaxError('junk at end of string') |
ed8cc62d MW |
148 | return x |
149 | ||
96d7ed6c | 150 | ## Some pretty-printing utilities. |
652e16ea | 151 | PRINT_SECRETS = False |
330e6a74 | 152 | def _clsname(me): return type(me).__name__ |
652e16ea MW |
153 | def _repr_secret(thing, secretp = True): |
154 | if not secretp or PRINT_SECRETS: return repr(thing) | |
155 | else: return '#<SECRET>' | |
96d7ed6c | 156 | def _pp_str(me, pp, cyclep): pp.text(cyclep and '...' or str(me)) |
652e16ea MW |
157 | def _pp_secret(pp, thing, secretp = True): |
158 | if not secretp or PRINT_SECRETS: pp.pretty(thing) | |
159 | else: pp.text('#<SECRET>') | |
582568f1 MW |
160 | def _pp_bgroup(pp, text): |
161 | ind = len(text) | |
162 | pp.begin_group(ind, text) | |
163 | return ind | |
164 | def _pp_bgroup_tyname(pp, obj, open = '('): | |
330e6a74 | 165 | return _pp_bgroup(pp, _clsname(obj) + open) |
652e16ea | 166 | def _pp_kv(pp, k, v, secretp = False): |
582568f1 | 167 | ind = _pp_bgroup(pp, k + ' = ') |
652e16ea | 168 | _pp_secret(pp, v, secretp) |
96d7ed6c MW |
169 | pp.end_group(ind, '') |
170 | def _pp_commas(pp, printfn, items): | |
171 | firstp = True | |
172 | for i in items: | |
173 | if firstp: firstp = False | |
174 | else: pp.text(','); pp.breakable() | |
175 | printfn(i) | |
176 | def _pp_dict(pp, items): | |
85866c8a MW |
177 | def p(kv): |
178 | k, v = kv | |
582568f1 | 179 | pp.begin_group(0) |
96d7ed6c MW |
180 | pp.pretty(k) |
181 | pp.text(':') | |
582568f1 | 182 | pp.begin_group(2) |
96d7ed6c MW |
183 | pp.breakable() |
184 | pp.pretty(v) | |
582568f1 MW |
185 | pp.end_group(2) |
186 | pp.end_group(0) | |
96d7ed6c MW |
187 | _pp_commas(pp, p, items) |
188 | ||
00401529 | 189 | ###-------------------------------------------------------------------------- |
f7623015 MW |
190 | ### Mappings. |
191 | ||
192 | if _sys.version_info >= (3,): | |
193 | class _tmp: | |
194 | def __str__(me): return '%s(%r)' % (type(me).__name__, list(me)) | |
195 | __repr__ = __str__ | |
196 | def _repr_pretty_(me, pp, cyclep): | |
197 | ind = _pp_bgroup_tyname(pp, me, '([') | |
198 | _pp_commas(pp, pp.pretty, me) | |
199 | pp.end_group(ind, '])') | |
200 | _augment(_base._KeyView, _tmp) | |
201 | _augment(_base._ValueView, _tmp) | |
202 | _augment(_base._ItemView, _tmp) | |
203 | ||
204 | ###-------------------------------------------------------------------------- | |
00401529 | 205 | ### Bytestrings. |
ed8cc62d | 206 | |
d7ab1bab | 207 | class _tmp: |
208 | def fromhex(x): | |
209 | return ByteString(_unhexify(x)) | |
210 | fromhex = staticmethod(fromhex) | |
f7623015 MW |
211 | if _sys.version_info >= (3,): |
212 | def hex(me): return _hexify(me).decode() | |
213 | else: | |
214 | def hex(me): return _hexify(me) | |
215 | __hex__ = hex | |
d7ab1bab | 216 | def __repr__(me): |
ab093124 | 217 | return 'bytes(%r)' % me.hex() |
d7ab1bab | 218 | _augment(ByteString, _tmp) |
bfb450cc | 219 | ByteString.__hash__ = str.__hash__ |
d7ab1bab | 220 | bytes = ByteString.fromhex |
221 | ||
00401529 | 222 | ###-------------------------------------------------------------------------- |
bebf03ab MW |
223 | ### Symmetric encryption. |
224 | ||
225 | class _tmp: | |
3e611d87 | 226 | def encrypt(me, n, m, tsz = None, h = ByteString.zero(0)): |
bebf03ab MW |
227 | if tsz is None: tsz = me.__class__.tagsz.default |
228 | e = me.enc(n, len(h), len(m), tsz) | |
229 | if not len(h): a = None | |
230 | else: a = e.aad().hash(h) | |
231 | c0 = e.encrypt(m) | |
232 | c1, t = e.done(aad = a) | |
233 | return c0 + c1, t | |
3e611d87 | 234 | def decrypt(me, n, c, t, h = ByteString.zero(0)): |
bebf03ab MW |
235 | d = me.dec(n, len(h), len(c), len(t)) |
236 | if not len(h): a = None | |
237 | else: a = d.aad().hash(h) | |
238 | m = d.decrypt(c) | |
239 | m += d.done(t, aad = a) | |
240 | return m | |
241 | _augment(GAEKey, _tmp) | |
242 | ||
243 | ###-------------------------------------------------------------------------- | |
bfb450cc MW |
244 | ### Hashing. |
245 | ||
246 | class _tmp: | |
247 | def check(me, h): | |
248 | hh = me.done() | |
249 | return ctstreq(h, hh) | |
250 | _augment(GHash, _tmp) | |
251 | _augment(Poly1305Hash, _tmp) | |
252 | ||
6bd22b53 MW |
253 | class _tmp: |
254 | def check(me, h): | |
255 | return ctstreq(h, me.done(len(h))) | |
6bd22b53 | 256 | _augment(Shake, _tmp) |
668b5f54 MW |
257 | |
258 | KMAC128.keysz = KeySZAny(16); KMAC128.tagsz = 16 | |
259 | KMAC256.keysz = KeySZAny(32); KMAC256.tagsz = 32 | |
6bd22b53 | 260 | |
bfb450cc | 261 | ###-------------------------------------------------------------------------- |
ce0340b6 MW |
262 | ### NaCl `secretbox'. |
263 | ||
264 | def secret_box(k, n, m): | |
bebf03ab | 265 | y, t = salsa20_naclbox(k).encrypt(n, m) |
bb5c23a4 | 266 | return t + y |
ce0340b6 MW |
267 | |
268 | def secret_unbox(k, n, c): | |
bebf03ab MW |
269 | tsz = poly1305.tagsz |
270 | return salsa20_naclbox(k).decrypt(n, c[tsz:], c[0:tsz]) | |
ce0340b6 MW |
271 | |
272 | ###-------------------------------------------------------------------------- | |
00401529 | 273 | ### Multiprecision integers and binary polynomials. |
ed8cc62d | 274 | |
83c77564 MW |
275 | class BaseRat (object): |
276 | """Base class implementing fields of fractions over Euclidean domains.""" | |
2ef393b5 | 277 | def __new__(cls, a, b): |
ad52b46f | 278 | a, b = cls.RING._implicit(a), cls.RING._implicit(b) |
2ef393b5 | 279 | q, r = divmod(a, b) |
8d299320 | 280 | if r == cls.ZERO: return q |
2ef393b5 | 281 | g = b.gcd(r) |
83c77564 | 282 | me = super(BaseRat, cls).__new__(cls) |
2ef393b5 MW |
283 | me._n = a//g |
284 | me._d = b//g | |
285 | return me | |
286 | @property | |
287 | def numer(me): return me._n | |
288 | @property | |
289 | def denom(me): return me._d | |
290 | def __str__(me): return '%s/%s' % (me._n, me._d) | |
330e6a74 | 291 | def __repr__(me): return '%s(%s, %s)' % (_clsname(me), me._n, me._d) |
96d7ed6c | 292 | _repr_pretty_ = _pp_str |
2ef393b5 | 293 | |
8d299320 MW |
294 | def _split_rat(me, x): |
295 | if isinstance(x, me.__class__): return x._n, x._d | |
296 | else: return x, me.ONE | |
2ef393b5 | 297 | def __add__(me, you): |
8d299320 | 298 | n, d = me._split_rat(you) |
83c77564 | 299 | return type(me)(me._n*d + n*me._d, d*me._d) |
2ef393b5 MW |
300 | __radd__ = __add__ |
301 | def __sub__(me, you): | |
8d299320 | 302 | n, d = me._split_rat(you) |
83c77564 | 303 | return type(me)(me._n*d - n*me._d, d*me._d) |
2ef393b5 | 304 | def __rsub__(me, you): |
8d299320 | 305 | n, d = me._split_rat(you) |
83c77564 | 306 | return type(me)(n*me._d - me._n*d, d*me._d) |
2ef393b5 | 307 | def __mul__(me, you): |
8d299320 | 308 | n, d = me._split_rat(you) |
83c77564 | 309 | return type(me)(me._n*n, me._d*d) |
08041ebb | 310 | __rmul__ = __mul__ |
b47818ea | 311 | def __truediv__(me, you): |
8d299320 | 312 | n, d = me._split_rat(you) |
83c77564 | 313 | return type(me)(me._n*d, me._d*n) |
b47818ea | 314 | def __rtruediv__(me, you): |
8d299320 | 315 | n, d = me._split_rat(you) |
83c77564 | 316 | return type(me)(me._d*n, me._n*d) |
f7623015 MW |
317 | if _sys.version_info < (3,): |
318 | __div__ = __truediv__ | |
319 | __rdiv__ = __rtruediv__ | |
54ee272d | 320 | def _order(me, you, op): |
8d299320 | 321 | n, d = me._split_rat(you) |
54ee272d MW |
322 | return op(me._n*d, n*me._d) |
323 | def __eq__(me, you): return me._order(you, lambda x, y: x == y) | |
324 | def __ne__(me, you): return me._order(you, lambda x, y: x != y) | |
325 | def __le__(me, you): return me._order(you, lambda x, y: x <= y) | |
326 | def __lt__(me, you): return me._order(you, lambda x, y: x < y) | |
327 | def __gt__(me, you): return me._order(you, lambda x, y: x > y) | |
328 | def __ge__(me, you): return me._order(you, lambda x, y: x >= y) | |
2ef393b5 | 329 | |
83c77564 MW |
330 | class IntRat (BaseRat): |
331 | RING = MP | |
8d299320 | 332 | ZERO, ONE = MP(0), MP(1) |
77535854 MW |
333 | def __new__(cls, a, b): |
334 | if isinstance(a, float) or isinstance(b, float): return a/b | |
335 | return super(IntRat, cls).__new__(cls, a, b) | |
336 | def __float__(me): return float(me._n)/float(me._d) | |
83c77564 MW |
337 | |
338 | class GFRat (BaseRat): | |
339 | RING = GF | |
8d299320 | 340 | ZERO, ONE = GF(0), GF(1) |
83c77564 | 341 | |
d7ab1bab | 342 | class _tmp: |
343 | def negp(x): return x < 0 | |
344 | def posp(x): return x > 0 | |
345 | def zerop(x): return x == 0 | |
346 | def oddp(x): return x.testbit(0) | |
347 | def evenp(x): return not x.testbit(0) | |
348 | def mont(x): return MPMont(x) | |
349 | def barrett(x): return MPBarrett(x) | |
350 | def reduce(x): return MPReduce(x) | |
77535854 MW |
351 | def __truediv__(me, you): |
352 | if isinstance(you, float): return _long(me)/you | |
353 | else: return IntRat(me, you) | |
354 | def __rtruediv__(me, you): | |
355 | if isinstance(you, float): return you/_long(me) | |
356 | else: return IntRat(you, me) | |
f7623015 MW |
357 | if _sys.version_info < (3,): |
358 | __div__ = __truediv__ | |
359 | __rdiv__ = __rtruediv__ | |
96d7ed6c | 360 | _repr_pretty_ = _pp_str |
d7ab1bab | 361 | _augment(MP, _tmp) |
362 | ||
d7ab1bab | 363 | class _tmp: |
fbc145f3 | 364 | def zerop(x): return x == 0 |
ed8cc62d | 365 | def reduce(x): return GFReduce(x) |
fbc145f3 MW |
366 | def trace(x, y): return x.reduce().trace(y) |
367 | def halftrace(x, y): return x.reduce().halftrace(y) | |
368 | def modsqrt(x, y): return x.reduce().sqrt(y) | |
369 | def quadsolve(x, y): return x.reduce().quadsolve(y) | |
b47818ea MW |
370 | def __truediv__(me, you): return GFRat(me, you) |
371 | def __rtruediv__(me, you): return GFRat(you, me) | |
f7623015 MW |
372 | if _sys.version_info < (3,): |
373 | __div__ = __truediv__ | |
374 | __rdiv__ = __rtruediv__ | |
96d7ed6c | 375 | _repr_pretty_ = _pp_str |
d7ab1bab | 376 | _augment(GF, _tmp) |
377 | ||
378 | class _tmp: | |
ed8cc62d MW |
379 | def product(*arg): |
380 | 'product(ITERABLE) or product(I, ...) -> PRODUCT' | |
381 | return MPMul(*arg).done() | |
382 | product = staticmethod(product) | |
383 | _augment(MPMul, _tmp) | |
384 | ||
00401529 MW |
385 | ###-------------------------------------------------------------------------- |
386 | ### Abstract fields. | |
ed8cc62d MW |
387 | |
388 | class _tmp: | |
d7ab1bab | 389 | def fromstring(str): return _checkend(Field.parse(str)) |
390 | fromstring = staticmethod(fromstring) | |
391 | _augment(Field, _tmp) | |
392 | ||
393 | class _tmp: | |
e38168e2 | 394 | def __repr__(me): return '%s(%s)' % (_clsname(me), me.p) |
6d481bc6 | 395 | def __hash__(me): return 0x114401de ^ hash(me.p) |
96d7ed6c | 396 | def _repr_pretty_(me, pp, cyclep): |
582568f1 MW |
397 | ind = _pp_bgroup_tyname(pp, me) |
398 | if cyclep: pp.text('...') | |
399 | else: pp.pretty(me.p) | |
400 | pp.end_group(ind, ')') | |
d7ab1bab | 401 | def ec(me, a, b): return ECPrimeProjCurve(me, a, b) |
402 | _augment(PrimeField, _tmp) | |
403 | ||
404 | class _tmp: | |
e38168e2 | 405 | def __repr__(me): return '%s(%#x)' % (_clsname(me), me.p) |
d7ab1bab | 406 | def ec(me, a, b): return ECBinProjCurve(me, a, b) |
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.text('%#x' % me.p) | |
411 | pp.end_group(ind, ')') | |
d7ab1bab | 412 | _augment(BinField, _tmp) |
413 | ||
414 | class _tmp: | |
6d481bc6 MW |
415 | def __hash__(me): return 0x23e4701c ^ hash(me.p) |
416 | _augment(BinPolyField, _tmp) | |
417 | ||
418 | class _tmp: | |
419 | def __hash__(me): | |
420 | h = 0x9a7d6240 | |
421 | h ^= hash(me.p) | |
422 | h ^= 2*hash(me.beta) & 0xffffffff | |
423 | return h | |
424 | _augment(BinNormField, _tmp) | |
425 | ||
426 | class _tmp: | |
d7ab1bab | 427 | def __str__(me): return str(me.value) |
428 | def __repr__(me): return '%s(%s)' % (repr(me.field), repr(me.value)) | |
96d7ed6c | 429 | _repr_pretty_ = _pp_str |
d7ab1bab | 430 | _augment(FE, _tmp) |
431 | ||
00401529 MW |
432 | ###-------------------------------------------------------------------------- |
433 | ### Elliptic curves. | |
d7ab1bab | 434 | |
435 | class _tmp: | |
436 | def __repr__(me): | |
330e6a74 | 437 | return '%s(%r, %s, %s)' % (_clsname(me), me.field, me.a, me.b) |
96d7ed6c | 438 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 439 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 440 | if cyclep: |
582568f1 | 441 | pp.text('...') |
96d7ed6c | 442 | else: |
96d7ed6c MW |
443 | pp.pretty(me.field); pp.text(','); pp.breakable() |
444 | pp.pretty(me.a); pp.text(','); pp.breakable() | |
445 | pp.pretty(me.b) | |
582568f1 | 446 | pp.end_group(ind, ')') |
96f89e4d MW |
447 | def fromstring(str): return _checkend(ECCurve.parse(str)) |
448 | fromstring = staticmethod(fromstring) | |
d7ab1bab | 449 | def frombuf(me, s): |
450 | return ecpt.frombuf(me, s) | |
451 | def fromraw(me, s): | |
452 | return ecpt.fromraw(me, s) | |
453 | def pt(me, *args): | |
5f959e50 | 454 | return me(*args) |
d7ab1bab | 455 | _augment(ECCurve, _tmp) |
456 | ||
457 | class _tmp: | |
6d481bc6 MW |
458 | def __hash__(me): |
459 | h = 0x6751d341 | |
460 | h ^= hash(me.field) | |
461 | h ^= 2*hash(me.a) ^ 0xffffffff | |
462 | h ^= 5*hash(me.b) ^ 0xffffffff | |
463 | return h | |
464 | _augment(ECPrimeCurve, _tmp) | |
465 | ||
466 | class _tmp: | |
467 | def __hash__(me): | |
468 | h = 0x2ac203c5 | |
469 | h ^= hash(me.field) | |
470 | h ^= 2*hash(me.a) ^ 0xffffffff | |
471 | h ^= 5*hash(me.b) ^ 0xffffffff | |
472 | return h | |
473 | _augment(ECBinCurve, _tmp) | |
474 | ||
475 | class _tmp: | |
d7ab1bab | 476 | def __repr__(me): |
330e6a74 MW |
477 | if not me: return '%s()' % _clsname(me) |
478 | return '%s(%s, %s)' % (_clsname(me), me.ix, me.iy) | |
d7ab1bab | 479 | def __str__(me): |
480 | if not me: return 'inf' | |
481 | return '(%s, %s)' % (me.ix, me.iy) | |
96d7ed6c MW |
482 | def _repr_pretty_(me, pp, cyclep): |
483 | if cyclep: | |
484 | pp.text('...') | |
485 | elif not me: | |
486 | pp.text('inf') | |
487 | else: | |
582568f1 | 488 | ind = _pp_bgroup(pp, '(') |
96d7ed6c MW |
489 | pp.pretty(me.ix); pp.text(','); pp.breakable() |
490 | pp.pretty(me.iy) | |
582568f1 | 491 | pp.end_group(ind, ')') |
d7ab1bab | 492 | _augment(ECPt, _tmp) |
493 | ||
494 | class _tmp: | |
495 | def __repr__(me): | |
330e6a74 MW |
496 | return '%s(curve = %r, G = %r, r = %s, h = %s)' % \ |
497 | (_clsname(me), me.curve, me.G, me.r, me.h) | |
96d7ed6c | 498 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 499 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 500 | if cyclep: |
582568f1 | 501 | pp.text('...') |
96d7ed6c | 502 | else: |
96d7ed6c MW |
503 | _pp_kv(pp, 'curve', me.curve); pp.text(','); pp.breakable() |
504 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
505 | _pp_kv(pp, 'r', me.r); pp.text(','); pp.breakable() | |
506 | _pp_kv(pp, 'h', me.h) | |
582568f1 | 507 | pp.end_group(ind, ')') |
6d481bc6 MW |
508 | def __hash__(me): |
509 | h = 0x9bedb8de | |
510 | h ^= hash(me.curve) | |
511 | h ^= 2*hash(me.G) & 0xffffffff | |
512 | return h | |
96f89e4d MW |
513 | def fromstring(str): return _checkend(ECInfo.parse(str)) |
514 | fromstring = staticmethod(fromstring) | |
d7ab1bab | 515 | def group(me): |
516 | return ECGroup(me) | |
517 | _augment(ECInfo, _tmp) | |
518 | ||
519 | class _tmp: | |
520 | def __repr__(me): | |
521 | if not me: return '%r()' % (me.curve) | |
522 | return '%r(%s, %s)' % (me.curve, me.x, me.y) | |
523 | def __str__(me): | |
524 | if not me: return 'inf' | |
525 | return '(%s, %s)' % (me.x, me.y) | |
7a7aa30e MW |
526 | def _repr_pretty_(me, pp, cyclep): |
527 | if cyclep: | |
528 | pp.text('...') | |
529 | elif not me: | |
530 | pp.text('inf') | |
531 | else: | |
532 | ind = _pp_bgroup(pp, '(') | |
533 | pp.pretty(me.x); pp.text(','); pp.breakable() | |
534 | pp.pretty(me.y) | |
535 | pp.end_group(ind, ')') | |
d7ab1bab | 536 | _augment(ECPtCurve, _tmp) |
537 | ||
00401529 MW |
538 | ###-------------------------------------------------------------------------- |
539 | ### Key sizes. | |
ed8cc62d | 540 | |
d7ab1bab | 541 | class _tmp: |
330e6a74 | 542 | def __repr__(me): return '%s(%d)' % (_clsname(me), me.default) |
d7ab1bab | 543 | def check(me, sz): return True |
544 | def best(me, sz): return sz | |
dfb915d3 | 545 | def pad(me, sz): return sz |
d7ab1bab | 546 | _augment(KeySZAny, _tmp) |
547 | ||
548 | class _tmp: | |
549 | def __repr__(me): | |
330e6a74 MW |
550 | return '%s(%d, %d, %d, %d)' % \ |
551 | (_clsname(me), me.default, me.min, me.max, me.mod) | |
96d7ed6c | 552 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 553 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 554 | if cyclep: |
582568f1 | 555 | pp.text('...') |
96d7ed6c | 556 | else: |
96d7ed6c MW |
557 | pp.pretty(me.default); pp.text(','); pp.breakable() |
558 | pp.pretty(me.min); pp.text(','); pp.breakable() | |
559 | pp.pretty(me.max); pp.text(','); pp.breakable() | |
560 | pp.pretty(me.mod) | |
582568f1 | 561 | pp.end_group(ind, ')') |
dfb915d3 | 562 | def check(me, sz): return me.min <= sz <= me.max and sz%me.mod == 0 |
d7ab1bab | 563 | def best(me, sz): |
1c7419c9 | 564 | if sz < me.min: raise ValueError('key too small') |
a9410db7 | 565 | elif me.max is not None and sz > me.max: return me.max |
dfb915d3 MW |
566 | else: return sz - sz%me.mod |
567 | def pad(me, sz): | |
a9410db7 | 568 | if me.max is not None and sz > me.max: raise ValueError('key too large') |
dfb915d3 | 569 | elif sz < me.min: return me.min |
8fc76cc0 | 570 | else: sz += me.mod - 1; return sz - sz%me.mod |
d7ab1bab | 571 | _augment(KeySZRange, _tmp) |
572 | ||
573 | class _tmp: | |
330e6a74 | 574 | def __repr__(me): return '%s(%d, %s)' % (_clsname(me), me.default, me.set) |
96d7ed6c | 575 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 576 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 577 | if cyclep: |
582568f1 | 578 | pp.text('...') |
96d7ed6c | 579 | else: |
96d7ed6c | 580 | pp.pretty(me.default); pp.text(','); pp.breakable() |
582568f1 | 581 | ind1 = _pp_bgroup(pp, '{') |
96d7ed6c | 582 | _pp_commas(pp, pp.pretty, me.set) |
582568f1 MW |
583 | pp.end_group(ind1, '}') |
584 | pp.end_group(ind, ')') | |
d7ab1bab | 585 | def check(me, sz): return sz in me.set |
586 | def best(me, sz): | |
587 | found = -1 | |
588 | for i in me.set: | |
589 | if found < i <= sz: found = i | |
1c7419c9 | 590 | if found < 0: raise ValueError('key too small') |
d7ab1bab | 591 | return found |
dfb915d3 MW |
592 | def pad(me, sz): |
593 | found = -1 | |
594 | for i in me.set: | |
595 | if sz <= i and (found == -1 or i < found): found = i | |
1c7419c9 | 596 | if found < 0: raise ValueError('key too large') |
dfb915d3 | 597 | return found |
d7ab1bab | 598 | _augment(KeySZSet, _tmp) |
599 | ||
00401529 | 600 | ###-------------------------------------------------------------------------- |
96d7ed6c MW |
601 | ### Key data objects. |
602 | ||
603 | class _tmp: | |
618cbc92 MW |
604 | def merge(me, file, report = None): |
605 | """KF.merge(FILE, [report = <built-in-reporter>])""" | |
606 | name = file.name | |
607 | lno = 1 | |
608 | for line in file: | |
609 | me.mergeline(name, lno, line, report) | |
610 | lno += 1 | |
611 | return me | |
330e6a74 | 612 | def __repr__(me): return '%s(%r)' % (_clsname(me), me.name) |
96d7ed6c MW |
613 | _augment(KeyFile, _tmp) |
614 | ||
615 | class _tmp: | |
618cbc92 MW |
616 | def extract(me, file, filter = ''): |
617 | """KEY.extract(FILE, [filter = <any>])""" | |
618 | line = me.extractline(filter) | |
619 | file.write(line) | |
620 | return me | |
330e6a74 | 621 | def __repr__(me): return '%s(%r)' % (_clsname(me), me.fulltag) |
96d7ed6c MW |
622 | _augment(Key, _tmp) |
623 | ||
624 | class _tmp: | |
625 | def __repr__(me): | |
330e6a74 | 626 | return '%s({%s})' % (_clsname(me), |
d6542364 | 627 | ', '.join(['%r: %r' % kv for kv in _iteritems(me)()])) |
96d7ed6c | 628 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 629 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 630 | if cyclep: pp.text('...') |
d6542364 | 631 | else: _pp_dict(pp, _iteritems(me)) |
582568f1 | 632 | pp.end_group(ind, ')') |
96d7ed6c MW |
633 | _augment(KeyAttributes, _tmp) |
634 | ||
635 | class _tmp: | |
849e8a20 | 636 | def __repr__(me): |
652e16ea MW |
637 | return '%s(%s, %r)' % (_clsname(me), |
638 | _repr_secret(me._guts(), | |
639 | not (me.flags & KF_NONSECRET)), | |
640 | me.writeflags(me.flags)) | |
96d7ed6c | 641 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 642 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 643 | if cyclep: |
582568f1 | 644 | pp.text('...') |
96d7ed6c | 645 | else: |
652e16ea MW |
646 | _pp_secret(pp, me._guts(), not (me.flags & KF_NONSECRET)) |
647 | pp.text(','); pp.breakable() | |
96d7ed6c | 648 | pp.pretty(me.writeflags(me.flags)) |
582568f1 | 649 | pp.end_group(ind, ')') |
c567f805 MW |
650 | def __hash__(me): return me._HASHBASE ^ hash(me._guts()) |
651 | def __eq__(me, kd): | |
652 | return type(me) == type(kd) and \ | |
653 | me._guts() == kd._guts() and \ | |
654 | me.flags == kd.flags | |
655 | def __ne__(me, kd): | |
656 | return not me == kd | |
849e8a20 MW |
657 | _augment(KeyData, _tmp) |
658 | ||
659 | class _tmp: | |
660 | def _guts(me): return me.bin | |
c567f805 MW |
661 | def __eq__(me, kd): |
662 | return isinstance(kd, KeyDataBinary) and me.bin == kd.bin | |
96d7ed6c | 663 | _augment(KeyDataBinary, _tmp) |
c567f805 | 664 | KeyDataBinary._HASHBASE = 0x961755c3 |
96d7ed6c MW |
665 | |
666 | class _tmp: | |
849e8a20 | 667 | def _guts(me): return me.ct |
96d7ed6c | 668 | _augment(KeyDataEncrypted, _tmp) |
c567f805 | 669 | KeyDataEncrypted._HASHBASE = 0xffe000d4 |
96d7ed6c MW |
670 | |
671 | class _tmp: | |
849e8a20 | 672 | def _guts(me): return me.mp |
96d7ed6c | 673 | _augment(KeyDataMP, _tmp) |
c567f805 | 674 | KeyDataMP._HASHBASE = 0x1cb64d69 |
96d7ed6c MW |
675 | |
676 | class _tmp: | |
849e8a20 | 677 | def _guts(me): return me.str |
96d7ed6c | 678 | _augment(KeyDataString, _tmp) |
c567f805 | 679 | KeyDataString._HASHBASE = 0x349c33ea |
96d7ed6c MW |
680 | |
681 | class _tmp: | |
849e8a20 | 682 | def _guts(me): return me.ecpt |
96d7ed6c | 683 | _augment(KeyDataECPt, _tmp) |
c567f805 | 684 | KeyDataECPt._HASHBASE = 0x2509718b |
96d7ed6c MW |
685 | |
686 | class _tmp: | |
687 | def __repr__(me): | |
330e6a74 | 688 | return '%s({%s})' % (_clsname(me), |
d6542364 | 689 | ', '.join(['%r: %r' % kv for kv in _iteritems(me)])) |
96d7ed6c | 690 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 691 | ind = _pp_bgroup_tyname(pp, me, '({ ') |
96d7ed6c | 692 | if cyclep: pp.text('...') |
d6542364 | 693 | else: _pp_dict(pp, _iteritems(me)) |
582568f1 | 694 | pp.end_group(ind, ' })') |
c567f805 MW |
695 | def __hash__(me): |
696 | h = me._HASHBASE | |
697 | for k, v in _iteritems(me): | |
698 | h = ((h << 1) ^ 3*hash(k) ^ 5*hash(v))&0xffffffff | |
699 | return h | |
700 | def __eq__(me, kd): | |
701 | if type(me) != type(kd) or me.flags != kd.flags or len(me) != len(kd): | |
702 | return False | |
703 | for k, v in _iteritems(me): | |
704 | try: vv = kd[k] | |
705 | except KeyError: return False | |
706 | if v != vv: return False | |
707 | return True | |
96d7ed6c | 708 | _augment(KeyDataStructured, _tmp) |
c567f805 | 709 | KeyDataStructured._HASHBASE = 0x85851b21 |
96d7ed6c MW |
710 | |
711 | ###-------------------------------------------------------------------------- | |
00401529 | 712 | ### Abstract groups. |
ed8cc62d | 713 | |
d7ab1bab | 714 | class _tmp: |
715 | def __repr__(me): | |
330e6a74 | 716 | return '%s(p = %s, r = %s, g = %s)' % (_clsname(me), me.p, me.r, me.g) |
96d7ed6c | 717 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 718 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 719 | if cyclep: |
582568f1 | 720 | pp.text('...') |
96d7ed6c | 721 | else: |
96d7ed6c MW |
722 | _pp_kv(pp, 'p', me.p); pp.text(','); pp.breakable() |
723 | _pp_kv(pp, 'r', me.r); pp.text(','); pp.breakable() | |
724 | _pp_kv(pp, 'g', me.g) | |
582568f1 | 725 | pp.end_group(ind, ')') |
d7ab1bab | 726 | _augment(FGInfo, _tmp) |
727 | ||
728 | class _tmp: | |
729 | def group(me): return PrimeGroup(me) | |
730 | _augment(DHInfo, _tmp) | |
731 | ||
732 | class _tmp: | |
733 | def group(me): return BinGroup(me) | |
734 | _augment(BinDHInfo, _tmp) | |
735 | ||
736 | class _tmp: | |
737 | def __repr__(me): | |
330e6a74 | 738 | return '%s(%r)' % (_clsname(me), me.info) |
99d932fe MW |
739 | def _repr_pretty_(me, pp, cyclep): |
740 | ind = _pp_bgroup_tyname(pp, me) | |
741 | if cyclep: pp.text('...') | |
742 | else: pp.pretty(me.info) | |
743 | pp.end_group(ind, ')') | |
d7ab1bab | 744 | _augment(Group, _tmp) |
745 | ||
746 | class _tmp: | |
6d481bc6 MW |
747 | def __hash__(me): |
748 | info = me.info | |
749 | h = 0xbce3cfe6 | |
750 | h ^= hash(info.p) | |
751 | h ^= 2*hash(info.r) & 0xffffffff | |
752 | h ^= 5*hash(info.g) & 0xffffffff | |
753 | return h | |
d7012c2b | 754 | def _get_geval(me, x): return MP(x) |
6d481bc6 MW |
755 | _augment(PrimeGroup, _tmp) |
756 | ||
757 | class _tmp: | |
758 | def __hash__(me): | |
759 | info = me.info | |
760 | h = 0x80695949 | |
761 | h ^= hash(info.p) | |
762 | h ^= 2*hash(info.r) & 0xffffffff | |
763 | h ^= 5*hash(info.g) & 0xffffffff | |
764 | return h | |
d7012c2b | 765 | def _get_geval(me, x): return GF(x) |
6d481bc6 MW |
766 | _augment(BinGroup, _tmp) |
767 | ||
768 | class _tmp: | |
769 | def __hash__(me): return 0x0ec23dab ^ hash(me.info) | |
d7012c2b | 770 | def _get_geval(me, x): return x.toec() |
6d481bc6 MW |
771 | _augment(ECGroup, _tmp) |
772 | ||
773 | class _tmp: | |
d7ab1bab | 774 | def __repr__(me): |
775 | return '%r(%r)' % (me.group, str(me)) | |
d7012c2b MW |
776 | def _repr_pretty_(me, pp, cyclep): |
777 | pp.pretty(type(me)._get_geval(me)) | |
d7ab1bab | 778 | _augment(GE, _tmp) |
779 | ||
00401529 MW |
780 | ###-------------------------------------------------------------------------- |
781 | ### RSA encoding techniques. | |
ed8cc62d MW |
782 | |
783 | class PKCS1Crypt (object): | |
467c2619 | 784 | def __init__(me, ep = _bin(''), rng = rand): |
d7ab1bab | 785 | me.ep = ep |
786 | me.rng = rng | |
787 | def encode(me, msg, nbits): | |
788 | return _base._p1crypt_encode(msg, nbits, me.ep, me.rng) | |
789 | def decode(me, ct, nbits): | |
790 | return _base._p1crypt_decode(ct, nbits, me.ep, me.rng) | |
791 | ||
ed8cc62d | 792 | class PKCS1Sig (object): |
467c2619 | 793 | def __init__(me, ep = _bin(''), rng = rand): |
d7ab1bab | 794 | me.ep = ep |
795 | me.rng = rng | |
796 | def encode(me, msg, nbits): | |
797 | return _base._p1sig_encode(msg, nbits, me.ep, me.rng) | |
798 | def decode(me, msg, sig, nbits): | |
799 | return _base._p1sig_decode(msg, sig, nbits, me.ep, me.rng) | |
800 | ||
ed8cc62d | 801 | class OAEP (object): |
467c2619 | 802 | def __init__(me, mgf = sha_mgf, hash = sha, ep = _bin(''), rng = rand): |
d7ab1bab | 803 | me.mgf = mgf |
804 | me.hash = hash | |
805 | me.ep = ep | |
806 | me.rng = rng | |
807 | def encode(me, msg, nbits): | |
808 | return _base._oaep_encode(msg, nbits, me.mgf, me.hash, me.ep, me.rng) | |
809 | def decode(me, ct, nbits): | |
810 | return _base._oaep_decode(ct, nbits, me.mgf, me.hash, me.ep, me.rng) | |
811 | ||
ed8cc62d | 812 | class PSS (object): |
d7ab1bab | 813 | def __init__(me, mgf = sha_mgf, hash = sha, saltsz = None, rng = rand): |
814 | me.mgf = mgf | |
815 | me.hash = hash | |
816 | if saltsz is None: | |
817 | saltsz = hash.hashsz | |
818 | me.saltsz = saltsz | |
819 | me.rng = rng | |
820 | def encode(me, msg, nbits): | |
821 | return _base._pss_encode(msg, nbits, me.mgf, me.hash, me.saltsz, me.rng) | |
822 | def decode(me, msg, sig, nbits): | |
823 | return _base._pss_decode(msg, sig, nbits, | |
00401529 | 824 | me.mgf, me.hash, me.saltsz, me.rng) |
d7ab1bab | 825 | |
826 | class _tmp: | |
827 | def encrypt(me, msg, enc): | |
828 | return me.pubop(enc.encode(msg, me.n.nbits)) | |
829 | def verify(me, msg, sig, enc): | |
830 | if msg is None: return enc.decode(msg, me.pubop(sig), me.n.nbits) | |
831 | try: | |
832 | x = enc.decode(msg, me.pubop(sig), me.n.nbits) | |
833 | return x is None or x == msg | |
834 | except ValueError: | |
b2687a0a | 835 | return False |
bbd94558 MW |
836 | def __repr__(me): |
837 | return '%s(n = %r, e = %r)' % (_clsname(me), me.n, me.e) | |
838 | def _repr_pretty_(me, pp, cyclep): | |
839 | ind = _pp_bgroup_tyname(pp, me) | |
840 | if cyclep: | |
841 | pp.text('...') | |
842 | else: | |
843 | _pp_kv(pp, 'n', me.n); pp.text(','); pp.breakable() | |
844 | _pp_kv(pp, 'e', me.e) | |
845 | pp.end_group(ind, ')') | |
d7ab1bab | 846 | _augment(RSAPub, _tmp) |
847 | ||
848 | class _tmp: | |
849 | def decrypt(me, ct, enc): return enc.decode(me.privop(ct), me.n.nbits) | |
850 | def sign(me, msg, enc): return me.privop(enc.encode(msg, me.n.nbits)) | |
bbd94558 MW |
851 | def __repr__(me): |
852 | return '%s(n = %r, e = %r, d = %s, ' \ | |
853 | 'p = %s, q = %s, dp = %s, dq = %s, q_inv = %s)' % \ | |
854 | (_clsname(me), me.n, me.e, | |
855 | _repr_secret(me.d), _repr_secret(me.p), _repr_secret(me.q), | |
856 | _repr_secret(me.dp), _repr_secret(me.dq), _repr_secret(me.q_inv)) | |
857 | def _repr_pretty_(me, pp, cyclep): | |
858 | ind = _pp_bgroup_tyname(pp, me) | |
859 | if cyclep: | |
860 | pp.text('...') | |
861 | else: | |
862 | _pp_kv(pp, 'n', me.n); pp.text(','); pp.breakable() | |
863 | _pp_kv(pp, 'e', me.e); pp.text(','); pp.breakable() | |
864 | _pp_kv(pp, 'd', me.d, secretp = True); pp.text(','); pp.breakable() | |
865 | _pp_kv(pp, 'p', me.p, secretp = True); pp.text(','); pp.breakable() | |
866 | _pp_kv(pp, 'q', me.q, secretp = True); pp.text(','); pp.breakable() | |
867 | _pp_kv(pp, 'dp', me.dp, secretp = True); pp.text(','); pp.breakable() | |
868 | _pp_kv(pp, 'dq', me.dq, secretp = True); pp.text(','); pp.breakable() | |
869 | _pp_kv(pp, 'q_inv', me.q_inv, secretp = True) | |
870 | pp.end_group(ind, ')') | |
d7ab1bab | 871 | _augment(RSAPriv, _tmp) |
872 | ||
00401529 | 873 | ###-------------------------------------------------------------------------- |
bbd94558 MW |
874 | ### DSA and related schemes. |
875 | ||
876 | class _tmp: | |
1b3b79da MW |
877 | def __repr__(me): return '%s(G = %r, p = %r, hash = %r)' % \ |
878 | (_clsname(me), me.G, me.p, me.hash) | |
bbd94558 MW |
879 | def _repr_pretty_(me, pp, cyclep): |
880 | ind = _pp_bgroup_tyname(pp, me) | |
881 | if cyclep: | |
882 | pp.text('...') | |
883 | else: | |
884 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
1b3b79da MW |
885 | _pp_kv(pp, 'p', me.p); pp.text(','); pp.breakable() |
886 | _pp_kv(pp, 'hash', me.hash) | |
bbd94558 MW |
887 | pp.end_group(ind, ')') |
888 | _augment(DSAPub, _tmp) | |
889 | _augment(KCDSAPub, _tmp) | |
890 | ||
891 | class _tmp: | |
1b3b79da MW |
892 | def __repr__(me): return '%s(G = %r, u = %s, p = %r, hash = %r)' % \ |
893 | (_clsname(me), me.G, _repr_secret(me.u), me.p, me.hash) | |
bbd94558 MW |
894 | def _repr_pretty_(me, pp, cyclep): |
895 | ind = _pp_bgroup_tyname(pp, me) | |
896 | if cyclep: | |
897 | pp.text('...') | |
898 | else: | |
899 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
900 | _pp_kv(pp, 'u', me.u, True); pp.text(','); pp.breakable() | |
1b3b79da MW |
901 | _pp_kv(pp, 'p', me.p); pp.text(','); pp.breakable() |
902 | _pp_kv(pp, 'hash', me.hash) | |
bbd94558 MW |
903 | pp.end_group(ind, ')') |
904 | _augment(DSAPriv, _tmp) | |
905 | _augment(KCDSAPriv, _tmp) | |
906 | ||
907 | ###-------------------------------------------------------------------------- | |
eb8aa4ec | 908 | ### Bernstein's elliptic curve crypto and related schemes. |
848ba392 | 909 | |
8e6f45a3 MW |
910 | X25519_BASE = MP(9).storel(32) |
911 | X448_BASE = MP(5).storel(56) | |
eb8aa4ec | 912 | |
5a8b43b3 | 913 | Z128 = ByteString.zero(16) |
848ba392 | 914 | |
925aa45b | 915 | class _BasePub (object): |
f40e338b | 916 | def __init__(me, pub, *args, **kw): |
1c7419c9 | 917 | if not me._PUBSZ.check(len(pub)): raise ValueError('bad public key') |
925aa45b | 918 | super(_BasePub, me).__init__(*args, **kw) |
848ba392 | 919 | me.pub = pub |
bbd94558 | 920 | def __repr__(me): return '%s(pub = %r)' % (_clsname(me), me.pub) |
925aa45b | 921 | def _pp(me, pp): _pp_kv(pp, 'pub', me.pub) |
bbd94558 MW |
922 | def _repr_pretty_(me, pp, cyclep): |
923 | ind = _pp_bgroup_tyname(pp, me) | |
925aa45b MW |
924 | if cyclep: pp.text('...') |
925 | else: me._pp(pp) | |
bbd94558 | 926 | pp.end_group(ind, ')') |
848ba392 | 927 | |
925aa45b | 928 | class _BasePriv (object): |
f40e338b | 929 | def __init__(me, priv, pub = None, *args, **kw): |
1c7419c9 | 930 | if not me._KEYSZ.check(len(priv)): raise ValueError('bad private key') |
925aa45b MW |
931 | if pub is None: pub = me._pubkey(priv) |
932 | super(_BasePriv, me).__init__(pub = pub, *args, **kw) | |
848ba392 | 933 | me.priv = priv |
925aa45b MW |
934 | @classmethod |
935 | def generate(cls, rng = rand): | |
936 | return cls(rng.block(cls._KEYSZ.default)) | |
937 | def __repr__(me): | |
938 | return '%s(priv = %d, pub = %r)' % \ | |
939 | (_clsname(me), _repr_secret(me.priv), me.pub) | |
940 | def _pp(me, pp): | |
941 | _pp_kv(pp, 'priv', me.priv, secretp = True); pp.text(','); pp.breakable() | |
942 | super(_BasePriv, me)._pp(pp) | |
943 | ||
944 | class _XDHPub (_BasePub): pass | |
945 | ||
946 | class _XDHPriv (_BasePriv): | |
947 | def _pubkey(me, priv): return me._op(priv, me._BASE) | |
848ba392 | 948 | def agree(me, you): return me._op(me.priv, you.pub) |
925aa45b MW |
949 | def boxkey(me, recip): return me._hashkey(me.agree(recip)) |
950 | def box(me, recip, n, m): return secret_box(me.boxkey(recip), n, m) | |
951 | def unbox(me, recip, n, c): return secret_unbox(me.boxkey(recip), n, c) | |
848ba392 | 952 | |
925aa45b MW |
953 | class X25519Pub (_XDHPub): |
954 | _PUBSZ = KeySZSet(X25519_PUBSZ) | |
848ba392 MW |
955 | _BASE = X25519_BASE |
956 | ||
925aa45b MW |
957 | class X25519Priv (_XDHPriv, X25519Pub): |
958 | _KEYSZ = KeySZSet(X25519_KEYSZ) | |
848ba392 MW |
959 | def _op(me, k, X): return x25519(k, X) |
960 | def _hashkey(me, z): return hsalsa20_prf(z, Z128) | |
961 | ||
925aa45b MW |
962 | class X448Pub (_XDHPub): |
963 | _PUBSZ = KeySZSet(X448_PUBSZ) | |
eb8aa4ec MW |
964 | _BASE = X448_BASE |
965 | ||
925aa45b MW |
966 | class X448Priv (_XDHPriv, X448Pub): |
967 | _KEYSZ = KeySZSet(X448_KEYSZ) | |
eb8aa4ec | 968 | def _op(me, k, X): return x448(k, X) |
f1b0cf0d | 969 | def _hashkey(me, z): return Shake256().hash(z).done(salsa20.keysz.default) |
eb8aa4ec | 970 | |
925aa45b | 971 | class _EdDSAPub (_BasePub): |
058f0a00 MW |
972 | def beginhash(me): return me._HASH() |
973 | def endhash(me, h): return h.done() | |
925aa45b MW |
974 | |
975 | class _EdDSAPriv (_BasePriv, _EdDSAPub): | |
976 | pass | |
977 | ||
978 | class Ed25519Pub (_EdDSAPub): | |
979 | _PUBSZ = KeySZSet(ED25519_PUBSZ) | |
058f0a00 | 980 | _HASH = sha512 |
5c4c0231 MW |
981 | def verify(me, msg, sig, **kw): |
982 | return ed25519_verify(me.pub, msg, sig, **kw) | |
dafb2da4 | 983 | |
925aa45b MW |
984 | class Ed25519Priv (_EdDSAPriv, Ed25519Pub): |
985 | _KEYSZ = KeySZAny(ED25519_KEYSZ) | |
986 | def _pubkey(me, priv): return ed25519_pubkey(priv) | |
5c4c0231 MW |
987 | def sign(me, msg, **kw): |
988 | return ed25519_sign(me.priv, msg, pub = me.pub, **kw) | |
dafb2da4 | 989 | |
eee202c3 MW |
990 | class Ed448Pub (_EdDSAPub): |
991 | _PUBSZ = KeySZSet(ED448_PUBSZ) | |
992 | _HASH = shake256 | |
993 | def verify(me, msg, sig, **kw): | |
994 | return ed448_verify(me.pub, msg, sig, **kw) | |
995 | ||
996 | class Ed448Priv (_EdDSAPriv, Ed448Pub): | |
997 | _KEYSZ = KeySZAny(ED448_KEYSZ) | |
998 | def _pubkey(me, priv): return ed448_pubkey(priv) | |
999 | def sign(me, msg, **kw): | |
1000 | return ed448_sign(me.priv, msg, pub = me.pub, **kw) | |
1001 | ||
848ba392 | 1002 | ###-------------------------------------------------------------------------- |
a539ffb8 MW |
1003 | ### Built-in algorithm and group tables. |
1004 | ||
1005 | class _tmp: | |
ed8cc62d | 1006 | def __repr__(me): |
d6542364 | 1007 | return '{%s}' % ', '.join(['%r: %r' % kv for kv in _iteritems(me)]) |
96d7ed6c | 1008 | def _repr_pretty_(me, pp, cyclep): |
582568f1 MW |
1009 | ind = _pp_bgroup(pp, '{ ') |
1010 | if cyclep: pp.text('...') | |
d6542364 | 1011 | else: _pp_dict(pp, _iteritems(me)) |
582568f1 | 1012 | pp.end_group(ind, ' }') |
a539ffb8 | 1013 | _augment(_base._MiscTable, _tmp) |
ed8cc62d | 1014 | |
00401529 MW |
1015 | ###-------------------------------------------------------------------------- |
1016 | ### Prime number generation. | |
ed8cc62d MW |
1017 | |
1018 | class PrimeGenEventHandler (object): | |
1019 | def pg_begin(me, ev): | |
1020 | return me.pg_try(ev) | |
1021 | def pg_done(me, ev): | |
1022 | return PGEN_DONE | |
1023 | def pg_abort(me, ev): | |
1024 | return PGEN_TRY | |
1025 | def pg_fail(me, ev): | |
1026 | return PGEN_TRY | |
1027 | def pg_pass(me, ev): | |
1028 | return PGEN_TRY | |
d7ab1bab | 1029 | |
1030 | class SophieGermainStepJump (object): | |
1031 | def pg_begin(me, ev): | |
1032 | me.lf = PrimeFilter(ev.x) | |
1033 | me.hf = me.lf.muladd(2, 1) | |
1034 | return me.cont(ev) | |
1035 | def pg_try(me, ev): | |
1036 | me.step() | |
1037 | return me.cont(ev) | |
1038 | def cont(me, ev): | |
1039 | while me.lf.status == PGEN_FAIL or me.hf.status == PGEN_FAIL: | |
1040 | me.step() | |
1041 | if me.lf.status == PGEN_ABORT or me.hf.status == PGEN_ABORT: | |
1042 | return PGEN_ABORT | |
1043 | ev.x = me.lf.x | |
1044 | if me.lf.status == PGEN_DONE and me.hf.status == PGEN_DONE: | |
1045 | return PGEN_DONE | |
1046 | return PGEN_TRY | |
1047 | def pg_done(me, ev): | |
1048 | del me.lf | |
1049 | del me.hf | |
1050 | ||
1051 | class SophieGermainStepper (SophieGermainStepJump): | |
1052 | def __init__(me, step): | |
1053 | me.lstep = step; | |
1054 | me.hstep = 2 * step | |
1055 | def step(me): | |
1056 | me.lf.step(me.lstep) | |
1057 | me.hf.step(me.hstep) | |
1058 | ||
1059 | class SophieGermainJumper (SophieGermainStepJump): | |
1060 | def __init__(me, jump): | |
1061 | me.ljump = PrimeFilter(jump); | |
1062 | me.hjump = me.ljump.muladd(2, 0) | |
1063 | def step(me): | |
1064 | me.lf.jump(me.ljump) | |
1065 | me.hf.jump(me.hjump) | |
1066 | def pg_done(me, ev): | |
1067 | del me.ljump | |
1068 | del me.hjump | |
1069 | SophieGermainStepJump.pg_done(me, ev) | |
1070 | ||
1071 | class SophieGermainTester (object): | |
1072 | def __init__(me): | |
1073 | pass | |
1074 | def pg_begin(me, ev): | |
1075 | me.lr = RabinMiller(ev.x) | |
1076 | me.hr = RabinMiller(2 * ev.x + 1) | |
1077 | def pg_try(me, ev): | |
1078 | lst = me.lr.test(ev.rng.range(me.lr.x)) | |
1079 | if lst != PGEN_PASS and lst != PGEN_DONE: | |
1080 | return lst | |
1081 | rst = me.hr.test(ev.rng.range(me.hr.x)) | |
1082 | if rst != PGEN_PASS and rst != PGEN_DONE: | |
1083 | return rst | |
1084 | if lst == PGEN_DONE and rst == PGEN_DONE: | |
1085 | return PGEN_DONE | |
1086 | return PGEN_PASS | |
1087 | def pg_done(me, ev): | |
1088 | del me.lr | |
1089 | del me.hr | |
1090 | ||
d7ab1bab | 1091 | class PrimitiveStepper (PrimeGenEventHandler): |
1092 | def __init__(me): | |
1093 | pass | |
1094 | def pg_try(me, ev): | |
1095 | ev.x = me.i.next() | |
1096 | return PGEN_TRY | |
1097 | def pg_begin(me, ev): | |
1098 | me.i = iter(smallprimes) | |
1099 | return me.pg_try(ev) | |
1100 | ||
1101 | class PrimitiveTester (PrimeGenEventHandler): | |
1102 | def __init__(me, mod, hh = [], exp = None): | |
1103 | me.mod = MPMont(mod) | |
1104 | me.exp = exp | |
1105 | me.hh = hh | |
1106 | def pg_try(me, ev): | |
1107 | x = ev.x | |
1108 | if me.exp is not None: | |
1109 | x = me.mod.exp(x, me.exp) | |
1110 | if x == 1: return PGEN_FAIL | |
1111 | for h in me.hh: | |
1112 | if me.mod.exp(x, h) == 1: return PGEN_FAIL | |
1113 | ev.x = x | |
1114 | return PGEN_DONE | |
1115 | ||
1116 | class SimulStepper (PrimeGenEventHandler): | |
1117 | def __init__(me, mul = 2, add = 1, step = 2): | |
1118 | me.step = step | |
1119 | me.mul = mul | |
1120 | me.add = add | |
1121 | def _stepfn(me, step): | |
1122 | if step <= 0: | |
1c7419c9 | 1123 | raise ValueError('step must be positive') |
d7ab1bab | 1124 | if step <= MPW_MAX: |
1125 | return lambda f: f.step(step) | |
1126 | j = PrimeFilter(step) | |
1127 | return lambda f: f.jump(j) | |
1128 | def pg_begin(me, ev): | |
1129 | x = ev.x | |
1130 | me.lf = PrimeFilter(x) | |
1131 | me.hf = PrimeFilter(x * me.mul + me.add) | |
1132 | me.lstep = me._stepfn(me.step) | |
1133 | me.hstep = me._stepfn(me.step * me.mul) | |
1134 | SimulStepper._cont(me, ev) | |
1135 | def pg_try(me, ev): | |
1136 | me._step() | |
1137 | me._cont(ev) | |
1138 | def _step(me): | |
1139 | me.lstep(me.lf) | |
1140 | me.hstep(me.hf) | |
1141 | def _cont(me, ev): | |
1142 | while me.lf.status == PGEN_FAIL or me.hf.status == PGEN_FAIL: | |
1143 | me._step() | |
1144 | if me.lf.status == PGEN_ABORT or me.hf.status == PGEN_ABORT: | |
1145 | return PGEN_ABORT | |
1146 | ev.x = me.lf.x | |
1147 | if me.lf.status == PGEN_DONE and me.hf.status == PGEN_DONE: | |
1148 | return PGEN_DONE | |
1149 | return PGEN_TRY | |
1150 | def pg_done(me, ev): | |
1151 | del me.lf | |
1152 | del me.hf | |
1153 | del me.lstep | |
1154 | del me.hstep | |
1155 | ||
1156 | class SimulTester (PrimeGenEventHandler): | |
1157 | def __init__(me, mul = 2, add = 1): | |
1158 | me.mul = mul | |
1159 | me.add = add | |
1160 | def pg_begin(me, ev): | |
1161 | x = ev.x | |
1162 | me.lr = RabinMiller(x) | |
1163 | me.hr = RabinMiller(x * me.mul + me.add) | |
1164 | def pg_try(me, ev): | |
1165 | lst = me.lr.test(ev.rng.range(me.lr.x)) | |
1166 | if lst != PGEN_PASS and lst != PGEN_DONE: | |
1167 | return lst | |
1168 | rst = me.hr.test(ev.rng.range(me.hr.x)) | |
1169 | if rst != PGEN_PASS and rst != PGEN_DONE: | |
1170 | return rst | |
1171 | if lst == PGEN_DONE and rst == PGEN_DONE: | |
1172 | return PGEN_DONE | |
1173 | return PGEN_PASS | |
1174 | def pg_done(me, ev): | |
1175 | del me.lr | |
1176 | del me.hr | |
1177 | ||
1178 | def sgprime(start, step = 2, name = 'p', event = pgen_nullev, nsteps = 0): | |
1179 | start = MP(start) | |
1180 | return pgen(start, name, SimulStepper(step = step), SimulTester(), event, | |
00401529 | 1181 | nsteps, RabinMiller.iters(start.nbits)) |
d7ab1bab | 1182 | |
1183 | def findprimitive(mod, hh = [], exp = None, name = 'g', event = pgen_nullev): | |
1184 | return pgen(0, name, PrimitiveStepper(), PrimitiveTester(mod, hh, exp), | |
00401529 | 1185 | event, 0, 1) |
d7ab1bab | 1186 | |
1187 | def kcdsaprime(pbits, qbits, rng = rand, | |
00401529 | 1188 | event = pgen_nullev, name = 'p', nsteps = 0): |
a5fdb912 MW |
1189 | hbits = pbits - qbits - 1 |
1190 | while True: | |
1191 | h = pgen(rng.mp(hbits, 1), name + ' [h]', | |
1192 | PrimeGenStepper(2), PrimeGenTester(), | |
1193 | event, nsteps, RabinMiller.iters(hbits)) | |
1194 | while True: | |
1195 | q0 = rng.mp(qbits, 1) | |
1196 | p0 = 2*q0*h + 1 | |
1197 | if p0.nbits == pbits: break | |
1198 | q = pgen(q0, name, SimulStepper(2*h, 1, 2), | |
1199 | SimulTester(2 * h, 1), event, nsteps, RabinMiller.iters(qbits)) | |
1200 | p = 2*q*h + 1 | |
1201 | if q.nbits == qbits and p.nbits == pbits: return p, q, h | |
1202 | elif nsteps: raise ValueError("prime generation failed") | |
d7ab1bab | 1203 | |
1204 | #----- That's all, folks ---------------------------------------------------- |