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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 | import _base |
29 | import types as _types | |
30 | from binascii import hexlify as _hexify, unhexlify as _unhexify | |
6bd22b53 | 31 | from contextlib import contextmanager as _ctxmgr |
46e6ad89 | 32 | from sys import argv as _argv |
6bd22b53 | 33 | from struct import pack as _pack |
46e6ad89 | 34 | |
00401529 MW |
35 | ###-------------------------------------------------------------------------- |
36 | ### Basic stuff. | |
ed8cc62d MW |
37 | |
38 | ## For the benefit of the default keyreporter, we need the program na,e. | |
46e6ad89 | 39 | _base._ego(_argv[0]) |
d7ab1bab | 40 | |
837fa485 MW |
41 | ## How to fix a name back into the right identifier. Alas, the rules are not |
42 | ## consistent. | |
43 | def _fixname(name): | |
44 | ||
45 | ## Hyphens consistently become underscores. | |
46 | name = name.replace('-', '_') | |
47 | ||
48 | ## But slashes might become underscores or just vanish. | |
3e80d327 | 49 | if name.startswith('salsa20'): name = name.replace('/', '') |
837fa485 MW |
50 | else: name = name.replace('/', '_') |
51 | ||
52 | ## Done. | |
53 | return name | |
54 | ||
ed8cc62d MW |
55 | ## Initialize the module. Drag in the static methods of the various |
56 | ## classes; create names for the various known crypto algorithms. | |
d7ab1bab | 57 | def _init(): |
58 | d = globals() | |
59 | b = _base.__dict__; | |
60 | for i in b: | |
61 | if i[0] != '_': | |
62 | d[i] = b[i]; | |
5a8b43b3 MW |
63 | for i in ['ByteString', |
64 | 'MP', 'GF', 'Field', | |
00401529 MW |
65 | 'ECPt', 'ECPtCurve', 'ECCurve', 'ECInfo', |
66 | 'DHInfo', 'BinDHInfo', 'RSAPriv', 'BBSPriv', | |
67 | 'PrimeFilter', 'RabinMiller', | |
68 | 'Group', 'GE', | |
89157adc | 69 | 'KeySZ', 'KeyData']: |
d7ab1bab | 70 | c = d[i] |
71 | pre = '_' + i + '_' | |
72 | plen = len(pre) | |
73 | for j in b: | |
74 | if j[:plen] == pre: | |
00401529 | 75 | setattr(c, j[plen:], classmethod(b[j])) |
ed8cc62d MW |
76 | for i in [gcciphers, gchashes, gcmacs, gcprps]: |
77 | for c in i.itervalues(): | |
837fa485 | 78 | d[_fixname(c.name)] = c |
ed8cc62d | 79 | for c in gccrands.itervalues(): |
837fa485 | 80 | d[_fixname(c.name + 'rand')] = c |
d7ab1bab | 81 | _init() |
82 | ||
ed8cc62d MW |
83 | ## A handy function for our work: add the methods of a named class to an |
84 | ## existing class. This is how we write the Python-implemented parts of our | |
85 | ## mostly-C types. | |
d7ab1bab | 86 | def _augment(c, cc): |
87 | for i in cc.__dict__: | |
88 | a = cc.__dict__[i] | |
89 | if type(a) is _types.MethodType: | |
90 | a = a.im_func | |
91 | elif type(a) not in (_types.FunctionType, staticmethod, classmethod): | |
92 | continue | |
93 | setattr(c, i, a) | |
94 | ||
ed8cc62d MW |
95 | ## Parsing functions tend to return the object parsed and the remainder of |
96 | ## the input. This checks that the remainder is input and, if so, returns | |
97 | ## just the object. | |
98 | def _checkend(r): | |
99 | x, rest = r | |
100 | if rest != '': | |
101 | raise SyntaxError, 'junk at end of string' | |
102 | return x | |
103 | ||
96d7ed6c | 104 | ## Some pretty-printing utilities. |
652e16ea | 105 | PRINT_SECRETS = False |
330e6a74 | 106 | def _clsname(me): return type(me).__name__ |
652e16ea MW |
107 | def _repr_secret(thing, secretp = True): |
108 | if not secretp or PRINT_SECRETS: return repr(thing) | |
109 | else: return '#<SECRET>' | |
96d7ed6c | 110 | def _pp_str(me, pp, cyclep): pp.text(cyclep and '...' or str(me)) |
652e16ea MW |
111 | def _pp_secret(pp, thing, secretp = True): |
112 | if not secretp or PRINT_SECRETS: pp.pretty(thing) | |
113 | else: pp.text('#<SECRET>') | |
582568f1 MW |
114 | def _pp_bgroup(pp, text): |
115 | ind = len(text) | |
116 | pp.begin_group(ind, text) | |
117 | return ind | |
118 | def _pp_bgroup_tyname(pp, obj, open = '('): | |
330e6a74 | 119 | return _pp_bgroup(pp, _clsname(obj) + open) |
652e16ea | 120 | def _pp_kv(pp, k, v, secretp = False): |
582568f1 | 121 | ind = _pp_bgroup(pp, k + ' = ') |
652e16ea | 122 | _pp_secret(pp, v, secretp) |
96d7ed6c MW |
123 | pp.end_group(ind, '') |
124 | def _pp_commas(pp, printfn, items): | |
125 | firstp = True | |
126 | for i in items: | |
127 | if firstp: firstp = False | |
128 | else: pp.text(','); pp.breakable() | |
129 | printfn(i) | |
130 | def _pp_dict(pp, items): | |
131 | def p((k, v)): | |
582568f1 | 132 | pp.begin_group(0) |
96d7ed6c MW |
133 | pp.pretty(k) |
134 | pp.text(':') | |
582568f1 | 135 | pp.begin_group(2) |
96d7ed6c MW |
136 | pp.breakable() |
137 | pp.pretty(v) | |
582568f1 MW |
138 | pp.end_group(2) |
139 | pp.end_group(0) | |
96d7ed6c MW |
140 | _pp_commas(pp, p, items) |
141 | ||
00401529 MW |
142 | ###-------------------------------------------------------------------------- |
143 | ### Bytestrings. | |
ed8cc62d | 144 | |
d7ab1bab | 145 | class _tmp: |
146 | def fromhex(x): | |
147 | return ByteString(_unhexify(x)) | |
148 | fromhex = staticmethod(fromhex) | |
149 | def __hex__(me): | |
150 | return _hexify(me) | |
151 | def __repr__(me): | |
152 | return 'bytes(%r)' % hex(me) | |
153 | _augment(ByteString, _tmp) | |
bfb450cc | 154 | ByteString.__hash__ = str.__hash__ |
d7ab1bab | 155 | bytes = ByteString.fromhex |
156 | ||
00401529 | 157 | ###-------------------------------------------------------------------------- |
bfb450cc MW |
158 | ### Hashing. |
159 | ||
160 | class _tmp: | |
161 | def check(me, h): | |
162 | hh = me.done() | |
163 | return ctstreq(h, hh) | |
164 | _augment(GHash, _tmp) | |
165 | _augment(Poly1305Hash, _tmp) | |
166 | ||
6bd22b53 MW |
167 | class _HashBase (object): |
168 | ## The standard hash methods. Assume that `hash' is defined and returns | |
169 | ## the receiver. | |
170 | def hashu8(me, n): return me.hash(_pack('B', n)) | |
171 | def hashu16l(me, n): return me.hash(_pack('<H', n)) | |
172 | def hashu16b(me, n): return me.hash(_pack('>H', n)) | |
173 | hashu16 = hashu16b | |
174 | def hashu32l(me, n): return me.hash(_pack('<L', n)) | |
175 | def hashu32b(me, n): return me.hash(_pack('>L', n)) | |
176 | hashu32 = hashu32b | |
177 | def hashu64l(me, n): return me.hash(_pack('<Q', n)) | |
178 | def hashu64b(me, n): return me.hash(_pack('>Q', n)) | |
179 | hashu64 = hashu64b | |
180 | def hashbuf8(me, s): return me.hashu8(len(s)).hash(s) | |
181 | def hashbuf16l(me, s): return me.hashu16l(len(s)).hash(s) | |
182 | def hashbuf16b(me, s): return me.hashu16b(len(s)).hash(s) | |
183 | hashbuf16 = hashbuf16b | |
184 | def hashbuf32l(me, s): return me.hashu32l(len(s)).hash(s) | |
185 | def hashbuf32b(me, s): return me.hashu32b(len(s)).hash(s) | |
186 | hashbuf32 = hashbuf32b | |
187 | def hashbuf64l(me, s): return me.hashu64l(len(s)).hash(s) | |
188 | def hashbuf64b(me, s): return me.hashu64b(len(s)).hash(s) | |
189 | hashbuf64 = hashbuf64b | |
190 | def hashstrz(me, s): return me.hash(s).hashu8(0) | |
191 | ||
192 | class _ShakeBase (_HashBase): | |
193 | ||
194 | ## Python gets really confused if I try to augment `__new__' on native | |
195 | ## classes, so wrap and delegate. Sorry. | |
196 | def __init__(me, perso = '', *args, **kw): | |
197 | super(_ShakeBase, me).__init__(*args, **kw) | |
198 | me._h = me._SHAKE(perso = perso, func = me._FUNC) | |
199 | ||
200 | ## Delegate methods... | |
201 | def copy(me): new = me.__class__(); new._copy(me) | |
202 | def _copy(me, other): me._h = other._h | |
203 | def hash(me, m): me._h.hash(m); return me | |
204 | def xof(me): me._h.xof(); return me | |
205 | def get(me, n): return me._h.get(n) | |
206 | def mask(me, m): return me._h.mask(m) | |
207 | def done(me, n): return me._h.done(n) | |
208 | def check(me, h): return ctstreq(h, me.done(len(h))) | |
209 | @property | |
210 | def state(me): return me._h.state | |
211 | @property | |
212 | def buffered(me): return me._h.buffered | |
213 | @property | |
214 | def rate(me): return me._h.rate | |
215 | ||
216 | class _tmp: | |
217 | def check(me, h): | |
218 | return ctstreq(h, me.done(len(h))) | |
219 | def leftenc(me, n): | |
220 | nn = MP(n).storeb() | |
221 | return me.hashu8(len(nn)).hash(nn) | |
222 | def rightenc(me, n): | |
223 | nn = MP(n).storeb() | |
224 | return me.hash(nn).hashu8(len(nn)) | |
225 | def stringenc(me, str): | |
226 | return me.leftenc(8*len(str)).hash(str) | |
227 | def bytepad_before(me): | |
228 | return me.leftenc(me.rate) | |
229 | def bytepad_after(me): | |
230 | if me.buffered: me.hash(me._Z[:me.rate - me.buffered]) | |
231 | return me | |
232 | @_ctxmgr | |
233 | def bytepad(me): | |
234 | me.bytepad_before() | |
235 | yield me | |
236 | me.bytepad_after() | |
237 | _augment(Shake, _tmp) | |
238 | _augment(_ShakeBase, _tmp) | |
239 | Shake._Z = _ShakeBase._Z = ByteString(200*'\0') | |
240 | ||
241 | class KMAC (_ShakeBase): | |
242 | _FUNC = 'KMAC' | |
243 | def __init__(me, k, *arg, **kw): | |
244 | super(KMAC, me).__init__(*arg, **kw) | |
245 | with me.bytepad(): me.stringenc(k) | |
246 | def done(me, n = -1): | |
247 | if n < 0: n = me._TAGSZ | |
248 | me.rightenc(8*n) | |
249 | return super(KMAC, me).done(n) | |
250 | def xof(me): | |
251 | me.rightenc(0) | |
252 | return super(KMAC, me).xof() | |
253 | ||
254 | class KMAC128 (KMAC): _SHAKE = Shake128; _TAGSZ = 16 | |
255 | class KMAC256 (KMAC): _SHAKE = Shake256; _TAGSZ = 32 | |
256 | ||
bfb450cc | 257 | ###-------------------------------------------------------------------------- |
ce0340b6 MW |
258 | ### NaCl `secretbox'. |
259 | ||
260 | def secret_box(k, n, m): | |
261 | E = xsalsa20(k).setiv(n) | |
262 | r = E.enczero(poly1305.keysz.default) | |
263 | s = E.enczero(poly1305.masksz) | |
264 | y = E.encrypt(m) | |
265 | t = poly1305(r)(s).hash(y).done() | |
266 | return ByteString(t + y) | |
267 | ||
268 | def secret_unbox(k, n, c): | |
269 | E = xsalsa20(k).setiv(n) | |
270 | r = E.enczero(poly1305.keysz.default) | |
271 | s = E.enczero(poly1305.masksz) | |
272 | y = c[poly1305.tagsz:] | |
273 | if not poly1305(r)(s).hash(y).check(c[0:poly1305.tagsz]): | |
274 | raise ValueError, 'decryption failed' | |
275 | return E.decrypt(c[poly1305.tagsz:]) | |
276 | ||
277 | ###-------------------------------------------------------------------------- | |
00401529 | 278 | ### Multiprecision integers and binary polynomials. |
ed8cc62d | 279 | |
2ef393b5 | 280 | def _split_rat(x): |
83c77564 | 281 | if isinstance(x, BaseRat): return x._n, x._d |
2ef393b5 | 282 | else: return x, 1 |
83c77564 MW |
283 | class BaseRat (object): |
284 | """Base class implementing fields of fractions over Euclidean domains.""" | |
2ef393b5 | 285 | def __new__(cls, a, b): |
83c77564 | 286 | a, b = cls.RING(a), cls.RING(b) |
2ef393b5 MW |
287 | q, r = divmod(a, b) |
288 | if r == 0: return q | |
289 | g = b.gcd(r) | |
83c77564 | 290 | me = super(BaseRat, cls).__new__(cls) |
2ef393b5 MW |
291 | me._n = a//g |
292 | me._d = b//g | |
293 | return me | |
294 | @property | |
295 | def numer(me): return me._n | |
296 | @property | |
297 | def denom(me): return me._d | |
298 | def __str__(me): return '%s/%s' % (me._n, me._d) | |
330e6a74 | 299 | def __repr__(me): return '%s(%s, %s)' % (_clsname(me), me._n, me._d) |
96d7ed6c | 300 | _repr_pretty_ = _pp_str |
2ef393b5 MW |
301 | |
302 | def __add__(me, you): | |
303 | n, d = _split_rat(you) | |
83c77564 | 304 | return type(me)(me._n*d + n*me._d, d*me._d) |
2ef393b5 MW |
305 | __radd__ = __add__ |
306 | def __sub__(me, you): | |
307 | n, d = _split_rat(you) | |
83c77564 | 308 | return type(me)(me._n*d - n*me._d, d*me._d) |
2ef393b5 MW |
309 | def __rsub__(me, you): |
310 | n, d = _split_rat(you) | |
83c77564 | 311 | return type(me)(n*me._d - me._n*d, d*me._d) |
2ef393b5 MW |
312 | def __mul__(me, you): |
313 | n, d = _split_rat(you) | |
83c77564 | 314 | return type(me)(me._n*n, me._d*d) |
08041ebb | 315 | __rmul__ = __mul__ |
b47818ea | 316 | def __truediv__(me, you): |
2ef393b5 | 317 | n, d = _split_rat(you) |
83c77564 | 318 | return type(me)(me._n*d, me._d*n) |
b47818ea | 319 | def __rtruediv__(me, you): |
2ef393b5 | 320 | n, d = _split_rat(you) |
83c77564 | 321 | return type(me)(me._d*n, me._n*d) |
b47818ea MW |
322 | __div__ = __truediv__ |
323 | __rdiv__ = __rtruediv__ | |
2ef393b5 MW |
324 | def __cmp__(me, you): |
325 | n, d = _split_rat(you) | |
7051e349 | 326 | return cmp(me._n*d, n*me._d) |
2ef393b5 MW |
327 | def __rcmp__(me, you): |
328 | n, d = _split_rat(you) | |
329 | return cmp(n*me._d, me._n*d) | |
330 | ||
83c77564 MW |
331 | class IntRat (BaseRat): |
332 | RING = MP | |
333 | ||
334 | class GFRat (BaseRat): | |
335 | RING = GF | |
336 | ||
d7ab1bab | 337 | class _tmp: |
338 | def negp(x): return x < 0 | |
339 | def posp(x): return x > 0 | |
340 | def zerop(x): return x == 0 | |
341 | def oddp(x): return x.testbit(0) | |
342 | def evenp(x): return not x.testbit(0) | |
343 | def mont(x): return MPMont(x) | |
344 | def barrett(x): return MPBarrett(x) | |
345 | def reduce(x): return MPReduce(x) | |
b47818ea MW |
346 | def __truediv__(me, you): return IntRat(me, you) |
347 | def __rtruediv__(me, you): return IntRat(you, me) | |
348 | __div__ = __truediv__ | |
349 | __rdiv__ = __rtruediv__ | |
96d7ed6c | 350 | _repr_pretty_ = _pp_str |
d7ab1bab | 351 | _augment(MP, _tmp) |
352 | ||
d7ab1bab | 353 | class _tmp: |
fbc145f3 | 354 | def zerop(x): return x == 0 |
ed8cc62d | 355 | def reduce(x): return GFReduce(x) |
fbc145f3 MW |
356 | def trace(x, y): return x.reduce().trace(y) |
357 | def halftrace(x, y): return x.reduce().halftrace(y) | |
358 | def modsqrt(x, y): return x.reduce().sqrt(y) | |
359 | def quadsolve(x, y): return x.reduce().quadsolve(y) | |
b47818ea MW |
360 | def __truediv__(me, you): return GFRat(me, you) |
361 | def __rtruediv__(me, you): return GFRat(you, me) | |
362 | __div__ = __truediv__ | |
363 | __rdiv__ = __rtruediv__ | |
96d7ed6c | 364 | _repr_pretty_ = _pp_str |
d7ab1bab | 365 | _augment(GF, _tmp) |
366 | ||
367 | class _tmp: | |
ed8cc62d MW |
368 | def product(*arg): |
369 | 'product(ITERABLE) or product(I, ...) -> PRODUCT' | |
370 | return MPMul(*arg).done() | |
371 | product = staticmethod(product) | |
372 | _augment(MPMul, _tmp) | |
373 | ||
00401529 MW |
374 | ###-------------------------------------------------------------------------- |
375 | ### Abstract fields. | |
ed8cc62d MW |
376 | |
377 | class _tmp: | |
d7ab1bab | 378 | def fromstring(str): return _checkend(Field.parse(str)) |
379 | fromstring = staticmethod(fromstring) | |
380 | _augment(Field, _tmp) | |
381 | ||
382 | class _tmp: | |
330e6a74 | 383 | def __repr__(me): return '%s(%sL)' % (_clsname(me), me.p) |
6d481bc6 | 384 | def __hash__(me): return 0x114401de ^ hash(me.p) |
96d7ed6c | 385 | def _repr_pretty_(me, pp, cyclep): |
582568f1 MW |
386 | ind = _pp_bgroup_tyname(pp, me) |
387 | if cyclep: pp.text('...') | |
388 | else: pp.pretty(me.p) | |
389 | pp.end_group(ind, ')') | |
d7ab1bab | 390 | def ec(me, a, b): return ECPrimeProjCurve(me, a, b) |
391 | _augment(PrimeField, _tmp) | |
392 | ||
393 | class _tmp: | |
330e6a74 | 394 | def __repr__(me): return '%s(%#xL)' % (_clsname(me), me.p) |
d7ab1bab | 395 | def ec(me, a, b): return ECBinProjCurve(me, a, b) |
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.text('%#x' % me.p) | |
400 | pp.end_group(ind, ')') | |
d7ab1bab | 401 | _augment(BinField, _tmp) |
402 | ||
403 | class _tmp: | |
6d481bc6 MW |
404 | def __hash__(me): return 0x23e4701c ^ hash(me.p) |
405 | _augment(BinPolyField, _tmp) | |
406 | ||
407 | class _tmp: | |
408 | def __hash__(me): | |
409 | h = 0x9a7d6240 | |
410 | h ^= hash(me.p) | |
411 | h ^= 2*hash(me.beta) & 0xffffffff | |
412 | return h | |
413 | _augment(BinNormField, _tmp) | |
414 | ||
415 | class _tmp: | |
d7ab1bab | 416 | def __str__(me): return str(me.value) |
417 | def __repr__(me): return '%s(%s)' % (repr(me.field), repr(me.value)) | |
96d7ed6c | 418 | _repr_pretty_ = _pp_str |
d7ab1bab | 419 | _augment(FE, _tmp) |
420 | ||
00401529 MW |
421 | ###-------------------------------------------------------------------------- |
422 | ### Elliptic curves. | |
d7ab1bab | 423 | |
424 | class _tmp: | |
425 | def __repr__(me): | |
330e6a74 | 426 | return '%s(%r, %s, %s)' % (_clsname(me), me.field, me.a, me.b) |
96d7ed6c | 427 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 428 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 429 | if cyclep: |
582568f1 | 430 | pp.text('...') |
96d7ed6c | 431 | else: |
96d7ed6c MW |
432 | pp.pretty(me.field); pp.text(','); pp.breakable() |
433 | pp.pretty(me.a); pp.text(','); pp.breakable() | |
434 | pp.pretty(me.b) | |
582568f1 | 435 | pp.end_group(ind, ')') |
d7ab1bab | 436 | def frombuf(me, s): |
437 | return ecpt.frombuf(me, s) | |
438 | def fromraw(me, s): | |
439 | return ecpt.fromraw(me, s) | |
440 | def pt(me, *args): | |
5f959e50 | 441 | return me(*args) |
d7ab1bab | 442 | _augment(ECCurve, _tmp) |
443 | ||
444 | class _tmp: | |
6d481bc6 MW |
445 | def __hash__(me): |
446 | h = 0x6751d341 | |
447 | h ^= hash(me.field) | |
448 | h ^= 2*hash(me.a) ^ 0xffffffff | |
449 | h ^= 5*hash(me.b) ^ 0xffffffff | |
450 | return h | |
451 | _augment(ECPrimeCurve, _tmp) | |
452 | ||
453 | class _tmp: | |
454 | def __hash__(me): | |
455 | h = 0x2ac203c5 | |
456 | h ^= hash(me.field) | |
457 | h ^= 2*hash(me.a) ^ 0xffffffff | |
458 | h ^= 5*hash(me.b) ^ 0xffffffff | |
459 | return h | |
460 | _augment(ECBinCurve, _tmp) | |
461 | ||
462 | class _tmp: | |
d7ab1bab | 463 | def __repr__(me): |
330e6a74 MW |
464 | if not me: return '%s()' % _clsname(me) |
465 | return '%s(%s, %s)' % (_clsname(me), me.ix, me.iy) | |
d7ab1bab | 466 | def __str__(me): |
467 | if not me: return 'inf' | |
468 | return '(%s, %s)' % (me.ix, me.iy) | |
96d7ed6c MW |
469 | def _repr_pretty_(me, pp, cyclep): |
470 | if cyclep: | |
471 | pp.text('...') | |
472 | elif not me: | |
473 | pp.text('inf') | |
474 | else: | |
582568f1 | 475 | ind = _pp_bgroup(pp, '(') |
96d7ed6c MW |
476 | pp.pretty(me.ix); pp.text(','); pp.breakable() |
477 | pp.pretty(me.iy) | |
582568f1 | 478 | pp.end_group(ind, ')') |
d7ab1bab | 479 | _augment(ECPt, _tmp) |
480 | ||
481 | class _tmp: | |
482 | def __repr__(me): | |
330e6a74 MW |
483 | return '%s(curve = %r, G = %r, r = %s, h = %s)' % \ |
484 | (_clsname(me), me.curve, me.G, me.r, me.h) | |
96d7ed6c | 485 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 486 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 487 | if cyclep: |
582568f1 | 488 | pp.text('...') |
96d7ed6c | 489 | else: |
96d7ed6c MW |
490 | _pp_kv(pp, 'curve', me.curve); pp.text(','); pp.breakable() |
491 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
492 | _pp_kv(pp, 'r', me.r); pp.text(','); pp.breakable() | |
493 | _pp_kv(pp, 'h', me.h) | |
582568f1 | 494 | pp.end_group(ind, ')') |
6d481bc6 MW |
495 | def __hash__(me): |
496 | h = 0x9bedb8de | |
497 | h ^= hash(me.curve) | |
498 | h ^= 2*hash(me.G) & 0xffffffff | |
499 | return h | |
d7ab1bab | 500 | def group(me): |
501 | return ECGroup(me) | |
502 | _augment(ECInfo, _tmp) | |
503 | ||
504 | class _tmp: | |
505 | def __repr__(me): | |
506 | if not me: return '%r()' % (me.curve) | |
507 | return '%r(%s, %s)' % (me.curve, me.x, me.y) | |
508 | def __str__(me): | |
509 | if not me: return 'inf' | |
510 | return '(%s, %s)' % (me.x, me.y) | |
7a7aa30e MW |
511 | def _repr_pretty_(me, pp, cyclep): |
512 | if cyclep: | |
513 | pp.text('...') | |
514 | elif not me: | |
515 | pp.text('inf') | |
516 | else: | |
517 | ind = _pp_bgroup(pp, '(') | |
518 | pp.pretty(me.x); pp.text(','); pp.breakable() | |
519 | pp.pretty(me.y) | |
520 | pp.end_group(ind, ')') | |
d7ab1bab | 521 | _augment(ECPtCurve, _tmp) |
522 | ||
00401529 MW |
523 | ###-------------------------------------------------------------------------- |
524 | ### Key sizes. | |
ed8cc62d | 525 | |
d7ab1bab | 526 | class _tmp: |
330e6a74 | 527 | def __repr__(me): return '%s(%d)' % (_clsname(me), me.default) |
d7ab1bab | 528 | def check(me, sz): return True |
529 | def best(me, sz): return sz | |
530 | _augment(KeySZAny, _tmp) | |
531 | ||
532 | class _tmp: | |
533 | def __repr__(me): | |
330e6a74 MW |
534 | return '%s(%d, %d, %d, %d)' % \ |
535 | (_clsname(me), me.default, me.min, me.max, me.mod) | |
96d7ed6c | 536 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 537 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 538 | if cyclep: |
582568f1 | 539 | pp.text('...') |
96d7ed6c | 540 | else: |
96d7ed6c MW |
541 | pp.pretty(me.default); pp.text(','); pp.breakable() |
542 | pp.pretty(me.min); pp.text(','); pp.breakable() | |
543 | pp.pretty(me.max); pp.text(','); pp.breakable() | |
544 | pp.pretty(me.mod) | |
582568f1 | 545 | pp.end_group(ind, ')') |
d7ab1bab | 546 | def check(me, sz): return me.min <= sz <= me.max and sz % me.mod == 0 |
547 | def best(me, sz): | |
548 | if sz < me.min: raise ValueError, 'key too small' | |
549 | elif sz > me.max: return me.max | |
550 | else: return sz - (sz % me.mod) | |
551 | _augment(KeySZRange, _tmp) | |
552 | ||
553 | class _tmp: | |
330e6a74 | 554 | def __repr__(me): return '%s(%d, %s)' % (_clsname(me), me.default, me.set) |
96d7ed6c | 555 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 556 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 557 | if cyclep: |
582568f1 | 558 | pp.text('...') |
96d7ed6c | 559 | else: |
96d7ed6c | 560 | pp.pretty(me.default); pp.text(','); pp.breakable() |
582568f1 | 561 | ind1 = _pp_bgroup(pp, '{') |
96d7ed6c | 562 | _pp_commas(pp, pp.pretty, me.set) |
582568f1 MW |
563 | pp.end_group(ind1, '}') |
564 | pp.end_group(ind, ')') | |
d7ab1bab | 565 | def check(me, sz): return sz in me.set |
566 | def best(me, sz): | |
567 | found = -1 | |
568 | for i in me.set: | |
569 | if found < i <= sz: found = i | |
570 | if found < 0: raise ValueError, 'key too small' | |
571 | return found | |
572 | _augment(KeySZSet, _tmp) | |
573 | ||
00401529 | 574 | ###-------------------------------------------------------------------------- |
96d7ed6c MW |
575 | ### Key data objects. |
576 | ||
577 | class _tmp: | |
330e6a74 | 578 | def __repr__(me): return '%s(%r)' % (_clsname(me), me.name) |
96d7ed6c MW |
579 | _augment(KeyFile, _tmp) |
580 | ||
581 | class _tmp: | |
330e6a74 | 582 | def __repr__(me): return '%s(%r)' % (_clsname(me), me.fulltag) |
96d7ed6c MW |
583 | _augment(Key, _tmp) |
584 | ||
585 | class _tmp: | |
586 | def __repr__(me): | |
330e6a74 MW |
587 | return '%s({%s})' % (_clsname(me), |
588 | ', '.join(['%r: %r' % kv for kv in me.iteritems()])) | |
96d7ed6c | 589 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 590 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c MW |
591 | if cyclep: pp.text('...') |
592 | else: _pp_dict(pp, me.iteritems()) | |
582568f1 | 593 | pp.end_group(ind, ')') |
96d7ed6c MW |
594 | _augment(KeyAttributes, _tmp) |
595 | ||
596 | class _tmp: | |
849e8a20 | 597 | def __repr__(me): |
652e16ea MW |
598 | return '%s(%s, %r)' % (_clsname(me), |
599 | _repr_secret(me._guts(), | |
600 | not (me.flags & KF_NONSECRET)), | |
601 | me.writeflags(me.flags)) | |
96d7ed6c | 602 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 603 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 604 | if cyclep: |
582568f1 | 605 | pp.text('...') |
96d7ed6c | 606 | else: |
652e16ea MW |
607 | _pp_secret(pp, me._guts(), not (me.flags & KF_NONSECRET)) |
608 | pp.text(','); pp.breakable() | |
96d7ed6c | 609 | pp.pretty(me.writeflags(me.flags)) |
582568f1 | 610 | pp.end_group(ind, ')') |
849e8a20 MW |
611 | _augment(KeyData, _tmp) |
612 | ||
613 | class _tmp: | |
614 | def _guts(me): return me.bin | |
96d7ed6c MW |
615 | _augment(KeyDataBinary, _tmp) |
616 | ||
617 | class _tmp: | |
849e8a20 | 618 | def _guts(me): return me.ct |
96d7ed6c MW |
619 | _augment(KeyDataEncrypted, _tmp) |
620 | ||
621 | class _tmp: | |
849e8a20 | 622 | def _guts(me): return me.mp |
96d7ed6c MW |
623 | _augment(KeyDataMP, _tmp) |
624 | ||
625 | class _tmp: | |
849e8a20 | 626 | def _guts(me): return me.str |
96d7ed6c MW |
627 | _augment(KeyDataString, _tmp) |
628 | ||
629 | class _tmp: | |
849e8a20 | 630 | def _guts(me): return me.ecpt |
96d7ed6c MW |
631 | _augment(KeyDataECPt, _tmp) |
632 | ||
633 | class _tmp: | |
634 | def __repr__(me): | |
330e6a74 MW |
635 | return '%s({%s})' % (_clsname(me), |
636 | ', '.join(['%r: %r' % kv for kv in me.iteritems()])) | |
96d7ed6c | 637 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 638 | ind = _pp_bgroup_tyname(pp, me, '({ ') |
96d7ed6c MW |
639 | if cyclep: pp.text('...') |
640 | else: _pp_dict(pp, me.iteritems()) | |
582568f1 | 641 | pp.end_group(ind, ' })') |
96d7ed6c MW |
642 | _augment(KeyDataStructured, _tmp) |
643 | ||
644 | ###-------------------------------------------------------------------------- | |
00401529 | 645 | ### Abstract groups. |
ed8cc62d | 646 | |
d7ab1bab | 647 | class _tmp: |
648 | def __repr__(me): | |
330e6a74 | 649 | return '%s(p = %s, r = %s, g = %s)' % (_clsname(me), me.p, me.r, me.g) |
96d7ed6c | 650 | def _repr_pretty_(me, pp, cyclep): |
582568f1 | 651 | ind = _pp_bgroup_tyname(pp, me) |
96d7ed6c | 652 | if cyclep: |
582568f1 | 653 | pp.text('...') |
96d7ed6c | 654 | else: |
96d7ed6c MW |
655 | _pp_kv(pp, 'p', me.p); pp.text(','); pp.breakable() |
656 | _pp_kv(pp, 'r', me.r); pp.text(','); pp.breakable() | |
657 | _pp_kv(pp, 'g', me.g) | |
582568f1 | 658 | pp.end_group(ind, ')') |
d7ab1bab | 659 | _augment(FGInfo, _tmp) |
660 | ||
661 | class _tmp: | |
662 | def group(me): return PrimeGroup(me) | |
663 | _augment(DHInfo, _tmp) | |
664 | ||
665 | class _tmp: | |
666 | def group(me): return BinGroup(me) | |
667 | _augment(BinDHInfo, _tmp) | |
668 | ||
669 | class _tmp: | |
670 | def __repr__(me): | |
330e6a74 | 671 | return '%s(%r)' % (_clsname(me), me.info) |
99d932fe MW |
672 | def _repr_pretty_(me, pp, cyclep): |
673 | ind = _pp_bgroup_tyname(pp, me) | |
674 | if cyclep: pp.text('...') | |
675 | else: pp.pretty(me.info) | |
676 | pp.end_group(ind, ')') | |
d7ab1bab | 677 | _augment(Group, _tmp) |
678 | ||
679 | class _tmp: | |
6d481bc6 MW |
680 | def __hash__(me): |
681 | info = me.info | |
682 | h = 0xbce3cfe6 | |
683 | h ^= hash(info.p) | |
684 | h ^= 2*hash(info.r) & 0xffffffff | |
685 | h ^= 5*hash(info.g) & 0xffffffff | |
686 | return h | |
d7012c2b | 687 | def _get_geval(me, x): return MP(x) |
6d481bc6 MW |
688 | _augment(PrimeGroup, _tmp) |
689 | ||
690 | class _tmp: | |
691 | def __hash__(me): | |
692 | info = me.info | |
693 | h = 0x80695949 | |
694 | h ^= hash(info.p) | |
695 | h ^= 2*hash(info.r) & 0xffffffff | |
696 | h ^= 5*hash(info.g) & 0xffffffff | |
697 | return h | |
d7012c2b | 698 | def _get_geval(me, x): return GF(x) |
6d481bc6 MW |
699 | _augment(BinGroup, _tmp) |
700 | ||
701 | class _tmp: | |
702 | def __hash__(me): return 0x0ec23dab ^ hash(me.info) | |
d7012c2b | 703 | def _get_geval(me, x): return x.toec() |
6d481bc6 MW |
704 | _augment(ECGroup, _tmp) |
705 | ||
706 | class _tmp: | |
d7ab1bab | 707 | def __repr__(me): |
708 | return '%r(%r)' % (me.group, str(me)) | |
d7012c2b MW |
709 | def _repr_pretty_(me, pp, cyclep): |
710 | pp.pretty(type(me)._get_geval(me)) | |
d7ab1bab | 711 | _augment(GE, _tmp) |
712 | ||
00401529 MW |
713 | ###-------------------------------------------------------------------------- |
714 | ### RSA encoding techniques. | |
ed8cc62d MW |
715 | |
716 | class PKCS1Crypt (object): | |
d7ab1bab | 717 | def __init__(me, ep = '', rng = rand): |
718 | me.ep = ep | |
719 | me.rng = rng | |
720 | def encode(me, msg, nbits): | |
721 | return _base._p1crypt_encode(msg, nbits, me.ep, me.rng) | |
722 | def decode(me, ct, nbits): | |
723 | return _base._p1crypt_decode(ct, nbits, me.ep, me.rng) | |
724 | ||
ed8cc62d | 725 | class PKCS1Sig (object): |
d7ab1bab | 726 | def __init__(me, ep = '', rng = rand): |
727 | me.ep = ep | |
728 | me.rng = rng | |
729 | def encode(me, msg, nbits): | |
730 | return _base._p1sig_encode(msg, nbits, me.ep, me.rng) | |
731 | def decode(me, msg, sig, nbits): | |
732 | return _base._p1sig_decode(msg, sig, nbits, me.ep, me.rng) | |
733 | ||
ed8cc62d | 734 | class OAEP (object): |
d7ab1bab | 735 | def __init__(me, mgf = sha_mgf, hash = sha, ep = '', rng = rand): |
736 | me.mgf = mgf | |
737 | me.hash = hash | |
738 | me.ep = ep | |
739 | me.rng = rng | |
740 | def encode(me, msg, nbits): | |
741 | return _base._oaep_encode(msg, nbits, me.mgf, me.hash, me.ep, me.rng) | |
742 | def decode(me, ct, nbits): | |
743 | return _base._oaep_decode(ct, nbits, me.mgf, me.hash, me.ep, me.rng) | |
744 | ||
ed8cc62d | 745 | class PSS (object): |
d7ab1bab | 746 | def __init__(me, mgf = sha_mgf, hash = sha, saltsz = None, rng = rand): |
747 | me.mgf = mgf | |
748 | me.hash = hash | |
749 | if saltsz is None: | |
750 | saltsz = hash.hashsz | |
751 | me.saltsz = saltsz | |
752 | me.rng = rng | |
753 | def encode(me, msg, nbits): | |
754 | return _base._pss_encode(msg, nbits, me.mgf, me.hash, me.saltsz, me.rng) | |
755 | def decode(me, msg, sig, nbits): | |
756 | return _base._pss_decode(msg, sig, nbits, | |
00401529 | 757 | me.mgf, me.hash, me.saltsz, me.rng) |
d7ab1bab | 758 | |
759 | class _tmp: | |
760 | def encrypt(me, msg, enc): | |
761 | return me.pubop(enc.encode(msg, me.n.nbits)) | |
762 | def verify(me, msg, sig, enc): | |
763 | if msg is None: return enc.decode(msg, me.pubop(sig), me.n.nbits) | |
764 | try: | |
765 | x = enc.decode(msg, me.pubop(sig), me.n.nbits) | |
766 | return x is None or x == msg | |
767 | except ValueError: | |
b2687a0a | 768 | return False |
bbd94558 MW |
769 | def __repr__(me): |
770 | return '%s(n = %r, e = %r)' % (_clsname(me), me.n, me.e) | |
771 | def _repr_pretty_(me, pp, cyclep): | |
772 | ind = _pp_bgroup_tyname(pp, me) | |
773 | if cyclep: | |
774 | pp.text('...') | |
775 | else: | |
776 | _pp_kv(pp, 'n', me.n); pp.text(','); pp.breakable() | |
777 | _pp_kv(pp, 'e', me.e) | |
778 | pp.end_group(ind, ')') | |
d7ab1bab | 779 | _augment(RSAPub, _tmp) |
780 | ||
781 | class _tmp: | |
782 | def decrypt(me, ct, enc): return enc.decode(me.privop(ct), me.n.nbits) | |
783 | def sign(me, msg, enc): return me.privop(enc.encode(msg, me.n.nbits)) | |
bbd94558 MW |
784 | def __repr__(me): |
785 | return '%s(n = %r, e = %r, d = %s, ' \ | |
786 | 'p = %s, q = %s, dp = %s, dq = %s, q_inv = %s)' % \ | |
787 | (_clsname(me), me.n, me.e, | |
788 | _repr_secret(me.d), _repr_secret(me.p), _repr_secret(me.q), | |
789 | _repr_secret(me.dp), _repr_secret(me.dq), _repr_secret(me.q_inv)) | |
790 | def _repr_pretty_(me, pp, cyclep): | |
791 | ind = _pp_bgroup_tyname(pp, me) | |
792 | if cyclep: | |
793 | pp.text('...') | |
794 | else: | |
795 | _pp_kv(pp, 'n', me.n); pp.text(','); pp.breakable() | |
796 | _pp_kv(pp, 'e', me.e); pp.text(','); pp.breakable() | |
797 | _pp_kv(pp, 'd', me.d, secretp = True); pp.text(','); pp.breakable() | |
798 | _pp_kv(pp, 'p', me.p, secretp = True); pp.text(','); pp.breakable() | |
799 | _pp_kv(pp, 'q', me.q, secretp = True); pp.text(','); pp.breakable() | |
800 | _pp_kv(pp, 'dp', me.dp, secretp = True); pp.text(','); pp.breakable() | |
801 | _pp_kv(pp, 'dq', me.dq, secretp = True); pp.text(','); pp.breakable() | |
802 | _pp_kv(pp, 'q_inv', me.q_inv, secretp = True) | |
803 | pp.end_group(ind, ')') | |
d7ab1bab | 804 | _augment(RSAPriv, _tmp) |
805 | ||
00401529 | 806 | ###-------------------------------------------------------------------------- |
bbd94558 MW |
807 | ### DSA and related schemes. |
808 | ||
809 | class _tmp: | |
810 | def __repr__(me): return '%s(G = %r, p = %r)' % (_clsname(me), me.G, me.p) | |
811 | def _repr_pretty_(me, pp, cyclep): | |
812 | ind = _pp_bgroup_tyname(pp, me) | |
813 | if cyclep: | |
814 | pp.text('...') | |
815 | else: | |
816 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
817 | _pp_kv(pp, 'p', me.p) | |
818 | pp.end_group(ind, ')') | |
819 | _augment(DSAPub, _tmp) | |
820 | _augment(KCDSAPub, _tmp) | |
821 | ||
822 | class _tmp: | |
823 | def __repr__(me): return '%s(G = %r, u = %s, p = %r)' % \ | |
824 | (_clsname(me), me.G, _repr_secret(me.u), me.p) | |
825 | def _repr_pretty_(me, pp, cyclep): | |
826 | ind = _pp_bgroup_tyname(pp, me) | |
827 | if cyclep: | |
828 | pp.text('...') | |
829 | else: | |
830 | _pp_kv(pp, 'G', me.G); pp.text(','); pp.breakable() | |
831 | _pp_kv(pp, 'u', me.u, True); pp.text(','); pp.breakable() | |
832 | _pp_kv(pp, 'p', me.p) | |
833 | pp.end_group(ind, ')') | |
834 | _augment(DSAPriv, _tmp) | |
835 | _augment(KCDSAPriv, _tmp) | |
836 | ||
837 | ###-------------------------------------------------------------------------- | |
eb8aa4ec | 838 | ### Bernstein's elliptic curve crypto and related schemes. |
848ba392 | 839 | |
8e6f45a3 MW |
840 | X25519_BASE = MP(9).storel(32) |
841 | X448_BASE = MP(5).storel(56) | |
eb8aa4ec | 842 | |
5a8b43b3 | 843 | Z128 = ByteString.zero(16) |
848ba392 | 844 | |
925aa45b | 845 | class _BasePub (object): |
f40e338b | 846 | def __init__(me, pub, *args, **kw): |
925aa45b MW |
847 | if not me._PUBSZ.check(len(pub)): raise ValueError, 'bad public key' |
848 | super(_BasePub, me).__init__(*args, **kw) | |
848ba392 | 849 | me.pub = pub |
bbd94558 | 850 | def __repr__(me): return '%s(pub = %r)' % (_clsname(me), me.pub) |
925aa45b | 851 | def _pp(me, pp): _pp_kv(pp, 'pub', me.pub) |
bbd94558 MW |
852 | def _repr_pretty_(me, pp, cyclep): |
853 | ind = _pp_bgroup_tyname(pp, me) | |
925aa45b MW |
854 | if cyclep: pp.text('...') |
855 | else: me._pp(pp) | |
bbd94558 | 856 | pp.end_group(ind, ')') |
848ba392 | 857 | |
925aa45b | 858 | class _BasePriv (object): |
f40e338b | 859 | def __init__(me, priv, pub = None, *args, **kw): |
925aa45b MW |
860 | if not me._KEYSZ.check(len(priv)): raise ValueError, 'bad private key' |
861 | if pub is None: pub = me._pubkey(priv) | |
862 | super(_BasePriv, me).__init__(pub = pub, *args, **kw) | |
848ba392 | 863 | me.priv = priv |
925aa45b MW |
864 | @classmethod |
865 | def generate(cls, rng = rand): | |
866 | return cls(rng.block(cls._KEYSZ.default)) | |
867 | def __repr__(me): | |
868 | return '%s(priv = %d, pub = %r)' % \ | |
869 | (_clsname(me), _repr_secret(me.priv), me.pub) | |
870 | def _pp(me, pp): | |
871 | _pp_kv(pp, 'priv', me.priv, secretp = True); pp.text(','); pp.breakable() | |
872 | super(_BasePriv, me)._pp(pp) | |
873 | ||
874 | class _XDHPub (_BasePub): pass | |
875 | ||
876 | class _XDHPriv (_BasePriv): | |
877 | def _pubkey(me, priv): return me._op(priv, me._BASE) | |
848ba392 | 878 | def agree(me, you): return me._op(me.priv, you.pub) |
925aa45b MW |
879 | def boxkey(me, recip): return me._hashkey(me.agree(recip)) |
880 | def box(me, recip, n, m): return secret_box(me.boxkey(recip), n, m) | |
881 | def unbox(me, recip, n, c): return secret_unbox(me.boxkey(recip), n, c) | |
848ba392 | 882 | |
925aa45b MW |
883 | class X25519Pub (_XDHPub): |
884 | _PUBSZ = KeySZSet(X25519_PUBSZ) | |
848ba392 MW |
885 | _BASE = X25519_BASE |
886 | ||
925aa45b MW |
887 | class X25519Priv (_XDHPriv, X25519Pub): |
888 | _KEYSZ = KeySZSet(X25519_KEYSZ) | |
848ba392 MW |
889 | def _op(me, k, X): return x25519(k, X) |
890 | def _hashkey(me, z): return hsalsa20_prf(z, Z128) | |
891 | ||
925aa45b MW |
892 | class X448Pub (_XDHPub): |
893 | _PUBSZ = KeySZSet(X448_PUBSZ) | |
eb8aa4ec MW |
894 | _BASE = X448_BASE |
895 | ||
925aa45b MW |
896 | class X448Priv (_XDHPriv, X448Pub): |
897 | _KEYSZ = KeySZSet(X448_KEYSZ) | |
eb8aa4ec | 898 | def _op(me, k, X): return x448(k, X) |
f1b0cf0d | 899 | def _hashkey(me, z): return Shake256().hash(z).done(salsa20.keysz.default) |
eb8aa4ec | 900 | |
925aa45b | 901 | class _EdDSAPub (_BasePub): |
058f0a00 MW |
902 | def beginhash(me): return me._HASH() |
903 | def endhash(me, h): return h.done() | |
925aa45b MW |
904 | |
905 | class _EdDSAPriv (_BasePriv, _EdDSAPub): | |
906 | pass | |
907 | ||
908 | class Ed25519Pub (_EdDSAPub): | |
909 | _PUBSZ = KeySZSet(ED25519_PUBSZ) | |
058f0a00 | 910 | _HASH = sha512 |
5c4c0231 MW |
911 | def verify(me, msg, sig, **kw): |
912 | return ed25519_verify(me.pub, msg, sig, **kw) | |
dafb2da4 | 913 | |
925aa45b MW |
914 | class Ed25519Priv (_EdDSAPriv, Ed25519Pub): |
915 | _KEYSZ = KeySZAny(ED25519_KEYSZ) | |
916 | def _pubkey(me, priv): return ed25519_pubkey(priv) | |
5c4c0231 MW |
917 | def sign(me, msg, **kw): |
918 | return ed25519_sign(me.priv, msg, pub = me.pub, **kw) | |
dafb2da4 | 919 | |
eee202c3 MW |
920 | class Ed448Pub (_EdDSAPub): |
921 | _PUBSZ = KeySZSet(ED448_PUBSZ) | |
922 | _HASH = shake256 | |
923 | def verify(me, msg, sig, **kw): | |
924 | return ed448_verify(me.pub, msg, sig, **kw) | |
925 | ||
926 | class Ed448Priv (_EdDSAPriv, Ed448Pub): | |
927 | _KEYSZ = KeySZAny(ED448_KEYSZ) | |
928 | def _pubkey(me, priv): return ed448_pubkey(priv) | |
929 | def sign(me, msg, **kw): | |
930 | return ed448_sign(me.priv, msg, pub = me.pub, **kw) | |
931 | ||
848ba392 | 932 | ###-------------------------------------------------------------------------- |
00401529 | 933 | ### Built-in named curves and prime groups. |
ed8cc62d MW |
934 | |
935 | class _groupmap (object): | |
936 | def __init__(me, map, nth): | |
937 | me.map = map | |
938 | me.nth = nth | |
1b61856d MW |
939 | me._n = max(map.values()) + 1 |
940 | me.i = me._n*[None] | |
ed8cc62d | 941 | def __repr__(me): |
96d7ed6c MW |
942 | return '{%s}' % ', '.join(['%r: %r' % kv for kv in me.iteritems()]) |
943 | def _repr_pretty_(me, pp, cyclep): | |
582568f1 MW |
944 | ind = _pp_bgroup(pp, '{ ') |
945 | if cyclep: pp.text('...') | |
946 | else: _pp_dict(pp, me.iteritems()) | |
947 | pp.end_group(ind, ' }') | |
1b61856d MW |
948 | def __len__(me): |
949 | return me._n | |
ed8cc62d MW |
950 | def __contains__(me, k): |
951 | return k in me.map | |
952 | def __getitem__(me, k): | |
953 | i = me.map[k] | |
954 | if me.i[i] is None: | |
955 | me.i[i] = me.nth(i) | |
956 | return me.i[i] | |
957 | def __setitem__(me, k, v): | |
958 | raise TypeError, "immutable object" | |
959 | def __iter__(me): | |
960 | return iter(me.map) | |
96851f5d MW |
961 | def iterkeys(me): |
962 | return iter(me.map) | |
963 | def itervalues(me): | |
964 | for k in me: | |
965 | yield me[k] | |
966 | def iteritems(me): | |
967 | for k in me: | |
968 | yield k, me[k] | |
ed8cc62d MW |
969 | def keys(me): |
970 | return [k for k in me] | |
971 | def values(me): | |
972 | return [me[k] for k in me] | |
96851f5d MW |
973 | def items(me): |
974 | return [(k, me[k]) for k in me] | |
ed8cc62d MW |
975 | eccurves = _groupmap(_base._eccurves, ECInfo._curven) |
976 | primegroups = _groupmap(_base._pgroups, DHInfo._groupn) | |
977 | bingroups = _groupmap(_base._bingroups, BinDHInfo._groupn) | |
978 | ||
00401529 MW |
979 | ###-------------------------------------------------------------------------- |
980 | ### Prime number generation. | |
ed8cc62d MW |
981 | |
982 | class PrimeGenEventHandler (object): | |
983 | def pg_begin(me, ev): | |
984 | return me.pg_try(ev) | |
985 | def pg_done(me, ev): | |
986 | return PGEN_DONE | |
987 | def pg_abort(me, ev): | |
988 | return PGEN_TRY | |
989 | def pg_fail(me, ev): | |
990 | return PGEN_TRY | |
991 | def pg_pass(me, ev): | |
992 | return PGEN_TRY | |
d7ab1bab | 993 | |
994 | class SophieGermainStepJump (object): | |
995 | def pg_begin(me, ev): | |
996 | me.lf = PrimeFilter(ev.x) | |
997 | me.hf = me.lf.muladd(2, 1) | |
998 | return me.cont(ev) | |
999 | def pg_try(me, ev): | |
1000 | me.step() | |
1001 | return me.cont(ev) | |
1002 | def cont(me, ev): | |
1003 | while me.lf.status == PGEN_FAIL or me.hf.status == PGEN_FAIL: | |
1004 | me.step() | |
1005 | if me.lf.status == PGEN_ABORT or me.hf.status == PGEN_ABORT: | |
1006 | return PGEN_ABORT | |
1007 | ev.x = me.lf.x | |
1008 | if me.lf.status == PGEN_DONE and me.hf.status == PGEN_DONE: | |
1009 | return PGEN_DONE | |
1010 | return PGEN_TRY | |
1011 | def pg_done(me, ev): | |
1012 | del me.lf | |
1013 | del me.hf | |
1014 | ||
1015 | class SophieGermainStepper (SophieGermainStepJump): | |
1016 | def __init__(me, step): | |
1017 | me.lstep = step; | |
1018 | me.hstep = 2 * step | |
1019 | def step(me): | |
1020 | me.lf.step(me.lstep) | |
1021 | me.hf.step(me.hstep) | |
1022 | ||
1023 | class SophieGermainJumper (SophieGermainStepJump): | |
1024 | def __init__(me, jump): | |
1025 | me.ljump = PrimeFilter(jump); | |
1026 | me.hjump = me.ljump.muladd(2, 0) | |
1027 | def step(me): | |
1028 | me.lf.jump(me.ljump) | |
1029 | me.hf.jump(me.hjump) | |
1030 | def pg_done(me, ev): | |
1031 | del me.ljump | |
1032 | del me.hjump | |
1033 | SophieGermainStepJump.pg_done(me, ev) | |
1034 | ||
1035 | class SophieGermainTester (object): | |
1036 | def __init__(me): | |
1037 | pass | |
1038 | def pg_begin(me, ev): | |
1039 | me.lr = RabinMiller(ev.x) | |
1040 | me.hr = RabinMiller(2 * ev.x + 1) | |
1041 | def pg_try(me, ev): | |
1042 | lst = me.lr.test(ev.rng.range(me.lr.x)) | |
1043 | if lst != PGEN_PASS and lst != PGEN_DONE: | |
1044 | return lst | |
1045 | rst = me.hr.test(ev.rng.range(me.hr.x)) | |
1046 | if rst != PGEN_PASS and rst != PGEN_DONE: | |
1047 | return rst | |
1048 | if lst == PGEN_DONE and rst == PGEN_DONE: | |
1049 | return PGEN_DONE | |
1050 | return PGEN_PASS | |
1051 | def pg_done(me, ev): | |
1052 | del me.lr | |
1053 | del me.hr | |
1054 | ||
d7ab1bab | 1055 | class PrimitiveStepper (PrimeGenEventHandler): |
1056 | def __init__(me): | |
1057 | pass | |
1058 | def pg_try(me, ev): | |
1059 | ev.x = me.i.next() | |
1060 | return PGEN_TRY | |
1061 | def pg_begin(me, ev): | |
1062 | me.i = iter(smallprimes) | |
1063 | return me.pg_try(ev) | |
1064 | ||
1065 | class PrimitiveTester (PrimeGenEventHandler): | |
1066 | def __init__(me, mod, hh = [], exp = None): | |
1067 | me.mod = MPMont(mod) | |
1068 | me.exp = exp | |
1069 | me.hh = hh | |
1070 | def pg_try(me, ev): | |
1071 | x = ev.x | |
1072 | if me.exp is not None: | |
1073 | x = me.mod.exp(x, me.exp) | |
1074 | if x == 1: return PGEN_FAIL | |
1075 | for h in me.hh: | |
1076 | if me.mod.exp(x, h) == 1: return PGEN_FAIL | |
1077 | ev.x = x | |
1078 | return PGEN_DONE | |
1079 | ||
1080 | class SimulStepper (PrimeGenEventHandler): | |
1081 | def __init__(me, mul = 2, add = 1, step = 2): | |
1082 | me.step = step | |
1083 | me.mul = mul | |
1084 | me.add = add | |
1085 | def _stepfn(me, step): | |
1086 | if step <= 0: | |
1087 | raise ValueError, 'step must be positive' | |
1088 | if step <= MPW_MAX: | |
1089 | return lambda f: f.step(step) | |
1090 | j = PrimeFilter(step) | |
1091 | return lambda f: f.jump(j) | |
1092 | def pg_begin(me, ev): | |
1093 | x = ev.x | |
1094 | me.lf = PrimeFilter(x) | |
1095 | me.hf = PrimeFilter(x * me.mul + me.add) | |
1096 | me.lstep = me._stepfn(me.step) | |
1097 | me.hstep = me._stepfn(me.step * me.mul) | |
1098 | SimulStepper._cont(me, ev) | |
1099 | def pg_try(me, ev): | |
1100 | me._step() | |
1101 | me._cont(ev) | |
1102 | def _step(me): | |
1103 | me.lstep(me.lf) | |
1104 | me.hstep(me.hf) | |
1105 | def _cont(me, ev): | |
1106 | while me.lf.status == PGEN_FAIL or me.hf.status == PGEN_FAIL: | |
1107 | me._step() | |
1108 | if me.lf.status == PGEN_ABORT or me.hf.status == PGEN_ABORT: | |
1109 | return PGEN_ABORT | |
1110 | ev.x = me.lf.x | |
1111 | if me.lf.status == PGEN_DONE and me.hf.status == PGEN_DONE: | |
1112 | return PGEN_DONE | |
1113 | return PGEN_TRY | |
1114 | def pg_done(me, ev): | |
1115 | del me.lf | |
1116 | del me.hf | |
1117 | del me.lstep | |
1118 | del me.hstep | |
1119 | ||
1120 | class SimulTester (PrimeGenEventHandler): | |
1121 | def __init__(me, mul = 2, add = 1): | |
1122 | me.mul = mul | |
1123 | me.add = add | |
1124 | def pg_begin(me, ev): | |
1125 | x = ev.x | |
1126 | me.lr = RabinMiller(x) | |
1127 | me.hr = RabinMiller(x * me.mul + me.add) | |
1128 | def pg_try(me, ev): | |
1129 | lst = me.lr.test(ev.rng.range(me.lr.x)) | |
1130 | if lst != PGEN_PASS and lst != PGEN_DONE: | |
1131 | return lst | |
1132 | rst = me.hr.test(ev.rng.range(me.hr.x)) | |
1133 | if rst != PGEN_PASS and rst != PGEN_DONE: | |
1134 | return rst | |
1135 | if lst == PGEN_DONE and rst == PGEN_DONE: | |
1136 | return PGEN_DONE | |
1137 | return PGEN_PASS | |
1138 | def pg_done(me, ev): | |
1139 | del me.lr | |
1140 | del me.hr | |
1141 | ||
1142 | def sgprime(start, step = 2, name = 'p', event = pgen_nullev, nsteps = 0): | |
1143 | start = MP(start) | |
1144 | return pgen(start, name, SimulStepper(step = step), SimulTester(), event, | |
00401529 | 1145 | nsteps, RabinMiller.iters(start.nbits)) |
d7ab1bab | 1146 | |
1147 | def findprimitive(mod, hh = [], exp = None, name = 'g', event = pgen_nullev): | |
1148 | return pgen(0, name, PrimitiveStepper(), PrimitiveTester(mod, hh, exp), | |
00401529 | 1149 | event, 0, 1) |
d7ab1bab | 1150 | |
1151 | def kcdsaprime(pbits, qbits, rng = rand, | |
00401529 | 1152 | event = pgen_nullev, name = 'p', nsteps = 0): |
d7ab1bab | 1153 | hbits = pbits - qbits |
1154 | h = pgen(rng.mp(hbits, 1), name + ' [h]', | |
00401529 MW |
1155 | PrimeGenStepper(2), PrimeGenTester(), |
1156 | event, nsteps, RabinMiller.iters(hbits)) | |
d7ab1bab | 1157 | q = pgen(rng.mp(qbits, 1), name, SimulStepper(2 * h, 1, 2), |
00401529 | 1158 | SimulTester(2 * h, 1), event, nsteps, RabinMiller.iters(qbits)) |
d7ab1bab | 1159 | p = 2 * q * h + 1 |
1160 | return p, q, h | |
1161 | ||
1162 | #----- That's all, folks ---------------------------------------------------- |