Commit | Line | Data |
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d03ab969 | 1 | /* -*-c-*- |
2 | * | |
d03ab969 | 3 | * Common definitions for block ciphers |
4 | * | |
5 | * (c) 1999 Straylight/Edgeware | |
6 | */ | |
7 | ||
45c0fd36 | 8 | /*----- Licensing notice --------------------------------------------------* |
d03ab969 | 9 | * |
10 | * This file is part of Catacomb. | |
11 | * | |
12 | * Catacomb is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU Library General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
45c0fd36 | 16 | * |
d03ab969 | 17 | * Catacomb 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 Library General Public License for more details. | |
45c0fd36 | 21 | * |
d03ab969 | 22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free | |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
25 | * MA 02111-1307, USA. | |
26 | */ | |
27 | ||
b3f05084 | 28 | #ifndef CATACOMB_BLKC_H |
29 | #define CATACOMB_BLKC_H | |
d03ab969 | 30 | |
31 | #ifdef __cplusplus | |
32 | extern "C" { | |
33 | #endif | |
34 | ||
35 | /*----- Header files ------------------------------------------------------*/ | |
36 | ||
c5885da8 | 37 | #include <assert.h> |
38 | ||
d03ab969 | 39 | #include <mLib/bits.h> |
40 | ||
41 | /*----- Theory of operation -----------------------------------------------* | |
42 | * | |
43 | * A block cipher has associated with it a triple, called PRE_CLASS, of the | |
44 | * form `(TYPE, ENDIAN, BITS)', where TYPE is either `N' (representing an | |
45 | * implemented bit size) or `X' (representing an unimplemented bit size, | |
46 | * causing loops to be compiled rather than unrolled code), ENDIAN is `B' | |
47 | * (big) or `L' (little), and BITS is the block size of the cipher in bits. | |
48 | */ | |
49 | ||
50 | /*----- Data movement macros ----------------------------------------------*/ | |
51 | ||
52 | /* | |
53 | * `The C preprocessor. You will never find a more wretched hive of bogus | |
54 | * hackery. We must be cautious.' | |
55 | */ | |
56 | ||
57 | /* --- General dispatch macros --- */ | |
58 | ||
59 | #define BLKC_DOGLUE(x, y) x ## y | |
60 | #define BLKC_GLUE(x, y) BLKC_DOGLUE(x, y) | |
61 | #define BLKC_APPLY(f, x) f x | |
62 | #define BLKC_FIRST(x, y, z) x | |
63 | #define BLKC_SECOND(x, y, z) y | |
64 | #define BLKC_THIRD(x, y, z) z | |
b3f05084 | 65 | #define BLKC_TYPE(PRE) BLKC_APPLY(BLKC_FIRST, PRE##_CLASS) |
66 | #define BLKC_ENDIAN(PRE) BLKC_APPLY(BLKC_SECOND, PRE##_CLASS) | |
67 | #define BLKC_BITS(PRE) BLKC_APPLY(BLKC_THIRD, PRE##_CLASS) | |
d03ab969 | 68 | |
69 | #define BLKC_STORE_E(PRE) BLKC_GLUE(STORE32_, BLKC_ENDIAN(PRE)) | |
70 | #define BLKC_LOAD_E(PRE) BLKC_GLUE(LOAD32_, BLKC_ENDIAN(PRE)) | |
71 | ||
72 | /* --- Interface macros --- */ | |
73 | ||
74 | #define BLKC_STORE(PRE, b, w) \ | |
75 | BLKC_GLUE(BLKC_STORE_, BLKC_TYPE(PRE)) \ | |
76 | (PRE, b, w, BLKC_STORE_E(PRE), BLKC_BITS(PRE)) | |
77 | ||
78 | #define BLKC_XSTORE(PRE, b, w, wx) \ | |
79 | BLKC_GLUE(BLKC_XSTORE_, BLKC_TYPE(PRE)) \ | |
80 | (PRE, b, w, wx, BLKC_STORE_E(PRE), BLKC_BITS(PRE)) | |
81 | ||
82 | #define BLKC_LOAD(PRE, w, b) \ | |
83 | BLKC_GLUE(BLKC_LOAD_, BLKC_TYPE(PRE)) \ | |
84 | (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE)) | |
85 | ||
86 | #define BLKC_XLOAD(PRE, w, b) \ | |
87 | BLKC_GLUE(BLKC_XLOAD_, BLKC_TYPE(PRE)) \ | |
88 | (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE)) | |
89 | ||
90 | #define BLKC_MOVE(PRE, w, wx) \ | |
91 | BLKC_GLUE(BLKC_MOVE_, BLKC_TYPE(PRE)) \ | |
92 | (PRE, w, wx, BLKC_BITS(PRE)) | |
93 | ||
94 | #define BLKC_XMOVE(PRE, w, wx) \ | |
95 | BLKC_GLUE(BLKC_XMOVE_, BLKC_TYPE(PRE)) \ | |
96 | (PRE, w, wx, BLKC_BITS(PRE)) | |
97 | ||
c5885da8 | 98 | #define BLKC_STEP(PRE, w) \ |
99 | BLKC_GLUE(BLKC_STEP_X_, BLKC_ENDIAN(PRE)) \ | |
100 | (PRE, w) | |
101 | ||
5c3f75ec | 102 | #define BLKC_ZERO(PRE, w) \ |
103 | BLKC_GLUE(BLKC_ZERO_, BLKC_TYPE(PRE)) \ | |
104 | (PRE, w, BLKC_BITS(PRE)) | |
105 | ||
c5885da8 | 106 | #define BLKC_SET(PRE, w, x) \ |
107 | BLKC_GLUE(BLKC_SET_X_, BLKC_ENDIAN(PRE)) \ | |
108 | (PRE, w, x) | |
109 | ||
110 | #define BLKC_SHOW(PRE, tag, w) do { \ | |
111 | fputs(tag ": ", stdout); \ | |
112 | BLKC_SKEL_X(PRE, BLKC_W(w);, printf("%08x ", *_w++);); \ | |
113 | fputc('\n', stdout); \ | |
114 | } while (0) | |
115 | ||
d03ab969 | 116 | /* --- General implementation skeleton --- */ |
117 | ||
118 | #define BLKC_SKEL(PRE, decl, guts) do { \ | |
119 | decl \ | |
120 | guts \ | |
121 | } while (0) | |
122 | ||
123 | #define BLKC_P(p) register octet *_p = (octet *)(p) | |
124 | #define BLKC_W(w) register uint32 *_w = (w) | |
c5885da8 | 125 | #define BLKC_WX(wx) register uint32 *_wx = (wx) |
d03ab969 | 126 | |
127 | /* --- Implementation for unusual block sizes --- */ | |
128 | ||
129 | #define BLKC_SKEL_X(PRE, decl, guts) \ | |
c5885da8 | 130 | BLKC_SKEL(PRE, unsigned _i; decl, \ |
b3f05084 | 131 | for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \ |
d03ab969 | 132 | guts \ |
133 | }) | |
134 | ||
135 | #define BLKC_STORE_X(PRE, b, w, op, n) \ | |
136 | BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w);, \ | |
137 | op(_p, *_w); _p += 4; _w++; ) | |
138 | ||
139 | #define BLKC_XSTORE_X(PRE, b, w, wx, op, n) \ | |
140 | BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \ | |
141 | op(_p, *_w ^ *_wx); _p += 4; _w++; _wx++; ) | |
142 | ||
143 | #define BLKC_LOAD_X(PRE, w, b, op, n) \ | |
144 | BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \ | |
145 | *_w = op(_p); _p += 4; _w++; ) | |
146 | ||
147 | #define BLKC_XLOAD_X(PRE, w, b, op, n) \ | |
148 | BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \ | |
149 | *_w ^= op(_p); _p += 4; _w++; ) | |
150 | ||
151 | #define BLKC_MOVE_X(PRE, w, wx, n) \ | |
152 | BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \ | |
153 | *_w = *_wx; _w++; _wx++; ) \ | |
154 | ||
155 | #define BLKC_XMOVE_X(PRE, w, wx, n) \ | |
156 | BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \ | |
157 | *_w ^= *_wx; _w++; _wx++; ) \ | |
158 | ||
5c3f75ec | 159 | #define BLKC_ZERO_X(PRE, w, n) \ |
160 | BLKC_SKEL_X(PRE, BLKC_W(w);, *_w++ = 0;) | |
161 | ||
c5885da8 | 162 | #define BLKC_STEP_X_B(PRE, w) do { \ |
163 | unsigned _i = PRE##_BLKSZ / 4; BLKC_W(w); uint32 _x = 0; \ | |
164 | while (_i && !_x) { _i--; _w[_i] = _x = U32(_w[_i] + 1); } \ | |
165 | } while (0) | |
166 | ||
167 | #define BLKC_STEP_X_L(PRE, w) do { \ | |
168 | unsigned _i = 0; BLKC_W(w); uint32 _x = 0; \ | |
169 | while (_i < PRE##_BLKSZ / 4 && !_x) \ | |
170 | { _w[_i] = _x = U32(_w[_i] + 1); _i++; } \ | |
171 | } while (0) | |
172 | ||
173 | #define BLKC_SET_X_B(PRE, w, x) do { \ | |
174 | unsigned _i; BLKC_W(w); unsigned long _x = x; \ | |
175 | for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \ | |
176 | *_w++ = U32(_x); \ | |
177 | _x = ((_x & ~MASK32) >> 16) >> 16; \ | |
178 | } \ | |
179 | } while (0) | |
180 | ||
181 | #define BLKC_SET_X_L(PRE, w, x) do { \ | |
182 | unsigned _i; BLKC_W(w); unsigned long _x = x; _w += PRE##_BLKSZ / 4; \ | |
183 | for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \ | |
184 | *--_w = U32(_x); \ | |
185 | _x = ((_x & ~MASK32) >> 16) >> 16; \ | |
186 | } \ | |
187 | } while (0) | |
188 | ||
d03ab969 | 189 | /* --- Implementation for known block sizes --- */ |
190 | ||
191 | #define BLKC_SKEL_64(PRE, decl, op, guts) \ | |
192 | BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1);) | |
193 | ||
c5885da8 | 194 | #define BLKC_SKEL_96(PRE, decl, op, guts) \ |
195 | BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2);) | |
196 | ||
d03ab969 | 197 | #define BLKC_SKEL_128(PRE, decl, op, guts) \ |
198 | BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3);) | |
199 | ||
70f31709 | 200 | #define BLKC_SKEL_192(PRE, decl, op, guts) \ |
201 | BLKC_SKEL(PRE, decl, \ | |
202 | guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3); \ | |
203 | guts(op, 4); guts(op, 5);) | |
204 | ||
205 | #define BLKC_SKEL_256(PRE, decl, op, guts) \ | |
206 | BLKC_SKEL(PRE, decl, \ | |
207 | guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3); \ | |
208 | guts(op, 4); guts(op, 5); guts(op, 6); guts(op, 7);) | |
209 | ||
d03ab969 | 210 | #define BLKC_STORE_GUTS(op, i) op(_p + 4 * i, _w[i]) |
211 | #define BLKC_XSTORE_GUTS(op, i) op(_p + 4 * i, _w[i] ^ _wx[i]) | |
212 | #define BLKC_LOAD_GUTS(op, i) _w[i] = op(_p + 4 * i) | |
213 | #define BLKC_XLOAD_GUTS(op, i) _w[i] ^= op(_p + 4 * i) | |
214 | #define BLKC_MOVE_GUTS(op, i) _w[i] = _wx[i] | |
215 | #define BLKC_XMOVE_GUTS(op, i) _w[i] ^= _wx[i] | |
5c3f75ec | 216 | #define BLKC_ZERO_GUTS(op, i) _w[i] = 0 |
d03ab969 | 217 | |
218 | #define BLKC_STORE_N(PRE, b, w, op, n) \ | |
219 | BLKC_GLUE(BLKC_SKEL_, n) \ | |
220 | (PRE, BLKC_P(b); const BLKC_W(w);, op, BLKC_STORE_GUTS) | |
221 | ||
222 | #define BLKC_XSTORE_N(PRE, b, w, wx, op, n) \ | |
223 | BLKC_GLUE(BLKC_SKEL_, n) \ | |
224 | (PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \ | |
225 | op, BLKC_XSTORE_GUTS) | |
226 | ||
227 | #define BLKC_LOAD_N(PRE, w, b, op, n) \ | |
228 | BLKC_GLUE(BLKC_SKEL_, n) \ | |
229 | (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_LOAD_GUTS) | |
230 | ||
231 | #define BLKC_XLOAD_N(PRE, w, b, op, n) \ | |
232 | BLKC_GLUE(BLKC_SKEL_, n) \ | |
233 | (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_XLOAD_GUTS) | |
234 | ||
235 | #define BLKC_MOVE_N(PRE, w, wx, n) \ | |
236 | BLKC_GLUE(BLKC_SKEL_, n) \ | |
237 | (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_MOVE_GUTS) | |
238 | ||
5c3f75ec | 239 | #define BLKC_ZERO_N(PRE, w, n) \ |
240 | BLKC_GLUE(BLKC_SKEL_, n) \ | |
241 | (PRE, BLKC_W(w); , op, BLKC_ZERO_GUTS) | |
242 | ||
d03ab969 | 243 | #define BLKC_XMOVE_N(PRE, w, wx, n) \ |
244 | BLKC_GLUE(BLKC_SKEL_, n) \ | |
245 | (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_XMOVE_GUTS) | |
246 | ||
247 | /*----- Test rig for block ciphers ----------------------------------------*/ | |
248 | ||
249 | /* --- @BLKC_TEST@ --- * | |
250 | * | |
251 | * Arguments: @PRE@, @pre@ = prefixes for cipher-specific definitions | |
252 | * | |
253 | * Use: Standard test rig for block ciphers. | |
254 | */ | |
255 | ||
256 | #ifdef TEST_RIG | |
257 | ||
f94b972d | 258 | #include <string.h> |
45c0fd36 | 259 | |
d03ab969 | 260 | #include <mLib/quis.h> |
261 | #include <mLib/testrig.h> | |
262 | ||
aaae9cab MW |
263 | #define BLKC_VERIFY(PRE, pre) BLKC_VERIFYX(PRE, pre, #pre) |
264 | ||
265 | #define BLKC_VERIFYX(PRE, pre, name) \ | |
d03ab969 | 266 | \ |
dcdc42e7 | 267 | static int pre##_verify(dstr *v) \ |
d03ab969 | 268 | { \ |
b3f05084 | 269 | pre##_ctx k; \ |
270 | uint32 p[PRE##_BLKSZ / 4]; \ | |
271 | uint32 c[PRE##_BLKSZ / 4]; \ | |
272 | uint32 d[PRE##_BLKSZ / 4]; \ | |
d03ab969 | 273 | dstr b = DSTR_INIT; \ |
274 | int ok = 1; \ | |
275 | \ | |
276 | /* --- Initialize the key buffer --- */ \ | |
277 | \ | |
b3f05084 | 278 | dstr_ensure(&b, PRE##_BLKSZ); \ |
279 | b.len = PRE##_BLKSZ; \ | |
280 | pre##_init(&k, v[0].buf, v[0].len); \ | |
d03ab969 | 281 | BLKC_LOAD(PRE, p, v[1].buf); \ |
282 | BLKC_LOAD(PRE, c, v[2].buf); \ | |
283 | \ | |
284 | /* --- Test encryption --- */ \ | |
285 | \ | |
286 | BLKC_MOVE(PRE, d, p); \ | |
b3f05084 | 287 | pre##_eblk(&k, d, d); \ |
d03ab969 | 288 | BLKC_STORE(PRE, b.buf, d); \ |
b3f05084 | 289 | if (memcmp(b.buf, v[2].buf, PRE##_BLKSZ)) { \ |
d03ab969 | 290 | ok = 0; \ |
291 | printf("\nfail encryption:" \ | |
45c0fd36 | 292 | "\n\tkey = "); \ |
d03ab969 | 293 | type_hex.dump(&v[0], stdout); \ |
294 | printf("\n\tplaintext = "); type_hex.dump(&v[1], stdout); \ | |
295 | printf("\n\texpected = "); type_hex.dump(&v[2], stdout); \ | |
296 | printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \ | |
297 | putchar('\n'); \ | |
298 | } \ | |
299 | \ | |
300 | /* --- Test decryption --- */ \ | |
301 | \ | |
302 | BLKC_MOVE(PRE, d, c); \ | |
b3f05084 | 303 | pre##_dblk(&k, d, d); \ |
d03ab969 | 304 | BLKC_STORE(PRE, b.buf, d); \ |
b3f05084 | 305 | if (memcmp(b.buf, v[1].buf, PRE##_BLKSZ)) { \ |
d03ab969 | 306 | ok = 0; \ |
307 | printf("\nfail decryption:" \ | |
45c0fd36 | 308 | "\n\tkey = "); \ |
d03ab969 | 309 | type_hex.dump(&v[0], stdout); \ |
310 | printf("\n\tciphertext = "); type_hex.dump(&v[2], stdout); \ | |
311 | printf("\n\texpected = "); type_hex.dump(&v[1], stdout); \ | |
312 | printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \ | |
313 | putchar('\n'); \ | |
314 | } \ | |
315 | \ | |
316 | /* --- Return --- */ \ | |
317 | \ | |
318 | return (ok); \ | |
dcdc42e7 | 319 | } |
320 | ||
4328f746 MW |
321 | #define BLKC_TESTDEFS(PRE, pre) BLKC_TESTDEFSX(PRE, pre, #pre) |
322 | ||
323 | #define BLKC_TESTDEFSX(PRE, pre, name) \ | |
324 | { name, pre##_verify, { &type_hex, &type_hex, &type_hex, 0 } }, | |
325 | ||
aaae9cab | 326 | #define BLKC_TESTX(PRE, pre, name, fname) \ |
dcdc42e7 | 327 | \ |
aaae9cab | 328 | BLKC_VERIFYX(PRE, pre, name) \ |
d03ab969 | 329 | \ |
4e66da02 | 330 | static const test_chunk defs[] = { \ |
4328f746 | 331 | BLKC_TESTDEFSX(PRE, pre, name) \ |
d03ab969 | 332 | { 0, 0, { 0 } } \ |
333 | }; \ | |
334 | \ | |
335 | int main(int argc, char *argv[]) \ | |
336 | { \ | |
aaae9cab | 337 | test_run(argc, argv, defs, SRCDIR"/t/" fname); \ |
d03ab969 | 338 | return (0); \ |
339 | } | |
340 | ||
341 | #else | |
aaae9cab | 342 | # define BLKC_TESTX(PRE, pre, name, fname) |
d03ab969 | 343 | #endif |
344 | ||
aaae9cab MW |
345 | #define BLKC_TEST(PRE, pre) BLKC_TESTX(PRE, pre, #pre, #pre) |
346 | ||
d03ab969 | 347 | /*----- That's all, folks -------------------------------------------------*/ |
348 | ||
349 | #ifdef __cplusplus | |
350 | } | |
351 | #endif | |
352 | ||
353 | #endif |