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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: blkc.h,v 1.2 1999/12/10 23:29:48 mdw Exp $ |
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4 | * |
5 | * Common definitions for block ciphers |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: blkc.h,v $ |
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33 | * Revision 1.2 1999/12/10 23:29:48 mdw |
34 | * Change header file guard names. |
35 | * |
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36 | * Revision 1.1 1999/09/03 08:41:11 mdw |
37 | * Initial import. |
38 | * |
39 | */ |
40 | |
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41 | #ifndef CATACOMB_BLKC_H |
42 | #define CATACOMB_BLKC_H |
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43 | |
44 | #ifdef __cplusplus |
45 | extern "C" { |
46 | #endif |
47 | |
48 | /*----- Header files ------------------------------------------------------*/ |
49 | |
50 | #include <mLib/bits.h> |
51 | |
52 | /*----- Theory of operation -----------------------------------------------* |
53 | * |
54 | * A block cipher has associated with it a triple, called PRE_CLASS, of the |
55 | * form `(TYPE, ENDIAN, BITS)', where TYPE is either `N' (representing an |
56 | * implemented bit size) or `X' (representing an unimplemented bit size, |
57 | * causing loops to be compiled rather than unrolled code), ENDIAN is `B' |
58 | * (big) or `L' (little), and BITS is the block size of the cipher in bits. |
59 | */ |
60 | |
61 | /*----- Data movement macros ----------------------------------------------*/ |
62 | |
63 | /* |
64 | * `The C preprocessor. You will never find a more wretched hive of bogus |
65 | * hackery. We must be cautious.' |
66 | */ |
67 | |
68 | /* --- General dispatch macros --- */ |
69 | |
70 | #define BLKC_DOGLUE(x, y) x ## y |
71 | #define BLKC_GLUE(x, y) BLKC_DOGLUE(x, y) |
72 | #define BLKC_APPLY(f, x) f x |
73 | #define BLKC_FIRST(x, y, z) x |
74 | #define BLKC_SECOND(x, y, z) y |
75 | #define BLKC_THIRD(x, y, z) z |
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76 | #define BLKC_TYPE(PRE) BLKC_APPLY(BLKC_FIRST, PRE##_CLASS) |
77 | #define BLKC_ENDIAN(PRE) BLKC_APPLY(BLKC_SECOND, PRE##_CLASS) |
78 | #define BLKC_BITS(PRE) BLKC_APPLY(BLKC_THIRD, PRE##_CLASS) |
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79 | |
80 | #define BLKC_STORE_E(PRE) BLKC_GLUE(STORE32_, BLKC_ENDIAN(PRE)) |
81 | #define BLKC_LOAD_E(PRE) BLKC_GLUE(LOAD32_, BLKC_ENDIAN(PRE)) |
82 | |
83 | /* --- Interface macros --- */ |
84 | |
85 | #define BLKC_STORE(PRE, b, w) \ |
86 | BLKC_GLUE(BLKC_STORE_, BLKC_TYPE(PRE)) \ |
87 | (PRE, b, w, BLKC_STORE_E(PRE), BLKC_BITS(PRE)) |
88 | |
89 | #define BLKC_XSTORE(PRE, b, w, wx) \ |
90 | BLKC_GLUE(BLKC_XSTORE_, BLKC_TYPE(PRE)) \ |
91 | (PRE, b, w, wx, BLKC_STORE_E(PRE), BLKC_BITS(PRE)) |
92 | |
93 | #define BLKC_LOAD(PRE, w, b) \ |
94 | BLKC_GLUE(BLKC_LOAD_, BLKC_TYPE(PRE)) \ |
95 | (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE)) |
96 | |
97 | #define BLKC_XLOAD(PRE, w, b) \ |
98 | BLKC_GLUE(BLKC_XLOAD_, BLKC_TYPE(PRE)) \ |
99 | (PRE, w, b, BLKC_LOAD_E(PRE), BLKC_BITS(PRE)) |
100 | |
101 | #define BLKC_MOVE(PRE, w, wx) \ |
102 | BLKC_GLUE(BLKC_MOVE_, BLKC_TYPE(PRE)) \ |
103 | (PRE, w, wx, BLKC_BITS(PRE)) |
104 | |
105 | #define BLKC_XMOVE(PRE, w, wx) \ |
106 | BLKC_GLUE(BLKC_XMOVE_, BLKC_TYPE(PRE)) \ |
107 | (PRE, w, wx, BLKC_BITS(PRE)) |
108 | |
109 | /* --- General implementation skeleton --- */ |
110 | |
111 | #define BLKC_SKEL(PRE, decl, guts) do { \ |
112 | decl \ |
113 | guts \ |
114 | } while (0) |
115 | |
116 | #define BLKC_P(p) register octet *_p = (octet *)(p) |
117 | #define BLKC_W(w) register uint32 *_w = (w) |
118 | #define BLKC_WX(wx) register uint32 *_wx = (wx); |
119 | |
120 | /* --- Implementation for unusual block sizes --- */ |
121 | |
122 | #define BLKC_SKEL_X(PRE, decl, guts) \ |
123 | BLKC_SKEL(PRE, int _i; decl, \ |
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124 | for (_i = 0; _i < PRE##_BLKSZ / 4; _i++) { \ |
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125 | guts \ |
126 | }) |
127 | |
128 | #define BLKC_STORE_X(PRE, b, w, op, n) \ |
129 | BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w);, \ |
130 | op(_p, *_w); _p += 4; _w++; ) |
131 | |
132 | #define BLKC_XSTORE_X(PRE, b, w, wx, op, n) \ |
133 | BLKC_SKEL_X(PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \ |
134 | op(_p, *_w ^ *_wx); _p += 4; _w++; _wx++; ) |
135 | |
136 | #define BLKC_LOAD_X(PRE, w, b, op, n) \ |
137 | BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \ |
138 | *_w = op(_p); _p += 4; _w++; ) |
139 | |
140 | #define BLKC_XLOAD_X(PRE, w, b, op, n) \ |
141 | BLKC_SKEL_X(PRE, const BLKC_P(b); BLKC_W(w);, \ |
142 | *_w ^= op(_p); _p += 4; _w++; ) |
143 | |
144 | #define BLKC_MOVE_X(PRE, w, wx, n) \ |
145 | BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \ |
146 | *_w = *_wx; _w++; _wx++; ) \ |
147 | |
148 | #define BLKC_XMOVE_X(PRE, w, wx, n) \ |
149 | BLKC_SKEL_X(PRE, BLKC_W(w); const BLKC_WX(wx);, \ |
150 | *_w ^= *_wx; _w++; _wx++; ) \ |
151 | |
152 | /* --- Implementation for known block sizes --- */ |
153 | |
154 | #define BLKC_SKEL_64(PRE, decl, op, guts) \ |
155 | BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1);) |
156 | |
157 | #define BLKC_SKEL_128(PRE, decl, op, guts) \ |
158 | BLKC_SKEL(PRE, decl, guts(op, 0); guts(op, 1); guts(op, 2); guts(op, 3);) |
159 | |
160 | #define BLKC_STORE_GUTS(op, i) op(_p + 4 * i, _w[i]) |
161 | #define BLKC_XSTORE_GUTS(op, i) op(_p + 4 * i, _w[i] ^ _wx[i]) |
162 | #define BLKC_LOAD_GUTS(op, i) _w[i] = op(_p + 4 * i) |
163 | #define BLKC_XLOAD_GUTS(op, i) _w[i] ^= op(_p + 4 * i) |
164 | #define BLKC_MOVE_GUTS(op, i) _w[i] = _wx[i] |
165 | #define BLKC_XMOVE_GUTS(op, i) _w[i] ^= _wx[i] |
166 | |
167 | #define BLKC_STORE_N(PRE, b, w, op, n) \ |
168 | BLKC_GLUE(BLKC_SKEL_, n) \ |
169 | (PRE, BLKC_P(b); const BLKC_W(w);, op, BLKC_STORE_GUTS) |
170 | |
171 | #define BLKC_XSTORE_N(PRE, b, w, wx, op, n) \ |
172 | BLKC_GLUE(BLKC_SKEL_, n) \ |
173 | (PRE, BLKC_P(b); const BLKC_W(w); const BLKC_WX(wx);, \ |
174 | op, BLKC_XSTORE_GUTS) |
175 | |
176 | #define BLKC_LOAD_N(PRE, w, b, op, n) \ |
177 | BLKC_GLUE(BLKC_SKEL_, n) \ |
178 | (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_LOAD_GUTS) |
179 | |
180 | #define BLKC_XLOAD_N(PRE, w, b, op, n) \ |
181 | BLKC_GLUE(BLKC_SKEL_, n) \ |
182 | (PRE, const BLKC_P(b); BLKC_W(w);, op, BLKC_XLOAD_GUTS) |
183 | |
184 | #define BLKC_MOVE_N(PRE, w, wx, n) \ |
185 | BLKC_GLUE(BLKC_SKEL_, n) \ |
186 | (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_MOVE_GUTS) |
187 | |
188 | #define BLKC_XMOVE_N(PRE, w, wx, n) \ |
189 | BLKC_GLUE(BLKC_SKEL_, n) \ |
190 | (PRE, BLKC_W(w); const BLKC_WX(wx);, op, BLKC_XMOVE_GUTS) |
191 | |
192 | /*----- Test rig for block ciphers ----------------------------------------*/ |
193 | |
194 | /* --- @BLKC_TEST@ --- * |
195 | * |
196 | * Arguments: @PRE@, @pre@ = prefixes for cipher-specific definitions |
197 | * |
198 | * Use: Standard test rig for block ciphers. |
199 | */ |
200 | |
201 | #ifdef TEST_RIG |
202 | |
203 | #include <mLib/quis.h> |
204 | #include <mLib/testrig.h> |
205 | |
206 | #define BLKC_TEST(PRE, pre) \ |
207 | \ |
208 | static int verify(dstr *v) \ |
209 | { \ |
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210 | pre##_ctx k; \ |
211 | uint32 p[PRE##_BLKSZ / 4]; \ |
212 | uint32 c[PRE##_BLKSZ / 4]; \ |
213 | uint32 d[PRE##_BLKSZ / 4]; \ |
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214 | dstr b = DSTR_INIT; \ |
215 | int ok = 1; \ |
216 | \ |
217 | /* --- Initialize the key buffer --- */ \ |
218 | \ |
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219 | dstr_ensure(&b, PRE##_BLKSZ); \ |
220 | b.len = PRE##_BLKSZ; \ |
221 | pre##_init(&k, v[0].buf, v[0].len); \ |
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222 | BLKC_LOAD(PRE, p, v[1].buf); \ |
223 | BLKC_LOAD(PRE, c, v[2].buf); \ |
224 | \ |
225 | /* --- Test encryption --- */ \ |
226 | \ |
227 | BLKC_MOVE(PRE, d, p); \ |
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228 | pre##_eblk(&k, d, d); \ |
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229 | BLKC_STORE(PRE, b.buf, d); \ |
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230 | if (memcmp(b.buf, v[2].buf, PRE##_BLKSZ)) { \ |
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231 | ok = 0; \ |
232 | printf("\nfail encryption:" \ |
233 | "\n\tkey = "); \ |
234 | type_hex.dump(&v[0], stdout); \ |
235 | printf("\n\tplaintext = "); type_hex.dump(&v[1], stdout); \ |
236 | printf("\n\texpected = "); type_hex.dump(&v[2], stdout); \ |
237 | printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \ |
238 | putchar('\n'); \ |
239 | } \ |
240 | \ |
241 | /* --- Test decryption --- */ \ |
242 | \ |
243 | BLKC_MOVE(PRE, d, c); \ |
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244 | pre##_dblk(&k, d, d); \ |
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245 | BLKC_STORE(PRE, b.buf, d); \ |
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246 | if (memcmp(b.buf, v[1].buf, PRE##_BLKSZ)) { \ |
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247 | ok = 0; \ |
248 | printf("\nfail decryption:" \ |
249 | "\n\tkey = "); \ |
250 | type_hex.dump(&v[0], stdout); \ |
251 | printf("\n\tciphertext = "); type_hex.dump(&v[2], stdout); \ |
252 | printf("\n\texpected = "); type_hex.dump(&v[1], stdout); \ |
253 | printf("\n\tcalculated = "); type_hex.dump(&b, stdout); \ |
254 | putchar('\n'); \ |
255 | } \ |
256 | \ |
257 | /* --- Return --- */ \ |
258 | \ |
259 | return (ok); \ |
260 | } \ |
261 | \ |
262 | static test_chunk defs[] = { \ |
263 | { #pre, verify, { &type_hex, &type_hex, &type_hex, 0 } }, \ |
264 | { #pre "-sched", verify, { &type_hex, &type_hex, &type_hex, 0 } }, \ |
265 | { 0, 0, { 0 } } \ |
266 | }; \ |
267 | \ |
268 | int main(int argc, char *argv[]) \ |
269 | { \ |
270 | test_run(argc, argv, defs, SRCDIR"/tests/" #pre); \ |
271 | return (0); \ |
272 | } |
273 | |
274 | #else |
275 | # define BLKC_TEST(PRE, pre) |
276 | #endif |
277 | |
278 | /*----- That's all, folks -------------------------------------------------*/ |
279 | |
280 | #ifdef __cplusplus |
281 | } |
282 | #endif |
283 | |
284 | #endif |