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1 | /* -*-c-*- |
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2 | * |
3 | * Generate tables for SAFER |
4 | * |
5 | * (c) 2001 Straylight/Edgeware |
6 | */ |
7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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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. |
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16 | * |
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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. |
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21 | * |
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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 | |
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28 | /*----- Header files ------------------------------------------------------*/ |
29 | |
30 | #include <stdio.h> |
31 | #include <stdlib.h> |
32 | |
33 | #include <mLib/bits.h> |
34 | |
35 | /*----- Main code ---------------------------------------------------------*/ |
36 | |
37 | int main(void) |
38 | { |
39 | octet s[256], si[256]; |
40 | unsigned x, i; |
41 | |
42 | x = 1; |
43 | for (i = 0; i < 256; i++) { |
44 | if (x < 256) { |
45 | s[i] = x; |
46 | si[x] = i; |
47 | } |
48 | x = (x * 45)%257; |
49 | } |
50 | s[128] = 0; |
51 | si[0] = 128; |
52 | |
53 | fputs("\ |
54 | /* -*-c-*-\n\ |
55 | *\n\ |
56 | * SAFER tables [generated]\n\ |
57 | */\n\ |
58 | \n\ |
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59 | #include <mLib/bits.h>\n\ |
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60 | \n\ |
61 | ", stdout); |
62 | |
63 | fputs("\ |
64 | /* --- S-boxes --- */\n\ |
65 | \n\ |
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66 | const octet safer_s[256] = {\n\ |
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67 | ", stdout); |
68 | for (i = 0; i < 256; i++) { |
69 | printf("0x%02x", s[i]); |
70 | if (i == 255) |
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71 | fputs("\n};\n\n", stdout); |
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72 | else if ((i + 1)%8 == 0) |
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73 | fputs(",\n ", stdout); |
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74 | else |
75 | fputs(", ", stdout); |
76 | } |
77 | |
78 | fputs("\ |
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79 | const octet safer_si[256] = {\n\ |
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80 | ", stdout); |
81 | for (i = 0; i < 256; i++) { |
82 | printf("0x%02x", si[i]); |
83 | if (i == 255) |
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84 | fputs("\n};\n", stdout); |
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85 | else if ((i + 1)%8 == 0) |
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86 | fputs(",\n ", stdout); |
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87 | else |
88 | fputs(", ", stdout); |
89 | } |
90 | |
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91 | if (fclose(stdout)) { |
92 | fprintf(stderr, "error writing data\n"); |
93 | exit(EXIT_FAILURE); |
94 | } |
95 | |
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96 | return (0); |
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97 | } |
98 | |
99 | /*----- That's all, folks -------------------------------------------------*/ |