0f5ec153 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: rabin.h,v 1.1 1999/11/19 13:17:57 mdw Exp $ |
4 | * |
5 | * Miller-Rabin primality test |
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: rabin.h,v $ |
33 | * Revision 1.1 1999/11/19 13:17:57 mdw |
34 | * Prime number generator and tester. |
35 | * |
36 | */ |
37 | |
38 | #ifndef RABIN_H |
39 | #define RABIN_H |
40 | |
41 | #ifdef __cplusplus |
42 | extern "C" { |
43 | #endif |
44 | |
45 | /*----- Header files ------------------------------------------------------*/ |
46 | |
47 | #ifndef MP_H |
48 | # include "mp.h" |
49 | #endif |
50 | |
51 | #ifndef MPMONT_H |
52 | # include "mpmont.h" |
53 | #endif |
54 | |
55 | #ifndef PGEN_H |
56 | # include "pgen.h" |
57 | #endif |
58 | |
59 | /*----- Data structures ---------------------------------------------------*/ |
60 | |
61 | typedef struct rabin { |
62 | mpmont mm; /* Montgomery arithmetic context */ |
63 | size_t s; /* %$m = 2^s r + 1$% */ |
64 | mp *r; /* %$m = 2^s r + 1$% */ |
65 | mp *m1; /* %$(m - 1)R \bmod m */ |
66 | } rabin; |
67 | |
68 | /*----- Functions provided ------------------------------------------------*/ |
69 | |
70 | /* --- @rabin_create@ --- * |
71 | * |
72 | * Arguments: @rabin *r@ = pointer to Rabin-Miller context |
73 | * @mp *m@ = pointer to number to test |
74 | * |
75 | * Returns: --- |
76 | * |
77 | * Use: Precomputes some useful values for performing the |
78 | * Miller-Rabin probabilistic primality test. |
79 | */ |
80 | |
81 | extern void rabin_create(rabin */*r*/, mp */*m*/); |
82 | |
83 | /* --- @rabin_destroy@ --- * |
84 | * |
85 | * Arguments: @rabin *r@ = pointer to Rabin-Miller context |
86 | * |
87 | * Returns: --- |
88 | * |
89 | * Use: Disposes of a Rabin-Miller context when it's no longer |
90 | * needed. |
91 | */ |
92 | |
93 | extern void rabin_destroy(rabin */*r*/); |
94 | |
95 | /* --- @rabin_test@ --- * |
96 | * |
97 | * Arguments: @rabin *r@ = pointer to Rabin-Miller context |
98 | * @mp *g@ = base to test the number against |
99 | * |
100 | * Returns: Either @PGEN_COMPOSITE@ if the test failed, or @PGEN_MAYBE@ |
101 | * if it succeeded. |
102 | * |
103 | * Use: Performs a single iteration of the Rabin-Miller primality |
104 | * test. |
105 | */ |
106 | |
107 | extern int rabin_test(rabin */*r*/, mp */*g*/); |
108 | |
109 | /*----- That's all, folks -------------------------------------------------*/ |
110 | |
111 | #ifdef __cplusplus |
112 | } |
113 | #endif |
114 | |
115 | #endif |