01898d8e |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: rsa.h,v 1.1 1999/12/22 15:50:45 mdw Exp $ |
4 | * |
5 | * The RSA public-key cryptosystem |
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: rsa.h,v $ |
33 | * Revision 1.1 1999/12/22 15:50:45 mdw |
34 | * Initial RSA support. |
35 | * |
36 | */ |
37 | |
38 | #ifndef CATACOMB_RSA_H |
39 | #define CATACOMB_RSA_H |
40 | |
41 | #ifdef __cplusplus |
42 | extern "C" { |
43 | #endif |
44 | |
45 | /*----- Header files ------------------------------------------------------*/ |
46 | |
47 | #ifndef CATACOMB_GRAND_H |
48 | # include "grand.h" |
49 | #endif |
50 | |
51 | #ifndef CATACOMB_MP_H |
52 | # include "mp.h" |
53 | #endif |
54 | |
55 | #ifndef CATACOMB_PGEN_H |
56 | # include "pgen.h" |
57 | #endif |
58 | |
59 | /*----- Data structures ---------------------------------------------------*/ |
60 | |
61 | typedef struct rsa_param { |
62 | mp *p, *q; |
63 | mp *n; |
64 | mp *q_inv; |
65 | mp *e, *d, *dp, *dq; |
66 | } rsa_param; |
67 | |
68 | /*----- Functions provided ------------------------------------------------*/ |
69 | |
70 | /* --- @rsa_gen@ --- * |
71 | * |
72 | * Arguments: @rsa_param *rp@ = pointer to block to be filled in |
73 | * @unsigned nbits@ = required modulus size in bits |
74 | * @grand *r@ = random number source |
75 | * @unsigned n@ = number of attempts to make |
76 | * @pgen_proc *event@ = event handler function |
77 | * @void *ectx@ = argument for the event handler |
78 | * |
79 | * Returns: Zero if all went well, nonzero otherwise. |
80 | * |
81 | * Use: Constructs a pair of strong RSA primes and other useful RSA |
82 | * parameters. A small encryption exponent is chosen if |
83 | * possible. |
84 | */ |
85 | |
86 | extern int rsa_gen(rsa_param */*rp*/, unsigned /*nbits*/, |
87 | grand */*r*/, unsigned /*n*/, |
88 | pgen_proc */*event*/, void */*ectx*/); |
89 | |
90 | /* --- @rsa_decrypt@ --- * |
91 | * |
92 | * Arguments: @rsa_param *rp@ = pointer to RSA parameters |
93 | * @mp *d@ = destination |
94 | * @mp *c@ = ciphertext message |
95 | * @grand *r@ = pointer to random number source for blinding |
96 | * |
97 | * Returns: Correctly decrypted message. |
98 | * |
99 | * Use: Performs RSA decryption, very carefully. |
100 | */ |
101 | |
102 | extern mp *rsa_decrypt(rsa_param */*rp*/, mp */*d*/, mp */*c*/, |
103 | grand */*r*/); |
104 | |
105 | /* --- @rsa_recover@ --- * |
106 | * |
107 | * Arguments: @rsa_param *rp@ = pointer to parameter block |
108 | * |
109 | * Returns: Zero if all went well, nonzero if the parameters make no |
110 | * sense. |
111 | * |
112 | * Use: Derives the full set of RSA parameters given a minimal set. |
113 | */ |
114 | |
115 | extern int rsa_recover(rsa_param */*rp*/); |
116 | |
117 | /*----- That's all, folks -------------------------------------------------*/ |
118 | |
119 | #ifdef __cplusplus |
120 | } |
121 | #endif |
122 | |
123 | #endif |