51a0f805 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: sslprf.h,v 1.1 2001/04/06 22:05:10 mdw Exp $ |
4 | * |
5 | * The SSL pseudo-random function |
6 | * |
7 | * (c) 2001 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: sslprf.h,v $ |
33 | * Revision 1.1 2001/04/06 22:05:10 mdw |
34 | * Add support for SSL pseudo-random function. |
35 | * |
36 | */ |
37 | |
38 | #ifndef CATACOMB_SSLPRF_H |
39 | #define CATACOMB_SSLPRF_H |
40 | |
41 | #ifdef __cplusplus |
42 | extern "C" { |
43 | #endif |
44 | |
45 | /*----- Header files ------------------------------------------------------*/ |
46 | |
47 | #ifndef CATACOMB_GMAC_H |
48 | # include "gmac.h" |
49 | #endif |
50 | |
51 | #ifndef CATACOMB_GRAND_H |
52 | # include "grand.h" |
53 | #endif |
54 | |
55 | /*----- Data structures ---------------------------------------------------*/ |
56 | |
57 | typedef struct sslprf_ctx { |
58 | const gchash *co, *ci; /* Outer and inner hash functions */ |
59 | size_t ohashsz, ihashsz; /* Size of the hash outputs */ |
60 | ghash *h; /* Hash context from last time */ |
61 | const octet *k; /* Pointer to the secret */ |
62 | size_t ksz; /* Size of the secret buffer */ |
63 | const octet *sd; /* Pointer to the seed */ |
64 | size_t sdsz; /* Size of the seed buffer */ |
65 | unsigned i; /* Which iteration this is */ |
66 | octet *p; /* Pointer to output buffer */ |
67 | size_t sz; /* How many bytes are left */ |
68 | } sslprf_ctx; |
69 | |
70 | /*----- Functions provided ------------------------------------------------*/ |
71 | |
72 | /* --- @sslprf_init@ --- * |
73 | * |
74 | * Arguments: @sslprf_ctx *c@ = pointer to a context structure |
75 | * @const gchash *hco, *hci@ = outer and inner hash functions |
76 | * @const void *k@ = pointer to secret buffer |
77 | * @size_t ksz@ = size of the secret |
78 | * @const void *sd@ = pointer to seed buffer |
79 | * @size_t sdsz@ = size of the seed |
80 | * |
81 | * Returns: --- |
82 | * |
83 | * Use: Initializes an SSL generator context. |
84 | */ |
85 | |
86 | extern void sslprf_init(sslprf_ctx */*c*/, |
87 | const gchash */*hco*/, const gchash */*hci*/, |
88 | const void */*k*/, size_t /*ksz*/, |
89 | const void */*sd*/, size_t /*sdsz*/); |
90 | |
91 | /* --- @sslprf_encrypt@ --- * |
92 | * |
93 | * Arguments: @sslprf_ctx *c@ = pointer to a context structure |
94 | * @const void *src@ = pointer to source buffer |
95 | * @void *dest@ = pointer to destination buffer |
96 | * @size_t sz@ = size of the buffers |
97 | * |
98 | * Returns: --- |
99 | * |
100 | * Use: Encrypts data using the SSL pseudo-random function. If the |
101 | * destination pointer is null, the generator is spun and no |
102 | * output is produced; if the source pointer is null, raw output |
103 | * from the generator is written; otherwise, the source data is |
104 | * XORed with the generator output. |
105 | */ |
106 | |
107 | extern void sslprf_encrypt(sslprf_ctx */*c*/, |
108 | const void */*src*/, void */*dest*/, |
109 | size_t /*sz*/); |
110 | |
111 | /* --- @sslprf_free@ --- * |
112 | * |
113 | * Arguments: @sslprf_ctx@ = pointer to a context |
114 | * |
115 | * Returns: --- |
116 | * |
117 | * Use: Frees resources held in an SSL generator context. |
118 | */ |
119 | |
120 | extern void sslprf_free(sslprf_ctx */*c*/); |
121 | |
122 | /* ---@sslprf_rand@ --- * |
123 | * |
124 | * Arguments: @const gchash *hco, const gchash *hci@ = hash functions |
125 | * @const void *k@ = pointer to the key material |
126 | * @size_t ksz@ = size of the key material |
127 | * @const void *sd@ = pointer to the seed material |
128 | * @size_t sdsz@ = size of the seed material |
129 | * |
130 | * Returns: Pointer to generic random number generator interface. |
131 | * |
132 | * Use: Creates a generic generator which does TLS data expansion. |
133 | */ |
134 | |
135 | extern grand *sslprf_rand(const gchash */*hco*/, const gchash */*hci*/, |
136 | const void */*k*/, size_t /*ksz*/, |
137 | const void */*sd*/, size_t /*sdsz*/); |
138 | |
139 | /*----- That's all, folks -------------------------------------------------*/ |
140 | |
141 | #ifdef __cplusplus |
142 | } |
143 | #endif |
144 | |
145 | #endif |