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1/*
2 This file is part of GNUnet.
3 (C) 2010 Christian Grothoff (and other contributing authors)
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
19*/
20
21/**
22 * @file include/block_fs.h
23 * @brief fs block formats (shared between fs and block)
24 * @author Christian Grothoff
25 */
26#ifndef BLOCK_FS_H
27#define BLOCK_FS_H
28
29#include "gnunet_util_lib.h"
30
31/**
32 * @brief keyword block (advertising data under a keyword)
33 */
34struct KBlock
35{
36
37 /**
38 * GNUNET_RSA_Signature using RSA-key generated from search keyword.
39 */
40 struct GNUNET_CRYPTO_RsaSignature signature;
41
42 /**
43 * What is being signed and why?
44 */
45 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
46
47 /**
48 * Key generated (!) from the H(keyword) as the seed!
49 */
50 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded keyspace;
51
52 /* 0-terminated URI here */
53
54 /* variable-size Meta-Data follows here */
55
56};
57
58
59/**
60 * @brief namespace content block (advertising data under an identifier in a namespace)
61 */
62struct SBlock
63{
64
65 /**
66 * GNUNET_RSA_Signature using RSA-key of the namespace
67 */
68 struct GNUNET_CRYPTO_RsaSignature signature;
69
70 /**
71 * What is being signed and why?
72 */
73 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
74
75 /**
76 * Hash of the hash of the human-readable identifier used for
77 * this entry (the hash of the human-readable identifier is
78 * used as the key for decryption; the xor of this identifier
79 * and the hash of the "keyspace" is the datastore-query hash).
80 */
81 GNUNET_HashCode identifier;
82
83 /**
84 * Public key of the namespace.
85 */
86 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded subspace;
87
88 /* 0-terminated update-identifier here */
89
90 /* 0-terminated URI here (except for NBlocks) */
91
92 /* variable-size Meta-Data follows here */
93
94};
95
96
97/**
98 * @brief namespace advertisement block (advertising root of a namespace)
99 */
100struct NBlock
101{
102
103 /**
104 * GNUNET_RSA_Signature using RSA-key generated from search keyword.
105 */
106 struct GNUNET_CRYPTO_RsaSignature ksk_signature;
107
108 /**
109 * What is being signed and why?
110 */
111 struct GNUNET_CRYPTO_RsaSignaturePurpose ksk_purpose;
112
113 /**
114 * Key generated (!) from the H(keyword) as the seed!
115 */
116 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded keyspace;
117
118 /**
119 * GNUNET_RSA_Signature using RSA-key of the namespace
120 */
121 struct GNUNET_CRYPTO_RsaSignature ns_signature;
122
123 /**
124 * What is being signed and why?
125 */
126 struct GNUNET_CRYPTO_RsaSignaturePurpose ns_purpose;
127
128 /**
129 * Public key of the namespace.
130 */
131 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded subspace;
132
133 /* from here on, data is encrypted with H(keyword) */
134
135 /* 0-terminated root identifier here */
136
137 /* variable-size Meta-Data follows here */
138
139};
140
141
142/**
143 * @brief index block (indexing a DBlock that
144 * can be obtained directly from reading
145 * the plaintext file)
146 */
147struct OnDemandBlock
148{
149 /**
150 * Hash code of the entire content of the
151 * file that was indexed (used to uniquely
152 * identify the plaintext file).
153 */
154 GNUNET_HashCode file_id;
155
156 /**
157 * At which offset should we be able to find
158 * this on-demand encoded block? (in NBO)
159 */
160 uint64_t offset GNUNET_PACKED;
161
162};
163
164
165#endif