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Diffstat (limited to 'src/util/gnunet-base32.c')
-rw-r--r-- | src/util/gnunet-base32.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/util/gnunet-base32.c b/src/util/gnunet-base32.c new file mode 100644 index 000000000..2c797f56e --- /dev/null +++ b/src/util/gnunet-base32.c | |||
@@ -0,0 +1,152 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2021 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your 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 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file util/gnunet-base32.c | ||
23 | * @brief tool to encode/decode from/to the Crockford Base32 encoding GNUnet uses | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_util_lib.h" | ||
28 | |||
29 | |||
30 | /** | ||
31 | * The main function of gnunet-base32 | ||
32 | * | ||
33 | * @param argc number of arguments from the command line | ||
34 | * @param argv command line arguments | ||
35 | * @return 0 ok, 1 on error | ||
36 | */ | ||
37 | int | ||
38 | main (int argc, | ||
39 | char *const *argv) | ||
40 | { | ||
41 | int decode = 0; | ||
42 | const struct GNUNET_GETOPT_CommandLineOption options[] = { | ||
43 | GNUNET_GETOPT_option_flag ('d', | ||
44 | "decode", | ||
45 | gettext_noop ("run decoder modus, otherwise runs as encoder"), | ||
46 | &decode), | ||
47 | GNUNET_GETOPT_option_help ("Crockford base32 encoder/decoder"), | ||
48 | GNUNET_GETOPT_option_version (PACKAGE_VERSION), | ||
49 | GNUNET_GETOPT_OPTION_END | ||
50 | }; | ||
51 | int ret; | ||
52 | char *in; | ||
53 | unsigned int in_size; | ||
54 | ssize_t iret; | ||
55 | char *out; | ||
56 | size_t out_size; | ||
57 | |||
58 | if (GNUNET_OK != | ||
59 | GNUNET_STRINGS_get_utf8_args (argc, argv, | ||
60 | &argc, &argv)) | ||
61 | return 2; | ||
62 | ret = GNUNET_GETOPT_run ("gnunet-base32", | ||
63 | options, | ||
64 | argc, | ||
65 | argv); | ||
66 | if (ret < 0) | ||
67 | return 1; | ||
68 | if (0 == ret) | ||
69 | return 0; | ||
70 | in_size = 0; | ||
71 | in = NULL; | ||
72 | iret = 1; | ||
73 | while (iret > 0) | ||
74 | { | ||
75 | /* read in blocks of 4k */ | ||
76 | char buf[4092]; | ||
77 | |||
78 | iret = read (0, | ||
79 | buf, | ||
80 | sizeof (buf)); | ||
81 | if (iret < 0) | ||
82 | { | ||
83 | GNUNET_free (in); | ||
84 | return 2; | ||
85 | } | ||
86 | if (iret > 0) | ||
87 | { | ||
88 | if (iret + in_size < in_size) | ||
89 | { | ||
90 | GNUNET_break (0); | ||
91 | GNUNET_free (in); | ||
92 | return 1; | ||
93 | } | ||
94 | GNUNET_array_grow (in, | ||
95 | in_size, | ||
96 | in_size + iret); | ||
97 | memcpy (&in[in_size - iret], | ||
98 | buf, | ||
99 | iret); | ||
100 | } | ||
101 | } | ||
102 | if (decode) | ||
103 | { | ||
104 | /* This formula can overestimate by 1 byte, so we try both | ||
105 | out_size and out_size-1 below */ | ||
106 | out_size = in_size * 5 / 8; | ||
107 | out = GNUNET_malloc (out_size); | ||
108 | if (GNUNET_OK != | ||
109 | GNUNET_STRINGS_string_to_data (in, | ||
110 | in_size, | ||
111 | out, | ||
112 | out_size)) | ||
113 | { | ||
114 | out_size--; | ||
115 | if (GNUNET_OK != | ||
116 | GNUNET_STRINGS_string_to_data (in, | ||
117 | in_size, | ||
118 | out, | ||
119 | out_size)) | ||
120 | { | ||
121 | GNUNET_free (out); | ||
122 | GNUNET_free (in); | ||
123 | return 3; | ||
124 | } | ||
125 | } | ||
126 | } | ||
127 | else | ||
128 | { | ||
129 | out = GNUNET_STRINGS_data_to_string_alloc (in, | ||
130 | in_size); | ||
131 | out_size = strlen (out); | ||
132 | } | ||
133 | { | ||
134 | size_t pos = 0; | ||
135 | |||
136 | while (pos < out_size) | ||
137 | { | ||
138 | iret = write (1, | ||
139 | &out[pos], | ||
140 | out_size - pos); | ||
141 | if (iret <= 0) | ||
142 | return 4; | ||
143 | pos += iret; | ||
144 | } | ||
145 | } | ||
146 | GNUNET_free (out); | ||
147 | GNUNET_free_nz ((void *) argv); | ||
148 | return 0; | ||
149 | } | ||
150 | |||
151 | |||
152 | /* end of gnunet-uri.c */ | ||