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-rw-r--r--src/util/gnunet-base32.c152
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 @@
+/*
+ This file is part of GNUnet.
+ Copyright (C) 2021 GNUnet e.V.
+
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
+ */
+
+/**
+ * @file util/gnunet-base32.c
+ * @brief tool to encode/decode from/to the Crockford Base32 encoding GNUnet uses
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_util_lib.h"
+
+
+/**
+ * The main function of gnunet-base32
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc,
+ char *const *argv)
+{
+ int decode = 0;
+ const struct GNUNET_GETOPT_CommandLineOption options[] = {
+ GNUNET_GETOPT_option_flag ('d',
+ "decode",
+ gettext_noop ("run decoder modus, otherwise runs as encoder"),
+ &decode),
+ GNUNET_GETOPT_option_help ("Crockford base32 encoder/decoder"),
+ GNUNET_GETOPT_option_version (PACKAGE_VERSION),
+ GNUNET_GETOPT_OPTION_END
+ };
+ int ret;
+ char *in;
+ unsigned int in_size;
+ ssize_t iret;
+ char *out;
+ size_t out_size;
+
+ if (GNUNET_OK !=
+ GNUNET_STRINGS_get_utf8_args (argc, argv,
+ &argc, &argv))
+ return 2;
+ ret = GNUNET_GETOPT_run ("gnunet-base32",
+ options,
+ argc,
+ argv);
+ if (ret < 0)
+ return 1;
+ if (0 == ret)
+ return 0;
+ in_size = 0;
+ in = NULL;
+ iret = 1;
+ while (iret > 0)
+ {
+ /* read in blocks of 4k */
+ char buf[4092];
+
+ iret = read (0,
+ buf,
+ sizeof (buf));
+ if (iret < 0)
+ {
+ GNUNET_free (in);
+ return 2;
+ }
+ if (iret > 0)
+ {
+ if (iret + in_size < in_size)
+ {
+ GNUNET_break (0);
+ GNUNET_free (in);
+ return 1;
+ }
+ GNUNET_array_grow (in,
+ in_size,
+ in_size + iret);
+ memcpy (&in[in_size - iret],
+ buf,
+ iret);
+ }
+ }
+ if (decode)
+ {
+ /* This formula can overestimate by 1 byte, so we try both
+ out_size and out_size-1 below */
+ out_size = in_size * 5 / 8;
+ out = GNUNET_malloc (out_size);
+ if (GNUNET_OK !=
+ GNUNET_STRINGS_string_to_data (in,
+ in_size,
+ out,
+ out_size))
+ {
+ out_size--;
+ if (GNUNET_OK !=
+ GNUNET_STRINGS_string_to_data (in,
+ in_size,
+ out,
+ out_size))
+ {
+ GNUNET_free (out);
+ GNUNET_free (in);
+ return 3;
+ }
+ }
+ }
+ else
+ {
+ out = GNUNET_STRINGS_data_to_string_alloc (in,
+ in_size);
+ out_size = strlen (out);
+ }
+ {
+ size_t pos = 0;
+
+ while (pos < out_size)
+ {
+ iret = write (1,
+ &out[pos],
+ out_size - pos);
+ if (iret <= 0)
+ return 4;
+ pos += iret;
+ }
+ }
+ GNUNET_free (out);
+ GNUNET_free_nz ((void *) argv);
+ return 0;
+}
+
+
+/* end of gnunet-uri.c */