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108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
/* base16enc -- an encoder for base16
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Copyright (C) 2006, 2012 Jeronimo Pellegrini, Niels Möller
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This file is part of GNU Nettle.
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GNU Nettle is free software: you can redistribute it and/or
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modify it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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or both in parallel, as here.
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GNU Nettle is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see http://www.gnu.org/licenses/.
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*/
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#if HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef WIN32
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#include <fcntl.h>
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#endif
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#include "base16.h"
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#include "io.h"
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/* The number of bytes read in each iteration, we do one line at a time: */
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#define CHUNK_SIZE 36
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/* The *maximum* size of an encoded chunk: */
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#define ENCODED_SIZE BASE16_ENCODE_LENGTH(CHUNK_SIZE)
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/*
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* Reads bytes from standard input and writes base64-encoded
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* on standard output.
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*/
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int
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main(int argc UNUSED, char **argv UNUSED)
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{
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#ifdef WIN32
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_setmode(0, O_BINARY);
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#endif
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/* There is no context to initialize. */
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for (;;)
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{
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/* "buffer" will hold the bytes from disk: */
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uint8_t buffer[CHUNK_SIZE];
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/* "result" will hold bytes before output: */
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char result[ENCODED_SIZE + 1];
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unsigned nbytes; /* Number of bytes read from stdin */
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int encoded_bytes; /* Total number of bytes encoded per iteration */
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nbytes = fread(buffer,1,CHUNK_SIZE,stdin);
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/* We overwrite result with more data */
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base16_encode_update(result, nbytes, buffer);
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encoded_bytes = BASE16_ENCODE_LENGTH(nbytes);
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result[encoded_bytes++] = '\n';
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if (nbytes < CHUNK_SIZE)
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{
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if (ferror(stdin))
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{
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werror ("Error reading file: %s\n", strerror(errno));
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return EXIT_FAILURE;
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}
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if (!write_data (stdout, encoded_bytes, result)
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|| fflush (stdout) != 0)
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{
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werror ("Error writing file: %s\n", strerror(errno));
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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/* The result vector is printed */
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if (!write_data(stdout, encoded_bytes, result))
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{
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werror ("Error writing file: %s\n", strerror(errno));
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return EXIT_FAILURE;
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}
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}
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}
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