From 61e610065a304a7ddc1707ebdc46614e4ed7373b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Love=20H=C3=B6rnquist=20=C3=85strand?= Date: Fri, 4 Mar 2005 12:52:46 +0000 Subject: [PATCH] add hex encoder/decoder git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@14614 ec53bebd-3082-4978-b11e-865c3cabbd6b --- lib/roken/hex.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++ lib/roken/hex.h | 46 ++++++++++++++++++++++++ 2 files changed, 141 insertions(+) create mode 100644 lib/roken/hex.c create mode 100644 lib/roken/hex.h diff --git a/lib/roken/hex.c b/lib/roken/hex.c new file mode 100644 index 000000000..e2760af6b --- /dev/null +++ b/lib/roken/hex.c @@ -0,0 +1,95 @@ +/* + * Copyright (c) 2004-2005 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifdef HAVE_CONFIG_H +#include +RCSID("$Id$"); +#endif +#include +#include +#include +#include "hex.h" + +const static char hexchar[] = "0123456789ABCDEF"; + +static int +pos(char c) +{ + const char *p; + c = toupper((unsigned char)c); + for (p = hexchar; *p; p++) + if (*p == c) + return p - hexchar; + return -1; +} + +ssize_t +hex_encode(const void *data, int size, char **str) +{ + const unsigned char *q = data; + size_t i; + char *p; + + if (size + 1 > SIZE_T_MAX/2) + return -1; + + p = malloc(size * 2 + 1); + if (p == NULL) + return -1; + + for (i = 0; i < size; i++) { + p[i * 2] = hexchar[(*q >> 4) & 0xf]; + p[i * 2 + 1] = hexchar[*q & 0xf]; + q++; + } + p[i * 2] = '\0'; + *str = p; + + return i * 2; +} + +ssize_t +hex_decode(const char *str, void *data, size_t len) +{ + size_t l; + unsigned char *p = data; + size_t i; + + l = strlen(str); + if ((l + 1) / 2 > len) + return -1; + + for (i = 0; i < len; i++) + p[i] = pos(str[i * 2]) << 4 | pos(str[(i * 2) + 1]); + return i; +} diff --git a/lib/roken/hex.h b/lib/roken/hex.h new file mode 100644 index 000000000..66adc5cfd --- /dev/null +++ b/lib/roken/hex.h @@ -0,0 +1,46 @@ +/* + * Copyright (c) 2005 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* $Id$ */ + +#ifndef _BASE64_H_ +#define _BASE64_H_ + +#define hex_encode rk_hex_encode +#define hex_decode rk_hex_decode + +ssize_t hex_encode(const void *, int, char **); +ssize_t hex_decode(const char *, void *, size_t); + +#endif /* _BASE64_H_ */ +