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Diffstat (limited to 'src/mm-utils.c')
-rw-r--r-- | src/mm-utils.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/mm-utils.c b/src/mm-utils.c new file mode 100644 index 0000000..56182c0 --- /dev/null +++ b/src/mm-utils.c @@ -0,0 +1,78 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details: + * + * Copyright (C) 2010 Red Hat, Inc. + */ + +#include <config.h> +#include <glib.h> +#include <string.h> +#include <ctype.h> +#include <stdlib.h> +#include <errno.h> + +#include "mm-utils.h" + +/* From hostap, Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi> */ + +static int hex2num (char c) +{ + if (c >= '0' && c <= '9') + return c - '0'; + if (c >= 'a' && c <= 'f') + return c - 'a' + 10; + if (c >= 'A' && c <= 'F') + return c - 'A' + 10; + return -1; +} + +int utils_hex2byte (const char *hex) +{ + int a, b; + a = hex2num(*hex++); + if (a < 0) + return -1; + b = hex2num(*hex++); + if (b < 0) + return -1; + return (a << 4) | b; +} + +char * +utils_hexstr2bin (const char *hex, gsize *out_len) +{ + size_t len = strlen (hex); + size_t i; + int a; + const char * ipos = hex; + char * buf = NULL; + char * opos; + + /* Length must be a multiple of 2 */ + g_return_val_if_fail ((len % 2) == 0, NULL); + + opos = buf = g_malloc0 ((len / 2) + 1); + for (i = 0; i < len; i += 2) { + a = utils_hex2byte (ipos); + if (a < 0) { + g_free (buf); + return NULL; + } + *opos++ = a; + ipos += 2; + } + *out_len = len / 2; + return buf; +} + +/* End from hostap */ + |