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2026-08-07 17:38:18 +09:00
commit 873193a243
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+/*
+ *    Copyright (C) 1998,2002 Nikos Mavroyanopoulos
+ *    Copyright (C) 1999,2000 Sascha Schumman, Nikos Mavroyanopoulos
+ *
+ *    This library is free software; you can redistribute it and/or modify it 
+ *    under the terms of the GNU Library General Public License as published 
+ *    by the Free Software Foundation; either version 2 of the License, or 
+ *    (at your option) any later version.
+ *
+ *    This library 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
+ *    Library General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Library General Public
+ *    License along with this library; if not, write to the
+ *    Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ *    Boston, MA 02111-1307, USA.
+ */
+
+
+
+#include "libdefs.h"
+
+#ifdef WIN32
+/* Provided by Stefan Hetzl <shetzl@chello.at>
+ * in order for isxdigit to work on cygwin.
+ */
+static char hexdigits[] = { '0', '1', '2', '3', '4',
+			'5', '6', '7', '8', '9',
+			'a', 'b', 'c', 'd', 'e', 'f',
+			'A', 'B', 'C', 'D', 'E', 'F' } ;
+
+static mutils_boolean ishexdigit (mutils_word8 d)
+{
+	mutils_word8 i;
+
+	for (i = 0; i < 22 ; i++)
+		if (d == hexdigits[i]) 
+			return(MUTILS_TRUE);
+
+	return(MUTILS_FALSE);
+}
+#else
+# include <ctype.h>
+# define ishexdigit isxdigit
+#endif
+
+static mutils_boolean check_hex(mutils_word8 *given_chain, mutils_word32 len)
+{
+	mutils_word8 i;
+
+	for (i = 0; i < len; i++)
+		if (ishexdigit(given_chain[i]) == MUTILS_FALSE)
+			return(MUTILS_FALSE);
+
+	return(MUTILS_TRUE);
+}
+
+
+mutils_error _mhash_gen_key_hex(void *keyword, mutils_word32 key_size, 
+				mutils_word8 *password, mutils_word32 plen)
+{
+	mutils_word8 *chain = password;
+	mutils_word8 *pkeyword = keyword;
+	mutils_word8 tmp[3];
+	mutils_word32 i;
+
+	mutils_bzero(keyword, key_size);
+
+	/* The chain should have 2*n characters 
+	 */
+
+	if (plen % 2 != 0 || plen > key_size*2)
+		return(-MUTILS_INVALID_SIZE);
+
+	if (check_hex(chain, plen) == MUTILS_FALSE)
+		return(-MUTILS_INVALID_FORMAT);
+
+	mutils_bzero( keyword, key_size);
+
+	for (i = 0; i < plen; i += 2) {
+		mutils_memcpy(tmp, &chain[i], 2);
+		tmp[2] = '\0';
+		pkeyword[i / 2] = mutils_strtol(tmp, (mutils_word8 **) NULL, 16);
+	}
+
+	return(MUTILS_OK);
+}
+
+