libwind from Assar. stringprep library supporting nameprep, saslprep and ldapprep

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@22551 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/wind/stringprep.c

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2004, 2006, 2008 Kungliga Tekniska H<>gskolan
+ * (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 <config.h>
+#endif
+#include "windlocl.h"
+#include <stdlib.h>
+#include <strings.h>
+
+RCSID("$Id$");
+
+/**
+ * Process a input UCS4 string according a string-prep profile.
+ *
+ * @param in input UCS4 string to process
+ * @param in_len length of the input string
+ * @param out output UCS4 string
+ * @param out_len length of the output string.
+ * @param flags stringprep profile.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_stringprep(const uint32_t *in, size_t in_len,
+		uint32_t *out, size_t *out_len,
+		wind_profile_flags flags)
+{
+    size_t tmp_len = in_len * 3;
+    uint32_t *tmp = malloc(tmp_len * sizeof(uint32_t));
+    int ret;
+
+    if (tmp == NULL)
+	return -1;
+
+    ret = _wind_stringprep_map(in, in_len, tmp, &tmp_len, flags);
+    if (ret) {
+	free(tmp);
+	return ret;
+    }
+    ret = _wind_stringprep_normalize(tmp, tmp_len, out, out_len);
+    free(tmp);
+    if (ret)
+	return ret;
+    ret = _wind_stringprep_prohibited(out, *out_len, flags);
+    if (ret)
+	return ret;
+    ret = _wind_stringprep_testbidi(out, *out_len, flags);
+    if (ret)
+	return ret;
+    return 0;
+}
+
+static struct {
+    const char *name;
+    wind_profile_flags flags;
+} profiles[] = {
+    { "nameprep", WIND_PROFILE_NAME },
+    { "saslprep", WIND_PROFILE_SASL },
+    { "ldapprep", WIND_PROFILE_LDAP }
+};
+
+/**
+ * Try to find the profile given a name.
+ *
+ * @param name name of the profile.
+ * @param flags the resulting profile.
+ *
+ * @return returns 0 on success, an wind error code otherwise
+ * @ingroup wind
+ */
+
+int
+wind_profile(const char *name, wind_profile_flags *flags)
+{
+    unsigned int i;
+
+    for (i = 0; i < sizeof(profiles)/sizeof(profiles[0]); i++) {
+	if (strcasecmp(profiles[i].name, name) == 0) {
+	    *flags = profiles[i].flags;
+	    return 0;
+	}
+    }
+    return -1;
+}