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-rw-r--r--third_party/heimdal/appl/gssmask/common.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/third_party/heimdal/appl/gssmask/common.c b/third_party/heimdal/appl/gssmask/common.c
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+++ b/third_party/heimdal/appl/gssmask/common.c
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+/*
+ * Copyright (c) 2006 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 KTH 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 KTH AND ITS 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 KTH OR ITS 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.
+ */
+
+#include <common.h>
+RCSID("$Id$");
+
+krb5_error_code
+store_string(krb5_storage *sp, const char *str)
+{
+ size_t len = strlen(str) + 1;
+ krb5_error_code ret;
+
+ ret = krb5_store_int32(sp, len);
+ if (ret)
+ return ret;
+ ret = krb5_storage_write(sp, str, len);
+ if (ret != len)
+ return EINVAL;
+ return 0;
+}
+
+static void
+add_list(char ****list, size_t *listlen, char **str, size_t len)
+{
+ size_t i;
+ *list = erealloc(*list, sizeof(**list) * (*listlen + 1));
+
+ (*list)[*listlen] = ecalloc(len, sizeof(**list));
+ for (i = 0; i < len; i++)
+ (*list)[*listlen][i] = str[i];
+ (*listlen)++;
+}
+
+static void
+permute(char ****list, size_t *listlen,
+ char **str, const int start, const int len)
+{
+ int i, j;
+
+#define SWAP(s,i,j) { char *t = str[i]; str[i] = str[j]; str[j] = t; }
+
+ for (i = start; i < len - 1; i++) {
+ for (j = i+1; j < len; j++) {
+ SWAP(str,i,j);
+ permute(list, listlen, str, i+1, len);
+ SWAP(str,i,j);
+ }
+ }
+ add_list(list, listlen, str, len);
+}
+
+char ***
+permutate_all(struct getarg_strings *strings, size_t *size)
+{
+ char **list, ***all = NULL;
+ int i;
+
+ *size = 0;
+
+ list = ecalloc(strings->num_strings, sizeof(*list));
+ for (i = 0; i < strings->num_strings; i++)
+ list[i] = strings->strings[i];
+
+ permute(&all, size, list, 0, strings->num_strings);
+ free(list);
+ return all;
+}