1 files changed, 76 insertions, 0 deletions

diff --git a/groupaccess.c b/groupaccess.c
new file mode 100644
index 000000000..bf6be997e
--- /dev/null
+++ b/groupaccess.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2001 Kevin Steves.  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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 "includes.h"
+
+#include "groupaccess.h"
+#include "ssh.h"
+#include "xmalloc.h"
+#include "match.h"
+
+static int ngroups;
+static char *groups_byname[NGROUPS_MAX + 1];    /* +1 for base/primary group */
+
+int
+ga_init(const char *user, gid_t base)
+{
+        gid_t groups_bygid[NGROUPS_MAX + 1];
+        int i, j;
+        struct group *gr;
+
+        if (ngroups > 0)
+                ga_free();
+
+        ngroups = sizeof(groups_bygid) / sizeof(gid_t);
+        if (getgrouplist(user, base, groups_bygid, &ngroups) == -1)
+                log("getgrouplist: groups list too small");
+        for (i = 0, j = 0; i < ngroups; i++)
+                if ((gr = getgrgid(groups_bygid[i])) != NULL)
+                        groups_byname[j++] = xstrdup(gr->gr_name);
+        return (ngroups = j);
+}
+
+int
+ga_match(char * const *groups, int n)
+{
+        int i, j;
+
+        for (i = 0; i < ngroups; i++)
+                for (j = 0; j < n; j++)
+                        if (match_pattern(groups_byname[i], groups[j]))
+                                return 1;
+        return 0;
+}
+
+void
+ga_free(void)
+{
+        int i;
+
+        if (ngroups > 0) {
+                for (i = 0; i < ngroups; i++)
+                        xfree(groups_byname[i]);
+                ngroups = 0;
+        }
+}