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git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@1019 dc483132-0cff-0310-8789-dd5450dbe970

diff --git a/src/lib/krb5/keytab/ktbase.c b/src/lib/krb5/keytab/ktbase.c
new file mode 100644 (file)
index 0000000..da2aa65
--- /dev/null
+++ b/src/lib/krb5/keytab/ktbase.c
@@ -0,0 +1,95 @@
+/*
+ * $Source$
+ * $Author$
+ *
+ * Copyright 1990 by the Massachusetts Institute of Technology.
+ *
+ * For copying and distribution information, please see the file
+ * <krb5/copyright.h>.
+ *
+ * Registration functions for ccache.
+ */
+
+#if !defined(lint) && !defined(SABER)
+static char rcsid_ktbase_c[] =
+"$Id$";
+#endif /* !lint & !SABER */
+
+#include <krb5/copyright.h>
+#include <krb5/krb5.h>
+#include <krb5/ext-proto.h>
+
+struct krb5_kt_typelist
+ {
+  krb5_kt_ops *ops;
+  struct krb5_kt_typelist *next;
+ };
+static struct krb5_kt_typelist krb5_kt_typelist_dfl = { &krb5_kt_dfl_ops, 0 };
+static struct krb5_kt_typelist *kt_typehead = &krb5_kt_typelist_dfl;
+
+/*
+ * Register a new credentials cache type
+ * If override is set, replace any existing ccache with that type tag
+ */
+
+krb5_error_code
+krb5_kt_register(ops)
+krb5_kt_ops *ops;
+{
+    struct krb5_kt_typelist *t;
+    for (t = kt_typehead;t && strcmp(t->ops->prefix,ops->prefix);t = t->next)
+       ;
+    if (t) {
+       return KRB5_KT_TYPE_EXISTS;
+    }
+    if (!(t = (struct krb5_kt_typelist *) malloc(sizeof(*t))))
+       return ENOMEM;                  /* XXX */
+    t->next = kt_typehead;
+    t->ops = ops;
+    kt_typehead = t;
+    return 0;
+}
+
+/*
+ * Resolve a key table name into a keytab object.
+ *
+ * The name is currently constrained to be of the form "type:residual";
+ *
+ * The "type" portion corresponds to one of the registered key table
+ * types, while the "residual" portion is specific to the
+ * particular keytab type.
+ */
+
+krb5_error_code krb5_kt_resolve (name, ktid)
+    char *name;
+    krb5_keytab *ktid;
+{
+    struct krb5_kt_typelist *tlist;
+    char *pfx, *resid, *cp;
+    int pfxlen;
+    
+    cp = strchr (name, ':');
+    if (!cp)
+       return KRB5_KT_BADNAME;
+
+    pfxlen = cp - name;
+    resid = name + pfxlen + 1;
+       
+    pfx = malloc (pfxlen+1);
+    if (!pfx)
+       return ENOMEM;
+
+    memcpy (pfx, name, pfxlen);
+    pfx[pfxlen] = '\0';
+
+    *ktid = (krb5_keytab) 0;
+
+    for (tlist = kt_typehead; tlist; tlist = tlist->next) {
+       if (strcmp (tlist->ops->prefix, pfx) == 0) {
+           free(pfx);
+           return (*tlist->ops->resolve)(resid, ktid);
+       }
+    }
+    free(pfx);
+    return KRB5_KT_UNKNOWN_TYPE;
+}