Left out of original commit.

diff --git a/lib/kname_parse.c b/lib/kname_parse.c
new file mode 100644 (file)
index 0000000..047bb47
--- /dev/null
+++ b/lib/kname_parse.c
@@ -0,0 +1,119 @@
+/* $Id$
+ *
+ * Provide a copy of kname_parse() from krb4 for when krb4 is no
+ * longer available.
+ *
+ * Copyright (C) 2009 by the Massachusetts Institute of Technology
+ * For copying and distribution information, please see the file
+ * <mit-copyright.h>.
+ */
+
+#include <mit-copyright.h>
+#include <moira.h>
+
+#include <string.h>
+
+#ifdef HAVE_KRB4
+#include <krb.h>
+#else
+#include <mr_krb.h>
+
+#define KRBET_KNAME_FMT                          (39525457L)
+#define KNAME_FMT                                (KRBET_KNAME_FMT - ERROR_TABLE_BASE_krb)
+#endif
+
+RCSID("$Header$");
+
+#define NAME    0               /* which field are we in? */
+#define INST    1
+#define REALM   2
+
+int mr_kname_parse(char *np, char *ip, char *rp, char *fullname)
+{
+  char buf[MAX_K_NAME_SZ];
+  char *rnext, *wnext;        /* next char to read, write */
+  register char c;
+  int backslash;
+  int field;
+
+  backslash = 0;
+  rnext = buf;
+  wnext = np;
+  field = NAME;
+
+  if (strlen(fullname) > MAX_K_NAME_SZ)
+    return KNAME_FMT;
+  (void) strcpy(buf, fullname);
+
+  while ((c = *rnext++)) {
+    if (backslash) {
+      *wnext++ = c;
+      backslash = 0;
+      continue;
+    }
+    switch (c) {
+    case '\\':
+      backslash++;
+      break;
+    case '.':
+      switch (field) {
+      case NAME:
+        if (wnext == np)
+          return KNAME_FMT;
+        *wnext = '\0';
+        field = INST;
+        wnext = ip;
+        break;
+      case INST:          /* We now allow period in instance */
+      case REALM:
+        *wnext++ = c;
+        break;
+      default:
+        return KNAME_FMT;
+      }
+      break;
+    case '@':
+      switch (field) {
+      case NAME:
+        if (wnext == np)
+          return KNAME_FMT;
+        *ip = '\0';
+        /* fall through */
+      case INST:
+        *wnext = '\0';
+        field = REALM;
+        wnext = rp;
+        break;
+      case REALM:
+        return KNAME_FMT;
+      default:
+        return KNAME_FMT;
+      }
+      break;
+    default:
+      *wnext++ = c;
+    }
+    /*
+     * Paranoia: check length each time through to ensure that we
+     * don't overwrite things.
+     */
+    switch (field) {
+    case NAME:
+      if (wnext - np >= ANAME_SZ)
+        return KNAME_FMT;
+      break;
+    case INST:
+      if (wnext - ip >= INST_SZ)
+        return KNAME_FMT;
+      break;
+    case REALM:
+      if (wnext - rp >= REALM_SZ)
+        return KNAME_FMT;
+      break;
+    default:
+      return KNAME_FMT;
+    }
+  }
+  *wnext = '\0';
+  return 0;
+}