Kerberos IV code, based on a merge of fixed code from KTH and original

4.4BSD Lite code (international edition).  Provides all functionality
from the original 4.4BSD code plus standard Kerberos elements that were
omitted in the 4.4BSD code.

1 files changed, 153 insertions, 0 deletions

diff --git a/kerberosIV/kdb/krb_kdb_utils.c b/kerberosIV/kdb/krb_kdb_utils.c
new file mode 100644
index 00000000000..c41060751fd
--- /dev/null
+++ b/kerberosIV/kdb/krb_kdb_utils.c
@@ -0,0 +1,153 @@
+/*	$Id: krb_kdb_utils.c,v 1.1 1995/12/14 06:52:36 tholo Exp $	*/
+
+/*-
+ * Copyright (C) 1989 by the Massachusetts Institute of Technology
+ *
+ * Export of this software from the United States of America is assumed
+ * to require a specific license from the United States Government.
+ * It is the responsibility of any person or organization contemplating
+ * export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/*
+ * Utility routines for Kerberos programs which directly access
+ * the database.  This code was duplicated in too many places
+ * before I gathered it here.
+ *
+ * Jon Rochlis, MIT Telecom, March 1988
+ */
+
+#include "kdb_locl.h"
+
+#include <kdc.h>
+
+long 
+kdb_get_master_key(prompt, master_key, master_key_sched)
+	int prompt;
+	des_cblock *master_key;
+	struct des_ks_struct *master_key_sched;
+{
+  int kfile;
+
+  if (prompt)  {
+#ifdef NOENCRYPTION
+      placebo_read_password(master_key,
+			    "\nEnter Kerberos master key: ", 0);
+#else
+      des_read_password(master_key,
+			     "\nEnter Kerberos master key: ", 0);
+#endif
+      printf ("\n");
+  }
+  else {
+    kfile = open(MKEYFILE, O_RDONLY, 0600);
+    if (kfile < 0) {
+      /* oh, for com_err_ */
+      return (-1);
+    }
+    if (read(kfile, (char *) master_key, 8) != 8) {
+      return (-1);
+    }
+    close(kfile);
+  }
+
+#ifndef NOENCRYPTION
+  des_key_sched(master_key,master_key_sched);
+#endif
+  return (0);
+}
+
+/* The old algorithm used the key schedule as the initial vector which
+   was byte order depedent ... */
+
+void
+kdb_encrypt_key (in, out, master_key, master_key_sched, e_d_flag)
+	des_cblock *in;
+	des_cblock *out;
+	des_cblock *master_key;
+	struct des_ks_struct *master_key_sched;
+	int e_d_flag;
+{
+
+#ifdef NOENCRYPTION
+  bcopy(in, out, sizeof(des_cblock));
+#else
+  des_pcbc_encrypt(in,out,(long)sizeof(des_cblock),master_key_sched,master_key,
+ 	e_d_flag);
+#endif
+}
+
+/* The caller is reasponsible for cleaning up the master key and sched,
+   even if we can't verify the master key */
+
+/* Returns master key version if successful, otherwise -1 */
+
+long 
+kdb_verify_master_key (master_key, master_key_sched, out)
+	des_cblock *master_key;
+	struct des_ks_struct *master_key_sched;
+	FILE *out;		/* setting this to non-null be do output */
+{
+  des_cblock key_from_db;
+  Principal principal_data[1];
+  int n, more = 0;
+  long master_key_version;
+
+  /* lookup the master key version */
+  n = kerb_get_principal(KERB_M_NAME, KERB_M_INST, principal_data,
+			 1 /* only one please */, &more);
+  if ((n != 1) || more) {
+    if (out != (FILE *) NULL) 
+      fprintf(out,
+	      "verify_master_key: %s, %d found.\n",
+	      "Kerberos error on master key version lookup",
+	      n);
+    return (-1);
+  }
+
+  master_key_version = (long) principal_data[0].key_version;
+
+  /* set up the master key */
+  if (out != (FILE *) NULL)  /* should we punt this? */
+    fprintf(out, "Current Kerberos master key version is %d.\n",
+	    principal_data[0].kdc_key_ver);
+
+  /*
+   * now use the master key to decrypt the key in the db, had better
+   * be the same! 
+   */
+  bcopy(&principal_data[0].key_low, key_from_db, 4);
+  bcopy(&principal_data[0].key_high, ((long *) key_from_db) + 1, 4);
+  kdb_encrypt_key (&key_from_db, &key_from_db, 
+		   master_key, master_key_sched, DES_DECRYPT);
+
+  /* the decrypted database key had better equal the master key */
+  n = bcmp((char *) master_key, (char *) key_from_db,
+	   sizeof(master_key));
+  /* this used to zero the master key here! */
+  bzero(key_from_db, sizeof(key_from_db));
+  bzero(principal_data, sizeof (principal_data));
+
+  if (n && (out != (FILE *) NULL)) {
+    fprintf(out, "\n\07\07verify_master_key: Invalid master key; ");
+    fprintf(out, "does not match database.\n");
+    return (-1);
+  }
+  if (out != (FILE *) NULL) {
+    fprintf(out, "\nMaster key entered.  BEWARE!\07\07\n");
+    fflush(out);
+  }
+
+  return (master_key_version);
+}