r8302: import mini HEIMDAL into the tree

(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)

1 files changed, 180 insertions, 0 deletions

diff --git a/source4/heimdal/lib/krb5/mk_req_ext.c b/source4/heimdal/lib/krb5/mk_req_ext.c
new file mode 100644
index 0000000000..ab83d912ea
--- /dev/null
+++ b/source4/heimdal/lib/krb5/mk_req_ext.c
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 1997 - 2002 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 the Institute 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 THE INSTITUTE AND 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 THE INSTITUTE OR 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 <krb5_locl.h>
+
+RCSID("$Id: mk_req_ext.c,v 1.30 2005/01/05 06:31:01 lukeh Exp $");
+
+krb5_error_code
+_krb5_mk_req_internal(krb5_context context,
+		      krb5_auth_context *auth_context,
+		      const krb5_flags ap_req_options,
+		      krb5_data *in_data,
+		      krb5_creds *in_creds,
+		      krb5_data *outbuf,
+		      krb5_key_usage checksum_usage,
+		      krb5_key_usage encrypt_usage)
+{
+  krb5_error_code ret;
+  krb5_data authenticator;
+  Checksum c;
+  Checksum *c_opt;
+  krb5_auth_context ac;
+
+  if(auth_context) {
+      if(*auth_context == NULL)
+	  ret = krb5_auth_con_init(context, auth_context);
+      else
+	  ret = 0;
+      ac = *auth_context;
+  } else
+      ret = krb5_auth_con_init(context, &ac);
+  if(ret)
+      return ret;
+      
+  if(ac->local_subkey == NULL && (ap_req_options & AP_OPTS_USE_SUBKEY)) {
+      ret = krb5_auth_con_generatelocalsubkey(context, ac, &in_creds->session);
+      if(ret)
+	  return ret;
+  }
+
+#if 0
+  {
+      /* This is somewhat bogus since we're possibly overwriting a
+         value specified by the user, but it's the easiest way to make
+         the code use a compatible enctype */
+      Ticket ticket;
+      krb5_keytype ticket_keytype;
+
+      ret = decode_Ticket(in_creds->ticket.data, 
+			  in_creds->ticket.length, 
+			  &ticket, 
+			  NULL);
+      krb5_enctype_to_keytype (context,
+			       ticket.enc_part.etype,
+			       &ticket_keytype);
+
+      if (ticket_keytype == in_creds->session.keytype)
+	  krb5_auth_setenctype(context, 
+			       ac,
+			       ticket.enc_part.etype);
+      free_Ticket(&ticket);
+  }
+#endif
+
+  krb5_free_keyblock(context, ac->keyblock);
+  krb5_copy_keyblock(context, &in_creds->session, &ac->keyblock);
+  
+  /* it's unclear what type of checksum we can use.  try the best one, except:
+   * a) if it's configured differently for the current realm, or
+   * b) if the session key is des-cbc-crc
+   */
+
+  if (in_data) {
+      if(ac->keyblock->keytype == ETYPE_DES_CBC_CRC) {
+	  /* this is to make DCE secd (and older MIT kdcs?) happy */
+	  ret = krb5_create_checksum(context, 
+				     NULL,
+				     0,
+				     CKSUMTYPE_RSA_MD4,
+				     in_data->data,
+				     in_data->length,
+				     &c);
+      } else if(ac->keyblock->keytype == ETYPE_ARCFOUR_HMAC_MD5 ||
+		ac->keyblock->keytype == ETYPE_ARCFOUR_HMAC_MD5_56) {
+	  /* this is to make MS kdc happy */ 
+	  ret = krb5_create_checksum(context, 
+				     NULL,
+				     0,
+				     CKSUMTYPE_RSA_MD5,
+				     in_data->data,
+				     in_data->length,
+				     &c);
+      } else {
+	  krb5_crypto crypto;
+
+	  ret = krb5_crypto_init(context, ac->keyblock, 0, &crypto);
+	  if (ret)
+	      return ret;
+	  ret = krb5_create_checksum(context, 
+				     crypto,
+				     checksum_usage,
+				     0,
+				     in_data->data,
+				     in_data->length,
+				     &c);
+      
+	  krb5_crypto_destroy(context, crypto);
+      }
+      c_opt = &c;
+  } else {
+      c_opt = NULL;
+  }
+  
+  ret = krb5_build_authenticator (context,
+				  ac,
+				  ac->keyblock->keytype,
+				  in_creds,
+				  c_opt,
+				  NULL,
+				  &authenticator,
+				  encrypt_usage);
+  if (c_opt)
+      free_Checksum (c_opt);
+  if (ret)
+    return ret;
+
+  ret = krb5_build_ap_req (context, ac->keyblock->keytype, 
+			   in_creds, ap_req_options, authenticator, outbuf);
+  if(auth_context == NULL)
+      krb5_auth_con_free(context, ac);
+  return ret;
+}
+
+krb5_error_code KRB5_LIB_FUNCTION
+krb5_mk_req_extended(krb5_context context,
+		     krb5_auth_context *auth_context,
+		     const krb5_flags ap_req_options,
+		     krb5_data *in_data,
+		     krb5_creds *in_creds,
+		     krb5_data *outbuf)
+{
+    return _krb5_mk_req_internal (context,
+				 auth_context,
+				 ap_req_options,
+				 in_data,
+				 in_creds,
+				 outbuf,
+				 KRB5_KU_AP_REQ_AUTH_CKSUM,
+				 KRB5_KU_AP_REQ_AUTH);
+}