r8302: import mini HEIMDAL into the tree

(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)

1 files changed, 302 insertions, 0 deletions

diff --git a/source4/heimdal/lib/gssapi/get_mic.c b/source4/heimdal/lib/gssapi/get_mic.c
new file mode 100644
index 0000000000..1c950e95d9
--- /dev/null
+++ b/source4/heimdal/lib/gssapi/get_mic.c
@@ -0,0 +1,302 @@
+/*
+ * Copyright (c) 1997 - 2003 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 "gssapi_locl.h"
+
+RCSID("$Id: get_mic.c,v 1.29 2005/01/05 02:52:12 lukeh Exp $");
+
+static OM_uint32
+mic_des
+           (OM_uint32 * minor_status,
+            const gss_ctx_id_t context_handle,
+            gss_qop_t qop_req,
+            const gss_buffer_t message_buffer,
+            gss_buffer_t message_token,
+	    krb5_keyblock *key
+           )
+{
+  u_char *p;
+  MD5_CTX md5;
+  u_char hash[16];
+  DES_key_schedule schedule;
+  DES_cblock deskey;
+  DES_cblock zero;
+  int32_t seq_number;
+  size_t len, total_len;
+
+  gssapi_krb5_encap_length (22, &len, &total_len, GSS_KRB5_MECHANISM);
+
+  message_token->length = total_len;
+  message_token->value  = malloc (total_len);
+  if (message_token->value == NULL) {
+    *minor_status = ENOMEM;
+    return GSS_S_FAILURE;
+  }
+
+  p = gssapi_krb5_make_header(message_token->value,
+			      len,
+			      "\x01\x01", /* TOK_ID */
+			      GSS_KRB5_MECHANISM); 
+
+  memcpy (p, "\x00\x00", 2);	/* SGN_ALG = DES MAC MD5 */
+  p += 2;
+
+  memcpy (p, "\xff\xff\xff\xff", 4); /* Filler */
+  p += 4;
+
+  /* Fill in later (SND-SEQ) */
+  memset (p, 0, 16);
+  p += 16;
+
+  /* checksum */
+  MD5_Init (&md5);
+  MD5_Update (&md5, p - 24, 8);
+  MD5_Update (&md5, message_buffer->value, message_buffer->length);
+  MD5_Final (hash, &md5);
+
+  memset (&zero, 0, sizeof(zero));
+  memcpy (&deskey, key->keyvalue.data, sizeof(deskey));
+  DES_set_key (&deskey, &schedule);
+  DES_cbc_cksum ((void *)hash, (void *)hash, sizeof(hash),
+		 &schedule, &zero);
+  memcpy (p - 8, hash, 8);	/* SGN_CKSUM */
+
+  HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+  /* sequence number */
+  krb5_auth_con_getlocalseqnumber (gssapi_krb5_context,
+			       context_handle->auth_context,
+			       &seq_number);
+
+  p -= 16;			/* SND_SEQ */
+  p[0] = (seq_number >> 0)  & 0xFF;
+  p[1] = (seq_number >> 8)  & 0xFF;
+  p[2] = (seq_number >> 16) & 0xFF;
+  p[3] = (seq_number >> 24) & 0xFF;
+  memset (p + 4,
+	  (context_handle->more_flags & LOCAL) ? 0 : 0xFF,
+	  4);
+
+  DES_set_key (&deskey, &schedule);
+  DES_cbc_encrypt ((void *)p, (void *)p, 8,
+		   &schedule, (DES_cblock *)(p + 8), DES_ENCRYPT);
+
+  krb5_auth_con_setlocalseqnumber (gssapi_krb5_context,
+			       context_handle->auth_context,
+			       ++seq_number);
+  HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+  
+  memset (deskey, 0, sizeof(deskey));
+  memset (&schedule, 0, sizeof(schedule));
+  
+  *minor_status = 0;
+  return GSS_S_COMPLETE;
+}
+
+static OM_uint32
+mic_des3
+           (OM_uint32 * minor_status,
+            const gss_ctx_id_t context_handle,
+            gss_qop_t qop_req,
+            const gss_buffer_t message_buffer,
+            gss_buffer_t message_token,
+	    krb5_keyblock *key
+           )
+{
+  u_char *p;
+  Checksum cksum;
+  u_char seq[8];
+
+  int32_t seq_number;
+  size_t len, total_len;
+
+  krb5_crypto crypto;
+  krb5_error_code kret;
+  krb5_data encdata;
+  char *tmp;
+  char ivec[8];
+
+  gssapi_krb5_encap_length (36, &len, &total_len, GSS_KRB5_MECHANISM);
+
+  message_token->length = total_len;
+  message_token->value  = malloc (total_len);
+  if (message_token->value == NULL) {
+      *minor_status = ENOMEM;
+      return GSS_S_FAILURE;
+  }
+
+  p = gssapi_krb5_make_header(message_token->value,
+			      len,
+			      "\x01\x01", /* TOK-ID */
+			      GSS_KRB5_MECHANISM);
+
+  memcpy (p, "\x04\x00", 2);	/* SGN_ALG = HMAC SHA1 DES3-KD */
+  p += 2;
+
+  memcpy (p, "\xff\xff\xff\xff", 4); /* filler */
+  p += 4;
+
+  /* this should be done in parts */
+
+  tmp = malloc (message_buffer->length + 8);
+  if (tmp == NULL) {
+      free (message_token->value);
+      *minor_status = ENOMEM;
+      return GSS_S_FAILURE;
+  }
+  memcpy (tmp, p - 8, 8);
+  memcpy (tmp + 8, message_buffer->value, message_buffer->length);
+
+  kret = krb5_crypto_init(gssapi_krb5_context, key, 0, &crypto);
+  if (kret) {
+      free (message_token->value);
+      free (tmp);
+      gssapi_krb5_set_error_string ();
+      *minor_status = kret;
+      return GSS_S_FAILURE;
+  }
+
+  kret = krb5_create_checksum (gssapi_krb5_context,
+			       crypto,
+			       KRB5_KU_USAGE_SIGN,
+			       0,
+			       tmp,
+			       message_buffer->length + 8,
+			       &cksum);
+  free (tmp);
+  krb5_crypto_destroy (gssapi_krb5_context, crypto);
+  if (kret) {
+      free (message_token->value);
+      gssapi_krb5_set_error_string ();
+      *minor_status = kret;
+      return GSS_S_FAILURE;
+  }
+
+  memcpy (p + 8, cksum.checksum.data, cksum.checksum.length);
+
+  HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+  /* sequence number */
+  krb5_auth_con_getlocalseqnumber (gssapi_krb5_context,
+			       context_handle->auth_context,
+			       &seq_number);
+
+  seq[0] = (seq_number >> 0)  & 0xFF;
+  seq[1] = (seq_number >> 8)  & 0xFF;
+  seq[2] = (seq_number >> 16) & 0xFF;
+  seq[3] = (seq_number >> 24) & 0xFF;
+  memset (seq + 4,
+	  (context_handle->more_flags & LOCAL) ? 0 : 0xFF,
+	  4);
+
+  kret = krb5_crypto_init(gssapi_krb5_context, key,
+			  ETYPE_DES3_CBC_NONE, &crypto);
+  if (kret) {
+      free (message_token->value);
+      gssapi_krb5_set_error_string ();
+      *minor_status = kret;
+      return GSS_S_FAILURE;
+  }
+
+  if (context_handle->more_flags & COMPAT_OLD_DES3)
+      memset(ivec, 0, 8);
+  else
+      memcpy(ivec, p + 8, 8);
+
+  kret = krb5_encrypt_ivec (gssapi_krb5_context,
+			    crypto,
+			    KRB5_KU_USAGE_SEQ,
+			    seq, 8, &encdata, ivec);
+  krb5_crypto_destroy (gssapi_krb5_context, crypto);
+  if (kret) {
+      free (message_token->value);
+      gssapi_krb5_set_error_string ();
+      *minor_status = kret;
+      return GSS_S_FAILURE;
+  }
+  
+  assert (encdata.length == 8);
+
+  memcpy (p, encdata.data, encdata.length);
+  krb5_data_free (&encdata);
+
+  krb5_auth_con_setlocalseqnumber (gssapi_krb5_context,
+			       context_handle->auth_context,
+			       ++seq_number);
+  HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+  
+  free_Checksum (&cksum);
+  *minor_status = 0;
+  return GSS_S_COMPLETE;
+}
+
+OM_uint32 gss_get_mic
+           (OM_uint32 * minor_status,
+            const gss_ctx_id_t context_handle,
+            gss_qop_t qop_req,
+            const gss_buffer_t message_buffer,
+            gss_buffer_t message_token
+           )
+{
+  krb5_keyblock *key;
+  OM_uint32 ret;
+  krb5_keytype keytype;
+
+  ret = gss_krb5_get_subkey(context_handle, &key);
+  if (ret) {
+      gssapi_krb5_set_error_string ();
+      *minor_status = ret;
+      return GSS_S_FAILURE;
+  }
+  krb5_enctype_to_keytype (gssapi_krb5_context, key->keytype, &keytype);
+
+  switch (keytype) {
+  case KEYTYPE_DES :
+      ret = mic_des (minor_status, context_handle, qop_req,
+		     message_buffer, message_token, key);
+      break;
+  case KEYTYPE_DES3 :
+      ret = mic_des3 (minor_status, context_handle, qop_req,
+		      message_buffer, message_token, key);
+      break;
+  case KEYTYPE_ARCFOUR:
+  case KEYTYPE_ARCFOUR_56:
+      ret = _gssapi_get_mic_arcfour (minor_status, context_handle, qop_req,
+				     message_buffer, message_token, key);
+      break;
+  default :
+      ret = _gssapi_mic_cfx (minor_status, context_handle, qop_req,
+			     message_buffer, message_token, key);
+      break;
+  }
+  krb5_free_keyblock (gssapi_krb5_context, key);
+  return ret;
+}