r8302: import mini HEIMDAL into the tree

(This used to be commit 118be28a7aef233799956615a99d1a2a74dac175)

1 files changed, 246 insertions, 0 deletions

diff --git a/source4/heimdal/lib/gssapi/8003.c b/source4/heimdal/lib/gssapi/8003.c
new file mode 100644
index 0000000000..b60d2608e2
--- /dev/null
+++ b/source4/heimdal/lib/gssapi/8003.c
@@ -0,0 +1,246 @@
+/*
+ * 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: 8003.c,v 1.17 2005/04/01 08:55:36 lha Exp $");
+
+krb5_error_code
+gssapi_encode_om_uint32(OM_uint32 n, u_char *p)
+{
+  p[0] = (n >> 0)  & 0xFF;
+  p[1] = (n >> 8)  & 0xFF;
+  p[2] = (n >> 16) & 0xFF;
+  p[3] = (n >> 24) & 0xFF;
+  return 0;
+}
+
+krb5_error_code
+gssapi_encode_be_om_uint32(OM_uint32 n, u_char *p)
+{
+  p[0] = (n >> 24) & 0xFF;
+  p[1] = (n >> 16) & 0xFF;
+  p[2] = (n >> 8)  & 0xFF;
+  p[3] = (n >> 0)  & 0xFF;
+  return 0;
+}
+
+krb5_error_code
+gssapi_decode_om_uint32(u_char *p, OM_uint32 *n)
+{
+    *n = (p[0] << 0) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
+    return 0;
+}
+
+krb5_error_code
+gssapi_decode_be_om_uint32(u_char *p, OM_uint32 *n)
+{
+    *n = (p[0] <<24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
+    return 0;
+}
+
+static krb5_error_code
+hash_input_chan_bindings (const gss_channel_bindings_t b,
+			  u_char *p)
+{
+  u_char num[4];
+  MD5_CTX md5;
+
+  MD5_Init(&md5);
+  gssapi_encode_om_uint32 (b->initiator_addrtype, num);
+  MD5_Update (&md5, num, sizeof(num));
+  gssapi_encode_om_uint32 (b->initiator_address.length, num);
+  MD5_Update (&md5, num, sizeof(num));
+  if (b->initiator_address.length)
+    MD5_Update (&md5,
+		b->initiator_address.value,
+		b->initiator_address.length);
+  gssapi_encode_om_uint32 (b->acceptor_addrtype, num);
+  MD5_Update (&md5, num, sizeof(num));
+  gssapi_encode_om_uint32 (b->acceptor_address.length, num);
+  MD5_Update (&md5, num, sizeof(num));
+  if (b->acceptor_address.length)
+    MD5_Update (&md5,
+		b->acceptor_address.value,
+		b->acceptor_address.length);
+  gssapi_encode_om_uint32 (b->application_data.length, num);
+  MD5_Update (&md5, num, sizeof(num));
+  if (b->application_data.length)
+    MD5_Update (&md5,
+		b->application_data.value,
+		b->application_data.length);
+  MD5_Final (p, &md5);
+  return 0;
+}
+
+/*
+ * create a checksum over the chanel bindings in
+ * `input_chan_bindings', `flags' and `fwd_data' and return it in
+ * `result'
+ */
+
+OM_uint32
+gssapi_krb5_create_8003_checksum (
+		      OM_uint32 *minor_status,    
+		      const gss_channel_bindings_t input_chan_bindings,
+		      OM_uint32 flags,
+		      const krb5_data *fwd_data,
+		      Checksum *result)
+{
+    u_char *p;
+
+    /* 
+     * see rfc1964 (section 1.1.1 (Initial Token), and the checksum value 
+     * field's format) */
+    result->cksumtype = CKSUMTYPE_GSSAPI;
+    if (fwd_data->length > 0 && (flags & GSS_C_DELEG_FLAG))
+	result->checksum.length = 24 + 4 + fwd_data->length;
+    else 
+	result->checksum.length = 24;
+    result->checksum.data   = malloc (result->checksum.length);
+    if (result->checksum.data == NULL) {
+	*minor_status = ENOMEM;
+	return GSS_S_FAILURE;
+    }
+  
+    p = result->checksum.data;
+    gssapi_encode_om_uint32 (16, p);
+    p += 4;
+    if (input_chan_bindings == GSS_C_NO_CHANNEL_BINDINGS) {
+	memset (p, 0, 16);
+    } else {
+	hash_input_chan_bindings (input_chan_bindings, p);
+    }
+    p += 16;
+    gssapi_encode_om_uint32 (flags, p);
+    p += 4;
+
+    if (fwd_data->length > 0 && (flags & GSS_C_DELEG_FLAG)) {
+
+	*p++ = (1 >> 0) & 0xFF;                   /* DlgOpt */ /* == 1 */
+	*p++ = (1 >> 8) & 0xFF;                   /* DlgOpt */ /* == 0 */
+	*p++ = (fwd_data->length >> 0) & 0xFF;    /* Dlgth  */
+	*p++ = (fwd_data->length >> 8) & 0xFF;    /* Dlgth  */
+	memcpy(p, (unsigned char *) fwd_data->data, fwd_data->length);
+
+	p += fwd_data->length;
+    }
+     
+    return GSS_S_COMPLETE;
+}
+
+/*
+ * verify the checksum in `cksum' over `input_chan_bindings'
+ * returning  `flags' and `fwd_data'
+ */
+
+OM_uint32
+gssapi_krb5_verify_8003_checksum(
+		      OM_uint32 *minor_status,    
+		      const gss_channel_bindings_t input_chan_bindings,
+		      const Checksum *cksum,
+		      OM_uint32 *flags,
+		      krb5_data *fwd_data)
+{
+    unsigned char hash[16];
+    unsigned char *p;
+    OM_uint32 length;
+    int DlgOpt;
+    static unsigned char zeros[16];
+
+    if (cksum == NULL) {
+	*minor_status = 0;
+	return GSS_S_BAD_BINDINGS;
+    }
+
+    /* XXX should handle checksums > 24 bytes */
+    if(cksum->cksumtype != CKSUMTYPE_GSSAPI || cksum->checksum.length < 24) {
+	*minor_status = 0;
+	return GSS_S_BAD_BINDINGS;
+    }
+    
+    p = cksum->checksum.data;
+    gssapi_decode_om_uint32(p, &length);
+    if(length != sizeof(hash)) {
+	*minor_status = 0;
+	return GSS_S_BAD_BINDINGS;
+    }
+    
+    p += 4;
+    
+    if (input_chan_bindings != GSS_C_NO_CHANNEL_BINDINGS
+	&& memcmp(p, zeros, sizeof(zeros)) != 0) {
+	if(hash_input_chan_bindings(input_chan_bindings, hash) != 0) {
+	    *minor_status = 0;
+	    return GSS_S_BAD_BINDINGS;
+	}
+	if(memcmp(hash, p, sizeof(hash)) != 0) {
+	    *minor_status = 0;
+	    return GSS_S_BAD_BINDINGS;
+	}
+    }
+    
+    p += sizeof(hash);
+    
+    gssapi_decode_om_uint32(p, flags);
+    p += 4;
+
+    if (cksum->checksum.length > 24 && (*flags & GSS_C_DELEG_FLAG)) {
+	if(cksum->checksum.length < 28) {
+	    *minor_status = 0;
+	    return GSS_S_BAD_BINDINGS;
+	}
+    
+	DlgOpt = (p[0] << 0) | (p[1] << 8);
+	p += 2;
+	if (DlgOpt != 1) {
+	    *minor_status = 0;
+	    return GSS_S_BAD_BINDINGS;
+	}
+
+	fwd_data->length = (p[0] << 0) | (p[1] << 8);
+	p += 2;
+	if(cksum->checksum.length < 28 + fwd_data->length) {
+	    *minor_status = 0;
+	    return GSS_S_BAD_BINDINGS;
+	}
+	fwd_data->data = malloc(fwd_data->length);
+	if (fwd_data->data == NULL) {
+	    *minor_status = ENOMEM;
+	    return GSS_S_FAILURE;
+	}
+	memcpy(fwd_data->data, p, fwd_data->length);
+    }
+    
+    return GSS_S_COMPLETE;
+}