r19604: This is a massive commit, and I appologise in advance for it's size.

This merges Samba4 with lorikeet-heimdal, which itself has been
tracking Heimdal CVS for the past couple of weeks.

This is such a big change because Heimdal reorganised it's internal
structures, with the mechglue merge, and because many of our 'wishes' have been granted:  we now have DCE_STYLE GSSAPI, send_to_kdc hooks and many other features merged into the mainline code.  We have adapted to upstream's choice of API in these cases.

In gensec_gssapi and gensec_krb5, we either expect a valid PAC, or NO
PAC.  This matches windows behavour.  We also have an option to
require the PAC to be present (which allows us to automate the testing
of this code).

This also includes a restructure of how the kerberos dependencies are
handled, due to the fallout of the merge.

Andrew Bartlett
(This used to be commit 4826f1735197c2a471d771495e6d4c1051b4c471)

1 files changed, 559 insertions, 0 deletions

diff --git a/source4/heimdal/lib/gssapi/krb5/inquire_sec_context_by_oid.c b/source4/heimdal/lib/gssapi/krb5/inquire_sec_context_by_oid.c
new file mode 100644
index 0000000000..0b46cc5495
--- /dev/null
+++ b/source4/heimdal/lib/gssapi/krb5/inquire_sec_context_by_oid.c
@@ -0,0 +1,559 @@
+/*
+ * Copyright (c) 2004, PADL Software Pty Ltd.
+ * 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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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/gsskrb5_locl.h"
+
+RCSID("$Id: inquire_sec_context_by_oid.c,v 1.8 2006/10/24 15:55:28 lha Exp $");
+
+static int
+oid_prefix_equal(gss_OID oid_enc, gss_OID prefix_enc, unsigned *suffix)
+{
+    int ret;
+    heim_oid oid;
+    heim_oid prefix;
+ 
+    *suffix = 0;
+
+    ret = der_get_oid(oid_enc->elements, oid_enc->length,
+		      &oid, NULL);
+    if (ret) {
+	return 0;
+    }
+
+    ret = der_get_oid(prefix_enc->elements, prefix_enc->length,
+		      &prefix, NULL);
+    if (ret) {
+	der_free_oid(&oid);
+	return 0;
+    }
+
+    ret = 0;
+
+    if (oid.length - 1 == prefix.length) {
+	*suffix = oid.components[oid.length - 1];
+	oid.length--;
+	ret = (der_heim_oid_cmp(&oid, &prefix) == 0);
+	oid.length++;
+    }
+
+    der_free_oid(&oid);
+    der_free_oid(&prefix);
+
+    return ret;
+}
+
+static OM_uint32 inquire_sec_context_tkt_flags
+           (OM_uint32 *minor_status,
+            const gsskrb5_ctx context_handle,
+            gss_buffer_set_t *data_set)
+{
+    OM_uint32 tkt_flags;
+    unsigned char buf[4];
+    gss_buffer_desc value;
+
+    HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+
+    if (context_handle->ticket == NULL) {
+	HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+	_gsskrb5_set_status("No ticket from which to obtain flags");
+	*minor_status = EINVAL;
+	return GSS_S_BAD_MECH;
+    }
+
+    tkt_flags = TicketFlags2int(context_handle->ticket->ticket.flags);
+    HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+
+    _gsskrb5_encode_om_uint32(tkt_flags, buf);
+    value.length = sizeof(buf);
+    value.value = buf;
+
+    return gss_add_buffer_set_member(minor_status,
+				     &value,
+				     data_set);
+}
+
+enum keytype { ACCEPTOR_KEY, INITIATOR_KEY, TOKEN_KEY };
+
+static OM_uint32 inquire_sec_context_get_subkey
+           (OM_uint32 *minor_status,
+            const gsskrb5_ctx context_handle,
+	    enum keytype keytype,
+            gss_buffer_set_t *data_set)
+{
+    krb5_keyblock *key = NULL;
+    krb5_storage *sp = NULL;
+    krb5_data data;
+    OM_uint32 maj_stat = GSS_S_COMPLETE;
+    krb5_error_code ret;
+
+    krb5_data_zero(&data);
+
+    sp = krb5_storage_emem();
+    if (sp == NULL) {
+	_gsskrb5_clear_status();
+	ret = ENOMEM;
+	goto out;
+    }
+
+    HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+    switch(keytype) {
+    case ACCEPTOR_KEY:
+	ret = _gsskrb5i_get_acceptor_subkey(context_handle, &key);
+	if (ret)
+	    _gsskrb5_set_error_string ();
+	break;
+    case INITIATOR_KEY:
+	ret = _gsskrb5i_get_initiator_subkey(context_handle, &key);
+	if (ret)
+	    _gsskrb5_set_error_string ();
+	break;
+    case TOKEN_KEY:
+	ret = _gsskrb5i_get_token_key(context_handle, &key);
+	if (ret)
+	    _gsskrb5_set_error_string ();
+	break;
+    default:
+	_gsskrb5_set_status("%d is not a valid subkey type", keytype);
+	ret = EINVAL;
+	break;
+   }
+    HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+    if (ret) 
+	goto out;
+
+    ret = krb5_store_keyblock(sp, *key);
+    krb5_free_keyblock (_gsskrb5_context, key);
+    if (ret) {
+	_gsskrb5_set_error_string ();
+	goto out;
+    }
+
+    ret = krb5_storage_to_data(sp, &data);
+    if (ret) {
+	_gsskrb5_set_error_string ();
+	goto out;
+    }
+
+    {
+	gss_buffer_desc value;
+	
+	value.length = data.length;
+	value.value = data.data;
+	
+	maj_stat = gss_add_buffer_set_member(minor_status,
+					     &value,
+					     data_set);
+    }
+
+out:
+    krb5_data_free(&data);
+    if (sp)
+	krb5_storage_free(sp);
+    if (ret) {
+	*minor_status = ret;
+	maj_stat = GSS_S_FAILURE;
+    }
+    return maj_stat;
+}
+
+static OM_uint32 inquire_sec_context_authz_data
+           (OM_uint32 *minor_status,
+            const gsskrb5_ctx context_handle,
+            unsigned ad_type,
+            gss_buffer_set_t *data_set)
+{
+    krb5_data data;
+    gss_buffer_desc ad_data;
+    OM_uint32 ret;
+
+    *minor_status = 0;
+    *data_set = GSS_C_NO_BUFFER_SET;
+
+    HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+    if (context_handle->ticket == NULL) {
+	HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+	*minor_status = EINVAL;
+	_gsskrb5_set_status("No ticket to obtain authz data from");
+	return GSS_S_NO_CONTEXT;
+    }
+
+    ret = krb5_ticket_get_authorization_data_type(_gsskrb5_context,
+						  context_handle->ticket,
+						  ad_type,
+						  &data);
+    HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+    if (ret) {
+	_gsskrb5_set_error_string ();
+	*minor_status = ret;
+	return GSS_S_FAILURE;
+    }
+
+    ad_data.value = data.data;
+    ad_data.length = data.length;
+
+    ret = gss_add_buffer_set_member(minor_status,
+				    &ad_data,
+				    data_set);
+
+    krb5_data_free(&data);
+
+    return ret;
+}
+
+static OM_uint32 inquire_sec_context_has_updated_spnego
+           (OM_uint32 *minor_status,
+            const gsskrb5_ctx context_handle,
+            gss_buffer_set_t *data_set)
+{
+    int is_updated = 0;
+
+    *minor_status = 0;
+    *data_set = GSS_C_NO_BUFFER_SET;
+
+    /*
+     * For Windows SPNEGO implementations, both the initiator and the
+     * acceptor are assumed to have been updated if a "newer" [CLAR] or
+     * different enctype is negotiated for use by the Kerberos GSS-API
+     * mechanism.
+     */
+    HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+    _gsskrb5i_is_cfx(context_handle, &is_updated);
+    if (is_updated == 0) {
+	krb5_keyblock *acceptor_subkey;
+
+	if (context_handle->more_flags & LOCAL)
+	    acceptor_subkey = context_handle->auth_context->remote_subkey;
+	else
+	    acceptor_subkey = context_handle->auth_context->local_subkey;
+
+	if (acceptor_subkey != NULL)
+	    is_updated = (acceptor_subkey->keytype !=
+			  context_handle->auth_context->keyblock->keytype);
+    }
+    HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+
+    return is_updated ? GSS_S_COMPLETE : GSS_S_FAILURE;
+}
+
+/*
+ *
+ */
+
+static OM_uint32
+export_lucid_sec_context_v1(OM_uint32 *minor_status,
+			    gsskrb5_ctx context_handle,
+			    gss_buffer_set_t *data_set)
+{
+    krb5_storage *sp = NULL;
+    OM_uint32 major_status = GSS_S_COMPLETE;
+    krb5_error_code ret;
+    krb5_keyblock *key = NULL;
+    int32_t number;
+    int is_cfx;
+    krb5_data data;
+    
+    *minor_status = 0;
+
+    GSSAPI_KRB5_INIT ();
+
+    HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
+
+    _gsskrb5i_is_cfx(context_handle, &is_cfx);
+
+    sp = krb5_storage_emem();
+    if (sp == NULL) {
+	_gsskrb5_clear_status();
+	ret = ENOMEM;
+	goto out;
+    }
+
+    ret = krb5_store_int32(sp, 1);
+    if (ret) goto out;
+    ret = krb5_store_int32(sp, (context_handle->more_flags & LOCAL) ? 1 : 0);
+    if (ret) goto out;
+    ret = krb5_store_int32(sp, context_handle->lifetime);
+    if (ret) goto out;
+    krb5_auth_con_getlocalseqnumber (_gsskrb5_context,
+				     context_handle->auth_context,
+				     &number);
+    ret = krb5_store_uint32(sp, (uint32_t)0); /* store top half as zero */
+    ret = krb5_store_uint32(sp, (uint32_t)number);
+    krb5_auth_getremoteseqnumber (_gsskrb5_context,
+				  context_handle->auth_context,
+				  &number);
+    ret = krb5_store_uint32(sp, (uint32_t)0); /* store top half as zero */
+    ret = krb5_store_uint32(sp, (uint32_t)number);
+    ret = krb5_store_int32(sp, (is_cfx) ? 1 : 0);
+    if (ret) goto out;
+
+    ret = _gsskrb5i_get_token_key(context_handle, &key);
+    if (ret) goto out;
+
+    if (is_cfx == 0) {
+	int sign_alg, seal_alg;
+
+	switch (key->keytype) {
+	case ETYPE_DES_CBC_CRC:
+	case ETYPE_DES_CBC_MD4:
+	case ETYPE_DES_CBC_MD5:
+	    sign_alg = 0;
+	    seal_alg = 0;
+	    break;
+	case ETYPE_DES3_CBC_MD5:
+	case ETYPE_DES3_CBC_SHA1:
+	    sign_alg = 4;
+	    seal_alg = 2;
+	    break;
+	case ETYPE_ARCFOUR_HMAC_MD5:
+	case ETYPE_ARCFOUR_HMAC_MD5_56:
+	    sign_alg = 17;
+	    seal_alg = 16;
+	    break;
+	default:
+	    sign_alg = -1;
+	    seal_alg = -1;
+	    break;
+	}
+	ret = krb5_store_int32(sp, sign_alg);
+	if (ret) goto out;
+	ret = krb5_store_int32(sp, seal_alg);
+	if (ret) goto out;
+	/* ctx_key */
+	ret = krb5_store_keyblock(sp, *key);
+	if (ret) goto out;
+    } else {
+	int subkey_p = (context_handle->more_flags & ACCEPTOR_SUBKEY) ? 1 : 0;
+
+	/* have_acceptor_subkey */
+	ret = krb5_store_int32(sp, subkey_p);
+	if (ret) goto out;
+	/* ctx_key */
+	ret = krb5_store_keyblock(sp, *key);
+	if (ret) goto out;
+	/* acceptor_subkey */
+	if (subkey_p) {
+	    ret = krb5_store_keyblock(sp, *key);
+	    if (ret) goto out;
+	}
+    }
+    ret = krb5_storage_to_data(sp, &data);
+    if (ret) goto out;
+
+    {
+	gss_buffer_desc ad_data;
+
+	ad_data.value = data.data;
+	ad_data.length = data.length;
+
+	ret = gss_add_buffer_set_member(minor_status, &ad_data, data_set);
+	krb5_data_free(&data);
+	if (ret)
+	    goto out;
+    }
+
+out:
+    if (key)
+	krb5_free_keyblock (_gsskrb5_context, key);
+    if (sp)
+	krb5_storage_free(sp);
+    if (ret) {
+	*minor_status = ret;
+	major_status = GSS_S_FAILURE;
+    }
+    HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
+    return major_status;
+}
+
+static OM_uint32
+get_authtime(OM_uint32 *minor_status,
+	     gsskrb5_ctx ctx, 
+	     gss_buffer_set_t *data_set)
+
+{
+    gss_buffer_desc value;
+    OM_uint32 authtime;
+
+    HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
+    if (ctx->ticket == NULL) {
+	HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
+	_gsskrb5_set_status("No ticket to obtain auth time from");
+	*minor_status = EINVAL;
+	return GSS_S_FAILURE;
+    }
+    
+    authtime = ctx->ticket->ticket.authtime;
+    
+    HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
+
+    value.length = 4;
+    value.value = malloc(value.length);
+    if (!value.value) {
+	_gsskrb5_clear_status();
+	*minor_status = ENOMEM;
+	return GSS_S_FAILURE;
+    }
+    _gsskrb5_encode_om_uint32(authtime, value.value);
+
+    return gss_add_buffer_set_member(minor_status,
+				     &value,
+				     data_set);
+}
+
+
+static OM_uint32 
+get_service_keyblock
+        (OM_uint32 *minor_status,
+	 gsskrb5_ctx ctx, 
+	 gss_buffer_set_t *data_set)
+{
+    krb5_storage *sp = NULL;
+    krb5_data data;
+    OM_uint32 maj_stat = GSS_S_COMPLETE;
+    krb5_error_code ret = EINVAL;
+    
+    sp = krb5_storage_emem();
+    if (sp == NULL) {
+	_gsskrb5_clear_status();
+	*minor_status = ENOMEM;
+	return GSS_S_FAILURE;
+    }
+
+    HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
+    if (ctx->service_keyblock == NULL) {
+	HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
+	_gsskrb5_set_status("No service keyblock on gssapi context");
+	*minor_status = EINVAL;
+	return GSS_S_FAILURE; 
+    }
+
+    krb5_data_zero(&data);
+
+    ret = krb5_store_keyblock(sp, *ctx->service_keyblock);
+
+    HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
+
+    if (ret)
+	goto out;
+
+    ret = krb5_storage_to_data(sp, &data);
+    if (ret)
+	goto out;
+
+    {
+	gss_buffer_desc value;
+	
+	value.length = data.length;
+	value.value = data.data;
+	
+	maj_stat = gss_add_buffer_set_member(minor_status,
+					     &value,
+					     data_set);
+    }
+
+out:
+    krb5_data_free(&data);
+    if (sp)
+	krb5_storage_free(sp);
+    if (ret) {
+	_gsskrb5_set_error_string ();
+	*minor_status = ret;
+	maj_stat = GSS_S_FAILURE;
+    }
+    return maj_stat;
+}
+/*
+ *
+ */
+
+OM_uint32 _gsskrb5_inquire_sec_context_by_oid
+           (OM_uint32 *minor_status,
+            const gss_ctx_id_t context_handle,
+            const gss_OID desired_object,
+            gss_buffer_set_t *data_set)
+{
+    const gsskrb5_ctx ctx = (const gsskrb5_ctx) context_handle;
+    unsigned suffix;
+
+    if (ctx == NULL) {
+	*minor_status = EINVAL;
+	return GSS_S_NO_CONTEXT;
+    }
+
+    if (gss_oid_equal(desired_object, GSS_KRB5_GET_TKT_FLAGS_X)) {
+	return inquire_sec_context_tkt_flags(minor_status,
+					     ctx,
+					     data_set);
+    } else if (gss_oid_equal(desired_object, GSS_C_PEER_HAS_UPDATED_SPNEGO)) {
+	return inquire_sec_context_has_updated_spnego(minor_status,
+						      ctx,
+						      data_set);
+    } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_SUBKEY_X)) {
+	return inquire_sec_context_get_subkey(minor_status,
+					      ctx,
+					      TOKEN_KEY,
+					      data_set);
+    } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_INITIATOR_SUBKEY_X)) {
+	return inquire_sec_context_get_subkey(minor_status,
+					      ctx,
+					      INITIATOR_KEY,
+					      data_set);
+    } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_ACCEPTOR_SUBKEY_X)) {
+	return inquire_sec_context_get_subkey(minor_status,
+					      ctx,
+					      ACCEPTOR_KEY,
+					      data_set);
+    } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_AUTHTIME_X)) {
+	return get_authtime(minor_status, ctx, data_set);
+    } else if (oid_prefix_equal(desired_object,
+				GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X,
+				&suffix)) {
+	return inquire_sec_context_authz_data(minor_status,
+					      ctx,
+					      suffix,
+					      data_set);
+    } else if (oid_prefix_equal(desired_object,
+				GSS_KRB5_EXPORT_LUCID_CONTEXT_X,
+				&suffix)) {
+	if (suffix == 1)
+	    return export_lucid_sec_context_v1(minor_status,
+					       ctx,
+					       data_set);
+	*minor_status = 0;
+	return GSS_S_FAILURE;
+    } else if (gss_oid_equal(desired_object, GSS_KRB5_GET_SERVICE_KEYBLOCK_X)) {
+	return get_service_keyblock(minor_status, ctx, data_set);
+    } else {
+	*minor_status = 0;
+	return GSS_S_FAILURE;
+    }
+}
+