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/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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 "src/core/httpcli/httpcli_security_context.h"
#include <string.h>
#include "src/core/security/secure_transport_setup.h"
#include "src/core/support/string.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/tsi/ssl_transport_security.h"
typedef struct {
grpc_channel_security_context base;
tsi_ssl_handshaker_factory *handshaker_factory;
char *secure_peer_name;
} grpc_httpcli_ssl_channel_security_context;
static void httpcli_ssl_destroy(grpc_security_context *ctx) {
grpc_httpcli_ssl_channel_security_context *c =
(grpc_httpcli_ssl_channel_security_context *)ctx;
if (c->handshaker_factory != NULL) {
tsi_ssl_handshaker_factory_destroy(c->handshaker_factory);
}
if (c->secure_peer_name != NULL) gpr_free(c->secure_peer_name);
gpr_free(ctx);
}
static grpc_security_status httpcli_ssl_create_handshaker(
grpc_security_context *ctx, tsi_handshaker **handshaker) {
grpc_httpcli_ssl_channel_security_context *c =
(grpc_httpcli_ssl_channel_security_context *)ctx;
tsi_result result = TSI_OK;
if (c->handshaker_factory == NULL) return GRPC_SECURITY_ERROR;
result = tsi_ssl_handshaker_factory_create_handshaker(
c->handshaker_factory, c->secure_peer_name, handshaker);
if (result != TSI_OK) {
gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.",
tsi_result_to_string(result));
return GRPC_SECURITY_ERROR;
}
return GRPC_SECURITY_OK;
}
static grpc_security_status httpcli_ssl_check_peer(grpc_security_context *ctx,
tsi_peer peer,
grpc_security_check_cb cb,
void *user_data) {
grpc_httpcli_ssl_channel_security_context *c =
(grpc_httpcli_ssl_channel_security_context *)ctx;
grpc_security_status status = GRPC_SECURITY_OK;
/* Check the peer name. */
if (c->secure_peer_name != NULL &&
!tsi_ssl_peer_matches_name(&peer, c->secure_peer_name)) {
gpr_log(GPR_ERROR, "Peer name %s is not in peer certificate",
c->secure_peer_name);
status = GRPC_SECURITY_ERROR;
}
tsi_peer_destruct(&peer);
return status;
}
static grpc_security_context_vtable httpcli_ssl_vtable = {
httpcli_ssl_destroy, httpcli_ssl_create_handshaker, httpcli_ssl_check_peer};
grpc_security_status grpc_httpcli_ssl_channel_security_context_create(
const unsigned char *pem_root_certs, size_t pem_root_certs_size,
const char *secure_peer_name, grpc_channel_security_context **ctx) {
tsi_result result = TSI_OK;
grpc_httpcli_ssl_channel_security_context *c;
if (secure_peer_name != NULL && pem_root_certs == NULL) {
gpr_log(GPR_ERROR,
"Cannot assert a secure peer name without a trust root.");
return GRPC_SECURITY_ERROR;
}
c = gpr_malloc(sizeof(grpc_httpcli_ssl_channel_security_context));
memset(c, 0, sizeof(grpc_httpcli_ssl_channel_security_context));
gpr_ref_init(&c->base.base.refcount, 1);
c->base.base.is_client_side = 1;
c->base.base.vtable = &httpcli_ssl_vtable;
if (secure_peer_name != NULL) {
c->secure_peer_name = gpr_strdup(secure_peer_name);
}
result = tsi_create_ssl_client_handshaker_factory(
NULL, 0, NULL, 0, pem_root_certs, pem_root_certs_size, NULL, NULL, NULL,
0, &c->handshaker_factory);
if (result != TSI_OK) {
gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
tsi_result_to_string(result));
httpcli_ssl_destroy(&c->base.base);
*ctx = NULL;
return GRPC_SECURITY_ERROR;
}
*ctx = &c->base;
return GRPC_SECURITY_OK;
}
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