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/*
*
* Copyright 2015, 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.
*
*/
#ifndef GRPC_CORE_TSI_TRANSPORT_SECURITY_H
#define GRPC_CORE_TSI_TRANSPORT_SECURITY_H
#include <stdbool.h>
#include "src/core/lib/debug/trace.h"
#include "src/core/tsi/transport_security_interface.h"
#ifdef __cplusplus
extern "C" {
#endif
extern grpc_tracer_flag tsi_tracing_enabled;
/* Base for tsi_frame_protector implementations.
See transport_security_interface.h for documentation. */
typedef struct {
tsi_result (*protect)(tsi_frame_protector *self,
const unsigned char *unprotected_bytes,
size_t *unprotected_bytes_size,
unsigned char *protected_output_frames,
size_t *protected_output_frames_size);
tsi_result (*protect_flush)(tsi_frame_protector *self,
unsigned char *protected_output_frames,
size_t *protected_output_frames_size,
size_t *still_pending_size);
tsi_result (*unprotect)(tsi_frame_protector *self,
const unsigned char *protected_frames_bytes,
size_t *protected_frames_bytes_size,
unsigned char *unprotected_bytes,
size_t *unprotected_bytes_size);
void (*destroy)(tsi_frame_protector *self);
} tsi_frame_protector_vtable;
struct tsi_frame_protector {
const tsi_frame_protector_vtable *vtable;
};
/* Base for tsi_handshaker implementations.
See transport_security_interface.h for documentation. */
typedef struct {
tsi_result (*get_bytes_to_send_to_peer)(tsi_handshaker *self,
unsigned char *bytes,
size_t *bytes_size);
tsi_result (*process_bytes_from_peer)(tsi_handshaker *self,
const unsigned char *bytes,
size_t *bytes_size);
tsi_result (*get_result)(tsi_handshaker *self);
tsi_result (*extract_peer)(tsi_handshaker *self, tsi_peer *peer);
tsi_result (*create_frame_protector)(tsi_handshaker *self,
size_t *max_protected_frame_size,
tsi_frame_protector **protector);
void (*destroy)(tsi_handshaker *self);
tsi_result (*next)(tsi_handshaker *self, const unsigned char *received_bytes,
size_t received_bytes_size, unsigned char **bytes_to_send,
size_t *bytes_to_send_size,
tsi_handshaker_result **handshaker_result,
tsi_handshaker_on_next_done_cb cb, void *user_data);
} tsi_handshaker_vtable;
struct tsi_handshaker {
const tsi_handshaker_vtable *vtable;
bool frame_protector_created;
bool handshaker_result_created;
};
/* Base for tsi_handshaker_result implementations.
See transport_security_interface.h for documentation. */
typedef struct {
tsi_result (*extract_peer)(const tsi_handshaker_result *self, tsi_peer *peer);
tsi_result (*create_frame_protector)(const tsi_handshaker_result *self,
size_t *max_output_protected_frame_size,
tsi_frame_protector **protector);
tsi_result (*get_unused_bytes)(const tsi_handshaker_result *self,
unsigned char **bytes, size_t *bytes_size);
void (*destroy)(tsi_handshaker_result *self);
} tsi_handshaker_result_vtable;
struct tsi_handshaker_result {
const tsi_handshaker_result_vtable *vtable;
};
/* Peer and property construction/destruction functions. */
tsi_result tsi_construct_peer(size_t property_count, tsi_peer *peer);
tsi_peer_property tsi_init_peer_property(void);
void tsi_peer_property_destruct(tsi_peer_property *property);
tsi_result tsi_construct_string_peer_property(const char *name,
const char *value,
size_t value_length,
tsi_peer_property *property);
tsi_result tsi_construct_allocated_string_peer_property(
const char *name, size_t value_length, tsi_peer_property *property);
tsi_result tsi_construct_string_peer_property_from_cstring(
const char *name, const char *value, tsi_peer_property *property);
/* Utils. */
char *tsi_strdup(const char *src); /* Sadly, no strdup in C89. */
#ifdef __cplusplus
}
#endif
#endif /* GRPC_CORE_TSI_TRANSPORT_SECURITY_H */
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