#include <grpc/support/port_platform.h>
#include "src/core/tsi/alts/zero_copy_frame_protector/alts_iovec_record_protocol.h"
#include <stdlib.h>
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include "src/core/tsi/alts/frame_protector/alts_counter.h"

Include dependency graph for alts_iovec_record_protocol.cc:

Classes
struct	alts_iovec_record_protocol

Functions
grpc_status_code	alts_iovec_record_protocol_create (gsec_aead_crypter crypter, size_t overflow_size, bool is_client, bool is_integrity_only, bool is_protect, alts_iovec_record_protocol rp, char *error_details)

void	alts_iovec_record_protocol_destroy (alts_iovec_record_protocol *rp)

size_t	alts_iovec_record_protocol_get_header_length ()

size_t	alts_iovec_record_protocol_get_tag_length (const alts_iovec_record_protocol *rp)

grpc_status_code	alts_iovec_record_protocol_integrity_only_protect (alts_iovec_record_protocol rp, const iovec_t unprotected_vec, size_t unprotected_vec_length, iovec_t header, iovec_t tag, char **error_details)

grpc_status_code	alts_iovec_record_protocol_integrity_only_unprotect (alts_iovec_record_protocol rp, const iovec_t protected_vec, size_t protected_vec_length, iovec_t header, iovec_t tag, char **error_details)

size_t	alts_iovec_record_protocol_max_unprotected_data_size (const alts_iovec_record_protocol *rp, size_t max_protected_frame_size)

grpc_status_code	alts_iovec_record_protocol_privacy_integrity_protect (alts_iovec_record_protocol rp, const iovec_t unprotected_vec, size_t unprotected_vec_length, iovec_t protected_frame, char **error_details)

grpc_status_code	alts_iovec_record_protocol_privacy_integrity_unprotect (alts_iovec_record_protocol rp, iovec_t header, const iovec_t protected_vec, size_t protected_vec_length, iovec_t unprotected_data, char **error_details)

static grpc_status_code	ensure_header_and_tag_length (const alts_iovec_record_protocol rp, iovec_t header, iovec_t tag, char *error_details)

static size_t	get_total_length (const iovec_t *vec, size_t vec_length)

static grpc_status_code	increment_counter (alts_counter counter, char *error_details)

static uint32_t	load_32_le (const unsigned char *buffer)

static void	maybe_append_error_msg (const char appendix, char *dst)

static void	maybe_copy_error_msg (const char src, char *dst)

static void	store_32_le (uint32_t value, unsigned char *buffer)

static grpc_status_code	verify_frame_header (size_t data_length, unsigned char header, char *error_details)

static grpc_status_code	write_frame_header (size_t data_length, unsigned char header, char *error_details)

Function Documentation

◆ alts_iovec_record_protocol_create()

grpc_status_code alts_iovec_record_protocol_create	(	gsec_aead_crypter *	crypter,
		size_t	overflow_size,
		bool	is_client,
		bool	is_integrity_only,
		bool	is_protect,
		alts_iovec_record_protocol **	rp,
		char **	error_details
	)

This method creates an alts_iovec_record_protocol instance, given a gsec_aead_crypter instance, a flag indicating if the created instance will be used at the client or server side, and a flag indicating if the created instance will be used for integrity-only mode or privacy-integrity mode. The ownership of gsec_aead_crypter instance is transferred to this new object.

crypter: a gsec_aead_crypter instance used to perform AEAD decryption.
overflow_size: overflow size of counter in bytes.
is_client: a flag indicating if the alts_iovec_record_protocol instance will be used at the client or server side.
is_integrity_only: a flag indicating if the alts_iovec_record_protocol instance will be used for integrity-only or privacy-integrity mode.
is_protect: a flag indicating if the alts_grpc_record_protocol instance will be used for protect or unprotect.
rp: an alts_iovec_record_protocol instance to be returned from the method.
error_details: a buffer containing an error message if the method does not function correctly. It is OK to pass nullptr into error_details.

On success, the method returns GRPC_STATUS_OK. Otherwise, it returns an error status code along with its details specified in error_details (if error_details is not nullptr).

Definition at line 429 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_destroy()

void alts_iovec_record_protocol_destroy ( alts_iovec_record_protocol * rp )

This method destroys an alts_iovec_record_protocol instance by de-allocating all of its occupied memory. A gsec_aead_crypter instance passed in at gsec_alts_crypter instance creation time will be destroyed in this method.

Definition at line 472 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_get_header_length()

size_t alts_iovec_record_protocol_get_header_length ( )

This method gets the length of record protocol frame header.

Definition at line 165 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_get_tag_length()

size_t alts_iovec_record_protocol_get_tag_length ( const alts_iovec_record_protocol * rp )

This method gets the length of record protocol frame tag.

rp: an alts_iovec_record_protocol instance.

On success, the method returns the length of record protocol frame tag. Otherwise, it returns zero.

Definition at line 169 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_integrity_only_protect()

grpc_status_code alts_iovec_record_protocol_integrity_only_protect	(	alts_iovec_record_protocol *	rp,
		const iovec_t *	unprotected_vec,
		size_t	unprotected_vec_length,
		iovec_t	header,
		iovec_t	tag,
		char **	error_details
	)

This method performs integrity-only protect operation on a alts_iovec_record_protocol instance, i.e., compute frame header and tag. The caller needs to allocate the memory for header and tag prior to calling this method.

rp: an alts_iovec_record_protocol instance.
unprotected_vec: an iovec array containing unprotected data.
unprotected_vec_length: the array length of unprotected_vec.
header: an iovec containing the output frame header.
tag: an iovec containing the output frame tag.
error_details: a buffer containing an error message if the method does not function correctly. It is OK to pass nullptr into error_details.

On success, the method returns GRPC_STATUS_OK. Otherwise, it returns an error status code along with its details specified in error_details (if error_details is not nullptr).

Definition at line 188 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_integrity_only_unprotect()

grpc_status_code alts_iovec_record_protocol_integrity_only_unprotect	(	alts_iovec_record_protocol *	rp,
		const iovec_t *	protected_vec,
		size_t	protected_vec_length,
		iovec_t	header,
		iovec_t	tag,
		char **	error_details
	)

This method performs integrity-only unprotect operation on a alts_iovec_record_protocol instance, i.e., verify frame header and tag.

rp: an alts_iovec_record_protocol instance.
protected_vec: an iovec array containing protected data.
protected_vec_length: the array length of protected_vec.
header: an iovec containing the frame header.
tag: an iovec containing the frame tag.
error_details: a buffer containing an error message if the method does not function correctly. It is OK to pass nullptr into error_details.

On success, the method returns GRPC_STATUS_OK. Otherwise, it returns an error status code along with its details specified in error_details (if error_details is not nullptr).

Definition at line 243 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_max_unprotected_data_size()

size_t alts_iovec_record_protocol_max_unprotected_data_size	(	const alts_iovec_record_protocol *	rp,
		size_t	max_protected_frame_size
	)

This method returns maximum allowed unprotected data size, given maximum protected frame size.

rp: an alts_iovec_record_protocol instance.
max_protected_frame_size: maximum protected frame size.

On success, the method returns the maximum allowed unprotected data size. Otherwise, it returns zero.

Definition at line 177 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_privacy_integrity_protect()

grpc_status_code alts_iovec_record_protocol_privacy_integrity_protect	(	alts_iovec_record_protocol *	rp,
		const iovec_t *	unprotected_vec,
		size_t	unprotected_vec_length,
		iovec_t	protected_frame,
		char **	error_details
	)

This method performs privacy-integrity protect operation on a alts_iovec_record_protocol instance, i.e., compute a protected frame. The caller needs to allocate the memory for the protected frame prior to calling this method.

rp: an alts_iovec_record_protocol instance.
unprotected_vec: an iovec array containing unprotected data.
unprotected_vec_length: the array length of unprotected_vec.
protected_frame: an iovec containing the output protected frame.
error_details: a buffer containing an error message if the method does not function correctly. It is OK to pass nullptr into error_details.

On success, the method returns GRPC_STATUS_OK. Otherwise, it returns an error status code along with its details specified in error_details (if error_details is not nullptr).

Definition at line 291 of file alts_iovec_record_protocol.cc.

◆ alts_iovec_record_protocol_privacy_integrity_unprotect()

grpc_status_code alts_iovec_record_protocol_privacy_integrity_unprotect	(	alts_iovec_record_protocol *	rp,
		iovec_t	header,
		const iovec_t *	protected_vec,
		size_t	protected_vec_length,
		iovec_t	unprotected_data,
		char **	error_details
	)

This method performs privacy-integrity unprotect operation on a alts_iovec_record_protocol instance given a full protected frame, i.e., compute the unprotected data. The caller needs to allocated the memory for the unprotected data prior to calling this method.

rp: an alts_iovec_record_protocol instance.
header: an iovec containing the frame header.
protected_vec: an iovec array containing protected data including the tag.
protected_vec_length: the array length of protected_vec.
unprotected_data: an iovec containing the output unprotected data.
error_details: a buffer containing an error message if the method does not function correctly. It is OK to pass nullptr into error_details.

On success, the method returns GRPC_STATUS_OK. Otherwise, it returns an error status code along with its details specified in error_details (if error_details is not nullptr).

Definition at line 357 of file alts_iovec_record_protocol.cc.