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ee5d09823f
Add support for P256 based hybrid encryption, and corresponding tests. Where hybrid encryption is: P256 based DH + AES128 + HMAC-SHA256. BRANCH=none BUG=chrome-os-partner:43025,chrome-os-partner:47524 CQ-DEPEND=CL:336091,CL:339561 TEST=ECIES tests in test/tpm/tpmtest.py pass Change-Id: Ie091e278df72185a6896af0e498925e56404f87e Signed-off-by: nagendra modadugu <ngm@google.com> Reviewed-on: https://chromium-review.googlesource.com/337340 Commit-Ready: Nagendra Modadugu <ngm@google.com> Tested-by: Nagendra Modadugu <ngm@google.com> Reviewed-by: Marius Schilder <mschilder@chromium.org>
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef __EC_INCLUDE_EXTENSION_H
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#define __EC_INCLUDE_EXTENSION_H
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#include <stddef.h>
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#include <stdint.h>
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#include "common.h"
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/*
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* Type of function handling extension commands.
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*
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* @param buffer As input points to the input data to be processed, as
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* output stores data, processing result.
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* @param command_size Number of bytes of input data
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* @param response_size On input - max size of the buffer, on output - actual
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* number of data returned by the handler.
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*/
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typedef void (*extension_handler)(void *buffer,
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size_t command_size,
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size_t *response_size);
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/*
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* Find handler for an extension command.
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*
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* @param command_code Code associated with a extension command handler.
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* @param buffer Data to be processd by the handler, the same space
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* is used for data returned by the handler.
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* @command_size Size of the input data.
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* @param size On input - max size of the buffer, on output - actual number of
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* data returned by the handler. A single byte return
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* usually indicates an error and contains the error code.
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*/
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void extension_route_command(uint16_t command_code,
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void *buffer,
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size_t command_size,
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size_t *size);
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struct extension_command {
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uint16_t command_code;
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extension_handler handler;
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} __packed;
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/* Values for different extension subcommands. */
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enum {
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EXTENSION_AES = 0,
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EXTENSION_HASH = 1,
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EXTENSION_RSA = 2,
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EXTENSION_EC = 3,
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EXTENSION_FW_UPGRADE = 4,
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EXTENSION_HKDF = 5,
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EXTENSION_ECIES = 6,
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};
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/* Error codes reported by extension commands. */
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enum {
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/* EXTENSION_HASH error codes */
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/* Attempt to start a session on an active handle. */
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EXC_HASH_DUPLICATED_HANDLE = 1,
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EXC_HASH_TOO_MANY_HANDLES = 2, /* No room to allocate a new context. */
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/* Continuation/finish on unknown context. */
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EXC_HASH_UNKNOWN_CONTEXT = 3
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};
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#define DECLARE_EXTENSION_COMMAND(code, handler) \
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const struct extension_command __keep __extension_cmd_##code \
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__attribute__((section(".rodata.extensioncmds"))) \
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= {code, handler}
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#endif /* __EC_INCLUDE_EXTENSION_H */
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