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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Common functions between firmware and kernel verified boot.
*/
#ifndef VBOOT_REFERENCE_VB2_COMMON_H_
#define VBOOT_REFERENCE_VB2_COMMON_H_
#include "2api.h"
#include "2common.h"
#include "2return_codes.h"
#include "2sha.h"
#include "2struct.h"
#include "vb2_struct.h"
/**
* Verify the integrity of a signature struct
* @param sig Signature struct
* @param size Size of buffer containing signature struct
* @return VB2_SUCCESS, or non-zero if error.
*/
int vb2_verify_signature2(const struct vb2_signature2 *sig,
uint32_t size);
/**
* Verify a signature against an expected hash digest.
*
* @param key Key to use in signature verification
* @param sig Signature to verify (may be destroyed in process)
* @param digest Digest of signed data
* @param wb Work buffer
* @return VB2_SUCCESS, or non-zero if error.
*/
int vb2_verify_digest2(const struct vb2_public_key *key,
struct vb2_signature2 *sig,
const uint8_t *digest,
const struct vb2_workbuf *wb);
/**
* Verify data matches signature.
*
* @param data Data to verify
* @param size Size of data buffer. Note that amount of data to
* actually validate is contained in sig->data_size.
* @param sig Signature of data (destroyed in process)
* @param key Key to use to validate signature
* @param wb Work buffer
* @return VB2_SUCCESS, or non-zero error code if error.
*/
int vb2_verify_data2(const void *data,
uint32_t size,
struct vb2_signature2 *sig,
const struct vb2_public_key *key,
const struct vb2_workbuf *wb);
/**
* Check the sanity of a key block using a public key.
*
* Header fields are also checked for sanity. Does not verify key index or key
* block flags. Signature inside block is destroyed during check.
*
* @param block Key block to verify
* @param size Size of key block buffer
* @param key Key to use to verify block
* @param wb Work buffer
* @return VB2_SUCCESS, or non-zero error code if error.
*/
int vb2_verify_keyblock2(struct vb2_keyblock2 *block,
uint32_t size,
const struct vb2_public_key *key,
const struct vb2_workbuf *wb);
/**
* Check the sanity of a firmware preamble using a public key.
*
* The signature in the preamble is destroyed during the check.
*
* @param preamble Preamble to verify
* @param size Size of preamble buffer
* @param key Key to use to verify preamble
* @param wb Work buffer
* @return VB2_SUCCESS, or non-zero error code if error.
*/
int vb2_verify_fw_preamble2(struct vb2_fw_preamble2 *preamble,
uint32_t size,
const struct vb2_public_key *key,
const struct vb2_workbuf *wb);
#endif /* VBOOT_REFERENCE_VB2_COMMON_H_ */
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