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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.
*
* Host-side functions for verified boot key structures
*/
#ifndef VBOOT_REFERENCE_HOST_SIGNATURE2_H_
#define VBOOT_REFERENCE_HOST_SIGNATURE2_H_
#include "2struct.h"
struct vb2_private_key;
struct vb21_signature;
/**
* Get the digest info for a hash algorithm
*
* @param hash_alg Hash algorithm
* @param buf_ptr On success, points to the digest info
* @param size_ptr On success, contains the info size in bytes
* @return VB2_SUCCESS, or non-zero error code on failure.
*/
vb2_error_t vb2_digest_info(enum vb2_hash_algorithm hash_alg,
const uint8_t **buf_ptr, uint32_t *size_ptr);
/**
* Sign data buffer
*
* @param sig_ptr On success, points to a newly allocated signature.
* Caller is responsible for calling free() on this.
* @param data Pointer to data to sign
* @param size Size of data to sign in bytes
* @param key Private key to use to sign data
* @param desc Optional description for signature. If NULL, the
* key description will be used.
* @return VB2_SUCCESS, or non-zero error code on failure.
*/
vb2_error_t vb21_sign_data(struct vb21_signature **sig_ptr, const uint8_t *data,
uint32_t size, const struct vb2_private_key *key,
const char *desc);
/**
* Calculate the signature size for a private key.
*
* @param size_ptr On success, contains the signature size in bytes.
* @param key Key to calculate signature length from.
* @param desc Optional description for signature. If NULL, the
* key description will be used.
* @return VB2_SUCCESS, or non-zero error code on failure.
*/
vb2_error_t vb21_sig_size_for_key(uint32_t *size_ptr,
const struct vb2_private_key *key,
const char *desc);
/**
* Calculate the total signature size for a list of keys.
*
* @param size_ptr On success, contains the signature size in bytes.
* @param key_list List of keys to calculate signature length from.
* @param key_count Number of keys.
* @return VB2_SUCCESS, or non-zero error code on failure.
*/
vb2_error_t vb21_sig_size_for_keys(uint32_t *size_ptr,
const struct vb2_private_key **key_list,
uint32_t key_count);
/**
* Sign object with a key.
*
* @param buf Buffer containing object to sign, starting with
* common header
* @param sig_offset Offset in buffer at which to store signature. All
* data before this in the buffer will be signed.
* @param key Key to sign object with
* @param desc If non-null, description to use for signature
*/
vb2_error_t vb21_sign_object(uint8_t *buf, uint32_t sig_offset,
const struct vb2_private_key *key,
const char *desc);
/**
* Sign object with list of keys.
*
* @param buf Buffer containing object to sign, starting with
* common header
* @param sig_offset Offset to start signatures. All data before this
* in the buffer will be signed.
* @param key_list List of keys to sign object with
* @param key_count Number of keys in list
*/
vb2_error_t vb21_sign_object_multiple(uint8_t *buf, uint32_t sig_offset,
const struct vb2_private_key **key_list,
uint32_t key_count);
#endif /* VBOOT_REFERENCE_HOST_SIGNATURE2_H_ */
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