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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 misc functions for verified boot.
*/
#ifndef VBOOT_REFERENCE_UTIL_MISC_H_
#define VBOOT_REFERENCE_UTIL_MISC_H_
#include "host_key.h"
#include "vboot_struct.h"
struct rsa_st;
struct vb2_packed_key;
struct vb2_private_key;
/**
* Returns the SHA1 digest of the packed key data as a string.
*
* The returned string is a global static buffer, so each call to this
* overwrites the previous digest string. So don't call this more than once
* per printf().
*
* @param key Key to print digest for
*
* @return A string containing the SHA1 digest.
*/
const char *packed_key_sha1_string(const struct vb2_packed_key *key);
/**
* Returns the SHA1 digest of the private key data as a string.
*
* The returned string is a global static buffer, so each call to this
* overwrites the previous digest string. So don't call this more than once
* per printf().
*
* @param key Key to print digest for
*
* @return A string containing the SHA1 digest.
*/
const char *private_key_sha1_string(const struct vb2_private_key *key);
/*
* Our packed RSBPublicKey buffer (historically in files ending with ".keyb",
* but also the part of VbPublicKey and struct vb21_packed_key that is
* referenced by .key_offset) has this binary format:
*
* struct {
* uint32_t nwords; // size of RSA key in 32-bit words
* uint32_t N0inv; // -1 / N[0] mod 2^32
* uint32_t modulus[nwords]; // modulus as a little endian array
* uint32_t R2[nwords]; // R^2 as little endian array
* };
*
* This function allocates and extracts that binary structure directly
* from the RSA private key, rather than from a file.
*
* @param rsa_private_key RSA private key (duh)
* @param keyb_data Pointer to newly allocated binary blob
* @param keyb_size Size of newly allocated binary blob
*
* @return 0 on success, non-zero if unable to allocate enough memory.
*/
int vb_keyb_from_rsa(struct rsa_st *rsa_private_key,
uint8_t **keyb_data, uint32_t *keyb_size);
#endif /* VBOOT_REFERENCE_UTIL_MISC_H_ */
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