mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-04 14:00:19 +00:00
da29f2991d
Padding verification was done against static SHA/RSA pair arrays which take up a lot of static memory, are mostly 0xff, and cannot be reused for additional SHA/RSA pairings. The padding can be easily computed according to PKCS#1v2.1 as: EM = 0x00 || 0x01 || PS || 0x00 || T where PS is (emLen - tLen - 3) octets of 0xff and T is DER encoding of the hash. Store DER prefix in checksum_algo and create rsa_verify_padding function to handle verification of a message for any SHA/RSA pairing. Signed-off-by: Andrew Duda <aduda@meraki.com> Signed-off-by: aduda <aduda@meraki.com> Reviewed-by: Simon Glass <sjg@chromium.org>
30 lines
702 B
C
30 lines
702 B
C
/*
|
|
* Copyright (c) 2013, Andreas Oetken.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _RSA_CHECKSUM_H
|
|
#define _RSA_CHECKSUM_H
|
|
|
|
#include <errno.h>
|
|
#include <image.h>
|
|
#include <u-boot/sha1.h>
|
|
#include <u-boot/sha256.h>
|
|
|
|
/**
|
|
* hash_calculate() - Calculate hash over the data
|
|
*
|
|
* @name: Name of algorithm to be used for hash calculation
|
|
* @region: Array having info of regions over which hash needs to be calculated
|
|
* @region_count: Number of regions in the region array
|
|
* @checksum: Buffer contanining the output hash
|
|
*
|
|
* @return 0 if OK, < 0 if error
|
|
*/
|
|
int hash_calculate(const char *name,
|
|
const struct image_region region[], int region_count,
|
|
uint8_t *checksum);
|
|
|
|
#endif
|