platform/msm_shared/include/image_verify.h

/*
 * Copyright (c) 2011,2014-2015 The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef __IMAGE_VERIFY_H
#define __IMAGE_VERIFY_H

#include <x509.h>

#define SHA1_SIZE      16
#define SHA256_SIZE    32
/* For keys of length 2048 bits */
#define SIGNATURE_SIZE 256

static int image_decrypt_signature(unsigned char *signature_ptr,
				   unsigned char *plain_text);
int image_verify(unsigned char *image_ptr,
		 unsigned char *signature_ptr,
		 unsigned int image_size, unsigned hash_type);

/* Decrypt signature with RSA public key */
int image_decrypt_signature_rsa(unsigned char *signature_ptr,
		unsigned char *plain_text, RSA *rsa_key);

/* Find hash of image */
void image_find_digest(unsigned char *image_ptr, unsigned int image_size,
		unsigned hash_type, unsigned char *digest);
void save_kernel_hash_cmd(void *digest);
void save_kernel_hash(unsigned char *digest, unsigned hash_type);
#endif