br_GFH_anti_clone.c
4.56 KB
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/*****************************************************************************
* Copyright Statement:
* --------------------
* This software is protected by Copyright and the information contained
* herein is confidential. The software may not be copied and the information
* contained herein may not be used or disclosed except with the written
* permission of MediaTek Inc. (C) 2009
*
* BY OPENING THIS FILE, BUYER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO BUYER ON
* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND BUYER AGREES TO LOOK ONLY TO SUCH
* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. MEDIATEK SHALL ALSO
* NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE RELEASES MADE TO BUYER'S
* SPECIFICATION OR TO CONFORM TO A PARTICULAR STANDARD OR OPEN FORUM.
*
* BUYER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND CUMULATIVE
* LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY BUYER TO
* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*
* THE TRANSACTION CONTEMPLATED HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE
* WITH THE LAWS OF THE STATE OF CALIFORNIA, USA, EXCLUDING ITS CONFLICT OF
* LAWS PRINCIPLES. ANY DISPUTES, CONTROVERSIES OR CLAIMS ARISING THEREOF AND
* RELATED THERETO SHALL BE SETTLED BY ARBITRATION IN SAN FRANCISCO, CA, UNDER
* THE RULES OF THE INTERNATIONAL CHAMBER OF COMMERCE (ICC).
*
*****************************************************************************/
/*****************************************************************************
*
* Filename:
* ---------
* br_GFH_anti_clone.c
*
* Project:
* --------
* GFH
*
* Description:
* ------------
* ANTI_CLONE GFH structure implementation
*
* Author:
* -------
* -------
*
****************************************************************************/
#include "br_GFH_anti_clone.h"
#include "br_bootrom_error.h"
//==============================================================================
// GFH: ANTI_CLONE exported APIs
//==============================================================================
U32 GFH_ANTI_CLONE_IsValid(const GFH_FILE_INFO_v1 *p_gfh_file_info,
const GFH_ANTI_CLONE_v1 *p_gfh_anti_clone)
{
U32 ac_offset;
U32 ac_len;
U32 ac_valid_len;
//-------------------------------------------------
// check FILE_INFO
//-------------------------------------------------
if( NULL == p_gfh_file_info )
{
return E_GFH_FILE_INFO_NOT_FOUND;
}
//-------------------------------------------------
// check ANTI_CLONE
//-------------------------------------------------
if( NULL == p_gfh_anti_clone )
{
return E_GFH_ANTI_CLONE_NOT_FOUND;
}
// get current BL AC_K_EN/AC_C_EN setting to check if Anti-clone is enabled
if( !(p_gfh_anti_clone->m_ac_b2k || p_gfh_anti_clone->m_ac_b2c) )
{
// Anti-clone is disabled
return B_OK;
}
//-------------------------------------------------
// check AC offset and len
//-------------------------------------------------
ac_offset = p_gfh_anti_clone->m_ac_offset;
ac_len = p_gfh_anti_clone->m_ac_len;
// check if file content length is valid
if( p_gfh_file_info->m_file_len <= p_gfh_file_info->m_content_offset + p_gfh_file_info->m_sig_len )
{
// file content length is invalid, there is no available anti-clone area
return E_AC_FILE_CONTENT_LEN_INVALID;
}
// calculate valid anti-clone area
ac_valid_len = (p_gfh_file_info->m_file_len - p_gfh_file_info->m_content_offset - p_gfh_file_info->m_sig_len);
// check if anti-clone area locates in valid region
if( (0 == ac_len)
|| (ac_valid_len <= ac_offset)
|| (ac_valid_len <= ac_len)
|| ((ac_valid_len-ac_offset) <= ac_len)
) {
// Anti-clone area must locate between content offset and signature addr
return E_AC_OFFSET_OR_LEN_INVALID;
}
return B_OK;
}