mcu/tools/NVRAMStatistic/src/nvram_hash_check.c

/*****************************************************************************
*  Copyright Statement:
*  --------------------
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*  herein is confidential. The software may not be copied and the information
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/*****************************************************************************
 *
 * Filename:
 * ---------
 * nvram_hash_check.c
 *
 * Project:
 * --------
 *   UMOLYA
 *
 * Description:
 * ------------
 *   This file is use to check LID hash info correct.
 *
 * Author:
 * -------
 * -------
 *
 *============================================================================
 *             HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *------------------------------------------------------------------------------
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 *------------------------------------------------------------------------------
 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!!
 *============================================================================
 ****************************************************************************/

#include <string.h>
#include "nvram_hash_check.h" 
#include "md5.h"

//#define HASH_CHECK_DEBUG

kal_bool nvram_hash_check(nvram_ltable_entry_struct *ldi) {
#ifdef __NVRAM_LID_HASH_CHECK__
	static kal_bool first_print = KAL_TRUE;
	char strbuf[256] = {0};
	unsigned char digest[17] = {0};
	unsigned int hash;
	MD5_CTX context = {0};
	
	MD5_Init(&context);
	sprintf(strbuf, "%d;%s;%s;%s;", ldi->LID, ldi->str_LID, ldi->fileprefix, ldi->fileverno);
#ifdef HASH_CHECK_DEBUG
	fprintf(stderr, "debug: %s\n", strbuf);
#endif
	MD5_Update(&context, strbuf, strlen(strbuf));
	MD5_Final(digest, &context);
#ifdef HASH_CHECK_DEBUG
	fprintf(stderr, "debug: %02X %02X %02X %02X\n", digest[0], digest[1], digest[2], digest[3]);
	fprintf(stderr, "debug: %02X %02X %02X %02X\n", digest[4], digest[5], digest[6], digest[7]);
	fprintf(stderr, "debug: %02X %02X %02X %02X\n", digest[8], digest[9], digest[10], digest[11]);
#endif	
	hash =  (digest[4]<<4 | digest[5]>>4) << 24;
	hash |= (digest[5]<<4 | digest[6]>>4) << 16;
	hash |= (digest[6]<<4 | digest[7]>>4) << 8;
	hash |= (digest[7]<<4 | digest[8]>>4);
#ifdef HASH_CHECK_DEBUG
	fprintf(stderr, "debug: 0x%08X\n", hash);
#endif	
	if(hash != ldi->hash_key) {
		if(first_print) {
			fprintf(stderr, "error: Need register LID http://wiki.mediatek.inc/display/NVRAM/How+to+apply+LID+HASH+key\n");
			fprintf(stderr, "error: This feature is just internal use. Please set NVRAM_LID_HASH_CHECK = FALSE for customer.\n");
			first_print = KAL_FALSE;
		}
		fprintf(stderr, "error: %s (0x%08x) hash key is not match.\n", ldi->str_LID, ldi->hash_key);
		fprintf(stderr, "debug: %d %s %s %s\n", ldi->LID, ldi->str_LID, ldi->fileprefix, ldi->fileverno);
		return KAL_FALSE;
	}
#endif
	return KAL_TRUE;
}