ctr_eFuse/trunk/readme.txt

CTR - ID生成関数について 2009/09/30

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要、opensslライブラリ（バージョン0.9.8以上）
現在、openssl-1.0.0-beta2とopenssl-0.9.8kでテスト中。

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ファイル構成：
  readme.txt
  readme_openssl.txt
  LICENSE_en.txt
  LICENSE_jp.txt
　cr_generate_id.h 
　cr_generate_id.c 
　cr_alloc.h
　cr_alloc.c 
　cr_gen_id_rsa_key_priv.c
　cr_gen_id_rsa_key_priv.h
　cr_gen_id_rsa_key_pub.c
　cr_gen_id_rsa_key_pub.h
  maim.c(使用サンプル)
  Makefile(Windows cygwin環境用)

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関数仕様：

#define CR_ID_BUF_SIZE                (2048/8)
#define CR_NUM_OF_SERIAL               5

typedef signed char  s8;
typedef unsigned char  u8;
typedef unsigned short u16;
typedef unsigned long  u32;
typedef unsigned long long u64;

int cr_generate_id(u32 counter[CR_NUM_OF_SERIAL], u8 id[ID_BUF_SIZE]);
/*
    Core2 Duo 2.66GHz 2GB で約0.016sec
*/
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使用サンプル：

main()
{
     u8 id_buf[CR_ID_BUF_SIZE]; /* 256byte(2048bit) */
     u32 counter_array[CR_NUM_OF_SERIAL];

     u32 counter0 = 1;
     u64 counter1 = 2;
     u64 counter2 = 3;


     while( 1 ) {
	counter_array[0] = counter0;
	counter_array[1] = (u32)(counter1 & 0xffffffff );
	counter_array[2] = (u32)( (counter1 >> 32) & 0xffffffff );
	counter_array[3] = (u32)(counter2 & 0xffffffff );
	counter_array[4] = (u32)( (counter2 >> 32) & 0xffffffff ); 

	if( 0 != cr_generate_id(counter_array, id_buf) ) {
	    fprintf(stderr,"cr_generate_id failed c=0x%08x\n",counter0);
	}
	else {
	    fwrite(id, CR_ID_BUF_SIZE, 1, fp);
	}
	counter0++;
        counter1 += (u64)rand();
        counter2 += (u64)rand();
     }
}