8051操作加密晶片原始碼
阿新 • • 發佈：2018-10-31
8051 微控制器操作SMEC98SP加密晶片的事例程式碼,如果需要完整程式碼(包括加密晶片程式碼),請到中巨偉業 http://www.sinormous.com/download.html免費下載
void SMEC_Test(void)
{
/*各種金鑰,不會在I2C線路上傳輸,可以使用同一組.應該將金鑰分散儲存,防止主控晶片被破解後,被攻擊者在二進位制碼中找到金鑰 */ unsigned char InternalKey[16] = {0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F};//內部認證金鑰,必須和SMEC98SP一致 unsigned char ExternalKey[16] = {0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F};//外部認證金鑰,必須和SMEC98SP一致 unsigned char SHA1_Key[16] = {0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F}; //雜湊演算法認證金鑰,必須和SMEC98SP一致 unsigned char MKey[16] = {0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F}; //主控金鑰,用於產生過程金鑰,必須和SMEC98SP一致 unsigned char Pin[8] = {0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc}; //Pin認證金鑰,必須和SMEC98SP一致 unsigned char bSmec98spUid[12] = {0}; //存放SMEC98SP的UID unsigned short RandomSeek = 0; //隨機數種子 unsigned char bRandom[8] = {0}; //存放隨機數 unsigned char bSessionKey[8] = {0}; //存放過程金鑰,過程金鑰為臨時產生的金鑰 unsigned char bDataBuf[64] = {0}; unsigned char ret, bLen; unsigned short i, j; /*獲取SMEC98SP的UID*/ ret = SMEC_GetUid(bSmec98spUid); if(ret) { print_string("SMEC_GetUid -> Error !\r\n"); while(1); } print_string("SMEC_GetUid: "); PrintHex(bSmec98spUid, 12); print_string("\r\n"); /*取加密晶片的隨機數，作為MCU的RandomSeek因子,也可以用其他外部因素，如按鍵等待時間等*/ if(SMEC_GetRandom(bDataBuf))//獲取8位元組隨機數 { print_string("SMEC_GetRandom -> Error !\r\n"); while(1); } for(i = 0; i < 4; i += 2) { /*使RandomSeek與加密晶片隨機數有關*/ j = (bDataBuf[i] << 8) + bDataBuf[i + 1]; RandomSeek ^= j; } for(i = 0; i < 6; i += 2) { /*使RandomSeek與SMEC98SP的UID相關,使得即使相同狀況下,不同的加密晶片,RandomSeek值也不一樣*/ j = (bSmec98spUid[i] << 8) + bSmec98spUid[i + 1]; RandomSeek ^= j; } srand(RandomSeek); print_string("RandomSeek:"); PrintHex((unsigned char *)&RandomSeek, 2); /*PIN碼驗證*/ ret = SMEC_CheckPin(Pin, (unsigned char)sizeof(Pin)); if(ret) { print_string("SMEC_CheckPin -> Error !\r\n"); while(1); } print_string("SMEC_CheckPin OK !\r\n"); /*內部認證, 主控晶片對SMEC98SP加密晶片合法性判斷*/ for(i = 0; i < 8; i ++) { bRandom[i] = (unsigned char) rand(); } ret = SMEC_IntrAuth(InternalKey, bRandom); if(ret) { print_string("SMEC_IntrAuth -> Error !\r\n"); while(1); } print_string("SMEC_IntrAuth OK !\r\n"); /*外部認證, SMEC98SP加密晶片對主控晶片合法性判斷*/ ret = SMEC_ExtrAuth(ExternalKey); if(ret) { print_string("SMEC_ExtrAuth -> Error !\r\n"); while(1); } print_string("SMEC_ExtrAuth OK !\r\n"); /*SHA1摘要演算法認證, 資料長度可自己設定*/ for(i = 0; i < 16; i ++) { bDataBuf[i] = (unsigned char) rand(); } ret = SMEC_Sha1Auth(SHA1_Key, (unsigned char)sizeof(SHA1_Key), bDataBuf, 16); if(ret) { print_string("SMEC_Sha1Auth -> Error !\r\n"); while(1); } print_string("SMEC_Sha1Auth OK !\r\n"); /*呼叫加密晶片內部計算圓周長演算法*/ bDataBuf[0] = 0x02; ret = SMEC_CircleAlg(bDataBuf, 1, bDataBuf, &bLen); if(ret) { print_string("SMEC_CircleAlg -> Error !\r\n"); while(1); } print_string("SMEC_CircleAlg OK, C = "); PrintHex(bDataBuf, 1); /*產生過程金鑰,用於後續的Flash資料加密讀,及構造的"埠資料運算"*/ for(i = 0; i < 8; i ++) { bRandom[i] = (unsigned char) rand(); } ret = SMEC_GenSessionKey(MKey, bRandom, bSessionKey); if(ret) { print_string("SMEC_GenSessionKey -> Error !\r\n"); while(1); } print_string("SMEC_GenSessionKey OK !\r\n"); /*密文讀取Flash資料*/ ret = SMEC_CryptReadFlash(bSessionKey, 0x0000, bDataBuf, 16); if(ret) { print_string("SMEC_CryptReadFlash -> Error !\r\n"); while(1); } print_string("SMEC_CryptReadFlash OK:\r\n"); PrintHex(bDataBuf, 16); /*讀取Flash資料*/ ret = SMEC_ReadFlash(0x0000, bDataBuf, 16); if(ret) { print_string("SMEC_ReadFlash -> Error !\r\n"); while(1); } print_string("SMEC_ReadFlash OK:\r\n"); PrintHex(bDataBuf, 16); /*寫Flash資料*/ for(i = 0; i < 16; i ++) { bDataBuf[i] = (unsigned char) i; } ret = SMEC_WriteFlash(0x0000, bDataBuf, 16); if(ret) { print_string("SMEC_WriteFlash -> Error !\r\n"); while(1); } print_string("SMEC_WriteFlash OK!\r\n"); /*構造"埠資料運算", 可以用實際的PA~PC埠資料*/ bDataBuf[0] = 0x00; bDataBuf[1] = 0x00; ret = SMEC_GpioAlg(bSessionKey, bDataBuf,2, bDataBuf); if(ret) { print_string("SMEC_GpioAlg -> Error !\r\n"); while(1); } print_string("SMEC_GpioAlg OK:\r\n"); PrintHex(bDataBuf, 2); /*呼叫加密晶片內部計算圓周長演算法,並密文線上路上傳輸*/ bDataBuf[0] = 0x02; ret = SMEC_CircleAlgCrypt(bSessionKey, bDataBuf, 1, bDataBuf, &bLen); if(ret) { print_string("SMEC_CircleAlgCrypt -> Error !\r\n"); while(1); } print_string("SMEC_CircleAlgCrypt OK, C = "); PrintHex(bDataBuf, 1);
}