介绍了加密芯片SMEC98SP的使用方法，设计到方案中，防止被破解公司破解，窃取了自己的劳动果实
工具/原料
SMEC98SP加密芯片一颗
SMEC98SP加密芯片开发板编程器一个
方法/步骤
1、读取加密芯片ID号，这个ID号可用来做唯一ID身份识别，逐吴哉姆可以设计到加密方案中。代码如下：unsignedcharRead_UID(unsignedchar惺绅寨瞀*UID){ ucharret; uchariic_addr; ucharlen; iic_addr=0x00; iic_buff[0]=0x83; iic_buff[1]=0x00; iic_buff[2]=0x00; iic_buff[3]=0x0c; //一共是0x0c个字节 len=iic_buff[3]; ret=IIC_WriteWithAddr(iic_addr&0xFE,iic_buff,4); if(ret)//出错 { return1; }// delay_nms(1); ret= IIC_ReadWithAddr(iic_addr|0x1,UID,(len+2)); if(ret) { return1; } return0; //读取成功}
2、读取随机数，随机数是参与密码运算的重要过程数据，每次都不缬方焱蜱一样的数据传输，破解者无法获得规律。//读疣迩疔牦8字节随机数，返回：9000data1data2.....data8unsignedcharRead_random(unsignedchar*random){ ucharret; uchariic_addr; ucharlen; iic_addr=0x00; iic_buff[0]=0x84; iic_buff[1]=0x00; iic_buff[2]=0x00; iic_buff[3]=0x08; //一共是0x08个字节 len=iic_buff[3]; ret=IIC_WriteWithAddr(iic_addr&0xFE,iic_buff,4); if(ret)//出错 { return1; }// delay_nms(5); ret= IIC_ReadWithAddr(iic_addr|0x1,random,(len+2)); if(ret) { return1; } return0; //读取成功}
3、密码认证，密文传输。unsignedcharPIN_authentication(unsignedchar*ret_data){ ucharret; uchariic_addr; iic_addr=0x00; iic_buff[0]=0x70; iic_buff[1]=0x00; iic_buff[2]=0x00; iic_buff[3]=0x08; // memcpy(&iic_buff[4],PinKey,8); ret=IIC_WriteWithAddr(iic_addr&0xFE,iic_buff,4+8); if(ret)//出错 { return1; }// delay_nms(5); ret= IIC_ReadWithAddr(iic_addr|0x1,ret_data,2); if(ret) { return1; } return0; //读取成功}
4、添加一个算法unsignedcharcircumference(unsignedcharradius,unsignedchar*ret_data){ ucharret; uchariic_addr; iic_addr=0x00; iic_buff[0]=0x72; iic_buff[1]=0x00; iic_buff[2]=0x00; iic_buff[3]=1; // iic_buff[4]=radius; ret=IIC_WriteWithAddr(iic_addr&0xFE,iic_buff,4+1); if(ret)//出错 { return1; }// delay_nms(5); ret= IIC_ReadWithAddr(iic_addr|0x1,ret_data,3); if(ret) { return1; } return0; //读取成功}