openssl随机数测试

main.c部分代码

int main(){

    void ** pdh;
	pdh = (void **) malloc(20);
	int ret;

    /*ret = SDF_OpenDevice(pdh);
	if(ret != SDR_OK){
        printf("error!");
	} else {
		printf("device opened!\n");
	}

    DEVICEINFO testdi;
    ret = SDF_GetDeviceInfo(pdh, &testdi);
	if(ret != SDR_OK){
        printf("error!");
	} else {
        printf("Issuer Name: %s\n", testdi.IssuerName);
        printf("Device Name: %s\n", testdi.DeviceName);
        printf("Device Serial: %s\n", testdi.DeviceSerial);
        printf("Device Version: %d\n", testdi.DeviceVersion);
		
	}*/
	unsigned int n; 
   unsigned char pRandom[10017];
	scanf("%d", &n);
   ret = SDF_GenerateRandom(*pdh, n, pRandom);
	if(ret != SDR_OK){
        printf("error!");
	} else {
        for(int i=0; i<n; i++)
            printf("%02x", pRandom[i]);
	}
	printf("\n");

    ret = SDF_CloseDevice(*pdh);
	
	/*if(ret != SDR_OK){
        printf("error!");
	} else {
		free(pdh);
		printf("device closed!\n");
	}*/

	return 0;
}

sdf.c代码

static int getRandom(char *r, int length)
{
        BIGNUM *bn;
        int i;
        bn = BN_new(); //生成一个BIGNUM结构
 
        //int bits = 20;
        int top = -1;
        int bottom = 1;
 
        BN_rand(bn, length *8, top, bottom); //生成指定bits的随机数   uilength是bits数= length *8，而length是字节数 = uilengh/8
 
        char *a = BN_bn2hex(bn); //转化成16进制字符串
        //puts(a);
        //printf("\n");
        for(i=0;*(a+i)!='\0';i++)
        {
            *(r+i)=*(a+i);
        }
 
        *(r+i)='\0';
        BN_free(bn); //释放BIGNUM结构
        return 0;
}
int SDF_GenerateRandom (void * hSessionHandle,unsigned int uiLength,unsigned char * pucRandom)
{
        int k=getRandom(pucRandom,uiLength/8);
        if(k==0)
        printf("生成随机数成功！");
         
        return SDR_OK;
}

还要记得在头文件里加上#include <openssl/rand.h>

测试结果

可知正确