NEINT32 RSAinit_random(R_RANDOM_STRUCT *rStruct)
{
NEINT32 ret,i, num ;
NEINT8 *p_randblock, *paddr ;
static NEINT8 _randbuf[] = { 0x12, 0xf3 , 0x44, 0x78, 0xad,0x9f,0xf1,0x01,0xb3,0x32,0x5a,0x67,0x8c,0x2f,0xb8,0xde} ;
if(R_RandomInit(rStruct)){
return -1;
}
R_GetRandomBytesNeeded(&ret, rStruct) ;
p_randblock = malloc(ret) ;
if(!p_randblock)
return 1 ;
num = ret/sizeof(_randbuf) ;
paddr = p_randblock ;
for(i=0; i<num; i++){
memcpy(paddr,_randbuf,sizeof(_randbuf) ) ;
paddr += sizeof(_randbuf) ;
}
R_RandomUpdate(rStruct, p_randblock, ret) ;
free(p_randblock);
return 0;
}
void main(void)
{
unsigned char freshout[20], seedbyte = 1;
unsigned int bytesneeded;
R_RANDOM_STRUCT randomstruct;
fprintf(stderr, "RANDEMO - Random Object Demo Using %s.\n", RSAEURO_IDENT);
R_RandomCreate(&randomstruct);
R_GenerateBytes(freshout, sizeof(freshout), &randomstruct);
printf("\n Random Output 1 - ");
printbuff(freshout, sizeof(freshout));
R_RandomMix(&randomstruct);
R_GenerateBytes(freshout, sizeof(freshout), &randomstruct);
printf(" Mixed Random Output 1 - ");
printbuff(freshout, sizeof(freshout));
R_RandomFinal(&randomstruct);
R_RandomInit(&randomstruct);
while(1) {
R_GetRandomBytesNeeded(&bytesneeded, &randomstruct);
if(bytesneeded == 0)
break;
R_RandomUpdate(&randomstruct, &seedbyte, 1);
}
R_GenerateBytes(freshout, sizeof(freshout), &randomstruct);
printf(" Random Output 2 - ");
printbuff(freshout, sizeof(freshout));
R_RandomMix(&randomstruct);
R_GenerateBytes(freshout, sizeof(freshout), &randomstruct);
printf(" Mixed Random Output 2 - ");
printbuff(freshout, sizeof(freshout));
R_GenerateBytes(freshout, sizeof(freshout), &randomstruct);
printf(" Mixed Random Output 2 - ");
printbuff(freshout, sizeof(freshout));
R_RandomFinal(&randomstruct);
}
static int rsaref_public_encrypt(int len, const unsigned char *from, unsigned char *to,
RSA *rsa, int padding)
{
int outlen= -1;
int i;
R_RSA_PUBLIC_KEY RSAkey;
R_RANDOM_STRUCT rnd;
unsigned char buf[16];
if (padding != RSA_PKCS1_PADDING && padding != RSA_SSLV23_PADDING)
{
RSAREFerr(RSAREF_F_RSAREF_PUBLIC_ENCRYPT, RSA_R_UNKNOWN_PADDING_TYPE);
goto err;
}
R_RandomInit(&rnd);
R_GetRandomBytesNeeded((unsigned int *)&i,&rnd);
while (i > 0)
{
if (RAND_bytes(buf,16) <= 0)
goto err;
R_RandomUpdate(&rnd,buf,(unsigned int)((i>16)?16:i));
i-=16;
}
if (!RSAref_Public_eay2ref(rsa,&RSAkey))
goto err;
if ((i=RSAPublicEncrypt(to,(unsigned int *)&outlen,(unsigned char *)from,len,&RSAkey,&rnd)) != 0)
{
RSAREFerr(RSAREF_F_RSAREF_PUBLIC_ENCRYPT,i);
outlen= -1;
goto err;
}
err:
memset(&RSAkey,0,sizeof(RSAkey));
R_RandomFinal(&rnd);
memset(&rnd,0,sizeof(rnd));
return(outlen);
}