Hi, we have linked FIPS compliant openssl version against our applications.
Now few applications are using libc rand function. For FIPS compliance,
applications have
to call approved SP 800-90A DRBG implementation. I was planning to replace
libc rand with RAND_bytes
for the same.
But rand() returns max value of 32767 . Is there a recomended way to
convert RAND_bytes to libc rand()
something like this?
unsigned char buf[2];
RAND_bytes(buf,2)
int *rndp = malloc(4);
memcpy(rndp,buf,2);
return (unsigned) ((*rndp) % 32768)
Please suggest . Is there a way to give number of bits instead of bytes to
RAND_bytes?
Regards,
Now few applications are using libc rand function. For FIPS compliance,
applications have
to call approved SP 800-90A DRBG implementation. I was planning to replace
libc rand with RAND_bytes
for the same.
But rand() returns max value of 32767 . Is there a recomended way to
convert RAND_bytes to libc rand()
something like this?
unsigned char buf[2];
RAND_bytes(buf,2)
int *rndp = malloc(4);
memcpy(rndp,buf,2);
return (unsigned) ((*rndp) % 32768)
Please suggest . Is there a way to give number of bits instead of bytes to
RAND_bytes?
Regards,
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