Unix/Linux Go Back    

RedHat 9 (Linux i386) - man page for rand_bytes (redhat section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)

RAND_bytes(3)				     OpenSSL				    RAND_bytes(3)

       RAND_bytes, RAND_pseudo_bytes - generate random data

	#include <openssl/rand.h>

	int RAND_bytes(unsigned char *buf, int num);

	int RAND_pseudo_bytes(unsigned char *buf, int num);

       RAND_bytes() puts num cryptographically strong pseudo-random bytes into buf. An error
       occurs if the PRNG has not been seeded with enough randomness to ensure an unpredictable
       byte sequence.

       RAND_pseudo_bytes() puts num pseudo-random bytes into buf.  Pseudo-random byte sequences
       generated by RAND_pseudo_bytes() will be unique if they are of sufficient length, but are
       not necessarily unpredictable. They can be used for non-cryptographic purposes and for
       certain purposes in cryptographic protocols, but usually not for key generation etc.

       RAND_bytes() returns 1 on success, 0 otherwise. The error code can be obtained by
       ERR_get_error(3). RAND_pseudo_bytes() returns 1 if the bytes generated are cryptographi-
       cally strong, 0 otherwise. Both functions return -1 if they are not supported by the cur-
       rent RAND method.

       rand(3), ERR_get_error(3), RAND_add(3)

       RAND_bytes() is available in all versions of SSLeay and OpenSSL.  It has a return value
       since OpenSSL 0.9.5. RAND_pseudo_bytes() was added in OpenSSL 0.9.5.

0.9.7a					    2002-09-25				    RAND_bytes(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums

All times are GMT -4. The time now is 09:55 AM.