BN_num_bytes(3)

     NAME
          BN_num_bits, BN_num_bytes, BN_num_bits_word - get BIGNUM
          size

     SYNOPSIS
           #include <openssl/bn.h>

           int BN_num_bytes(const BIGNUM *a);

           int BN_num_bits(const BIGNUM *a);

           int BN_num_bits_word(BN_ULONG w);


     DESCRIPTION
          These functions return the size of a BIGNUM in bytes or
          bits, and the size of an unsigned integer in bits.

          BN_num_bytes() is a macro.

     RETURN VALUES
          The size.

     SEE ALSO
          bn(3)

     HISTORY
          BN_num_bytes(), BN_num_bits() and BN_num_bits_word() are
          available in all versions of SSLeay and OpenSSL.