BN_bn2dec
if ((rsa_e_dec = BN_bn2dec(RSA_get0_e(rsa))) == NULL)
s = prime_config.hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
return BN_bn2dec(bn);
char * BN_bn2dec(const BIGNUM *a);
buf = BN_bn2dec(num);
char *p = BN_bn2dec(n->number);
char *p = BN_bn2dec(n);