RSA_size, RSA_bits - get RSA modulus size
#include <openssl/rsa.h>
int RSA_size(const RSA *rsa);
int RSA_bits(const RSA *rsa);
RSA_size() returns the RSA modulus size in bytes. It can be used to determine how much memory must be allocated for an RSA encrypted value.
RSA_bits() returns the number of significant bits.
rsa and rsa->n must not be NULL.
The size.
HISTORY
RSA_bits() was added in OpenSSL 1.1.0. Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.COPYRIGHT