RSA_size
RSA_SIZE(3SSL) OpenSSL RSA_SIZE(3SSL)
NAME
RSA_size, RSA_bits, RSA_security_bits - get RSA modulus size or
security bits
SYNOPSIS
#include <openssl/rsa.h>
int RSA_size(const RSA *rsa);
int RSA_bits(const RSA *rsa);
int RSA_security_bits(const RSA *rsa)
DESCRIPTION
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.
RSA_security_bits() returns the number of security bits of the given
rsa key. See BN_security_bits(3).
RETURN VALUES
RSA_size() returns the size of modulus in bytes.
DSA_bits() returns the number of bits in the key.
RSA_security_bits() returns the number of security bits.
SEE ALSO
BN_num_bits(3)
HISTORY
The RSA_bits() function was added in OpenSSL 1.1.0.
COPYRIGHT
Copyright 2000-2018 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>.
1.1.1f 2023-10-10 RSA_SIZE(3SSL)
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