RSA_bits (3)

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NAME

RSA_size, RSA_bits - get RSA modulus size

SYNOPSIS

#include <openssl/rsa.h>

int RSA_size(const

*rsa);

int RSA_bits(const

*rsa);

DESCRIPTION

RSA_size() returns the modulus size in bytes. It can be used to determine how much memory must be allocated for an encrypted value.

RSA_bits() returns the number of significant bits.

rsa and rsa->n must not be

.

RETURN VALUE

The size.

SEE ALSO

BN_num_bits(3)

HISTORY

RSA_bits() was added in OpenSSL 1.1.0.

COPYRIGHT

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

in the source distribution or at <www.openssl.org/source/license.html>.