NAME

RSA_size - get RSA modulus size

LIBRARY

libcrypto, -lcrypto

SYNOPSIS

#include <openssl/rsa.h>

int RSA_size(const RSA *rsa);

DESCRIPTION

This function 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->n must not be NULL.

RETURN VALUE

The size in bytes.

SEE ALSO

openssl_rsa(3)

HISTORY

RSA_size() is available in all versions of SSLeay and OpenSSL.