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RSA_size(3)                         OpenSSL                        RSA_size(3)

NAME
       RSA_size - get RSA modulus size
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
       rsa(3)
HISTORY
       RSA_size() is available in all versions of SSLeay and OpenSSL.

1.0.2k                            2017-01-26                       RSA_size(3)