RSA_size.3ssl man page

RSA_size ā€” 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.

Referenced By

BN_num_bytes.3ssl(3), rsa.3ssl(3), RSA_get0_key.3ssl(3), RSA_meth_new.3ssl(3), RSA_public_encrypt.3ssl(3).

2016-09-26 1.0.2j OpenSSL