RSA_size 3 2003-07-24 0.9.9-dev OpenSSL

### NAME

RSA_size - get RSA modulus size

### LIBRARY

libcrypto, -lcrypto

### SYNOPSIS

     #include

     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.