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CentOS 7.0 - man page for rsa_size (centos section 3)

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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.

1.0.1e					    2013-02-11				      RSA_size(3)
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