CRYPTO_set_ex_data man page on Manjaro

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CRYPTO_set_ex_data(3)		    OpenSSL		 CRYPTO_set_ex_data(3)

       CRYPTO_set_ex_data, CRYPTO_get_ex_data - internal application specific
       data functions

	#include <openssl/crypto.h>

	int CRYPTO_set_ex_data(CRYPTO_EX_DATA *r, int idx, void *arg);

	void *CRYPTO_get_ex_data(CRYPTO_EX_DATA *r, int idx);

       Several OpenSSL structures can have application specific data attached
       to them.	 These functions are used internally by OpenSSL to manipulate
       application specific data attached to a specific structure.

       These functions should only be used by applications to manipulate
       CRYPTO_EX_DATA structures passed to the new_func(), free_func() and
       dup_func() callbacks: as passed to RSA_get_ex_new_index() for example.

       CRYPTO_set_ex_data() is used to set application specific data, the data
       is supplied in the arg parameter and its precise meaning is up to the

       CRYPTO_get_ex_data() is used to retrieve application specific data. The
       data is returned to the application, this will be the same value as
       supplied to a previous CRYPTO_set_ex_data() call.

       CRYPTO_set_ex_data() returns 1 on success or 0 on failure.

       CRYPTO_get_ex_data() returns the application data or 0 on failure. 0
       may also be valid application data but currently it can only fail if
       given an invalid idx parameter.

       On failure an error code can be obtained from ERR_get_error(3).

       RSA_get_ex_new_index(3), DSA_get_ex_new_index(3),

       CRYPTO_set_ex_data() and CRYPTO_get_ex_data() have been available since
       SSLeay 0.9.0.

1.0.1g				  2014-03-17		 CRYPTO_set_ex_data(3)

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