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crypto_get_ex_data

CRYPTO_set_ex_data(3)						      OpenSSL						     CRYPTO_set_ex_data(3)

NAME

       CRYPTO_set_ex_data, CRYPTO_get_ex_data - internal application specific data functions

SYNOPSIS

	#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);

DESCRIPTION

       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 application.

       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.

RETURN VALUES

       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).

SEE ALSO

       RSA_get_ex_new_index(3), DSA_get_ex_new_index(3), DH_get_ex_new_index(3)

HISTORY

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

50								    2013-03-05						     CRYPTO_set_ex_data(3)