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
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 VALUESCRYPTO_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 ALSORSA_get_ex_new_index(3), DSA_get_ex_new_index(3),
DH_get_ex_new_index(3)HISTORYCRYPTO_set_ex_data() and CRYPTO_get_ex_data() have been
available since SSLeay 0.9.0.
16/Aug/2000 0.9.6 1
CRYPTO_set_ex_data(3) OpenSSL CRYPTO_set_ex_data(3)16/Aug/2000 0.9.6 2
