/xlv3/openssl/0.9.7e-sgipl1/work/0.9.7e-sgipl1/openssl-
0.9.7e/doc/crypto
Page 1 (printed 10/20/05)
CRYPTO_set_ex_data(3) 29/Jan/2000 (0.9.7e) 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 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.
Page 1 (printed 10/20/05)
CRYPTO_set_ex_data(3) 29/Jan/2000 (0.9.7e) CRYPTO_set_ex_data(3)
Page 2 (printed 10/20/05)
