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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.

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

  The CRYPTO_get_ex_data() function 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
  The CRYPTO_set_ex_data() function returns 1 on success or 0 on failure.

  The CRYPTO_get_ex_data() function returns the application data or 0 on
  failure. Zero 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().

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

SEE ALSO
  Functions: RSA_get_ex_new_index(3), DSA_get_ex_new_index(3),
  DH_get_ex_new_index(3)

Index for Section 3

Alphabetical listing for C

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