- * @param gc key generation context to abort
- */
-void
-GNUNET_CRYPTO_ecc_key_create_stop (struct GNUNET_CRYPTO_EccKeyGenerationContext *gc)
-{
- if (GNUNET_SCHEDULER_NO_TASK != gc->read_task)
- {
- GNUNET_SCHEDULER_cancel (gc->read_task);
- gc->read_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (NULL != gc->gnunet_ecc)
- {
- (void) GNUNET_OS_process_kill (gc->gnunet_ecc, SIGKILL);
- GNUNET_break (GNUNET_OK ==
- GNUNET_OS_process_wait (gc->gnunet_ecc));
- GNUNET_OS_process_destroy (gc->gnunet_ecc);
- GNUNET_DISK_pipe_close (gc->gnunet_ecc_out);
- }
-
- if (NULL != gc->filename)
- {
- if (0 != UNLINK (gc->filename))
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink", gc->filename);
- GNUNET_free (gc->filename);
- }
- if (NULL != gc->pk)
- GNUNET_CRYPTO_ecc_key_free (gc->pk);
- GNUNET_free (gc);
-}
-
-
-/**
- * Task called upon shutdown or process termination of 'gnunet-ecc' during
- * ECC key generation. Check where we are and perform the appropriate
- * action.
- *
- * @param cls the 'struct GNUNET_CRYPTO_EccKeyGenerationContext'
- * @param tc scheduler context
- */
-static void
-check_key_generation_completion (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_CRYPTO_EccKeyGenerationContext *gc = cls;
- struct GNUNET_CRYPTO_EccPrivateKey *pk;
-
- gc->read_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- {
- gc->cont (gc->cont_cls, NULL, _("interrupted by shutdown"));
- GNUNET_CRYPTO_ecc_key_create_stop (gc);
- return;
- }
- GNUNET_assert (GNUNET_OK ==
- GNUNET_OS_process_wait (gc->gnunet_ecc));
- GNUNET_OS_process_destroy (gc->gnunet_ecc);
- gc->gnunet_ecc = NULL;
- if (NULL == (pk = try_read_key (gc->filename)))
- {
- GNUNET_break (0);
- gc->cont (gc->cont_cls, NULL, _("gnunet-ecc failed"));
- GNUNET_CRYPTO_ecc_key_create_stop (gc);
- return;
- }
- gc->cont (gc->cont_cls, pk, NULL);
- GNUNET_DISK_pipe_close (gc->gnunet_ecc_out);
- GNUNET_free (gc->filename);
- GNUNET_free (gc);
-}
-
-
-/**
- * Return the private ECC key which already existed on disk
- * (asynchronously) to the caller.
- *
- * @param cls the 'struct GNUNET_CRYPTO_EccKeyGenerationContext'
- * @param tc scheduler context (unused)
- */
-static void
-async_return_key (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_CRYPTO_EccKeyGenerationContext *gc = cls;
-
- gc->cont (gc->cont_cls,
- gc->pk,
- NULL);
- GNUNET_free (gc);
-}
-
-
-/**
- * Create a new private key by reading it from a file. If the files
- * does not exist, create a new key and write it to the file. If the
- * contents of the file are invalid the old file is deleted and a
- * fresh key is created.
- *
- * @param filename name of file to use for storage
- * @param cont function to call when done (or on errors)
- * @param cont_cls closure for 'cont'
- * @return handle to abort operation, NULL on fatal errors (cont will not be called if NULL is returned)