-/**
- * Context for advertising a namespace.
- */
-struct AdvertisementContext
-{
- /**
- * Function to call with the result.
- */
- GNUNET_FS_PublishContinuation cont;
-
- /**
- * Closure for cont.
- */
- void *cont_cls;
-
- /**
- * Datastore handle.
- */
- struct GNUNET_DATASTORE_Handle *dsh;
-
- /**
- * Our KSK URI.
- */
- struct GNUNET_FS_Uri *ksk_uri;
-
- /**
- * Plaintext.
- */
- char *pt;
-
- /**
- * NBlock to sign and store.
- */
- struct NBlock *nb;
-
- /**
- * The namespace.
- */
- struct GNUNET_FS_Namespace *ns;
-
- /**
- * Block options.
- */
- struct GNUNET_FS_BlockOptions bo;
-
- /**
- * Number of bytes of plaintext.
- */
- size_t pt_size;
-
- /**
- * Current keyword offset.
- */
- unsigned int pos;
-};
-
-
-/**
- * Disconnect from the datastore.
- *
- * @param cls datastore handle
- * @param tc scheduler context
- */
-static void
-do_disconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_DATASTORE_Handle *dsh = cls;
-
- GNUNET_DATASTORE_disconnect (dsh, GNUNET_NO);
-}
-
-
-/**
- * Continuation called to notify client about result of the
- * operation.
- *
- * @param cls closure (our struct AdvertismentContext)
- * @param success GNUNET_SYSERR on failure
- * @param min_expiration minimum expiration time required for content to be stored
- * @param msg NULL on success, otherwise an error message
- */
-static void
-advertisement_cont (void *cls, int success,
- struct GNUNET_TIME_Absolute min_expiration,
- const char *msg)
-{
- struct AdvertisementContext *ac = cls;
- const char *keyword;
- GNUNET_HashCode key;
- GNUNET_HashCode query;
- struct GNUNET_CRYPTO_AesSessionKey skey;
- struct GNUNET_CRYPTO_AesInitializationVector iv;
- struct GNUNET_CRYPTO_RsaPrivateKey *pk;
-
- if (GNUNET_OK != success)
- {
- /* error! */
- GNUNET_SCHEDULER_add_continuation (&do_disconnect, ac->dsh,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- if (msg == NULL)
- {
- GNUNET_break (0);
- msg = _("Unknown error");
- }
- if (ac->cont != NULL)
- ac->cont (ac->cont_cls, NULL, msg);
- GNUNET_FS_uri_destroy (ac->ksk_uri);
- GNUNET_free (ac->pt);
- GNUNET_free (ac->nb);
- GNUNET_FS_namespace_delete (ac->ns, GNUNET_NO);
- GNUNET_free (ac);
- return;
- }
- if (ac->pos == ac->ksk_uri->data.ksk.keywordCount)
- {
- /* done! */
- GNUNET_SCHEDULER_add_continuation (&do_disconnect, ac->dsh,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- if (ac->cont != NULL)
- ac->cont (ac->cont_cls, ac->ksk_uri, NULL);
- GNUNET_FS_uri_destroy (ac->ksk_uri);
- GNUNET_free (ac->pt);
- GNUNET_free (ac->nb);
- GNUNET_FS_namespace_delete (ac->ns, GNUNET_NO);
- GNUNET_free (ac);
- return;
- }
- keyword = ac->ksk_uri->data.ksk.keywords[ac->pos++];
- /* first character of keyword indicates if it is
- * mandatory or not -- ignore for hashing */
- GNUNET_CRYPTO_hash (&keyword[1], strlen (&keyword[1]), &key);
- GNUNET_CRYPTO_hash_to_aes_key (&key, &skey, &iv);
- GNUNET_CRYPTO_aes_encrypt (ac->pt, ac->pt_size, &skey, &iv, &ac->nb[1]);
- GNUNET_break (GNUNET_OK ==
- GNUNET_CRYPTO_rsa_sign (ac->ns->key, &ac->nb->ns_purpose,
- &ac->nb->ns_signature));
- pk = GNUNET_CRYPTO_rsa_key_create_from_hash (&key);
- GNUNET_assert (pk != NULL);
- GNUNET_CRYPTO_rsa_key_get_public (pk, &ac->nb->keyspace);
- GNUNET_CRYPTO_hash (&ac->nb->keyspace,
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- &query);
- GNUNET_break (GNUNET_OK ==
- GNUNET_CRYPTO_rsa_sign (pk, &ac->nb->ksk_purpose,
- &ac->nb->ksk_signature));
- GNUNET_CRYPTO_rsa_key_free (pk);
- GNUNET_DATASTORE_put (ac->dsh, 0 /* no reservation */ ,
- &query, ac->pt_size + sizeof (struct NBlock), ac->nb,
- GNUNET_BLOCK_TYPE_FS_NBLOCK, ac->bo.content_priority,
- ac->bo.anonymity_level, ac->bo.replication_level,
- ac->bo.expiration_time, -2, 1,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT, &advertisement_cont,
- ac);
-}
-
-
-/**
- * Publish an advertismement for a namespace.
- *
- * @param h handle to the file sharing subsystem
- * @param ksk_uri keywords to use for advertisment
- * @param namespace handle for the namespace that should be advertised
- * @param meta meta-data for the namespace advertisement
- * @param bo block options
- * @param rootEntry name of the root of the namespace
- * @param cont continuation
- * @param cont_cls closure for cont
- */
-void
-GNUNET_FS_namespace_advertise (struct GNUNET_FS_Handle *h,
- struct GNUNET_FS_Uri *ksk_uri,
- struct GNUNET_FS_Namespace *namespace,
- const struct GNUNET_CONTAINER_MetaData *meta,
- const struct GNUNET_FS_BlockOptions *bo,
- const char *rootEntry,
- GNUNET_FS_PublishContinuation cont,
- void *cont_cls)
-{
- size_t reslen;
- size_t size;
- ssize_t mdsize;
- struct NBlock *nb;
- char *mdst;
- struct GNUNET_DATASTORE_Handle *dsh;
- struct AdvertisementContext *ctx;
- char *pt;
-
- /* create advertisements */
- mdsize = GNUNET_CONTAINER_meta_data_get_serialized_size (meta);
- if (-1 == mdsize)
- {
- cont (cont_cls, NULL, _("Failed to serialize meta data"));
- return;
- }
- reslen = strlen (rootEntry) + 1;
- size = mdsize + sizeof (struct NBlock) + reslen;
- if (size > MAX_NBLOCK_SIZE)
- {
- size = MAX_NBLOCK_SIZE;
- mdsize = size - sizeof (struct NBlock) - reslen;
- }
-
- pt = GNUNET_malloc (mdsize + reslen);
- memcpy (pt, rootEntry, reslen);
- mdst = &pt[reslen];
- mdsize =
- GNUNET_CONTAINER_meta_data_serialize (meta, &mdst, mdsize,
- GNUNET_CONTAINER_META_DATA_SERIALIZE_PART);
- if (mdsize == -1)
- {
- GNUNET_break (0);
- GNUNET_free (pt);
- cont (cont_cls, NULL, _("Failed to serialize meta data"));
- return;
- }
- size = mdsize + sizeof (struct NBlock) + reslen;
- nb = GNUNET_malloc (size);
- GNUNET_CRYPTO_rsa_key_get_public (namespace->key, &nb->subspace);
- nb->ns_purpose.size =
- htonl (mdsize + reslen +
- sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- nb->ns_purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK);
- nb->ksk_purpose.size =
- htonl (size - sizeof (struct GNUNET_CRYPTO_RsaSignature));
- nb->ksk_purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK_KSIG);
- dsh = GNUNET_DATASTORE_connect (h->cfg);
- if (NULL == dsh)
- {
- GNUNET_free (nb);
- GNUNET_free (pt);
- cont (cont_cls, NULL, _("Failed to connect to datastore service"));
- return;
- }
- ctx = GNUNET_malloc (sizeof (struct AdvertisementContext));
- ctx->cont = cont;
- ctx->cont_cls = cont_cls;
- ctx->dsh = dsh;
- ctx->ksk_uri = GNUNET_FS_uri_dup (ksk_uri);
- ctx->nb = nb;
- ctx->pt = pt;
- ctx->pt_size = mdsize + reslen;
- ctx->ns = namespace;
- ctx->ns->rc++;
- ctx->bo = *bo;
- advertisement_cont (ctx, GNUNET_OK, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
-}