/**
* Continuation of "GNUNET_FS_publish_ksk" that performs the actual
* publishing operation (iterating over all of the keywords).
*
* @param cls closure of type "struct GNUNET_FS_PublishKskContext*"
* @param tc unused
*/
static void
publish_ksk_cont (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_FS_PublishKskContext *pkc = 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;
pkc->ksk_task = GNUNET_SCHEDULER_NO_TASK;
if ((pkc->i == pkc->ksk_uri->data.ksk.keywordCount) || (NULL == pkc->dsh))
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "KSK PUT operation complete\n");
pkc->cont (pkc->cont_cls, pkc->ksk_uri, NULL);
GNUNET_FS_publish_ksk_cancel (pkc);
return;
}
keyword = pkc->ksk_uri->data.ksk.keywords[pkc->i++];
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Publishing under keyword `%s'\n",
&keyword[1]);
/* 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 (&pkc->kb[1], pkc->slen + pkc->mdsize, &skey, &iv,
&pkc->cpy[1]);
pk = GNUNET_CRYPTO_rsa_key_create_from_hash (&key);
GNUNET_assert (NULL != pk);
GNUNET_CRYPTO_rsa_key_get_public (pk, &pkc->cpy->keyspace);
GNUNET_CRYPTO_hash (&pkc->cpy->keyspace,
sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
&query);
GNUNET_assert (GNUNET_OK ==
GNUNET_CRYPTO_rsa_sign (pk, &pkc->cpy->purpose,
&pkc->cpy->signature));
GNUNET_CRYPTO_rsa_key_free (pk);
pkc->qre =
GNUNET_DATASTORE_put (pkc->dsh, 0, &query,
pkc->mdsize + sizeof (struct KBlock) + pkc->slen,
pkc->cpy, GNUNET_BLOCK_TYPE_FS_KBLOCK,
pkc->bo.content_priority, pkc->bo.anonymity_level,
pkc->bo.replication_level, pkc->bo.expiration_time,
-2, 1, GNUNET_CONSTANTS_SERVICE_TIMEOUT,
&kb_put_cont, pkc);
}
/**
* We've received an on-demand encoded block from the datastore.
* Attempt to do on-demand encoding and (if successful), call the
* continuation with the resulting block. On error, clean up and ask
* the datastore for more results.
*
* @param key key for the content
* @param size number of bytes in data
* @param data content stored
* @param type type of the content
* @param priority priority of the content
* @param anonymity anonymity-level for the content
* @param expiration expiration time for the content
* @param uid unique identifier for the datum;
* maybe 0 if no unique identifier is available
* @param cont function to call with the actual block (at most once, on success)
* @param cont_cls closure for cont
* @return GNUNET_OK on success
*/
int
GNUNET_FS_handle_on_demand_block (const struct GNUNET_HashCode * key, uint32_t size,
const void *data, enum GNUNET_BLOCK_Type type,
uint32_t priority, uint32_t anonymity,
struct GNUNET_TIME_Absolute expiration,
uint64_t uid,
GNUNET_DATASTORE_DatumProcessor cont,
void *cont_cls)
{
const struct OnDemandBlock *odb;
struct GNUNET_HashCode nkey;
struct GNUNET_CRYPTO_AesSessionKey skey;
struct GNUNET_CRYPTO_AesInitializationVector iv;
struct GNUNET_HashCode query;
ssize_t nsize;
char ndata[DBLOCK_SIZE];
char edata[DBLOCK_SIZE];
const char *fn;
struct GNUNET_DISK_FileHandle *fh;
uint64_t off;
struct IndexInfo *ii;
if (size != sizeof (struct OnDemandBlock))
{
GNUNET_break (0);
GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1,
GNUNET_TIME_UNIT_FOREVER_REL, &remove_cont, NULL);
return GNUNET_SYSERR;
}
odb = (const struct OnDemandBlock *) data;
off = GNUNET_ntohll (odb->offset);
ii = GNUNET_CONTAINER_multihashmap_get (ifm, &odb->file_id);
if (NULL == ii)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
fn = ii->filename;
if ((NULL == fn) || (0 != ACCESS (fn, R_OK)))
{
GNUNET_STATISTICS_update (GSF_stats,
gettext_noop
("# index blocks removed: original file inaccessible"),
1, GNUNET_YES);
GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1,
GNUNET_TIME_UNIT_FOREVER_REL, &remove_cont, NULL);
return GNUNET_SYSERR;
}
if ((NULL ==
(fh =
GNUNET_DISK_file_open (fn, GNUNET_DISK_OPEN_READ,
GNUNET_DISK_PERM_NONE))) ||
(off != GNUNET_DISK_file_seek (fh, off, GNUNET_DISK_SEEK_SET)) ||
(-1 == (nsize = GNUNET_DISK_file_read (fh, ndata, sizeof (ndata)))))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_
("Could not access indexed file `%s' (%s) at offset %llu: %s\n"),
GNUNET_h2s (&odb->file_id), fn, (unsigned long long) off,
(fn == NULL) ? _("not indexed") : STRERROR (errno));
if (fh != NULL)
GNUNET_DISK_file_close (fh);
GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1,
GNUNET_TIME_UNIT_FOREVER_REL, &remove_cont, NULL);
return GNUNET_SYSERR;
}
GNUNET_DISK_file_close (fh);
GNUNET_CRYPTO_hash (ndata, nsize, &nkey);
GNUNET_CRYPTO_hash_to_aes_key (&nkey, &skey, &iv);
GNUNET_CRYPTO_aes_encrypt (ndata, nsize, &skey, &iv, edata);
GNUNET_CRYPTO_hash (edata, nsize, &query);
if (0 != memcmp (&query, key, sizeof (struct GNUNET_HashCode)))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Indexed file `%s' changed at offset %llu\n"), fn,
(unsigned long long) off);
GNUNET_DATASTORE_remove (dsh, key, size, data, -1, -1,
GNUNET_TIME_UNIT_FOREVER_REL, &remove_cont, NULL);
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"On-demand encoded block for query `%s'\n", GNUNET_h2s (key));
cont (cont_cls, key, nsize, edata, GNUNET_BLOCK_TYPE_FS_DBLOCK, priority,
anonymity, expiration, uid);
return GNUNET_OK;
}
