/*
This file is part of GNUnet
- (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
+ (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
* @author Christian Grothoff
*/
#include "platform.h"
+#include "gnunet_constants.h"
+#include "gnunet_signatures.h"
+#include "gnunet_util_lib.h"
#include "gnunet_fs_service.h"
-
+#include "fs.h"
/**
- * Publish an advertismement for a namespace.
+ * Return the name of the directory in which we store
+ * our local namespaces (or rather, their public keys).
*
- * @param h handle to the file sharing subsystem
- * @param namespace handle for the namespace that should be advertised
- * @param meta meta-data for the namespace advertisement
- * @param anonymity for the namespace advertismement
- * @param priority for the namespace advertisement
- * @param expiration for the namespace advertisement
- * @param advertisementURI the keyword (!) URI to advertise the
- * namespace under (we will create a GNUNET_EC_KNBlock)
- * @param rootEntry name of the root entry in the namespace (for
- * the namespace advertisement)
- *
- * @return uri of the advertisement
+ * @param h global fs handle
+ * @return NULL on error, otherwise the name of the directory
*/
-struct GNUNET_FS_Uri *
-GNUNET_FS_namespace_advertise (struct GNUNET_FS_Handle *h,
- struct GNUNET_FS_Namespace *namespace,
- const struct GNUNET_MetaData *meta,
- unsigned int anonymity,
- unsigned int priority,
- struct GNUNET_TIME_Absolute expiration,
- const struct GNUNET_FS_Uri *advertisementURI,
- const char *rootEntry)
+static char *
+get_namespace_directory (struct GNUNET_FS_Handle *h)
{
- return NULL;
-}
-
+ char *dn;
-/**
- * Create a namespace with the given name; if one already
- * exists, return a handle to the existing namespace.
- *
- * @param h handle to the file sharing subsystem
- * @param name name to use for the namespace
- * @return handle to the namespace, NULL on error
- */
-struct GNUNET_FS_Namespace *
-GNUNET_FS_namespace_create (struct GNUNET_FS_Handle *h,
- const char *name)
-{
- return NULL;
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (h->cfg,
+ "FS",
+ "IDENTITY_DIR",
+ &dn))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Configuration fails to specify `%s' in section `%s'\n"),
+ "IDENTITY_DIR",
+ "fs");
+ return NULL;
+ }
+ return dn;
}
/**
- * Delete a namespace handle. Can be used for a clean shutdown (free
- * memory) or also to freeze the namespace to prevent further
- * insertions by anyone.
- *
- * @param namespace handle to the namespace that should be deleted / freed
- * @param freeze prevents future insertions; creating a namespace
- * with the same name again will create a fresh namespace instead
- *
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * Context for advertising a namespace.
*/
-int
-GNUNET_FS_namespace_delete (struct GNUNET_FS_Namespace *namespace,
- int freeze)
+struct AdvertisementContext
{
- return GNUNET_SYSERR;
-}
+ /**
+ * Function to call with the result.
+ */
+ GNUNET_FS_PublishContinuation cont;
+
+ /**
+ * Closure for cont.
+ */
+ void *cont_cls;
+
+ /**
+ * Datastore handle.
+ */
+ struct GNUNET_DATASTORE_Handle *dsh;
+
+ /**
+ * Our scheduler.
+ */
+ struct GNUNET_SCHEDULER_Handle *sched;
+
+ /**
+ * 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;
+
+ /**
+ * Expiration time.
+ */
+ struct GNUNET_TIME_Absolute expiration;
+
+ /**
+ * Number of bytes of plaintext.
+ */
+ size_t pt_size;
+
+ /**
+ * Anonymity level.
+ */
+ uint32_t anonymity;
+
+ /**
+ * Content priority.
+ */
+ uint32_t priority;
+
+ /**
+ * Current keyword offset.
+ */
+ unsigned int pos;
+};
/**
- * Build a list of all available local (!) namespaces The returned
- * names are only the nicknames since we only iterate over the local
- * namespaces.
- *
- * @param h handle to the file sharing subsystem
- * @param cb function to call on each known namespace
- * @param cb_cls closure for cb
+ * Disconnect from the datastore.
+ *
+ * @param cls datastore handle
+ * @param tc scheduler context
*/
-void
-GNUNET_FS_namespace_list (struct GNUNET_FS_Handle *h,
- GNUNET_FS_NamespaceInfoProcessor cb,
- void *cb_cls)
+static void
+do_disconnect (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
-}
-
-/* end of fs_namespace.c */
-
-#if 0
-/*
- This file is part of GNUnet
- (C) 2004, 2005, 2006 Christian Grothoff (and other contributing authors)
-
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
- option) any later version.
-
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-*/
+ struct GNUNET_DATASTORE_Handle *dsh = cls;
-/**
- * @file applications/fs/ecrs/namespace.c
- * @brief creation, deletion and advertising of namespaces
- * @author Christian Grothoff
- */
-
-#include "platform.h"
-#include "gnunet_directories.h"
-#include "gnunet_protocols.h"
-#include "gnunet_ecrs_lib.h"
-#include "gnunet_fs_lib.h"
-#include "ecrs_core.h"
-#include "ecrs.h"
-
-#define PSEUDODIR "data/namespace/keys/"
-#define INITVALUE "GNUnet!!"
-#define MAX_SBLOCK_SIZE 32000
-
-static char *
-getPseudonymFileName (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
-{
- char *gnHome;
- char *fileName;
- GNUNET_EncName enc;
-
- GNUNET_GC_get_configuration_value_filename (cfg,
- "GNUNET",
- "GNUNET_HOME",
- GNUNET_DEFAULT_HOME_DIRECTORY,
- &fileName);
- gnHome = GNUNET_expand_file_name (ectx, fileName);
- GNUNET_free (fileName);
- fileName =
- GNUNET_malloc (strlen (gnHome) + strlen (PSEUDODIR) +
- sizeof (GNUNET_EncName) + 2);
- strcpy (fileName, gnHome);
- GNUNET_free (gnHome);
- strcat (fileName, DIR_SEPARATOR_STR);
- strcat (fileName, PSEUDODIR);
- GNUNET_disk_directory_create (ectx, fileName);
- if (pid != NULL)
- {
- GNUNET_hash_to_enc (pid, &enc);
- strcat (fileName, (char *) &enc);
- }
- return fileName;
+ GNUNET_DATASTORE_disconnect (dsh,
+ GNUNET_NO);
}
/**
- * Check if the given namespace exists (locally).
+ * Continuation called to notify client about result of the
+ * operation.
*
- * @return GNUNET_OK if the namespace exists, GNUNET_SYSERR if not
+ * @param cls closure (our struct AdvertismentContext)
+ * @param success GNUNET_SYSERR on failure
+ * @param msg NULL on success, otherwise an error message
*/
-int
-GNUNET_ECRS_namespace_test_exists (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
+static void
+advertisement_cont (void *cls,
+ int success,
+ const char *msg)
{
- char *fileName;
- int ret;
-
- fileName = getPseudonymFileName (ectx, cfg, pid);
- ret = GNUNET_disk_file_test (ectx, fileName);
- GNUNET_free (fileName);
- return ret;
-}
-
-/**
- * Delete a local namespace.
- *
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
- */
-int
-GNUNET_ECRS_namespace_delete (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
-{
- char *fileName;
-
- fileName = getPseudonymFileName (ectx, cfg, pid);
- if (GNUNET_YES != GNUNET_disk_file_test (ectx, fileName))
+ 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)
{
- GNUNET_free (fileName);
- return GNUNET_SYSERR; /* no such namespace */
+ /* error! */
+ GNUNET_SCHEDULER_add_continuation (ac->sched,
+ &do_disconnect,
+ ac->dsh,
+ GNUNET_SCHEDULER_REASON_PREREQ_DONE);
+ 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 (0 != UNLINK (fileName))
+ if (ac->pos == ac->ksk_uri->data.ksk.keywordCount)
{
- GNUNET_GE_LOG_STRERROR_FILE (ectx,
- GNUNET_GE_WARNING | GNUNET_GE_USER |
- GNUNET_GE_BULK, "unlink", fileName);
- GNUNET_free (fileName);
- return GNUNET_SYSERR;
+ /* done! */
+ GNUNET_SCHEDULER_add_continuation (ac->sched,
+ &do_disconnect,
+ ac->dsh,
+ GNUNET_SCHEDULER_REASON_PREREQ_DONE);
+ 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;
}
- GNUNET_free (fileName);
- return GNUNET_OK;
+ 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_NBLOCK,
+ ac->priority,
+ ac->anonymity,
+ ac->expiration,
+ -2, 1,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ &advertisement_cont,
+ ac);
}
-/**
- * Write the private key of the namespace to a file.
- */
-static int
-write_namespace_key (struct GNUNET_GC_Configuration *cfg,
- const struct GNUNET_RSA_PrivateKey *key)
-{
- GNUNET_RSA_PrivateKeyEncoded *namespace_priv_key_encoded;
- char *fileName;
- GNUNET_RSA_PublicKey pubk;
- GNUNET_HashCode pid;
-
- GNUNET_RSA_get_public_key (key, &pubk);
- GNUNET_hash (&pubk, sizeof (GNUNET_RSA_PublicKey), &pid);
- fileName = getPseudonymFileName (NULL, cfg, &pid);
- if (GNUNET_YES == GNUNET_disk_file_test (NULL, fileName))
- {
- GNUNET_GE_BREAK (NULL, 0); /* hash collision!? */
- GNUNET_free (fileName);
- return GNUNET_SYSERR;
- }
- namespace_priv_key_encoded = GNUNET_RSA_encode_key (key);
- GNUNET_disk_file_write (NULL, fileName,
- (const char *) namespace_priv_key_encoded,
- ntohs (namespace_priv_key_encoded->len), "600");
- GNUNET_free (fileName);
- GNUNET_free (namespace_priv_key_encoded);
- return GNUNET_OK;
-}
/**
- * Create a new namespace (and publish an advertismement).
- * This publishes both an GNUNET_EC_NBlock in the namespace itself
- * as well as KNBlocks under all keywords specified in
- * the advertisementURI.
+ * Publish an advertismement for a namespace.
*
- * @param anonymity_level for the namespace advertismement
+ * @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 anonymity for the namespace advertismement
* @param priority for the namespace advertisement
* @param expiration for the namespace advertisement
- * @param advertisementURI the keyword (!) URI to advertise the
- * namespace under (GNUNET_EC_KNBlock)
- * @param meta meta-data for the namespace advertisement
- * (will be used to derive a name)
- * @param rootEntry name of the root entry in the namespace (for
- * the namespace advertisement)
- * @param rootURI set to the URI of the namespace, NULL if
- * no advertisement was created
- *
- * @return URI on success, NULL on error
+ * @param rootEntry name of the root of the namespace
+ * @param cont continuation
+ * @param cont_cls closure for cont
*/
-struct GNUNET_ECRS_URI *
-GNUNET_ECRS_namespace_create (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const struct GNUNET_MetaData *meta,
- unsigned int anonymityLevel,
- unsigned int priority,
- GNUNET_CronTime expiration,
- const struct GNUNET_ECRS_URI *advertisementURI,
- const char *rootEntry)
+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,
+ uint32_t anonymity,
+ uint32_t priority,
+ struct GNUNET_TIME_Absolute expiration,
+ const char *rootEntry,
+ GNUNET_FS_PublishContinuation cont,
+ void *cont_cls)
{
- struct GNUNET_ECRS_URI *rootURI;
- struct GNUNET_RSA_PrivateKey *namespace_priv_key;
- GNUNET_HashCode hc;
- struct GNUNET_ClientServerConnection *sock;
- GNUNET_DatastoreValue *value;
- GNUNET_DatastoreValue *knvalue;
- unsigned int size;
- unsigned int mdsize;
- struct GNUNET_RSA_PrivateKey *pk;
- GNUNET_EC_SBlock *sb;
- GNUNET_EC_KSBlock *ksb;
- char **keywords;
- const char *keyword;
- unsigned int keywordCount;
- int i;
- char *cpy;
- char *rtgt;
+ size_t reslen;
+ size_t size;
+ ssize_t mdsize;
+ struct NBlock *nb;
+ char *mdst;
+ struct GNUNET_DATASTORE_Handle *dsh;
+ struct AdvertisementContext *ctx;
+ char *pt;
- if ((advertisementURI != NULL)
- && (!GNUNET_ECRS_uri_test_ksk (advertisementURI)))
+ /* create advertisements */
+ mdsize = GNUNET_CONTAINER_meta_data_get_serialized_size (meta);
+ if (-1 == mdsize)
{
- GNUNET_GE_BREAK (ectx, 0);
- return NULL;
+ cont (cont_cls, NULL, _("Failed to serialize meta data"));
+ return;
}
- namespace_priv_key = GNUNET_RSA_create_key ();
- if (GNUNET_OK != write_namespace_key (cfg, namespace_priv_key))
+ reslen = strlen (rootEntry) + 1;
+ size = mdsize + sizeof (struct NBlock) + reslen;
+ if (size > MAX_NBLOCK_SIZE)
{
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
+ size = MAX_NBLOCK_SIZE;
+ mdsize = size - sizeof (struct NBlock) - reslen;
}
- /* create advertisements */
- mdsize = GNUNET_meta_data_get_serialized_size (meta, GNUNET_SERIALIZE_PART);
- size = mdsize + sizeof (GNUNET_EC_SBlock) + strlen (rootEntry) + 2;
- if (size > MAX_SBLOCK_SIZE)
- {
- size = MAX_SBLOCK_SIZE;
- mdsize = size - sizeof (GNUNET_EC_SBlock) - strlen (rootEntry) - 2;
- }
- value = GNUNET_malloc (sizeof (GNUNET_DatastoreValue) + size);
- memset (value, 0, sizeof (GNUNET_DatastoreValue) + size);
- sb = (GNUNET_EC_SBlock *) & value[1];
- sb->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- GNUNET_RSA_get_public_key (namespace_priv_key, &sb->subspace);
- rtgt = (char *) &sb[1];
- memcpy (rtgt, rootEntry, strlen (rootEntry) + 1);
- mdsize = GNUNET_meta_data_serialize (ectx,
- meta,
- &rtgt[strlen (rootEntry) + 2],
- mdsize, GNUNET_SERIALIZE_PART);
+ 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_GE_BREAK (ectx, 0);
- GNUNET_RSA_free_key (namespace_priv_key);
- GNUNET_free (value);
- return NULL;
- }
- size = mdsize + sizeof (GNUNET_EC_SBlock) + strlen (rootEntry) + 2;
- GNUNET_GE_ASSERT (ectx,
- GNUNET_OK == GNUNET_RSA_sign (namespace_priv_key,
- size
- -
- sizeof
- (GNUNET_RSA_Signature) -
- sizeof
- (GNUNET_RSA_PublicKey) -
- sizeof (unsigned int),
- &sb->identifier,
- &sb->signature));
- value->size = htonl (sizeof (GNUNET_DatastoreValue) + size);
- value->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- value->priority = htonl (priority);
- value->anonymity_level = htonl (anonymityLevel);
- value->expiration_time = GNUNET_htonll (expiration);
- sock = GNUNET_client_connection_create (ectx, cfg);
- if (sock == NULL)
- {
- GNUNET_free (value);
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
+ GNUNET_break (0);
+ GNUNET_free (pt);
+ cont (cont_cls, NULL, _("Failed to serialize meta data"));
+ return;
}
- if (GNUNET_OK != GNUNET_FS_insert (sock, value))
+ 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, h->sched);
+ if (NULL == dsh)
{
- GNUNET_free (value);
- GNUNET_client_connection_destroy (sock);
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
- }
-
-
- /* publish KNBlocks */
- size += sizeof (GNUNET_EC_KSBlock) - sizeof (GNUNET_EC_SBlock);
- knvalue = GNUNET_malloc (sizeof (GNUNET_DatastoreValue) + size);
- *knvalue = *value;
- knvalue->type = htonl (GNUNET_ECRS_BLOCKTYPE_KEYWORD_SIGNED);
- knvalue->size = htonl (sizeof (GNUNET_DatastoreValue) + size);
- ksb = (GNUNET_EC_KSBlock *) & knvalue[1];
- ksb->type = htonl (GNUNET_ECRS_BLOCKTYPE_KEYWORD_SIGNED);
- memcpy (&ksb->sblock,
- sb, sizeof (GNUNET_EC_SBlock) + mdsize + strlen (rootEntry) + 2);
-
- if (advertisementURI != NULL)
- {
- keywords = advertisementURI->data.ksk.keywords;
- keywordCount = advertisementURI->data.ksk.keywordCount;
- cpy =
- GNUNET_malloc (size - sizeof (GNUNET_EC_KBlock) -
- sizeof (unsigned int));
- memcpy (cpy,
- &ksb->sblock,
- size - sizeof (GNUNET_EC_KBlock) - sizeof (unsigned int));
- for (i = 0; i < keywordCount; i++)
- {
- keyword = keywords[i];
- /* first character of keyword indicates
- mandatory or not -- ignore for hashing! */
- GNUNET_hash (&keyword[1], strlen (&keyword[1]), &hc);
- pk = GNUNET_RSA_create_key_from_hash (&hc);
- GNUNET_RSA_get_public_key (pk, &ksb->kblock.keyspace);
- GNUNET_GE_ASSERT (ectx,
- size - sizeof (GNUNET_EC_KBlock) -
- sizeof (unsigned int) ==
- sizeof (GNUNET_EC_SBlock) + mdsize +
- strlen (rootEntry) + 2);
- GNUNET_ECRS_encryptInPlace (&hc, &ksb->sblock,
- size - sizeof (GNUNET_EC_KBlock) -
- sizeof (unsigned int));
-
- GNUNET_GE_ASSERT (ectx,
- GNUNET_OK == GNUNET_RSA_sign (pk,
- size -
- sizeof
- (GNUNET_EC_KBlock) -
- sizeof (unsigned
- int),
- &ksb->sblock,
- &ksb->
- kblock.signature));
- /* extra check: verify sig */
- GNUNET_RSA_free_key (pk);
- if (GNUNET_OK != GNUNET_FS_insert (sock, knvalue))
- {
- GNUNET_GE_BREAK (ectx, 0);
- GNUNET_free (cpy);
- GNUNET_free (knvalue);
- GNUNET_free (value);
- GNUNET_client_connection_destroy (sock);
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
- }
- /* restore nblock to avoid re-encryption! */
- memcpy (&ksb->sblock,
- cpy,
- size - sizeof (GNUNET_EC_KBlock) - sizeof (unsigned int));
- }
- GNUNET_free (cpy);
- }
- rootURI = GNUNET_malloc (sizeof (URI));
- rootURI->type = sks;
- GNUNET_hash (&sb->subspace,
- sizeof (GNUNET_RSA_PublicKey), &rootURI->data.sks.namespace);
- rootURI->data.sks.identifier = GNUNET_strdup (rootEntry);
- GNUNET_free (knvalue);
- GNUNET_free (value);
- GNUNET_client_connection_destroy (sock);
- GNUNET_RSA_free_key (namespace_priv_key);
-
- return rootURI;
+ 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->sched = h->sched;
+ 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->anonymity = anonymity;
+ ctx->priority = priority;
+ ctx->expiration = expiration;
+ advertisement_cont (ctx, GNUNET_OK, NULL);
}
-static struct GNUNET_RSA_PrivateKey *
-read_namespace_key (struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
+
+/**
+ * Create a namespace with the given name; if one already
+ * exists, return a handle to the existing namespace.
+ *
+ * @param h handle to the file sharing subsystem
+ * @param name name to use for the namespace
+ * @return handle to the namespace, NULL on error
+ */
+struct GNUNET_FS_Namespace *
+GNUNET_FS_namespace_create (struct GNUNET_FS_Handle *h,
+ const char *name)
{
- char *fileName;
- GNUNET_RSA_PrivateKeyEncoded *hke;
- struct GNUNET_RSA_PrivateKey *hk;
- char *dst;
- unsigned long long len;
-
- fileName = getPseudonymFileName (NULL, cfg, pid);
- if (GNUNET_OK != GNUNET_disk_file_size (NULL, fileName, &len, GNUNET_YES))
- {
- GNUNET_free (fileName);
- return NULL;
- }
- if (len < 2)
- {
- GNUNET_GE_LOG (NULL, GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("File `%s' does not contain a pseudonym.\n"),
- fileName);
- GNUNET_free (fileName);
- return NULL;
- }
- dst = GNUNET_malloc (len);
- len = GNUNET_disk_file_read (NULL, fileName, len, dst);
- hke = (GNUNET_RSA_PrivateKeyEncoded *) dst;
- if (ntohs (hke->len) != len)
+ char *dn;
+ char *fn;
+ struct GNUNET_FS_Namespace *ret;
+
+ dn = get_namespace_directory (h);
+ GNUNET_asprintf (&fn,
+ "%s%s%s",
+ dn,
+ DIR_SEPARATOR_STR,
+ name);
+ GNUNET_free (dn);
+ ret = GNUNET_malloc (sizeof (struct GNUNET_FS_Namespace));
+ ret->rc = 1;
+ ret->key = GNUNET_CRYPTO_rsa_key_create_from_file (fn);
+ if (ret->key == NULL)
{
- GNUNET_GE_LOG (NULL, GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of pseudonym `%s' is invalid.\n"), fileName);
- GNUNET_free (fileName);
- GNUNET_free (hke);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to create or read private key for namespace `%s'\n"),
+ name);
+ GNUNET_free (ret);
+ GNUNET_free (fn);
return NULL;
}
- GNUNET_free (fileName);
- hk = GNUNET_RSA_decode_key (hke);
- GNUNET_free (hke);
- return hk;
+ ret->name = GNUNET_strdup (name);
+ ret->filename = fn;
+ return ret;
}
/**
- * Add an entry into a namespace.
+ * Delete a namespace handle. Can be used for a clean shutdown (free
+ * memory) or also to freeze the namespace to prevent further
+ * insertions by anyone.
+ *
+ * @param namespace handle to the namespace that should be deleted / freed
+ * @param freeze prevents future insertions; creating a namespace
+ * with the same name again will create a fresh namespace instead
*
- * @param dstU to which URI should the namespace entry refer?
- * @param md what meta-data should be associated with the
- * entry?
- * @param thisId name of this entry in the namespace (keyword/identifier)
- * @param nextId name of the update for this entry (to be published in
- * the future; maybe NULL)
- * @param pid unique identifier of the namespace/pseudonym
- * @return URI on success, NULL on error
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
*/
-struct GNUNET_ECRS_URI *
-GNUNET_ECRS_namespace_add_content (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid,
- unsigned int anonymityLevel,
- unsigned int priority,
- GNUNET_CronTime expiration,
- const char *thisId,
- const char *nextId,
- const struct GNUNET_ECRS_URI *dstU,
- const struct GNUNET_MetaData *md)
+int
+GNUNET_FS_namespace_delete (struct GNUNET_FS_Namespace *namespace,
+ int freeze)
{
- struct GNUNET_ECRS_URI *uri;
- struct GNUNET_ClientServerConnection *sock;
- GNUNET_DatastoreValue *value;
- unsigned int size;
- unsigned int mdsize;
- struct GNUNET_RSA_PrivateKey *hk;
- GNUNET_EC_SBlock *sb;
- char *dstURI;
- char *destPos;
- GNUNET_HashCode hc; /* hash of thisId = key */
- GNUNET_HashCode hc2; /* hash of hc = identifier */
- int ret;
- unsigned int nidlen;
-
- hk = read_namespace_key (cfg, pid);
- if (hk == NULL)
- return NULL;
-
- /* THEN: construct GNUNET_EC_SBlock */
- dstURI = GNUNET_ECRS_uri_to_string (dstU);
- mdsize = GNUNET_meta_data_get_serialized_size (md, GNUNET_SERIALIZE_PART);
- if (nextId == NULL)
- nextId = "";
- nidlen = strlen (nextId) + 1;
- size = mdsize + sizeof (GNUNET_EC_SBlock) + strlen (dstURI) + 1 + nidlen;
- if (size > MAX_SBLOCK_SIZE)
- {
- size = MAX_SBLOCK_SIZE;
- mdsize =
- size - (sizeof (GNUNET_EC_SBlock) + strlen (dstURI) + 1 + nidlen);
- }
- value = GNUNET_malloc (sizeof (GNUNET_DatastoreValue) + size);
- sb = (GNUNET_EC_SBlock *) & value[1];
- sb->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- destPos = (char *) &sb[1];
- memcpy (destPos, nextId, nidlen);
- destPos += nidlen;
- memcpy (destPos, dstURI, strlen (dstURI) + 1);
- destPos += strlen (dstURI) + 1;
- mdsize = GNUNET_meta_data_serialize (ectx,
- md,
- destPos,
- mdsize, GNUNET_SERIALIZE_PART);
- if (mdsize == -1)
+ namespace->rc--;
+ if (freeze)
{
- GNUNET_GE_BREAK (ectx, 0);
- GNUNET_free (dstURI);
- GNUNET_RSA_free_key (hk);
- GNUNET_free (value);
- return NULL;
+ if (0 != UNLINK (namespace->filename))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
+ "unlink",
+ namespace->filename);
}
- size = sizeof (GNUNET_EC_SBlock) + mdsize + strlen (dstURI) + 1 + nidlen;
- value->size = htonl (sizeof (GNUNET_DatastoreValue) + size);
- value->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- value->priority = htonl (priority);
- value->anonymity_level = htonl (anonymityLevel);
- value->expiration_time = GNUNET_htonll (expiration);
- GNUNET_hash (thisId, strlen (thisId), &hc);
- GNUNET_hash (&hc, sizeof (GNUNET_HashCode), &hc2);
- uri = GNUNET_malloc (sizeof (URI));
- uri->type = sks;
- GNUNET_RSA_get_public_key (hk, &sb->subspace);
- GNUNET_hash (&sb->subspace,
- sizeof (GNUNET_RSA_PublicKey), &uri->data.sks.namespace);
- GNUNET_GE_BREAK (ectx, 0 == memcmp (&uri->data.sks.namespace,
- pid, sizeof (GNUNET_HashCode)));
- uri->data.sks.identifier = GNUNET_strdup (thisId);
- GNUNET_hash_xor (&hc2, &uri->data.sks.namespace, &sb->identifier);
- GNUNET_ECRS_encryptInPlace (&hc, &sb[1], size - sizeof (GNUNET_EC_SBlock));
- GNUNET_GE_ASSERT (ectx,
- GNUNET_OK == GNUNET_RSA_sign (hk,
- size
- -
- sizeof
- (GNUNET_RSA_Signature) -
- sizeof
- (GNUNET_RSA_PublicKey) -
- sizeof (unsigned int),
- &sb->identifier,
- &sb->signature));
- GNUNET_RSA_free_key (hk);
- sock = GNUNET_client_connection_create (ectx, cfg);
- ret = GNUNET_FS_insert (sock, value);
- if (ret != GNUNET_OK)
+ if (0 == namespace->rc)
{
- GNUNET_free (uri);
- uri = NULL;
+ GNUNET_CRYPTO_rsa_key_free (namespace->key);
+ GNUNET_free (namespace->filename);
+ GNUNET_free (namespace->name);
+ GNUNET_free (namespace);
}
- GNUNET_client_connection_destroy (sock);
- GNUNET_free (value);
- GNUNET_free (dstURI);
-
- return uri;
+ return GNUNET_OK;
}
-struct lNCLS
+
+/**
+ * Context for the 'process_namespace' callback.
+ * Specifies a function to call on each namespace.
+ */
+struct ProcessNamespaceContext
{
- struct GNUNET_GE_Context *ectx;
- struct GNUNET_GC_Configuration *cfg;
- GNUNET_ECRS_NamespaceInfoProcessor cb;
- void *cls;
- int cnt;
+ /**
+ * Function to call.
+ */
+ GNUNET_FS_NamespaceInfoProcessor cb;
+
+ /**
+ * Closure for 'cb'.
+ */
+ void *cb_cls;
};
+
+/**
+ * Function called with a filename of a namespace. Reads the key and
+ * calls the callback.
+ *
+ * @param cls closure (struct ProcessNamespaceContext)
+ * @param filename complete filename (absolute path)
+ * @return GNUNET_OK to continue to iterate,
+ * GNUNET_SYSERR to abort iteration with error!
+ */
static int
-processFile_ (void *cls, const char *fileName)
+process_namespace (void *cls,
+ const char *filename)
{
- struct lNCLS *c = cls;
- struct GNUNET_RSA_PrivateKey *hk;
- GNUNET_RSA_PrivateKeyEncoded *hke;
- char *dst;
- unsigned long long len;
- GNUNET_HashCode namespace;
- GNUNET_RSA_PublicKey pk;
+ struct ProcessNamespaceContext *pnc = cls;
+ struct GNUNET_CRYPTO_RsaPrivateKey *key;
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
+ GNUNET_HashCode id;
const char *name;
+ const char *t;
- if (GNUNET_OK !=
- GNUNET_disk_file_size (c->ectx, fileName, &len, GNUNET_YES))
- return GNUNET_OK;
- if (len < 2)
+ key = GNUNET_CRYPTO_rsa_key_create_from_file (filename);
+ if (key == NULL)
{
- GNUNET_GE_LOG (c->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of file `%s' is invalid, trying to remove.\n"),
- fileName);
- UNLINK (fileName);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to read namespace private key file `%s', deleting it!\n"),
+ filename);
+ if (0 != UNLINK (filename))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
+ "unlink",
+ filename);
return GNUNET_OK;
}
- dst = GNUNET_malloc (len);
- len = GNUNET_disk_file_read (c->ectx, fileName, len, dst);
- hke = (GNUNET_RSA_PrivateKeyEncoded *) dst;
- if (ntohs (hke->len) != len)
- {
- GNUNET_GE_LOG (c->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of file `%s' is invalid, trying to remove.\n"),
- fileName);
- UNLINK (fileName);
- GNUNET_free (hke);
- return GNUNET_OK;
- }
- hk = GNUNET_RSA_decode_key (hke);
- GNUNET_free (hke);
- if (hk == NULL)
- {
- GNUNET_GE_LOG (c->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of file `%s' is invalid, trying to remove.\n"),
- fileName);
- UNLINK (fileName);
- GNUNET_GE_BREAK (c->ectx, 0);
- return GNUNET_SYSERR;
- }
- GNUNET_RSA_get_public_key (hk, &pk);
- GNUNET_RSA_free_key (hk);
- GNUNET_hash (&pk, sizeof (GNUNET_RSA_PublicKey), &namespace);
- if (NULL != c->cb)
- {
- name = fileName;
- while (NULL != strstr (name, DIR_SEPARATOR_STR))
- name = 1 + strstr (name, DIR_SEPARATOR_STR);
- if (GNUNET_OK == c->cb (&namespace, name, c->cls))
- c->cnt++;
- else
- c->cnt = GNUNET_SYSERR;
- }
- else
- c->cnt++;
+ GNUNET_CRYPTO_rsa_key_get_public (key, &pk);
+ GNUNET_CRYPTO_rsa_key_free (key);
+ GNUNET_CRYPTO_hash (&pk, sizeof(pk), &id);
+ name = filename;
+ while (NULL != (t = strstr (name, DIR_SEPARATOR_STR)))
+ name = t + 1;
+ pnc->cb (pnc->cb_cls,
+ name,
+ &id);
return GNUNET_OK;
}
+
/**
- * Build a list of all available namespaces
+ * Build a list of all available local (!) namespaces The returned
+ * names are only the nicknames since we only iterate over the local
+ * namespaces.
*
- * @param list where to store the names (is allocated, caller frees)
- * @return GNUNET_SYSERR on error, otherwise the number of pseudonyms in list
+ * @param h handle to the file sharing subsystem
+ * @param cb function to call on each known namespace
+ * @param cb_cls closure for cb
*/
-int
-GNUNET_ECRS_get_namespaces (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- GNUNET_ECRS_NamespaceInfoProcessor cb, void *cls)
+void
+GNUNET_FS_namespace_list (struct GNUNET_FS_Handle *h,
+ GNUNET_FS_NamespaceInfoProcessor cb,
+ void *cb_cls)
{
- char *dirName;
- struct lNCLS myCLS;
-
- myCLS.cls = cls;
- myCLS.cb = cb;
- myCLS.cnt = 0;
- myCLS.ectx = ectx;
- myCLS.cfg = cfg;
- dirName = getPseudonymFileName (ectx, cfg, NULL);
- GNUNET_disk_directory_scan (ectx, dirName, &processFile_, &myCLS);
- GNUNET_free (dirName);
- return myCLS.cnt;
+ char *dn;
+ struct ProcessNamespaceContext ctx;
+
+ dn = get_namespace_directory (h);
+ if (dn == NULL)
+ return;
+ ctx.cb = cb;
+ ctx.cb_cls = cb_cls;
+ GNUNET_DISK_directory_scan (dn,
+ &process_namespace,
+ &ctx);
+ GNUNET_free (dn);
}
+/* end of fs_namespace.c */
-
-/* end of namespace.c */
-#endif
projects / oweals / gnunet.git / blobdiff