#include "gnunet_block_lib.h"
#include "plugin_block.h"
-/**
- * Check if the given KBlock is well-formed.
- *
- * @param kb the kblock data (or at least "dsize" bytes claiming to be one)
- * @param dsize size of "kb" in bytes; check for < sizeof(struct KBlock)!
- * @param query where to store the query that this block answers
- * @return GNUNET_OK if this is actually a well-formed KBlock
- */
-static int
-check_kblock (const struct KBlock *kb,
- size_t dsize,
- GNUNET_HashCode *query)
-{
- if (dsize < sizeof (struct KBlock))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (dsize - sizeof (struct KBlock) !=
- ntohl (kb->purpose.size)
- - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
- - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK !=
- GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_KBLOCK,
- &kb->purpose,
- &kb->signature,
- &kb->keyspace))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (query != NULL)
- GNUNET_CRYPTO_hash (&kb->keyspace,
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- query);
- return GNUNET_OK;
-}
-
-
-/**
- * Check if the given NBlock is well-formed.
- *
- * @param nb the nblock data (or at least "dsize" bytes claiming to be one)
- * @param dsize size of "nb" in bytes; check for < sizeof(struct NBlock)!
- * @param query where to store the query that this block answers
- * @return GNUNET_OK if this is actually a well-formed NBlock
- */
-static int
-check_nblock (const struct NBlock *nb,
- size_t dsize,
- GNUNET_HashCode *query)
-{
- if (dsize < sizeof (struct NBlock))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (dsize - sizeof (struct NBlock) !=
- ntohl (nb->ns_purpose.size)
- - sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose)
- - sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) )
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (dsize !=
- ntohl (nb->ksk_purpose.size) + sizeof (struct GNUNET_CRYPTO_RsaSignature))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK !=
- GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK_KSIG,
- &nb->ksk_purpose,
- &nb->ksk_signature,
- &nb->keyspace))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK !=
- GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK,
- &nb->ns_purpose,
- &nb->ns_signature,
- &nb->subspace))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (query != NULL)
- GNUNET_CRYPTO_hash (&nb->keyspace,
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- query);
- return GNUNET_OK;
-}
-
-
-/**
- * Check if the given SBlock is well-formed.
- *
- * @param sb the sblock data (or at least "dsize" bytes claiming to be one)
- * @param dsize size of "kb" in bytes; check for < sizeof(struct SBlock)!
- * @param query where to store the query that this block answers
- * @return GNUNET_OK if this is actually a well-formed SBlock
- */
-static int
-check_sblock (const struct SBlock *sb,
- size_t dsize,
- GNUNET_HashCode *query)
-{
- if (dsize < sizeof (struct SBlock))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (dsize !=
- ntohl (sb->purpose.size) + sizeof (struct GNUNET_CRYPTO_RsaSignature))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK !=
- GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_FS_SBLOCK,
- &sb->purpose,
- &sb->signature,
- &sb->subspace))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (query != NULL)
- *query = sb->identifier;
- return GNUNET_OK;
-}
-
-
-/**
- * Check if the given block is well-formed (and of the given type).
- *
- * @param type type of the block
- * @param block the block data (or at least "size" bytes claiming to be one)
- * @param size size of "kb" in bytes; check that it is large enough
- * @param query where to store the query that this block answers
- * @return GNUNET_OK if this is actually a well-formed block,
- * GNUNET_NO if we could not determine the query,
- * GNUNET_SYSERR if the block is malformed
- */
-int
-GNUNET_BLOCK_check_block (enum GNUNET_BLOCK_Type type,
- const void *block,
- size_t size,
- GNUNET_HashCode *query)
-{
- /* first, validate! */
- switch (type)
- {
- case GNUNET_BLOCK_TYPE_DBLOCK:
- case GNUNET_BLOCK_TYPE_IBLOCK:
- GNUNET_CRYPTO_hash (block, size, query);
- break;
- case GNUNET_BLOCK_TYPE_KBLOCK:
- if (GNUNET_OK !=
- check_kblock (block,
- size,
- query))
- return GNUNET_SYSERR;
- break;
- case GNUNET_BLOCK_TYPE_SBLOCK:
- if (GNUNET_OK !=
- check_sblock (block,
- size,
- query))
- return GNUNET_SYSERR;
- break;
- case GNUNET_BLOCK_TYPE_NBLOCK:
- if (GNUNET_OK !=
- check_nblock (block,
- size,
- query))
- return GNUNET_SYSERR;
- return GNUNET_OK;
- case GNUNET_BLOCK_TYPE_ONDEMAND:
- if (size != sizeof (struct OnDemandBlock))
- return GNUNET_SYSERR;
- memset (query, 0, sizeof (GNUNET_HashCode));
- return GNUNET_NO;
- default:
- /* unknown block type */
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
-}
-
-/* ***************** NEW API ******************* */
/**
* Handle for a plugin.
struct GNUNET_BLOCK_PluginFunctions *api;
};
+
/**
* Handle to an initialized block library.
*/
};
+/**
+ * Mingle hash with the mingle_number to produce different bits.
+ *
+ * @param in original hash code
+ * @param mingle_number number for hash permutation
+ * @param hc where to store the result.
+ */
+void
+GNUNET_BLOCK_mingle_hash (const GNUNET_HashCode * in,
+ int32_t mingle_number,
+ GNUNET_HashCode * hc)
+{
+ GNUNET_HashCode m;
+
+ GNUNET_CRYPTO_hash (&mingle_number,
+ sizeof (int32_t),
+ &m);
+ GNUNET_CRYPTO_hash_xor (&m, in, hc);
+}
+
+
/**
* Create a block context. Loads the block plugins.
*
GNUNET_BLOCK_context_create (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_BLOCK_Context *ctx;
+ struct GNUNET_BLOCK_PluginFunctions *api;
+ struct Plugin *plugin;
unsigned int num_plugins;
+ char *plugs;
+ char *pos;
+ char *libname;
ctx = GNUNET_malloc (sizeof (struct GNUNET_BLOCK_Context));
ctx->cfg = cfg;
num_plugins = 0;
- /* FIXME: actually load plugins... */
+ if (GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (cfg,
+ "block", "PLUGINS", &plugs))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Loading block plugins `%s'\n"), plugs);
+ pos = strtok (plugs, " ");
+ while (pos != NULL)
+ {
+ GNUNET_asprintf (&libname, "libgnunet_plugin_block_%s", pos);
+ api = GNUNET_PLUGIN_load (libname, NULL);
+ if (api == NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to load block plugin `%s'\n"),
+ pos);
+ GNUNET_free (libname);
+ }
+ else
+ {
+ plugin = GNUNET_malloc (sizeof (struct Plugin));
+ plugin->api = api;
+ plugin->library_name = libname;
+ GNUNET_array_append (ctx->plugins,
+ num_plugins,
+ plugin);
+ }
+ pos = strtok (NULL, " ");
+ }
+ GNUNET_free (plugs);
+ }
GNUNET_array_append (ctx->plugins,
num_plugins,
NULL);
projects / oweals / gnunet.git / blobdiff