[GNUnet-SVN] r28075 - gnunet/src/identity

[gnunet]

Author: grothoff
Date: 2013-07-16 09:49:32 +0200 (Tue, 16 Jul 2013)
New Revision: 28075

Modified:
   gnunet/src/identity/gnunet-service-identity.c
Log:
-implement set handling

Modified: gnunet/src/identity/gnunet-service-identity.c
===================================================================
--- gnunet/src/identity/gnunet-service-identity.c       2013-07-16 07:42:11 UTC 
(rev 28074)
+++ gnunet/src/identity/gnunet-service-identity.c       2013-07-16 07:49:32 UTC 
(rev 28075)
@@ -28,7 +28,6 @@
  *
  * TODO:
  * - disk operations
- * - default identity set/get handlers
  */
 #include "platform.h"
 #include "gnunet_util_lib.h"
@@ -339,6 +338,26 @@
 
 
 /**
+ * Compare the given two private keys for equality.
+ * 
+ * @param pk1 one private key
+ * @param pk2 another private key
+ * @return 0 if the keys are equal
+ */
+static int
+key_cmp (const struct GNUNET_CRYPTO_EccPrivateKey *pk1,
+        const struct GNUNET_CRYPTO_EccPrivateKey *pk2)
+{
+  struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded p1;
+  struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded p2;
+  
+  GNUNET_CRYPTO_ecc_key_get_public (pk1, &p1);
+  GNUNET_CRYPTO_ecc_key_get_public (pk2, &p2);
+  return memcmp (&p1, &p2, sizeof (struct 
GNUNET_CRYPTO_EccPublicKeyBinaryEncoded));
+}
+
+
+/**
  * Handler for SET_DEFAULT message from client, updates
  * default identity for some service.
  *
@@ -350,12 +369,60 @@
 handle_set_default_message (void *cls, struct GNUNET_SERVER_Client *client,
                            const struct GNUNET_MessageHeader *message)
 {
+  const struct GNUNET_IDENTITY_SetDefaultMessage *sdm;
+  uint16_t size;
+  uint16_t name_len;
+  uint16_t pk_len;
+  struct Ego *ego;
+  const char *str;
+  struct GNUNET_CRYPTO_EccPrivateKey *pk;
+
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, 
              "Received SET_DEFAULT message from client\n");
-  // setup_estimate_message (&em);
-  // GNUNET_SERVER_notification_context_unicast (nc, client, &em.header, 
GNUNET_YES);
-  GNUNET_break (0); // not implemented!
-  GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+  size = ntohs (message->size);
+  if (size <= sizeof (struct GNUNET_IDENTITY_SetDefaultMessage))
+  {
+    GNUNET_break (0);
+    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    return;
+  }
+  sdm = (const struct GNUNET_IDENTITY_SetDefaultMessage *) message;
+  name_len = ntohs (sdm->name_len);
+  pk_len = ntohs (sdm->pk_len);
+  str = (const char *) &sdm[1];
+  if ( (name_len + pk_len + sizeof (struct GNUNET_IDENTITY_SetDefaultMessage) 
!= size) ||
+       (NULL == (pk = GNUNET_CRYPTO_ecc_decode_key (str, pk_len, GNUNET_YES))) 
)
+  {
+    GNUNET_break (0);
+    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    return;
+  }
+  str = &str[pk_len];
+  if ('\0' != str[name_len - 1])
+  {
+    GNUNET_break (0);
+    GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+    return;
+  }
+  for (ego = ego_head; NULL != ego; ego = ego->next)
+  {
+    if (0 == key_cmp (ego->pk,
+                     pk))
+    {
+      GNUNET_CONFIGURATION_set_value_string (subsystem_cfg,
+                                            str,
+                                            "DEFAULT_IDENTIFIER",
+                                            ego->identifier);
+      /* fixme: write configuration to disk... */
+      send_result_code (client, 0, NULL);
+      GNUNET_SERVER_receive_done (client, GNUNET_OK);
+      GNUNET_CRYPTO_ecc_key_free (pk);
+      return;
+    }
+  }  
+  send_result_code (client, 1, _("Unknown ego specified for service (internal 
error)"));
+  GNUNET_SERVER_receive_done (client, GNUNET_OK);
+  GNUNET_CRYPTO_ecc_key_free (pk);
 }