Initial decryption support

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@13828 d0543943-73ff-0310-b7d9-9358b9ac24b2

diff --git a/src/mod/event_handlers/mod_event_multicast/mod_event_multicast.c b/src/mod/event_handlers/mod_event_multicast/mod_event_multicast.c
index 7057bf7eb1af3e3933ad84568d41f90ff2c57e2e..64d9dc6110ab056720f0c1d4be0d508768d5791c 100644 (file)
--- a/src/mod/event_handlers/mod_event_multicast/mod_event_multicast.c
+++ b/src/mod/event_handlers/mod_event_multicast/mod_event_multicast.c
@@ -373,6 +373,36 @@ SWITCH_MODULE_RUNTIME_FUNCTION(mod_event_multicast_runtime)
                if (host_hash == globals.host_hash) {
                        continue;
                }
+#ifdef HAVE_OPENSSL
+               if (globals.psk) {
+                       char uuid_str[SWITCH_UUID_FORMATTED_LENGTH+1];
+                       char *tmp;
+                       int outl, tmplen;
+                       EVP_CIPHER_CTX ctx;
+
+                       len -= sizeof(host_hash) + SWITCH_UUID_FORMATTED_LENGTH;
+
+                       tmp = malloc(len);
+
+                       memset(tmp, 0, len);
+
+                       switch_copy_string(uuid_str, packet, SWITCH_UUID_FORMATTED_LENGTH);
+                       packet += SWITCH_UUID_FORMATTED_LENGTH;
+
+                       EVP_CIPHER_CTX_init(&ctx);
+                       EVP_DecryptInit(&ctx, EVP_bf_cfb(), NULL, NULL);
+                       EVP_CIPHER_CTX_set_key_length(&ctx, strlen(globals.psk));
+                       EVP_DecryptInit(&ctx, NULL, (unsigned char*) globals.psk, (unsigned char*) uuid_str);
+                       EVP_DecryptUpdate(&ctx, (unsigned char*) tmp,
+                                       &outl, (unsigned char*) packet, (int) len);
+                       EVP_DecryptFinal(&ctx, (unsigned char*) tmp + outl, &tmplen);
+
+                       /*switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "decrypted event as %s\n----------\n of actual length %d (%d) %d\n", tmp, outl + tmplen, (int) len, (int) strlen(tmp));*/
+                       /*continue;*/
+                       packet = tmp;
+
+               }
+#endif
                //switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "\nEVENT %d\n--------------------------------\n%s\n", (int) len, packet);
                if (switch_event_create_subclass(&local_event, SWITCH_EVENT_CUSTOM, MULTICAST_EVENT) == SWITCH_STATUS_SUCCESS) {
                        char *var, *val, *term = NULL, tmpname[128];