x/crypto/otr: update libotr test code for version 4.

The test for this package contains a test case (disabled by default)
that exercises the code against libotr (the reference implementation).
Since that test was written, libotr has updated to version 4 which
contains non-backwards-compatible API changes.

This change updates the test harness for version 4 of libotr.

Change-Id: Ib40c899c609cc827903ae18fd80476d179bf0a33
Reviewed-on: https://go-review.googlesource.com/16936
Reviewed-by: Andrew Gerrand <adg@golang.org>

Author: agl

otr/libotr_test_helper.c

@@ -13,6 +13,7 @@
 
 #include <proto.h>
 #include <message.h>
+#include <privkey.h>
 
 static int g_session_established = 0;
 
@@ -30,25 +31,9 @@ void inject_message(void *opdata, const char *accountname, const char *protocol,
   fprintf(stderr, "libotr helper sent: %s\n", message);
 }
 
-void notify(void *opdata, OtrlNotifyLevel level, const char *accountname, const char *protocol, const char *username, const char *title, const char *primary, const char *secondary) {
-  fprintf(stderr, "NOTIFY: %s %s %s %s\n", username, title, primary, secondary);
-}
-
-int display_otr_message(void *opdata, const char *accountname, const char *protocol, const char *username, const char *msg) {
-  fprintf(stderr, "MESSAGE: %s %s\n", username, msg);
-  return 1;
-}
-
 void update_context_list(void *opdata) {
 }
 
-const char *protocol_name(void *opdata, const char *protocol) {
-        return "PROTOCOL";
-}
-
-void protocol_name_free(void *opdata, const char *protocol_name) {
-}
-
 void new_fingerprint(void *opdata, OtrlUserState us, const char *accountname, const char *protocol, const char *username, unsigned char fingerprint[20]) {
         fprintf(stderr, "NEW FINGERPRINT\n");
         g_session_established = 1;
@@ -66,10 +51,6 @@ void gone_insecure(void *opdata, ConnContext *context) {
 void still_secure(void *opdata, ConnContext *context, int is_reply) {
 }
 
-void log_message(void *opdata, const char *message) {
-        fprintf(stderr, "MESSAGE: %s\n", message);
-}
-
 int max_message_size(void *opdata, ConnContext *context) {
   return 99999;
 }
@@ -81,25 +62,48 @@ const char *account_name(void *opdata, const char *account, const char *protocol
 void account_name_free(void *opdata, const char *account_name) {
 }
 
+const char *error_message(void *opdata, ConnContext *context, OtrlErrorCode err_code) {
+        return "ERR";
+}
+
+void error_message_free(void *opdata, const char *msg) {
+}
+
+void resent_msg_prefix_free(void *opdata, const char *prefix) {
+}
+
+void handle_smp_event(void *opdata, OtrlSMPEvent smp_event, ConnContext *context, unsigned short progress_event, char *question) {
+}
+
+void handle_msg_event(void *opdata, OtrlMessageEvent msg_event, ConnContext *context, const char *message, gcry_error_t err) {
+        fprintf(stderr, "msg event: %d %s\n", msg_event, message);
+}
+
 OtrlMessageAppOps uiops = {
   policy,
   NULL,
   is_logged_in,
   inject_message,
-  notify,
-  display_otr_message,
   update_context_list,
-  protocol_name,
-  protocol_name_free,
   new_fingerprint,
   write_fingerprints,
   gone_secure,
   gone_insecure,
   still_secure,
-  log_message,
   max_message_size,
   account_name,
   account_name_free,
+  NULL, /* received_symkey */
+  error_message,
+  error_message_free,
+  NULL, /* resent_msg_prefix */
+  resent_msg_prefix_free,
+  handle_smp_event,
+  handle_msg_event,
+  NULL /* create_instag */,
+  NULL /* convert_msg */,
+  NULL /* convert_free */,
+  NULL /* timer_control */,
 };
 
 static const char kPrivateKeyData[] = "(privkeys (account (name \"account\") (protocol proto) (private-key (dsa (p #00FC07ABCF0DC916AFF6E9AE47BEF60C7AB9B4D6B2469E436630E36F8A489BE812486A09F30B71224508654940A835301ACC525A4FF133FC152CC53DCC59D65C30A54F1993FE13FE63E5823D4C746DB21B90F9B9C00B49EC7404AB1D929BA7FBA12F2E45C6E0A651689750E8528AB8C031D3561FECEE72EBB4A090D450A9B7A857#) (q #00997BD266EF7B1F60A5C23F3A741F2AEFD07A2081#) (g #535E360E8A95EBA46A4F7DE50AD6E9B2A6DB785A66B64EB9F20338D2A3E8FB0E94725848F1AA6CC567CB83A1CC517EC806F2E92EAE71457E80B2210A189B91250779434B41FC8A8873F6DB94BEA7D177F5D59E7E114EE10A49CFD9CEF88AE43387023B672927BA74B04EB6BBB5E57597766A2F9CE3857D7ACE3E1E3BC1FC6F26#) (y #0AC8670AD767D7A8D9D14CC1AC6744CD7D76F993B77FFD9E39DF01E5A6536EF65E775FCEF2A983E2A19BD6415500F6979715D9FD1257E1FE2B6F5E1E74B333079E7C880D39868462A93454B41877BE62E5EF0A041C2EE9C9E76BD1E12AE25D9628DECB097025DD625EF49C3258A1A3C0FF501E3DC673B76D7BABF349009B6ECF#) (x #14D0345A3562C480A039E3C72764F72D79043216#)))))\n";
@@ -142,7 +146,7 @@ main() {
 
     char *newmessage = NULL;
     OtrlTLV *tlvs;
-    int ignore_message = otrl_message_receiving(userstate, &uiops, NULL, "account", "proto", "peer", message, &newmessage, &tlvs, NULL, NULL);
+    int ignore_message = otrl_message_receiving(userstate, &uiops, NULL, "account", "proto", "peer", message, &newmessage, &tlvs, NULL, NULL, NULL);
     if (tlvs) {
             otrl_tlv_free(tlvs);
     }
@@ -154,16 +158,19 @@ main() {
       gcry_error_t err;
       char *newmessage = NULL;
 
-      err = otrl_message_sending(userstate, &uiops, NULL, "account", "proto", "peer", "test message", NULL, &newmessage, NULL, NULL);
+      err = otrl_message_sending(userstate, &uiops, NULL, "account", "proto", "peer", 0, "test message", NULL, &newmessage, OTRL_FRAGMENT_SEND_SKIP, NULL, NULL, NULL);
       if (newmessage == NULL) {
         fprintf(stderr, "libotr didn't encrypt message\n");
         return 1;
       }
       write(1, newmessage, strlen(newmessage));
       write(1, "\n", 1);
-      g_session_established = 0;
+      fprintf(stderr, "libotr sent: %s\n", newmessage);
       otrl_message_free(newmessage);
+
+      g_session_established = 0;
       write(1, "?OTRv2?\n", 8);
+      fprintf(stderr, "libotr sent: ?OTRv2\n");
     }
   }