Renamed otr implementations

1 files changed, 525 insertions, 0 deletions

diff --git a/src/otr/otrlibv4.c b/src/otr/otrlibv4.c
new file mode 100644
index 00000000..ddd4aeeb
--- /dev/null
+++ b/src/otr/otrlibv4.c
@@ -0,0 +1,525 @@
+/*
+ * otr4.c
+ *
+ * Copyright (C) 2012, 2013 James Booth <boothj5@gmail.com>
+ *
+ * This file is part of Profanity.
+ *
+ * Profanity 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Profanity 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 Profanity.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <libotr/proto.h>
+#include <libotr/privkey.h>
+#include <libotr/message.h>
+#include <glib.h>
+
+#include "otr.h"
+#include "log.h"
+#include "roster_list.h"
+#include "contact.h"
+#include "ui/ui.h"
+
+static OtrlUserState user_state;
+static OtrlMessageAppOps ops;
+static char *jid;
+static gboolean data_loaded;
+
+// ops callbacks
+static OtrlPolicy
+cb_policy(void *opdata, ConnContext *context)
+{
+    return OTRL_POLICY_ALLOW_V1 | OTRL_POLICY_ALLOW_V2 | OTRL_POLICY_ALLOW_V3;
+}
+
+static int
+cb_is_logged_in(void *opdata, const char *accountname,
+    const char *protocol, const char *recipient)
+{
+    PContact contact = roster_get_contact(recipient);
+    if (g_strcmp0(p_contact_presence(contact), "offline") == 0) {
+        return 0;
+    } else {
+        return 1;
+    }
+}
+
+static void
+cb_inject_message(void *opdata, const char *accountname,
+    const char *protocol, const char *recipient, const char *message)
+{
+    message_send(message, recipient);
+}
+
+static const char*
+cb_otr_error_message(void *opdata, ConnContext *context,
+    OtrlErrorCode err_code)
+{
+    switch(err_code)
+    {
+        case OTRL_ERRCODE_ENCRYPTION_ERROR:
+            return strdup("OTR Error: occured while encrypting a message");
+        case OTRL_ERRCODE_MSG_NOT_IN_PRIVATE:
+            return strdup("OTR Error: Sent encrypted message to somebody who is not in a mutual OTR session");
+        case OTRL_ERRCODE_MSG_UNREADABLE:
+            return strdup("OTR Error: sent an unreadable encrypted message");
+        case OTRL_ERRCODE_MSG_MALFORMED:
+            return strdup("OTR Error: message sent is malformed");
+        default:
+            return strdup("OTR Error: unknown");
+    }
+}
+
+static void
+cb_otr_error_message_free(void *opdata, const char *err_msg)
+{
+    free((char *)err_msg);
+}
+
+static void
+cb_handle_msg_event(void *opdata, OtrlMessageEvent msg_event,
+    ConnContext *context, const char *message,
+    gcry_error_t err)
+{
+    if (message != NULL) {
+        cons_show_error("%s", message);
+    } else {
+        cons_show_error("OTR error event with no message.");
+    }
+}
+
+static void
+cb_write_fingerprints(void *opdata)
+{
+    gcry_error_t err = 0;
+    gchar *data_home = xdg_get_data_home();
+    gchar *account_dir = str_replace(jid, "@", "_at_");
+
+    GString *basedir = g_string_new(data_home);
+    g_string_append(basedir, "/profanity/otr/");
+    g_string_append(basedir, account_dir);
+    g_string_append(basedir, "/");
+    free(account_dir);
+
+    GString *fpsfilename = g_string_new(basedir->str);
+    g_string_append(fpsfilename, "fingerprints.txt");
+    err = otrl_privkey_write_fingerprints(user_state, fpsfilename->str);
+    if (!err == GPG_ERR_NO_ERROR) {
+        log_error("Failed to write fingerprints file");
+        cons_show_error("Failed to create fingerprints file");
+    }
+    g_string_free(basedir, TRUE);
+    g_string_free(fpsfilename, TRUE);
+}
+
+static void
+cb_gone_secure(void *opdata, ConnContext *context)
+{
+    ui_gone_secure(context->username, otr_is_trusted(context->username));
+}
+
+char *
+otr_libotr_version(void)
+{
+    return OTRL_VERSION;
+}
+
+void
+otr_init(void)
+{
+    log_info("Initialising OTR");
+    OTRL_INIT;
+
+    ops.policy = cb_policy;
+    ops.is_logged_in = cb_is_logged_in;
+    ops.inject_message = cb_inject_message;
+    ops.otr_error_message = cb_otr_error_message;
+    ops.otr_error_message_free = cb_otr_error_message_free;
+    ops.handle_msg_event = cb_handle_msg_event;
+    ops.write_fingerprints = cb_write_fingerprints;
+    ops.gone_secure = cb_gone_secure;
+
+    data_loaded = FALSE;
+}
+
+void
+otr_on_connect(ProfAccount *account)
+{
+    jid = strdup(account->jid);
+    log_info("Loading OTR key for %s", jid);
+
+    gchar *data_home = xdg_get_data_home();
+    gchar *account_dir = str_replace(jid, "@", "_at_");
+
+    GString *basedir = g_string_new(data_home);
+    g_string_append(basedir, "/profanity/otr/");
+    g_string_append(basedir, account_dir);
+    g_string_append(basedir, "/");
+    free(account_dir);
+
+    if (!mkdir_recursive(basedir->str)) {
+        log_error("Could not create %s for account %s.", basedir->str, jid);
+        cons_show_error("Could not create %s for account %s.", basedir->str, jid);
+        g_string_free(basedir, TRUE);
+        return;
+    }
+
+    user_state = otrl_userstate_create();
+
+    gcry_error_t err = 0;
+
+    GString *keysfilename = g_string_new(basedir->str);
+    g_string_append(keysfilename, "keys.txt");
+    if (!g_file_test(keysfilename->str, G_FILE_TEST_IS_REGULAR)) {
+        log_info("No private key file found %s", keysfilename->str);
+        data_loaded = FALSE;
+    } else {
+        log_info("Loading OTR private key %s", keysfilename->str);
+        err = otrl_privkey_read(user_state, keysfilename->str);
+        if (!err == GPG_ERR_NO_ERROR) {
+            g_string_free(basedir, TRUE);
+            g_string_free(keysfilename, TRUE);
+            log_error("Failed to load private key");
+            return;
+        } else {
+            log_info("Loaded private key");
+            data_loaded = TRUE;
+        }
+    }
+
+    GString *fpsfilename = g_string_new(basedir->str);
+    g_string_append(fpsfilename, "fingerprints.txt");
+    if (!g_file_test(fpsfilename->str, G_FILE_TEST_IS_REGULAR)) {
+        log_info("No fingerprints file found %s", fpsfilename->str);
+        data_loaded = FALSE;
+    } else {
+        log_info("Loading fingerprints %s", fpsfilename->str);
+        err = otrl_privkey_read_fingerprints(user_state, fpsfilename->str, NULL, NULL);
+        if (!err == GPG_ERR_NO_ERROR) {
+            g_string_free(basedir, TRUE);
+            g_string_free(keysfilename, TRUE);
+            g_string_free(fpsfilename, TRUE);
+            log_error("Failed to load fingerprints");
+            return;
+        } else {
+            log_info("Loaded fingerprints");
+            data_loaded = TRUE;
+        }
+    }
+
+    if (data_loaded) {
+        cons_show("Loaded OTR private key for %s", jid);
+    }
+
+    g_string_free(basedir, TRUE);
+    g_string_free(keysfilename, TRUE);
+    g_string_free(fpsfilename, TRUE);
+    return;
+}
+
+void
+otr_keygen(ProfAccount *account)
+{
+    if (data_loaded) {
+        cons_show("OTR key already generated.");
+        return;
+    }
+
+    jid = strdup(account->jid);
+    log_info("Generating OTR key for %s", jid);
+
+    jid = strdup(account->jid);
+
+    gchar *data_home = xdg_get_data_home();
+    gchar *account_dir = str_replace(jid, "@", "_at_");
+
+    GString *basedir = g_string_new(data_home);
+    g_string_append(basedir, "/profanity/otr/");
+    g_string_append(basedir, account_dir);
+    g_string_append(basedir, "/");
+    free(account_dir);
+
+    if (!mkdir_recursive(basedir->str)) {
+        log_error("Could not create %s for account %s.", basedir->str, jid);
+        cons_show_error("Could not create %s for account %s.", basedir->str, jid);
+        g_string_free(basedir, TRUE);
+        return;
+    }
+
+    gcry_error_t err = 0;
+
+    GString *keysfilename = g_string_new(basedir->str);
+    g_string_append(keysfilename, "keys.txt");
+    log_debug("Generating private key file %s for %s", keysfilename->str, jid);
+    cons_show("Generating private key, this may take some time.");
+    cons_show("Moving the mouse randomly around the screen may speed up the process!");
+    ui_current_page_off();
+    ui_refresh();
+    err = otrl_privkey_generate(user_state, keysfilename->str, account->jid, "xmpp");
+    if (!err == GPG_ERR_NO_ERROR) {
+        g_string_free(basedir, TRUE);
+        g_string_free(keysfilename, TRUE);
+        log_error("Failed to generate private key");
+        cons_show_error("Failed to generate private key");
+        return;
+    }
+    log_info("Private key generated");
+    cons_show("");
+    cons_show("Private key generation complete.");
+
+    GString *fpsfilename = g_string_new(basedir->str);
+    g_string_append(fpsfilename, "fingerprints.txt");
+    log_debug("Generating fingerprints file %s for %s", fpsfilename->str, jid);
+    err = otrl_privkey_write_fingerprints(user_state, fpsfilename->str);
+    if (!err == GPG_ERR_NO_ERROR) {
+        g_string_free(basedir, TRUE);
+        g_string_free(keysfilename, TRUE);
+        log_error("Failed to create fingerprints file");
+        cons_show_error("Failed to create fingerprints file");
+        return;
+    }
+    log_info("Fingerprints file created");
+
+    err = otrl_privkey_read(user_state, keysfilename->str);
+    if (!err == GPG_ERR_NO_ERROR) {
+        g_string_free(basedir, TRUE);
+        g_string_free(keysfilename, TRUE);
+        log_error("Failed to load private key");
+        data_loaded = FALSE;
+        return;
+    }
+
+    err = otrl_privkey_read_fingerprints(user_state, fpsfilename->str, NULL, NULL);
+    if (!err == GPG_ERR_NO_ERROR) {
+        g_string_free(basedir, TRUE);
+        g_string_free(keysfilename, TRUE);
+        log_error("Failed to load fingerprints");
+        data_loaded = FALSE;
+        return;
+    }
+
+    data_loaded = TRUE;
+
+    g_string_free(basedir, TRUE);
+    g_string_free(keysfilename, TRUE);
+    g_string_free(fpsfilename, TRUE);
+    return;
+}
+
+gboolean
+otr_key_loaded(void)
+{
+    return data_loaded;
+}
+
+gboolean
+otr_is_secure(const char * const recipient)
+{
+    ConnContext *context = otrl_context_find(user_state, recipient, jid, "xmpp",
+        OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
+
+    if (context == NULL) {
+        return FALSE;
+    }
+
+    if (context->msgstate != OTRL_MSGSTATE_ENCRYPTED) {
+        return FALSE;
+    } else {
+        return TRUE;
+    }
+}
+
+gboolean
+otr_is_trusted(const char * const recipient)
+{
+    ConnContext *context = otrl_context_find(user_state, recipient, jid, "xmpp",
+        OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
+
+    if (context == NULL) {
+        return FALSE;
+    }
+
+    if (context->msgstate != OTRL_MSGSTATE_ENCRYPTED) {
+        return TRUE;
+    }
+
+    if (context->active_fingerprint &&
+                g_strcmp0(context->active_fingerprint->trust, "trusted") == 0) {
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+void
+otr_trust(const char * const recipient)
+{
+    ConnContext *context = otrl_context_find(user_state, recipient, jid, "xmpp",
+        OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
+
+    if (context == NULL) {
+        return;
+    }
+
+    if (context->msgstate != OTRL_MSGSTATE_ENCRYPTED) {
+        return;
+    }
+
+    if (context->active_fingerprint) {
+        context->active_fingerprint->trust = "trusted";
+        cb_write_fingerprints(NULL);
+    }
+
+    return;
+}
+
+void
+otr_untrust(const char * const recipient)
+{
+    ConnContext *context = otrl_context_find(user_state, recipient, jid, "xmpp",
+        OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
+
+    if (context == NULL) {
+        return;
+    }
+
+    if (context->msgstate != OTRL_MSGSTATE_ENCRYPTED) {
+        return;
+    }
+
+    if (context->active_fingerprint) {
+        context->active_fingerprint->trust = NULL;
+        cb_write_fingerprints(NULL);
+    }
+
+    return;
+}
+
+void
+otr_end_session(const char * const recipient)
+{
+    ConnContext *context = otrl_context_find(user_state, recipient, jid, "xmpp",
+        OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
+
+    if (context != NULL) {
+        otrl_message_disconnect(user_state, &ops, NULL, jid, "xmpp", recipient, 0);
+    }
+}
+
+char *
+otr_get_my_fingerprint(void)
+{
+    char fingerprint[45];
+    otrl_privkey_fingerprint(user_state, fingerprint, jid, "xmpp");
+    char *result = strdup(fingerprint);
+
+    return result;
+}
+
+char *
+otr_get_their_fingerprint(const char * const recipient)
+{
+    ConnContext *context = otrl_context_find(user_state, recipient, jid, "xmpp",
+        OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
+
+    if (context != NULL) {
+        Fingerprint *fingerprint = context->active_fingerprint;
+        char readable[45];
+        otrl_privkey_hash_to_human(readable, fingerprint->fingerprint);
+        return strdup(readable);
+    } else {
+        return NULL;
+    }
+}
+
+char *
+otr_encrypt_message(const char * const to, const char * const message)
+{
+    gcry_error_t err;
+    char *newmessage = NULL;
+
+    err = otrl_message_sending(
+        user_state,
+        &ops,
+        NULL,
+        jid,
+        "xmpp",
+        to,
+        OTRL_INSTAG_MASTER,
+        message,
+        0,
+        &newmessage,
+        OTRL_FRAGMENT_SEND_SKIP,
+        NULL,
+        NULL,
+        NULL);
+
+    if (!err == GPG_ERR_NO_ERROR) {
+        return NULL;
+    } else {
+        return newmessage;
+    }
+}
+
+char *
+otr_decrypt_message(const char * const from, const char * const message, gboolean *was_decrypted)
+{
+    char *decrypted = NULL;
+    OtrlTLV *tlvs = NULL;
+    OtrlTLV *tlv = NULL;
+    int result = otrl_message_receiving(
+        user_state,
+        &ops,
+        NULL,
+        jid,
+        "xmpp",
+        from,
+        message,
+        &decrypted,
+        &tlvs,
+        NULL,
+        NULL,
+        NULL);
+
+    // internal libotr message
+    if (result == 1) {
+        tlv = otrl_tlv_find(tlvs, OTRL_TLV_DISCONNECTED);
+        if (tlv) {
+            ConnContext *context = otrl_context_find(user_state, from, jid, "xmpp",
+                OTRL_INSTAG_MASTER, 0, NULL, NULL, NULL);
+
+            if (context != NULL) {
+                otrl_context_force_plaintext(context);
+                ui_gone_insecure(from);
+            }
+        }
+        return NULL;
+
+    // message was decrypted, return to user
+    } else if (decrypted != NULL) {
+        *was_decrypted = TRUE;
+        return decrypted;
+
+    // normal non OTR message
+    } else {
+        *was_decrypted = FALSE;
+        return strdup(message);
+    }
+}
+
+void
+otr_free_message(char *message)
+{
+    otrl_message_free(message);
+}