[evolution] I#306 - Add emailmd5 to mail autoconfig request

[Milan Crha <mcrha src gnome org>]

commit 9c688da9ee9af592a55601c11c8363e106630866
Author: Milan Crha <mcrha redhat com>
Date:   Fri Feb 8 09:31:27 2019 +0100

    I#306 - Add emailmd5 to mail autoconfig request
    
    Closes https://gitlab.gnome.org/GNOME/evolution/issues/306

 src/mail/e-mail-autoconfig.c | 44 +++++++++++++++++++++++++++++++++++++-------
 1 file changed, 37 insertions(+), 7 deletions(-)
---
diff --git a/src/mail/e-mail-autoconfig.c b/src/mail/e-mail-autoconfig.c
index 38f3005d70..83ee064a1d 100644
--- a/src/mail/e-mail-autoconfig.c
+++ b/src/mail/e-mail-autoconfig.c
@@ -481,6 +481,7 @@ mail_autoconfig_lookup_uri_sync (EMailAutoconfig *autoconfig,
 static gboolean
 mail_autoconfig_lookup (EMailAutoconfig *autoconfig,
                         const gchar *domain,
+                       const gchar *emailmd5,
                         GCancellable *cancellable,
                         GError **error)
 {
@@ -510,14 +511,14 @@ mail_autoconfig_lookup (EMailAutoconfig *autoconfig,
 
        /* First try user configuration in autoconfig.$DOMAIN URL and ignore error */
        if (!success && ((error && !*error && !g_cancellable_set_error_if_cancelled (cancellable, error)) || 
!g_cancellable_is_cancelled (cancellable))) {
-               uri = g_strconcat ("http://autoconfig.";, domain, "/mail/config-v1.1.xml?emailaddress=" 
FAKE_EVOLUTION_USER_STRING "%40", domain, NULL);
+               uri = g_strconcat ("http://autoconfig.";, domain, "/mail/config-v1.1.xml?emailaddress=" 
FAKE_EVOLUTION_USER_STRING "%40", domain, "&emailmd5=", emailmd5, NULL);
                success = mail_autoconfig_lookup_uri_sync (autoconfig, uri, soup_session, cancellable, NULL);
                g_free (uri);
        }
 
        /* Then with $DOMAIN/.well-known/autoconfig/ and ignore error */
        if (!success && ((error && !*error && !g_cancellable_set_error_if_cancelled (cancellable, error)) || 
!g_cancellable_is_cancelled (cancellable))) {
-               uri = g_strconcat ("http://";, domain, 
"/.well-known/autoconfig/mail/config-v1.1.xml?emailaddress=" FAKE_EVOLUTION_USER_STRING "%40", domain, NULL);
+               uri = g_strconcat ("http://";, domain, 
"/.well-known/autoconfig/mail/config-v1.1.xml?emailaddress=" FAKE_EVOLUTION_USER_STRING "%40", domain, 
"&emailmd5=", emailmd5, NULL);
                success = mail_autoconfig_lookup_uri_sync (autoconfig, uri, soup_session, cancellable, NULL);
                g_free (uri);
        }
@@ -773,6 +774,27 @@ mail_autoconfig_result_to_config_lookup (EMailAutoconfig *mail_autoconfig,
        g_string_free (description, TRUE);
 }
 
+static gchar *
+mail_autoconfig_calc_emailmd5 (const gchar *email_address)
+{
+       gchar *lowercase, *emailmd5;
+
+       if (!email_address)
+               return NULL;
+
+       lowercase = g_ascii_strdown (email_address, -1);
+       if (!lowercase || !*lowercase) {
+               g_free (lowercase);
+               return NULL;
+       }
+
+       emailmd5 = g_compute_checksum_for_string (G_CHECKSUM_MD5, lowercase, -1);
+
+       g_free (lowercase);
+
+       return emailmd5;
+}
+
 static void
 mail_autoconfig_set_email_address (EMailAutoconfig *autoconfig,
                                    const gchar *email_address)
@@ -912,7 +934,7 @@ mail_autoconfig_initable_init (GInitable *initable,
        const gchar *email_address;
        const gchar *domain;
        const gchar *cp;
-       gchar *name_server;
+       gchar *name_server, *emailmd5;
        gboolean success = FALSE;
        GError *local_error = NULL;
 
@@ -945,22 +967,27 @@ mail_autoconfig_initable_init (GInitable *initable,
        if (autoconfig->priv->use_domain && *autoconfig->priv->use_domain)
                domain = autoconfig->priv->use_domain;
 
+       emailmd5 = mail_autoconfig_calc_emailmd5 (email_address);
+
        /* First try the email address domain verbatim. */
        success = mail_autoconfig_lookup (
-               autoconfig, domain, cancellable, &local_error);
+               autoconfig, domain, emailmd5, cancellable, &local_error);
 
        g_warn_if_fail (
                (success && local_error == NULL) ||
                (!success && local_error != NULL));
 
-       if (success)
+       if (success) {
+               g_free (emailmd5);
                return TRUE;
+       }
 
        /* "404 Not Found" errors are non-fatal this time around. */
        if (ERROR_IS_NOT_FOUND (local_error)) {
                g_clear_error (&local_error);
        } else {
                g_propagate_error (error, local_error);
+               g_free (emailmd5);
                return FALSE;
        }
 
@@ -969,8 +996,10 @@ mail_autoconfig_initable_init (GInitable *initable,
        name_server = mail_autoconfig_resolve_name_server (
                domain, cancellable, error);
 
-       if (name_server == NULL)
+       if (!name_server) {
+               g_free (emailmd5);
                return FALSE;
+       }
 
        /* Widdle away segments of the name server domain until
         * we find a match, or until we widdle down to nothing. */
@@ -980,7 +1009,7 @@ mail_autoconfig_initable_init (GInitable *initable,
                g_clear_error (&local_error);
 
                success = mail_autoconfig_lookup (
-                       autoconfig, cp, cancellable, &local_error);
+                       autoconfig, cp, emailmd5, cancellable, &local_error);
 
                g_warn_if_fail (
                        (success && local_error == NULL) ||
@@ -1000,6 +1029,7 @@ mail_autoconfig_initable_init (GInitable *initable,
                g_propagate_error (error, local_error);
 
        g_free (name_server);
+       g_free (emailmd5);
 
        return success;
 }