imap-login: Properly recognize an empty SASL initial response.

Pass only the empty string to the auth service and not "=".

diff --git a/src/imap-login/client-authenticate.c b/src/imap-login/client-authenticate.c
index 059d57815a98f29ff7e6503f7bf3deea29511190..adc1ef962cc5893997b43352510864e984a0ad88 100644 (file)
--- a/src/imap-login/client-authenticate.c
+++ b/src/imap-login/client-authenticate.c
@@ -129,6 +129,10 @@ imap_client_auth_begin(struct imap_client *imap_client, const char *mech_name,
        imap_client->common.master_data_prefix = (void *)prefix;
        imap_client->common.master_data_prefix_len = strlen(prefix)+1;
 
+       if (*init_resp == '\0')
+               init_resp = NULL;
+       else if (strcmp(init_resp, "=") == 0)
+               init_resp = "";
        return client_auth_begin(&imap_client->common, mech_name, init_resp);
 }