lib-ssl-iostream: If certificate is empty, say it clearly in the error message

Instead of "There is no valid PEM certificate" just say
"The certificate is empty".

diff --git a/src/lib-ssl-iostream/iostream-openssl-common.c b/src/lib-ssl-iostream/iostream-openssl-common.c
index d79c986ed87ea3e1ef5ab2dfaf64e57e72147170..f02f6154714dc5a60d44ba1123ee577778723c12 100644 (file)
--- a/src/lib-ssl-iostream/iostream-openssl-common.c
+++ b/src/lib-ssl-iostream/iostream-openssl-common.c
@@ -271,6 +271,9 @@ openssl_iostream_use_certificate_error(const char *cert, const char *set_name)
 {
        unsigned long err;
 
+       if (cert[0] == '\0')
+               return "The certificate is empty";
+
        err = ERR_peek_error();
        if (ERR_GET_LIB(err) != ERR_LIB_PEM ||
            ERR_GET_REASON(err) != PEM_R_NO_START_LINE)