File ocki-3.1_10_0001-ica-sha-update-empty-msg.patch of Package openCryptoki.1904

commit 2094b476ab7c14caecc37add2da43bba11b71bf5
Author: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Date:   Fri Aug 15 12:48:46 2014 +0200

    Fixed ica token's SHA update function when passing zero message size
    
    Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>

--- opencryptoki.orig/usr/lib/pkcs11/ica_s390_stdll/ica_specific.c	2014-01-27 15:01:58.000000000 -0700
+++ opencryptoki/usr/lib/pkcs11/ica_s390_stdll/ica_specific.c	2014-09-05 09:19:55.009080000 -0600
@@ -859,7 +859,7 @@ token_specific_sha_update(	DIGEST_CONTEX
                          * we're not stuck with 0 bytes when the MSG_PART_FINAL
                          * comes in. - KEY
                          */
-                        if (!(in_data_len % 64)) {
+                        if (!(in_data_len % 64) && (in_data_len != 0)) {
                                 oc_sha_ctx->tail_len = 64;
                                 memcpy(oc_sha_ctx->tail, in_data + in_data_len - 64, 64);
                                 in_data_len -= 64;