zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/des/cbc_cksm.c b/ap/lib/libssl/openssl-1.1.1o/crypto/des/cbc_cksm.c
new file mode 100644
index 0000000..c5e2e01
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/des/cbc_cksm.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "des_local.h"
+
+DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output,
+ long length, DES_key_schedule *schedule,
+ const_DES_cblock *ivec)
+{
+ register DES_LONG tout0, tout1, tin0, tin1;
+ register long l = length;
+ DES_LONG tin[2];
+ unsigned char *out = &(*output)[0];
+ const unsigned char *iv = &(*ivec)[0];
+
+ c2l(iv, tout0);
+ c2l(iv, tout1);
+ for (; l > 0; l -= 8) {
+ if (l >= 8) {
+ c2l(in, tin0);
+ c2l(in, tin1);
+ } else
+ c2ln(in, tin0, tin1, l);
+
+ tin0 ^= tout0;
+ tin[0] = tin0;
+ tin1 ^= tout1;
+ tin[1] = tin1;
+ DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT);
+ tout0 = tin[0];
+ tout1 = tin[1];
+ }
+ if (out != NULL) {
+ l2c(tout0, out);
+ l2c(tout1, out);
+ }
+ tout0 = tin0 = tin1 = tin[0] = tin[1] = 0;
+ /*
+ * Transform the data in tout1 so that it will match the return value
+ * that the MIT Kerberos mit_des_cbc_cksum API returns.
+ */
+ tout1 = ((tout1 >> 24L) & 0x000000FF)
+ | ((tout1 >> 8L) & 0x0000FF00)
+ | ((tout1 << 8L) & 0x00FF0000)
+ | ((tout1 << 24L) & 0xFF000000);
+ return tout1;
+}