1 files changed, 43 insertions, 0 deletions
diff --git a/epid/common/math/src/sha256.c b/epid/common/math/src/sha256.c
new file mode 100644
index 0000000..7f1b3f3
--- /dev/null
+++ b/epid/common/math/src/sha256.c
@@ -0,0 +1,43 @@
+/*############################################################################
+# Copyright 2016 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+############################################################################*/
+
+/*!
+* \file
+* \brief SHA256 implementation.
+*/
+#include "epid/common/math/hash.h"
+#include "ext/ipp/include/ippcp.h"
+
+EpidStatus Sha256MessageDigest(void const* msg, size_t len,
+                               Sha256Digest* digest) {
+  IppStatus sts;
+  int ipp_len = (int)len;
+
+  if ((len && !msg) || !digest) return kEpidBadArgErr;
+
+  if (INT_MAX < len) return kEpidBadArgErr;
+
+  sts = ippsSHA256MessageDigest(msg, ipp_len, (Ipp8u*)digest);
+  if (ippStsNoErr != sts) {
+    if (ippStsLengthErr == sts) {
+      return kEpidBadArgErr;
+    } else {
+      return kEpidMathErr;
+    }
+  }
+
+  return kEpidNoErr;
+}