1 /*############################################################################
2 # Copyright 2016-2017 Intel Corporation
3 #
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
7 #
8 # http://www.apache.org/licenses/LICENSE-2.0
9 #
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
15 ############################################################################*/
16
17 /*!
18 * \file
19 * \brief SHA256 implementation.
20 */
21 #include "epid/common/math/hash.h"
22 #include "epid/common/math/src/bignum-internal.h"
23 #include "ext/ipp/include/ippcp.h"
24
Sha256MessageDigest(void const * msg,size_t len,Sha256Digest * digest)25 EpidStatus Sha256MessageDigest(void const* msg, size_t len,
26 Sha256Digest* digest) {
27 IppStatus sts;
28 int ipp_len = (int)len;
29
30 if ((len && !msg) || !digest) return kEpidBadArgErr;
31
32 if (INT_MAX < len) return kEpidBadArgErr;
33
34 sts = ippsSHA256MessageDigest(msg, ipp_len, (IppOctStr)digest);
35 if (ippStsNoErr != sts) {
36 if (ippStsLengthErr == sts) {
37 return kEpidBadArgErr;
38 } else {
39 return kEpidMathErr;
40 }
41 }
42
43 return kEpidNoErr;
44 }
45