func newReader(ctx context.Context, src io.Reader, size int64, md5Hex, sha256Hex string, actualSize int64, disableMD5 bool, forceMD5 []byte) (*Reader, error) {
	MD5, err := hex.DecodeString(md5Hex)
	if err != nil {
		return nil, BadDigest{ // TODO(aead): Return an error that indicates that an invalid ETag has been specified
			ExpectedMD5:   md5Hex,
			CalculatedMD5: "",
		}
	}
	SHA256, err := hex.DecodeString(sha256Hex)
	if err != nil {

			expectedError: hash.BadDigest{ExpectedMD5: invalidMD5, CalculatedMD5: getMD5Hash(data)},
		},
		24: {
			bucketName: bucket, objName: object, inputData: nilBytes, inputMeta: invalidMD5Header, inputDataSize: int64(len(nilBytes)), expectedMd5: getMD5Hash(nilBytes),
			expectedError: hash.BadDigest{ExpectedMD5: invalidMD5, CalculatedMD5: getMD5Hash(nilBytes)},
		},
		25: {

			actualSize: 4,
		},
		{
			desc:       "Failure md5 mismatch.",
			src:        bytes.NewReader([]byte("abcd")),
			size:       4,
			actualSize: 4,
			md5hex:     "d41d8cd98f00b204e9800998ecf8427f",
			err: BadDigest{
				"d41d8cd98f00b204e9800998ecf8427f",
				"e2fc714c4727ee9395f324cd2e7f331f",
			},
		},
		{
			desc:       "Failure sha256 mismatch.",
			src:        bytes.NewReader([]byte("abcd")),
			size:       4,