{
			bucketName: bucket, objName: object, uploadID: uploadID, PartID: 1, inputSHA256: "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b854",
			expectedError: hash.SHA256Mismatch{
				ExpectedSHA256:   "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b854",
				CalculatedSHA256: "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
			},
		},
		// Test case - 14.

	credentials auth.Credentials, t *testing.T,
) {
	_, err := obj.PutObject(GlobalContext, bucketName, "test-object", mustGetPutObjReader(t, bytes.NewReader([]byte{}), int64(0), "", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"), ObjectOptions{})
	// if object upload fails stop the test.
	if err != nil {
		t.Fatalf("Error uploading object: <ERROR> %v", err)
	}

		stringToSign = stringToSign + currTime.Format(iso8601Format) + "\n"
		stringToSign = stringToSign + scope + "\n"
		stringToSign = stringToSign + signature + "\n"
		stringToSign = stringToSign + "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855" + "\n" // hex(sum256(""))
		stringToSign += getSHA256Hash(buffer[:n])

		date := sumHMAC([]byte("AWS4"+secretKey), []byte(currTime.Format(yyyymmdd)))
		region := sumHMAC(date, []byte(regionStr))

	if s.signer == signerV4 {
		c.Assert(request.Header.Get("x-amz-content-sha256"), "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
	}
	// Set the body to generate signature mismatch.
	helloReader := bytes.NewReader([]byte("Hello, World"))
	request.ContentLength = helloReader.Size()