[FAB-4071] Write unit tests for bccsp package

The package has no unit tests and therefore has a code coverage of 0%.
I wrote unit tests and it's now 100%.

Change-Id: I0aff974ced924704ca8bf2ca3e5636df29f73113
Signed-off-by: Yacov Manevich <yacovm@il.ibm.com>

bccsp/bccsp_test.go

@@ -0,0 +1,157 @@
+/*
+Copyright IBM Corp. 2017 All Rights Reserved.
+
+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.
+*/
+
+package bccsp
+
+import (
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAESOpts(t *testing.T) {
+	test := func(ephemeral bool) {
+		for _, opts := range []KeyGenOpts{
+			&AES128KeyGenOpts{ephemeral},
+			&AES192KeyGenOpts{ephemeral},
+			&AES256KeyGenOpts{ephemeral},
+		} {
+			expectedAlgorithm := reflect.TypeOf(opts).String()[7:13]
+			assert.Equal(t, expectedAlgorithm, opts.Algorithm())
+			assert.Equal(t, ephemeral, opts.Ephemeral())
+		}
+	}
+	test(true)
+	test(false)
+
+	opts := &AESKeyGenOpts{true}
+	assert.Equal(t, "AES", opts.Algorithm())
+	assert.True(t, opts.Ephemeral())
+	opts.Temporary = false
+	assert.False(t, opts.Ephemeral())
+}
+
+func TestRSAOpts(t *testing.T) {
+	test := func(ephemeral bool) {
+		for _, opts := range []KeyGenOpts{
+			&RSA1024KeyGenOpts{ephemeral},
+			&RSA2048KeyGenOpts{ephemeral},
+			&RSA3072KeyGenOpts{ephemeral},
+			&RSA4096KeyGenOpts{ephemeral},
+		} {
+			expectedAlgorithm := reflect.TypeOf(opts).String()[7:14]
+			assert.Equal(t, expectedAlgorithm, opts.Algorithm())
+			assert.Equal(t, ephemeral, opts.Ephemeral())
+		}
+	}
+	test(true)
+	test(false)
+}
+
+func TestECDSAOpts(t *testing.T) {
+	test := func(ephemeral bool) {
+		for _, opts := range []KeyGenOpts{
+			&ECDSAP256KeyGenOpts{ephemeral},
+			&ECDSAP384KeyGenOpts{ephemeral},
+		} {
+			expectedAlgorithm := reflect.TypeOf(opts).String()[7:16]
+			assert.Equal(t, expectedAlgorithm, opts.Algorithm())
+			assert.Equal(t, ephemeral, opts.Ephemeral())
+		}
+	}
+	test(true)
+	test(false)
+
+	test = func(ephemeral bool) {
+		for _, opts := range []KeyGenOpts{
+			&ECDSAKeyGenOpts{ephemeral},
+			&ECDSAPKIXPublicKeyImportOpts{ephemeral},
+			&ECDSAPrivateKeyImportOpts{ephemeral},
+			&ECDSAGoPublicKeyImportOpts{ephemeral},
+		} {
+			assert.Equal(t, "ECDSA", opts.Algorithm())
+			assert.Equal(t, ephemeral, opts.Ephemeral())
+		}
+	}
+	test(true)
+	test(false)
+
+	opts := &ECDSAReRandKeyOpts{Temporary: true}
+	assert.True(t, opts.Ephemeral())
+	opts.Temporary = false
+	assert.False(t, opts.Ephemeral())
+	assert.Equal(t, "ECDSA_RERAND", opts.Algorithm())
+	assert.Empty(t, opts.ExpansionValue())
+}
+
+func TestHashOpts(t *testing.T) {
+	for _, ho := range []HashOpts{&SHA256Opts{}, &SHA384Opts{}, &SHA3_256Opts{}, &SHA3_384Opts{}} {
+		s := strings.Replace(reflect.TypeOf(ho).String(), "*bccsp.", "", -1)
+		algorithm := strings.Replace(s, "Opts", "", -1)
+		assert.Equal(t, algorithm, ho.Algorithm())
+		ho2, err := GetHashOpt(algorithm)
+		assert.NoError(t, err)
+		assert.Equal(t, ho.Algorithm(), ho2.Algorithm())
+	}
+	_, err := GetHashOpt("foo")
+	assert.Error(t, err)
+	assert.Contains(t, err.Error(), "hash function not recognized")
+
+	assert.Equal(t, "SHA", (&SHAOpts{}).Algorithm())
+}
+
+func TestHMAC(t *testing.T) {
+	opts := &HMACTruncated256AESDeriveKeyOpts{Arg: []byte("arg")}
+	assert.False(t, opts.Ephemeral())
+	opts.Temporary = true
+	assert.True(t, opts.Ephemeral())
+	assert.Equal(t, "HMAC_TRUNCATED_256", opts.Algorithm())
+	assert.Equal(t, []byte("arg"), opts.Argument())
+
+	opts2 := &HMACDeriveKeyOpts{Arg: []byte("arg")}
+	assert.False(t, opts2.Ephemeral())
+	opts2.Temporary = true
+	assert.True(t, opts2.Ephemeral())
+	assert.Equal(t, "HMAC", opts2.Algorithm())
+	assert.Equal(t, []byte("arg"), opts2.Argument())
+}
+
+func TestKeyGenOpts(t *testing.T) {
+	expectedAlgorithms := map[reflect.Type]string{
+		reflect.TypeOf(&HMACImportKeyOpts{}):        "HMAC",
+		reflect.TypeOf(&RSAKeyGenOpts{}):            "RSA",
+		reflect.TypeOf(&RSAGoPublicKeyImportOpts{}): "RSA",
+		reflect.TypeOf(&X509PublicKeyImportOpts{}):  "X509Certificate",
+		reflect.TypeOf(&AES256ImportKeyOpts{}):      "AES",
+	}
+	test := func(ephemeral bool) {
+		for _, opts := range []KeyGenOpts{
+			&HMACImportKeyOpts{ephemeral},
+			&RSAKeyGenOpts{ephemeral},
+			&RSAGoPublicKeyImportOpts{ephemeral},
+			&X509PublicKeyImportOpts{ephemeral},
+			&AES256ImportKeyOpts{ephemeral},
+		} {
+			expectedAlgorithm := expectedAlgorithms[reflect.TypeOf(opts)]
+			assert.Equal(t, expectedAlgorithm, opts.Algorithm())
+			assert.Equal(t, ephemeral, opts.Ephemeral())
+		}
+	}
+	test(true)
+	test(false)
+}