[FABG-787] Add defaults for cryptoconfig

Change-Id: I43194d0831fa71198e0f45046c15463670ec6262
Signed-off-by: Nye Liu <nye@blockdaemon.com>

pkg/core/cryptosuite/cryptoconfig.go

@@ -14,6 +14,15 @@ import (
 	"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/core"
 	"github.com/hyperledger/fabric-sdk-go/pkg/core/config/lookup"
 	"github.com/hyperledger/fabric-sdk-go/pkg/util/pathvar"
+	"github.com/spf13/cast"
+)
+
+const (
+	defEnabled       = true
+	defHashAlgorithm = "SHA2"
+	defLevel         = 256
+	defProvider      = "SW"
+	defSoftVerify    = true
 )
 
 //ConfigFromBackend returns CryptoSuite config implementation for given backend
@@ -26,29 +35,49 @@ type Config struct {
 	backend *lookup.ConfigLookup
 }
 
-// IsSecurityEnabled config used enable and diable security in cryptosuite
+// IsSecurityEnabled config used enable and disable security in cryptosuite
 func (c *Config) IsSecurityEnabled() bool {
-	return c.backend.GetBool("client.BCCSP.security.enabled")
+	val, ok := c.backend.Lookup("client.BCCSP.security.enabled")
+	if !ok {
+		return defEnabled
+	}
+	return cast.ToBool(val)
 }
 
 // SecurityAlgorithm returns cryptoSuite config hash algorithm
 func (c *Config) SecurityAlgorithm() string {
-	return c.backend.GetString("client.BCCSP.security.hashAlgorithm")
+	val, ok := c.backend.Lookup("client.BCCSP.security.hashAlgorithm")
+	if !ok {
+		return defHashAlgorithm
+	}
+	return cast.ToString(val)
 }
 
 // SecurityLevel returns cryptSuite config security level
 func (c *Config) SecurityLevel() int {
-	return c.backend.GetInt("client.BCCSP.security.level")
+	val, ok := c.backend.Lookup("client.BCCSP.security.level")
+	if !ok {
+		return defLevel
+	}
+	return cast.ToInt(val)
 }
 
 //SecurityProvider provider SW or PKCS11
 func (c *Config) SecurityProvider() string {
-	return c.backend.GetLowerString("client.BCCSP.security.default.provider")
+	val, ok := c.backend.Lookup("client.BCCSP.security.default.provider")
+	if !ok {
+		return strings.ToLower(defProvider)
+	}
+	return strings.ToLower(cast.ToString(val))
 }
 
 //SoftVerify flag
 func (c *Config) SoftVerify() bool {
-	return c.backend.GetBool("client.BCCSP.security.softVerify")
+	val, ok := c.backend.Lookup("client.BCCSP.security.softVerify")
+	if !ok {
+		return defSoftVerify
+	}
+	return cast.ToBool(val)
 }
 
 //SecurityProviderLibPath will be set only if provider is PKCS11

pkg/core/cryptosuite/cryptoconfig_test.go

@@ -21,6 +21,22 @@ import (
 )
 
 const configTestFilePath = "../config/testdata/config_test.yaml"
+const configEmptyTestFilePath = "../config/testdata/viper-test.yaml"
+
+func TestEmptyTestFile(t *testing.T) {
+	backend, err := config.FromFile(configEmptyTestFilePath)()
+	assert.Nil(t, err, "Failed to read from empty config")
+
+	cryptoConfig := ConfigFromBackend(backend[0]).(*Config)
+
+	// Test for defaults
+	assert.Equal(t, true, cryptoConfig.IsSecurityEnabled())
+	assert.Equal(t, "SHA2", cryptoConfig.SecurityAlgorithm())
+	assert.Equal(t, 256, cryptoConfig.SecurityLevel())
+	// Note that we transform to lower case in SecurityProvider()
+	assert.Equal(t, "sw", cryptoConfig.SecurityProvider())
+	assert.Equal(t, true, cryptoConfig.SoftVerify())
+}
 
 func TestCAConfigKeyStorePath(t *testing.T) {
 	backend, err := config.FromFile(configTestFilePath)()

pkg/fabsdk/fabsdk_test.go

@@ -18,6 +18,7 @@ import (
 	mockapisdk "github.com/hyperledger/fabric-sdk-go/pkg/fabsdk/test/mocksdkapi"
 	"github.com/hyperledger/fabric-sdk-go/pkg/msp"
 	"github.com/pkg/errors"
+	"github.com/stretchr/testify/assert"
 )
 
 const (
@@ -266,11 +267,9 @@ func TestWithConfigFailure(t *testing.T) {
 	}
 }
 
-func TestBadConfigFile(t *testing.T) {
+func TestEmptyConfigFile(t *testing.T) {
 	_, err := New(configImpl.FromFile("../../pkg/core/config/testdata/viper-test.yaml"))
-	if err == nil {
-		t.Fatal("Expected error from New with bad config file")
-	}
+	assert.Nil(t, err, "New with empty config file should not have failed")
 }
 
 func TestWithConfigEndpoint(t *testing.T) {