[FAB-1746] Add util method for policy config items

https://jira.hyperledger.org/browse/FAB-1746

This changeset completes the pattern of providing utility methods in the
consumer packages for configuration transaction artifacts by
implementing this for the signature policy.

Change-Id: Ie74f366f7df2b64fd5fbc245dbd17f5cf61378d3
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

common/cauthdsl/policy_util.go

@@ -0,0 +1,34 @@
+/*
+Copyright IBM Corp. 2016 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 cauthdsl
+
+import (
+	cb "github.com/hyperledger/fabric/protos/common"
+	"github.com/hyperledger/fabric/protos/utils"
+)
+
+// TemplatePolicy creates a headerless configuration item representing a policy for a given key
+func TemplatePolicy(key string, sigPolicyEnv *cb.SignaturePolicyEnvelope) *cb.ConfigurationItem {
+	return &cb.ConfigurationItem{
+		Type: cb.ConfigurationItem_Policy,
+		Key:  key,
+		Value: utils.MarshalOrPanic(&cb.Policy{
+			Type:   int32(cb.Policy_SIGNATURE),
+			Policy: utils.MarshalOrPanic(sigPolicyEnv),
+		}),
+	}
+}

orderer/common/bootstrap/provisional/item.go

@@ -21,7 +21,6 @@ import (
 	"github.com/hyperledger/fabric/common/configtx"
 	"github.com/hyperledger/fabric/orderer/common/sharedconfig"
 	cb "github.com/hyperledger/fabric/protos/common"
-	"github.com/hyperledger/fabric/protos/utils"
 )
 
 func (cbs *commonBootstrapper) templateConsensusType() *cb.ConfigurationItem {
@@ -41,12 +40,7 @@ func (cbs *commonBootstrapper) templateChainCreationPolicyNames() *cb.Configurat
 }
 
 func (cbs *commonBootstrapper) templateAcceptAllPolicy() *cb.ConfigurationItem {
-	configItemKey := AcceptAllPolicyKey
-	configItemValue := utils.MarshalOrPanic(utils.MakePolicyOrPanic(cauthdsl.AcceptAllPolicy))
-	modPolicy := configtx.NewConfigurationItemPolicyKey
-
-	configItemChainHeader := utils.MakeChainHeader(cb.HeaderType_CONFIGURATION_ITEM, msgVersion, cbs.chainID, epoch)
-	return utils.MakeConfigurationItem(configItemChainHeader, cb.ConfigurationItem_Policy, lastModified, modPolicy, configItemKey, configItemValue)
+	return cauthdsl.TemplatePolicy(AcceptAllPolicyKey, cauthdsl.AcceptAllPolicy)
 }
 
 func (cbs *commonBootstrapper) templateIngressPolicyNames() *cb.ConfigurationItem {
@@ -59,12 +53,7 @@ func (cbs *commonBootstrapper) templateEgressPolicyNames() *cb.ConfigurationItem
 
 func (cbs *commonBootstrapper) templateRejectAllPolicy() *cb.ConfigurationItem {
 	// Lock down the new configuration item policy to prevent any new configuration items from being created
-	configItemKey := configtx.NewConfigurationItemPolicyKey
-	configItemValue := utils.MarshalOrPanic(utils.MakePolicyOrPanic(cauthdsl.RejectAllPolicy))
-	modPolicy := configtx.NewConfigurationItemPolicyKey
-
-	configItemChainHeader := utils.MakeChainHeader(cb.HeaderType_CONFIGURATION_ITEM, msgVersion, cbs.chainID, epoch)
-	return utils.MakeConfigurationItem(configItemChainHeader, cb.ConfigurationItem_Policy, lastModified, modPolicy, configItemKey, configItemValue)
+	return cauthdsl.TemplatePolicy(configtx.NewConfigurationItemPolicyKey, cauthdsl.RejectAllPolicy)
 }
 
 func (kbs *kafkaBootstrapper) templateKafkaBrokers() *cb.ConfigurationItem {