[#80] iam: Skip unsupported conditions in native chains

Skip conditions with
* aws:RequestTag
* aws:ResourceTag
keys

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

iam/converter.go

@@ -69,6 +69,8 @@ const (
 	condKeyAWSPrincipalARN       = "aws:PrincipalArn"
 	condKeyAWSSourceIP           = "aws:SourceIp"
 	condKeyAWSPrincipalTagPrefix = "aws:PrincipalTag/"
+	condKeyAWSRequestTagPrefix   = "aws:RequestTag/"
+	condKeyAWSResourceTagPrefix  = "aws:ResourceTag/"
 	userClaimTagPrefix           = "tag-"
 )
 

iam/converter_native.go

@@ -224,21 +224,32 @@ func getNativePrincipalsAndConditionFunc(statement Statement, resolver NativeRes
 
 func convertToNativeChainCondition(c Conditions, resolver NativeResolver) ([]GroupedConditions, error) {
 	return convertToChainConditions(c, func(gr GroupedConditions) (GroupedConditions, error) {
-		for i := range gr.Conditions {
-			if gr.Conditions[i].Key == condKeyAWSMFAPresent {
-				return GroupedConditions{}, errConditionKeyNotApplicable
+		res := GroupedConditions{
+			Conditions: make([]chain.Condition, 0, len(gr.Conditions)),
+			Any:        gr.Any,
 		}
-			if gr.Conditions[i].Key == condKeyAWSPrincipalARN {
+
+		for i := range gr.Conditions {
+			switch {
+			case gr.Conditions[i].Key == condKeyAWSMFAPresent:
+				return GroupedConditions{}, errConditionKeyNotApplicable
+			case gr.Conditions[i].Key == condKeyAWSPrincipalARN:
 				gr.Conditions[i].Key = native.PropertyKeyActorPublicKey
 				val, err := formPrincipalKey(gr.Conditions[i].Value, resolver)
 				if err != nil {
 					return GroupedConditions{}, err
 				}
 				gr.Conditions[i].Value = val
+				res.Conditions = append(res.Conditions, gr.Conditions[i])
+			case strings.HasPrefix(gr.Conditions[i].Key, condKeyAWSRequestTagPrefix) ||
+				strings.HasPrefix(gr.Conditions[i].Key, condKeyAWSResourceTagPrefix):
+				continue
+			default:
+				res.Conditions = append(res.Conditions, gr.Conditions[i])
 			}
 		}
 
-		return gr, nil
+		return res, nil
 	})
 }
 

iam/converter_test.go

@@ -1696,7 +1696,7 @@ func TestTagsConditions(t *testing.T) {
 }
 `
 
-	expectedConditions := []chain.Condition{
+	expectedS3Conditions := []chain.Condition{
 		{
 			Op:    chain.CondStringEquals,
 			Kind:  chain.KindRequest,
@@ -1717,6 +1717,15 @@ func TestTagsConditions(t *testing.T) {
 		},
 	}
 
+	expectedNativeConditions := []chain.Condition{
+		{
+			Op:    chain.CondStringEquals,
+			Kind:  chain.KindRequest,
+			Key:   fmt.Sprintf(common.PropertyKeyFormatFrostFSIDUserClaim, "tag-department"),
+			Value: "hr",
+		},
+	}
+
 	var p Policy
 	err := json.Unmarshal([]byte(policy), &p)
 	require.NoError(t, err)
@@ -1724,12 +1733,12 @@ func TestTagsConditions(t *testing.T) {
 	s3Chain, err := ConvertToS3Chain(p, newMockUserResolver(nil, nil, ""))
 	require.NoError(t, err)
 	require.Len(t, s3Chain.Rules, 1)
-	require.ElementsMatch(t, expectedConditions, s3Chain.Rules[0].Condition)
+	require.ElementsMatch(t, expectedS3Conditions, s3Chain.Rules[0].Condition)
 
 	nativeChain, err := ConvertToNativeChain(p, newMockUserResolver(nil, nil, ""))
 	require.NoError(t, err)
 	require.Len(t, nativeChain.Rules, 1)
-	require.ElementsMatch(t, expectedConditions, nativeChain.Rules[0].Condition)
+	require.ElementsMatch(t, expectedNativeConditions, nativeChain.Rules[0].Condition)
 }
 
 func TestMFACondition(t *testing.T) {