policy-engine/iam/converter_test.go

package iam

import (
	"testing"

	policyengine "git.frostfs.info/TrueCloudLab/policy-engine"
	"github.com/stretchr/testify/require"
)

func TestConverters(t *testing.T) {
	t.Run("valid policy", func(t *testing.T) {
		p := Policy{
			Version: "2012-10-17",
			Statement: []Statement{{
				Principal: map[PrincipalType][]string{
					AWSPrincipalType: {"arn:aws:iam::111122223333:user/JohnDoe"},
				},
				Effect:   AllowEffect,
				Action:   []string{"s3:PutObject"},
				Resource: []string{"arn:aws:s3:::DOC-EXAMPLE-BUCKET/*"},
				Conditions: map[string]Condition{
					CondStringEquals: {
						"s3:RequestObjectTag/Department": {"Finance"},
					},
				},
			}},
		}

		expected := &policyengine.Chain{Rules: []policyengine.Rule{
			{
				Status:    policyengine.Allow,
				Actions:   policyengine.Actions{Names: p.Statement[0].Action},
				Resources: policyengine.Resources{Names: p.Statement[0].Resource},
				Any:       true,
				Condition: []policyengine.Condition{
					{
						Op:     policyengine.CondStringEquals,
						Object: policyengine.ObjectRequest,
						Key:    RequestOwnerProperty,
						Value:  "arn:aws:iam::111122223333:user/JohnDoe",
					},
					{
						Op:     policyengine.CondStringEquals,
						Object: policyengine.ObjectRequest,
						Key:    "s3:RequestObjectTag/Department",
						Value:  "Finance",
					},
				},
			},
		}}

		chain, err := p.ToChain()
		require.NoError(t, err)
		require.Equal(t, expected, chain)
	})

	t.Run("valid inverted policy", func(t *testing.T) {
		p := Policy{
			Version: "2012-10-17",
			Statement: []Statement{{
				NotPrincipal: map[PrincipalType][]string{
					AWSPrincipalType: {"arn:aws:iam::111122223333:user/JohnDoe"},
				},
				Effect:      DenyEffect,
				NotAction:   []string{"s3:PutObject"},
				NotResource: []string{"arn:aws:s3:::DOC-EXAMPLE-BUCKET/*"},
			}},
		}

		expected := &policyengine.Chain{Rules: []policyengine.Rule{
			{
				Status:    policyengine.AccessDenied,
				Actions:   policyengine.Actions{Inverted: true, Names: p.Statement[0].NotAction},
				Resources: policyengine.Resources{Inverted: true, Names: p.Statement[0].NotResource},
				Any:       true,
				Condition: []policyengine.Condition{
					{
						Op:     policyengine.CondStringNotEquals,
						Object: policyengine.ObjectRequest,
						Key:    RequestOwnerProperty,
						Value:  "arn:aws:iam::111122223333:user/JohnDoe",
					},
				},
			},
		}}

		chain, err := p.ToChain()
		require.NoError(t, err)
		require.Equal(t, expected, chain)
	})

	t.Run("invalid policy (unsupported principal type)", func(t *testing.T) {
		p := Policy{
			Version: "2012-10-17",
			Statement: []Statement{{
				Principal: map[PrincipalType][]string{
					"dummy": {"arn:aws:iam::111122223333:user/JohnDoe"},
				},
				Effect:   AllowEffect,
				Action:   []string{"s3:PutObject"},
				Resource: []string{"arn:aws:s3:::DOC-EXAMPLE-BUCKET/*"},
			}},
		}

		_, err := p.ToChain()
		require.Error(t, err)
	})

	t.Run("invalid policy (missing resource)", func(t *testing.T) {
		p := Policy{
			Version: "2012-10-17",
			Statement: []Statement{{
				Principal: map[PrincipalType][]string{
					AWSPrincipalType: {"arn:aws:iam::111122223333:user/JohnDoe"},
				},
				Effect: AllowEffect,
				Action: []string{"s3:PutObject"},
			}},
		}

		_, err := p.ToChain()
		require.Error(t, err)
	})

	t.Run("check policy conditions", func(t *testing.T) {
		p := Policy{
			Version: "2012-10-17",
			Statement: []Statement{{
				Principal: map[PrincipalType][]string{Wildcard: nil},
				Effect:    AllowEffect,
				Action:    []string{"s3:PutObject"},
				Resource:  []string{"arn:aws:s3:::DOC-EXAMPLE-BUCKET/*"},
				Conditions: Conditions{
					CondStringEquals:              {"key1": {"val0", "val1"}},
					CondStringNotEquals:           {"key2": {"val2"}},
					CondStringEqualsIgnoreCase:    {"key3": {"val3"}},
					CondStringNotEqualsIgnoreCase: {"key4": {"val4"}},
					CondStringLike:                {"key5": {"val5"}},
					CondStringNotLike:             {"key6": {"val6"}},
					CondDateEquals:                {"key7": {"2006-01-02T15:04:05+07:00"}},
					CondDateNotEquals:             {"key8": {"2006-01-02T15:04:05Z"}},
					CondDateLessThan:              {"key9": {"2006-01-02T15:04:05+06:00"}},
					CondDateLessThanEquals:        {"key10": {"2006-01-02T15:04:05+03:00"}},
					CondDateGreaterThan:           {"key11": {"2006-01-02T15:04:05-01:00"}},
					CondDateGreaterThanEquals:     {"key12": {"2006-01-02T15:04:05-03:00"}},
					CondBool:                      {"key13": {"True"}},
					CondIPAddress:                 {"key14": {"val14"}},
					CondNotIPAddress:              {"key15": {"val15"}},
					CondArnEquals:                 {"key16": {"val16"}},
					CondArnLike:                   {"key17": {"val17"}},
					CondArnNotEquals:              {"key18": {"val18"}},
					CondArnNotLike:                {"key19": {"val19"}},
				},
			}},
		}

		expected := &policyengine.Chain{Rules: []policyengine.Rule{
			{
				Status:    policyengine.Allow,
				Actions:   policyengine.Actions{Names: p.Statement[0].Action},
				Resources: policyengine.Resources{Names: p.Statement[0].Resource},
				Any:       true,
				Condition: []policyengine.Condition{
					{
						Op:     policyengine.CondStringLike,
						Object: policyengine.ObjectRequest,
						Key:    RequestOwnerProperty,
						Value:  "*",
					},
					{
						Op:     policyengine.CondStringEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key1",
						Value:  "val0",
					},
					{
						Op:     policyengine.CondStringEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key1",
						Value:  "val1",
					},
					{
						Op:     policyengine.CondStringNotEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key2",
						Value:  "val2",
					},
					{
						Op:     policyengine.CondStringEqualsIgnoreCase,
						Object: policyengine.ObjectRequest,
						Key:    "key3",
						Value:  "val3",
					},
					{
						Op:     policyengine.CondStringNotEqualsIgnoreCase,
						Object: policyengine.ObjectRequest,
						Key:    "key4",
						Value:  "val4",
					},
					{
						Op:     policyengine.CondStringLike,
						Object: policyengine.ObjectRequest,
						Key:    "key5",
						Value:  "val5",
					},
					{
						Op:     policyengine.CondStringNotLike,
						Object: policyengine.ObjectRequest,
						Key:    "key6",
						Value:  "val6",
					},
					{
						Op:     policyengine.CondStringEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key7",
						Value:  "1136189045",
					},
					{
						Op:     policyengine.CondStringNotEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key8",
						Value:  "1136214245",
					},
					{
						Op:     policyengine.CondStringLessThan,
						Object: policyengine.ObjectRequest,
						Key:    "key9",
						Value:  "1136192645",
					},
					{
						Op:     policyengine.CondStringLessThanEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key10",
						Value:  "1136203445",
					},
					{
						Op:     policyengine.CondStringGreaterThan,
						Object: policyengine.ObjectRequest,
						Key:    "key11",
						Value:  "1136217845",
					},
					{
						Op:     policyengine.CondStringGreaterThanEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key12",
						Value:  "1136225045",
					},
					{
						Op:     policyengine.CondStringEqualsIgnoreCase,
						Object: policyengine.ObjectRequest,
						Key:    "key13",
						Value:  "True",
					},
					{
						Op:     policyengine.CondStringLike,
						Object: policyengine.ObjectRequest,
						Key:    "key14",
						Value:  "val14",
					},
					{
						Op:     policyengine.CondStringNotLike,
						Object: policyengine.ObjectRequest,
						Key:    "key15",
						Value:  "val15",
					},
					{
						Op:     policyengine.CondStringEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key16",
						Value:  "val16",
					},
					{
						Op:     policyengine.CondStringLike,
						Object: policyengine.ObjectRequest,
						Key:    "key17",
						Value:  "val17",
					},
					{
						Op:     policyengine.CondStringNotEquals,
						Object: policyengine.ObjectRequest,
						Key:    "key18",
						Value:  "val18",
					},
					{
						Op:     policyengine.CondStringNotLike,
						Object: policyengine.ObjectRequest,
						Key:    "key19",
						Value:  "val19",
					},
				},
			},
		}}

		chain, err := p.ToChain()
		require.NoError(t, err)

		for i, rule := range chain.Rules {
			expectedRule := expected.Rules[i]
			require.Equal(t, expectedRule.Actions, rule.Actions)
			require.Equal(t, expectedRule.Any, rule.Any)
			require.Equal(t, expectedRule.Resources, rule.Resources)
			require.Equal(t, expectedRule.Status, rule.Status)
			require.ElementsMatch(t, expectedRule.Condition, rule.Condition)
		}
	})
}