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aws_policy_equivalence_test.go
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package awspolicy
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
import (
"encoding/json"
"testing"
)
func TestPolicyEquivalence(t *testing.T) {
cases := []struct {
name string
policy1 string
policy2 string
equivalent bool
err bool
}{
{
name: "Invalid policy JSON",
policy1: policyTest0,
policy2: policyTest0,
equivalent: false,
err: true,
},
{
name: "Identical policy text",
policy1: policyTest1,
policy2: policyTest1,
equivalent: true,
},
{
name: "Action block as single item array versus string",
policy1: policyTest2a,
policy2: policyTest2b,
equivalent: true,
},
{
name: "Action block as single item array versus string, different action",
policy1: policyTest3a,
policy2: policyTest3b,
equivalent: false,
},
{
name: "NotAction block and ActionBlock, mixed string versus array",
policy1: policyTest4a,
policy2: policyTest4b,
equivalent: true,
},
{
name: "NotAction block on one side",
policy1: policyTest5a,
policy2: policyTest5b,
equivalent: false,
},
{
name: "Principal in single item array versus string",
policy1: policyTest6a,
policy2: policyTest6b,
equivalent: true,
},
{
name: "Different principal in single item array versus string",
policy1: policyTest7a,
policy2: policyTest7b,
equivalent: false,
},
{
name: "String principal",
policy1: policyTest8a,
policy2: policyTest8b,
equivalent: true,
},
{
name: "String NotPrincipal",
policy1: policyTest9a,
policy2: policyTest9b,
equivalent: true,
},
{
name: "Different NotPrincipal in single item array versus string",
policy1: policyTest10a,
policy2: policyTest10b,
equivalent: false,
},
{
name: "Different Effect",
policy1: policyTest11a,
policy2: policyTest11b,
equivalent: false,
},
{
name: "Different Version",
policy1: policyTest12a,
policy2: policyTest12b,
equivalent: false,
},
{
name: "Same Condition",
policy1: policyTest13a,
policy2: policyTest13b,
equivalent: true,
},
{
name: "Different Condition",
policy1: policyTest14a,
policy2: policyTest14b,
equivalent: false,
},
{
name: "Condition in single string instead of array",
policy1: policyTest15a,
policy2: policyTest15b,
equivalent: true,
},
{
name: "Multiple Condition Blocks in one policy",
policy1: policyTest16a,
policy2: policyTest16b,
equivalent: false,
},
{
name: "Multiple Condition Blocks, same in both policies",
policy1: policyTest17a,
policy2: policyTest17b,
equivalent: true,
},
{
name: "Multiple Statements, Equivalent",
policy1: policyTest18a,
policy2: policyTest18b,
equivalent: true,
},
{
name: "Multiple Statements, missing one from policy 2",
policy1: policyTest19a,
policy2: policyTest19b,
equivalent: false,
},
{
name: "Casing of Effect",
policy1: policyTest20a,
policy2: policyTest20b,
equivalent: true,
},
{
name: "Single Statement vs []Statement",
policy1: policyTest21a,
policy2: policyTest21b,
equivalent: true,
},
{
name: "Empty Principal set",
policy1: policyTest22a,
policy2: policyTest22b,
equivalent: true,
},
{
name: "Empty Principals sets of different types have the same effect",
policy1: policyTest23a,
policy2: policyTest23b,
equivalent: true,
},
{
name: "Empty Principal and missing Principal have the same effect",
policy1: policyTest24a,
policy2: policyTest24b,
equivalent: true,
},
{
name: "Principal with empty sets and missing Principal have the same effect",
policy1: policyTest25a,
policy2: policyTest25b,
equivalent: true,
},
{
name: "Principal with string root IAM user matches account ID",
policy1: policyTest26a,
policy2: policyTest26b,
equivalent: true,
},
{
name: "Principal with map string root IAM user matches account ID",
policy1: policyTest27a,
policy2: policyTest27b,
equivalent: true,
},
{
name: "Principal with map array single root IAM user matches account ID",
policy1: policyTest28a,
policy2: policyTest28b,
equivalent: true,
},
{
name: "Principal with map array multiple root IAM user matches account ID",
policy1: policyTest29a,
policy2: policyTest29b,
equivalent: true,
},
{
name: "Missing Statement",
policy1: policyTest30,
policy2: policyTest30,
equivalent: true,
},
{
name: "Incorrect Statement type",
policy1: policyTest31,
policy2: policyTest31,
equivalent: true,
err: false,
},
{
name: "Incorrect single Resource type",
policy1: policyTest32,
policy2: policyTest32,
equivalent: true,
},
{
name: "Incorrect multiple Resource type",
policy1: policyTest33,
policy2: policyTest33,
equivalent: true,
},
{
name: "Principal order not important",
policy1: policyTest34a,
policy2: policyTest34b,
equivalent: true,
},
{
name: "Differences matter",
policy1: policyTest34b,
policy2: policyTest34c,
equivalent: false,
},
{
name: "Boolean condition with and without quotes on single value",
policy1: policyTest35a,
policy2: policyTest35b,
equivalent: true,
},
{
name: "Numeric condition with and without quotes on single value",
policy1: policyTest36a,
policy2: policyTest36b,
equivalent: true,
},
{
name: "Numeric condition with and without quotes on array of values",
policy1: policyTest37a,
policy2: policyTest37b,
equivalent: true,
},
{
name: "Condition containing empty array",
policy1: policyTest38a,
policy2: policyTest38b,
equivalent: true,
},
{
name: "Different empty lists",
policy1: policyTest39a,
policy2: policyTest39b,
equivalent: true,
},
{
name: "One-length lists",
policy1: policyTest40a,
policy2: policyTest40b,
equivalent: true,
},
{
name: "Equivalent assume-role policies 1",
policy1: policyTest41a,
policy2: policyTest41b,
equivalent: true,
},
{
name: "Equivalent assume-role policies 2",
policy1: policyTest42a,
policy2: policyTest42b,
equivalent: true,
},
{
name: "Not equivalent assume-role policies",
policy1: policyTest43a,
policy2: policyTest43b,
equivalent: false,
},
{
name: "Equivalence of emptiness",
policy1: policyTest44a,
policy2: policyTest44b,
equivalent: true,
},
}
for _, tc := range cases {
t.Run(tc.name, func(t *testing.T) {
equal, err := PoliciesAreEquivalent(tc.policy1, tc.policy2)
if !tc.err && err != nil {
t.Fatalf("Unexpected error: %s", err)
}
if tc.err && err == nil {
t.Fatal("Expected error, none produced")
}
if equal != tc.equivalent {
t.Fatalf("Bad: %s\n Expected: %t\n Got: %t\n", tc.name, tc.equivalent, equal)
}
})
}
}
const policyTest0 = `{
"Version": "2012-10-17",
"Statement": [
{
]
}`
const policyTest1 = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow", "Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest2a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest2b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": ["sts:AssumeRole"],
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
}
}
]
}`
const policyTest3a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest3b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": ["sts:GetSessionToken"],
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
}
}
]
}`
const policyTest4a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole",
"NotAction": ["sts:GetSessionToken"]
}
]
}`
const policyTest4b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": "sts:AssumeRole",
"NotAction": "sts:GetSessionToken",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
}
}
]
}`
const policyTest5a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest5b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": "sts:AssumeRole",
"NotAction": "sts:GetSessionToken",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
}
}
]
}`
const policyTest6a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest6b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": "sts:AssumeRole",
"Effect": "Allow",
"Principal": {
"Service": ["spotfleet.amazonaws.com"]
}
}
]
}`
const policyTest7a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "ec2.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest7b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": "sts:AssumeRole",
"Effect": "Allow",
"Principal": {
"Service": ["spotfleet.amazonaws.com"]
}
}
]
}`
const policyTest8a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": "*",
"Action": "sts:AssumeRole"
}
]
}`
const policyTest8b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": "sts:AssumeRole",
"Effect": "Allow",
"Principal": "*"
}
]
}`
const policyTest9a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"NotPrincipal": "*",
"Action": "sts:AssumeRole"
}
]
}`
const policyTest9b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": "sts:AssumeRole",
"Effect": "Allow",
"NotPrincipal": "*"
}
]
}`
const policyTest10a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"NotPrincipal": {
"Service": "ec2.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest10b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Action": "sts:AssumeRole",
"Effect": "Allow",
"NotPrincipal": {
"Service": ["spotfleet.amazonaws.com"]
}
}
]
}`
const policyTest11a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest11b = `{
"Version": "2012-06-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest12a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Deny",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest12b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "spotfleet.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
const policyTest13a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition": {
"StringEquals": {
"s3:x-amz-acl": [
"public-read"
]
}
}
}
]
}`
const policyTest13b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition": {
"StringEquals": {
"s3:x-amz-acl": [
"public-read"
]
}
}
}
]
}`
const policyTest14a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition": {
"StringNotEquals": {
"s3:x-amz-acl": [
"public-read"
]
}
}
}
]
}`
const policyTest14b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition": {
"StringEquals": {
"s3:x-amz-acl": [
"public-read"
]
}
}
}
]
}`
const policyTest15a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition": {
"StringEquals": {
"s3:x-amz-acl": "public-read"
}
}
}
]
}`
const policyTest15b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition": {
"StringEquals": {
"s3:x-amz-acl": [
"public-read"
]
}
}
}
]
}`
const policyTest16a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition": {
"StringEquals": {
"s3:x-amz-acl": "public-read"
}
}
}
]
}`
const policyTest16b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition" : {
"DateGreaterThan" : {
"aws:CurrentTime" : "2013-08-16T12:00:00Z"
},
"DateLessThan": {
"aws:CurrentTime" : "2013-08-16T15:00:00Z"
},
"IpAddress" : {
"aws:SourceIp" : ["192.0.2.0/24", "203.0.113.0/24"]
}
}
}
]
}`
const policyTest17a = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition" : {
"DateGreaterThan" : {
"aws:CurrentTime" : "2013-08-16T12:00:00Z"
},
"DateLessThan": {
"aws:CurrentTime" : "2013-08-16T15:00:00Z"
},
"IpAddress" : {
"aws:SourceIp" : ["192.0.2.0/24", "203.0.113.0/24"]
}
}
}
]
}`
const policyTest17b = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "statement1",
"Effect": "Allow",
"Action": [
"s3:PutObject"
],
"Resource": [
"arn:aws:s3:::examplebucket/*"
],
"Condition" : {
"DateGreaterThan" : {
"aws:CurrentTime" : "2013-08-16T12:00:00Z"
},
"DateLessThan": {
"aws:CurrentTime" : "2013-08-16T15:00:00Z"
},
"IpAddress" : {
"aws:SourceIp" : ["192.0.2.0/24", "203.0.113.0/24"]
}
}
}
]
}`
const policyTest18a = `{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:ListAllMyBuckets",
"s3:GetBucketLocation"
],
"Resource": "arn:aws:s3:::*"
},
{
"Effect": "Allow",
"Action": "s3:ListBucket",
"Resource": "arn:aws:s3:::BUCKET-NAME",
"Condition": {"StringLike": {"s3:prefix": [
"",
"home/",
"home/${aws:username}/"
]}}
},
{
"Effect": "Allow",
"Action": "s3:*",
"Resource": [
"arn:aws:s3:::BUCKET-NAME/home/${aws:username}",
"arn:aws:s3:::BUCKET-NAME/home/${aws:username}/*"
]
}
]
}`
const policyTest18b = `{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:ListAllMyBuckets",
"s3:GetBucketLocation"
],
"Resource": "arn:aws:s3:::*"
},
{
"Effect": "Allow",
"Action": "s3:ListBucket",
"Resource": "arn:aws:s3:::BUCKET-NAME",
"Condition": {"StringLike": {"s3:prefix": [
"",
"home/",
"home/${aws:username}/"
]}}
},
{
"Effect": "Allow",
"Action": "s3:*",
"Resource": [
"arn:aws:s3:::BUCKET-NAME/home/${aws:username}",
"arn:aws:s3:::BUCKET-NAME/home/${aws:username}/*"
]
}
]
}`
const policyTest19a = `{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:ListAllMyBuckets",
"s3:GetBucketLocation"
],
"Resource": "arn:aws:s3:::*"
},
{
"Effect": "Allow",
"Action": "s3:*",
"Resource": [
"arn:aws:s3:::BUCKET-NAME/home/${aws:username}",
"arn:aws:s3:::BUCKET-NAME/home/${aws:username}/*"
]
},
{
"Effect": "Allow",
"Action": "s3:ListBucket",
"Resource": "arn:aws:s3:::BUCKET-NAME",
"Condition": {"StringLike": {"s3:prefix": [
"",
"home/",
"home/${aws:username}/"
]}}
}
]
}`
const policyTest19b = `{