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fix: Handle expiration dates in the far future (#418)
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* chore: add a far future key to sa key age test

* fix(GCPIAMRestrictServiceAccountKeyAgeConstraintV1): handle expiration dates in the far future
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@morgante
morgante committed Dec 6, 2021
1 parent c873feb commit b6ca0f4
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Showing 4 changed files with 47 additions and 12 deletions.
15 changes: 11 additions & 4 deletions policies/templates/gcp_iam_restrict_service_account_key_age_v1.yaml
View file
Expand Up @@ -67,16 +67,23 @@ spec:
metadata := {"resource": asset.name}
}
check_key_not_expired(key) = check_key_not_expired {
check_key_not_expired(key) {
expiry_time := time.parse_rfc3339_ns(lib.get_default(key, "validBeforeTime", "1900-01-01T01:00:006Z"))
expiry_time >= 0
now := time.now_ns()
check_key_not_expired := now < expiry_time
now < expiry_time
}
check_key_age(key, max_age) = check_key_age {
# Workaround for dates in the far future - https://github.com/open-policy-agent/opa/issues/4098
check_key_not_expired(key) {
expiry_time := time.parse_rfc3339_ns(lib.get_default(key, "validBeforeTime", "1900-01-01T01:00:006Z"))
expiry_time < 0
}
check_key_age(key, max_age) {
created_time := time.parse_rfc3339_ns(lib.get_default(key, "validAfterTime", "2200-01-01T01:00:006Z"))
max_age_parsed := time.parse_duration_ns(max_age)
key_age := time.now_ns() - created_time
check_key_age := key_age > max_age_parsed
key_age > max_age_parsed
}
#ENDINLINE
15 changes: 11 additions & 4 deletions validator/gcp_iam_restrict_service_account_key_age.rego
View file
Expand Up @@ -35,15 +35,22 @@ deny[{
metadata := {"resource": asset.name}
}

check_key_not_expired(key) = check_key_not_expired {
check_key_not_expired(key) {
expiry_time := time.parse_rfc3339_ns(lib.get_default(key, "validBeforeTime", "1900-01-01T01:00:006Z"))
expiry_time >= 0
now := time.now_ns()
check_key_not_expired := now < expiry_time
now < expiry_time
}

check_key_age(key, max_age) = check_key_age {
# Workaround for dates in the far future - https://github.com/open-policy-agent/opa/issues/4098
check_key_not_expired(key) {
expiry_time := time.parse_rfc3339_ns(lib.get_default(key, "validBeforeTime", "1900-01-01T01:00:006Z"))
expiry_time < 0
}

check_key_age(key, max_age) {
created_time := time.parse_rfc3339_ns(lib.get_default(key, "validAfterTime", "2200-01-01T01:00:006Z"))
max_age_parsed := time.parse_duration_ns(max_age)
key_age := time.now_ns() - created_time
check_key_age := key_age > max_age_parsed
key_age > max_age_parsed
}
18 changes: 14 additions & 4 deletions validator/gcp_iam_restrict_service_account_key_age_test.rego
View file
Expand Up @@ -24,20 +24,30 @@ import data.test.fixtures.gcp_iam_restrict_service_account_key_age.constraints a

# Confirm total violations count
test_service_account_key_age_ninety_days_violations_count {
test_utils.check_test_violations_count(fixture_assets, [fixture_constraints.ninety_days], template_name, 2)
test_utils.check_test_violations_count(fixture_assets, [fixture_constraints.ninety_days], template_name, 3)
}

test_service_account_key_age_one_hundred_days_violations_count {
test_utils.check_test_violations_count(fixture_assets, [fixture_constraints.one_hundred_days], template_name, 2)
test_utils.check_test_violations_count(fixture_assets, [fixture_constraints.one_hundred_days], template_name, 3)
}

# Confirm violation resources
test_service_account_key_age_ninety_days_resources {
resource_names := {"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover90days", "//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover100days"}
resource_names := {
"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover90days",
"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover100days",
"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover100000days",
}

test_utils.check_test_violations(fixture_assets, [fixture_constraints.ninety_days], template_name, resource_names)
}

test_service_account_key_age_one_hundred_days_resources {
resource_names := {"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover90days", "//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover100days"}
resource_names := {
"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover90days",
"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover100days",
"//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover100000days",
}

test_utils.check_test_violations(fixture_assets, [fixture_constraints.one_hundred_days], template_name, resource_names)
}
11 changes: 11 additions & 0 deletions validator/test/fixtures/gcp_iam_restrict_service_account_key_age/assets/data.json
View file
Expand Up @@ -21,6 +21,17 @@
}
}
},
{
"asset_type": "iam.googleapis.com/ServiceAccountKey",
"name": "//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyageover100000days",
"resource": {
"data": {
"validAfterTime": "2018-03-24T10:00:00Z",
"validBeforeTime": "2999-08-22T19:55:36Z",
"keyAlgorithm": "KEY_ALG_RSA_2048"
}
}
},
{
"asset_type": "iam.googleapis.com/ServiceAccountKey",
"name": "//iam.googleapis.com/projects/forseti-system-test/serviceAccounts/111111-compute@developer.gserviceaccount.com/keys/testkeyagefuture",
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