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Feature/32 extend bucket policy #33

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1 change: 1 addition & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ This document outlines major changes between releases.
- Billing metrics (TrueCloudLab#5)
- Multiple configs support (TrueCloudLab#21)
- Bucket name resolving policy (TrueCloudLab#25)
- Support string `Action` and `Resource` fields in `bucketPolicy.Statement` (TrueCloudLab#32)

### Changed
- Update neo-go to v0.101.0 (#14)
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84 changes: 84 additions & 0 deletions api/handler/acl.go
Original file line number Diff line number Diff line change
Expand Up @@ -158,6 +158,90 @@ func (s ServiceRecord) ToEACLRecord() *eacl.Record {
return serviceRecord
}

var (
errInvalidStatement = stderrors.New("invalid statement")
errInvalidPrincipal = stderrors.New("invalid principal")
)

func (s *statement) UnmarshalJSON(data []byte) error {
var statementMap map[string]interface{}
if err := json.Unmarshal(data, &statementMap); err != nil {
return err
}

sidField, ok := statementMap["Sid"]
if ok {
if s.Sid, ok = sidField.(string); !ok {
return errInvalidStatement
}
}

effectField, ok := statementMap["Effect"]
if ok {
if s.Effect, ok = effectField.(string); !ok {
return errInvalidStatement
}
}

principalField, ok := statementMap["Principal"]
if ok {
principalMap, ok := principalField.(map[string]interface{})
if !ok {
return errInvalidPrincipal
}

awsField, ok := principalMap["AWS"]
if ok {
if s.Principal.AWS, ok = awsField.(string); !ok {
return fmt.Errorf("%w: 'AWS' field must be string", errInvalidPrincipal)
}
}

canonicalUserField, ok := principalMap["CanonicalUser"]
if ok {
if s.Principal.CanonicalUser, ok = canonicalUserField.(string); !ok {
return errInvalidPrincipal
}
}
}

actionField, ok := statementMap["Action"]
if ok {
switch actionField := actionField.(type) {
case []interface{}:
s.Action = make([]string, len(actionField))
for i, action := range actionField {
if s.Action[i], ok = action.(string); !ok {
return errInvalidStatement
}
}
case string:
s.Action = []string{actionField}
default:
return errInvalidStatement
}
}

resourceField, ok := statementMap["Resource"]
if ok {
switch resourceField := resourceField.(type) {
case []interface{}:
s.Resource = make([]string, len(resourceField))
for i, action := range resourceField {
if s.Resource[i], ok = action.(string); !ok {
return errInvalidStatement
}
}
case string:
s.Resource = []string{resourceField}
default:
return errInvalidStatement
}
}

return nil
}

func (h *handler) GetBucketACLHandler(w http.ResponseWriter, r *http.Request) {
reqInfo := api.GetReqInfo(r.Context())

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79 changes: 79 additions & 0 deletions api/handler/acl_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -1352,6 +1352,85 @@ func TestBucketPolicy(t *testing.T) {
}
}

func TestBucketPolicyUnmarshal(t *testing.T) {
for _, tc := range []struct {
name string
policy string
}{
{
name: "action/resource array",
policy: `
{
"Version": "2012-10-17",
"Statement": [{
"Principal": {
"AWS": "arn:aws:iam::111122223333:role/JohnDoe"
},
"Effect": "Allow",
"Action": [
"s3:GetObject",
"s3:GetObjectVersion"
],
"Resource": [
"arn:aws:s3:::DOC-EXAMPLE-BUCKET/*",
"arn:aws:s3:::DOC-EXAMPLE-BUCKET2/*"
]
}]
}
`,
},
{
name: "action/resource string",
policy: `
{
"Version": "2012-10-17",
"Statement": [{
"Principal": {
"AWS": "arn:aws:iam::111122223333:role/JohnDoe"
},
"Effect": "Deny",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::DOC-EXAMPLE-BUCKET/*"
}]
}
`,
},
} {
t.Run(tc.name, func(t *testing.T) {
bktPolicy := &bucketPolicy{}
err := json.Unmarshal([]byte(tc.policy), bktPolicy)
require.NoError(t, err)
})
}
}

func TestPutBucketPolicy(t *testing.T) {
bktPolicy := `
{
"Version": "2012-10-17",
"Statement": [{
"Principal": {
"AWS": "*"
},
"Effect": "Deny",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::bucket-for-policy/*"
}]
}
`
hc := prepareHandlerContext(t)
bktName := "bucket-for-policy"

box, _ := createAccessBox(t)
createBucket(t, hc, bktName, box)

w, r := prepareTestPayloadRequest(hc, bktName, "", bytes.NewReader([]byte(bktPolicy)))
ctx := context.WithValue(r.Context(), api.BoxData, box)
r = r.WithContext(ctx)
hc.Handler().PutBucketPolicyHandler(w, r)
assertStatus(hc.t, w, http.StatusOK)
}

func getBucketPolicy(hc *handlerContext, bktName string) *bucketPolicy {
w, r := prepareTestRequest(hc, bktName, "", nil)
hc.Handler().GetBucketPolicyHandler(w, r)
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