web: add method to get all policies for given bucket name. (#2756)

Refer #1858

cmd/web-handlers.go

@@ -582,6 +582,40 @@ func (web *webAPIHandlers) GetBucketPolicy(r *http.Request, args *GetBucketPolic
 	return nil
 }
 
+// GetAllBucketPolicyArgs - get all bucket policy args.
+type GetAllBucketPolicyArgs struct {
+	BucketName string `json:"bucketName"`
+}
+
+// GetAllBucketPolicyRep - get all bucket policy reply.
+type GetAllBucketPolicyRep struct {
+	UIVersion string                         `json:"uiVersion"`
+	Policies  map[string]policy.BucketPolicy `json:"policies"`
+}
+
+// GetAllBucketPolicy - get all bucket policy.
+func (web *webAPIHandlers) GetAllBucketPolicy(r *http.Request, args *GetAllBucketPolicyArgs, reply *GetAllBucketPolicyRep) error {
+	if !isJWTReqAuthenticated(r) {
+		return &json2.Error{Message: "Unauthorized request"}
+	}
+
+	objectAPI := web.ObjectAPI()
+	if objectAPI == nil {
+		return &json2.Error{Message: "Server not initialized"}
+	}
+	policyInfo, err := readBucketAccessPolicy(objectAPI, args.BucketName)
+	if err != nil {
+		return &json2.Error{Message: err.Error()}
+	}
+
+	policies := policy.GetPolicies(policyInfo.Statements, args.BucketName)
+
+	reply.UIVersion = miniobrowser.UIVersion
+	reply.Policies = policies
+
+	return nil
+}
+
 // SetBucketPolicyArgs - set bucket policy args.
 type SetBucketPolicyArgs struct {
 	BucketName string `json:"bucketName"`

cmd/web-handlers_test.go

@@ -22,6 +22,7 @@ import (
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
+	"reflect"
 	"strconv"
 	"strings"
 	"testing"
@@ -781,6 +782,72 @@ func testWebGetBucketPolicyHandler(obj ObjectLayer, instanceType string, t TestE
 	}
 }
 
+// Wrapper for calling GetAllBucketPolicy Handler
+func TestWebHandlerGetAllBucketPolicyHandler(t *testing.T) {
+	ExecObjectLayerTest(t, testWebGetAllBucketPolicyHandler)
+}
+
+// testWebGetAllBucketPolicyHandler - Test GetAllBucketPolicy web handler
+func testWebGetAllBucketPolicyHandler(obj ObjectLayer, instanceType string, t TestErrHandler) {
+	// Register the API end points with XL/FS object layer.
+	apiRouter := initTestWebRPCEndPoint(obj)
+	// initialize the server and obtain the credentials and root.
+	// credentials are necessary to sign the HTTP request.
+	rootPath, err := newTestConfig("us-east-1")
+	if err != nil {
+		t.Fatalf("Init Test config failed")
+	}
+	// remove the root folder after the test ends.
+	defer removeAll(rootPath)
+
+	credentials := serverConfig.GetCredential()
+
+	authorization, err := getWebRPCToken(apiRouter, credentials.AccessKeyID, credentials.SecretAccessKey)
+	if err != nil {
+		t.Fatal("Cannot authenticate")
+	}
+
+	rec := httptest.NewRecorder()
+
+	bucketName := getRandomBucketName()
+	if err := obj.MakeBucket(bucketName); err != nil {
+		t.Fatal("Unexpected error: ", err)
+	}
+
+	policyDoc := `{"Version":"2012-10-17","Statement":[{"Action":["s3:GetBucketLocation"],"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::` + bucketName + `"],"Sid":""},{"Action":["s3:ListBucket"],"Condition":{"StringEquals":{"s3:prefix":["hello"]}},"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::` + bucketName + `"],"Sid":""},{"Action":["s3:ListBucketMultipartUploads"],"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::` + bucketName + `"],"Sid":""},{"Action":["s3:AbortMultipartUpload","s3:DeleteObject","s3:GetObject","s3:ListMultipartUploadParts","s3:PutObject"],"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::` + bucketName + `/hello*"],"Sid":""}]}`
+	if err := writeBucketPolicy(bucketName, obj, bytes.NewReader([]byte(policyDoc)), int64(len(policyDoc))); err != nil {
+		t.Fatal("Unexpected error: ", err)
+	}
+
+	testCaseResult1 := make(map[string]policy.BucketPolicy)
+	testCaseResult1[bucketName+"/hello*"] = policy.BucketPolicyReadWrite
+	testCases := []struct {
+		bucketName     string
+		expectedResult map[string]policy.BucketPolicy
+	}{
+		{bucketName, testCaseResult1},
+	}
+
+	for i, testCase := range testCases {
+		args := &GetAllBucketPolicyArgs{BucketName: testCase.bucketName}
+		reply := &GetAllBucketPolicyRep{}
+		req, err := newTestWebRPCRequest("Web.GetAllBucketPolicy", authorization, args)
+		if err != nil {
+			t.Fatalf("Test %d: Failed to create HTTP request: <ERROR> %v", i+1, err)
+		}
+		apiRouter.ServeHTTP(rec, req)
+		if rec.Code != http.StatusOK {
+			t.Fatalf("Test %d: Expected the response status to be 200, but instead found `%d`", i+1, rec.Code)
+		}
+		if err = getTestWebRPCResponse(rec, &reply); err != nil {
+			t.Fatalf("Test %d: Should succeed but it didn't, %v", i+1, err)
+		}
+		if !reflect.DeepEqual(testCase.expectedResult, reply.Policies) {
+			t.Fatalf("Test %d: expected: %v, got: %v", i+1, testCase.expectedResult, reply.Policies)
+		}
+	}
+}
+
 // Wrapper for calling SetBucketPolicy Handler
 func TestWebHandlerSetBucketPolicyHandler(t *testing.T) {
 	ExecObjectLayerTest(t, testWebSetBucketPolicyHandler)

vendor/github.com/minio/minio-go/pkg/policy/bucket-policy.go

@@ -563,6 +563,33 @@ func GetPolicy(statements []Statement, bucketName string, prefix string) BucketP
 	return policy
 }
 
+// GetPolicies returns a map of policies rules of given bucket name, prefix in given statements.
+func GetPolicies(statements []Statement, bucketName string) map[string]BucketPolicy {
+	policyRules := map[string]BucketPolicy{}
+	objResources := set.NewStringSet()
+	// Search all resources related to objects policy
+	for _, s := range statements {
+		for r := range s.Resources {
+			if strings.HasPrefix(r, awsResourcePrefix+bucketName+"/") {
+				objResources.Add(r)
+			}
+		}
+	}
+	// Pretend that policy resource as an actual object and fetch its policy
+	for r := range objResources {
+		// Put trailing * if exists in asterisk
+		asterisk := ""
+		if strings.HasSuffix(r, "*") {
+			r = r[:len(r)-1]
+			asterisk = "*"
+		}
+		objectPath := r[len(awsResourcePrefix+bucketName)+1 : len(r)]
+		p := GetPolicy(statements, bucketName, objectPath)
+		policyRules[bucketName+"/"+objectPath+asterisk] = p
+	}
+	return policyRules
+}
+
 // Returns new statements containing policy of given bucket name and
 // prefix are appended.
 func SetPolicy(statements []Statement, policy BucketPolicy, bucketName string, prefix string) []Statement {

vendor/vendor.json

@@ -114,10 +114,10 @@
 			"revisionTime": "2016-02-29T08:42:30-08:00"
 		},
 		{
-			"checksumSHA1": "0OZaeJPgMlA2Txn+1yeAIwEpJvM=",
+			"checksumSHA1": "qTxOBp3GVxCC70ykb7Hxg6UgWwA=",
 			"path": "github.com/minio/minio-go/pkg/policy",
-			"revision": "a2e27c84cd20b86cd781b76639781d6366235d0c",
+			"revision": "40505f5d08c721dfe5a6450fbdef3bcd6567aa97",
-			"revisionTime": "2016-08-23T00:31:21Z"
+			"revisionTime": "2016-09-04T08:12:15Z"
 		},
 		{
 			"checksumSHA1": "A8QOw1aWwc+RtjGozY0XeS5varo=",