all: return 403 Forbidden when requesting awwan.key and awwan.pass

When user run "awwan serve", using web-user interface, any request to
fetch the content of "awwan.key" and "awwan.pass" should not allowed for
security reason, in case user want to serve awwan with others.

6 files changed, 118 insertions, 5 deletions

diff --git a/http_server.go b/http_server.go
index 0996432..a96f28d 100644
--- a/http_server.go
+++ b/http_server.go
@@ -99,7 +99,7 @@ func (httpd *httpServer) registerEndpoints() (err error) {
 		Path:         pathAwwanApiFs,
 		RequestType:  libhttp.RequestTypeQuery,
 		ResponseType: libhttp.ResponseTypeJSON,
-		Call:         httpd.awwanApiFsGet,
+		Call:         httpd.FSGet,
 	})
 	if err != nil {
 		return fmt.Errorf("%s: %w", logp, err)
@@ -343,9 +343,19 @@ func (httpd *httpServer) Encrypt(epr *libhttp.EndpointRequest) (resb []byte, err
 	return resb, nil
 }
 
-// awwanApiFsGet get the list of files or specific file using query
-// parameter "path".
-func (httpd *httpServer) awwanApiFsGet(epr *libhttp.EndpointRequest) (resb []byte, err error) {
+// FSGet get the list of files in directory or content of file by
+// its path.
+//
+// Request format,
+//
+//	GET /awwan/api/fs?path=<string>
+//
+// Response format,
+//
+//	Content-Type: application/json
+//
+//	{"code":200,"data":<memfs.Node>}
+func (httpd *httpServer) FSGet(epr *libhttp.EndpointRequest) (resb []byte, err error) {
 	var (
 		res = &libhttp.EndpointResponse{}
 
@@ -359,9 +369,19 @@ func (httpd *httpServer) awwanApiFsGet(epr *libhttp.EndpointRequest) (resb []byt
 		res.Data = httpd.memfsBase
 		return json.Marshal(res)
 	}
+	if path == `/.ssh/awwan.key` || path == `/.ssh/awwan.pass` {
+		res.Code = http.StatusForbidden
+		res.Message = `Forbidden`
+		return nil, res
+	}
 
 	node, err = httpd.memfsBase.Get(path)
 	if err != nil {
+		if errors.Is(err, fs.ErrNotExist) {
+			res.Code = http.StatusNotFound
+			res.Message = fmt.Sprintf(`%q not found`, path)
+			return nil, res
+		}
 		return nil, err
 	}
 
diff --git a/http_server_test.go b/http_server_test.go
index 159c166..81a8b61 100644
--- a/http_server_test.go
+++ b/http_server_test.go
@@ -190,3 +190,75 @@ func TestHttpServer_Encrypt(t *testing.T) {
 		test.Assert(t, c.desc, c.expResp, gotResp.String())
 	}
 }
+
+func TestHttpServer_FSGet(t *testing.T) {
+	var (
+		tdata *test.Data
+		err   error
+	)
+
+	tdata, err = test.LoadData(`testdata/http_server/fsget_test.data`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var aww *Awwan
+
+	aww, err = New(`testdata/http_server/fsget`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var httpd *httpServer
+
+	httpd, err = newHttpServer(aww, ``)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	type testCase struct {
+		desc string
+		path string
+		exp  string
+	}
+	var cases = []testCase{{
+		desc: `getSshAwwanKey`,
+		path: `/.ssh/awwan.key`,
+		exp:  string(tdata.Output[`getSshAwwanKey`]),
+	}, {
+		desc: `getSshAwwanPass`,
+		path: `/.ssh/awwan.pass`,
+		exp:  string(tdata.Output[`getSshAwwanPass`]),
+	}, {
+		desc: `getSshAwwanKeyIndirectly`,
+		path: `/myhost/../.ssh/awwan.key`,
+		exp:  string(tdata.Output[`getSshAwwanKeyIndirectly`]),
+	}}
+
+	var (
+		c          testCase
+		httpReq    *http.Request
+		httpRes    *http.Response
+		httpWriter *httptest.ResponseRecorder
+		body       []byte
+		jsonBody   bytes.Buffer
+	)
+
+	for _, c = range cases {
+		t.Log(c.desc)
+
+		httpReq = httptest.NewRequest(http.MethodGet, pathAwwanApiFs+`?path=`+c.path, nil)
+
+		httpWriter = httptest.NewRecorder()
+
+		httpd.ServeHTTP(httpWriter, httpReq)
+
+		httpRes = httpWriter.Result()
+
+		body, _ = io.ReadAll(httpRes.Body)
+
+		jsonBody.Reset()
+		json.Indent(&jsonBody, body, ``, `  `)
+		test.Assert(t, c.desc, c.exp, jsonBody.String())
+	}
+}
diff --git a/internal/memfs_wui.go b/internal/memfs_wui.go
index f2aec88..4359a7b 100644
--- a/internal/memfs_wui.go
+++ b/internal/memfs_wui.go
@@ -223,7 +223,7 @@ func generate__wui_main_js() *memfs.Node {
 		Content:     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 	}
 	node.SetMode(420)
-	node.SetModTimeUnix(1700243971, 205503454)
+	node.SetModTimeUnix(1700243999, 138980885)
 	node.SetName("main.js")
 	node.SetSize(31629)
 	return node
diff --git a/testdata/http_server/fsget/.ssh b/testdata/http_server/fsget/.ssh
new file mode 120000
index 0000000..3a90f72
--- /dev/null
+++ b/testdata/http_server/fsget/.ssh
@@ -0,0 +1 @@
+../../encrypt-with-passfile/.ssh
\ No newline at end of file
diff --git a/testdata/http_server/fsget/myhost/plain.txt b/testdata/http_server/fsget/myhost/plain.txt
new file mode 100644
index 0000000..4d50a3a
--- /dev/null
+++ b/testdata/http_server/fsget/myhost/plain.txt
@@ -0,0 +1 @@
+content of plain text
diff --git a/testdata/http_server/fsget_test.data b/testdata/http_server/fsget_test.data
new file mode 100644
index 0000000..34b322f
--- /dev/null
+++ b/testdata/http_server/fsget_test.data
@@ -0,0 +1,19 @@
+Test on FSGet method.
+
+<<< getSshAwwanKey
+{
+  "message": "Forbidden",
+  "code": 403
+}
+
+<<< getSshAwwanPass
+{
+  "message": "Forbidden",
+  "code": 403
+}
+
+<<< getSshAwwanKeyIndirectly
+{
+  "message": "\"/myhost/../.ssh/awwan.key\" not found",
+  "code": 404
+}