feat: added base64 encoding helpers for js

README_CN.md

@@ -7,7 +7,7 @@
 
 
 <p align="center">
-<img src="https://img.shields.io/github/go-mod/go-version/projectdiscovery/nuclei?filename=v2%2Fgo.mod">
+<img src="https://img.shields.io/github/go-mod/go-version/projectdiscovery/nuclei">
 <a href="https://github.com/projectdiscovery/nuclei/releases"><img src="https://img.shields.io/github/downloads/projectdiscovery/nuclei/total">
 <a href="https://github.com/projectdiscovery/nuclei/graphs/contributors"><img src="https://img.shields.io/github/contributors-anon/projectdiscovery/nuclei">
 <a href="https://github.com/projectdiscovery/nuclei/releases/"><img src="https://img.shields.io/github/release/projectdiscovery/nuclei">

go.mod

@@ -133,7 +133,7 @@ require (
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dlclark/regexp2 v1.10.0 // indirect
 	github.com/docker/cli v24.0.5+incompatible // indirect
-	github.com/docker/docker v24.0.5+incompatible // indirect
+	github.com/docker/docker v24.0.7+incompatible // indirect
 	github.com/docker/go-connections v0.4.0 // indirect
 	github.com/fatih/color v1.15.0 // indirect
 	github.com/free5gc/util v1.0.5-0.20230511064842-2e120956883b // indirect

go.sum

@@ -269,8 +269,8 @@ github.com/dnaeon/go-vcr v1.2.0 h1:zHCHvJYTMh1N7xnV7zf1m1GPBF9Ad0Jk/whtQ1663qI=
 github.com/dnaeon/go-vcr v1.2.0/go.mod h1:R4UdLID7HZT3taECzJs4YgbbH6PIGXB6W/sc5OLb6RQ=
 github.com/docker/cli v24.0.5+incompatible h1:WeBimjvS0eKdH4Ygx+ihVq1Q++xg36M/rMi4aXAvodc=
 github.com/docker/cli v24.0.5+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
-github.com/docker/docker v24.0.5+incompatible h1:WmgcE4fxyI6EEXxBRxsHnZXrO1pQ3smi0k/jho4HLeY=
-github.com/docker/docker v24.0.5+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
+github.com/docker/docker v24.0.7+incompatible h1:Wo6l37AuwP3JaMnZa226lzVXGA3F9Ig1seQen0cKYlM=
+github.com/docker/docker v24.0.7+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/go-connections v0.4.0 h1:El9xVISelRB7BuFusrZozjnkIM5YnzCViNKohAFqRJQ=
 github.com/docker/go-connections v0.4.0/go.mod h1:Gbd7IOopHjR8Iph03tsViu4nIes5XhDvyHbTtUxmeec=
 github.com/docker/go-units v0.5.0 h1:69rxXcBk27SvSaaxTtLh/8llcHD8vYHT7WSdRZ/jvr4=

pkg/js/global/helpers.go

@@ -0,0 +1,40 @@
+package global
+
+import (
+	"encoding/base64"
+
+	"github.com/dop251/goja"
+	"github.com/projectdiscovery/nuclei/v3/pkg/js/gojs"
+)
+
+func registerAdditionalHelpers(runtime *goja.Runtime) {
+	_ = gojs.RegisterFuncWithSignature(runtime, gojs.FuncOpts{
+		Name: "atob",
+		Signatures: []string{
+			"atob(string) string",
+		},
+		Description: "Base64 decodes a given string",
+		FuncDecl: func(call goja.FunctionCall) goja.Value {
+			input := call.Argument(0).String()
+
+			decoded, err := base64.StdEncoding.DecodeString(input)
+			if err != nil {
+				return goja.Null()
+			}
+			return runtime.ToValue(string(decoded))
+		},
+	})
+
+	_ = gojs.RegisterFuncWithSignature(runtime, gojs.FuncOpts{
+		Name: "btoa",
+		Signatures: []string{
+			"bota(string) string",
+		},
+		Description: "Base64 encodes a given string",
+		FuncDecl: func(call goja.FunctionCall) goja.Value {
+			input := call.Argument(0).String()
+			encoded := base64.StdEncoding.EncodeToString([]byte(input))
+			return runtime.ToValue(encoded)
+		},
+	})
+}

pkg/js/global/scripts.go

@@ -172,6 +172,9 @@ func initBuiltInFunc(runtime *goja.Runtime) {
 			return runtime.ToValue(buff.String())
 		},
 	})
+
+	// register additional helpers
+	registerAdditionalHelpers(runtime)
 }
 
 // RegisterNativeScripts are js scripts that were added for convenience