Add base64 encoder to cel expression evaluation (#599)

Author: Damy3

pkg/cel/ast/inspector.go

@@ -103,6 +103,8 @@ type Inspector struct {
 // knownFunctions contains the list of all CEL functions that are supported
 var knownFunctions = []string{
 	"random.seededString",
+	"base64.decode",
+	"base64.encode",
 }
 
 // DefaultInspector creates a new Inspector instance with the given resources and functions.

pkg/cel/environment.go

@@ -54,6 +54,7 @@ func DefaultEnvironment(options ...EnvOption) (*cel.Env, error) {
 	declarations := []cel.EnvOption{
 		ext.Lists(),
 		ext.Strings(),
+		ext.Encoders(),
 		library.Random(),
 	}