Added fuzzing tests for authentication (#4503)

Signed-off-by: Saranya-jena <saranya.jena@harness.io>

chaoscenter/authentication/pkg/utils/utils_fuzz_test.go

@@ -0,0 +1,36 @@
+package utils
+
+import (
+	"fmt"
+	"testing"
+)
+
+func FuzzSanitizeString(f *testing.F) {
+	f.Fuzz(func(t *testing.T, input string) {
+		err := ValidateStrictPassword(input)
+		if err != nil {
+			if isExpectedError(err) {
+				fmt.Printf("Expected validation failure for input '%s': %v\n", input, err)
+			} else {
+				fmt.Printf("Unexpected validation failure for input '%s': %v\n", input, err)
+			}
+		}
+	})
+}
+
+func isExpectedError(err error) bool {
+	expectedErrors := []string{
+		"password is less than 8 characters",
+		"password does not contain digits",
+		"password does not contain lowercase alphabets",
+		"password does not contain uppercase alphabets",
+		"password does not contain special characters",
+	}
+
+	for _, expected := range expectedErrors {
+		if err.Error() == expected {
+			return true
+		}
+	}
+	return false
+}