From a7f32e455273ed713535237727e78f7b6385b0c6 Mon Sep 17 00:00:00 2001
From: Wenyu Su <priceclaptrap@hotmail.com>
Date: Thu, 21 Dec 2023 03:45:47 +0800
Subject: [PATCH] feat(crypto_box): add consts like SecretBox (#151)

---
 crypto_box/src/lib.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/crypto_box/src/lib.rs b/crypto_box/src/lib.rs
index 0e749db..e639ce2 100644
--- a/crypto_box/src/lib.rs
+++ b/crypto_box/src/lib.rs
@@ -233,6 +233,17 @@ pub struct CryptoBox<C> {
     secretbox: SecretBox<C>,
 }
 
+impl<C> CryptoBox<C> {
+    /// Size of an XSalsa20Poly1305 key in bytes
+    pub const KEY_SIZE: usize = SecretBox::<C>::KEY_SIZE;
+
+    /// Size of an XSalsa20Poly1305 nonce in bytes
+    pub const NONCE_SIZE: usize = SecretBox::<C>::NONCE_SIZE;
+
+    /// Size of a Poly1305 tag in bytes
+    pub const TAG_SIZE: usize = SecretBox::<C>::TAG_SIZE;
+}
+
 // Handwritten instead of derived to avoid `C: Clone` bound
 impl<C> Clone for CryptoBox<C> {
     fn clone(&self) -> Self {