From b7e88a98415c86d3cd4f30f9d4022d1234baebca Mon Sep 17 00:00:00 2001
From: Ciffelia <mc.prince.0203@gmail.com>
Date: Mon, 8 Apr 2024 00:23:11 +0900
Subject: [PATCH 1/2] feat: add `zeroize` feature

---
 Cargo.lock | 21 +++++++++++++++++++++
 Cargo.toml |  1 +
 src/lib.rs | 19 +++++++++++++++++++
 3 files changed, 41 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index 11f1553..f179910 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -46,6 +46,7 @@ dependencies = [
  "serde",
  "serde_json",
  "thiserror",
+ "zeroize",
 ]
 
 [[package]]
@@ -197,3 +198,23 @@ name = "yansi"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09041cd90cf85f7f8b2df60c646f853b7f535ce68f85244eb6731cf89fa498ec"
+
+[[package]]
+name = "zeroize"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 84b538f..d4a6607 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ exclude = ["/.github", "/.gitignore"]
 thiserror = "1.0"
 serde = { version = "1.0", optional = true }
 rand = "0.8.5"
+zeroize = { version = "1.7", features = ["zeroize_derive"], optional = true }
 
 [dev-dependencies]
 serde_json = "1.0"
diff --git a/src/lib.rs b/src/lib.rs
index 12d1b24..fb4d44b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -163,6 +163,7 @@ use alphabet::{Alphabet, AlphabetExt, Base64UrlAlphabet};
 /// let id: Nanoid<9, Base62Alphabet> = "abc123XYZ".parse()?;
 /// # Ok::<(), Box<dyn std::error::Error>>(())
 /// ```
+#[cfg_attr(feature = "zeroize", derive(zeroize::Zeroize))]
 pub struct Nanoid<const N: usize = 21, A: Alphabet = Base64UrlAlphabet> {
     /// The Nano ID string. All characters are ASCII.
     inner: [u8; N],
@@ -762,6 +763,24 @@ mod tests {
         inner::<12, Base58Alphabet>("\"abcdefghijkl\"");
     }
 
+    #[cfg(feature = "zeroize")]
+    #[test]
+    fn test_zeroize() {
+        use zeroize::Zeroize;
+
+        fn inner<const N: usize, A: Alphabet>(s: &str) {
+            let mut id: Nanoid<N, A> = s.parse().unwrap();
+            id.zeroize();
+        }
+
+        inner::<21, Base64UrlAlphabet>("ABCDEFGHIJKLMNOPQ123_");
+        inner::<21, Base62Alphabet>("ABCDEFGHIJKLMNOPQ1234");
+        inner::<21, Base58Alphabet>("ABCDEFGHJKLMNPQ123456");
+        inner::<6, Base64UrlAlphabet>("abc12-");
+        inner::<10, Base62Alphabet>("abc1234XYZ");
+        inner::<12, Base58Alphabet>("abc123XYZ123");
+    }
+
     #[test]
     fn test_nanoid_macro() {
         {

From 04af205f77c67a1a137ab7c68578db649b260f89 Mon Sep 17 00:00:00 2001
From: ciffelia <15273128+ciffelia@users.noreply.github.com>
Date: Sun, 14 Apr 2024 15:16:50 +0900
Subject: [PATCH 2/2] docs: add docs for `zeroize` feature

---
 README.md  | 3 ++-
 src/lib.rs | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 879e07a..1ea5905 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,8 @@ let id: Nanoid<9, Base62Alphabet> = "abc123XYZ".parse()?;
 
 ## Features
 
-- `serde`: Enable serialization and deserialization of [`Nanoid`] using the [`serde`](https://docs.rs/serde) crate.
+- `serde`: Add support for serialization and deserialization of [`Nanoid`] using the [`serde`](https://docs.rs/serde) crate.
+- `zeroize`: Add support for zeroizing the memory of [`Nanoid`] using the [`zeroize`](https://docs.rs/zeroize) crate.
 
 ## Comparison with other implementations of Nano ID
 
diff --git a/src/lib.rs b/src/lib.rs
index fb4d44b..55b7064 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -78,7 +78,8 @@
 //!
 //! # Features
 //!
-//! - `serde`: Enable serialization and deserialization of [`Nanoid`] using the [`serde`](https://docs.rs/serde) crate.
+//! - `serde`: Add support for serialization and deserialization of [`Nanoid`] using the [`serde`](https://docs.rs/serde) crate.
+//! - `zeroize`: Add support for zeroizing the memory of [`Nanoid`] using the [`zeroize`](https://docs.rs/zeroize) crate.
 //!
 //! # Comparison with other implementations of Nano ID
 //!