Vendor dependencies

2026-08-01 16:11:49 +03:00
parent 7f139a0241
commit 6b5e7f0f8b
29706 changed files with 9575646 additions and 0 deletions
@@ -0,0 +1,32 @@
+//! Legacy version of ChaCha20 with a 64-bit nonce
+
+use crate::{ChaChaCore, Key, R20, variants::Legacy};
+use cipher::{
+    IvSizeUser, KeyIvInit, KeySizeUser, StreamCipherCoreWrapper,
+    array::Array,
+    consts::{U8, U32},
+};
+
+/// Nonce type used by [`ChaCha20Legacy`].
+pub type LegacyNonce = Array<u8, U8>;
+
+/// The ChaCha20 stream cipher (legacy "djb" construction with 64-bit nonce).
+pub type ChaCha20Legacy = StreamCipherCoreWrapper<ChaCha20LegacyCore>;
+
+/// The ChaCha20 stream cipher (legacy "djb" construction with 64-bit nonce).
+pub type ChaCha20LegacyCore = ChaChaCore<R20, Legacy>;
+
+impl KeySizeUser for ChaCha20LegacyCore {
+    type KeySize = U32;
+}
+
+impl IvSizeUser for ChaCha20LegacyCore {
+    type IvSize = U8;
+}
+
+impl KeyIvInit for ChaCha20LegacyCore {
+    #[inline(always)]
+    fn new(key: &Key, iv: &LegacyNonce) -> Self {
+        ChaChaCore::<R20, Legacy>::new_internal(key.as_ref(), iv.as_ref())
+    }
+}