From 0a9e0ff0a7655a1aae2820d2ca0b16cdbf74d446 Mon Sep 17 00:00:00 2001
From: lifegpc <root@lifegpc.com>
Date: Mon, 4 May 2026 10:15:42 +0800
Subject: [PATCH] Add HachukanoCrypt (untested)

---
 msg_tool_xp3data/crypt.json                   |  5 +++
 .../archive/xp3/crypt/chain_reaction.rs       | 36 +++++++++++++++++++
 src/scripts/kirikiri/archive/xp3/crypt/mod.rs |  4 +++
 3 files changed, 45 insertions(+)

diff --git a/msg_tool_xp3data/crypt.json b/msg_tool_xp3data/crypt.json
index 663219d..1da9b3d 100644
--- a/msg_tool_xp3data/crypt.json
+++ b/msg_tool_xp3data/crypt.json
@@ -624,6 +624,11 @@
         "ControlBlockName": "grisaia_vol5.bin",
         "Title": "グリザイア ファントムトリガー Vol. 5 | 灰色幻影扳机第5卷 | 灰色：幻影扳机 Vol. 5"
     },
+    "Hachukano": {
+        "$type": "HachukanoCrypt",
+        "StartupTjsNotEncrypted": true,
+        "Title": "はちゅかの"
+    },
     "Hahadori ~Ochiteiku Haha no Eizou Kiroku~": {
         "$type": "HashCrypt",
         "Title": "母撮 ～堕ちていく母の映像記録～"
diff --git a/src/scripts/kirikiri/archive/xp3/crypt/chain_reaction.rs b/src/scripts/kirikiri/archive/xp3/crypt/chain_reaction.rs
index 9aec3ce..73e687d 100644
--- a/src/scripts/kirikiri/archive/xp3/crypt/chain_reaction.rs
+++ b/src/scripts/kirikiri/archive/xp3/crypt/chain_reaction.rs
@@ -217,6 +217,10 @@ impl ChainReactionCrypt {
             inner: Box::new(ChainReactionCryptBase::new("plugin/list.bin".into())),
         }
     }
+
+    fn new_inner(base: BaseSchema, inner: Box<dyn IChainReactionCrypt + Send + Sync>) -> Self {
+        Self { base, inner }
+    }
 }
 
 impl AsRef<BaseSchema> for ChainReactionCrypt {
@@ -279,3 +283,35 @@ impl<R: Read> Read for ChainReactionCryptReader<R> {
         Ok(readed)
     }
 }
+
+#[derive(Debug)]
+pub struct HachukanoCrypt {
+    base: ChainReactionCryptBase,
+}
+
+impl HachukanoCrypt {
+    pub fn new(base: BaseSchema) -> ChainReactionCrypt {
+        ChainReactionCrypt::new_inner(
+            base,
+            Box::new(Self {
+                base: ChainReactionCryptBase::new("plugins/list.txt".into()),
+            }),
+        )
+    }
+}
+
+impl IChainReactionCrypt for HachukanoCrypt {
+    fn get_encryption_limit(&self, entry: &Xp3Entry) -> u32 {
+        let limit = self.base.get_encryption_limit(entry);
+        match limit {
+            0 => 0,
+            1 => 0x100,
+            2 => 0x200,
+            3 => entry.original_size as u32,
+            _ => limit,
+        }
+    }
+    fn init(&self, archive: &mut Xp3Archive) -> Result<()> {
+        self.base.init(archive)
+    }
+}
diff --git a/src/scripts/kirikiri/archive/xp3/crypt/mod.rs b/src/scripts/kirikiri/archive/xp3/crypt/mod.rs
index 4e5dfe6..1ebd8d7 100644
--- a/src/scripts/kirikiri/archive/xp3/crypt/mod.rs
+++ b/src/scripts/kirikiri/archive/xp3/crypt/mod.rs
@@ -267,6 +267,7 @@ enum CryptType {
         layer_name_suffix: String,
     },
     ChainReactionCrypt,
+    HachukanoCrypt,
 }
 
 #[derive(Clone, Debug, Deserialize)]
@@ -432,6 +433,9 @@ impl Schema {
             CryptType::ChainReactionCrypt => {
                 Box::new(chain_reaction::ChainReactionCrypt::new(self.base.clone()))
             }
+            CryptType::HachukanoCrypt => {
+                Box::new(chain_reaction::HachukanoCrypt::new(self.base.clone()))
+            }
         })
     }
 }