From 720cdee1de42c6ca201473ba0340a6ad2b2931df Mon Sep 17 00:00:00 2001
From: lifegpc <root@lifegpc.com>
Date: Thu, 9 Apr 2026 11:22:38 +0800
Subject: [PATCH] Add DameganeCrypt (untested)

---
 msg_tool_xp3data/crypt.json                   |  4 ++++
 src/scripts/kirikiri/archive/xp3/crypt/mod.rs | 21 +++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/msg_tool_xp3data/crypt.json b/msg_tool_xp3data/crypt.json
index 8392ec4..182e974 100644
--- a/msg_tool_xp3data/crypt.json
+++ b/msg_tool_xp3data/crypt.json
@@ -301,6 +301,10 @@
         "$type": "HashCrypt",
         "Title": "カスタム隷奴 4/4+/V"
     },
+    "Damegane": {
+        "$type": "DameganeCrypt",
+        "Title": "だめがね"
+    },
     "Daraku Koujo": {
         "$type": "FlyingShineCrypt",
         "Title": "堕落皇女～魔術師の罠に嵌った聖女～"
diff --git a/src/scripts/kirikiri/archive/xp3/crypt/mod.rs b/src/scripts/kirikiri/archive/xp3/crypt/mod.rs
index ae60b2b..741250a 100644
--- a/src/scripts/kirikiri/archive/xp3/crypt/mod.rs
+++ b/src/scripts/kirikiri/archive/xp3/crypt/mod.rs
@@ -161,6 +161,7 @@ enum CryptType {
     SeitenCrypt,
     OkibaCrypt,
     DieselmineCrypt,
+    DameganeCrypt,
 }
 
 #[derive(Clone, Debug, Deserialize)]
@@ -249,6 +250,7 @@ impl Schema {
             CryptType::SeitenCrypt => Box::new(SeitenCrypt::new(self.base.clone())),
             CryptType::OkibaCrypt => Box::new(OkibaCrypt::new(self.base.clone())),
             CryptType::DieselmineCrypt => Box::new(DieselmineCrypt::new(self.base.clone())),
+            CryptType::DameganeCrypt => Box::new(DameganeCrypt::new(self.base.clone())),
         })
     }
 }
@@ -836,6 +838,25 @@ impl<R: Read> Read for DieselmineCryptReader<R> {
     }
 }
 
+seek_crypt_filehash_key_u8_impl!(DameganeCrypt, DameganeCryptReader<T>);
+
+impl<R: Read> Read for DameganeCryptReader<R> {
+    fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
+        let readed = self.inner.read(buf)?;
+        for (i, t) in (&mut buf[..readed]).iter_mut().enumerate() {
+            let offset = self.seg_start + self.pos + i as u64;
+            let key = if offset & 1 != 0 {
+                self.key
+            } else {
+                offset as u8
+            };
+            *t ^= key;
+        }
+        self.pos += readed as u64;
+        Ok(readed)
+    }
+}
+
 #[test]
 fn test_deserialize_crypt() {
     for (key, schema) in CRYPT_SCHEMA.iter() {