Add NekoWorksCrypt (tested gamehttps://vndb.org/v32811)

msg_tool_xp3data/crypt.json

@@ -500,6 +500,21 @@
         "$type": "HashCrypt",
         "Title": "不可視な愛情～透明なボクに感じるママ～"
     },
+    "Futamata Ren'ai": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "Title": "フタマタ恋愛 | 恋爱成双 | 劈腿之恋"
+    },
+    "Futamata Ren'ai - Rui & Miyako Mini After Story": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "Title": "フタマタ恋愛 瑠衣＆宮子ミニアフターストーリー | 恋爱成双 瑠衣&宫子 mini小剧场"
+    },
+    "Futamata Ren'ai - Yua & Kirame Mini After Story": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "Title": "フタマタ恋愛 結愛＆煌ミニアフターストーリー | 恋爱成双 结爱&煌 mini小剧场"
+    },
     "Gakuen Butou no Folklore": {
         "$type": "NephriteCrypt",
         "Title": "学園舞闘のフォークロア"
@@ -1151,6 +1166,11 @@
         "$type": "SourireCrypt",
         "Title": "恋する彼女の不器用な舞台 | 恋爱中的她的笨拙舞台"
     },
+    "Koibana Ren'ai": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==",
+        "Title": "コイバナ恋愛 | 八卦恋爱"
+    },
     "Koikishi Purely ☆ Kiss": {
         "$type": "CxEncryption",
         "Mask": 561,
@@ -1831,6 +1851,21 @@
         "TpmFileName": "plugin/relations.tpm",
         "Title": "リレーションズ シスター×シスター | リレーションズ　シスター・シスター"
     },
+    "Ren'ai x Royale": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "Title": "恋愛×ロワイアル | 恋爱×决胜战 | 恋爱×争夺战"
+    },
+    "Ren'ai x Royale - Nonoka & Renna & Yuna Mini After Story": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "Title": "恋愛×ロワイアル 乃々香＆蓮菜＆由奈 ミニアフターストーリー | 恋爱×决胜战 乃乃香&莲菜&由奈小故事"
+    },
+    "Ren'ai, Karichaimashita": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "Title": "恋愛、借りちゃいました | 恋爱，我就借走了 | 想谈个恋爱吗？那就给钱吧 | 恋爱，我就借走咯"
+    },
     "RGH ~Koi to Hero to Gakuen to~": {
         "$type": "NephriteCrypt",
         "Title": "RGH～恋とヒーローと学園と～"
@@ -1998,6 +2033,11 @@
         "$type": "HashCrypt",
         "Title": "清楚なあの娘は、隠れビッチ ～いつでもどこでも欲情ＳＥＸ～"
     },
+    "Sekai-Ichi Yaritai Jugyou ~Rin-sensei no Loli Bitch na Hanten Sekai~": {
+        "$type": "NekoWorksCrypt",
+        "Key": "l4m0/ejjYWYBNve+9k1+TgAAAAAAAAAAAQAAABcAAAA=",
+        "Title": "世界一ヤリたい授業 ～林先生のロリビッチな反転世界～"
+    },
     "Sekisaba!": {
         "$type": "SmxCrypt",
         "Mask": 5,
@@ -2213,6 +2253,11 @@
         "TpmFileName": "plugin/sukitama.tpm",
         "Title": "好きで好きでたまらない"
     },
+    "Suki to Suki to de Sankaku Ren'ai": {
+        "$type": "NekoWorksCrypt",
+        "Key": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=",
+        "Title": "スキとスキとでサンカク恋愛 | 青春×好奇相伴的三角恋爱"
+    },
     "Sukui no Serenade": {
         "$type": "CxEncryption",
         "Mask": 401,

src/scripts/kirikiri/archive/xp3/crypt/mod.rs

@@ -246,6 +246,10 @@ enum CryptType {
     FestivalCrypt,
     PinPointCrypt,
     HybridCrypt,
+    #[serde(rename_all = "PascalCase")]
+    NekoWorksCrypt {
+        key: Base64Bytes,
+    },
 }
 
 #[derive(Clone, Debug, Deserialize)]
@@ -385,6 +389,9 @@ impl Schema {
             CryptType::FestivalCrypt => Box::new(FestivalCrypt::new(self.base.clone())),
             CryptType::PinPointCrypt => Box::new(PinPointCrypt::new(self.base.clone())),
             CryptType::HybridCrypt => Box::new(HybridCrypt::new(self.base.clone())),
+            CryptType::NekoWorksCrypt { key } => {
+                Box::new(NekoWorksCrypt::new(self.base.clone(), key.bytes.clone())?)
+            }
         })
     }
 }
@@ -1924,6 +1931,82 @@ impl<R: Read> Read for HybridCryptReader<R> {
     }
 }
 
+#[derive(Debug)]
+pub struct NekoWorksCrypt {
+    base: BaseSchema,
+    key: Vec<u8>,
+}
+
+impl NekoWorksCrypt {
+    pub fn new(base: BaseSchema, key: Vec<u8>) -> Result<Self> {
+        if key.len() < 31 {
+            anyhow::bail!("NekoWorksCrypt: key is too small.");
+        }
+        Ok(Self { base, key })
+    }
+
+    fn init_key(&self, mut hash: u32) -> [u8; 31] {
+        hash &= 0x7FFFFFFF;
+        hash = hash << 31 | hash;
+        let mut key = [0; 31];
+        key.copy_from_slice(&self.key[..31]);
+        for i in 0..31 {
+            key[i] ^= hash as u8;
+            hash = (hash & 0xFFFFFFFE) << 23 | hash >> 8;
+        }
+        key
+    }
+}
+
+impl Crypt for NekoWorksCrypt {
+    base_schema_impl!();
+    fn decrypt_supported(&self) -> bool {
+        true
+    }
+    fn decrypt_seek_supported(&self) -> bool {
+        true
+    }
+    fn decrypt<'a>(
+        &self,
+        entry: &Xp3Entry,
+        cur_seg: &Segment,
+        stream: Box<dyn Read + Send + Sync + 'a>,
+    ) -> Result<Box<dyn ReadDebug + Send + Sync + 'a>> {
+        Ok(Box::new(NekoWorksCryptReader::new(
+            stream,
+            cur_seg,
+            self.init_key(entry.file_hash),
+        )))
+    }
+    fn decrypt_with_seek<'a>(
+        &self,
+        entry: &Xp3Entry,
+        cur_seg: &Segment,
+        stream: Box<dyn ReadSeek + Send + Sync + 'a>,
+    ) -> Result<Box<dyn ReadSeek + Send + Sync + 'a>> {
+        Ok(Box::new(NekoWorksCryptReader::new(
+            stream,
+            cur_seg,
+            self.init_key(entry.file_hash),
+        )))
+    }
+}
+
+seek_reader_key_impl!(NekoWorksCryptReader<T>, [u8; 31]);
+
+impl<R: Read> Read for NekoWorksCryptReader<R> {
+    fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
+        let readed = self.inner.read(buf)?;
+        let mut offset = ((self.seg_start + self.pos) % 31) as usize;
+        for t in (&mut buf[..readed]).iter_mut() {
+            *t ^= self.key[offset];
+            offset = (offset + 1) % 31;
+        }
+        self.pos += readed as u64;
+        Ok(readed)
+    }
+}
+
 #[test]
 fn test_deserialize_crypt() {
     for (key, schema) in CRYPT_SCHEMA.iter() {