增加ChaCah20

vnt/Cargo.toml

@@ -23,6 +23,8 @@ aes-gcm = { version = "0.10.2", optional = true }
 ring = { version = "0.17.0", optional = true }
 cbc = { version = "0.1.2", optional = true }
 ecb = { version = "0.1.2", optional = true }
+chacha20poly1305 = { version = "0.10.1", optional = true }
+chacha20 = { version = "0.9.1", optional = true }
 aes = "0.8.3"
 stun-format = { version = "1.0.1", features = ["fmt", "rfc3489"] }
 rsa = { version = "0.9.2", features = [], optional = true }
@@ -39,16 +41,18 @@ tokio = { version = "1.37.0", features = ["full"], optional = true }
 
 lz4_flex = { version = "0.11", default-features = false, optional = true }
 zstd = { version = "0.13.1", optional = true }
+
 [target.'cfg(target_os = "windows")'.dependencies]
 libloading = "0.8.0"
 
 
 [build-dependencies]
 protobuf-codegen = "3.2.0"
 protoc-bin-vendored = "3.0.0"
+cfg_aliases = "0.2.1"
 
 [features]
-default = ["server_encrypt", "aes_gcm", "aes_cbc", "aes_ecb", "sm4_cbc", "ip_proxy", "port_mapping", "lz4_compress","zstd_compress"]
+default = ["server_encrypt", "aes_gcm", "aes_cbc", "aes_ecb", "sm4_cbc", "chacha20_poly1305", "ip_proxy", "port_mapping", "lz4_compress", "zstd_compress"]
 openssl = ["openssl-sys"]
 # 从源码编译
 openssl-vendored = ["openssl-sys/vendored"]
@@ -57,6 +61,7 @@ aes_cbc = ["cbc"]
 aes_ecb = ["ecb"]
 sm4_cbc = ["libsm"]
 aes_gcm = ["aes-gcm"]
+chacha20_poly1305 = ["chacha20poly1305", "chacha20"]
 server_encrypt = ["aes-gcm", "rsa", "spki"]
 ip_proxy = ["tokio"]
 port_mapping = ["tokio"]

vnt/src/protocol/body.rs

@@ -253,6 +253,85 @@ impl<B: AsRef<[u8]> + AsMut<[u8]>> AesCbcSecretBody<B> {
         &mut self.buffer.as_mut()[..end]
     }
 }
+/* ChaCah20加密数据体
+  0                                            15                                              31
+  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5  6  7  8  9  0  1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ |                                          数据体                                              |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ |                                         finger(32)                                          |
+ |                                         finger(32)                                          |
+ |                                         finger(32)                                          |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+ 注：finger用于快速校验数据是否被修改，上层可使用token、协议头参与计算finger，
+    确保服务端和客户端都能感知修改(服务端不能解密也能校验指纹)
+*/
+pub struct ChaCah20SecretBody<B> {
+    buffer: B,
+    exist_finger: bool,
+}
+
+impl<B: AsRef<[u8]>> ChaCah20SecretBody<B> {
+    pub fn new(buffer: B, exist_finger: bool) -> io::Result<ChaCah20SecretBody<B>> {
+        let len = buffer.as_ref().len();
+        let min_len = if exist_finger { 12 } else { 0 };
+        // 不能大于udp最大载荷长度
+        if len < min_len || len > 65535 - 20 - 8 - 12 {
+            return Err(io::Error::new(
+                io::ErrorKind::InvalidData,
+                "ChaCah20SecretBody length overflow",
+            ));
+        }
+        Ok(ChaCah20SecretBody {
+            buffer,
+            exist_finger,
+        })
+    }
+    pub fn en_body(&self) -> &[u8] {
+        let mut end = self.buffer.as_ref().len();
+        if self.exist_finger {
+            end -= 12;
+        }
+        &self.buffer.as_ref()[..end]
+    }
+    pub fn finger(&self) -> &[u8] {
+        if self.exist_finger {
+            let end = self.buffer.as_ref().len();
+            &self.buffer.as_ref()[end - 12..end]
+        } else {
+            &[]
+        }
+    }
+}
+
+impl<B: AsRef<[u8]> + AsMut<[u8]>> ChaCah20SecretBody<B> {
+    pub fn set_finger(&mut self, finger: &[u8]) -> io::Result<()> {
+        if self.exist_finger {
+            if finger.len() != 12 {
+                return Err(io::Error::new(
+                    io::ErrorKind::InvalidData,
+                    "finger.len != 12",
+                ));
+            }
+            let end = self.buffer.as_ref().len();
+            self.buffer.as_mut()[end - 12..end].copy_from_slice(finger);
+            Ok(())
+        } else {
+            Err(io::Error::new(
+                io::ErrorKind::InvalidData,
+                "cbc not exist finger",
+            ))
+        }
+    }
+    pub fn en_body_mut(&mut self) -> &mut [u8] {
+        let mut end = self.buffer.as_ref().len();
+        if self.exist_finger {
+            end -= 12;
+        }
+        &mut self.buffer.as_mut()[..end]
+    }
+}
 
 /* rsa加密数据体
   0                                            15                                              31