refactor: 将 DTLS 本地依赖迁移到 libs 目录

libs/dtls/src/handshake/handshake_message_certificate_request.rs

@@ -0,0 +1,77 @@
+#[cfg(test)]
+mod handshake_message_certificate_request_test;
+
+use std::io::{Read, Write};
+
+use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
+
+use super::*;
+use crate::client_certificate_type::*;
+use crate::signature_hash_algorithm::*;
+
+/*
+A non-anonymous server can optionally request a certificate from
+the client, if appropriate for the selected cipher suite.  This
+message, if sent, will immediately follow the ServerKeyExchange
+message (if it is sent; otherwise, this message follows the
+server's Certificate message).
+*/
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct HandshakeMessageCertificateRequest {
+    pub(crate) certificate_types: Vec<ClientCertificateType>,
+    pub(crate) signature_hash_algorithms: Vec<SignatureHashAlgorithm>,
+}
+
+const HANDSHAKE_MESSAGE_CERTIFICATE_REQUEST_MIN_LENGTH: usize = 5;
+
+impl HandshakeMessageCertificateRequest {
+    pub fn handshake_type(&self) -> HandshakeType {
+        HandshakeType::CertificateRequest
+    }
+
+    pub fn size(&self) -> usize {
+        1 + self.certificate_types.len() + 2 + self.signature_hash_algorithms.len() * 2 + 2
+    }
+
+    pub fn marshal<W: Write>(&self, writer: &mut W) -> Result<()> {
+        writer.write_u8(self.certificate_types.len() as u8)?;
+        for v in &self.certificate_types {
+            writer.write_u8(*v as u8)?;
+        }
+
+        writer.write_u16::<BigEndian>(2 * self.signature_hash_algorithms.len() as u16)?;
+        for v in &self.signature_hash_algorithms {
+            writer.write_u8(v.hash as u8)?;
+            writer.write_u8(v.signature as u8)?;
+        }
+
+        writer.write_all(&[0x00, 0x00])?; // Distinguished Names Length
+
+        Ok(writer.flush()?)
+    }
+
+    pub fn unmarshal<R: Read>(reader: &mut R) -> Result<Self> {
+        let certificate_types_length = reader.read_u8()?;
+
+        let mut certificate_types = vec![];
+        for _ in 0..certificate_types_length {
+            let cert_type = reader.read_u8()?.into();
+            certificate_types.push(cert_type);
+        }
+
+        let signature_hash_algorithms_length = reader.read_u16::<BigEndian>()?;
+
+        let mut signature_hash_algorithms = vec![];
+        for _ in (0..signature_hash_algorithms_length).step_by(2) {
+            let hash = reader.read_u8()?.into();
+            let signature = reader.read_u8()?.into();
+
+            signature_hash_algorithms.push(SignatureHashAlgorithm { hash, signature });
+        }
+
+        Ok(HandshakeMessageCertificateRequest {
+            certificate_types,
+            signature_hash_algorithms,
+        })
+    }
+}