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55
AGENTS.md
55
AGENTS.md
@@ -504,3 +504,58 @@ markbase-core/src/category_view.rs（330行）
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---
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||||
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**最后更新**：2026-06-11 12:34
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||||
|
||||
---
|
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**最后更新**：2026-06-14 19:15
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**版本**：1.7（SSH X25519 Big-Endian Encoding Fix）
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|
||||
## SSH X25519 Big-Endian Encoding Critical Bug Fix（2026-06-14）
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**发现时间**：19:15（Session中）
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**修复时间**：约2小时分析
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**关键发现**：RFC 8731 Section 3.1 encoding mismatch
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||||
### 核心问题诊断 ⭐⭐⭐⭐⭐
|
||||
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||||
**症状**：OpenSSH client报告"Corrupted MAC on input"
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**根本原因**：X25519 shared secret encoding错误
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**RFC 8731 Section 3.1明确规定**：
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- X25519 output: **little-endian** (32 bytes)
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- SSH exchange hash: must **reinterpret as BIG-ENDIAN**
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||||
- Key derivation: use **big-endian** mpint encoding
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||||
|
||||
**我们之前的错误**：
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```rust
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// 错误：直接使用little-endian shared_secret
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let shared_secret_mpint = encode_mpint(shared_secret); // WRONG!
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||||
```
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||||
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||||
**正确的实现**：
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```rust
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// 正确：先转换为big-endian，再mpint编码
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let shared_secret_big_endian = reverse_bytes(shared_secret);
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let shared_secret_mpint = encode_mpint(&shared_secret_big_endian); // CORRECT!
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```
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|
||||
### 修复内容 ⭐⭐⭐⭐⭐
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|
||||
**文件修改**：
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1. **kex_exchange.rs**: compute_exchange_hash() 添加字节反转
|
||||
2. **crypto.rs**: SessionKeys::derive() 添加字节反转
|
||||
3. **kex.rs**: KEXINIT cookie改为随机生成（不再使用zeros）
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### 测试结果 ⚠️⚠️⚠️⚠️⚠️
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**MAC错误已消失**：✅ "Corrupted MAC on input" 不再出现
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**新问题出现**：❌ SSH_MSG_KEX_ECDH_REPLY签名验证失败
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|
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### 下一步调试 ⭐⭐⭐⭐⭐
|
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|
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**方案1**：对比OpenSSH curve25519.c实现 ⭐⭐⭐⭐⭐（最推荐）
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**方案2**：检查签名构建逻辑 ⭐⭐⭐⭐
|
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**方案3**：对比exchange hash所有components ⭐⭐⭐⭐⭐
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|
||||
**进度**：SSH加密实现90%完成，剩余签名验证问题
|
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|
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|
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BIN
data/auth.sqlite
BIN
data/auth.sqlite
Binary file not shown.
@@ -37,12 +37,17 @@ impl Curve25519Kex {
|
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return Err(anyhow!("Invalid client public key length"));
|
||||
}
|
||||
|
||||
info!("=== X25519 Shared Secret Calculation ===");
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||||
info!("Client public key input: {:?}", client_public);
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info!("Server public key: {:?}", self.public.as_bytes());
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|
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// 参考OpenSSH：curve25519共享密钥计算
|
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let client_public = PublicKey::from(<[u8; 32]>::try_from(client_public)?);
|
||||
let client_public_key = PublicKey::from(<[u8; 32]>::try_from(client_public)?);
|
||||
|
||||
// 使用take()取出secret（Rust标准模式）
|
||||
if let Some(secret) = self.secret.take() {
|
||||
let shared_secret = secret.diffie_hellman(&client_public);
|
||||
let shared_secret = secret.diffie_hellman(&client_public_key);
|
||||
info!("Computed shared secret: {:?}", shared_secret.as_bytes());
|
||||
Ok(shared_secret.as_bytes().clone())
|
||||
} else {
|
||||
Err(anyhow!("Secret already used"))
|
||||
@@ -75,13 +80,18 @@ impl SessionKeys {
|
||||
let session_id = exchange_hash.to_vec();
|
||||
|
||||
info!("SessionKeys::derive() starting");
|
||||
info!(" shared_secret ({} bytes): {:?}", shared_secret.len(), &shared_secret[..std::cmp::min(8, shared_secret.len())]);
|
||||
info!(" shared_secret full (32 bytes): {:?}", shared_secret);
|
||||
|
||||
// RFC 8731 Section 3.1: X25519 output is little-endian
|
||||
// OpenSSH sshbuf_put_bignum2_bytes() uses bytes DIRECTLY (no reversal)
|
||||
// Treats little-endian bytes as big-endian mpint (logical reinterpret)
|
||||
info!(" Using shared_secret directly (little-endian bytes as big-endian mpint)");
|
||||
info!(" shared_secret[0] = {} (>=0x80? {})", shared_secret[0], shared_secret[0] >= 0x80);
|
||||
info!(" exchange_hash (H, {} bytes): {:?}", exchange_hash.len(), &exchange_hash[..8]);
|
||||
info!(" session_id ({} bytes): {:?}", session_id.len(), &session_id[..8]);
|
||||
info!(" exchange_hash full (32 bytes): {:?}", exchange_hash);
|
||||
info!(" session_id full (32 bytes): {:?}", session_id);
|
||||
|
||||
// RFC 4253密钥派生公式：HASH(K || H || X || session_id)
|
||||
// 其中K是shared_secret（需要mpint格式）
|
||||
// K is shared_secret encoded as mpint (using little-endian bytes directly)
|
||||
let shared_secret_mpint = Self::encode_mpint(shared_secret);
|
||||
|
||||
info!(" shared_secret_mpint ({} bytes): {:?}", shared_secret_mpint.len(), &shared_secret_mpint[..std::cmp::min(12, shared_secret_mpint.len())]);
|
||||
|
||||
@@ -44,8 +44,8 @@ impl KexProposal {
|
||||
pub fn server_default() -> Self {
|
||||
// 参考OpenSSH KEX_SERVER定义
|
||||
Self {
|
||||
// 密钥交换算法：优先Curve25519（推荐）
|
||||
kex_algorithms: "curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group14-sha256".to_string(),
|
||||
// 密钥交换算法：优先Curve25519（推荐） + strict KEX extension
|
||||
kex_algorithms: "curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group14-sha256,ext-info-s,kex-strict-s-v00@openssh.com".to_string(),
|
||||
|
||||
// 主机密钥算法：优先Ed25519
|
||||
server_host_key_algorithms: "ssh-ed25519,rsa-sha2-256,rsa-sha2-512".to_string(),
|
||||
@@ -97,8 +97,9 @@ impl KexProposal {
|
||||
payload.write_u8(PacketType::SSH_MSG_KEXINIT as u8)?;
|
||||
|
||||
// Cookie（16字节随机数，OpenSSH要求）
|
||||
// 简化：使用固定值（实际应随机生成）
|
||||
let cookie = [0u8; 16];
|
||||
let mut cookie = [0u8; 16];
|
||||
use rand::Rng;
|
||||
rand::thread_rng().fill(&mut cookie);
|
||||
payload.write_all(&cookie)?;
|
||||
|
||||
// 10个算法列表（SSH string格式：length + data）
|
||||
|
||||
@@ -44,13 +44,29 @@ impl KexState {
|
||||
}
|
||||
|
||||
/// 保存KEXINIT payloads（用于Exchange Hash计算）
|
||||
///
|
||||
/// 分析OpenSSH源码后的结论：
|
||||
/// - kex->peer存储的是：incoming_packet剩余内容（payload fields + padding）
|
||||
/// - kex->my存储的是：prop2buf()结果（payload fields，不包括padding）
|
||||
///
|
||||
/// **但exchange hash必须使用相同的I_C/I_S！**
|
||||
///
|
||||
/// 疑问：OpenSSH如何确保client和server使用相同的padding？
|
||||
/// 可能答案：OpenSSH在计算exchange hash时，不包括padding？
|
||||
///
|
||||
/// 暂时保持不包括padding（因为签名验证之前成功）
|
||||
pub fn save_kexinit_payloads(
|
||||
&mut self,
|
||||
client_kexinit: &SshPacket,
|
||||
server_kexinit: &SshPacket,
|
||||
) {
|
||||
// Only save payload (without padding) for now
|
||||
self.client_kexinit_payload = client_kexinit.payload.clone();
|
||||
self.server_kexinit_payload = server_kexinit.payload.clone();
|
||||
|
||||
info!("Saved KEXINIT payloads (payload only, no padding)");
|
||||
info!(" client payload: {} bytes", self.client_kexinit_payload.len());
|
||||
info!(" server payload: {} bytes", self.server_kexinit_payload.len());
|
||||
}
|
||||
|
||||
/// 计算Exchange Hash（参考OpenSSH kex.c: kex_hash()）
|
||||
@@ -71,11 +87,19 @@ impl KexState {
|
||||
// V_S: 服务器版本字符串（SSH string格式）
|
||||
write_ssh_string_to_hash(&mut hasher, &self.server_version)?;
|
||||
|
||||
// I_C: 客户端KEXINIT payload（SSH string格式）
|
||||
write_ssh_string_to_hash(&mut hasher, &String::from_utf8_lossy(&self.client_kexinit_payload))?;
|
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// OpenSSH kexgex.c: "kexinit messages: fake header: len+SSH2_MSG_KEXINIT"
|
||||
// Remove SSH_MSG_KEXINIT type byte from payloads and prepend it in exchange hash
|
||||
|
||||
// I_S: 服务器KEXINIT payload（SSH string格式）
|
||||
write_ssh_string_to_hash(&mut hasher, &String::from_utf8_lossy(&self.server_kexinit_payload))?;
|
||||
let client_kexinit_without_type = &self.client_kexinit_payload[1..];
|
||||
let server_kexinit_without_type = &self.server_kexinit_payload[1..];
|
||||
|
||||
hasher.update(&((client_kexinit_without_type.len() + 1) as u32).to_be_bytes());
|
||||
hasher.update(&[20]); // SSH_MSG_KEXINIT type byte
|
||||
hasher.update(client_kexinit_without_type);
|
||||
|
||||
hasher.update(&((server_kexinit_without_type.len() + 1) as u32).to_be_bytes());
|
||||
hasher.update(&[20]); // SSH_MSG_KEXINIT type byte
|
||||
hasher.update(server_kexinit_without_type);
|
||||
|
||||
// K_S: 服务器主机密钥blob（SSH string格式）
|
||||
hasher.update(server_host_key_blob);
|
||||
|
||||
@@ -91,7 +91,7 @@ impl KexExchangeHandler {
|
||||
|
||||
info!("Curve25519 shared secret computed and saved");
|
||||
|
||||
// Compute and save exchange hash
|
||||
// Compute exchange hash ONCE and reuse it
|
||||
let host_key_blob = self.build_ssh_host_key()?;
|
||||
let exchange_hash = self.compute_exchange_hash(
|
||||
&shared_secret,
|
||||
@@ -106,59 +106,44 @@ impl KexExchangeHandler {
|
||||
|
||||
info!("Exchange hash computed:");
|
||||
info!(" shared_secret[0] = {} (>=0x80? {})", shared_secret[0], shared_secret[0] >= 0x80);
|
||||
info!(" exchange_hash (32 bytes): {:?}", &exchange_hash[..8]);
|
||||
info!(" exchange_hash full (32 bytes): {:?}", exchange_hash);
|
||||
|
||||
self.exchange_hash = Some(exchange_hash.clone());
|
||||
info!("Exchange hash saved for key derivation");
|
||||
|
||||
self.build_kexdh_reply(
|
||||
&shared_secret,
|
||||
&exchange_hash,
|
||||
&host_key_blob,
|
||||
&server_public_key,
|
||||
&client_public_key,
|
||||
client_version,
|
||||
server_version,
|
||||
client_kexinit_payload,
|
||||
server_kexinit_payload,
|
||||
)
|
||||
}
|
||||
|
||||
/// 构建SSH_MSG_KEXDH_REPLY packet（参考OpenSSH kex.c）
|
||||
fn build_kexdh_reply(
|
||||
&self,
|
||||
shared_secret: &[u8],
|
||||
exchange_hash: &[u8],
|
||||
host_key_blob: &[u8],
|
||||
server_public_key: &[u8],
|
||||
client_public_key: &[u8],
|
||||
client_version: &str,
|
||||
server_version: &str,
|
||||
client_kexinit_payload: &[u8],
|
||||
server_kexinit_payload: &[u8],
|
||||
) -> Result<SshPacket> {
|
||||
info!("=== Building SSH_MSG_KEXDH_REPLY ===");
|
||||
info!("Input server_public_key: {:?}", server_public_key);
|
||||
|
||||
let mut payload = Vec::new();
|
||||
|
||||
payload.write_u8(PacketType::SSH_MSG_KEXDH_REPLY as u8)?;
|
||||
|
||||
let host_key_ssh = self.build_ssh_host_key()?;
|
||||
payload.write_u32::<BigEndian>(host_key_ssh.len() as u32)?;
|
||||
payload.write_all(&host_key_ssh)?;
|
||||
payload.write_u32::<BigEndian>(host_key_blob.len() as u32)?;
|
||||
payload.write_all(host_key_blob)?;
|
||||
|
||||
info!("Writing server_public_key to payload (32 bytes)");
|
||||
payload.write_u32::<BigEndian>(32)?;
|
||||
payload.write_all(server_public_key)?;
|
||||
|
||||
let exchange_hash = self.compute_exchange_hash(
|
||||
shared_secret,
|
||||
&host_key_ssh,
|
||||
client_public_key,
|
||||
server_public_key,
|
||||
client_version,
|
||||
server_version,
|
||||
client_kexinit_payload,
|
||||
server_kexinit_payload,
|
||||
)?;
|
||||
|
||||
let signature = self.build_exchange_signature(&exchange_hash)?;
|
||||
let signature = self.build_exchange_signature(exchange_hash)?;
|
||||
payload.write_u32::<BigEndian>(signature.len() as u32)?;
|
||||
payload.write_all(&signature)?;
|
||||
|
||||
info!("SSH_MSG_KEXDH_REPLY payload built successfully");
|
||||
Ok(SshPacket::new(payload))
|
||||
}
|
||||
|
||||
@@ -195,32 +180,91 @@ impl KexExchangeHandler {
|
||||
) -> Result<Vec<u8>> {
|
||||
use sha2::{Sha256, Digest};
|
||||
|
||||
info!("=== EXCHANGE HASH COMPUTATION ===");
|
||||
info!("V_C (client version): {:?}", client_version.as_bytes());
|
||||
info!("V_C length: {}", client_version.len());
|
||||
|
||||
info!("V_S (server version): {:?}", server_version.as_bytes());
|
||||
info!("V_S length: {}", server_version.len());
|
||||
|
||||
info!("I_C (client KEXINIT payload): {:?}", &client_kexinit_payload[..std::cmp::min(50, client_kexinit_payload.len())]);
|
||||
info!("I_C length: {}", client_kexinit_payload.len());
|
||||
info!("I_C[0] (packet type): {} (should be SSH_MSG_KEXINIT=20)", client_kexinit_payload[0]);
|
||||
|
||||
info!("I_S (server KEXINIT payload): {:?}", &server_kexinit_payload[..std::cmp::min(50, server_kexinit_payload.len())]);
|
||||
info!("I_S length: {}", server_kexinit_payload.len());
|
||||
info!("I_S[0] (packet type): {} (should be SSH_MSG_KEXINIT=20)", server_kexinit_payload[0]);
|
||||
|
||||
info!("K_S (host key blob): {:?}", &host_key_blob[..std::cmp::min(30, host_key_blob.len())]);
|
||||
info!("K_S length: {}", host_key_blob.len());
|
||||
|
||||
info!("Q_C (client ECDH public key): {:?}", &client_public_key[..std::cmp::min(16, client_public_key.len())]);
|
||||
info!("Q_C full (32 bytes): {:?}", client_public_key);
|
||||
info!("Q_C length: {}", client_public_key.len());
|
||||
|
||||
info!("Q_S (server ECDH public key): {:?}", &server_public_key[..std::cmp::min(16, server_public_key.len())]);
|
||||
info!("Q_S full (32 bytes): {:?}", server_public_key);
|
||||
info!("Q_S length: {}", server_public_key.len());
|
||||
|
||||
let mut hasher = Sha256::new();
|
||||
|
||||
// RFC 4253 Section 7: V_C and V_S are version strings (without \r\n based on testing)
|
||||
hasher.update(&(client_version.len() as u32).to_be_bytes());
|
||||
let vc_ssh_string = &(client_version.len() as u32).to_be_bytes();
|
||||
hasher.update(vc_ssh_string);
|
||||
hasher.update(client_version.as_bytes());
|
||||
info!(" Exchange hash component V_C: len={} bytes=[{:?}] data=[{:?}]", 4+client_version.len(), vc_ssh_string, client_version.as_bytes());
|
||||
|
||||
hasher.update(&(server_version.len() as u32).to_be_bytes());
|
||||
let vs_ssh_string = &(server_version.len() as u32).to_be_bytes();
|
||||
hasher.update(vs_ssh_string);
|
||||
hasher.update(server_version.as_bytes());
|
||||
info!(" Exchange hash component V_S: len={} bytes=[{:?}] data=[{:?}]", 4+server_version.len(), vs_ssh_string, server_version.as_bytes());
|
||||
|
||||
hasher.update(&(client_kexinit_payload.len() as u32).to_be_bytes());
|
||||
hasher.update(client_kexinit_payload);
|
||||
// OpenSSH kexgex.c: "kexinit messages: fake header: len+SSH2_MSG_KEXINIT"
|
||||
// KEXINIT payload should NOT include SSH_MSG_KEXINIT type byte
|
||||
// OpenSSH stores payload starting from cookie, prepends SSH_MSG_KEXINIT in exchange hash
|
||||
|
||||
hasher.update(&(server_kexinit_payload.len() as u32).to_be_bytes());
|
||||
hasher.update(server_kexinit_payload);
|
||||
// Remove SSH_MSG_KEXINIT type byte from payloads (our payload includes it)
|
||||
let client_kexinit_without_type = &client_kexinit_payload[1..];
|
||||
let server_kexinit_without_type = &server_kexinit_payload[1..];
|
||||
|
||||
hasher.update(&(host_key_blob.len() as u32).to_be_bytes());
|
||||
info!("I_C (client KEXINIT without type byte): {} bytes (first byte should be cookie)", client_kexinit_without_type.len());
|
||||
info!("I_S (server KEXINIT without type byte): {} bytes", server_kexinit_without_type.len());
|
||||
|
||||
// Exchange hash: uint32(len+1) + uint8(SSH_MSG_KEXINIT) + payload_without_type
|
||||
let ic_len_bytes = &((client_kexinit_without_type.len() + 1) as u32).to_be_bytes();
|
||||
hasher.update(ic_len_bytes);
|
||||
hasher.update(&[20]); // SSH_MSG_KEXINIT type byte
|
||||
hasher.update(client_kexinit_without_type);
|
||||
info!(" Exchange hash component I_C: len={} bytes=[{:?}] type=[20] payload_len={} (first 8 bytes=[{:?}])", 4+1+client_kexinit_without_type.len(), ic_len_bytes, client_kexinit_without_type.len(), &client_kexinit_without_type[..std::cmp::min(8, client_kexinit_without_type.len())]);
|
||||
|
||||
let is_len_bytes = &((server_kexinit_without_type.len() + 1) as u32).to_be_bytes();
|
||||
hasher.update(is_len_bytes);
|
||||
hasher.update(&[20]); // SSH_MSG_KEXINIT type byte
|
||||
hasher.update(server_kexinit_without_type);
|
||||
info!(" Exchange hash component I_S: len={} bytes=[{:?}] type=[20] payload_len={} (first 8 bytes=[{:?}])", 4+1+server_kexinit_without_type.len(), is_len_bytes, server_kexinit_without_type.len(), &server_kexinit_without_type[..std::cmp::min(8, server_kexinit_without_type.len())]);
|
||||
|
||||
let ks_len_bytes = &(host_key_blob.len() as u32).to_be_bytes();
|
||||
hasher.update(ks_len_bytes);
|
||||
hasher.update(host_key_blob);
|
||||
info!(" Exchange hash component K_S: len={} bytes=[{:?}] blob_len={} (full=[{:?}])", 4+host_key_blob.len(), ks_len_bytes, host_key_blob.len(), host_key_blob);
|
||||
|
||||
hasher.update(&(client_public_key.len() as u32).to_be_bytes());
|
||||
let qc_len_bytes = &(client_public_key.len() as u32).to_be_bytes();
|
||||
hasher.update(qc_len_bytes);
|
||||
hasher.update(client_public_key);
|
||||
info!(" Exchange hash component Q_C: len={} bytes=[{:?}] key=[{:?}]", 4+client_public_key.len(), qc_len_bytes, client_public_key);
|
||||
|
||||
hasher.update(&(server_public_key.len() as u32).to_be_bytes());
|
||||
let qs_len_bytes = &(server_public_key.len() as u32).to_be_bytes();
|
||||
hasher.update(qs_len_bytes);
|
||||
hasher.update(server_public_key);
|
||||
info!(" Exchange hash component Q_S: len={} bytes=[{:?}] key=[{:?}]", 4+server_public_key.len(), qs_len_bytes, server_public_key);
|
||||
|
||||
info!("Exchange hash components:");
|
||||
info!(" shared_secret raw ({} bytes): {:?}", shared_secret.len(), &shared_secret[..std::cmp::min(8, shared_secret.len())]);
|
||||
info!(" shared_secret raw full (32 bytes): {:?}", shared_secret);
|
||||
|
||||
// RFC 8731 Section 3.1: X25519 output is little-endian
|
||||
// OpenSSH sshbuf_put_bignum2_bytes() uses bytes DIRECTLY (no reversal)
|
||||
// Treats little-endian bytes as big-endian mpint (logical reinterpret)
|
||||
info!(" Using shared_secret directly (little-endian bytes as big-endian mpint)");
|
||||
|
||||
// RFC 4253: mpint格式 = 去掉前导零 + 最高位>=0x80时前面加0
|
||||
// 参考OpenSSH sshbuf_put_bignum2_bytes()
|
||||
@@ -230,7 +274,7 @@ impl KexExchangeHandler {
|
||||
}
|
||||
let trimmed_shared_secret = &shared_secret[start..];
|
||||
|
||||
info!(" shared_secret after removing leading zeros ({} bytes): {:?}", trimmed_shared_secret.len(), &trimmed_shared_secret[..std::cmp::min(8, trimmed_shared_secret.len())]);
|
||||
info!(" shared_secret after removing leading zeros ({} bytes): {:?}", trimmed_shared_secret.len(), trimmed_shared_secret);
|
||||
|
||||
let mpint_shared_secret_data = if trimmed_shared_secret.len() > 0 && trimmed_shared_secret[0] >= 0x80 {
|
||||
let mut mpint = vec![0u8];
|
||||
@@ -244,8 +288,10 @@ impl KexExchangeHandler {
|
||||
info!(" mpint_shared_secret_data ({} bytes): {:?}", mpint_shared_secret_data.len(), &mpint_shared_secret_data[..std::cmp::min(8, mpint_shared_secret_data.len())]);
|
||||
|
||||
// mpint格式 = uint32(length) + mpint_data
|
||||
hasher.update(&(mpint_shared_secret_data.len() as u32).to_be_bytes());
|
||||
let mpint_len_bytes = &(mpint_shared_secret_data.len() as u32).to_be_bytes();
|
||||
hasher.update(mpint_len_bytes);
|
||||
hasher.update(&mpint_shared_secret_data);
|
||||
info!(" Exchange hash component K (shared secret mpint): len={} bytes=[{:?}] data_len={} (first 8 bytes=[{:?}])", 4+mpint_shared_secret_data.len(), mpint_len_bytes, mpint_shared_secret_data.len(), &mpint_shared_secret_data[..std::cmp::min(8, mpint_shared_secret_data.len())]);
|
||||
|
||||
Ok(hasher.finalize().to_vec())
|
||||
}
|
||||
|
||||
@@ -15,6 +15,7 @@ pub enum PacketType {
|
||||
SSH_MSG_DEBUG = 4,
|
||||
SSH_MSG_SERVICE_REQUEST = 5,
|
||||
SSH_MSG_SERVICE_ACCEPT = 6,
|
||||
SSH_MSG_EXT_INFO = 7,
|
||||
SSH_MSG_KEXINIT = 20,
|
||||
SSH_MSG_NEWKEYS = 21,
|
||||
|
||||
@@ -175,6 +176,7 @@ impl SshPacket {
|
||||
4 => Ok(PacketType::SSH_MSG_DEBUG),
|
||||
5 => Ok(PacketType::SSH_MSG_SERVICE_REQUEST),
|
||||
6 => Ok(PacketType::SSH_MSG_SERVICE_ACCEPT),
|
||||
7 => Ok(PacketType::SSH_MSG_EXT_INFO),
|
||||
20 => Ok(PacketType::SSH_MSG_KEXINIT),
|
||||
21 => Ok(PacketType::SSH_MSG_NEWKEYS),
|
||||
30 => Ok(PacketType::SSH_MSG_KEXDH_INIT),
|
||||
|
||||
@@ -190,12 +190,20 @@ fn perform_ssh_auth(
|
||||
encryption_ctx.iv_stoc.len()
|
||||
);
|
||||
|
||||
let encrypted_request = EncryptedPacket::read(stream, encryption_ctx, true)?; // Reading from client, use cipher_ctos
|
||||
info!("Received encrypted SSH_MSG_SERVICE_REQUEST");
|
||||
// OpenSSH strict KEX: SSH_MSG_EXT_INFO may be sent before SSH_MSG_SERVICE_REQUEST
|
||||
let mut encrypted_request = EncryptedPacket::read(stream, encryption_ctx, true)?;
|
||||
let payload = encrypted_request.payload();
|
||||
|
||||
if payload[0] == PacketType::SSH_MSG_EXT_INFO as u8 {
|
||||
info!("Received SSH_MSG_EXT_INFO, reading next packet");
|
||||
encrypted_request = EncryptedPacket::read(stream, encryption_ctx, true)?;
|
||||
}
|
||||
|
||||
let payload = encrypted_request.payload();
|
||||
info!("Received packet type: {}", payload[0]);
|
||||
|
||||
if payload[0] != PacketType::SSH_MSG_SERVICE_REQUEST as u8 {
|
||||
return Err(anyhow!("Expected SSH_MSG_SERVICE_REQUEST"));
|
||||
return Err(anyhow!("Expected SSH_MSG_SERVICE_REQUEST, got type {}", payload[0]));
|
||||
}
|
||||
|
||||
use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
|
||||
|
||||
Reference in New Issue
Block a user