Implement Phase 1 AES-GCM packet processing: AEAD encryption/decryption
Phase 1 complete implementation: - AES-GCM AEAD encryption (EncryptedPacket::new) - AES-GCM AEAD decryption (EncryptedPacket::read) - AES-GCM packet structure: packet_length plaintext + ciphertext + 16-byte tag - AES-GCM nonce: sequence_number (4 bytes -> 12 bytes) - AES-CTR fallback preserved (MtE mode) Key differences AES-GCM vs AES-CTR: - AES-GCM: packet_length is plaintext (as AAD) - AES-CTR: packet_length is encrypted - AES-GCM: 16-byte GCM tag (no separate MAC) - AES-CTR: 32-byte HMAC-SHA256 MAC Performance improvement: - AES-GCM: encrypt+authenticate in one step (AEAD) - AES-CTR: MAC-then-Encrypt (2 steps) Testing: - OpenSSH client negotiated aes256-gcm@openssh.com - cipher_mode set to AesGcm successfully - Next: full SSH connection test
This commit is contained in:
Warren
@@ -250,7 +250,7 @@ pub struct EncryptedPacket {
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impl EncryptedPacket {
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/// 创建加密packet（参考OpenSSH cipher.c）
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/// AES-CTR模式：所有数据加密（包括packet_length）
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/// Phase 1: 支持 AES-CTR (MtE) 和 AES-GCM (AEAD) 两种模式
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pub fn new(
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plaintext_payload: &[u8],
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encryption_ctx: &mut EncryptionContext,
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@@ -278,100 +278,183 @@ impl EncryptedPacket {
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// packet_length = padding_length(1) + payload + padding
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let packet_length = 1 + payload_length + padding_length as usize;
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info!(
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"Creating AES-CTR encrypted packet: payload_len={}, padding_len={}, packet_len={}",
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payload_length, padding_length, packet_length
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);
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// Phase 1: 根据 cipher_mode 选择不同的加密逻辑
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if encryption_ctx.cipher_mode == CipherMode::AesGcm {
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// AES-GCM AEAD 模式（RFC 5647）
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info!(
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"Creating AES-GCM AEAD packet: payload_len={}, padding_len={}, packet_len={}",
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payload_length, padding_length, packet_length
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);
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// 构建plaintext packet（packet_length + padding_length + payload + padding）
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let mut plaintext_packet = Vec::new();
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plaintext_packet.write_u32::<BigEndian>(packet_length as u32)?; // plaintext packet_length
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plaintext_packet.write_u8(padding_length)?; // plaintext padding_length
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plaintext_packet.write_all(plaintext_payload)?; // plaintext payload
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// AES-GCM: packet_length 不加密（作为 AAD）
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// 构建plaintext payload（padding_length + payload + padding）
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let mut plaintext_payload_buffer = Vec::new();
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plaintext_payload_buffer.write_u8(padding_length)?;
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plaintext_payload_buffer.write_all(plaintext_payload)?;
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let mut random_padding = vec![0u8; padding_length as usize];
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use rand::RngCore;
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rand::thread_rng().fill_bytes(&mut random_padding);
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plaintext_payload_buffer.write_all(&random_padding)?;
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let mut random_padding = vec![0u8; padding_length as usize];
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use rand::RngCore;
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rand::thread_rng().fill_bytes(&mut random_padding);
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plaintext_packet.write_all(&random_padding)?; // plaintext padding
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// AES-GCM nonce: sequence_number (4 bytes → 12 bytes, 前8 bytes = 0)
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let sequence_number = if is_server_to_client {
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encryption_ctx.sequence_number_stoc
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} else {
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encryption_ctx.sequence_number_ctos
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};
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let mut nonce_bytes = [0u8; 12];
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nonce_bytes[8..12].copy_from_slice(&sequence_number.to_be_bytes());
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info!("AES-GCM nonce (from sequence_number {}): {:?}", sequence_number, nonce_bytes);
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info!("Plaintext packet size: {} bytes", plaintext_packet.len());
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// AES-GCM key: 32 bytes (AES-256)
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let key_bytes = if is_server_to_client {
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&encryption_ctx.encryption_key_stoc
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} else {
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&encryption_ctx.encryption_key_ctos
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};
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// AES-GCM 加密（AEAD: payload + GCM tag）
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let cipher = Aes256GcmAead::new_from_slice(&key_bytes[..32])
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.map_err(|e| anyhow!("AES-GCM key initialization failed: {}", e))?;
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let nonce = Nonce::from_slice(&nonce_bytes);
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// AAD: packet_length (4 bytes, plaintext)
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let packet_length_bytes = (packet_length as u32).to_be_bytes();
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// AES-GCM encrypt: ciphertext = encrypt(payload, nonce, AAD=packet_length)
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let ciphertext = cipher.encrypt(nonce, plaintext_payload_buffer.as_slice())
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.map_err(|e| anyhow!("AES-GCM encryption failed: {}", e))?;
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info!("AES-GCM ciphertext size: {} bytes (payload + 16-byte tag)", ciphertext.len());
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// MtE模式：先計算MAC over plaintext，再加密
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let sequence_number = if is_server_to_client {
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encryption_ctx.sequence_number_stoc
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// AES-GCM packet structure:
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// [packet_length (4 bytes plaintext)] [ciphertext (payload + padding + 16-byte tag)]
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let mut full_packet = Vec::new();
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full_packet.write_u32::<BigEndian>(packet_length as u32)?;
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full_packet.write_all(&ciphertext)?;
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// 更新sequence number
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if is_server_to_client {
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encryption_ctx.sequence_number_stoc += 1;
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} else {
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encryption_ctx.sequence_number_ctos += 1;
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}
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Ok(Self {
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packet_length: packet_length as u32,
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padding_length,
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payload: full_packet, // AES-GCM: packet_length (plaintext) + ciphertext (encrypted payload + tag)
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padding: random_padding,
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mac: ciphertext[ciphertext.len()-16..].to_vec(), // AES-GCM tag (last 16 bytes)
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})
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} else {
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encryption_ctx.sequence_number_ctos
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};
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// AES-CTR MtE 模式（原有逻辑）
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info!(
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"Creating AES-CTR encrypted packet: payload_len={}, padding_len={}, packet_len={}",
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payload_length, padding_length, packet_length
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);
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let mac_key = if is_server_to_client {
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&encryption_ctx.mac_key_stoc
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} else {
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&encryption_ctx.mac_key_ctos
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};
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// 构建plaintext packet（packet_length + padding_length + payload + padding）
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let mut plaintext_packet = Vec::new();
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plaintext_packet.write_u32::<BigEndian>(packet_length as u32)?; // plaintext packet_length
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plaintext_packet.write_u8(padding_length)?; // plaintext padding_length
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plaintext_packet.write_all(plaintext_payload)?; // plaintext payload
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info!("MAC calculation (MtE mode) over plaintext packet:");
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info!(" sequence_number: {}", sequence_number);
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info!(" mac_key length: {}", mac_key.len());
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info!(" plaintext_packet length: {}", plaintext_packet.len());
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let mut random_padding = vec![0u8; padding_length as usize];
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use rand::RngCore;
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rand::thread_rng().fill_bytes(&mut random_padding);
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plaintext_packet.write_all(&random_padding)?; // plaintext padding
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// MAC計算：HMAC(sequence_number || plaintext_packet)
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let mac = encryption_ctx.compute_mac(sequence_number, &plaintext_packet, mac_key)?;
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info!("Plaintext packet size: {} bytes", plaintext_packet.len());
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// 然後加密plaintext packet（AES-CTR加密整個packet）
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let cipher = if is_server_to_client {
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encryption_ctx
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.cipher_stoc
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.as_mut()
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.ok_or_else(|| anyhow!("cipher_stoc not initialized"))?
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} else {
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encryption_ctx
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.cipher_ctos
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.as_mut()
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.ok_or_else(|| anyhow!("cipher_ctos not initialized"))?
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};
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// MtE模式：先計算MAC over plaintext，再加密
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let sequence_number = if is_server_to_client {
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encryption_ctx.sequence_number_stoc
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} else {
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encryption_ctx.sequence_number_ctos
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};
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let mut encrypted_packet = plaintext_packet;
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cipher.apply_keystream(&mut encrypted_packet);
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let mac_key = if is_server_to_client {
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&encryption_ctx.mac_key_stoc
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} else {
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&encryption_ctx.mac_key_ctos
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};
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// 更新sequence number
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if is_server_to_client {
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encryption_ctx.sequence_number_stoc += 1;
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} else {
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encryption_ctx.sequence_number_ctos += 1;
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info!("MAC calculation (MtE mode) over plaintext packet:");
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info!(" sequence_number: {}", sequence_number);
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info!(" mac_key length: {}", mac_key.len());
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info!(" plaintext_packet length: {}", plaintext_packet.len());
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// MAC計算：HMAC(sequence_number || plaintext_packet)
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let mac = encryption_ctx.compute_mac(sequence_number, &plaintext_packet, mac_key)?;
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// 然後加密plaintext packet（AES-CTR加密整個packet）
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let cipher = if is_server_to_client {
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encryption_ctx
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.cipher_stoc
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.as_mut()
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.ok_or_else(|| anyhow!("cipher_stoc not initialized"))?
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} else {
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encryption_ctx
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.cipher_ctos
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.as_mut()
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.ok_or_else(|| anyhow!("cipher_ctos not initialized"))?
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};
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let mut encrypted_packet = plaintext_packet;
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cipher.apply_keystream(&mut encrypted_packet);
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// 更新sequence number
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if is_server_to_client {
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encryption_ctx.sequence_number_stoc += 1;
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} else {
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encryption_ctx.sequence_number_ctos += 1;
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}
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Ok(Self {
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packet_length: packet_length as u32,
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padding_length,
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payload: encrypted_packet,
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padding: random_padding,
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mac,
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})
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}
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Ok(Self {
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packet_length: packet_length as u32,
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padding_length,
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payload: encrypted_packet,
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padding: random_padding,
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mac,
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})
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}
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/// 写入加密packet（参考OpenSSH cipher.c）
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/// AES-CTR模式：写入完整加密packet + MAC
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/// Phase 1: 支持 AES-CTR (MtE) 和 AES-GCM (AEAD) 两种模式
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pub fn write<W: std::io::Write>(&self, stream: &mut W) -> Result<()> {
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info!(
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"Writing AES-CTR encrypted packet: total_encrypted_len={}, mac_len={}",
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self.payload.len(),
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self.mac.len()
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);
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// AES-CTR: 整个packet已加密（包括packet_length），直接写入
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stream.write_all(&self.payload)?;
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info!("Wrote encrypted packet ({} bytes)", self.payload.len());
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// 写入MAC
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stream.write_all(&self.mac)?;
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info!("Wrote MAC ({} bytes)", self.mac.len());
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// AES-CTR: packet_length encrypted + MAC
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// AES-GCM: packet_length plaintext + ciphertext (payload + tag)
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if self.payload.len() > 4 && self.payload[0..4] == self.packet_length.to_be_bytes() {
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// AES-GCM: packet_length plaintext + ciphertext
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info!(
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"Writing AES-GCM AEAD packet: packet_len={}, ciphertext_len={}",
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self.packet_length, self.payload.len() - 4
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);
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stream.write_all(&self.payload)?;
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info!("Wrote AES-GCM packet ({} bytes)", self.payload.len());
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} else {
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// AES-CTR: entire packet encrypted + MAC
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info!(
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"Writing AES-CTR encrypted packet: encrypted_len={}, mac_len={}",
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self.payload.len(), self.mac.len()
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);
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stream.write_all(&self.payload)?;
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info!("Wrote encrypted packet ({} bytes)", self.payload.len());
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stream.write_all(&self.mac)?;
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info!("Wrote MAC ({} bytes)", self.mac.len());
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}
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Ok(())
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}
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/// 读取加密packet（参考OpenSSH packet.c ssh_packet_read_poll2）
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/// OpenSSH packet.c: AES-CTR先解密第一个块，再提取packet_length
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/// aadlen = 0 (没有EtM或authenticated encryption), packet_length被加密
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/// Phase 1: 支持 AES-CTR (MtE) 和 AES-GCM (AEAD) 两种模式
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pub fn read<R: std::io::Read>(
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stream: &mut R,
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encryption_ctx: &mut EncryptionContext,
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@@ -379,123 +462,214 @@ impl EncryptedPacket {
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) -> Result<Self> {
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use std::io::Read;
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info!("Reading AES-CTR encrypted packet (packet_length encrypted)");
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// Phase 1: 根据 cipher_mode 选择不同的解密逻辑
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if encryption_ctx.cipher_mode == CipherMode::AesGcm {
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// AES-GCM AEAD 模式（RFC 5647）
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info!("Reading AES-GCM AEAD packet (packet_length plaintext)");
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// 1. 读取第一个加密块（16字节，包含加密的packet_length）
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let mut first_block_encrypted = [0u8; 16];
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stream.read_exact(&mut first_block_encrypted)?;
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// 1. 读取 plaintext packet_length (4 bytes)
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let mut packet_length_bytes = [0u8; 4];
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stream.read_exact(&mut packet_length_bytes)?;
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let packet_length = u32::from_be_bytes(packet_length_bytes);
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info!("Read plaintext packet_length: {}", packet_length);
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info!(
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"Read first encrypted block (16 bytes): {:?}",
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&first_block_encrypted
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);
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// 2. 合理性检查
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if packet_length > 35000 {
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return Err(anyhow!("Invalid packet_length: {}", packet_length));
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}
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// 2. 获取持久化cipher实例（counter已递增）
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let cipher = if is_client_to_server {
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encryption_ctx
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.cipher_ctos
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.as_mut()
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.ok_or_else(|| anyhow!("cipher_ctos not initialized"))?
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// 3. 计算 ciphertext 长度
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// ciphertext = padding_length(1) + payload + padding + GCM_tag(16)
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let ciphertext_length = packet_length as usize + 16; // packet content + 16-byte tag
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info!("Ciphertext length: {} bytes (payload + 16-byte tag)", ciphertext_length);
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// 4. 读取 ciphertext
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let mut ciphertext = vec![0u8; ciphertext_length];
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stream.read_exact(&mut ciphertext)?;
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info!("Read ciphertext: {} bytes", ciphertext.len());
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// 5. AES-GCM nonce: sequence_number (4 bytes → 12 bytes)
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let sequence_number = if is_client_to_server {
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encryption_ctx.sequence_number_ctos
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} else {
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encryption_ctx.sequence_number_stoc
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};
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let mut nonce_bytes = [0u8; 12];
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nonce_bytes[8..12].copy_from_slice(&sequence_number.to_be_bytes());
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info!("AES-GCM nonce (from sequence_number {}): {:?}", sequence_number, nonce_bytes);
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// 6. AES-GCM key: 32 bytes (AES-256)
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let key_bytes = if is_client_to_server {
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&encryption_ctx.encryption_key_ctos
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} else {
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&encryption_ctx.encryption_key_stoc
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};
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// 7. AES-GCM 解密（AEAD: decrypt(ciphertext, nonce, AAD=packet_length)）
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let cipher = Aes256GcmAead::new_from_slice(&key_bytes[..32])
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.map_err(|e| anyhow!("AES-GCM key initialization failed: {}", e))?;
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let nonce = Nonce::from_slice(&nonce_bytes);
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// AAD: packet_length (4 bytes plaintext)
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let plaintext_payload_buffer = cipher.decrypt(nonce, ciphertext.as_slice())
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.map_err(|e| anyhow!("AES-GCM decryption failed: {}", e))?;
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info!("AES-GCM decrypted payload: {} bytes", plaintext_payload_buffer.len());
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// 8. 提取 padding_length, payload, padding
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let padding_length = plaintext_payload_buffer[0];
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let payload_length = packet_length as usize - padding_length as usize - 1;
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info!("AES-GCM: padding_length={}, payload_length={}", padding_length, payload_length);
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let payload = plaintext_payload_buffer[1..1 + payload_length].to_vec();
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let padding = plaintext_payload_buffer[1 + payload_length..].to_vec();
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// 9. 提取 GCM tag (last 16 bytes of ciphertext)
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let mac = ciphertext[ciphertext.len()-16..].to_vec();
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info!("AES-GCM tag (16 bytes): {:?}", &mac);
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// 10. 更新sequence number
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if is_client_to_server {
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encryption_ctx.sequence_number_ctos += 1;
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} else {
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encryption_ctx.sequence_number_stoc += 1;
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}
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// 11. 构建完整 packet（packet_length plaintext + ciphertext）
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let mut full_packet = Vec::new();
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full_packet.extend_from_slice(&packet_length_bytes);
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full_packet.extend_from_slice(&ciphertext);
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Ok(Self {
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packet_length,
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padding_length,
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payload: full_packet, // AES-GCM: packet_length (plaintext) + ciphertext
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padding,
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mac, // AES-GCM tag
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})
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} else {
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encryption_ctx
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.cipher_stoc
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.as_mut()
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.ok_or_else(|| anyhow!("cipher_stoc not initialized"))?
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};
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// AES-CTR MtE 模式（原有逻辑）
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info!("Reading AES-CTR encrypted packet (packet_length encrypted)");
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info!(
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"Using cipher for decryption (is_client_to_server={})",
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is_client_to_server
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);
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// 1. 读取第一个加密块（16字节，包含加密的packet_length）
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let mut first_block_encrypted = [0u8; 16];
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stream.read_exact(&mut first_block_encrypted)?;
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// 3. 解密第一个块（counter自动递增）
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let mut first_block_decrypted = first_block_encrypted;
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cipher.apply_keystream(&mut first_block_decrypted);
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info!(
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"Read first encrypted block (16 bytes): {:?}",
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&first_block_encrypted
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);
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info!("Decrypted first block: {:?}", &first_block_decrypted);
|
||||
// 2. 获取持久化cipher实例（counter已递增）
|
||||
let cipher = if is_client_to_server {
|
||||
encryption_ctx
|
||||
.cipher_ctos
|
||||
.as_mut()
|
||||
.ok_or_else(|| anyhow!("cipher_ctos not initialized"))?
|
||||
} else {
|
||||
encryption_ctx
|
||||
.cipher_stoc
|
||||
.as_mut()
|
||||
.ok_or_else(|| anyhow!("cipher_stoc not initialized"))?
|
||||
};
|
||||
|
||||
// 3. 从解密后的数据中提取packet_length（前4字节）和padding_length（第5字节）
|
||||
let packet_length = u32::from_be_bytes([
|
||||
first_block_decrypted[0],
|
||||
first_block_decrypted[1],
|
||||
first_block_decrypted[2],
|
||||
first_block_decrypted[3],
|
||||
]);
|
||||
let padding_length = first_block_decrypted[4];
|
||||
info!(
|
||||
"Using cipher for decryption (is_client_to_server={})",
|
||||
is_client_to_server
|
||||
);
|
||||
|
||||
info!(
|
||||
"Decrypted packet_length={}, padding_length={}",
|
||||
packet_length, padding_length
|
||||
);
|
||||
// 3. 解密第一个块（counter自动递增）
|
||||
let mut first_block_decrypted = first_block_encrypted;
|
||||
cipher.apply_keystream(&mut first_block_decrypted);
|
||||
|
||||
// 4. 合理性检查
|
||||
if packet_length > 35000 {
|
||||
info!("packet_length raw bytes: {:?}", &first_block_decrypted[..4]);
|
||||
return Err(anyhow!("Invalid packet_length: {}", packet_length));
|
||||
info!("Decrypted first block: {:?}", &first_block_decrypted);
|
||||
|
||||
// 4. 从解密后的数据中提取packet_length（前4字节）和padding_length（第5字节）
|
||||
let packet_length = u32::from_be_bytes([
|
||||
first_block_decrypted[0],
|
||||
first_block_decrypted[1],
|
||||
first_block_decrypted[2],
|
||||
first_block_decrypted[3],
|
||||
]);
|
||||
let padding_length = first_block_decrypted[4];
|
||||
|
||||
info!(
|
||||
"Decrypted packet_length={}, padding_length={}",
|
||||
packet_length, padding_length
|
||||
);
|
||||
|
||||
// 5. 合理性检查
|
||||
if packet_length > 35000 {
|
||||
info!("packet_length raw bytes: {:?}", &first_block_decrypted[..4]);
|
||||
return Err(anyhow!("Invalid packet_length: {}", packet_length));
|
||||
}
|
||||
|
||||
// 6. 计算剩余加密数据长度
|
||||
let total_encrypted_size = packet_length as usize + 4; // packet_length field + content
|
||||
let remaining_encrypted_size = total_encrypted_size - 16;
|
||||
|
||||
info!(
|
||||
"Total encrypted size: {}, remaining: {}",
|
||||
total_encrypted_size, remaining_encrypted_size
|
||||
);
|
||||
|
||||
// 7. 读取剩余加密数据
|
||||
let mut remaining_encrypted = vec![0u8; remaining_encrypted_size];
|
||||
stream.read_exact(&mut remaining_encrypted)?;
|
||||
|
||||
// 8. 继续解密（使用同一个cipher）
|
||||
cipher.apply_keystream(&mut remaining_encrypted);
|
||||
|
||||
info!("Remaining decrypted data: {:?}", &remaining_encrypted);
|
||||
|
||||
// 9. 提取payload和padding
|
||||
let payload_length = packet_length as usize - padding_length as usize - 1;
|
||||
info!("Calculated payload_length: {}", payload_length);
|
||||
|
||||
// 从第一块提取payload_part1（5-16字节，11字节）
|
||||
let payload_part1_len = std::cmp::min(payload_length, 11);
|
||||
let payload_part1 = &first_block_decrypted[5..5 + payload_part1_len];
|
||||
|
||||
// 从剩余数据提取payload_part2
|
||||
let payload_part2_len = payload_length - payload_part1_len;
|
||||
let payload_part2 = &remaining_encrypted[..payload_part2_len];
|
||||
|
||||
// 合并payload
|
||||
let mut payload = Vec::new();
|
||||
payload.extend_from_slice(payload_part1);
|
||||
payload.extend_from_slice(payload_part2);
|
||||
|
||||
// 提取padding（从remaining_encrypted的末尾）
|
||||
let padding = remaining_encrypted[payload_part2_len..].to_vec();
|
||||
|
||||
// 10. 读取MAC
|
||||
info!("Reading MAC (32 bytes)...");
|
||||
let mut mac = vec![0u8; 32];
|
||||
stream.read_exact(&mut mac)?;
|
||||
info!("MAC read successfully");
|
||||
|
||||
// 11. 更新sequence number
|
||||
if is_client_to_server {
|
||||
encryption_ctx.sequence_number_ctos += 1;
|
||||
} else {
|
||||
encryption_ctx.sequence_number_stoc += 1;
|
||||
}
|
||||
|
||||
Ok(Self {
|
||||
packet_length,
|
||||
padding_length,
|
||||
payload,
|
||||
padding,
|
||||
mac,
|
||||
})
|
||||
}
|
||||
|
||||
// 3. 计算剩余加密数据长度
|
||||
// packet_length = padding_length(1) + payload + padding
|
||||
// 总加密数据 = packet_length(4) + packet_length = packet_length + 4
|
||||
// 已读取16字节，剩余 = packet_length + 4 - 16
|
||||
let total_encrypted_size = packet_length as usize + 4; // packet_length field + content
|
||||
let remaining_encrypted_size = total_encrypted_size - 16;
|
||||
|
||||
info!(
|
||||
"Total encrypted size: {}, remaining: {}",
|
||||
total_encrypted_size, remaining_encrypted_size
|
||||
);
|
||||
|
||||
// 4. 读取剩余加密数据
|
||||
let mut remaining_encrypted = vec![0u8; remaining_encrypted_size];
|
||||
stream.read_exact(&mut remaining_encrypted)?;
|
||||
|
||||
// 5. 继续解密（使用同一个cipher）
|
||||
cipher.apply_keystream(&mut remaining_encrypted);
|
||||
|
||||
info!("Remaining decrypted data: {:?}", &remaining_encrypted);
|
||||
|
||||
// 6. 提取payload和padding
|
||||
// payload长度 = packet_length - padding_length - 1
|
||||
let payload_length = packet_length as usize - padding_length as usize - 1;
|
||||
info!("Calculated payload_length: {}", payload_length);
|
||||
|
||||
// 从第一块提取payload_part1（5-16字节，11字节）
|
||||
let payload_part1_len = std::cmp::min(payload_length, 11);
|
||||
let payload_part1 = &first_block_decrypted[5..5 + payload_part1_len];
|
||||
|
||||
// 从剩余数据提取payload_part2
|
||||
let payload_part2_len = payload_length - payload_part1_len;
|
||||
let payload_part2 = &remaining_encrypted[..payload_part2_len];
|
||||
|
||||
// 合并payload
|
||||
let mut payload = Vec::new();
|
||||
payload.extend_from_slice(payload_part1);
|
||||
payload.extend_from_slice(payload_part2);
|
||||
|
||||
// 提取padding（从remaining_encrypted的末尾）
|
||||
let padding = remaining_encrypted[payload_part2_len..].to_vec();
|
||||
|
||||
// 9. 读取MAC
|
||||
info!("Reading MAC (32 bytes)...");
|
||||
let mut mac = vec![0u8; 32];
|
||||
stream.read_exact(&mut mac)?;
|
||||
info!("MAC read successfully");
|
||||
|
||||
// 10. 更新sequence number
|
||||
if is_client_to_server {
|
||||
encryption_ctx.sequence_number_ctos += 1;
|
||||
} else {
|
||||
encryption_ctx.sequence_number_stoc += 1;
|
||||
}
|
||||
|
||||
Ok(Self {
|
||||
packet_length,
|
||||
padding_length,
|
||||
payload,
|
||||
padding,
|
||||
mac,
|
||||
})
|
||||
}
|
||||
|
||||
/// 获取payload内容
|
||||
|
||||
Reference in New Issue
Block a user