Initial commit

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-05-31 18:45:31 +08:00
commit e0a986eb30
1018 changed files with 615974 additions and 0 deletions
@@ -0,0 +1,356 @@
+'use strict';
+
+const crypto = require('crypto');
+
+let cpuInfo;
+try {
+  cpuInfo = require('cpu-features')();
+} catch {}
+
+const { bindingAvailable, CIPHER_INFO, MAC_INFO } = require('./crypto.js');
+
+const eddsaSupported = (() => {
+  if (typeof crypto.sign === 'function'
+      && typeof crypto.verify === 'function') {
+    const key =
+      '-----BEGIN PRIVATE KEY-----\r\nMC4CAQAwBQYDK2VwBCIEIHKj+sVa9WcD'
+      + '/q2DJUJaf43Kptc8xYuUQA4bOFj9vC8T\r\n-----END PRIVATE KEY-----';
+    const data = Buffer.from('a');
+    let sig;
+    let verified;
+    try {
+      sig = crypto.sign(null, data, key);
+      verified = crypto.verify(null, data, key, sig);
+    } catch {}
+    return (Buffer.isBuffer(sig) && sig.length === 64 && verified === true);
+  }
+
+  return false;
+})();
+
+const curve25519Supported = (typeof crypto.diffieHellman === 'function'
+                             && typeof crypto.generateKeyPairSync === 'function'
+                             && typeof crypto.createPublicKey === 'function');
+
+const DEFAULT_KEX = [
+  // https://tools.ietf.org/html/rfc5656#section-10.1
+  'ecdh-sha2-nistp256',
+  'ecdh-sha2-nistp384',
+  'ecdh-sha2-nistp521',
+
+  // https://tools.ietf.org/html/rfc4419#section-4
+  'diffie-hellman-group-exchange-sha256',
+
+  // https://tools.ietf.org/html/rfc8268
+  'diffie-hellman-group14-sha256',
+  'diffie-hellman-group15-sha512',
+  'diffie-hellman-group16-sha512',
+  'diffie-hellman-group17-sha512',
+  'diffie-hellman-group18-sha512',
+];
+if (curve25519Supported) {
+  DEFAULT_KEX.unshift('curve25519-sha256');
+  DEFAULT_KEX.unshift('curve25519-sha256@libssh.org');
+}
+const SUPPORTED_KEX = DEFAULT_KEX.concat([
+  // https://tools.ietf.org/html/rfc4419#section-4
+  'diffie-hellman-group-exchange-sha1',
+
+  'diffie-hellman-group14-sha1', // REQUIRED
+  'diffie-hellman-group1-sha1',  // REQUIRED
+]);
+
+
+const DEFAULT_SERVER_HOST_KEY = [
+  'ecdsa-sha2-nistp256',
+  'ecdsa-sha2-nistp384',
+  'ecdsa-sha2-nistp521',
+  'rsa-sha2-512', // RFC 8332
+  'rsa-sha2-256', // RFC 8332
+  'ssh-rsa',
+];
+if (eddsaSupported)
+  DEFAULT_SERVER_HOST_KEY.unshift('ssh-ed25519');
+const SUPPORTED_SERVER_HOST_KEY = DEFAULT_SERVER_HOST_KEY.concat([
+  'ssh-dss',
+]);
+
+
+const canUseCipher = (() => {
+  const ciphers = crypto.getCiphers();
+  return (name) => ciphers.includes(CIPHER_INFO[name].sslName);
+})();
+let DEFAULT_CIPHER = [
+  // http://tools.ietf.org/html/rfc5647
+  'aes128-gcm@openssh.com',
+  'aes256-gcm@openssh.com',
+
+  // http://tools.ietf.org/html/rfc4344#section-4
+  'aes128-ctr',
+  'aes192-ctr',
+  'aes256-ctr',
+];
+if (cpuInfo && cpuInfo.flags && !cpuInfo.flags.aes) {
+  // We know for sure the CPU does not support AES acceleration
+  if (bindingAvailable)
+    DEFAULT_CIPHER.unshift('chacha20-poly1305@openssh.com');
+  else
+    DEFAULT_CIPHER.push('chacha20-poly1305@openssh.com');
+} else if (bindingAvailable && cpuInfo && cpuInfo.arch === 'x86') {
+  // Places chacha20-poly1305 immediately after GCM ciphers since GCM ciphers
+  // seem to outperform it on x86, but it seems to be faster than CTR ciphers
+  DEFAULT_CIPHER.splice(4, 0, 'chacha20-poly1305@openssh.com');
+} else {
+  DEFAULT_CIPHER.push('chacha20-poly1305@openssh.com');
+}
+DEFAULT_CIPHER = DEFAULT_CIPHER.filter(canUseCipher);
+const SUPPORTED_CIPHER = DEFAULT_CIPHER.concat([
+  'aes256-cbc',
+  'aes192-cbc',
+  'aes128-cbc',
+  'blowfish-cbc',
+  '3des-cbc',
+  'aes128-gcm',
+  'aes256-gcm',
+
+  // http://tools.ietf.org/html/rfc4345#section-4:
+  'arcfour256',
+  'arcfour128',
+
+  'cast128-cbc',
+  'arcfour',
+].filter(canUseCipher));
+
+
+const canUseMAC = (() => {
+  const hashes = crypto.getHashes();
+  return (name) => hashes.includes(MAC_INFO[name].sslName);
+})();
+const DEFAULT_MAC = [
+  'hmac-sha2-256-etm@openssh.com',
+  'hmac-sha2-512-etm@openssh.com',
+  'hmac-sha1-etm@openssh.com',
+  'hmac-sha2-256',
+  'hmac-sha2-512',
+  'hmac-sha1',
+].filter(canUseMAC);
+const SUPPORTED_MAC = DEFAULT_MAC.concat([
+  'hmac-md5',
+  'hmac-sha2-256-96', // first 96 bits of HMAC-SHA256
+  'hmac-sha2-512-96', // first 96 bits of HMAC-SHA512
+  'hmac-ripemd160',
+  'hmac-sha1-96',     // first 96 bits of HMAC-SHA1
+  'hmac-md5-96',      // first 96 bits of HMAC-MD5
+].filter(canUseMAC));
+
+const DEFAULT_COMPRESSION = [
+  'none',
+  'zlib@openssh.com', // ZLIB (LZ77) compression, except
+                      // compression/decompression does not start until after
+                      // successful user authentication
+  'zlib',             // ZLIB (LZ77) compression
+];
+const SUPPORTED_COMPRESSION = DEFAULT_COMPRESSION.concat([
+]);
+
+
+const COMPAT = {
+  BAD_DHGEX: 1 << 0,
+  OLD_EXIT: 1 << 1,
+  DYN_RPORT_BUG: 1 << 2,
+  BUG_DHGEX_LARGE: 1 << 3,
+  IMPLY_RSA_SHA2_SIGALGS: 1 << 4,
+};
+
+module.exports = {
+  MESSAGE: {
+    // Transport layer protocol -- generic (1-19)
+    DISCONNECT: 1,
+    IGNORE: 2,
+    UNIMPLEMENTED: 3,
+    DEBUG: 4,
+    SERVICE_REQUEST: 5,
+    SERVICE_ACCEPT: 6,
+    EXT_INFO: 7, // RFC 8308
+
+    // Transport layer protocol -- algorithm negotiation (20-29)
+    KEXINIT: 20,
+    NEWKEYS: 21,
+
+    // Transport layer protocol -- key exchange method-specific (30-49)
+    KEXDH_INIT: 30,
+    KEXDH_REPLY: 31,
+
+    KEXDH_GEX_GROUP: 31,
+    KEXDH_GEX_INIT: 32,
+    KEXDH_GEX_REPLY: 33,
+    KEXDH_GEX_REQUEST: 34,
+
+    KEXECDH_INIT: 30,
+    KEXECDH_REPLY: 31,
+
+    // User auth protocol -- generic (50-59)
+    USERAUTH_REQUEST: 50,
+    USERAUTH_FAILURE: 51,
+    USERAUTH_SUCCESS: 52,
+    USERAUTH_BANNER: 53,
+
+    // User auth protocol -- user auth method-specific (60-79)
+    USERAUTH_PASSWD_CHANGEREQ: 60,
+
+    USERAUTH_PK_OK: 60,
+
+    USERAUTH_INFO_REQUEST: 60,
+    USERAUTH_INFO_RESPONSE: 61,
+
+    // Connection protocol -- generic (80-89)
+    GLOBAL_REQUEST: 80,
+    REQUEST_SUCCESS: 81,
+    REQUEST_FAILURE: 82,
+
+    // Connection protocol -- channel-related (90-127)
+    CHANNEL_OPEN: 90,
+    CHANNEL_OPEN_CONFIRMATION: 91,
+    CHANNEL_OPEN_FAILURE: 92,
+    CHANNEL_WINDOW_ADJUST: 93,
+    CHANNEL_DATA: 94,
+    CHANNEL_EXTENDED_DATA: 95,
+    CHANNEL_EOF: 96,
+    CHANNEL_CLOSE: 97,
+    CHANNEL_REQUEST: 98,
+    CHANNEL_SUCCESS: 99,
+    CHANNEL_FAILURE: 100
+
+    // Reserved for client protocols (128-191)
+
+    // Local extensions (192-155)
+  },
+  DISCONNECT_REASON: {
+    HOST_NOT_ALLOWED_TO_CONNECT: 1,
+    PROTOCOL_ERROR: 2,
+    KEY_EXCHANGE_FAILED: 3,
+    RESERVED: 4,
+    MAC_ERROR: 5,
+    COMPRESSION_ERROR: 6,
+    SERVICE_NOT_AVAILABLE: 7,
+    PROTOCOL_VERSION_NOT_SUPPORTED: 8,
+    HOST_KEY_NOT_VERIFIABLE: 9,
+    CONNECTION_LOST: 10,
+    BY_APPLICATION: 11,
+    TOO_MANY_CONNECTIONS: 12,
+    AUTH_CANCELED_BY_USER: 13,
+    NO_MORE_AUTH_METHODS_AVAILABLE: 14,
+    ILLEGAL_USER_NAME: 15,
+  },
+  DISCONNECT_REASON_STR: undefined,
+  CHANNEL_OPEN_FAILURE: {
+    ADMINISTRATIVELY_PROHIBITED: 1,
+    CONNECT_FAILED: 2,
+    UNKNOWN_CHANNEL_TYPE: 3,
+    RESOURCE_SHORTAGE: 4
+  },
+  TERMINAL_MODE: {
+    TTY_OP_END: 0,        // Indicates end of options.
+    VINTR: 1,             // Interrupt character; 255 if none. Similarly for the
+                          //  other characters.  Not all of these characters are
+                          //  supported on all systems.
+    VQUIT: 2,             // The quit character (sends SIGQUIT signal on POSIX
+                          //  systems).
+    VERASE: 3,            // Erase the character to left of the cursor.
+    VKILL: 4,             // Kill the current input line.
+    VEOF: 5,              // End-of-file character (sends EOF from the
+                          //  terminal).
+    VEOL: 6,              // End-of-line character in addition to carriage
+                          //  return and/or linefeed.
+    VEOL2: 7,             // Additional end-of-line character.
+    VSTART: 8,            // Continues paused output (normally control-Q).
+    VSTOP: 9,             // Pauses output (normally control-S).
+    VSUSP: 10,            // Suspends the current program.
+    VDSUSP: 11,           // Another suspend character.
+    VREPRINT: 12,         // Reprints the current input line.
+    VWERASE: 13,          // Erases a word left of cursor.
+    VLNEXT: 14,           // Enter the next character typed literally, even if
+                          //  it is a special character
+    VFLUSH: 15,           // Character to flush output.
+    VSWTCH: 16,           // Switch to a different shell layer.
+    VSTATUS: 17,          // Prints system status line (load, command, pid,
+                          //  etc).
+    VDISCARD: 18,         // Toggles the flushing of terminal output.
+    IGNPAR: 30,           // The ignore parity flag.  The parameter SHOULD be 0
+                          //  if this flag is FALSE, and 1 if it is TRUE.
+    PARMRK: 31,           // Mark parity and framing errors.
+    INPCK: 32,            // Enable checking of parity errors.
+    ISTRIP: 33,           // Strip 8th bit off characters.
+    INLCR: 34,            // Map NL into CR on input.
+    IGNCR: 35,            // Ignore CR on input.
+    ICRNL: 36,            // Map CR to NL on input.
+    IUCLC: 37,            // Translate uppercase characters to lowercase.
+    IXON: 38,             // Enable output flow control.
+    IXANY: 39,            // Any char will restart after stop.
+    IXOFF: 40,            // Enable input flow control.
+    IMAXBEL: 41,          // Ring bell on input queue full.
+    ISIG: 50,             // Enable signals INTR, QUIT, [D]SUSP.
+    ICANON: 51,           // Canonicalize input lines.
+    XCASE: 52,            // Enable input and output of uppercase characters by
+                          //  preceding their lowercase equivalents with "\".
+    ECHO: 53,             // Enable echoing.
+    ECHOE: 54,            // Visually erase chars.
+    ECHOK: 55,            // Kill character discards current line.
+    ECHONL: 56,           // Echo NL even if ECHO is off.
+    NOFLSH: 57,           // Don't flush after interrupt.
+    TOSTOP: 58,           // Stop background jobs from output.
+    IEXTEN: 59,           // Enable extensions.
+    ECHOCTL: 60,          // Echo control characters as ^(Char).
+    ECHOKE: 61,           // Visual erase for line kill.
+    PENDIN: 62,           // Retype pending input.
+    OPOST: 70,            // Enable output processing.
+    OLCUC: 71,            // Convert lowercase to uppercase.
+    ONLCR: 72,            // Map NL to CR-NL.
+    OCRNL: 73,            // Translate carriage return to newline (output).
+    ONOCR: 74,            // Translate newline to carriage return-newline
+                          //  (output).
+    ONLRET: 75,           // Newline performs a carriage return (output).
+    CS7: 90,              // 7 bit mode.
+    CS8: 91,              // 8 bit mode.
+    PARENB: 92,           // Parity enable.
+    PARODD: 93,           // Odd parity, else even.
+    TTY_OP_ISPEED: 128,   // Specifies the input baud rate in bits per second.
+    TTY_OP_OSPEED: 129,   // Specifies the output baud rate in bits per second.
+  },
+  CHANNEL_EXTENDED_DATATYPE: {
+    STDERR: 1,
+  },
+
+  SIGNALS: [
+    'ABRT', 'ALRM', 'FPE', 'HUP', 'ILL', 'INT', 'QUIT', 'SEGV', 'TERM', 'USR1',
+    'USR2', 'KILL', 'PIPE'
+  ].reduce((cur, val) => ({ ...cur, [val]: 1 }), {}),
+
+  COMPAT,
+  COMPAT_CHECKS: [
+    [ 'Cisco-1.25', COMPAT.BAD_DHGEX ],
+    [ /^Cisco-1[.]/, COMPAT.BUG_DHGEX_LARGE ],
+    [ /^[0-9.]+$/, COMPAT.OLD_EXIT ], // old SSH.com implementations
+    [ /^OpenSSH_5[.][0-9]+/, COMPAT.DYN_RPORT_BUG ],
+    [ /^OpenSSH_7[.]4/, COMPAT.IMPLY_RSA_SHA2_SIGALGS ],
+  ],
+
+  // KEX proposal-related
+  DEFAULT_KEX,
+  SUPPORTED_KEX,
+  DEFAULT_SERVER_HOST_KEY,
+  SUPPORTED_SERVER_HOST_KEY,
+  DEFAULT_CIPHER,
+  SUPPORTED_CIPHER,
+  DEFAULT_MAC,
+  SUPPORTED_MAC,
+  DEFAULT_COMPRESSION,
+  SUPPORTED_COMPRESSION,
+
+  curve25519Supported,
+  eddsaSupported,
+};
+
+module.exports.DISCONNECT_REASON_BY_VALUE =
+  Array.from(Object.entries(module.exports.DISCONNECT_REASON))
+       .reduce((obj, [key, value]) => ({ ...obj, [value]: key }), {});
@@ -0,0 +1,23 @@
+{
+  'variables': {
+    'real_openssl_major%': '0',
+  },
+  'targets': [
+    {
+      'target_name': 'sshcrypto',
+      'include_dirs': [
+        "<!(node -e \"require('nan')\")",
+      ],
+      'sources': [
+        'src/binding.cc'
+      ],
+      'cflags': [ '-O3' ],
+
+      # Needed for OpenSSL 3.x/node.js v17.x+
+      'defines': [
+        'OPENSSL_API_COMPAT=0x10100000L',
+        'REAL_OPENSSL_MAJOR=<(real_openssl_major)',
+      ],
+    },
+  ],
+}
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+  <ProjectOutputs>
+    <ProjectOutput>
+      <FullPath>C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\Release\sshcrypto.node</FullPath>
+    </ProjectOutput>
+  </ProjectOutputs>
+  <ContentFiles />
+  <SatelliteDlls />
+  <NonRecipeFileRefs />
+</Project>
@@ -0,0 +1,2 @@
+C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\src\binding.cc;C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\Release\obj\sshcrypto\src\binding.obj
+C:\Users\dimir\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\src\win_delay_load_hook.cc;C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\Release\obj\sshcrypto\win_delay_load_hook.obj
@@ -0,0 +1,5 @@
+^C:\USERS\DIMIR\SSH-UPDATER\NODE_MODULES\SSH2\LIB\PROTOCOL\CRYPTO\BUILD\RELEASE\OBJ\SSHCRYPTO\SRC\BINDING.OBJ|C:\USERS\DIMIR\SSH-UPDATER\NODE_MODULES\SSH2\LIB\PROTOCOL\CRYPTO\BUILD\RELEASE\OBJ\SSHCRYPTO\WIN_DELAY_LOAD_HOOK.OBJ
+C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\Release\sshcrypto.LIB
+C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\Release\sshcrypto.EXP
+C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\Release\sshcrypto.IPDB
+C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\Release\sshcrypto.IOBJ
@@ -0,0 +1,2 @@
+PlatformToolSet=v143:VCToolArchitecture=Native64Bit:VCToolsVersion=14.44.35207:TargetPlatformVersion=10.0.26100.0:
+Release|x64|C:\Users\dimir\ssh-updater\node_modules\ssh2\lib\protocol\crypto\build\|
@@ -0,0 +1,19 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2015
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "sshcrypto", "sshcrypto.vcxproj", "{529648C8-47C1-F1B5-2925-8170DD79C9A4}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Release|x64 = Release|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{529648C8-47C1-F1B5-2925-8170DD79C9A4}.Debug|x64.ActiveCfg = Debug|x64
+		{529648C8-47C1-F1B5-2925-8170DD79C9A4}.Debug|x64.Build.0 = Debug|x64
+		{529648C8-47C1-F1B5-2925-8170DD79C9A4}.Release|x64.ActiveCfg = Release|x64
+		{529648C8-47C1-F1B5-2925-8170DD79C9A4}.Release|x64.Build.0 = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
@@ -0,0 +1,528 @@
+# Do not edit. File was generated by node-gyp's "configure" step
+{
+  "target_defaults": {
+    "cflags": [],
+    "configurations": {
+      "Debug": {
+        "v8_enable_v8_checks": 0,
+        "variables": {}
+      },
+      "Release": {
+        "v8_enable_v8_checks": 1,
+        "variables": {}
+      }
+    },
+    "default_configuration": "Release",
+    "defines": [],
+    "include_dirs": [],
+    "libraries": [],
+    "msbuild_toolset": "v143",
+    "msvs_windows_target_platform_version": "10.0.26100.0"
+  },
+  "variables": {
+    "asan": 0,
+    "clang": 0,
+    "control_flow_guard": "false",
+    "coverage": "false",
+    "dcheck_always_on": 0,
+    "debug_nghttp2": "false",
+    "debug_node": "false",
+    "enable_lto": "false",
+    "enable_pgo_generate": "false",
+    "enable_pgo_use": "false",
+    "error_on_warn": "false",
+    "force_dynamic_crt": 0,
+    "host_arch": "x64",
+    "icu_data_in": "..\\..\\deps\\icu-tmp\\icudt77l.dat",
+    "icu_endianness": "l",
+    "icu_gyp_path": "tools/icu/icu-generic.gyp",
+    "icu_path": "deps/icu-small",
+    "icu_small": "false",
+    "icu_ver_major": "77",
+    "libdir": "lib",
+    "llvm_version": "19.1.5",
+    "napi_build_version": "10",
+    "nasm_version": "3.01",
+    "node_builtin_shareable_builtins": [
+      "deps/cjs-module-lexer/lexer.js",
+      "deps/cjs-module-lexer/dist/lexer.js",
+      "deps/undici/undici.js",
+      "deps/amaro/dist/index.js"
+    ],
+    "node_byteorder": "little",
+    "node_cctest_sources": [
+      "src/node_snapshot_stub.cc",
+      "test/cctest/inspector/test_network_requests_buffer.cc",
+      "test/cctest/inspector/test_node_protocol.cc",
+      "test/cctest/node_test_fixture.cc",
+      "test/cctest/test_aliased_buffer.cc",
+      "test/cctest/test_base64.cc",
+      "test/cctest/test_base_object_ptr.cc",
+      "test/cctest/test_cppgc.cc",
+      "test/cctest/test_crypto_clienthello.cc",
+      "test/cctest/test_dataqueue.cc",
+      "test/cctest/test_environment.cc",
+      "test/cctest/test_inspector_socket.cc",
+      "test/cctest/test_inspector_socket_server.cc",
+      "test/cctest/test_json_utils.cc",
+      "test/cctest/test_linked_binding.cc",
+      "test/cctest/test_lru_cache.cc",
+      "test/cctest/test_node_api.cc",
+      "test/cctest/test_node_crypto.cc",
+      "test/cctest/test_node_crypto_env.cc",
+      "test/cctest/test_node_postmortem_metadata.cc",
+      "test/cctest/test_node_task_runner.cc",
+      "test/cctest/test_path.cc",
+      "test/cctest/test_per_process.cc",
+      "test/cctest/test_platform.cc",
+      "test/cctest/test_quic_cid.cc",
+      "test/cctest/test_quic_error.cc",
+      "test/cctest/test_quic_tokens.cc",
+      "test/cctest/test_report.cc",
+      "test/cctest/test_sockaddr.cc",
+      "test/cctest/test_string_bytes.cc",
+      "test/cctest/test_traced_value.cc",
+      "test/cctest/test_util.cc",
+      "test/cctest/node_test_fixture.h"
+    ],
+    "node_debug_lib": "false",
+    "node_enable_d8": "false",
+    "node_enable_v8_vtunejit": "false",
+    "node_enable_v8windbg": "false",
+    "node_fipsinstall": "false",
+    "node_install_corepack": "true",
+    "node_install_npm": "true",
+    "node_library_files": [
+      "lib/_http_agent.js",
+      "lib/_http_client.js",
+      "lib/_http_common.js",
+      "lib/_http_incoming.js",
+      "lib/_http_outgoing.js",
+      "lib/_http_server.js",
+      "lib/_stream_duplex.js",
+      "lib/_stream_passthrough.js",
+      "lib/_stream_readable.js",
+      "lib/_stream_transform.js",
+      "lib/_stream_wrap.js",
+      "lib/_stream_writable.js",
+      "lib/_tls_common.js",
+      "lib/_tls_wrap.js",
+      "lib/assert.js",
+      "lib/assert/strict.js",
+      "lib/async_hooks.js",
+      "lib/buffer.js",
+      "lib/child_process.js",
+      "lib/cluster.js",
+      "lib/console.js",
+      "lib/constants.js",
+      "lib/crypto.js",
+      "lib/dgram.js",
+      "lib/diagnostics_channel.js",
+      "lib/dns.js",
+      "lib/dns/promises.js",
+      "lib/domain.js",
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+      <PreprocessorDefinitions>NODE_GYP_MODULE_NAME=sshcrypto;USING_UV_SHARED=1;USING_V8_SHARED=1;V8_DEPRECATION_WARNINGS=1;_GLIBCXX_USE_CXX11_ABI=1;_FILE_OFFSET_BITS=64;WIN32;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;_HAS_EXCEPTIONS=0;NOMINMAX;OPENSSL_NO_PINSHARED;OPENSSL_THREADS;OPENSSL_API_COMPAT=0x10100000L;REAL_OPENSSL_MAJOR=3;BUILDING_NODE_EXTENSION;HOST_BINARY=&quot;node.exe&quot;;DEBUG;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <StringPooling>true</StringPooling>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <WarningLevel>Level3</WarningLevel>
+      <WholeProgramOptimization>true</WholeProgramOptimization>
+    </ClCompile>
+    <Lib>
+      <AdditionalOptions>/LTCG:INCREMENTAL %(AdditionalOptions)</AdditionalOptions>
+    </Lib>
+    <Link>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;delayimp.lib;&quot;C:\\Users\\dimir\\AppData\\Local\\node-gyp\\Cache\\24.11.1\\x64\\node.lib&quot;</AdditionalDependencies>
+      <AdditionalOptions>/LTCG:INCREMENTAL /ignore:4199 %(AdditionalOptions)</AdditionalOptions>
+      <DelayLoadDLLs>node.exe;%(DelayLoadDLLs)</DelayLoadDLLs>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <OptimizeReferences>true</OptimizeReferences>
+      <OutputFile>$(OutDir)$(ProjectName).node</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <TargetExt>.node</TargetExt>
+      <TargetMachine>MachineX64</TargetMachine>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\include\node;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\src;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\openssl\config;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\openssl\openssl\include;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\uv\include;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\zlib;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\v8\include;..\..\..\..\..\nan;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>NODE_GYP_MODULE_NAME=sshcrypto;USING_UV_SHARED=1;USING_V8_SHARED=1;V8_DEPRECATION_WARNINGS=1;_GLIBCXX_USE_CXX11_ABI=1;_FILE_OFFSET_BITS=64;WIN32;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;_HAS_EXCEPTIONS=0;NOMINMAX;OPENSSL_NO_PINSHARED;OPENSSL_THREADS;OPENSSL_API_COMPAT=0x10100000L;REAL_OPENSSL_MAJOR=3;BUILDING_NODE_EXTENSION;HOST_BINARY=&quot;node.exe&quot;;DEBUG;_DEBUG;%(PreprocessorDefinitions);%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <AdditionalIncludeDirectories>C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\include\node;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\src;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\openssl\config;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\openssl\openssl\include;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\uv\include;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\zlib;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\v8\include;..\..\..\..\..\nan;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalOptions>/Zc:__cplusplus -std:c++20 /Zm2000 %(AdditionalOptions)</AdditionalOptions>
+      <BufferSecurityCheck>true</BufferSecurityCheck>
+      <DebugInformationFormat>OldStyle</DebugInformationFormat>
+      <DisableSpecificWarnings>4351;4355;4800;4251;4275;4244;4267;%(DisableSpecificWarnings)</DisableSpecificWarnings>
+      <ExceptionHandling>false</ExceptionHandling>
+      <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <MultiProcessorCompilation>true</MultiProcessorCompilation>
+      <OmitFramePointers>true</OmitFramePointers>
+      <Optimization>Full</Optimization>
+      <PrecompiledHeader>NotUsing</PrecompiledHeader>
+      <PreprocessorDefinitions>NODE_GYP_MODULE_NAME=sshcrypto;USING_UV_SHARED=1;USING_V8_SHARED=1;V8_DEPRECATION_WARNINGS=1;_GLIBCXX_USE_CXX11_ABI=1;_FILE_OFFSET_BITS=64;WIN32;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;_HAS_EXCEPTIONS=0;NOMINMAX;OPENSSL_NO_PINSHARED;OPENSSL_THREADS;OPENSSL_API_COMPAT=0x10100000L;REAL_OPENSSL_MAJOR=3;BUILDING_NODE_EXTENSION;HOST_BINARY=&quot;node.exe&quot;;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <RuntimeTypeInfo>false</RuntimeTypeInfo>
+      <StringPooling>true</StringPooling>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <TreatWarningAsError>false</TreatWarningAsError>
+      <WarningLevel>Level3</WarningLevel>
+      <WholeProgramOptimization>true</WholeProgramOptimization>
+    </ClCompile>
+    <Lib>
+      <AdditionalOptions>/LTCG:INCREMENTAL %(AdditionalOptions)</AdditionalOptions>
+    </Lib>
+    <Link>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;delayimp.lib;&quot;C:\\Users\\dimir\\AppData\\Local\\node-gyp\\Cache\\24.11.1\\x64\\node.lib&quot;</AdditionalDependencies>
+      <AdditionalOptions>/LTCG:INCREMENTAL /ignore:4199 %(AdditionalOptions)</AdditionalOptions>
+      <DelayLoadDLLs>node.exe;%(DelayLoadDLLs)</DelayLoadDLLs>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <OptimizeReferences>true</OptimizeReferences>
+      <OutputFile>$(OutDir)$(ProjectName).node</OutputFile>
+      <SuppressStartupBanner>true</SuppressStartupBanner>
+      <TargetExt>.node</TargetExt>
+      <TargetMachine>MachineX64</TargetMachine>
+    </Link>
+    <ResourceCompile>
+      <AdditionalIncludeDirectories>C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\include\node;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\src;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\openssl\config;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\openssl\openssl\include;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\uv\include;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\zlib;C:\Users\dimir\AppData\Local\node-gyp\Cache\24.11.1\deps\v8\include;..\..\..\..\..\nan;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>NODE_GYP_MODULE_NAME=sshcrypto;USING_UV_SHARED=1;USING_V8_SHARED=1;V8_DEPRECATION_WARNINGS=1;_GLIBCXX_USE_CXX11_ABI=1;_FILE_OFFSET_BITS=64;WIN32;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;_HAS_EXCEPTIONS=0;NOMINMAX;OPENSSL_NO_PINSHARED;OPENSSL_THREADS;OPENSSL_API_COMPAT=0x10100000L;REAL_OPENSSL_MAJOR=3;BUILDING_NODE_EXTENSION;HOST_BINARY=&quot;node.exe&quot;;%(PreprocessorDefinitions);%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ResourceCompile>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <None Include="..\binding.gyp"/>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\src\binding.cc">
+      <ObjectFileName>$(IntDir)\src\binding.obj</ObjectFileName>
+    </ClCompile>
+    <ClCompile Include="C:\Users\dimir\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\src\win_delay_load_hook.cc"/>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets"/>
+  <Import Project="$(VCTargetsPath)\BuildCustomizations\masm.targets"/>
+  <ImportGroup Label="ExtensionTargets"/>
+</Project>
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="..">
+      <UniqueIdentifier>{13ED4249-1F9C-5F0F-2651-29A73F3A7059}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="..\src">
+      <UniqueIdentifier>{F1003AD6-4B6D-45DF-3F56-5CAC869BF55E}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:">
+      <UniqueIdentifier>{F87FD356-0FEB-9BC5-D1FA-368C81420008}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users">
+      <UniqueIdentifier>{707347A1-1ABA-A9B2-9AF4-DE122F5D7F08}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir">
+      <UniqueIdentifier>{9110070F-34CE-9DE2-A12E-05D95C34015C}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData">
+      <UniqueIdentifier>{DABCEBCE-33D1-4D68-EC67-0BC19A2A0901}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData\Roaming">
+      <UniqueIdentifier>{06897101-0A2C-F34A-36C2-4D0BE8BF5EB9}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData\Roaming\npm">
+      <UniqueIdentifier>{E6F3EBE6-A3A6-AA7E-34C1-5CE4364854E4}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData\Roaming\npm\node_modules">
+      <UniqueIdentifier>{126A39EA-1D28-5689-C126-0DA0AB5837A0}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData\Roaming\npm\node_modules\npm">
+      <UniqueIdentifier>{E6F3EBE6-A3A6-AA7E-34C1-5CE4364854E4}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData\Roaming\npm\node_modules\npm\node_modules">
+      <UniqueIdentifier>{126A39EA-1D28-5689-C126-0DA0AB5837A0}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp">
+      <UniqueIdentifier>{49558BB4-6D34-CA91-A65D-85A65792DC11}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="C:\Users\dimir\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\src">
+      <UniqueIdentifier>{F1003AD6-4B6D-45DF-3F56-5CAC869BF55E}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="..">
+      <UniqueIdentifier>{13ED4249-1F9C-5F0F-2651-29A73F3A7059}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="..\src\binding.cc">
+      <Filter>..\src</Filter>
+    </ClCompile>
+    <ClCompile Include="C:\Users\dimir\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\src\win_delay_load_hook.cc">
+      <Filter>C:\Users\dimir\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\src</Filter>
+    </ClCompile>
+    <None Include="..\binding.gyp">
+      <Filter>..</Filter>
+    </None>
+  </ItemGroup>
+</Project>
@@ -0,0 +1,16 @@
+'use strict';
+
+const MESSAGE_HANDLERS = new Array(256);
+[
+  require('./kex.js').HANDLERS,
+  require('./handlers.misc.js'),
+].forEach((handlers) => {
+  // eslint-disable-next-line prefer-const
+  for (let [type, handler] of Object.entries(handlers)) {
+    type = +type;
+    if (isFinite(type) && type >= 0 && type < MESSAGE_HANDLERS.length)
+      MESSAGE_HANDLERS[type] = handler;
+  }
+});
+
+module.exports = MESSAGE_HANDLERS;
@@ -0,0 +1,115 @@
+'use strict';
+
+const assert = require('assert');
+const { inspect } = require('util');
+
+// Only use this for integers! Decimal numbers do not work with this function.
+function addNumericalSeparator(val) {
+  let res = '';
+  let i = val.length;
+  const start = val[0] === '-' ? 1 : 0;
+  for (; i >= start + 4; i -= 3)
+    res = `_${val.slice(i - 3, i)}${res}`;
+  return `${val.slice(0, i)}${res}`;
+}
+
+function oneOf(expected, thing) {
+  assert(typeof thing === 'string', '`thing` has to be of type string');
+  if (Array.isArray(expected)) {
+    const len = expected.length;
+    assert(len > 0, 'At least one expected value needs to be specified');
+    expected = expected.map((i) => String(i));
+    if (len > 2) {
+      return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or `
+              + expected[len - 1];
+    } else if (len === 2) {
+      return `one of ${thing} ${expected[0]} or ${expected[1]}`;
+    }
+    return `of ${thing} ${expected[0]}`;
+  }
+  return `of ${thing} ${String(expected)}`;
+}
+
+
+exports.ERR_INTERNAL_ASSERTION = class ERR_INTERNAL_ASSERTION extends Error {
+  constructor(message) {
+    super();
+    Error.captureStackTrace(this, ERR_INTERNAL_ASSERTION);
+
+    const suffix = 'This is caused by either a bug in ssh2 '
+                   + 'or incorrect usage of ssh2 internals.\n'
+                   + 'Please open an issue with this stack trace at '
+                   + 'https://github.com/mscdex/ssh2/issues\n';
+
+    this.message = (message === undefined ? suffix : `${message}\n${suffix}`);
+  }
+};
+
+const MAX_32BIT_INT = 2 ** 32;
+const MAX_32BIT_BIGINT = (() => {
+  try {
+    return new Function('return 2n ** 32n')();
+  } catch {}
+})();
+exports.ERR_OUT_OF_RANGE = class ERR_OUT_OF_RANGE extends RangeError {
+  constructor(str, range, input, replaceDefaultBoolean) {
+    super();
+    Error.captureStackTrace(this, ERR_OUT_OF_RANGE);
+
+    assert(range, 'Missing "range" argument');
+    let msg = (replaceDefaultBoolean
+               ? str
+               : `The value of "${str}" is out of range.`);
+    let received;
+    if (Number.isInteger(input) && Math.abs(input) > MAX_32BIT_INT) {
+      received = addNumericalSeparator(String(input));
+    } else if (typeof input === 'bigint') {
+      received = String(input);
+      if (input > MAX_32BIT_BIGINT || input < -MAX_32BIT_BIGINT)
+        received = addNumericalSeparator(received);
+      received += 'n';
+    } else {
+      received = inspect(input);
+    }
+    msg += ` It must be ${range}. Received ${received}`;
+
+    this.message = msg;
+  }
+};
+
+class ERR_INVALID_ARG_TYPE extends TypeError {
+  constructor(name, expected, actual) {
+    super();
+    Error.captureStackTrace(this, ERR_INVALID_ARG_TYPE);
+
+    assert(typeof name === 'string', `'name' must be a string`);
+
+    // determiner: 'must be' or 'must not be'
+    let determiner;
+    if (typeof expected === 'string' && expected.startsWith('not ')) {
+      determiner = 'must not be';
+      expected = expected.replace(/^not /, '');
+    } else {
+      determiner = 'must be';
+    }
+
+    let msg;
+    if (name.endsWith(' argument')) {
+      // For cases like 'first argument'
+      msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
+    } else {
+      const type = (name.includes('.') ? 'property' : 'argument');
+      msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
+    }
+
+    msg += `. Received type ${typeof actual}`;
+
+    this.message = msg;
+  }
+}
+exports.ERR_INVALID_ARG_TYPE = ERR_INVALID_ARG_TYPE;
+
+exports.validateNumber = function validateNumber(value, name) {
+  if (typeof value !== 'number')
+    throw new ERR_INVALID_ARG_TYPE(name, 'number', value);
+};
@@ -0,0 +1,356 @@
+'use strict';
+
+const Ber = require('asn1').Ber;
+
+let DISCONNECT_REASON;
+
+const FastBuffer = Buffer[Symbol.species];
+const TypedArrayFill = Object.getPrototypeOf(Uint8Array.prototype).fill;
+
+function readUInt32BE(buf, offset) {
+  return (buf[offset++] * 16777216)
+         + (buf[offset++] * 65536)
+         + (buf[offset++] * 256)
+         + buf[offset];
+}
+
+function bufferCopy(src, dest, srcStart, srcEnd, destStart) {
+  if (!destStart)
+    destStart = 0;
+  if (srcEnd > src.length)
+    srcEnd = src.length;
+  let nb = srcEnd - srcStart;
+  const destLeft = (dest.length - destStart);
+  if (nb > destLeft)
+    nb = destLeft;
+  dest.set(new Uint8Array(src.buffer, src.byteOffset + srcStart, nb),
+           destStart);
+  return nb;
+}
+
+function bufferSlice(buf, start, end) {
+  if (end === undefined)
+    end = buf.length;
+  return new FastBuffer(buf.buffer, buf.byteOffset + start, end - start);
+}
+
+function makeBufferParser() {
+  let pos = 0;
+  let buffer;
+
+  const self = {
+    init: (buf, start) => {
+      buffer = buf;
+      pos = (typeof start === 'number' ? start : 0);
+    },
+    pos: () => pos,
+    length: () => (buffer ? buffer.length : 0),
+    avail: () => (buffer && pos < buffer.length ? buffer.length - pos : 0),
+    clear: () => {
+      buffer = undefined;
+    },
+    readUInt32BE: () => {
+      if (!buffer || pos + 3 >= buffer.length)
+        return;
+      return (buffer[pos++] * 16777216)
+             + (buffer[pos++] * 65536)
+             + (buffer[pos++] * 256)
+             + buffer[pos++];
+    },
+    readUInt64BE: (behavior) => {
+      if (!buffer || pos + 7 >= buffer.length)
+        return;
+      switch (behavior) {
+        case 'always':
+          return BigInt(`0x${buffer.hexSlice(pos, pos += 8)}`);
+        case 'maybe':
+          if (buffer[pos] > 0x1F)
+            return BigInt(`0x${buffer.hexSlice(pos, pos += 8)}`);
+          // FALLTHROUGH
+        default:
+          return (buffer[pos++] * 72057594037927940)
+                 + (buffer[pos++] * 281474976710656)
+                 + (buffer[pos++] * 1099511627776)
+                 + (buffer[pos++] * 4294967296)
+                 + (buffer[pos++] * 16777216)
+                 + (buffer[pos++] * 65536)
+                 + (buffer[pos++] * 256)
+                 + buffer[pos++];
+      }
+    },
+    skip: (n) => {
+      if (buffer && n > 0)
+        pos += n;
+    },
+    skipString: () => {
+      const len = self.readUInt32BE();
+      if (len === undefined)
+        return;
+      pos += len;
+      return (pos <= buffer.length ? len : undefined);
+    },
+    readByte: () => {
+      if (buffer && pos < buffer.length)
+        return buffer[pos++];
+    },
+    readBool: () => {
+      if (buffer && pos < buffer.length)
+        return !!buffer[pos++];
+    },
+    readList: () => {
+      const list = self.readString(true);
+      if (list === undefined)
+        return;
+      return (list ? list.split(',') : []);
+    },
+    readString: (dest, maxLen) => {
+      if (typeof dest === 'number') {
+        maxLen = dest;
+        dest = undefined;
+      }
+
+      const len = self.readUInt32BE();
+      if (len === undefined)
+        return;
+
+      if ((buffer.length - pos) < len
+          || (typeof maxLen === 'number' && len > maxLen)) {
+        return;
+      }
+
+      if (dest) {
+        if (Buffer.isBuffer(dest))
+          return bufferCopy(buffer, dest, pos, pos += len);
+        return buffer.utf8Slice(pos, pos += len);
+      }
+      return bufferSlice(buffer, pos, pos += len);
+    },
+    readRaw: (len) => {
+      if (!buffer)
+        return;
+      if (typeof len !== 'number')
+        return bufferSlice(buffer, pos, pos += (buffer.length - pos));
+      if ((buffer.length - pos) >= len)
+        return bufferSlice(buffer, pos, pos += len);
+    },
+  };
+
+  return self;
+}
+
+function makeError(msg, level, fatal) {
+  const err = new Error(msg);
+  if (typeof level === 'boolean') {
+    fatal = level;
+    err.level = 'protocol';
+  } else {
+    err.level = level || 'protocol';
+  }
+  err.fatal = !!fatal;
+  return err;
+}
+
+function writeUInt32BE(buf, value, offset) {
+  buf[offset++] = (value >>> 24);
+  buf[offset++] = (value >>> 16);
+  buf[offset++] = (value >>> 8);
+  buf[offset++] = value;
+  return offset;
+}
+
+const utilBufferParser = makeBufferParser();
+
+module.exports = {
+  bufferCopy,
+  bufferSlice,
+  FastBuffer,
+  bufferFill: (buf, value, start, end) => {
+    return TypedArrayFill.call(buf, value, start, end);
+  },
+  makeError,
+  doFatalError: (protocol, msg, level, reason) => {
+    let err;
+    if (DISCONNECT_REASON === undefined)
+      ({ DISCONNECT_REASON } = require('./constants.js'));
+    if (msg instanceof Error) {
+      // doFatalError(protocol, err[, reason])
+      err = msg;
+      if (typeof level !== 'number')
+        reason = DISCONNECT_REASON.PROTOCOL_ERROR;
+      else
+        reason = level;
+    } else {
+      // doFatalError(protocol, msg[, level[, reason]])
+      err = makeError(msg, level, true);
+    }
+    if (typeof reason !== 'number')
+      reason = DISCONNECT_REASON.PROTOCOL_ERROR;
+    protocol.disconnect(reason);
+    protocol._destruct();
+    protocol._onError(err);
+    return Infinity;
+  },
+  readUInt32BE,
+  writeUInt32BE,
+  writeUInt32LE: (buf, value, offset) => {
+    buf[offset++] = value;
+    buf[offset++] = (value >>> 8);
+    buf[offset++] = (value >>> 16);
+    buf[offset++] = (value >>> 24);
+    return offset;
+  },
+  makeBufferParser,
+  bufferParser: makeBufferParser(),
+  readString: (buffer, start, dest, maxLen) => {
+    if (typeof dest === 'number') {
+      maxLen = dest;
+      dest = undefined;
+    }
+
+    if (start === undefined)
+      start = 0;
+
+    const left = (buffer.length - start);
+    if (start < 0 || start >= buffer.length || left < 4)
+      return;
+
+    const len = readUInt32BE(buffer, start);
+    if (left < (4 + len) || (typeof maxLen === 'number' && len > maxLen))
+      return;
+
+    start += 4;
+    const end = start + len;
+    buffer._pos = end;
+
+    if (dest) {
+      if (Buffer.isBuffer(dest))
+        return bufferCopy(buffer, dest, start, end);
+      return buffer.utf8Slice(start, end);
+    }
+    return bufferSlice(buffer, start, end);
+  },
+  sigSSHToASN1: (sig, type) => {
+    switch (type) {
+      case 'ssh-dss': {
+        if (sig.length > 40)
+          return sig;
+        // Change bare signature r and s values to ASN.1 BER values for OpenSSL
+        const asnWriter = new Ber.Writer();
+        asnWriter.startSequence();
+        let r = sig.slice(0, 20);
+        let s = sig.slice(20);
+        if (r[0] & 0x80) {
+          const rNew = Buffer.allocUnsafe(21);
+          rNew[0] = 0x00;
+          r.copy(rNew, 1);
+          r = rNew;
+        } else if (r[0] === 0x00 && !(r[1] & 0x80)) {
+          r = r.slice(1);
+        }
+        if (s[0] & 0x80) {
+          const sNew = Buffer.allocUnsafe(21);
+          sNew[0] = 0x00;
+          s.copy(sNew, 1);
+          s = sNew;
+        } else if (s[0] === 0x00 && !(s[1] & 0x80)) {
+          s = s.slice(1);
+        }
+        asnWriter.writeBuffer(r, Ber.Integer);
+        asnWriter.writeBuffer(s, Ber.Integer);
+        asnWriter.endSequence();
+        return asnWriter.buffer;
+      }
+      case 'ecdsa-sha2-nistp256':
+      case 'ecdsa-sha2-nistp384':
+      case 'ecdsa-sha2-nistp521': {
+        utilBufferParser.init(sig, 0);
+        const r = utilBufferParser.readString();
+        const s = utilBufferParser.readString();
+        utilBufferParser.clear();
+        if (r === undefined || s === undefined)
+          return;
+
+        const asnWriter = new Ber.Writer();
+        asnWriter.startSequence();
+        asnWriter.writeBuffer(r, Ber.Integer);
+        asnWriter.writeBuffer(s, Ber.Integer);
+        asnWriter.endSequence();
+        return asnWriter.buffer;
+      }
+      default:
+        return sig;
+    }
+  },
+  convertSignature: (signature, keyType) => {
+    switch (keyType) {
+      case 'ssh-dss': {
+        if (signature.length <= 40)
+          return signature;
+        // This is a quick and dirty way to get from BER encoded r and s that
+        // OpenSSL gives us, to just the bare values back to back (40 bytes
+        // total) like OpenSSH (and possibly others) are expecting
+        const asnReader = new Ber.Reader(signature);
+        asnReader.readSequence();
+        let r = asnReader.readString(Ber.Integer, true);
+        let s = asnReader.readString(Ber.Integer, true);
+        let rOffset = 0;
+        let sOffset = 0;
+        if (r.length < 20) {
+          const rNew = Buffer.allocUnsafe(20);
+          rNew.set(r, 1);
+          r = rNew;
+          r[0] = 0;
+        }
+        if (s.length < 20) {
+          const sNew = Buffer.allocUnsafe(20);
+          sNew.set(s, 1);
+          s = sNew;
+          s[0] = 0;
+        }
+        if (r.length > 20 && r[0] === 0)
+          rOffset = 1;
+        if (s.length > 20 && s[0] === 0)
+          sOffset = 1;
+        const newSig =
+          Buffer.allocUnsafe((r.length - rOffset) + (s.length - sOffset));
+        bufferCopy(r, newSig, rOffset, r.length, 0);
+        bufferCopy(s, newSig, sOffset, s.length, r.length - rOffset);
+        return newSig;
+      }
+      case 'ecdsa-sha2-nistp256':
+      case 'ecdsa-sha2-nistp384':
+      case 'ecdsa-sha2-nistp521': {
+        if (signature[0] === 0)
+          return signature;
+        // Convert SSH signature parameters to ASN.1 BER values for OpenSSL
+        const asnReader = new Ber.Reader(signature);
+        asnReader.readSequence();
+        const r = asnReader.readString(Ber.Integer, true);
+        const s = asnReader.readString(Ber.Integer, true);
+        if (r === null || s === null)
+          return;
+        const newSig = Buffer.allocUnsafe(4 + r.length + 4 + s.length);
+        writeUInt32BE(newSig, r.length, 0);
+        newSig.set(r, 4);
+        writeUInt32BE(newSig, s.length, 4 + r.length);
+        newSig.set(s, 4 + 4 + r.length);
+        return newSig;
+      }
+    }
+
+    return signature;
+  },
+  sendPacket: (proto, packet, bypass) => {
+    if (!bypass && proto._kexinit !== undefined) {
+      // We're currently in the middle of a handshake
+
+      if (proto._queue === undefined)
+        proto._queue = [];
+      proto._queue.push(packet);
+      proto._debug && proto._debug('Outbound: ... packet queued');
+      return false;
+    }
+    proto._cipher.encrypt(packet);
+    return true;
+  },
+};
@@ -0,0 +1,255 @@
+'use strict';
+
+const { kMaxLength } = require('buffer');
+const {
+  createInflate,
+  constants: {
+    DEFLATE,
+    INFLATE,
+    Z_DEFAULT_CHUNK,
+    Z_DEFAULT_COMPRESSION,
+    Z_DEFAULT_MEMLEVEL,
+    Z_DEFAULT_STRATEGY,
+    Z_DEFAULT_WINDOWBITS,
+    Z_PARTIAL_FLUSH,
+  }
+} = require('zlib');
+const ZlibHandle = createInflate()._handle.constructor;
+
+function processCallback() {
+  throw new Error('Should not get here');
+}
+
+function zlibOnError(message, errno, code) {
+  const self = this._owner;
+  // There is no way to cleanly recover.
+  // Continuing only obscures problems.
+
+  const error = new Error(message);
+  error.errno = errno;
+  error.code = code;
+  self._err = error;
+}
+
+function _close(engine) {
+  // Caller may invoke .close after a zlib error (which will null _handle).
+  if (!engine._handle)
+    return;
+
+  engine._handle.close();
+  engine._handle = null;
+}
+
+class Zlib {
+  constructor(mode) {
+    const windowBits = Z_DEFAULT_WINDOWBITS;
+    const level = Z_DEFAULT_COMPRESSION;
+    const memLevel = Z_DEFAULT_MEMLEVEL;
+    const strategy = Z_DEFAULT_STRATEGY;
+    const dictionary = undefined;
+
+    this._err = undefined;
+    this._writeState = new Uint32Array(2);
+    this._chunkSize = Z_DEFAULT_CHUNK;
+    this._maxOutputLength = kMaxLength;
+    this._outBuffer = Buffer.allocUnsafe(this._chunkSize);
+    this._outOffset = 0;
+
+    this._handle = new ZlibHandle(mode);
+    this._handle._owner = this;
+    this._handle.onerror = zlibOnError;
+    this._handle.init(windowBits,
+                      level,
+                      memLevel,
+                      strategy,
+                      this._writeState,
+                      processCallback,
+                      dictionary);
+  }
+
+  writeSync(chunk, retChunks) {
+    const handle = this._handle;
+    if (!handle)
+      throw new Error('Invalid Zlib instance');
+
+    let availInBefore = chunk.length;
+    let availOutBefore = this._chunkSize - this._outOffset;
+    let inOff = 0;
+    let availOutAfter;
+    let availInAfter;
+
+    let buffers;
+    let nread = 0;
+    const state = this._writeState;
+    let buffer = this._outBuffer;
+    let offset = this._outOffset;
+    const chunkSize = this._chunkSize;
+
+    while (true) {
+      handle.writeSync(Z_PARTIAL_FLUSH,
+                       chunk, // in
+                       inOff, // in_off
+                       availInBefore, // in_len
+                       buffer, // out
+                       offset, // out_off
+                       availOutBefore); // out_len
+      if (this._err)
+        throw this._err;
+
+      availOutAfter = state[0];
+      availInAfter = state[1];
+
+      const inDelta = availInBefore - availInAfter;
+      const have = availOutBefore - availOutAfter;
+
+      if (have > 0) {
+        const out = (offset === 0 && have === buffer.length
+                     ? buffer
+                     : buffer.slice(offset, offset + have));
+        offset += have;
+        if (!buffers)
+          buffers = out;
+        else if (buffers.push === undefined)
+          buffers = [buffers, out];
+        else
+          buffers.push(out);
+        nread += out.byteLength;
+
+        if (nread > this._maxOutputLength) {
+          _close(this);
+          throw new Error(
+            `Output length exceeded maximum of ${this._maxOutputLength}`
+          );
+        }
+      } else if (have !== 0) {
+        throw new Error('have should not go down');
+      }
+
+      // Exhausted the output buffer, or used all the input create a new one.
+      if (availOutAfter === 0 || offset >= chunkSize) {
+        availOutBefore = chunkSize;
+        offset = 0;
+        buffer = Buffer.allocUnsafe(chunkSize);
+      }
+
+      if (availOutAfter === 0) {
+        // Not actually done. Need to reprocess.
+        // Also, update the availInBefore to the availInAfter value,
+        // so that if we have to hit it a third (fourth, etc.) time,
+        // it'll have the correct byte counts.
+        inOff += inDelta;
+        availInBefore = availInAfter;
+      } else {
+        break;
+      }
+    }
+
+    this._outBuffer = buffer;
+    this._outOffset = offset;
+
+    if (nread === 0)
+      buffers = Buffer.alloc(0);
+
+    if (retChunks) {
+      buffers.totalLen = nread;
+      return buffers;
+    }
+
+    if (buffers.push === undefined)
+      return buffers;
+
+    const output = Buffer.allocUnsafe(nread);
+    for (let i = 0, p = 0; i < buffers.length; ++i) {
+      const buf = buffers[i];
+      output.set(buf, p);
+      p += buf.length;
+    }
+    return output;
+  }
+}
+
+class ZlibPacketWriter {
+  constructor(protocol) {
+    this.allocStart = 0;
+    this.allocStartKEX = 0;
+    this._protocol = protocol;
+    this._zlib = new Zlib(DEFLATE);
+  }
+
+  cleanup() {
+    if (this._zlib)
+      _close(this._zlib);
+  }
+
+  alloc(payloadSize, force) {
+    return Buffer.allocUnsafe(payloadSize);
+  }
+
+  finalize(payload, force) {
+    if (this._protocol._kexinit === undefined || force) {
+      const output = this._zlib.writeSync(payload, true);
+      const packet = this._protocol._cipher.allocPacket(output.totalLen);
+      if (output.push === undefined) {
+        packet.set(output, 5);
+      } else {
+        for (let i = 0, p = 5; i < output.length; ++i) {
+          const chunk = output[i];
+          packet.set(chunk, p);
+          p += chunk.length;
+        }
+      }
+      return packet;
+    }
+    return payload;
+  }
+}
+
+class PacketWriter {
+  constructor(protocol) {
+    this.allocStart = 5;
+    this.allocStartKEX = 5;
+    this._protocol = protocol;
+  }
+
+  cleanup() {}
+
+  alloc(payloadSize, force) {
+    if (this._protocol._kexinit === undefined || force)
+      return this._protocol._cipher.allocPacket(payloadSize);
+    return Buffer.allocUnsafe(payloadSize);
+  }
+
+  finalize(packet, force) {
+    return packet;
+  }
+}
+
+class ZlibPacketReader {
+  constructor() {
+    this._zlib = new Zlib(INFLATE);
+  }
+
+  cleanup() {
+    if (this._zlib)
+      _close(this._zlib);
+  }
+
+  read(data) {
+    return this._zlib.writeSync(data, false);
+  }
+}
+
+class PacketReader {
+  cleanup() {}
+
+  read(data) {
+    return data;
+  }
+}
+
+module.exports = {
+  PacketReader,
+  PacketWriter,
+  ZlibPacketReader,
+  ZlibPacketWriter,
+};