{ "source": "doc/api/tls.markdown", "modules": [ { "textRaw": "TLS (SSL)", "name": "tls_(ssl)", "stability": 2, "stabilityText": "Stable", "desc": "

Use require('tls') to access this module.\n\n

\n

The tls module uses OpenSSL to provide Transport Layer Security and/or\nSecure Socket Layer: encrypted stream communication.\n\n

\n

TLS/SSL is a public/private key infrastructure. Each client and each\nserver must have a private key. A private key is created like this:\n\n

\n
openssl genrsa -out ryans-key.pem 2048
\n

All servers and some clients need to have a certificate. Certificates are public\nkeys signed by a Certificate Authority or self-signed. The first step to\ngetting a certificate is to create a "Certificate Signing Request" (CSR)\nfile. This is done with:\n\n

\n
openssl req -new -sha256 -key ryans-key.pem -out ryans-csr.pem
\n

To create a self-signed certificate with the CSR, do this:\n\n

\n
openssl x509 -req -in ryans-csr.pem -signkey ryans-key.pem -out ryans-cert.pem
\n

Alternatively you can send the CSR to a Certificate Authority for signing.\n\n

\n

For Perfect Forward Secrecy, it is required to generate Diffie-Hellman\nparameters:\n\n

\n
openssl dhparam -outform PEM -out dhparam.pem 2048
\n

To create .pfx or .p12, do this:\n\n

\n
openssl pkcs12 -export -in agent5-cert.pem -inkey agent5-key.pem \\\n    -certfile ca-cert.pem -out agent5.pfx
\n\n", "miscs": [ { "textRaw": "ALPN, NPN and SNI", "name": "ALPN, NPN and SNI", "type": "misc", "desc": "

ALPN (Application-Layer Protocol Negotiation Extension), NPN (Next\nProtocol Negotiation) and SNI (Server Name Indication) are TLS\nhandshake extensions allowing you:\n\n

\n\n" }, { "textRaw": "Client-initiated renegotiation attack mitigation", "name": "Client-initiated renegotiation attack mitigation", "type": "misc", "desc": "

The TLS protocol lets the client renegotiate certain aspects of the TLS session.\nUnfortunately, session renegotiation requires a disproportional amount of\nserver-side resources, which makes it a potential vector for denial-of-service\nattacks.\n\n

\n

To mitigate this, renegotiations are limited to three times every 10 minutes. An\nerror is emitted on the [tls.TLSSocket][] instance when the threshold is\nexceeded. The limits are configurable:\n\n

\n\n

Don't change the defaults unless you know what you are doing.\n\n

\n

To test your server, connect to it with openssl s_client -connect address:port\nand tap R<CR> (that's the letter R followed by a carriage return) a few\ntimes.\n\n

\n" }, { "textRaw": "Perfect Forward Secrecy", "name": "Perfect Forward Secrecy", "type": "misc", "desc": "

The term "[Forward Secrecy]" or "Perfect Forward Secrecy" describes a feature of\nkey-agreement (i.e. key-exchange) methods. Practically it means that even if the\nprivate key of a (your) server is compromised, communication can only be\ndecrypted by eavesdroppers if they manage to obtain the key-pair specifically\ngenerated for each session.\n\n

\n

This is achieved by randomly generating a key pair for key-agreement on every\nhandshake (in contrary to the same key for all sessions). Methods implementing\nthis technique, thus offering Perfect Forward Secrecy, are called "ephemeral".\n\n

\n

Currently two methods are commonly used to achieve Perfect Forward Secrecy (note\nthe character "E" appended to the traditional abbreviations):\n\n

\n\n

Ephemeral methods may have some performance drawbacks, because key generation\nis expensive.\n\n

\n" } ], "modules": [ { "textRaw": "Modifying the Default TLS Cipher suite", "name": "modifying_the_default_tls_cipher_suite", "desc": "

Node.js is built with a default suite of enabled and disabled TLS ciphers.\nCurrently, the default cipher suite is:\n\n

\n
ECDHE-RSA-AES128-GCM-SHA256:\nECDHE-ECDSA-AES128-GCM-SHA256:\nECDHE-RSA-AES256-GCM-SHA384:\nECDHE-ECDSA-AES256-GCM-SHA384:\nDHE-RSA-AES128-GCM-SHA256:\nECDHE-RSA-AES128-SHA256:\nDHE-RSA-AES128-SHA256:\nECDHE-RSA-AES256-SHA384:\nDHE-RSA-AES256-SHA384:\nECDHE-RSA-AES256-SHA256:\nDHE-RSA-AES256-SHA256:\nHIGH:\n!aNULL:\n!eNULL:\n!EXPORT:\n!DES:\n!RC4:\n!MD5:\n!PSK:\n!SRP:\n!CAMELLIA
\n

This default can be overriden entirely using the --tls-cipher-list command\nline switch. For instance, the following makes\nECDHE-RSA-AES128-GCM-SHA256:!RC4 the default TLS cipher suite:\n\n

\n
node --tls-cipher-list="ECDHE-RSA-AES128-GCM-SHA256:!RC4"
\n

Note that the default cipher suite included within Node.js has been carefully\nselected to reflect current security best practices and risk mitigation.\nChanging the default cipher suite can have a significant impact on the security\nof an application. The --tls-cipher-list switch should by used only if\nabsolutely necessary.\n\n

\n", "type": "module", "displayName": "Modifying the Default TLS Cipher suite" } ], "classes": [ { "textRaw": "Class: CryptoStream", "type": "class", "name": "CryptoStream", "stability": 0, "stabilityText": "Deprecated: Use [tls.TLSSocket][] instead.", "desc": "

This is an encrypted stream.\n\n

\n", "properties": [ { "textRaw": "cryptoStream.bytesWritten", "name": "bytesWritten", "desc": "

A proxy to the underlying socket's bytesWritten accessor, this will return\nthe total bytes written to the socket, including the TLS overhead.\n\n

\n" } ] }, { "textRaw": "Class: SecurePair", "type": "class", "name": "SecurePair", "desc": "

Returned by tls.createSecurePair.\n\n

\n", "events": [ { "textRaw": "Event: 'secure'", "type": "event", "name": "secure", "desc": "

The event is emitted from the SecurePair once the pair has successfully\nestablished a secure connection.\n\n

\n

Similarly to the checking for the server 'secureConnection' event,\npair.cleartext.authorized should be checked to confirm whether the certificate\nused properly authorized.\n\n

\n", "params": [] } ] }, { "textRaw": "Class: tls.Server", "type": "class", "name": "tls.Server", "desc": "

This class is a subclass of net.Server and has the same methods on it.\nInstead of accepting just raw TCP connections, this accepts encrypted\nconnections using TLS or SSL.\n\n

\n", "events": [ { "textRaw": "Event: 'clientError'", "type": "event", "name": "clientError", "desc": "

function (exception, tlsSocket) { }\n\n

\n

When a client connection emits an 'error' event before secure connection is\nestablished - it will be forwarded here.\n\n

\n

tlsSocket is the [tls.TLSSocket][] that the error originated from.\n\n

\n", "params": [] }, { "textRaw": "Event: 'newSession'", "type": "event", "name": "newSession", "desc": "

function (sessionId, sessionData, callback) { }\n\n

\n

Emitted on creation of TLS session. May be used to store sessions in external\nstorage. callback must be invoked eventually, otherwise no data will be\nsent or received from secure connection.\n\n

\n

NOTE: adding this event listener will have an effect only on connections\nestablished after addition of event listener.\n\n

\n", "params": [] }, { "textRaw": "Event: 'OCSPRequest'", "type": "event", "name": "OCSPRequest", "desc": "

function (certificate, issuer, callback) { }\n\n

\n

Emitted when the client sends a certificate status request. You could parse\nserver's current certificate to obtain OCSP url and certificate id, and after\nobtaining OCSP response invoke callback(null, resp), where resp is a\nBuffer instance. Both certificate and issuer are a Buffer\nDER-representations of the primary and issuer's certificates. They could be used\nto obtain OCSP certificate id and OCSP endpoint url.\n\n

\n

Alternatively, callback(null, null) could be called, meaning that there is no\nOCSP response.\n\n

\n

Calling callback(err) will result in a socket.destroy(err) call.\n\n

\n

Typical flow:\n\n

\n
    \n
  1. Client connects to server and sends 'OCSPRequest' to it (via status info\nextension in ClientHello.)
    2. \n
  2. Server receives request and invokes 'OCSPRequest' event listener if present
    3. \n
  3. Server grabs OCSP url from either certificate or issuer and performs an\n[OCSP request] to the CA
    4. \n
  4. Server receives OCSPResponse from CA and sends it back to client via\ncallback argument
    5. \n
  5. Client validates the response and either destroys socket or performs a\nhandshake.
    6. \n
\n

NOTE: issuer could be null, if the certificate is self-signed or if the issuer\nis not in the root certificates list. (You could provide an issuer via ca\noption.)\n\n

\n

NOTE: adding this event listener will have an effect only on connections\nestablished after addition of event listener.\n\n

\n

NOTE: you may want to use some npm module like [asn1.js] to parse the\ncertificates.\n\n

\n", "params": [] }, { "textRaw": "Event: 'resumeSession'", "type": "event", "name": "resumeSession", "desc": "

function (sessionId, callback) { }\n\n

\n

Emitted when client wants to resume previous TLS session. Event listener may\nperform lookup in external storage using given sessionId, and invoke\ncallback(null, sessionData) once finished. If session can't be resumed\n(i.e. doesn't exist in storage) one may call callback(null, null). Calling\ncallback(err) will terminate incoming connection and destroy socket.\n\n

\n

NOTE: adding this event listener will have an effect only on connections\nestablished after addition of event listener.\n\n

\n

Here's an example for using TLS session resumption:\n\n

\n
var tlsSessionStore = {};\nserver.on('newSession', (id, data, cb) => {\n  tlsSessionStore[id.toString('hex')] = data;\n  cb();\n});\nserver.on('resumeSession', (id, cb) => {\n  cb(null, tlsSessionStore[id.toString('hex')] || null);\n});
\n", "params": [] }, { "textRaw": "Event: 'secureConnection'", "type": "event", "name": "secureConnection", "desc": "

function (tlsSocket) {}\n\n

\n

This event is emitted after a new connection has been successfully\nhandshaked. The argument is an instance of [tls.TLSSocket][]. It has all the\ncommon stream methods and events.\n\n

\n

socket.authorized is a boolean value which indicates if the\nclient has verified by one of the supplied certificate authorities for the\nserver. If socket.authorized is false, then\nsocket.authorizationError is set to describe how authorization\nfailed. Implied but worth mentioning: depending on the settings of the TLS\nserver, you unauthorized connections may be accepted.\n\n

\n

socket.npnProtocol is a string containing the selected NPN protocol\nand socket.alpnProtocol is a string containing the selected ALPN\nprotocol, When both NPN and ALPN extensions are received, ALPN takes\nprecedence over NPN and the next protocol is selected by ALPN. When\nALPN has no selected protocol, this returns false.\n\n

\n

socket.servername is a string containing servername requested with\nSNI.\n\n

\n", "params": [] } ], "methods": [ { "textRaw": "server.addContext(hostname, context)", "type": "method", "name": "addContext", "desc": "

Add secure context that will be used if client request's SNI hostname is\nmatching passed hostname (wildcards can be used). context can contain\nkey, cert, ca and/or any other properties from tls.createSecureContext\noptions argument.\n\n

\n", "signatures": [ { "params": [ { "name": "hostname" }, { "name": "context" } ] } ] }, { "textRaw": "server.address()", "type": "method", "name": "address", "desc": "

Returns the bound address, the address family name and port of the\nserver as reported by the operating system. See [net.Server.address()][] for\nmore information.\n\n

\n", "signatures": [ { "params": [] } ] }, { "textRaw": "server.close([callback])", "type": "method", "name": "close", "desc": "

Stops the server from accepting new connections. This function is\nasynchronous, the server is finally closed when the server emits a 'close'\nevent. Optionally, you can pass a callback to listen for the 'close' event.\n\n

\n", "signatures": [ { "params": [ { "name": "callback", "optional": true } ] } ] }, { "textRaw": "server.getTicketKeys()", "type": "method", "name": "getTicketKeys", "desc": "

Returns Buffer instance holding the keys currently used for\nencryption/decryption of the [TLS Session Tickets][]\n\n

\n", "signatures": [ { "params": [] } ] }, { "textRaw": "server.listen(port[, hostname][, callback])", "type": "method", "name": "listen", "desc": "

Begin accepting connections on the specified port and hostname. If the\nhostname is omitted, the server will accept connections on any IPv6 address\n(::) when IPv6 is available, or any IPv4 address (0.0.0.0) otherwise. A\nport value of zero will assign a random port.\n\n

\n

This function is asynchronous. The last parameter callback will be called\nwhen the server has been bound.\n\n

\n

See net.Server for more information.\n\n

\n", "signatures": [ { "params": [ { "name": "port" }, { "name": "hostname", "optional": true }, { "name": "callback", "optional": true } ] } ] }, { "textRaw": "server.setTicketKeys(keys)", "type": "method", "name": "setTicketKeys", "desc": "

Updates the keys for encryption/decryption of the [TLS Session Tickets][].\n\n

\n

NOTE: the buffer should be 48 bytes long. See server ticketKeys option for\nmore information oh how it is going to be used.\n\n

\n

NOTE: the change is effective only for the future server connections. Existing\nor currently pending server connections will use previous keys.\n\n

\n", "signatures": [ { "params": [ { "name": "keys" } ] } ] } ], "properties": [ { "textRaw": "server.connections", "name": "connections", "desc": "

The number of concurrent connections on the server.\n\n

\n" }, { "textRaw": "server.maxConnections", "name": "maxConnections", "desc": "

Set this property to reject connections when the server's connection count\ngets high.\n\n\n

\n" } ] }, { "textRaw": "Class: tls.TLSSocket", "type": "class", "name": "tls.TLSSocket", "desc": "

This is a wrapped version of [net.Socket][] that does transparent encryption\nof written data and all required TLS negotiation.\n\n

\n

This instance implements a duplex [Stream][] interfaces. It has all the\ncommon stream methods and events.\n\n

\n

Methods that return TLS connection meta data (e.g. [getPeerCertificate][] will\nonly return data while the connection is open.\n\n

\n", "methods": [ { "textRaw": "new tls.TLSSocket(socket[, options])", "type": "method", "name": "TLSSocket", "desc": "

Construct a new TLSSocket object from existing TCP socket.\n\n

\n

socket is an instance of [net.Socket][]\n\n

\n

options is an optional object that might contain following properties:\n\n

\n\n", "signatures": [ { "params": [ { "name": "socket" }, { "name": "options", "optional": true } ] } ] }, { "textRaw": "tlsSocket.address()", "type": "method", "name": "address", "desc": "

Returns the bound address, the address family name and port of the\nunderlying socket as reported by the operating system. Returns an\nobject with three properties, e.g.\n{ port: 12346, family: 'IPv4', address: '127.0.0.1' }\n\n

\n", "signatures": [ { "params": [] } ] }, { "textRaw": "tlsSocket.getCipher()", "type": "method", "name": "getCipher", "desc": "

Returns an object representing the cipher name and the SSL/TLS\nprotocol version of the current connection.\n\n

\n

Example:\n{ name: 'AES256-SHA', version: 'TLSv1/SSLv3' }\n\n

\n

See SSL_CIPHER_get_name() and SSL_CIPHER_get_version() in\nhttps://www.openssl.org/docs/ssl/ssl.html#DEALING_WITH_CIPHERS for more\ninformation.\n\n

\n", "signatures": [ { "params": [] } ] }, { "textRaw": "tlsSocket.getEphemeralKeyInfo()", "type": "method", "name": "getEphemeralKeyInfo", "desc": "

Returns an object representing a type, name and size of parameter of\nan ephemeral key exchange in [Perfect forward Secrecy][] on a client\nconnection. It returns an empty object when the key exchange is not\nephemeral. As it is only supported on a client socket, it returns null\nif this is called on a server socket. The supported types are 'DH' and\n'ECDH'. The name property is only available in 'ECDH'.\n\n

\n

Example:\n\n

\n
{ type: 'ECDH', name: 'prime256v1', size: 256 }
\n", "signatures": [ { "params": [] } ] }, { "textRaw": "tlsSocket.getPeerCertificate([ detailed ])", "type": "method", "name": "getPeerCertificate", "desc": "

Returns an object representing the peer's certificate. The returned object has\nsome properties corresponding to the field of the certificate. If detailed\nargument is true - the full chain with issuer property will be returned,\nif false - only the top certificate without issuer property.\n\n

\n

Example:\n\n

\n
{ subject:\n   { C: 'UK',\n     ST: 'Acknack Ltd',\n     L: 'Rhys Jones',\n     O: 'node.js',\n     OU: 'Test TLS Certificate',\n     CN: 'localhost' },\n  issuerInfo:\n   { C: 'UK',\n     ST: 'Acknack Ltd',\n     L: 'Rhys Jones',\n     O: 'node.js',\n     OU: 'Test TLS Certificate',\n     CN: 'localhost' },\n  issuer:\n   { ... another certificate ... },\n  raw: < RAW DER buffer >,\n  valid_from: 'Nov 11 09:52:22 2009 GMT',\n  valid_to: 'Nov  6 09:52:22 2029 GMT',\n  fingerprint: '2A:7A:C2:DD:E5:F9:CC:53:72:35:99:7A:02:5A:71:38:52:EC:8A:DF',\n  serialNumber: 'B9B0D332A1AA5635' }
\n

If the peer does not provide a certificate, it returns null or an empty\nobject.\n\n\n

\n", "signatures": [ { "params": [ { "name": "detailed", "optional": true } ] } ] }, { "textRaw": "tlsSocket.getSession()", "type": "method", "name": "getSession", "desc": "

Return ASN.1 encoded TLS session or undefined if none was negotiated. Could\nbe used to speed up handshake establishment when reconnecting to the server.\n\n

\n", "signatures": [ { "params": [] } ] }, { "textRaw": "tlsSocket.getTLSTicket()", "type": "method", "name": "getTLSTicket", "desc": "

NOTE: Works only with client TLS sockets. Useful only for debugging, for\nsession reuse provide session option to tls.connect.\n\n

\n

Return TLS session ticket or undefined if none was negotiated.\n\n

\n", "signatures": [ { "params": [] } ] }, { "textRaw": "tlsSocket.renegotiate(options, callback)", "type": "method", "name": "renegotiate", "desc": "

Initiate TLS renegotiation process. The options may contain the following\nfields: rejectUnauthorized, requestCert (See [tls.createServer][]\nfor details). callback(err) will be executed with null as err,\nonce the renegotiation is successfully completed.\n\n

\n

NOTE: Can be used to request peer's certificate after the secure connection\nhas been established.\n\n

\n

ANOTHER NOTE: When running as the server, socket will be destroyed\nwith an error after handshakeTimeout timeout.\n\n

\n", "signatures": [ { "params": [ { "name": "options" }, { "name": "callback" } ] } ] }, { "textRaw": "tlsSocket.setMaxSendFragment(size)", "type": "method", "name": "setMaxSendFragment", "desc": "

Set maximum TLS fragment size (default and maximum value is: 16384, minimum\nis: 512). Returns true on success, false otherwise.\n\n

\n

Smaller fragment size decreases buffering latency on the client: large\nfragments are buffered by the TLS layer until the entire fragment is received\nand its integrity is verified; large fragments can span multiple roundtrips,\nand their processing can be delayed due to packet loss or reordering. However,\nsmaller fragments add extra TLS framing bytes and CPU overhead, which may\ndecrease overall server throughput.\n\n\n

\n", "signatures": [ { "params": [ { "name": "size" } ] } ] } ], "events": [ { "textRaw": "Event: 'OCSPResponse'", "type": "event", "name": "OCSPResponse", "desc": "

function (response) { }\n\n

\n

This event will be emitted if requestOCSP option was set. response is a\nbuffer object, containing server's OCSP response.\n\n

\n

Traditionally, the response is a signed object from the server's CA that\ncontains information about server's certificate revocation status.\n\n

\n", "params": [] }, { "textRaw": "Event: 'secureConnect'", "type": "event", "name": "secureConnect", "desc": "

This event is emitted after a new connection has been successfully handshaked.\nThe listener will be called no matter if the server's certificate was\nauthorized or not. It is up to the user to test tlsSocket.authorized\nto see if the server certificate was signed by one of the specified CAs.\nIf tlsSocket.authorized === false then the error can be found in\ntlsSocket.authorizationError. Also if ALPN or NPN was used - you can\ncheck tlsSocket.alpnProtocol or tlsSocket.npnProtocol for the\nnegotiated protocol.\n\n

\n", "params": [] } ], "properties": [ { "textRaw": "tlsSocket.authorized", "name": "authorized", "desc": "

A boolean that is true if the peer certificate was signed by one of the\nspecified CAs, otherwise false\n\n

\n" }, { "textRaw": "tlsSocket.authorizationError", "name": "authorizationError", "desc": "

The reason why the peer's certificate has not been verified. This property\nbecomes available only when tlsSocket.authorized === false.\n\n

\n" }, { "textRaw": "tlsSocket.encrypted", "name": "encrypted", "desc": "

Static boolean value, always true. May be used to distinguish TLS sockets\nfrom regular ones.\n\n

\n" }, { "textRaw": "tlsSocket.localAddress", "name": "localAddress", "desc": "

The string representation of the local IP address.\n\n

\n" }, { "textRaw": "tlsSocket.localPort", "name": "localPort", "desc": "

The numeric representation of the local port.\n\n

\n" }, { "textRaw": "tlsSocket.remoteAddress", "name": "remoteAddress", "desc": "

The string representation of the remote IP address. For example,\n'74.125.127.100' or '2001:4860:a005::68'.\n\n

\n" }, { "textRaw": "tlsSocket.remoteFamily", "name": "remoteFamily", "desc": "

The string representation of the remote IP family. 'IPv4' or 'IPv6'.\n\n

\n" }, { "textRaw": "tlsSocket.remotePort", "name": "remotePort", "desc": "

The numeric representation of the remote port. For example, 443.\n\n

\n" } ] } ], "methods": [ { "textRaw": "tls.connect(options[, callback])", "type": "method", "name": "connect", "desc": "

Creates a new client connection to the given port and host (old API) or\noptions.port and options.host. (If host is omitted, it defaults to\nlocalhost.) options should be an object which specifies:\n\n

\n\n

The callback parameter will be added as a listener for the\n['secureConnect'][] event.\n\n

\n

tls.connect() returns a [tls.TLSSocket][] object.\n\n

\n

Here is an example of a client of echo server as described previously:\n\n

\n
const tls = require('tls');\nconst fs = require('fs');\n\nconst options = {\n  // These are necessary only if using the client certificate authentication\n  key: fs.readFileSync('client-key.pem'),\n  cert: fs.readFileSync('client-cert.pem'),\n\n  // This is necessary only if the server uses the self-signed certificate\n  ca: [ fs.readFileSync('server-cert.pem') ]\n};\n\nvar socket = tls.connect(8000, options, () => {\n  console.log('client connected',\n              socket.authorized ? 'authorized' : 'unauthorized');\n  process.stdin.pipe(socket);\n  process.stdin.resume();\n});\nsocket.setEncoding('utf8');\nsocket.on('data', (data) => {\n  console.log(data);\n});\nsocket.on('end', () => {\n  server.close();\n});
\n

Or\n\n

\n
const tls = require('tls');\nconst fs = require('fs');\n\nconst options = {\n  pfx: fs.readFileSync('client.pfx')\n};\n\nvar socket = tls.connect(8000, options, () => {\n  console.log('client connected',\n              socket.authorized ? 'authorized' : 'unauthorized');\n  process.stdin.pipe(socket);\n  process.stdin.resume();\n});\nsocket.setEncoding('utf8');\nsocket.on('data', (data) => {\n  console.log(data);\n});\nsocket.on('end', () => {\n  server.close();\n});
\n", "signatures": [ { "params": [ { "name": "port" }, { "name": "host", "optional": true }, { "name": "options", "optional": true }, { "name": "callback", "optional": true } ] }, { "params": [ { "name": "options" }, { "name": "callback", "optional": true } ] } ] }, { "textRaw": "tls.connect(port[, host][, options][, callback])", "type": "method", "name": "connect", "desc": "

Creates a new client connection to the given port and host (old API) or\noptions.port and options.host. (If host is omitted, it defaults to\nlocalhost.) options should be an object which specifies:\n\n

\n\n

The callback parameter will be added as a listener for the\n['secureConnect'][] event.\n\n

\n

tls.connect() returns a [tls.TLSSocket][] object.\n\n

\n

Here is an example of a client of echo server as described previously:\n\n

\n
const tls = require('tls');\nconst fs = require('fs');\n\nconst options = {\n  // These are necessary only if using the client certificate authentication\n  key: fs.readFileSync('client-key.pem'),\n  cert: fs.readFileSync('client-cert.pem'),\n\n  // This is necessary only if the server uses the self-signed certificate\n  ca: [ fs.readFileSync('server-cert.pem') ]\n};\n\nvar socket = tls.connect(8000, options, () => {\n  console.log('client connected',\n              socket.authorized ? 'authorized' : 'unauthorized');\n  process.stdin.pipe(socket);\n  process.stdin.resume();\n});\nsocket.setEncoding('utf8');\nsocket.on('data', (data) => {\n  console.log(data);\n});\nsocket.on('end', () => {\n  server.close();\n});
\n

Or\n\n

\n
const tls = require('tls');\nconst fs = require('fs');\n\nconst options = {\n  pfx: fs.readFileSync('client.pfx')\n};\n\nvar socket = tls.connect(8000, options, () => {\n  console.log('client connected',\n              socket.authorized ? 'authorized' : 'unauthorized');\n  process.stdin.pipe(socket);\n  process.stdin.resume();\n});\nsocket.setEncoding('utf8');\nsocket.on('data', (data) => {\n  console.log(data);\n});\nsocket.on('end', () => {\n  server.close();\n});
\n", "signatures": [ { "params": [ { "name": "port" }, { "name": "host", "optional": true }, { "name": "options", "optional": true }, { "name": "callback", "optional": true } ] } ] }, { "textRaw": "tls.createSecureContext(details)", "type": "method", "name": "createSecureContext", "desc": "

Creates a credentials object, with the optional details being a\ndictionary with keys:\n\n

\n\n

If no 'ca' details are given, then Node.js will use the default\npublicly trusted list of CAs as given in\n

\n

http://mxr.mozilla.org/mozilla/source/security/nss/lib/ckfw/builtins/certdata.txt.\n\n

\n", "signatures": [ { "params": [ { "name": "details" } ] } ] }, { "textRaw": "tls.createSecurePair([context][, isServer][, requestCert][, rejectUnauthorized][, options])", "type": "method", "name": "createSecurePair", "desc": "

Creates a new secure pair object with two streams, one of which reads/writes\nencrypted data, and one reads/writes cleartext data.\nGenerally the encrypted one is piped to/from an incoming encrypted data stream,\nand the cleartext one is used as a replacement for the initial encrypted stream.\n\n

\n\n

tls.createSecurePair() returns a SecurePair object with cleartext and\nencrypted stream properties.\n\n

\n

NOTE: cleartext has the same APIs as [tls.TLSSocket][]\n\n

\n", "signatures": [ { "params": [ { "name": "context", "optional": true }, { "name": "isServer", "optional": true }, { "name": "requestCert", "optional": true }, { "name": "rejectUnauthorized", "optional": true }, { "name": "options", "optional": true } ] } ] }, { "textRaw": "tls.createServer(options[, secureConnectionListener])", "type": "method", "name": "createServer", "desc": "

Creates a new [tls.Server][]. The connectionListener argument is\nautomatically set as a listener for the ['secureConnection'][] event. The\noptions object has these possibilities:\n\n

\n\n

Here is a simple example echo server:\n\n

\n
const tls = require('tls');\nconst fs = require('fs');\n\nconst options = {\n  key: fs.readFileSync('server-key.pem'),\n  cert: fs.readFileSync('server-cert.pem'),\n\n  // This is necessary only if using the client certificate authentication.\n  requestCert: true,\n\n  // This is necessary only if the client uses the self-signed certificate.\n  ca: [ fs.readFileSync('client-cert.pem') ]\n};\n\nvar server = tls.createServer(options, (socket) => {\n  console.log('server connected',\n              socket.authorized ? 'authorized' : 'unauthorized');\n  socket.write('welcome!\\n');\n  socket.setEncoding('utf8');\n  socket.pipe(socket);\n});\nserver.listen(8000, () => {\n  console.log('server bound');\n});
\n

Or\n\n

\n
const tls = require('tls');\nconst fs = require('fs');\n\nconst options = {\n  pfx: fs.readFileSync('server.pfx'),\n\n  // This is necessary only if using the client certificate authentication.\n  requestCert: true,\n\n};\n\nvar server = tls.createServer(options, (socket) => {\n  console.log('server connected',\n              socket.authorized ? 'authorized' : 'unauthorized');\n  socket.write('welcome!\\n');\n  socket.setEncoding('utf8');\n  socket.pipe(socket);\n});\nserver.listen(8000, () => {\n  console.log('server bound');\n});
\n

You can test this server by connecting to it with openssl s_client:\n\n\n

\n
openssl s_client -connect 127.0.0.1:8000
\n", "signatures": [ { "params": [ { "name": "options" }, { "name": "secureConnectionListener", "optional": true } ] } ] }, { "textRaw": "tls.getCiphers()", "type": "method", "name": "getCiphers", "desc": "

Returns an array with the names of the supported SSL ciphers.\n\n

\n

Example:\n\n

\n
var ciphers = tls.getCiphers();\nconsole.log(ciphers); // ['AES128-SHA', 'AES256-SHA', ...]
\n", "signatures": [ { "params": [] } ] } ], "type": "module", "displayName": "TLS (SSL)" } ] }