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'use strict';
const internalUtil = require('internal/util');
internalUtil.assertCrypto();
const net = require('net');
const url = require('url');
const binding = process.binding('crypto');
const Buffer = require('buffer').Buffer;
// Allow {CLIENT_RENEG_LIMIT} client-initiated session renegotiations
// every {CLIENT_RENEG_WINDOW} seconds. An error event is emitted if more
// renegotations are seen. The settings are applied to all remote client
// connections.
exports.CLIENT_RENEG_LIMIT = 3;
exports.CLIENT_RENEG_WINDOW = 600;
exports.SLAB_BUFFER_SIZE = 10 * 1024 * 1024;
exports.DEFAULT_CIPHERS =
process.binding('constants').crypto.defaultCipherList;
exports.DEFAULT_ECDH_CURVE = 'prime256v1';
exports.getCiphers = internalUtil.cachedResult(
() => internalUtil.filterDuplicateStrings(binding.getSSLCiphers(), true)
);
// Convert protocols array into valid OpenSSL protocols list
// ("\x06spdy/2\x08http/1.1\x08http/1.0")
function convertProtocols(protocols) {
const lens = new Array(protocols.length);
const buff = Buffer.allocUnsafe(protocols.reduce((p, c, i) => {
var len = Buffer.byteLength(c);
lens[i] = len;
return p + 1 + len;
}, 0));
var offset = 0;
for (var i = 0, c = protocols.length; i < c; i++) {
buff[offset++] = lens[i];
buff.write(protocols[i], offset);
offset += lens[i];
}
return buff;
}
exports.convertNPNProtocols = function(protocols, out) {
// If protocols is Array - translate it into buffer
if (Array.isArray(protocols)) {
out.NPNProtocols = convertProtocols(protocols);
} else if (protocols instanceof Buffer) {
// Copy new buffer not to be modified by user.
out.NPNProtocols = Buffer.from(protocols);
}
};
exports.convertALPNProtocols = function(protocols, out) {
// If protocols is Array - translate it into buffer
if (Array.isArray(protocols)) {
out.ALPNProtocols = convertProtocols(protocols);
} else if (protocols instanceof Buffer) {
// Copy new buffer not to be modified by user.
out.ALPNProtocols = Buffer.from(protocols);
}
};
function unfqdn(host) {
return host.replace(/[.]$/, '');
}
function splitHost(host) {
// String#toLowerCase() is locale-sensitive so we use
// a conservative version that only lowercases A-Z.
const replacer = (c) => String.fromCharCode(32 + c.charCodeAt(0));
return unfqdn(host).replace(/[A-Z]/g, replacer).split('.');
}
function check(hostParts, pattern, wildcards) {
// Empty strings, null, undefined, etc. never match.
if (!pattern)
return false;
const patternParts = splitHost(pattern);
if (hostParts.length !== patternParts.length)
return false;
// Pattern has empty components, e.g. "bad..example.com".
if (patternParts.includes(''))
return false;
// RFC 6125 allows IDNA U-labels (Unicode) in names but we have no
// good way to detect their encoding or normalize them so we simply
// reject them. Control characters and blanks are rejected as well
// because nothing good can come from accepting them.
const isBad = (s) => /[^\u0021-\u007F]/u.test(s);
if (patternParts.some(isBad))
return false;
// Check host parts from right to left first.
for (var i = hostParts.length - 1; i > 0; i -= 1)
if (hostParts[i] !== patternParts[i])
return false;
const hostSubdomain = hostParts[0];
const patternSubdomain = patternParts[0];
const patternSubdomainParts = patternSubdomain.split('*');
// Short-circuit when the subdomain does not contain a wildcard.
// RFC 6125 does not allow wildcard substitution for components
// containing IDNA A-labels (Punycode) so match those verbatim.
if (patternSubdomainParts.length === 1 || patternSubdomain.includes('xn--'))
return hostSubdomain === patternSubdomain;
if (!wildcards)
return false;
// More than one wildcard is always wrong.
if (patternSubdomainParts.length > 2)
return false;
// *.tld wildcards are not allowed.
if (patternParts.length <= 2)
return false;
const [prefix, suffix] = patternSubdomainParts;
if (prefix.length + suffix.length > hostSubdomain.length)
return false;
if (!hostSubdomain.startsWith(prefix))
return false;
if (!hostSubdomain.endsWith(suffix))
return false;
return true;
}
exports.checkServerIdentity = function checkServerIdentity(host, cert) {
const subject = cert.subject;
const altNames = cert.subjectaltname;
const dnsNames = [];
const uriNames = [];
const ips = [];
host = '' + host;
if (altNames) {
for (const name of altNames.split(', ')) {
if (name.startsWith('DNS:')) {
dnsNames.push(name.slice(4));
} else if (name.startsWith('URI:')) {
const uri = url.parse(name.slice(4));
uriNames.push(uri.hostname); // TODO(bnoordhuis) Also use scheme.
} else if (name.startsWith('IP Address:')) {
ips.push(name.slice(11));
}
}
}
let valid = false;
let reason = 'Unknown reason';
if (net.isIP(host)) {
valid = ips.includes(host);
if (!valid)
reason = `IP: ${host} is not in the cert's list: ${ips.join(', ')}`;
// TODO(bnoordhuis) Also check URI SANs that are IP addresses.
} else if (subject) {
host = unfqdn(host); // Remove trailing dot for error messages.
const hostParts = splitHost(host);
const wildcard = (pattern) => check(hostParts, pattern, true);
const noWildcard = (pattern) => check(hostParts, pattern, false);
// Match against Common Name only if no supported identifiers are present.
if (dnsNames.length === 0 && ips.length === 0 && uriNames.length === 0) {
const cn = subject.CN;
if (Array.isArray(cn))
valid = cn.some(wildcard);
else if (cn)
valid = wildcard(cn);
if (!valid)
reason = `Host: ${host}. is not cert's CN: ${cn}`;
} else {
valid = dnsNames.some(wildcard) || uriNames.some(noWildcard);
if (!valid)
reason = `Host: ${host}. is not in the cert's altnames: ${altNames}`;
}
} else {
reason = 'Cert is empty';
}
if (!valid) {
const err = new Error(
`Hostname/IP doesn't match certificate's altnames: "${reason}"`);
err.reason = reason;
err.host = host;
err.cert = cert;
return err;
}
};
// Example:
// C=US\nST=CA\nL=SF\nO=Joyent\nOU=Node.js\nCN=ca1\nemailAddress=ry@clouds.org
exports.parseCertString = function parseCertString(s) {
var out = {};
var parts = s.split('\n');
for (var i = 0, len = parts.length; i < len; i++) {
var sepIndex = parts[i].indexOf('=');
if (sepIndex > 0) {
var key = parts[i].slice(0, sepIndex);
var value = parts[i].slice(sepIndex + 1);
if (key in out) {
if (!Array.isArray(out[key])) {
out[key] = [out[key]];
}
out[key].push(value);
} else {
out[key] = value;
}
}
}
return out;
};
// Public API
exports.createSecureContext = require('_tls_common').createSecureContext;
exports.SecureContext = require('_tls_common').SecureContext;
exports.TLSSocket = require('_tls_wrap').TLSSocket;
exports.Server = require('_tls_wrap').Server;
exports.createServer = require('_tls_wrap').createServer;
exports.connect = require('_tls_wrap').connect;
exports.createSecurePair = require('_tls_legacy').createSecurePair;