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Diffstat (limited to 'node_modules/socks/build/common/helpers.js')
| -rw-r--r-- | node_modules/socks/build/common/helpers.js | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/node_modules/socks/build/common/helpers.js b/node_modules/socks/build/common/helpers.js new file mode 100644 index 0000000..f84db8f --- /dev/null +++ b/node_modules/socks/build/common/helpers.js @@ -0,0 +1,128 @@ +"use strict"; +Object.defineProperty(exports, "__esModule", { value: true }); +exports.validateSocksClientChainOptions = exports.validateSocksClientOptions = void 0; +const util_1 = require("./util"); +const constants_1 = require("./constants"); +const stream = require("stream"); +/** + * Validates the provided SocksClientOptions + * @param options { SocksClientOptions } + * @param acceptedCommands { string[] } A list of accepted SocksProxy commands. + */ +function validateSocksClientOptions(options, acceptedCommands = ['connect', 'bind', 'associate']) { + // Check SOCKs command option. + if (!constants_1.SocksCommand[options.command]) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksCommand, options); + } + // Check SocksCommand for acceptable command. + if (acceptedCommands.indexOf(options.command) === -1) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksCommandForOperation, options); + } + // Check destination + if (!isValidSocksRemoteHost(options.destination)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsDestination, options); + } + // Check SOCKS proxy to use + if (!isValidSocksProxy(options.proxy)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsProxy, options); + } + // Validate custom auth (if set) + validateCustomProxyAuth(options.proxy, options); + // Check timeout + if (options.timeout && !isValidTimeoutValue(options.timeout)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsTimeout, options); + } + // Check existing_socket (if provided) + if (options.existing_socket && + !(options.existing_socket instanceof stream.Duplex)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsExistingSocket, options); + } +} +exports.validateSocksClientOptions = validateSocksClientOptions; +/** + * Validates the SocksClientChainOptions + * @param options { SocksClientChainOptions } + */ +function validateSocksClientChainOptions(options) { + // Only connect is supported when chaining. + if (options.command !== 'connect') { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksCommandChain, options); + } + // Check destination + if (!isValidSocksRemoteHost(options.destination)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsDestination, options); + } + // Validate proxies (length) + if (!(options.proxies && + Array.isArray(options.proxies) && + options.proxies.length >= 2)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsProxiesLength, options); + } + // Validate proxies + options.proxies.forEach((proxy) => { + if (!isValidSocksProxy(proxy)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsProxy, options); + } + // Validate custom auth (if set) + validateCustomProxyAuth(proxy, options); + }); + // Check timeout + if (options.timeout && !isValidTimeoutValue(options.timeout)) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsTimeout, options); + } +} +exports.validateSocksClientChainOptions = validateSocksClientChainOptions; +function validateCustomProxyAuth(proxy, options) { + if (proxy.custom_auth_method !== undefined) { + // Invalid auth method range + if (proxy.custom_auth_method < constants_1.SOCKS5_CUSTOM_AUTH_START || + proxy.custom_auth_method > constants_1.SOCKS5_CUSTOM_AUTH_END) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsCustomAuthRange, options); + } + // Missing custom_auth_request_handler + if (proxy.custom_auth_request_handler === undefined || + typeof proxy.custom_auth_request_handler !== 'function') { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsCustomAuthOptions, options); + } + // Missing custom_auth_response_size + if (proxy.custom_auth_response_size === undefined) { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsCustomAuthOptions, options); + } + // Missing/invalid custom_auth_response_handler + if (proxy.custom_auth_response_handler === undefined || + typeof proxy.custom_auth_response_handler !== 'function') { + throw new util_1.SocksClientError(constants_1.ERRORS.InvalidSocksClientOptionsCustomAuthOptions, options); + } + } +} +/** + * Validates a SocksRemoteHost + * @param remoteHost { SocksRemoteHost } + */ +function isValidSocksRemoteHost(remoteHost) { + return (remoteHost && + typeof remoteHost.host === 'string' && + typeof remoteHost.port === 'number' && + remoteHost.port >= 0 && + remoteHost.port <= 65535); +} +/** + * Validates a SocksProxy + * @param proxy { SocksProxy } + */ +function isValidSocksProxy(proxy) { + return (proxy && + (typeof proxy.host === 'string' || typeof proxy.ipaddress === 'string') && + typeof proxy.port === 'number' && + proxy.port >= 0 && + proxy.port <= 65535 && + (proxy.type === 4 || proxy.type === 5)); +} +/** + * Validates a timeout value. + * @param value { Number } + */ +function isValidTimeoutValue(value) { + return typeof value === 'number' && value > 0; +} +//# sourceMappingURL=helpers.js.map
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