@salesforce/core/lib/keyChainImpl.js

"use strict";
/*
 * Copyright (c) 2018, salesforce.com, inc.
 * All rights reserved.
 * SPDX-License-Identifier: BSD-3-Clause
 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/BSD-3-Clause
 */
Object.defineProperty(exports, "__esModule", { value: true });
const ts_types_1 = require("@salesforce/ts-types");
const childProcess = require("child_process");
const nodeFs = require("fs");
const os = require("os");
const path = require("path");
const configFile_1 = require("./config/configFile");
const keychainConfig_1 = require("./config/keychainConfig");
const global_1 = require("./global");
const sfdxError_1 = require("./sfdxError");
const fs_1 = require("./util/fs");
/* tslint:disable: no-bitwise */
const GET_PASSWORD_RETRY_COUNT = 3;
/**
 * Helper to reduce an array of cli args down to a presentable string for logging.
 * @param optionsArray CLI command args.
 */
function _optionsToString(optionsArray) {
    return optionsArray.reduce((accum, element) => `${accum} ${element}`);
}
/**
 * Helper to determine if a program is executable. Returns `true` if the program is executable for the user. For
 * Windows true is always returned.
 * @param mode Stats mode.
 * @param gid Unix group id.
 * @param uid Unix user id.
 */
const _isExe = (mode, gid, uid) => {
    if (process.platform === 'win32') {
        return true;
    }
    return Boolean(mode & parseInt('0001', 8) ||
        (mode & parseInt('0010', 8) && process.getgid && gid === process.getgid()) ||
        (mode & parseInt('0100', 8) && process.getuid && uid === process.getuid()));
};
/**
 * Private helper to validate that a program exists on the file system and is executable.
 *
 * **Throws** *{@link SfdxError}{ name: 'MissingCredentialProgramError' }* When the OS credential program isn't found.
 *
 * **Throws** *{@link SfdxError}{ name: 'CredentialProgramAccessError' }* When the OS credential program isn't accessible.
 *
 * @param programPath The absolute path of the program.
 * @param fsIfc The file system interface.
 * @param isExeIfc Executable validation function.
 */
const _validateProgram = async (programPath, fsIfc, isExeIfc) => {
    let noPermission;
    try {
        const stats = fsIfc.statSync(programPath);
        noPermission = !isExeIfc(stats.mode, stats.gid, stats.uid);
    }
    catch (e) {
        throw sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'MissingCredentialProgramError', [programPath]);
    }
    if (noPermission) {
        throw sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'CredentialProgramAccessError', [programPath]);
    }
};
/**
 * @private
 */
class KeychainAccess {
    /**
     * Abstract prototype for general cross platform keychain interaction.
     * @param osImpl The platform impl for (linux, darwin, windows).
     * @param fsIfc The file system interface.
     */
    constructor(osImpl, fsIfc) {
        this.osImpl = osImpl;
        this.fsIfc = fsIfc;
    }
    /**
     * Validates the os level program is executable.
     */
    async validateProgram() {
        await _validateProgram(this.osImpl.getProgram(), this.fsIfc, _isExe);
    }
    /**
     * Returns a password using the native program for credential management.
     * @param opts Options for the credential lookup.
     * @param fn Callback function (err, password).
     * @param retryCount Used internally to track the number of retries for getting a password out of the keychain.
     */
    async getPassword(opts, fn, retryCount = 0) {
        if (opts.service == null) {
            fn(sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'KeyChainServiceRequiredError'));
            return;
        }
        if (opts.account == null) {
            fn(sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'KeyChainAccountRequiredError'));
            return;
        }
        await this.validateProgram();
        const credManager = this.osImpl.getCommandFunc(opts, childProcess.spawn);
        let stdout = '';
        let stderr = '';
        if (credManager.stdout) {
            credManager.stdout.on('data', data => {
                stdout += data;
            });
        }
        if (credManager.stderr) {
            credManager.stderr.on('data', data => {
                stderr += data;
            });
        }
        credManager.on('close', async (code) => {
            try {
                return await this.osImpl.onGetCommandClose(code, stdout, stderr, opts, fn);
            }
            catch (e) {
                if (e.retry) {
                    if (retryCount >= GET_PASSWORD_RETRY_COUNT) {
                        throw sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'PasswordRetryError', [GET_PASSWORD_RETRY_COUNT]);
                    }
                    return this.getPassword(opts, fn, retryCount + 1);
                }
                else {
                    // if retry
                    throw e;
                }
            }
        });
        if (credManager.stdin) {
            credManager.stdin.end();
        }
    }
    /**
     * Sets a password using the native program for credential management.
     * @param opts Options for the credential lookup.
     * @param fn Callback function (err, password).
     */
    async setPassword(opts, fn) {
        if (opts.service == null) {
            fn(sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'KeyChainServiceRequiredError'));
            return;
        }
        if (opts.account == null) {
            fn(sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'KeyChainAccountRequiredError'));
            return;
        }
        if (opts.password == null) {
            fn(sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'PasswordRequiredError'));
            return;
        }
        await _validateProgram(this.osImpl.getProgram(), this.fsIfc, _isExe);
        const credManager = this.osImpl.setCommandFunc(opts, childProcess.spawn);
        let stdout = '';
        let stderr = '';
        if (credManager.stdout) {
            credManager.stdout.on('data', (data) => {
                stdout += data;
            });
        }
        if (credManager.stderr) {
            credManager.stderr.on('data', (data) => {
                stderr += data;
            });
        }
        credManager.on('close', async (code) => await this.osImpl.onSetCommandClose(code, stdout, stderr, opts, fn));
        if (credManager.stdin) {
            credManager.stdin.end();
        }
    }
}
exports.KeychainAccess = KeychainAccess;
/**
 * Linux implementation.
 *
 * Uses libsecret.
 */
const _linuxImpl = {
    getProgram() {
        return process.env.SFDX_SECRET_TOOL_PATH || path.join(path.sep, 'usr', 'bin', 'secret-tool');
    },
    getProgramOptions(opts) {
        return ['lookup', 'user', opts.account, 'domain', opts.service];
    },
    getCommandFunc(opts, fn) {
        return fn(_linuxImpl.getProgram(), _linuxImpl.getProgramOptions(opts));
    },
    async onGetCommandClose(code, stdout, stderr, opts, fn) {
        if (code === 1) {
            const command = `${_linuxImpl.getProgram()} ${_optionsToString(_linuxImpl.getProgramOptions(opts))}`;
            const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'PasswordNotFoundError', [`\n${stdout} - ${stderr}`], 'PasswordNotFoundErrorAction', [command]);
            const error = sfdxError_1.SfdxError.create(errorConfig);
            // This is a workaround for linux.
            // Calling secret-tool too fast can cause it to return an unexpected error. (below)
            if (stderr != null && stderr.includes('invalid or unencryptable secret')) {
                // @ts-ignore TODO: make an error subclass with this field
                error.retry = true;
                // Throwing here allows us to perform a retry in KeychainAccess
                throw error;
            }
            // All other issues we will report back to the handler.
            fn(error);
        }
        else {
            fn(null, stdout.trim());
        }
    },
    setProgramOptions(opts) {
        return ['store', "--label='salesforce.com'", 'user', opts.account, 'domain', opts.service];
    },
    setCommandFunc(opts, fn) {
        const secretTool = fn(_linuxImpl.getProgram(), _linuxImpl.setProgramOptions(opts));
        if (secretTool.stdin) {
            secretTool.stdin.write(`${opts.password}\n`);
        }
        return secretTool;
    },
    async onSetCommandClose(code, stdout, stderr, opts, fn) {
        if (code !== 0) {
            const command = `${_linuxImpl.getProgram()} ${_optionsToString(_linuxImpl.setProgramOptions(opts))}`;
            const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'SetCredentialError', [`\n${stdout} - ${stderr}`], 'SetCredentialErrorAction', [os.userInfo().username, command]);
            fn(sfdxError_1.SfdxError.create(errorConfig));
        }
        else {
            fn(null);
        }
    }
};
/**
 * OSX implementation.
 *
 * /usr/bin/security is a cli front end for OSX keychain.
 */
const _darwinImpl = {
    getProgram() {
        return path.join(path.sep, 'usr', 'bin', 'security');
    },
    getProgramOptions(opts) {
        return ['find-generic-password', '-a', opts.account, '-s', opts.service, '-g'];
    },
    getCommandFunc(opts, fn) {
        return fn(_darwinImpl.getProgram(), _darwinImpl.getProgramOptions(opts));
    },
    async onGetCommandClose(code, stdout, stderr, opts, fn) {
        let err;
        if (code !== 0) {
            switch (code) {
                case 128:
                    err = sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'KeyChainUserCanceledError');
                    break;
                default:
                    const command = `${_darwinImpl.getProgram()} ${_optionsToString(_darwinImpl.getProgramOptions(opts))}`;
                    const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'PasswordNotFoundError', [`\n${stdout} - ${stderr}`], 'PasswordNotFoundErrorAction', [command]);
                    err = sfdxError_1.SfdxError.create(errorConfig);
            }
            fn(err);
            return;
        }
        // For better or worse, the last line (containing the actual password) is actually written to stderr instead of
        // stdout. Reference: http://blog.macromates.com/2006/keychain-access-from-shell/
        if (/password/.test(stderr)) {
            const match = stderr.match(/"(.*)"/);
            if (!match || !match[1]) {
                const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'PasswordNotFoundError', [`\n${stdout} - ${stderr}`], 'PasswordNotFoundErrorAction');
                fn(sfdxError_1.SfdxError.create(errorConfig));
            }
            else {
                fn(null, match[1]);
            }
        }
        else {
            const command = `${_darwinImpl.getProgram()} ${_optionsToString(_darwinImpl.getProgramOptions(opts))}`;
            const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'PasswordNotFoundError', [`\n${stdout} - ${stderr}`], 'PasswordNotFoundErrorAction', [command]);
            fn(sfdxError_1.SfdxError.create(errorConfig));
        }
    },
    setProgramOptions(opts) {
        const result = ['add-generic-password', '-a', opts.account, '-s', opts.service];
        if (opts.password) {
            result.push('-w', opts.password);
        }
        return result;
    },
    setCommandFunc(opts, fn) {
        return fn(_darwinImpl.getProgram(), _darwinImpl.setProgramOptions(opts));
    },
    async onSetCommandClose(code, stdout, stderr, opts, fn) {
        if (code !== 0) {
            const command = `${_darwinImpl.getProgram()} ${_optionsToString(_darwinImpl.setProgramOptions(opts))}`;
            const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'SetCredentialError', [`\n${stdout} - ${stderr}`], 'SetCredentialErrorAction', [os.userInfo().username, command]);
            fn(sfdxError_1.SfdxError.create(errorConfig));
        }
        else {
            fn(null);
        }
    }
};
async function _writeFile(opts, fn) {
    try {
        const config = await keychainConfig_1.KeychainConfig.create(keychainConfig_1.KeychainConfig.getDefaultOptions());
        config.set(SecretField.ACCOUNT, opts.account);
        config.set(SecretField.KEY, opts.password || '');
        config.set(SecretField.SERVICE, opts.service);
        await config.write();
        fn(null, config.getContents());
    }
    catch (err) {
        fn(err);
    }
}
var SecretField;
(function (SecretField) {
    SecretField["SERVICE"] = "service";
    SecretField["ACCOUNT"] = "account";
    SecretField["KEY"] = "key";
})(SecretField || (SecretField = {}));
// istanbul ignore next - getPassword/setPassword is always mocked out
/**
 * @@ignore
 */
class GenericKeychainAccess {
    async getPassword(opts, fn) {
        // validate the file in .sfdx
        await this.isValidFileAccess(async (fileAccessError) => {
            // the file checks out.
            if (fileAccessError == null) {
                // read it's contents
                return keychainConfig_1.KeychainConfig.create(keychainConfig_1.KeychainConfig.getDefaultOptions())
                    .then((config) => {
                    // validate service name and account just because
                    if (opts.service === config.get(SecretField.SERVICE) && opts.account === config.get(SecretField.ACCOUNT)) {
                        const key = config.get(SecretField.KEY);
                        fn(null, ts_types_1.asString(key));
                    }
                    else {
                        // if the service and account names don't match then maybe someone or something is editing
                        // that file. #donotallow
                        const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'GenericKeychainServiceError', [keychainConfig_1.KeychainConfig.getFileName()], 'GenericKeychainServiceErrorAction');
                        const err = sfdxError_1.SfdxError.create(errorConfig);
                        fn(err);
                    }
                })
                    .catch(readJsonErr => {
                    fn(readJsonErr);
                });
            }
            else {
                if (fileAccessError.code === 'ENOENT') {
                    fn(sfdxError_1.SfdxError.create('@salesforce/core', 'encryption', 'PasswordNotFoundError', []));
                }
                else {
                    fn(fileAccessError);
                }
            }
        });
    }
    async setPassword(opts, fn) {
        // validate the file in .sfdx
        await this.isValidFileAccess(async (fileAccessError) => {
            // if there is a validation error
            if (fileAccessError != null) {
                // file not found
                if (fileAccessError.code === 'ENOENT') {
                    // create the file
                    await _writeFile.call(this, opts, fn);
                }
                else {
                    fn(fileAccessError);
                }
            }
            else {
                // the existing file validated. we can write the updated key
                await _writeFile.call(this, opts, fn);
            }
        });
    }
    async isValidFileAccess(cb) {
        try {
            const root = await configFile_1.ConfigFile.resolveRootFolder(true);
            await fs_1.fs.access(path.join(root, global_1.Global.STATE_FOLDER), fs_1.fs.constants.R_OK | fs_1.fs.constants.X_OK | fs_1.fs.constants.W_OK);
            await cb(null);
        }
        catch (err) {
            await cb(err);
        }
    }
}
exports.GenericKeychainAccess = GenericKeychainAccess;
/**
 * @ignore
 */
// istanbul ignore next - getPassword/setPassword is always mocked out
class GenericUnixKeychainAccess extends GenericKeychainAccess {
    async isValidFileAccess(cb) {
        const secretFile = path.join(await configFile_1.ConfigFile.resolveRootFolder(true), global_1.Global.STATE_FOLDER, ts_types_1.ensure(keychainConfig_1.KeychainConfig.getDefaultOptions().filename));
        await super.isValidFileAccess(async (err) => {
            if (err != null) {
                await cb(err);
            }
            else {
                const keyFile = await keychainConfig_1.KeychainConfig.create(keychainConfig_1.KeychainConfig.getDefaultOptions());
                const stats = await keyFile.stat();
                const octalModeStr = (stats.mode & 0o777).toString(8);
                const EXPECTED_OCTAL_PERM_VALUE = '600';
                if (octalModeStr === EXPECTED_OCTAL_PERM_VALUE) {
                    await cb(null);
                }
                else {
                    const errorConfig = new sfdxError_1.SfdxErrorConfig('@salesforce/core', 'encryption', 'GenericKeychainInvalidPermsError', undefined, 'GenericKeychainInvalidPermsErrorAction', [secretFile, EXPECTED_OCTAL_PERM_VALUE]);
                    await cb(sfdxError_1.SfdxError.create(errorConfig));
                }
            }
        });
    }
}
exports.GenericUnixKeychainAccess = GenericUnixKeychainAccess;
/**
 * @ignore
 */
class GenericWindowsKeychainAccess extends GenericKeychainAccess {
    async isValidFileAccess(cb) {
        await super.isValidFileAccess(async (err) => {
            if (err != null) {
                await cb(err);
            }
            else {
                try {
                    const secretFile = path.join(await configFile_1.ConfigFile.resolveRootFolder(true), global_1.Global.STATE_FOLDER, ts_types_1.ensure(keychainConfig_1.KeychainConfig.getDefaultOptions().filename));
                    await fs_1.fs.access(secretFile, fs_1.fs.constants.R_OK | fs_1.fs.constants.W_OK);
                    await cb(null);
                }
                catch (e) {
                    await cb(err);
                }
            }
        });
    }
}
exports.GenericWindowsKeychainAccess = GenericWindowsKeychainAccess;
/**
 * @ignore
 */
exports.keyChainImpl = {
    generic_unix: new GenericUnixKeychainAccess(),
    generic_windows: new GenericWindowsKeychainAccess(),
    darwin: new KeychainAccess(_darwinImpl, nodeFs),
    linux: new KeychainAccess(_linuxImpl, nodeFs),
    validateProgram: _validateProgram
};
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