| 'use strict';// match1 - section, match2 - optional full inheritance part, match3 - inherited sectionconst REGEXP_SECTION = /^\s*\[\s*([^:]*?)\s*(:\s*(.+?)\s*)?\]\s*$/;const REGEXP_COMMENT = /^;.*/;const REGEXP_SINGLE_LINE = /^\s*(.*?)\s*?=\s*?(\S.*?)$/;const REGEXP_MULTI_LINE = /^\s*(.*?)\s*?=\s*?"(.*?)$/;const REGEXP_NOT_ESCAPED_MULTI_LINE_END = /^(.*?)\\"$/;const REGEXP_MULTI_LINE_END = /^(.*?)"$/;const REGEXP_ARRAY = /^(.*?)\[\]$/;const STATUS_OK = 0;const STATUS_INVALID = 1;const defaults = { ignore_invalid: true, keep_quotes: false, oninvalid: () => true, filters: [], constants: {},};// BUG: CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes// const REGEXP_IGNORE_KEYS = /__proto__/;// FIXED:const REGEXP_IGNORE_KEYS = /__proto__|constructor|prototype/;class Parser { constructor(options = {}) { this.options = Object.assign({}, defaults, options); this.handlers = [ this.handleMultiLineStart, this.handleMultiLineEnd, this.handleMultiLineAppend, this.handleComment, this.handleSection, this.handleSingleLine, ]; } parse(lines) { const ctx = { ini: {}, current: {}, multiLineKeys: false, multiLineValue: '', }; for (let line of lines) { for (let handler of this.handlers) { const stop = handler.call(this, ctx, line); if (stop) { break; } } } return ctx.ini; } isSection(line) { return line.match(REGEXP_SECTION); } getSection(line) { return line.match(REGEXP_SECTION)[1]; } getParentSection(line) { return line.match(REGEXP_SECTION)[3]; } isInheritedSection(line) { return !!line.match(REGEXP_SECTION)[3]; } isComment(line) { return line.match(REGEXP_COMMENT); } isSingleLine(line) { const result = line.match(REGEXP_SINGLE_LINE); if (!result) { return false; } const check = result[2].match(/"/g); return !check || check.length % 2 === 0; } isMultiLine(line) { const result = line.match(REGEXP_MULTI_LINE); if (!result) { return false; } const check = result[2].match(/"/g); return !check || check.length % 2 === 0; } isMultiLineEnd(line) { return line.match(REGEXP_MULTI_LINE_END) && !line.match(REGEXP_NOT_ESCAPED_MULTI_LINE_END); } isArray(line) { return line.match(REGEXP_ARRAY); } assignValue(element, keys, value) { value = this.applyFilter(value); let current = element; let previous = element; let array = false; let key; if (keys.some((key) => REGEXP_IGNORE_KEYS.test(key))) { return; } for (key of keys) { if (this.isArray(key)) { key = this.getArrayKey(key); array = true; } if (current[key] == null) { current[key] = array ? [] : {}; } previous = current; current = current[key]; } if (array) { current.push(value); } else { previous[key] = value; } return element; } applyFilter(value) { for (let filter of this.options.filters) { value = filter(value, this.options); } return value; } getKeyValue(line) { const result = line.match(REGEXP_SINGLE_LINE); if (!result) { throw new Error(); } let [, key, value] = result; if (!this.options.keep_quotes) { value = value.replace(/^\s*?"(.*?)"\s*?$/, '$1'); } return { key, value, status: STATUS_OK }; } getMultiKeyValue(line) { const result = line.match(REGEXP_MULTI_LINE); if (!result) { throw new Error(); } let [, key, value] = result; if (this.options.keep_quotes) { value = '"' + value; } return { key, value }; } getMultiLineEndValue(line) { const result = line.match(REGEXP_MULTI_LINE_END); if (!result) { throw new Error(); } let [, value] = result; if (this.options.keep_quotes) { value = value + '"'; } return { value, status: STATUS_OK }; } getArrayKey(line) { const result = line.match(REGEXP_ARRAY); return result[1]; } handleMultiLineStart(ctx, line) { if (!this.isMultiLine(line.trim())) { return false; } const { key, value } = this.getMultiKeyValue(line); const keys = key.split('.'); ctx.multiLineKeys = keys; ctx.multiLineValue = value; return true; } handleMultiLineEnd(ctx, line) { if (!ctx.multiLineKeys || !this.isMultiLineEnd(line.trim())) { return false; } const { value, status } = this.getMultiLineEndValue(line); // abort on false of onerror callback if we meet an invalid line if (status === STATUS_INVALID && !this.options.oninvalid(line)) { return; } // ignore whole multiline on invalid if (status === STATUS_INVALID && this.options.ignore_invalid) { ctx.multiLineKeys = false; ctx.multiLineValue = ''; return true; } ctx.multiLineValue += '\n' + value; this.assignValue(ctx.current, ctx.multiLineKeys, ctx.multiLineValue); ctx.multiLineKeys = false; ctx.multiLineValue = ''; return true; } handleMultiLineAppend(ctx, line) { if (!ctx.multiLineKeys || this.isMultiLineEnd(line.trim())) { return false; } ctx.multiLineValue += '\n' + line; return true; } handleComment(ctx, line) { return this.isComment(line.trim()); } handleSection(ctx, line) { line = line.trim(); if (!this.isSection(line)) { return false; } const section = this.getSection(line); if (REGEXP_IGNORE_KEYS.test(section)) { return false; } if (this.isInheritedSection(line)) { const parentSection = this.getParentSection(line); ctx.ini[section] = JSON.parse(JSON.stringify(ctx.ini[parentSection])); } if (typeof ctx.ini[section] === 'undefined') { ctx.ini[section] = {}; } ctx.current = ctx.ini[section]; return true; } handleSingleLine(ctx, line) { line = line.trim(); if (!this.isSingleLine(line)) { return false; } const { key, value, status } = this.getKeyValue(line); // abort on false of onerror callback if we meet an invalid line if (status === STATUS_INVALID && !this.options.oninvalid(line)) { throw new Error('Abort'); } // skip entry if (status === STATUS_INVALID && !this.options.ignore_invalid) { return true; } const keys = key.split('.'); this.assignValue(ctx.current, keys, value); return true; }}module.exports = Parser; |