/* Copyright 2017 Mozilla Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import { CFFCompiler, CFFParser, CFFStrings } from '../../src/core/cff_parser'; import { SEAC_ANALYSIS_ENABLED } from '../../src/core/fonts'; import { Stream } from '../../src/core/stream'; describe('CFFParser', function() { function createWithNullProto(obj) { var result = Object.create(null); for (var i in obj) { result[i] = obj[i]; } return result; } // Stub that returns `0` for any privateDict key. var privateDictStub = { getByName(name) { return 0; }, }; var fontData, parser, cff; beforeAll(function (done) { // This example font comes from the CFF spec: // http://www.adobe.com/content/dam/Adobe/en/devnet/font/pdfs/5176.CFF.pdf var exampleFont = '0100040100010101134142434445462b' + '54696d65732d526f6d616e000101011f' + 'f81b00f81c02f81d03f819041c6f000d' + 'fb3cfb6efa7cfa1605e911b8f1120003' + '01010813183030312e30303754696d65' + '7320526f6d616e54696d657300000002' + '010102030e0e7d99f92a99fb7695f773' + '8b06f79a93fc7c8c077d99f85695f75e' + '9908fb6e8cf87393f7108b09a70adf0b' + 'f78e14'; var fontArr = []; for (var i = 0, ii = exampleFont.length; i < ii; i += 2) { var hex = exampleFont.substr(i, 2); fontArr.push(parseInt(hex, 16)); } fontData = new Stream(fontArr); done(); }); afterAll(function () { fontData = null; }); beforeEach(function (done) { parser = new CFFParser(fontData, {}, SEAC_ANALYSIS_ENABLED); cff = parser.parse(); done(); }); afterEach(function (done) { parser = cff = null; done(); }); it('parses header', function() { var header = cff.header; expect(header.major).toEqual(1); expect(header.minor).toEqual(0); expect(header.hdrSize).toEqual(4); expect(header.offSize).toEqual(1); }); it('parses name index', function() { var names = cff.names; expect(names.length).toEqual(1); expect(names[0]).toEqual('ABCDEF+Times-Roman'); }); it('parses string index', function() { var strings = cff.strings; expect(strings.count).toEqual(3); expect(strings.get(0)).toEqual('.notdef'); expect(strings.get(391)).toEqual('001.007'); }); it('parses top dict', function() { var topDict = cff.topDict; // 391 version 392 FullName 393 FamilyName 389 Weight 28416 UniqueID // -168 -218 1000 898 FontBBox 94 CharStrings 45 102 Private expect(topDict.getByName('version')).toEqual(391); expect(topDict.getByName('FullName')).toEqual(392); expect(topDict.getByName('FamilyName')).toEqual(393); expect(topDict.getByName('Weight')).toEqual(389); expect(topDict.getByName('UniqueID')).toEqual(28416); expect(topDict.getByName('FontBBox')).toEqual([-168, -218, 1000, 898]); expect(topDict.getByName('CharStrings')).toEqual(94); expect(topDict.getByName('Private')).toEqual([45, 102]); }); it('refuses to add topDict key with invalid value (bug 1068432)', function () { var topDict = cff.topDict; var defaultValue = topDict.getByName('UnderlinePosition'); topDict.setByKey(/* [12, 3] = */ 3075, [NaN]); expect(topDict.getByName('UnderlinePosition')).toEqual(defaultValue); }); it('ignores reserved commands in parseDict, and refuses to add privateDict ' + 'keys with invalid values (bug 1308536)', function () { var bytes = new Uint8Array([ 64, 39, 31, 30, 252, 114, 137, 115, 79, 30, 197, 119, 2, 99, 127, 6 ]); parser.bytes = bytes; var topDict = cff.topDict; topDict.setByName('Private', [bytes.length, 0]); var parsePrivateDict = function () { parser.parsePrivateDict(topDict); }; expect(parsePrivateDict).not.toThrow(); var privateDict = topDict.privateDict; expect(privateDict.getByName('BlueValues')).toBeNull(); }); it('parses a CharString having cntrmask', function() { var bytes = new Uint8Array([0, 1, // count 1, // offsetSize 0, // offset[0] 38, // end 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 1, // hstem 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 3, // vstem 20, // cntrmask 22, 22, // fail if misparsed as hmoveto 14 // endchar ]); parser.bytes = bytes; var charStringsIndex = parser.parseIndex(0).obj; var charStrings = parser.parseCharStrings({ charStrings: charStringsIndex, privateDict: privateDictStub, }).charStrings; expect(charStrings.count).toEqual(1); // shoudn't be sanitized expect(charStrings.get(0).length).toEqual(38); }); it('parses a CharString endchar with 4 args w/seac enabled', function() { var parser = new CFFParser(fontData, {}, /* seacAnalysisEnabled = */ true); parser.parse(); // cff var bytes = new Uint8Array([0, 1, // count 1, // offsetSize 0, // offset[0] 237, 247, 22, 247, 72, 204, 247, 86, 14]); parser.bytes = bytes; var charStringsIndex = parser.parseIndex(0).obj; var result = parser.parseCharStrings({ charStrings: charStringsIndex, privateDict: privateDictStub, }); expect(result.charStrings.count).toEqual(1); expect(result.charStrings.get(0).length).toEqual(1); expect(result.seacs.length).toEqual(1); expect(result.seacs[0].length).toEqual(4); expect(result.seacs[0][0]).toEqual(130); expect(result.seacs[0][1]).toEqual(180); expect(result.seacs[0][2]).toEqual(65); expect(result.seacs[0][3]).toEqual(194); }); it('parses a CharString endchar with 4 args w/seac disabled', function() { var parser = new CFFParser(fontData, {}, /* seacAnalysisEnabled = */ false); parser.parse(); // cff var bytes = new Uint8Array([0, 1, // count 1, // offsetSize 0, // offset[0] 237, 247, 22, 247, 72, 204, 247, 86, 14]); parser.bytes = bytes; var charStringsIndex = parser.parseIndex(0).obj; var result = parser.parseCharStrings({ charStrings: charStringsIndex, privateDict: privateDictStub, }); expect(result.charStrings.count).toEqual(1); expect(result.charStrings.get(0).length).toEqual(9); expect(result.seacs.length).toEqual(0); }); it('parses a CharString endchar no args', function() { var bytes = new Uint8Array([0, 1, // count 1, // offsetSize 0, // offset[0] 14]); parser.bytes = bytes; var charStringsIndex = parser.parseIndex(0).obj; var result = parser.parseCharStrings({ charStrings: charStringsIndex, privateDict: privateDictStub, }); expect(result.charStrings.count).toEqual(1); expect(result.charStrings.get(0)[0]).toEqual(14); expect(result.seacs.length).toEqual(0); }); it('parses predefined charsets', function() { var charset = parser.parseCharsets(0, 0, null, true); expect(charset.predefined).toEqual(true); }); it('parses charset format 0', function() { // The first three bytes make the offset large enough to skip predefined. var bytes = new Uint8Array([0x00, 0x00, 0x00, 0x00, // format 0x00, 0x02 // sid/cid ]); parser.bytes = bytes; var charset = parser.parseCharsets(3, 2, new CFFStrings(), false); expect(charset.charset[1]).toEqual('exclam'); // CID font charset = parser.parseCharsets(3, 2, new CFFStrings(), true); expect(charset.charset[1]).toEqual(2); }); it('parses charset format 1', function() { // The first three bytes make the offset large enough to skip predefined. var bytes = new Uint8Array([0x00, 0x00, 0x00, 0x01, // format 0x00, 0x08, // sid/cid start 0x01 // sid/cid left ]); parser.bytes = bytes; var charset = parser.parseCharsets(3, 2, new CFFStrings(), false); expect(charset.charset).toEqual(['.notdef', 'quoteright', 'parenleft']); // CID font charset = parser.parseCharsets(3, 2, new CFFStrings(), true); expect(charset.charset).toEqual(['.notdef', 8, 9]); }); it('parses charset format 2', function() { // format 2 is the same as format 1 but the left is card16 // The first three bytes make the offset large enough to skip predefined. var bytes = new Uint8Array([0x00, 0x00, 0x00, 0x02, // format 0x00, 0x08, // sid/cid start 0x00, 0x01 // sid/cid left ]); parser.bytes = bytes; var charset = parser.parseCharsets(3, 2, new CFFStrings(), false); expect(charset.charset).toEqual(['.notdef', 'quoteright', 'parenleft']); // CID font charset = parser.parseCharsets(3, 2, new CFFStrings(), true); expect(charset.charset).toEqual(['.notdef', 8, 9]); }); it('parses encoding format 0', function() { // The first two bytes make the offset large enough to skip predefined. var bytes = new Uint8Array([0x00, 0x00, 0x00, // format 0x01, // count 0x08 // start ]); parser.bytes = bytes; var encoding = parser.parseEncoding(2, {}, new CFFStrings(), null); expect(encoding.encoding).toEqual(createWithNullProto({ 0x8: 1, })); }); it('parses encoding format 1', function() { // The first two bytes make the offset large enough to skip predefined. var bytes = new Uint8Array([0x00, 0x00, 0x01, // format 0x01, // num ranges 0x07, // range1 start 0x01 // range2 left ]); parser.bytes = bytes; var encoding = parser.parseEncoding(2, {}, new CFFStrings(), null); expect(encoding.encoding).toEqual( createWithNullProto({ 0x7: 0x01, 0x08: 0x02, })); }); it('parses fdselect format 0', function() { var bytes = new Uint8Array([0x00, // format 0x00, // gid: 0 fd: 0 0x01 // gid: 1 fd: 1 ]); parser.bytes = bytes.slice(); var fdSelect = parser.parseFDSelect(0, 2); expect(fdSelect.fdSelect).toEqual([0, 1]); expect(fdSelect.raw).toEqual(bytes); }); it('parses fdselect format 3', function() { var bytes = new Uint8Array([0x03, // format 0x00, 0x02, // range count 0x00, 0x00, // first gid 0x09, // font dict 1 id 0x00, 0x02, // next gid 0x0a, // font dict 2 id 0x00, 0x04 // sentinel (last gid) ]); parser.bytes = bytes.slice(); var fdSelect = parser.parseFDSelect(0, 4); expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]); expect(fdSelect.raw).toEqual(bytes); }); it('parses invalid fdselect format 3 (bug 1146106)', function() { var bytes = new Uint8Array([0x03, // format 0x00, 0x02, // range count 0x00, 0x01, // first gid (invalid) 0x09, // font dict 1 id 0x00, 0x02, // next gid 0x0a, // font dict 2 id 0x00, 0x04 // sentinel (last gid) ]); parser.bytes = bytes.slice(); var fdSelect = parser.parseFDSelect(0, 4); expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]); bytes[3] = bytes[4] = 0x00; // The adjusted first range, first gid. expect(fdSelect.raw).toEqual(bytes); }); // TODO fdArray }); describe('CFFCompiler', function() { function testParser(bytes) { bytes = new Uint8Array(bytes); return new CFFParser({ getBytes: () => { return bytes; }, }, {}, SEAC_ANALYSIS_ENABLED); } it('encodes integers', function() { var c = new CFFCompiler(); // all the examples from the spec expect(c.encodeInteger(0)).toEqual([0x8b]); expect(c.encodeInteger(100)).toEqual([0xef]); expect(c.encodeInteger(-100)).toEqual([0x27]); expect(c.encodeInteger(1000)).toEqual([0xfa, 0x7c]); expect(c.encodeInteger(-1000)).toEqual([0xfe, 0x7c]); expect(c.encodeInteger(10000)).toEqual([0x1c, 0x27, 0x10]); expect(c.encodeInteger(-10000)).toEqual([0x1c, 0xd8, 0xf0]); expect(c.encodeInteger(100000)).toEqual([0x1d, 0x00, 0x01, 0x86, 0xa0]); expect(c.encodeInteger(-100000)).toEqual([0x1d, 0xff, 0xfe, 0x79, 0x60]); }); it('encodes floats', function() { var c = new CFFCompiler(); expect(c.encodeFloat(-2.25)).toEqual([0x1e, 0xe2, 0xa2, 0x5f]); expect(c.encodeFloat(5e-11)).toEqual([0x1e, 0x5c, 0x11, 0xff]); }); it('sanitizes name index', function() { var c = new CFFCompiler(); var nameIndexCompiled = c.compileNameIndex(['[a']); var parser = testParser(nameIndexCompiled); var nameIndex = parser.parseIndex(0); var names = parser.parseNameIndex(nameIndex.obj); expect(names).toEqual(['_a']); var longName = ''; for (var i = 0; i < 129; i++) { longName += '_'; } nameIndexCompiled = c.compileNameIndex([longName]); parser = testParser(nameIndexCompiled); nameIndex = parser.parseIndex(0); names = parser.parseNameIndex(nameIndex.obj); expect(names[0].length).toEqual(127); }); // TODO a lot more compiler tests });