diff --git a/src/core/utils/aes.js b/src/core/utils/aes.js new file mode 100644 index 000000000..1c7b6563f --- /dev/null +++ b/src/core/utils/aes.js @@ -0,0 +1,513 @@ +!(function () { + /* + CryptoJS v3.1.2 + code.google.com/p/crypto-js + (c) 2009-2013 by Jeff Mott. All rights reserved. + code.google.com/p/crypto-js/wiki/License + */ + var CryptoJS = CryptoJS || function (u, p) { + var d = {}, l = d.lib = {}, s = function () { + }, t = l.Base = { + extend: function (a) { + s.prototype = this; + var c = new s; + a && c.mixIn(a); + c.hasOwnProperty("init") || (c.init = function () { + c.$super.init.apply(this, arguments); + }); + c.init.prototype = c; + c.$super = this; + return c; + }, create: function () { + var a = this.extend(); + a.init.apply(a, arguments); + return a; + }, init: function () { + }, mixIn: function (a) { + for (var c in a) a.hasOwnProperty(c) && (this[c] = a[c]); + a.hasOwnProperty("toString") && (this.toString = a.toString); + }, clone: function () { + return this.init.prototype.extend(this); + } + }, + r = l.WordArray = t.extend({ + init: function (a, c) { + a = this.words = a || []; + this.sigBytes = c != p ? c : 4 * a.length; + }, toString: function (a) { + return (a || v).stringify(this); + }, concat: function (a) { + var c = this.words, e = a.words, j = this.sigBytes; + a = a.sigBytes; + this.clamp(); + if (j % 4) for (var k = 0; k < a; k++) c[j + k >>> 2] |= (e[k >>> 2] >>> 24 - 8 * (k % 4) & 255) << 24 - 8 * ((j + k) % 4); else if (65535 < e.length) for (k = 0; k < a; k += 4) c[j + k >>> 2] = e[k >>> 2]; else c.push.apply(c, e); + this.sigBytes += a; + return this; + }, clamp: function () { + var a = this.words, c = this.sigBytes; + a[c >>> 2] &= 4294967295 << + 32 - 8 * (c % 4); + a.length = u.ceil(c / 4); + }, clone: function () { + var a = t.clone.call(this); + a.words = this.words.slice(0); + return a; + }, random: function (a) { + for (var c = [], e = 0; e < a; e += 4) c.push(4294967296 * u.random() | 0); + return new r.init(c, a); + } + }), w = d.enc = {}, v = w.Hex = { + stringify: function (a) { + var c = a.words; + a = a.sigBytes; + for (var e = [], j = 0; j < a; j++) { + var k = c[j >>> 2] >>> 24 - 8 * (j % 4) & 255; + e.push((k >>> 4).toString(16)); + e.push((k & 15).toString(16)); + } + return e.join(""); + }, parse: function (a) { + for (var c = a.length, e = [], j = 0; j < c; j += 2) e[j >>> 3] |= parseInt(a.substr(j, + 2), 16) << 24 - 4 * (j % 8); + return new r.init(e, c / 2); + } + }, b = w.Latin1 = { + stringify: function (a) { + var c = a.words; + a = a.sigBytes; + for (var e = [], j = 0; j < a; j++) e.push(String.fromCharCode(c[j >>> 2] >>> 24 - 8 * (j % 4) & 255)); + return e.join(""); + }, parse: function (a) { + for (var c = a.length, e = [], j = 0; j < c; j++) e[j >>> 2] |= (a.charCodeAt(j) & 255) << 24 - 8 * (j % 4); + return new r.init(e, c); + } + }, x = w.Utf8 = { + stringify: function (a) { + try { + return decodeURIComponent(escape(b.stringify(a))); + } catch (c) { + throw Error("Malformed UTF-8 data"); + } + }, parse: function (a) { + return b.parse(unescape(encodeURIComponent(a))); + } + }, + q = l.BufferedBlockAlgorithm = t.extend({ + reset: function () { + this._data = new r.init; + this._nDataBytes = 0; + }, _append: function (a) { + "string" == typeof a && (a = x.parse(a)); + this._data.concat(a); + this._nDataBytes += a.sigBytes; + }, _process: function (a) { + var c = this._data, e = c.words, j = c.sigBytes, k = this.blockSize, b = j / (4 * k), + b = a ? u.ceil(b) : u.max((b | 0) - this._minBufferSize, 0); + a = b * k; + j = u.min(4 * a, j); + if (a) { + for (var q = 0; q < a; q += k) this._doProcessBlock(e, q); + q = e.splice(0, a); + c.sigBytes -= j; + } + return new r.init(q, j); + }, clone: function () { + var a = t.clone.call(this); + a._data = this._data.clone(); + return a; + }, _minBufferSize: 0 + }); + l.Hasher = q.extend({ + cfg: t.extend(), init: function (a) { + this.cfg = this.cfg.extend(a); + this.reset(); + }, reset: function () { + q.reset.call(this); + this._doReset(); + }, update: function (a) { + this._append(a); + this._process(); + return this; + }, finalize: function (a) { + a && this._append(a); + return this._doFinalize(); + }, blockSize: 16, _createHelper: function (a) { + return function (b, e) { + return (new a.init(e)).finalize(b); + }; + }, _createHmacHelper: function (a) { + return function (b, e) { + return (new n.HMAC.init(a, + e)).finalize(b); + }; + } + }); + var n = d.algo = {}; + return d; + }(Math); + (function () { + var u = CryptoJS, p = u.lib.WordArray; + u.enc.Base64 = { + stringify: function (d) { + var l = d.words, p = d.sigBytes, t = this._map; + d.clamp(); + d = []; + for (var r = 0; r < p; r += 3) for (var w = (l[r >>> 2] >>> 24 - 8 * (r % 4) & 255) << 16 | (l[r + 1 >>> 2] >>> 24 - 8 * ((r + 1) % 4) & 255) << 8 | l[r + 2 >>> 2] >>> 24 - 8 * ((r + 2) % 4) & 255, v = 0; 4 > v && r + 0.75 * v < p; v++) d.push(t.charAt(w >>> 6 * (3 - v) & 63)); + if (l = t.charAt(64)) for (; d.length % 4;) d.push(l); + return d.join(""); + }, parse: function (d) { + var l = d.length, s = this._map, t = s.charAt(64); + t && (t = d.indexOf(t), -1 != t && (l = t)); + for (var t = [], r = 0, w = 0; w < + l; w++) if (w % 4) { + var v = s.indexOf(d.charAt(w - 1)) << 2 * (w % 4), b = s.indexOf(d.charAt(w)) >>> 6 - 2 * (w % 4); + t[r >>> 2] |= (v | b) << 24 - 8 * (r % 4); + r++; + } + return p.create(t, r); + }, _map: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=" + }; + })(); + (function (u) { + function p (b, n, a, c, e, j, k) { + b = b + (n & a | ~n & c) + e + k; + return (b << j | b >>> 32 - j) + n; + } + + function d (b, n, a, c, e, j, k) { + b = b + (n & c | a & ~c) + e + k; + return (b << j | b >>> 32 - j) + n; + } + + function l (b, n, a, c, e, j, k) { + b = b + (n ^ a ^ c) + e + k; + return (b << j | b >>> 32 - j) + n; + } + + function s (b, n, a, c, e, j, k) { + b = b + (a ^ (n | ~c)) + e + k; + return (b << j | b >>> 32 - j) + n; + } + + for (var t = CryptoJS, r = t.lib, w = r.WordArray, v = r.Hasher, r = t.algo, b = [], x = 0; 64 > x; x++) b[x] = 4294967296 * u.abs(u.sin(x + 1)) | 0; + r = r.MD5 = v.extend({ + _doReset: function () { + this._hash = new w.init([1732584193, 4023233417, 2562383102, 271733878]); + }, + _doProcessBlock: function (q, n) { + for (var a = 0; 16 > a; a++) { + var c = n + a, e = q[c]; + q[c] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360; + } + var a = this._hash.words, c = q[n + 0], e = q[n + 1], j = q[n + 2], k = q[n + 3], z = q[n + 4], + r = q[n + 5], t = q[n + 6], w = q[n + 7], v = q[n + 8], A = q[n + 9], B = q[n + 10], C = q[n + 11], + u = q[n + 12], D = q[n + 13], E = q[n + 14], x = q[n + 15], f = a[0], m = a[1], g = a[2], h = a[3], + f = p(f, m, g, h, c, 7, b[0]), h = p(h, f, m, g, e, 12, b[1]), g = p(g, h, f, m, j, 17, b[2]), + m = p(m, g, h, f, k, 22, b[3]), f = p(f, m, g, h, z, 7, b[4]), h = p(h, f, m, g, r, 12, b[5]), + g = p(g, h, f, m, t, 17, b[6]), m = p(m, g, h, f, w, 22, b[7]), + f = p(f, m, g, h, v, 7, b[8]), h = p(h, f, m, g, A, 12, b[9]), g = p(g, h, f, m, B, 17, b[10]), + m = p(m, g, h, f, C, 22, b[11]), f = p(f, m, g, h, u, 7, b[12]), h = p(h, f, m, g, D, 12, b[13]), + g = p(g, h, f, m, E, 17, b[14]), m = p(m, g, h, f, x, 22, b[15]), f = d(f, m, g, h, e, 5, b[16]), + h = d(h, f, m, g, t, 9, b[17]), g = d(g, h, f, m, C, 14, b[18]), m = d(m, g, h, f, c, 20, b[19]), + f = d(f, m, g, h, r, 5, b[20]), h = d(h, f, m, g, B, 9, b[21]), g = d(g, h, f, m, x, 14, b[22]), + m = d(m, g, h, f, z, 20, b[23]), f = d(f, m, g, h, A, 5, b[24]), h = d(h, f, m, g, E, 9, b[25]), + g = d(g, h, f, m, k, 14, b[26]), m = d(m, g, h, f, v, 20, b[27]), f = d(f, m, g, h, D, 5, b[28]), + h = d(h, f, + m, g, j, 9, b[29]), g = d(g, h, f, m, w, 14, b[30]), m = d(m, g, h, f, u, 20, b[31]), + f = l(f, m, g, h, r, 4, b[32]), h = l(h, f, m, g, v, 11, b[33]), g = l(g, h, f, m, C, 16, b[34]), + m = l(m, g, h, f, E, 23, b[35]), f = l(f, m, g, h, e, 4, b[36]), h = l(h, f, m, g, z, 11, b[37]), + g = l(g, h, f, m, w, 16, b[38]), m = l(m, g, h, f, B, 23, b[39]), f = l(f, m, g, h, D, 4, b[40]), + h = l(h, f, m, g, c, 11, b[41]), g = l(g, h, f, m, k, 16, b[42]), m = l(m, g, h, f, t, 23, b[43]), + f = l(f, m, g, h, A, 4, b[44]), h = l(h, f, m, g, u, 11, b[45]), g = l(g, h, f, m, x, 16, b[46]), + m = l(m, g, h, f, j, 23, b[47]), f = s(f, m, g, h, c, 6, b[48]), h = s(h, f, m, g, w, 10, b[49]), + g = s(g, h, f, m, + E, 15, b[50]), m = s(m, g, h, f, r, 21, b[51]), f = s(f, m, g, h, u, 6, b[52]), + h = s(h, f, m, g, k, 10, b[53]), g = s(g, h, f, m, B, 15, b[54]), m = s(m, g, h, f, e, 21, b[55]), + f = s(f, m, g, h, v, 6, b[56]), h = s(h, f, m, g, x, 10, b[57]), g = s(g, h, f, m, t, 15, b[58]), + m = s(m, g, h, f, D, 21, b[59]), f = s(f, m, g, h, z, 6, b[60]), h = s(h, f, m, g, C, 10, b[61]), + g = s(g, h, f, m, j, 15, b[62]), m = s(m, g, h, f, A, 21, b[63]); + a[0] = a[0] + f | 0; + a[1] = a[1] + m | 0; + a[2] = a[2] + g | 0; + a[3] = a[3] + h | 0; + }, _doFinalize: function () { + var b = this._data, n = b.words, a = 8 * this._nDataBytes, c = 8 * b.sigBytes; + n[c >>> 5] |= 128 << 24 - c % 32; + var e = u.floor(a / + 4294967296); + n[(c + 64 >>> 9 << 4) + 15] = (e << 8 | e >>> 24) & 16711935 | (e << 24 | e >>> 8) & 4278255360; + n[(c + 64 >>> 9 << 4) + 14] = (a << 8 | a >>> 24) & 16711935 | (a << 24 | a >>> 8) & 4278255360; + b.sigBytes = 4 * (n.length + 1); + this._process(); + b = this._hash; + n = b.words; + for (a = 0; 4 > a; a++) c = n[a], n[a] = (c << 8 | c >>> 24) & 16711935 | (c << 24 | c >>> 8) & 4278255360; + return b; + }, clone: function () { + var b = v.clone.call(this); + b._hash = this._hash.clone(); + return b; + } + }); + t.MD5 = v._createHelper(r); + t.HmacMD5 = v._createHmacHelper(r); + })(Math); + (function () { + var u = CryptoJS, p = u.lib, d = p.Base, l = p.WordArray, p = u.algo, s = p.EvpKDF = d.extend({ + cfg: d.extend({keySize: 4, hasher: p.MD5, iterations: 1}), init: function (d) { + this.cfg = this.cfg.extend(d); + }, compute: function (d, r) { + for (var p = this.cfg, s = p.hasher.create(), b = l.create(), u = b.words, q = p.keySize, p = p.iterations; u.length < q;) { + n && s.update(n); + var n = s.update(d).finalize(r); + s.reset(); + for (var a = 1; a < p; a++) n = s.finalize(n), s.reset(); + b.concat(n); + } + b.sigBytes = 4 * q; + return b; + } + }); + u.EvpKDF = function (d, l, p) { + return s.create(p).compute(d, + l); + }; + })(); + CryptoJS.lib.Cipher || function (u) { + var p = CryptoJS, d = p.lib, l = d.Base, s = d.WordArray, t = d.BufferedBlockAlgorithm, r = p.enc.Base64, + w = p.algo.EvpKDF, v = d.Cipher = t.extend({ + cfg: l.extend(), createEncryptor: function (e, a) { + return this.create(this._ENC_XFORM_MODE, e, a); + }, createDecryptor: function (e, a) { + return this.create(this._DEC_XFORM_MODE, e, a); + }, init: function (e, a, b) { + this.cfg = this.cfg.extend(b); + this._xformMode = e; + this._key = a; + this.reset(); + }, reset: function () { + t.reset.call(this); + this._doReset(); + }, process: function (e) { + this._append(e); + return this._process(); + }, + finalize: function (e) { + e && this._append(e); + return this._doFinalize(); + }, keySize: 4, ivSize: 4, _ENC_XFORM_MODE: 1, _DEC_XFORM_MODE: 2, _createHelper: function (e) { + return { + encrypt: function (b, k, d) { + return ("string" == typeof k ? c : a).encrypt(e, b, k, d); + }, decrypt: function (b, k, d) { + return ("string" == typeof k ? c : a).decrypt(e, b, k, d); + } + }; + } + }); + d.StreamCipher = v.extend({ + _doFinalize: function () { + return this._process(!0); + }, blockSize: 1 + }); + var b = p.mode = {}, x = function (e, a, b) { + var c = this._iv; + c ? this._iv = u : c = this._prevBlock; + for (var d = 0; d < b; d++) e[a + d] ^= + c[d]; + }, q = (d.BlockCipherMode = l.extend({ + createEncryptor: function (e, a) { + return this.Encryptor.create(e, a); + }, createDecryptor: function (e, a) { + return this.Decryptor.create(e, a); + }, init: function (e, a) { + this._cipher = e; + this._iv = a; + } + })).extend(); + q.Encryptor = q.extend({ + processBlock: function (e, a) { + var b = this._cipher, c = b.blockSize; + x.call(this, e, a, c); + b.encryptBlock(e, a); + this._prevBlock = e.slice(a, a + c); + } + }); + q.Decryptor = q.extend({ + processBlock: function (e, a) { + var b = this._cipher, c = b.blockSize, d = e.slice(a, a + c); + b.decryptBlock(e, a); + x.call(this, + e, a, c); + this._prevBlock = d; + } + }); + b = b.CBC = q; + q = (p.pad = {}).Pkcs7 = { + pad: function (a, b) { + for (var c = 4 * b, c = c - a.sigBytes % c, d = c << 24 | c << 16 | c << 8 | c, l = [], n = 0; n < c; n += 4) l.push(d); + c = s.create(l, c); + a.concat(c); + }, unpad: function (a) { + a.sigBytes -= a.words[a.sigBytes - 1 >>> 2] & 255; + } + }; + d.BlockCipher = v.extend({ + cfg: v.cfg.extend({mode: b, padding: q}), reset: function () { + v.reset.call(this); + var a = this.cfg, b = a.iv, a = a.mode; + if (this._xformMode == this._ENC_XFORM_MODE) var c = a.createEncryptor; else c = a.createDecryptor, this._minBufferSize = 1; + this._mode = c.call(a, + this, b && b.words); + }, _doProcessBlock: function (a, b) { + this._mode.processBlock(a, b); + }, _doFinalize: function () { + var a = this.cfg.padding; + if (this._xformMode == this._ENC_XFORM_MODE) { + a.pad(this._data, this.blockSize); + var b = this._process(!0); + } else b = this._process(!0), a.unpad(b); + return b; + }, blockSize: 4 + }); + var n = d.CipherParams = l.extend({ + init: function (a) { + this.mixIn(a); + }, toString: function (a) { + return (a || this.formatter).stringify(this); + } + }), b = (p.format = {}).OpenSSL = { + stringify: function (a) { + var b = a.ciphertext; + a = a.salt; + return (a ? s.create([1398893684, + 1701076831]).concat(a).concat(b) : b).toString(r); + }, parse: function (a) { + a = r.parse(a); + var b = a.words; + if (1398893684 == b[0] && 1701076831 == b[1]) { + var c = s.create(b.slice(2, 4)); + b.splice(0, 4); + a.sigBytes -= 16; + } + return n.create({ciphertext: a, salt: c}); + } + }, a = d.SerializableCipher = l.extend({ + cfg: l.extend({format: b}), encrypt: function (a, b, c, d) { + d = this.cfg.extend(d); + var l = a.createEncryptor(c, d); + b = l.finalize(b); + l = l.cfg; + return n.create({ + ciphertext: b, + key: c, + iv: l.iv, + algorithm: a, + mode: l.mode, + padding: l.padding, + blockSize: a.blockSize, + formatter: d.format + }); + }, + decrypt: function (a, b, c, d) { + d = this.cfg.extend(d); + b = this._parse(b, d.format); + return a.createDecryptor(c, d).finalize(b.ciphertext); + }, _parse: function (a, b) { + return "string" == typeof a ? b.parse(a, this) : a; + } + }), p = (p.kdf = {}).OpenSSL = { + execute: function (a, b, c, d) { + d || (d = s.random(8)); + a = w.create({keySize: b + c}).compute(a, d); + c = s.create(a.words.slice(b), 4 * c); + a.sigBytes = 4 * b; + return n.create({key: a, iv: c, salt: d}); + } + }, c = d.PasswordBasedCipher = a.extend({ + cfg: a.cfg.extend({kdf: p}), encrypt: function (b, c, d, l) { + l = this.cfg.extend(l); + d = l.kdf.execute(d, + b.keySize, b.ivSize); + l.iv = d.iv; + b = a.encrypt.call(this, b, c, d.key, l); + b.mixIn(d); + return b; + }, decrypt: function (b, c, d, l) { + l = this.cfg.extend(l); + c = this._parse(c, l.format); + d = l.kdf.execute(d, b.keySize, b.ivSize, c.salt); + l.iv = d.iv; + return a.decrypt.call(this, b, c, d.key, l); + } + }); + }(); + (function () { + for (var u = CryptoJS, p = u.lib.BlockCipher, d = u.algo, l = [], s = [], t = [], r = [], w = [], v = [], b = [], x = [], q = [], n = [], a = [], c = 0; 256 > c; c++) a[c] = 128 > c ? c << 1 : c << 1 ^ 283; + for (var e = 0, j = 0, c = 0; 256 > c; c++) { + var k = j ^ j << 1 ^ j << 2 ^ j << 3 ^ j << 4, k = k >>> 8 ^ k & 255 ^ 99; + l[e] = k; + s[k] = e; + var z = a[e], F = a[z], G = a[F], y = 257 * a[k] ^ 16843008 * k; + t[e] = y << 24 | y >>> 8; + r[e] = y << 16 | y >>> 16; + w[e] = y << 8 | y >>> 24; + v[e] = y; + y = 16843009 * G ^ 65537 * F ^ 257 * z ^ 16843008 * e; + b[k] = y << 24 | y >>> 8; + x[k] = y << 16 | y >>> 16; + q[k] = y << 8 | y >>> 24; + n[k] = y; + e ? (e = z ^ a[a[a[G ^ z]]], j ^= a[a[j]]) : e = j = 1; + } + var H = [0, 1, 2, 4, 8, + 16, 32, 64, 128, 27, 54], d = d.AES = p.extend({ + _doReset: function () { + for (var a = this._key, c = a.words, d = a.sigBytes / 4, a = 4 * ((this._nRounds = d + 6) + 1), e = this._keySchedule = [], j = 0; j < a; j++) if (j < d) e[j] = c[j]; else { + var k = e[j - 1]; + j % d ? 6 < d && 4 == j % d && (k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255]) : (k = k << 8 | k >>> 24, k = l[k >>> 24] << 24 | l[k >>> 16 & 255] << 16 | l[k >>> 8 & 255] << 8 | l[k & 255], k ^= H[j / d | 0] << 24); + e[j] = e[j - d] ^ k; + } + c = this._invKeySchedule = []; + for (d = 0; d < a; d++) j = a - d, k = d % 4 ? e[j] : e[j - 4], c[d] = 4 > d || 4 >= j ? k : b[l[k >>> 24]] ^ x[l[k >>> 16 & 255]] ^ q[l[k >>> + 8 & 255]] ^ n[l[k & 255]]; + }, encryptBlock: function (a, b) { + this._doCryptBlock(a, b, this._keySchedule, t, r, w, v, l); + }, decryptBlock: function (a, c) { + var d = a[c + 1]; + a[c + 1] = a[c + 3]; + a[c + 3] = d; + this._doCryptBlock(a, c, this._invKeySchedule, b, x, q, n, s); + d = a[c + 1]; + a[c + 1] = a[c + 3]; + a[c + 3] = d; + }, _doCryptBlock: function (a, b, c, d, e, j, l, f) { + for (var m = this._nRounds, g = a[b] ^ c[0], h = a[b + 1] ^ c[1], k = a[b + 2] ^ c[2], n = a[b + 3] ^ c[3], p = 4, r = 1; r < m; r++) var q = d[g >>> 24] ^ e[h >>> 16 & 255] ^ j[k >>> 8 & 255] ^ l[n & 255] ^ c[p++], s = d[h >>> 24] ^ e[k >>> 16 & 255] ^ j[n >>> 8 & 255] ^ l[g & 255] ^ c[p++], t = + d[k >>> 24] ^ e[n >>> 16 & 255] ^ j[g >>> 8 & 255] ^ l[h & 255] ^ c[p++], n = d[n >>> 24] ^ e[g >>> 16 & 255] ^ j[h >>> 8 & 255] ^ l[k & 255] ^ c[p++], g = q, h = s, k = t; + q = (f[g >>> 24] << 24 | f[h >>> 16 & 255] << 16 | f[k >>> 8 & 255] << 8 | f[n & 255]) ^ c[p++]; + s = (f[h >>> 24] << 24 | f[k >>> 16 & 255] << 16 | f[n >>> 8 & 255] << 8 | f[g & 255]) ^ c[p++]; + t = (f[k >>> 24] << 24 | f[n >>> 16 & 255] << 16 | f[g >>> 8 & 255] << 8 | f[h & 255]) ^ c[p++]; + n = (f[n >>> 24] << 24 | f[g >>> 16 & 255] << 16 | f[h >>> 8 & 255] << 8 | f[k & 255]) ^ c[p++]; + a[b] = q; + a[b + 1] = s; + a[b + 2] = t; + a[b + 3] = n; + }, keySize: 8 + }); + u.AES = p._createHelper(d); + })(); + + _.extend(BI, { + /** + * aes 加密方法 + * + * @example + * + * var ciphertext = BI.encrypt("text", "key"); + */ + encrypt: function () { + var encrypted = CryptoJS.AES.encrypt.apply(null, arguments); + return encrypted.toString(); + } + }); +}()); \ No newline at end of file