/*
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The MIT License (MIT)
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Copyright (c) 2007-2018 Einar Lielmanis, Liam Newman, and contributors.
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge,
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publish, distribute, sublicense, and/or sell copies of the Software,
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and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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//
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// Unpacker for Dean Edward's p.a.c.k.e.r, a part of javascript beautifier
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//
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// Coincidentally, it can defeat a couple of other eval-based compressors.
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//
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// usage:
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//
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// if (P_A_C_K_E_R.detect(some_string)) {
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// var unpacked = P_A_C_K_E_R.unpack(some_string);
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// }
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//
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//
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/*jshint strict:false */
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var P_A_C_K_E_R = {
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detect: function(str) {
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return (P_A_C_K_E_R.get_chunks(str).length > 0);
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},
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get_chunks: function(str) {
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var chunks = str.match(/eval\(\(?function\(.*?(,0,\{\}\)\)|split\('\|'\)\)\))($|\n)/g);
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return chunks ? chunks : [];
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},
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unpack: function(str) {
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var chunks = P_A_C_K_E_R.get_chunks(str),
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chunk;
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for (var i = 0; i < chunks.length; i++) {
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chunk = chunks[i].replace(/\n$/, '');
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str = str.split(chunk).join(P_A_C_K_E_R.unpack_chunk(chunk));
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}
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return str;
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},
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unpack_chunk: function(str) {
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var unpacked_source = '';
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var __eval = eval;
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if (P_A_C_K_E_R.detect(str)) {
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try {
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eval = function(s) { // jshint ignore:line
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unpacked_source += s;
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return unpacked_source;
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}; // jshint ignore:line
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__eval(str);
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if (typeof unpacked_source === 'string' && unpacked_source) {
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str = unpacked_source;
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}
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} catch (e) {
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// well, it failed. we'll just return the original, instead of crashing on user.
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}
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}
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eval = __eval; // jshint ignore:line
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return str;
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},
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run_tests: function(sanity_test) {
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var t = sanity_test || new SanityTest();
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var pk1 = "eval(function(p,a,c,k,e,r){e=String;if(!''.replace(/^/,String)){while(c--)r[c]=k[c]||c;k=[function(e){return r[e]}];e=function(){return'\\\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\\\b'+e(c)+'\\\\b','g'),k[c]);return p}('0 2=1',3,3,'var||a'.split('|'),0,{}))";
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var unpk1 = 'var a=1';
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var pk2 = "eval(function(p,a,c,k,e,r){e=String;if(!''.replace(/^/,String)){while(c--)r[c]=k[c]||c;k=[function(e){return r[e]}];e=function(){return'\\\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\\\b'+e(c)+'\\\\b','g'),k[c]);return p}('0 2=1',3,3,'foo||b'.split('|'),0,{}))";
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var unpk2 = 'foo b=1';
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var pk_broken = "eval(function(p,a,c,k,e,r){BORKBORK;if(!''.replace(/^/,String)){while(c--)r[c]=k[c]||c;k=[function(e){return r[e]}];e=function(){return'\\\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\\\b'+e(c)+'\\\\b','g'),k[c]);return p}('0 2=1',3,3,'var||a'.split('|'),0,{}))";
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var pk3 = "eval(function(p,a,c,k,e,r){e=String;if(!''.replace(/^/,String)){while(c--)r[c]=k[c]||c;k=[function(e){return r[e]}];e=function(){return'\\\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\\\b'+e(c)+'\\\\b','g'),k[c]);return p}('0 2=1{}))',3,3,'var||a'.split('|'),0,{}))";
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var unpk3 = 'var a=1{}))';
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t.test_function(P_A_C_K_E_R.detect, "P_A_C_K_E_R.detect");
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t.expect('', false);
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t.expect('var a = b', false);
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t.test_function(P_A_C_K_E_R.unpack, "P_A_C_K_E_R.unpack");
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t.expect(pk_broken, pk_broken);
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t.expect(pk1, unpk1);
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t.expect(pk2, unpk2);
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t.expect(pk3, unpk3);
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t.expect("function test (){alert ('This is a test!')}; " +
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"eval(function(p,a,c,k,e,r){e=String;if(!''.replace(/^/,String))" +
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"{while(c--)r[c]=k[c]||c;k=[function(e){return r[e]}];e=function" +
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"(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp(" +
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"'\\b'+e(c)+'\\b','g'),k[c]);return p}('0 2=\\\'{Íâ–+›ï;ã†Ù¥#\\\'',3,3," +
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"'var||a'.split('|'),0,{}))",
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"function test (){alert ('This is a test!')}; var a='{Íâ–+›ï;ã†Ù¥#'");
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var filler = '\nfiller\n';
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t.expect(filler + pk1 + "\n" + pk_broken + filler + pk2 + filler, filler + unpk1 + "\n" + pk_broken + filler + unpk2 + filler);
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return t;
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}
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};
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