/* Guardian Legend password generator / decoder * Copyright (C) 1992,2004 Joel Yliluoma (http://iki.fi/bisqwit/) * Written for http://tasvideos.org/PasswordGenerators.html * Permission to copy and modify is granted under the following terms: * The copyright notice is kept unmodified * No attempts are made to prevent anyone downloading the source code * * Reverse engineering by TNSe */ function glinput(name) { this.gel = function(id) { return document.getElementById(name+id) } this.id = function(id) { return this.gel(id).selectedIndex } this.ids = function(id,v) { this.gel(id).selectedIndex=v } this.ch = function(id) { return this.gel(id).checked?1:0 } this.chs = function(id,v) { this.gel(id).checked = v>0 } this.tx = function(id) { return this.gel(id).value } this.txs = function(id,v) { this.gel(id).value = v } /* 24 * 8-bit values {1,2,3,4,5,6,7,8}{A,B,C} */ this.bytes = [0,0,0, 0,0,0, 0,0,0, 0,0,0, 0,0,0, 0,0,0, 0,0,0, 0,0,0] /* 32 * 6-bit encoded values */ this.chars = [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0] /* Length: 64 characters */ /* 0123456789ABCDEF 0123456789ABCDEF 0123456789ABCDEF 0123456789ABCDEF */ this.cset = 'ABCDEFGHIJKLMNOP'+'QRSTUVWXYZ0123ab'+'cdefghijklmnopqr'+'stuvwxyz456789!?' this.swap2 = [0, 2, 1, 3] this.swap3 = [0, 4, 2, 6, 1, 5, 3, 7] this.swap4 = [0,8,4,12, 2,10,6,14, 1,9,5,13, 3,11,7,15] this.inputs = [ /*1F*/ 1, 'b00', 1, 'b01', 1, 'b02', 1, 'b03',1, 'b04', 1, 'b05',1, 'b06', 1, 'b07', /*1G*/ 1, 'b08', 1, 'b09', 1, 'b0A', 1, 'b0B',1, 'b0C', 1, 'b0D',1, 'b0E', 1, 'b0F', /*1H*/ 1, 'b10', 1, 'b11', 1, 'b12', 1, 'b13',1, 'b14', 1, 'b15',1, 'b16', 1, 'b17', /*2F*/ 1, 'b18', 1, 'b19', 1, 'b1A', 1, 'b1B',1, 'b1C', 1, 'b1D',1, 'b1E', 1, 'b1F', /*2G*/ 1, 'b20', 1, 'b21', 1, 'b22', 1, 'b23',1, 'b24', 1, 'b25',1, 'b26', 1, 'b27', /*2H*/ 1, 'b28', 1, 'b29', 1, 'b2A', 1, 'b2B',1, 'b2C', 1, 'b2D',1, 'b2E', 1, 'b2F', /*3F*/ 1, 'b30', 1, 'b31', 1, 'b32', 1, 'b33',1, 'b34', 1, 'b35',1, 'b36', 1, 'b37', /*3G*/ 1, 'b38', 1, 'b39', 1, 'b3A', 1, 'b3B',1, 'b3C', 1, 'b3D',1, 'b3E', 1, 'b3F', /*3H*/ 4, 'chip',15, 0,1, 1, 'b44', 1, 'b45', 1, 'b46', 1, 'b47', /*4F*/ 1, 'c1', 1, 'c2', 1, 'c3', 1, 'c4', 1, 'c5', 1, 'c6', 1, 'c7', 1, 'c8', /*4G*/ 1, 'c9', 1, 'c10', 1, 'c11', 1, 'c12',1, 'c13', 1, 'c14',1, 'c15', 1, 'c16', /*4H*/ 2, 'score_low', 3, 8,0, 2, 'score_high',3, 8,0, 1, 'c17', 1, 'c18', 1, 'c19', 1, 'c20', /*5F*/ 2, 'w0',3,0,0, 2, 'w1',3,0,0, 2, 'w2',3,0,0, 2, 'w3',3,0,0, /*5G*/ 2, 'w4',3,0,0, 2, 'w5',3,0,0, 2, 'w6',3,0,0, 2, 'w7',3,0,0, /*5H*/ 2, 'w8',3,0,0, 2, 'w9',3,0,0, 2,'w10',3,0,0, 2,'w11',1,0,0, /*6F*/ 8,'ammo',255, 0,0, /*6G*/ 1, 'k1', 1, 'k2', 1, 'k3', 1, 'k4', 1, 'k5', 1, 'k6', 1, 'k7', 1, 'k8', /*6H*/ 3, 'fr',5, 0,1, /* fire rate 0..5 */ 5, 'sa',31, 0,0, /* shield amount 0..31 (0 appears as 32) */ /*7F*/ 3, 'ws',7, 0,1, /* weapon strength 0..7, all appear as +1 */ 5, 'lx',23, 0,0, /* x coordinate 0..23 */ /*7G*/ 3, 'ss',7, 0,1, /* shield strength 0..7, 0 can't technically happen */ 5, 'ly',23, 0,0, /* y coordinate 0..23 */ /*7H*/ 8, 'score_high',255, 0,0, /*8F*/ 8, 'score_low', 255, 0,0 ] this.xorvalue = 0 this.convert_bits = function(input, ib, ob) { cache=0 cachelen=0 result = [] nm = input.length obm = (1 << ob) - 1 for(n=0; n= ob) { result.push(cache & obm) cachelen -= ob cache >>= ob } } return result } this.bhex = function(ch) { tmp = '0123456789ABCDEF' return tmp[ch >> 4] + tmp[ch & 15] } this.showpass = function() { s = '' t = this.cset for(n=0; n<32; ++n) { i = this.chars[n] ch = t.charAt(i) s += ch /* Support for combining characters appears to be generally bad. */ /* X11 can't render them properly. * They overflow the inputbox length limit. And so on... */ if(0 && ch >= 'a' && ch <= 'z') s += '̈'; /* combining " character U+0308 */ if((n%4)==3) s += ' '; if((n%16)==7) s += ' '; if(n==15) { this.txs('l1', s); s=''; } if(n==31) { this.txs('l2', s); s=''; } } } this.decode = function() { error = 0 message = '' /* Get user input (32 6-bit characters) */ l1 = this.tx('l1') l2 = this.tx('l2') t = this.cset this.chars = [] for(n=0; n= 0) this.chars.push(ch & 63) } for(n=0; n= 0) this.chars.push(ch & 63) } /* convert 6-bit to 8-bit */ this.bytes = this.convert_bits(this.chars, 6, 8) this.xorvalue = this.bytes[23] this.do_xorring() /* dexor */ chksum = this.bytes[22] chksum_shouldbe = this.calc_checksum() if(chksum != chksum_shouldbe) { error = 1 message += '(chsum '+chksum+' should be '+chksum_shouldbe+')' } score_low = 0 score_high = 0 bytepos=0 bitpos =0 b=this.inputs.length for(a=0; a> bitpos) & ((1 << thisbits)-1) if(thisbits == 1) { this.chs(fname, value) } else { maxvalue = this.inputs[a++] if(value > maxvalue) { error = 1 message += '(range)' value = maxvalue } value <<= this.inputs[a++] if(this.inputs[a++]) switch(thisbits) { case 2: value = this.swap2[value]; break; case 3: value = this.swap3[value]; break; case 4: value = this.swap4[value]; break; } if(fname == 'score_low') score_low |= value; else if(fname == 'score_high') score_high |= value; else this.ids(fname, value) } bitpos += thisbits if(bitpos == 8) { bitpos=0; ++bytepos; } } this.txs('score', 10 * (score_low + score_high*1000)) this.ids('xor', this.xorvalue) if(error) message = '(error)' + message this.txs('msg', message) } this.calc_checksum = function() { a=0; for(n=0; n<22; ++n) { a += this.bytes[n]; if(a>255) a -= 255; } return (a + this.xorvalue) & 255 } this.do_xorring = function() { for(n=0; n<23; ++n) this.bytes[n] ^= (this.xorvalue + 0x1D - n) & 255; } this.setup = function() { for(n=0; n<24; ++n) this.bytes[n] = 0 this.xorvalue = this.id('xor') score = 0 + this.tx('score') /* strip the last digit */ score = (score - (score%10)) / 10 score_low = score % 1000 score_high = (score - score_low) / 1000 bytepos=0 bitpos =0 b=this.inputs.length for(a=0; a>= this.inputs[a++] value &= (1 << thisbits) - 1; if(this.inputs[a++]) switch(thisbits) { case 2: value = this.swap2[value]; break; case 3: value = this.swap3[value]; break; case 4: value = this.swap4[value]; break; } this.bytes[bytepos] |= value << bitpos } bitpos += thisbits if(bitpos == 8) { bitpos=0; ++bytepos; } } this.bytes[23] = this.xorvalue this.bytes[22] = this.calc_checksum() this.do_xorring() /* convert 8-bit to 6-bit */ this.chars = this.convert_bits(this.bytes, 8, 6) this.showpass() this.decode() } }