openpgp/dist/lightweight/unbzip2-stream.min.mjs.map

OpenPGP.js is a Javascript implementation of the OpenPGP protocol. This is defined in RFC 4880.

{"version":3,"file":"unbzip2-stream.min.mjs","sources":["../../node_modules/@openpgp/unbzip2-stream/index.js","../../node_modules/@openpgp/unbzip2-stream/lib/bzip2.js","../../node_modules/@openpgp/unbzip2-stream/lib/bit_iterator.js"],"sourcesContent":["const bz2 = require('./lib/bzip2');\nconst bitIterator = require('./lib/bit_iterator');\n\nmodule.exports = unbzip2Stream;\n\nfunction unbzip2Stream(input) {\n    const bufferQueue = [];\n    let hasBytes = 0;\n    let blockSize = 0;\n    let broken = false;\n    let hasAllData = false;\n    let bitReader = null;\n    let streamCRC = null;\n\n    function decompressBlock(push){\n        if(!blockSize) {\n            blockSize = bz2.header(bitReader);\n            //console.error(\"got header of\", blockSize);\n            streamCRC = 0;\n            return false;\n        } else {\n            const bufsize = 100000 * blockSize;\n            const buf = new Int32Array(bufsize);\n\n            const chunk = [];\n            const f = function(b) {\n                chunk.push(b);\n            };\n\n            streamCRC = bz2.decompress(bitReader, f, buf, bufsize, streamCRC);\n            if (streamCRC === null) {\n                // reset for next bzip2 header\n                blockSize = 0;\n                return false;\n            } else {\n                //console.error('decompressed', chunk.length,'bytes');\n                push(new Uint8Array(chunk));\n                return true;\n            }\n        }\n    }\n\n    let outlength = 0;\n    function decompressAndQueue(controller) {\n        if (broken) return;\n        try {\n            return decompressBlock(function(d) {\n                controller.enqueue(d);\n                if (d !== null) {\n                    //console.error('write at', outlength.toString(16));\n                    outlength += d.length;\n                } else {\n                    //console.error('written EOS');\n                }\n            });\n        } catch(e) {\n            //console.error(e);\n            controller.error(e);\n            broken = true;\n            return true;\n        }\n    }\n\n    let inputReader;\n    return new ReadableStream({\n        start() {\n            inputReader = input.getReader();\n        },\n        async pull(controller) {\n            try {\n                while (true) {\n                    while (!(\n                        hasAllData ||\n                            (\n                                bitReader &&\n                                hasBytes - bitReader.bytesRead + 1 >= 25000 + 100000 * (blockSize || 4)\n                            )\n                    )) {\n                        const { value, done } = await inputReader.read();\n                        if (!done) {\n                            bufferQueue.push(value);\n                            hasBytes += value.length;\n                            if (bitReader === null) {\n                                bitReader = bitIterator(function() {\n                                    return bufferQueue.shift();\n                                });\n                            }\n                        } else {\n                            hasAllData = true;\n                        }\n                    }\n                    while (\n                        hasAllData ?\n                            (bitReader && hasBytes > bitReader.bytesRead) :\n                            (\n                                bitReader &&\n                                hasBytes - bitReader.bytesRead + 1 >= 25000 + 100000 * (blockSize || 4)\n                            )\n                    ) {\n                        //console.error('decompressing with', hasBytes - bitReader.bytesRead + 1, 'bytes in buffer');\n                        if (decompressAndQueue(controller)) {\n                            return; // `pull` will get called again\n                        }\n                    }\n                    if (hasAllData && !broken && (!bitReader || hasBytes <= bitReader.bytesRead)) {\n                        if (streamCRC === null) {\n                            controller.close();\n                        } else {\n                            controller.error(new Error(\"input stream ended prematurely\"));\n                        }\n                        return;\n                    }\n                }\n            } catch (e) {\n                controller.error(e);\n            }\n        },\n        async cancel(reason) {\n            await inputReader.abort(reason);\n        }\n    }, { highWaterMark: 0 });\n}\n","/* \n  bzip2.js - a small bzip2 decompression implementation\n  \n  Copyright 2011 by antimatter15 (antimatter15@gmail.com)\n  \n  Based on micro-bunzip by Rob Landley (rob@landley.net).\n\n  Copyright (c) 2011 by antimatter15 (antimatter15@gmail.com).\n\n  Permission is hereby granted, free of charge, to any person obtaining a\n  copy of this software and associated documentation files (the \"Software\"),\n  to deal in the Software without restriction, including without limitation\n  the rights to use, copy, modify, merge, publish, distribute, sublicense,\n  and/or sell copies of the Software, and to permit persons to whom the\n  Software is furnished to do so, subject to the following conditions:\n  \n  The above copyright notice and this permission notice shall be included\n  in all copies or substantial portions of the Software.\n  \n  THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.\n  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,\n  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH\n  THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\n*/\nfunction Bzip2Error(message) {\n    this.name = 'Bzip2Error';\n    this.message = message;\n    this.stack = (new Error()).stack;\n}\nBzip2Error.prototype = new Error;\n \nvar message = {\n    Error: function(message) {throw new Bzip2Error(message);}\n};\n\nvar bzip2 = {};\nbzip2.Bzip2Error = Bzip2Error;\n\nbzip2.crcTable =\n[\n   0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9,\n   0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,\n   0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,\n   0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,\n   0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,\n   0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,\n   0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,\n   0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,\n   0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,\n   0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,\n   0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,\n   0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,\n   0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49,\n   0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,\n   0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,\n   0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,\n   0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,\n   0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,\n   0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,\n   0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,\n   0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,\n   0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,\n   0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,\n   0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,\n   0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,\n   0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,\n   0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,\n   0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,\n   0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,\n   0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,\n   0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,\n   0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,\n   0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,\n   0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,\n   0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,\n   0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,\n   0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,\n   0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,\n   0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,\n   0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,\n   0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,\n   0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,\n   0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,\n   0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,\n   0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,\n   0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,\n   0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,\n   0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,\n   0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,\n   0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,\n   0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,\n   0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,\n   0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,\n   0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,\n   0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,\n   0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,\n   0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,\n   0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,\n   0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,\n   0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,\n   0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,\n   0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,\n   0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,\n   0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4\n];\n\nbzip2.array = function(bytes) {\n    var bit = 0, byte = 0;\n    var BITMASK = [0, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF ];\n    return function(n) {\n        var result = 0;\n        while(n > 0) {\n            var left = 8 - bit;\n            if (n >= left) {\n                result <<= left;\n                result |= (BITMASK[left] & bytes[byte++]);\n                bit = 0;\n                n -= left;\n            } else {\n                result <<= n;\n                result |= ((bytes[byte] & (BITMASK[n] << (8 - n - bit))) >> (8 - n - bit));\n                bit += n;\n                n = 0;\n            }\n        }\n        return result;\n    }\n}\n\n    \nbzip2.simple = function(srcbuffer, stream) {\n    var bits = bzip2.array(srcbuffer);\n    var size = bzip2.header(bits);\n    var ret = false;\n    var bufsize = 100000 * size;\n    var buf = new Int32Array(bufsize);\n    \n    do {\n        ret = bzip2.decompress(bits, stream, buf, bufsize);        \n    } while(!ret);\n}\n\nbzip2.header = function(bits) {\n    this.byteCount = new Int32Array(256);\n    this.symToByte = new Uint8Array(256);\n    this.mtfSymbol = new Int32Array(256);\n    this.selectors = new Uint8Array(0x8000);\n\n    if (bits(8*3) != 4348520) message.Error(\"No magic number found\");\n\n    var i = bits(8) - 48;\n    if (i < 1 || i > 9) message.Error(\"Not a BZIP archive\");\n    return i;\n};\n\n\n//takes a function for reading the block data (starting with 0x314159265359)\n//a block size (0-9) (optional, defaults to 9)\n//a length at which to stop decompressing and return the output\nbzip2.decompress = function(bits, stream, buf, bufsize, streamCRC) {\n    var MAX_HUFCODE_BITS = 20;\n    var MAX_SYMBOLS = 258;\n    var SYMBOL_RUNA = 0;\n    var SYMBOL_RUNB = 1;\n    var GROUP_SIZE = 50;\n    var crc = 0 ^ (-1);\n    \n    for(var h = '', i = 0; i < 6; i++) h += bits(8).toString(16);\n    if (h == \"177245385090\") {\n      var finalCRC = bits(32)|0;\n      if (finalCRC !== streamCRC) message.Error(\"Error in bzip2: crc32 do not match\");\n      // align stream to byte\n      bits(null);\n      return null; // reset streamCRC for next call\n    }\n    if (h != \"314159265359\") message.Error(\"Invalid bzip data\");\n    var crcblock = bits(32)|0; // CRC code\n    if (bits(1)) message.Error(\"unsupported obsolete version\");\n    var origPtr = bits(24);\n    if (origPtr > bufsize) message.Error(\"Initial position larger than buffer size\");\n    var t = bits(16);\n    var symTotal = 0;\n    for (i = 0; i < 16; i++) {\n        if (t & (1 << (15 - i))) {\n            var k = bits(16);\n            for(j = 0; j < 16; j++) {\n                if (k & (1 << (15 - j))) {\n                    this.symToByte[symTotal++] = (16 * i) + j;\n                }\n            }\n        }\n    }\n\n    var groupCount = bits(3);\n    if (groupCount < 2 || groupCount > 6) message.Error(\"Invalid bzip data\");\n    var nSelectors = bits(15);\n    if (nSelectors == 0) message.Error(\"Invalid bzip data\");\n    for(var i = 0; i < groupCount; i++) this.mtfSymbol[i] = i;\n\n    for(var i = 0; i < nSelectors; i++) {\n        for(var j = 0; bits(1); j++) if (j >= groupCount) message.Error(\"Invalid bzip data\");\n        var uc = this.mtfSymbol[j];\n        for(var k = j-1; k>=0; k--) {\n            this.mtfSymbol[k+1] = this.mtfSymbol[k];\n        }\n        this.mtfSymbol[0] = uc;\n        this.selectors[i] = uc;\n    }\n\n    var symCount = symTotal + 2;\n    var groups = [];\n    var length = new Uint8Array(MAX_SYMBOLS),\n    temp = new Uint16Array(MAX_HUFCODE_BITS+1);\n\n    var hufGroup;\n\n    for(var j = 0; j < groupCount; j++) {\n        t = bits(5); //lengths\n        for(var i = 0; i < symCount; i++) {\n            while(true){\n                if (t < 1 || t > MAX_HUFCODE_BITS) message.Error(\"Invalid bzip data\");\n                if (!bits(1)) break;\n                if (!bits(1)) t++;\n                else t--;\n            }\n            length[i] = t;\n        }\n        var  minLen,  maxLen;\n        minLen = maxLen = length[0];\n        for(var i = 1; i < symCount; i++) {\n            if (length[i] > maxLen) maxLen = length[i];\n            else if (length[i] < minLen) minLen = length[i];\n        }\n        hufGroup = groups[j] = {};\n        hufGroup.permute = new Int32Array(MAX_SYMBOLS);\n        hufGroup.limit = new Int32Array(MAX_HUFCODE_BITS + 1);\n        hufGroup.base = new Int32Array(MAX_HUFCODE_BITS + 1);\n\n        hufGroup.minLen = minLen;\n        hufGroup.maxLen = maxLen;\n        var base = hufGroup.base;\n        var limit = hufGroup.limit;\n        var pp = 0;\n        for(var i = minLen; i <= maxLen; i++)\n        for(var t = 0; t < symCount; t++)\n        if (length[t] == i) hufGroup.permute[pp++] = t;\n        for(i = minLen; i <= maxLen; i++) temp[i] = limit[i] = 0;\n        for(i = 0; i < symCount; i++) temp[length[i]]++;\n        pp = t = 0;\n        for(i = minLen; i < maxLen; i++) {\n            pp += temp[i];\n            limit[i] = pp - 1;\n            pp <<= 1;\n            base[i+1] = pp - (t += temp[i]);\n        }\n        limit[maxLen] = pp + temp[maxLen] - 1;\n        base[minLen] = 0;\n    }\n\n    for(var i = 0; i < 256; i++) { \n        this.mtfSymbol[i] = i;\n        this.byteCount[i] = 0;\n    }\n    var runPos, count, symCount, selector;\n    runPos = count = symCount = selector = 0;    \n    while(true) {\n        if (!(symCount--)) {\n            symCount = GROUP_SIZE - 1;\n            if (selector >= nSelectors) message.Error(\"Invalid bzip data\");\n            hufGroup = groups[this.selectors[selector++]];\n            base = hufGroup.base;\n            limit = hufGroup.limit;\n        }\n        i = hufGroup.minLen;\n        j = bits(i);\n        while(true) {\n            if (i > hufGroup.maxLen) message.Error(\"Invalid bzip data\");\n            if (j <= limit[i]) break;\n            i++;\n            j = (j << 1) | bits(1);\n        }\n        j -= base[i];\n        if (j < 0 || j >= MAX_SYMBOLS) message.Error(\"Invalid bzip data\");\n        var nextSym = hufGroup.permute[j];\n        if (nextSym == SYMBOL_RUNA || nextSym == SYMBOL_RUNB) {\n            if (!runPos){\n                runPos = 1;\n                t = 0;\n            }\n            if (nextSym == SYMBOL_RUNA) t += runPos;\n            else t += 2 * runPos;\n            runPos <<= 1;\n            continue;\n        }\n        if (runPos) {\n            runPos = 0;\n            if (count + t > bufsize) message.Error(\"Invalid bzip data\");\n            uc = this.symToByte[this.mtfSymbol[0]];\n            this.byteCount[uc] += t;\n            while(t--) buf[count++] = uc;\n        }\n        if (nextSym > symTotal) break;\n        if (count >= bufsize) message.Error(\"Invalid bzip data\");\n        i = nextSym - 1;\n        uc = this.mtfSymbol[i];\n        for(var k = i-1; k>=0; k--) {\n            this.mtfSymbol[k+1] = this.mtfSymbol[k];\n        }\n        this.mtfSymbol[0] = uc\n        uc = this.symToByte[uc];\n        this.byteCount[uc]++;\n        buf[count++] = uc;\n    }\n    if (origPtr < 0 || origPtr >= count) message.Error(\"Invalid bzip data\");\n    var j = 0;\n    for(var i = 0; i < 256; i++) {\n        k = j + this.byteCount[i];\n        this.byteCount[i] = j;\n        j = k;\n    }\n    for(var i = 0; i < count; i++) {\n        uc = buf[i] & 0xff;\n        buf[this.byteCount[uc]] |= (i << 8);\n        this.byteCount[uc]++;\n    }\n    var pos = 0, current = 0, run = 0;\n    if (count) {\n        pos = buf[origPtr];\n        current = (pos & 0xff);\n        pos >>= 8;\n        run = -1;\n    }\n    count = count;\n    var copies, previous, outbyte;\n    while(count) {\n        count--;\n        previous = current;\n        pos = buf[pos];\n        current = pos & 0xff;\n        pos >>= 8;\n        if (run++ == 3) {\n            copies = current;\n            outbyte = previous;\n            current = -1;\n        } else {\n            copies = 1;\n            outbyte = current;\n        }\n        while(copies--) {\n            crc = ((crc << 8) ^ this.crcTable[((crc>>24) ^ outbyte) & 0xFF])&0xFFFFFFFF; // crc32\n            stream(outbyte);\n        }\n        if (current != previous) run = 0;\n    }\n\n    crc = (crc ^ (-1)) >>> 0;\n    if ((crc|0) != (crcblock|0)) message.Error(\"Error in bzip2: crc32 do not match\");\n    streamCRC = (crc ^ ((streamCRC << 1) | (streamCRC >>> 31))) & 0xFFFFFFFF;\n    return streamCRC;\n}\n\nmodule.exports = bzip2;\n","var BITMASK = [0, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF];\n\n// returns a function that reads bits.\n// takes a buffer iterator as input\nmodule.exports = function bitIterator(nextBuffer) {\n    var bit = 0, byte = 0;\n    var bytes = nextBuffer();\n    var f = function(n) {\n        if (n === null && bit != 0) {  // align to byte boundary\n            bit = 0\n            byte++;\n            return;\n        }\n        var result = 0;\n        while(n > 0) {\n            if (byte >= bytes.length) {\n                byte = 0;\n                bytes = nextBuffer();\n            }\n            var left = 8 - bit;\n            if (bit === 0 && n > 0)\n                f.bytesRead++;\n            if (n >= left) {\n                result <<= left;\n                result |= (BITMASK[left] & bytes[byte++]);\n                bit = 0;\n                n -= left;\n            } else {\n                result <<= n;\n                result |= ((bytes[byte] & (BITMASK[n] << (8 - n - bit))) >> (8 - n - bit));\n                bit += n;\n                n = 0;\n            }\n        }\n        return result;\n    };\n    f.bytesRead = 0;\n    return 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