123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110 |
- (function() {
- var nodeEnv = typeof require !== 'undefined' && typeof process !== 'undefined';
- var __module = nodeEnv ? module : {exports:{}};
- var __filename = 'preview-scripts/__node_modules/public-encrypt/publicEncrypt.js';
- var __require = nodeEnv ? function (request) {
- return cc.require(request);
- } : function (request) {
- return __quick_compile_project__.require(request, __filename);
- };
- function __define (exports, require, module) {
- if (!nodeEnv) {__quick_compile_project__.registerModule(__filename, module);}var parseKeys = require('parse-asn1')
- var randomBytes = require('randombytes')
- var createHash = require('create-hash')
- var mgf = require('./mgf')
- var xor = require('./xor')
- var BN = require('bn.js')
- var withPublic = require('./withPublic')
- var crt = require('browserify-rsa')
- var Buffer = require('safe-buffer').Buffer
- module.exports = function publicEncrypt (publicKey, msg, reverse) {
- var padding
- if (publicKey.padding) {
- padding = publicKey.padding
- } else if (reverse) {
- padding = 1
- } else {
- padding = 4
- }
- var key = parseKeys(publicKey)
- var paddedMsg
- if (padding === 4) {
- paddedMsg = oaep(key, msg)
- } else if (padding === 1) {
- paddedMsg = pkcs1(key, msg, reverse)
- } else if (padding === 3) {
- paddedMsg = new BN(msg)
- if (paddedMsg.cmp(key.modulus) >= 0) {
- throw new Error('data too long for modulus')
- }
- } else {
- throw new Error('unknown padding')
- }
- if (reverse) {
- return crt(paddedMsg, key)
- } else {
- return withPublic(paddedMsg, key)
- }
- }
- function oaep (key, msg) {
- var k = key.modulus.byteLength()
- var mLen = msg.length
- var iHash = createHash('sha1').update(Buffer.alloc(0)).digest()
- var hLen = iHash.length
- var hLen2 = 2 * hLen
- if (mLen > k - hLen2 - 2) {
- throw new Error('message too long')
- }
- var ps = Buffer.alloc(k - mLen - hLen2 - 2)
- var dblen = k - hLen - 1
- var seed = randomBytes(hLen)
- var maskedDb = xor(Buffer.concat([iHash, ps, Buffer.alloc(1, 1), msg], dblen), mgf(seed, dblen))
- var maskedSeed = xor(seed, mgf(maskedDb, hLen))
- return new BN(Buffer.concat([Buffer.alloc(1), maskedSeed, maskedDb], k))
- }
- function pkcs1 (key, msg, reverse) {
- var mLen = msg.length
- var k = key.modulus.byteLength()
- if (mLen > k - 11) {
- throw new Error('message too long')
- }
- var ps
- if (reverse) {
- ps = Buffer.alloc(k - mLen - 3, 0xff)
- } else {
- ps = nonZero(k - mLen - 3)
- }
- return new BN(Buffer.concat([Buffer.from([0, reverse ? 1 : 2]), ps, Buffer.alloc(1), msg], k))
- }
- function nonZero (len) {
- var out = Buffer.allocUnsafe(len)
- var i = 0
- var cache = randomBytes(len * 2)
- var cur = 0
- var num
- while (i < len) {
- if (cur === cache.length) {
- cache = randomBytes(len * 2)
- cur = 0
- }
- num = cache[cur++]
- if (num) {
- out[i++] = num
- }
- }
- return out
- }
- }
- if (nodeEnv) {
- __define(__module.exports, __require, __module);
- }
- else {
- __quick_compile_project__.registerModuleFunc(__filename, function () {
- __define(__module.exports, __require, __module);
- });
- }
- })();
|