/** * @licstart The following is the entire license notice for the * JavaScript code in this page * * Copyright 2022 Mozilla Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * @licend The above is the entire license notice for the * JavaScript code in this page */ "use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.DecryptStream = void 0; var _decode_stream = require("./decode_stream.js"); const chunkSize = 512; class DecryptStream extends _decode_stream.DecodeStream { constructor(str, maybeLength, decrypt) { super(maybeLength); this.str = str; this.dict = str.dict; this.decrypt = decrypt; this.nextChunk = null; this.initialized = false; } readBlock() { let chunk; if (this.initialized) { chunk = this.nextChunk; } else { chunk = this.str.getBytes(chunkSize); this.initialized = true; } if (!chunk || chunk.length === 0) { this.eof = true; return; } this.nextChunk = this.str.getBytes(chunkSize); const hasMoreData = this.nextChunk && this.nextChunk.length > 0; const decrypt = this.decrypt; chunk = decrypt(chunk, !hasMoreData); const bufferLength = this.bufferLength, newLength = bufferLength + chunk.length, buffer = this.ensureBuffer(newLength); buffer.set(chunk, bufferLength); this.bufferLength = newLength; } } exports.DecryptStream = DecryptStream;