all files / core/ decrypt-stream.js

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/* istanbul ignore next */ 
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
define(["require", "exports", "./decode-stream"], function (require, exports, decode_stream_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var _PdfDecryptStream = (function (_super) {
        __extends(_PdfDecryptStream, _super);
        function _PdfDecryptStream(stream, maybeLength, cipher) {
            var _this = _super.call(this, maybeLength) || this;
            _this._chunkSize = 512;
            _this.stream = stream;
            _this.dictionary = stream.dictionary;
            _this._cipher = cipher;
            _this._nextChunk = null;
            _this._initialized = false;
            return _this;
        }
        _PdfDecryptStream.prototype.readBlock = function () {
            var chunk;
            if (this._initialized) {
                chunk = this._nextChunk;
            }
            else {
                chunk = this.stream.getBytes(this._chunkSize);
                this._initialized = true;
            }
            if (!chunk || chunk.length === 0) {
                this.eof = true;
                return;
            }
            this._nextChunk = this.stream.getBytes(this._chunkSize);
            var hasMoreData = this._nextChunk && this._nextChunk.length > 0;
            chunk = this._cipher._decryptBlock(chunk, !hasMoreData);
            var n = chunk.length;
            var buffer = this.ensureBuffer(this.bufferLength + n);
            buffer.set(chunk, this.bufferLength);
            this.bufferLength += n;
        };
        return _PdfDecryptStream;
    }(decode_stream_1._PdfDecodeStream));
    exports._PdfDecryptStream = _PdfDecryptStream;
});