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Move the DecryptStream from src/core/stream.js and into its own file

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This commit is contained in:
Jonas Jenwald 2021-04-27 13:31:13 +02:00
parent cdb583b764
commit 28b0809e60
3 changed files with 67 additions and 49 deletions
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2
src/core/crypto.js
View File

@ -26,7 +26,7 @@ import {
warn,
} from "../shared/util.js";
import { isDict, isName, Name } from "./primitives.js";
import { DecryptStream } from "./stream.js";
import { DecryptStream } from "./decrypt_stream.js";
class ARCFourCipher {
constructor(key) {

66
src/core/decrypt_stream.js Normal file
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@ -0,0 +1,66 @@
/* Copyright 2012 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.
*/
/* eslint-disable no-var */
import { DecodeStream } from "./stream.js";
var DecryptStream = (function DecryptStreamClosure() {
// eslint-disable-next-line no-shadow
function DecryptStream(str, maybeLength, decrypt) {
this.str = str;
this.dict = str.dict;
this.decrypt = decrypt;
this.nextChunk = null;
this.initialized = false;
DecodeStream.call(this, maybeLength);
}
var chunkSize = 512;
DecryptStream.prototype = Object.create(DecodeStream.prototype);
DecryptStream.prototype.readBlock = function DecryptStream_readBlock() {
var 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);
var hasMoreData = this.nextChunk && this.nextChunk.length > 0;
var decrypt = this.decrypt;
chunk = decrypt(chunk, !hasMoreData);
var bufferLength = this.bufferLength;
var i,
n = chunk.length;
var buffer = this.ensureBuffer(bufferLength + n);
for (i = 0; i < n; i++) {
buffer[bufferLength++] = chunk[i];
}
this.bufferLength = bufferLength;
};
return DecryptStream;
})();
export { DecryptStream };

48
src/core/stream.js
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@ -948,53 +948,6 @@ var PredictorStream = (function PredictorStreamClosure() {
return PredictorStream;
})();
var DecryptStream = (function DecryptStreamClosure() {
// eslint-disable-next-line no-shadow
function DecryptStream(str, maybeLength, decrypt) {
this.str = str;
this.dict = str.dict;
this.decrypt = decrypt;
this.nextChunk = null;
this.initialized = false;
DecodeStream.call(this, maybeLength);
}
var chunkSize = 512;
DecryptStream.prototype = Object.create(DecodeStream.prototype);
DecryptStream.prototype.readBlock = function DecryptStream_readBlock() {
var 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);
var hasMoreData = this.nextChunk && this.nextChunk.length > 0;
var decrypt = this.decrypt;
chunk = decrypt(chunk, !hasMoreData);
var bufferLength = this.bufferLength;
var i,
n = chunk.length;
var buffer = this.ensureBuffer(bufferLength + n);
for (i = 0; i < n; i++) {
buffer[bufferLength++] = chunk[i];
}
this.bufferLength = bufferLength;
};
return DecryptStream;
})();
var NullStream = (function NullStreamClosure() {
// eslint-disable-next-line no-shadow
function NullStream() {
@ -1008,7 +961,6 @@ var NullStream = (function NullStreamClosure() {
export {
DecodeStream,
DecryptStream,
FlateStream,
NullStream,
PredictorStream,