SQL Operations Studio Public Preview 1 (0.23) release source code

src/vs/base/node/crypto.ts

@@ -0,0 +1,45 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import * as fs from 'fs';
+import * as crypto from 'crypto';
+import * as stream from 'stream';
+import { TPromise } from 'vs/base/common/winjs.base';
+import { once } from 'vs/base/common/functional';
+
+export function checksum(path: string, sha1hash: string): TPromise<void> {
+	const promise = new TPromise<string>((c, e) => {
+		const input = fs.createReadStream(path);
+		const hash = crypto.createHash('sha1');
+		const hashStream = hash as any as stream.PassThrough;
+		input.pipe(hashStream);
+
+		const done = once((err?: Error, result?: string) => {
+			input.removeAllListeners();
+			hashStream.removeAllListeners();
+
+			if (err) {
+				e(err);
+			} else {
+				c(result);
+			}
+		});
+
+		input.once('error', done);
+		input.once('end', done);
+		hashStream.once('error', done);
+		hashStream.once('data', data => done(null, data.toString('hex')));
+	});
+
+	return promise.then(hash => {
+		if (hash !== sha1hash) {
+			return TPromise.wrapError<void>(new Error('Hash mismatch'));
+		}
+
+		return TPromise.as(null);
+	});
+}