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+/**
+ * @license
+ * Copyright 2017 Google LLC
+ *
+ * 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.
+ */
+/**
+ * @fileoverview SHA-1 cryptographic hash.
+ * Variable names follow the notation in FIPS PUB 180-3:
+ * http://csrc.nist.gov/publications/fips/fips180-3/fips180-3_final.pdf.
+ *
+ * Usage:
+ *   var sha1 = new sha1();
+ *   sha1.update(bytes);
+ *   var hash = sha1.digest();
+ *
+ * Performance:
+ *   Chrome 23:   ~400 Mbit/s
+ *   Firefox 16:  ~250 Mbit/s
+ *
+ */
+/**
+ * SHA-1 cryptographic hash constructor.
+ *
+ * The properties declared here are discussed in the above algorithm document.
+ * @constructor
+ * @final
+ * @struct
+ */
+export declare class Sha1 {
+    /**
+     * Holds the previous values of accumulated variables a-e in the compress_
+     * function.
+     * @private
+     */
+    private chain_;
+    /**
+     * A buffer holding the partially computed hash result.
+     * @private
+     */
+    private buf_;
+    /**
+     * An array of 80 bytes, each a part of the message to be hashed.  Referred to
+     * as the message schedule in the docs.
+     * @private
+     */
+    private W_;
+    /**
+     * Contains data needed to pad messages less than 64 bytes.
+     * @private
+     */
+    private pad_;
+    /**
+     * @private {number}
+     */
+    private inbuf_;
+    /**
+     * @private {number}
+     */
+    private total_;
+    blockSize: number;
+    constructor();
+    reset(): void;
+    /**
+     * Internal compress helper function.
+     * @param buf Block to compress.
+     * @param offset Offset of the block in the buffer.
+     * @private
+     */
+    compress_(buf: number[] | Uint8Array | string, offset?: number): void;
+    update(bytes?: number[] | Uint8Array | string, length?: number): void;
+    /** @override */
+    digest(): number[];
+}