Add keccak

README.md

@@ -10,3 +10,4 @@ This following libraries are currently included. Where possible add the relevant
 
 - [blakejs](https://github.com/dcposch/blakejs)
 - [bn.js](https://github.com/indutny/bn.js/) [@types PR #26717](https://github.com/DefinitelyTyped/DefinitelyTyped/pull/26717)
+- [keccak](https://github.com/cryptocoinjs/keccak)

keccak/index.d.ts

@@ -0,0 +1,20 @@
+// Type definitions for keccak 1.4.0
+// Project: https://github.com/cryptocoinjs/keccak
+// Definitions by: Jaco Greeff <https://github.com/jacogr>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node"/>
+
+interface KeccakHasher {
+    digest(): Buffer;
+    update(message: string | Buffer): KeccakHasher;
+
+    _resetState(): void,
+    _clone(): KeccakHasher
+}
+
+type KeccakTypes = 'keccak224' | 'keccak256' | 'keccak384' | 'keccak512' | 'sha3-224' | 'sha3-256' | 'sha3-384' | 'sha3-512' | 'shake128' | 'shake256';
+
+type keccak = (type: KeccakTypes) => KeccakHasher;
+
+export = keccak;

keccak/keccak-tests.ts

@@ -0,0 +1,7 @@
+import createKeccak = require('keccak');
+
+const context = createKeccak('keccak256');
+
+context.update(Buffer.from([1, 2, 3, 4, 5]));
+context.update('hello world');
+context.digest();

keccak/tsconfig.json

@@ -0,0 +1,16 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": ["index.d.ts", "bn.js-tests.ts"]
+}

keccak/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }