diff --git a/types/ssri/index.d.ts b/types/ssri/index.d.ts
new file mode 100644
index 0000000000..8cecbfe28d
--- /dev/null
+++ b/types/ssri/index.d.ts
@@ -0,0 +1,126 @@
+// Type definitions for ssri 6.0
+// Project: https://github.com/zkat/ssri
+// Definitions by: Jeow Li Huan <https://github.com/huan086>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+import { Utf8AsciiLatin1Encoding, Hash as CryptoHash } from "crypto";
+import { Readable, Transform } from "stream";
+
+export interface HashLike {
+    algorithm: string;
+    digest: string;
+    options?: string[];
+}
+
+export interface IntegrityLike {
+    [algorithm: string]: HashLike[];
+}
+
+export type IntegrityMap = Integrity & IntegrityLike;
+
+export class Hash implements HashLike {
+    constructor(hash: string, opts?: { strict?: boolean });
+
+    source: string;
+    algorithm: string;
+    digest: string;
+    options?: string[];
+    isHash: boolean;
+
+    hexDigest(): string;
+
+    toJSON(): string;
+
+    toString(opts?: { strict?: boolean }): string;
+}
+
+export class Integrity {
+    isIntegrity: boolean;
+
+    toJSON(): string;
+
+    toString(opts?: { strict?: boolean, sep?: string }): string;
+
+    concat(
+        integrity: string | IntegrityLike | HashLike,
+        opts?: { strict?: boolean }
+    ): IntegrityMap;
+
+    hexDigest(): string;
+
+    match(
+        integrity: string | IntegrityLike | HashLike,
+        opts?: { strict?: boolean, pickAlgorithm?: (algo1: string, algo2: string) => string }
+    ): Hash | false;
+
+    pickAlgorithm(opts?: { pickAlgorithm?: (algo1: string, algo2: string) => string }): string;
+}
+
+export function parse(
+    sri: string | IntegrityLike | HashLike,
+    opts?: { strict?: boolean }
+): IntegrityMap;
+
+export function parse(
+    sri: string | IntegrityLike | HashLike,
+    opts?: { single: true, strict?: boolean }
+): Hash;
+
+export function stringify(
+    obj: string | IntegrityLike | HashLike,
+    opts?: { strict?: boolean, sep?: string }
+): string;
+
+export function fromHex(
+    hexDigest: string,
+    algorithm: string,
+    opts?: { strict?: boolean, options?: ReadonlyArray<string> }
+): IntegrityMap;
+
+export function fromHex(
+    hexDigest: string,
+    algorithm: string,
+    opts?: { single: true, strict?: boolean, options?: ReadonlyArray<string> }
+): Hash;
+
+export function fromData(
+    data: string | Buffer | NodeJS.TypedArray | DataView,
+    opts?: { strict?: boolean, options?: ReadonlyArray<string>, algorithms?: ReadonlyArray<string> }
+): IntegrityMap;
+
+export function fromStream(
+    stream: Readable,
+    opts?: { strict?: boolean, options?: ReadonlyArray<string>, algorithms?: ReadonlyArray<string>, Promise?: PromiseConstructorLike }
+): PromiseLike<IntegrityMap>;
+
+export function checkData(
+    data: string | Buffer | NodeJS.TypedArray,
+    sri: string | IntegrityLike | HashLike,
+    opts?: { strict?: boolean, error?: boolean, size?: number, pickAlgorithm?: (algo1: string, algo2: string) => string }
+): Hash | false;
+
+export function checkStream(
+    stream: Readable,
+    sri: string | IntegrityLike | HashLike,
+    opts?: {
+        strict?: boolean,
+        options?: ReadonlyArray<string>,
+        size?: number,
+        pickAlgorithm?: (algo1: string, algo2: string) => string,
+        Promise?: PromiseConstructorLike
+    }
+): PromiseLike<Hash>;
+
+export function integrityStream(
+    opts?: {
+        single?: boolean,
+        strict?: boolean,
+        options?: ReadonlyArray<string>,
+        algorithms?: ReadonlyArray<string>,
+        integrity?: string | IntegrityLike | HashLike,
+        size?: number,
+        pickAlgorithm?: (algo1: string, algo2: string) => string,
+    }
+): Transform;
+
+export function create(opts?: { strict?: boolean, options?: ReadonlyArray<string>, algorithms?: ReadonlyArray<string> }): CryptoHash;
diff --git a/types/ssri/ssri-tests.ts b/types/ssri/ssri-tests.ts
new file mode 100644
index 0000000000..03190cec2b
--- /dev/null
+++ b/types/ssri/ssri-tests.ts
@@ -0,0 +1,135 @@
+/// <reference types="node" />
+
+import ssri = require('ssri');
+import { Hash as CryptoHash } from "crypto";
+import { createReadStream } from 'fs';
+import { Transform } from 'stream';
+
+const integrityString = 'sha512-9KhgCRIx/AmzC8xqYJTZRrnO8OW2Pxyl2DIMZSBOr0oDvtEFyht3xpp71j/r/pAe1DM+JI/A+line3jUBgzQ7A==?foo';
+const hash = { algorithm: 'sha512', digest: 'c0ffee', options: [] };
+
+const integrity = {
+    sha1: [{ algorithm: 'sha1', digest: 'deadbeef', options: [] }],
+    sha512: [
+        { algorithm: 'sha512', digest: 'c0ffee', options: [] },
+        { algorithm: 'sha512', digest: 'bad1dea', options: ['foo'] }
+    ],
+};
+
+const parseString1: ssri.IntegrityMap = ssri.parse(integrityString);
+const parseHash: ssri.IntegrityMap = ssri.parse(hash);
+const parseIntegrity: ssri.IntegrityMap = ssri.parse(integrity);
+const parseStringSingle: ssri.Hash = ssri.parse(integrityString, { single: true, strict: true });
+const parseStringWithOptions: ssri.IntegrityMap = ssri.parse(integrityString, { strict: true });
+
+const stringifyString: string = ssri.stringify('\n\rsha512-foo\n\t\tsha384-bar');
+const stringifyHash: string = ssri.stringify(hash);
+const stringifyIntegrity: string = ssri.stringify(integrity);
+const stringifyStringWithOptions: string = ssri.stringify(
+    '\n\rsha512-foo\n\t\tsha384-bar',
+    { strict: false, sep: ',' }
+);
+
+const integrityConcatString: ssri.IntegrityMap = new ssri.Integrity().concat(integrityString);
+const integrityConcatHash: ssri.IntegrityMap = new ssri.Integrity().concat(hash);
+const integrityConcatIntegrity: ssri.IntegrityMap = new ssri.Integrity().concat(integrity);
+const integrityConcatStringWithOptions: ssri.IntegrityMap = new ssri.Integrity().concat(
+    integrityString,
+    { strict: true }
+);
+
+const integrityToString: string = new ssri.Integrity().toString();
+const integrityToStringWithOptions: string = new ssri.Integrity().toString({ strict: false, sep: ',' });
+
+const integrityToJson: string = new ssri.Integrity().toJSON();
+
+const integrityMatchString: ssri.Hash | false = new ssri.Integrity().match(integrityString);
+const integrityMatchHash: ssri.Hash | false = new ssri.Integrity().match(hash);
+const integrityMatchIntegrity: ssri.Hash | false = new ssri.Integrity().match(integrity);
+const integrityMatchStringWithOptions: ssri.Hash | false = new ssri.Integrity().match(
+    integrityString,
+    { strict: true, pickAlgorithm: (a, b) => a }
+);
+
+const integrityPickAlgorithm: string = new ssri.Integrity().pickAlgorithm();
+const integrityPickAlgorithmWithOptions: string = new ssri.Integrity().pickAlgorithm({ pickAlgorithm: (a, b) => a });
+
+const integrityHexDigest: string = new ssri.Integrity().hexDigest();
+
+const fromHex: ssri.IntegrityMap = ssri.fromHex('75e69d6de79f', 'sha1');
+const fromHexSingle: ssri.Hash = ssri.fromHex(
+    '75e69d6de79f',
+    'sha1',
+    { single: true, strict: false, options: ['sriOpt'] }
+);
+const fromHexWithOptions: ssri.IntegrityMap = ssri.fromHex(
+    '75e69d6de79f',
+    'sha1',
+    { strict: false, options: ['sriOpt'] }
+);
+
+const fromDataString: ssri.IntegrityMap = ssri.fromData('foobarbaz');
+const fromDataBuffer: ssri.IntegrityMap = ssri.fromData(Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]));
+const fromDataStringWithOptions: ssri.IntegrityMap = ssri.fromData(
+    'foobarbaz', {
+        algorithms: ['sha256', 'sha384', 'sha512'],
+        strict: true,
+        options: ['sriOpt']
+    }
+);
+
+const fromStream: PromiseLike<ssri.IntegrityMap> = ssri.fromStream(createReadStream('index.js'));
+const fromStreamWithOptions: PromiseLike<ssri.IntegrityMap> = ssri.fromStream(
+    createReadStream('index.js'), {
+        algorithms: ['sha1', 'sha512'],
+        strict: true,
+        options: ['sriOpt'],
+        Promise
+    }
+);
+
+const create: CryptoHash = ssri.create();
+const createWithOptions: CryptoHash = ssri.create({
+    algorithms: ['sha1', 'sha512'],
+    strict: true,
+    options: ['sriOpt']
+});
+
+const checkDataString: ssri.Hash | false = ssri.checkData('data', integrityString);
+const checkDataBuffer: ssri.Hash | false = ssri.checkData(
+    Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]),
+    integrityString
+);
+const checkDataHash: ssri.Hash | false = ssri.checkData('data', hash);
+const checkDataIntegrity: ssri.Hash | false = ssri.checkData('data', integrity);
+const checkDataStringWithOptions: ssri.Hash | false = ssri.checkData(
+    'data',
+    integrityString,
+    { strict: true, pickAlgorithm: (a, b) => a, error: true, size: 1 }
+);
+
+const checkStreamString: PromiseLike<ssri.Hash> = ssri.checkStream(createReadStream('index.js'), integrityString);
+const checkStreamHash: PromiseLike<ssri.Hash> = ssri.checkStream(createReadStream('index.js'), hash);
+const checkStreamIntegrity: PromiseLike<ssri.Hash> = ssri.checkStream(createReadStream('index.js'), integrity);
+const checkStreamWithOptions: PromiseLike<ssri.Hash> = ssri.checkStream(
+    createReadStream('index.js'),
+    integrityString,
+    {
+        strict: true,
+        options: ['sriOpt'],
+        pickAlgorithm: (a, b) => a,
+        size: 1,
+        Promise
+    }
+);
+
+const integrityStream: Transform = ssri.integrityStream();
+const integrityStreamWithOptions: Transform = ssri.integrityStream({
+    single: true,
+    strict: true,
+    options: ['sriOpt'],
+    pickAlgorithm: (a, b) => a,
+    size: 1,
+    integrity,
+    algorithms: ['sha1', 'sha256']
+});
diff --git a/types/ssri/tsconfig.json b/types/ssri/tsconfig.json
new file mode 100644
index 0000000000..add9a00f51
--- /dev/null
+++ b/types/ssri/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "ssri-tests.ts"
+    ]
+}
diff --git a/types/ssri/tslint.json b/types/ssri/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/ssri/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }