# DKIM Signature Verification with Typescript

[![MIT License](https://img.shields.io/github/license/invers-technology/dkim-ts?style=flat-square)](https://github.com/invers-technology/dkim-ts/blob/master/LICENSE)
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A dkim signature implementation with imap example and circom circuit.

**Use at your own risk**.

## Install

```
$ npm i dkim-verifier
```

## Usage

```ts
import { readFileSync } from "fs";
import {
  parseEmailToCanonicalized,
  verifyBody,
  verifyDkimSignature,
  getDkimPublicKey,
} from "dkim-verifier";

const emailRaw = fs.readFileSync("tests/example.eml", "utf8");
const { canonicalizedHeaders, canonicalizedBody, dkim } =
  parseEmailToCanonicalized(emailRaw);
const isBodyVerified = verifyBody(canonicalizedBody, dkim);
const publicKey = await getDkimPublicKey(dkim);
const isDkimVerified = verifyDkimSignature(
  dkim,
  canonicalizedHeaders,
  publicKey,
);

expect(isBodyVerified).toBe(true);
expect(isDkimVerified).toBe(true);
```

## Test

```shell
$ yarn test
```

## Example

Please set your gmail account info.

```shell
$ cp .env.example .env
$ ts-node example/imap.ts
```