# ms-rest-nodeauth [![Build Status](https://dev.azure.com/azure-public/adx/_apis/build/status/public.Azure.ms-rest-nodeauth)](https://dev.azure.com/azure-public/adx/_build/latest?definitionId=9)

This library provides different node.js based authentication mechanisms for services in Azure. It also contains rich type definitions thereby providing a good TypeScript experience.
All the authentication methods support callbacks as well as promises. If they are called within an async method in your application then you can use the async/await pattern as well.

### Example

### username/password based login
```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

const username = process.env["AZURE_USERNAME"];
const password = process.env["AZURE_PASSWORD"];

msRestNodeAuth.loginWithUsernamePasswordWithAuthResponse(username, password).then((authres) => {
  console.dir(authres, { depth: null })
}).catch((err) => {
  console.log(err);
});
```

### service-principal and secret based login
```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

const clientId = process.env["CLIENT_ID"];
const secret = process.env["APPLICATION_SECRET"];
const tenantId = process.env["DOMAIN"];

msRestNodeAuth.loginWithServicePrincipalSecretWithAuthResponse(clientId, secret, tenantId).then((authres) => {
  console.dir(authres, { depth: null })
}).catch((err) => {
  console.log(err);
});
```

#### service-principal and certificate based login by providing an ABSOLUTE file path to the .pem file
```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

const clientId = process.env["CLIENT_ID"];
const tenantId = process.env["DOMAIN"];

msRestNodeAuth.loginWithServicePrincipalCertificateWithAuthResponse(clientId, "/Users/user1/foo.pem", tenantId).then((authres) => {
  console.dir(authres, { depth: null })
}).catch((err) => {
  console.log(err);
});
```

#### service-principal and certificate based login by providing the certificate and private key (contents of the .pem file)
```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

const clientId = process.env["CLIENT_ID"];
const tenantId = process.env["DOMAIN"];
const certificate = 
`
-----BEGIN PRIVATE KEY-----
xxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxx
-----END PRIVATE KEY-----
-----BEGIN CERTIFICATE-----
yyyyyyyyyyyyyyyyy
yyyyyyyyyyyyyyyyy
-----END CERTIFICATE-----
`;

msRestNodeAuth.loginWithServicePrincipalCertificateWithAuthResponse(clientId, certificate, tenantId).then((authres) => {
  console.dir(authres, { depth: null })
}).catch((err) => {
  console.log(err);
});
```

### interactive/device-code flow login
```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

msRestNodeAuth.interactiveLoginWithAuthResponse().then((authres) => {
  console.dir(authres, { depth: null })
}).catch((err) => {
  console.log(err);
});
```

### service-principal authentication from auth file on disk
Before using this method please install az cli from https://github.com/Azure/azure-cli/releases.
Then execute `az ad sp create-for-rbac --sdk-auth > ${yourFilename.json}`.

If you want to create the sp for a different cloud/environment then please execute:
1. az cloud list
2. az cloud set –n <name of the environment>
3. az ad sp create-for-rbac --sdk-auth > auth.json // create sp with **secret**.
  
          OR
          
   az ad sp create-for-rbac --create-cert --sdk-auth > auth.json // create sp with **certificate**.
If the service principal is already created then login with service principal info:
4. az login --service-principal -u `<clientId>` -p `<clientSecret>` -t `<tenantId>`
5. az account show --sdk-auth > auth.json

```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

const options: msRestNodeAuth.LoginWithAuthFileOptions = {
  filePath: "<file path to auth file>",
}
msRestNodeAuth.loginWithAuthFileWithAuthResponse(options).then((authRes) => {
  console.log(authRes);
  console.log(process.env["AZURE_SUBSCRIPTION_ID"]);
}).catch((err) => {
  console.log(err);
});
```

### MSI (Managed Service Identity) based login from a virtual machine created in Azure.
```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

const options: msRestNodeAuth.MSIVmOptions = {
  port: 50342;
}

msRestNodeAuth.loginWithVmMSI(options).then((msiTokenRes) => {
  console.log(msiTokenRes);
}).catch((err) => {
  console.log(err);
});
```

### MSI (Managed Service Identity) based login from an AppService or Azure Function created in Azure.
```typescript
import * as msRestNodeAuth from "@azure/ms-rest-nodeauth";

const options: msRestNodeAuth.MSIAppServiceOptions = {
  msiEndpoint: "http://127.0.0.1:41741/MSI/token/";
}

msRestNodeAuth.loginWithAppServiceMSI(options).then((msiTokenRes) => {
  console.log(msiTokenRes);
}).catch((err) => {
  console.log(err);
});
```

### Getting credentials via Azure CLI.

**Pre-requisite**
- **Install azure-cli**. For more information see [here](https://docs.microsoft.com/en-us/cli/azure/install-azure-cli?view=azure-cli-latest).
- **Login via `az login`**
- Detailed sample over [here](./samples/getCredentialsFromAzureCli.ts).

```typescript
import { AzureCliCredentials } from "@azure/ms-rest-nodeauth";
import { ServiceClient, RequestPrepareOptions } from "@azure/ms-rest-js";

async function main(): Promise<void> {
  try {
    // Please make sure you have logged in via Azure CLI `az login` before executing this script.
    const creds = await AzureCliCredentials.create();
    const client = new ServiceClient(creds);
    console.log(">>> Subscription associated with the access token: '%s'.",
      creds.tokenInfo.subscription);

    const request: RequestPrepareOptions = {
      url: getUrl(creds.subscriptionInfo.id),
      method: "GET"
    };
    console.log(">>> Request url: '%s'.", request.url);

    const res = await client.sendRequest(request);
    console.log("List of resource groups from subscriptionId '%s': \n%O",
      creds.subscriptionInfo.id, res.parsedBody);

    // Let us change the subscriptionId, which should trigger refreshing the access token.
    const subscriptions = await AzureCliCredentials.listAllSubscriptions();
    creds.subscriptionInfo = subscriptions[1];

    console.log(">>> The new subscription id associated with the credential object is: '%s'.",
      creds.subscriptionInfo.id);
    request.url = getUrl(creds.subscriptionInfo.id);
    console.log(">>> Request url: '%s'.", request.url);

    const res2 = await client.sendRequest(request);
    console.log("List of resource groups from subscriptionId '%s': \n%O",
      creds.subscriptionInfo.id, res2.parsedBody);

    console.log(">>> Subscription associated with the access token: '%s'.",
      creds.tokenInfo.subscription);
  } catch (err) {
    console.log(err);
  }
}

function getUrl(subscriptionId: string): string {
  return `https://management.azure.com/subscriptions/${subscriptionId}/resourcegroups?api-version=2018-05-01`;
}

main();
```

### Contributing

This project welcomes contributions and suggestions.  Most contributions require you to agree to a
Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
the rights to use your contribution. For details, visit https://cla.microsoft.com.

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide
a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions
provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.