> ## Documentation Index
> Fetch the complete documentation index at: https://cashfreepayments-d00050e9-theme-update.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Authorize

> Use this API to authenticate with the Cashfree system and obtain the authorization bearer token. All other API calls must have this token as Authorization header in the format 'Bearer <token>' (without quotes) for them to get processed.

<Note>
  **URLs** <br />

  * Production/Live: [https://payout-api.cashfree.com/payout/v1/authorize](https://payout-api.cashfree.com/payout/v1/authorize)
  * Sandbox/Test: [https://payout-gamma.cashfree.com/payout/v1/authorize](https://payout-gamma.cashfree.com/payout/v1/authorize)
</Note>

<Accordion title="Click to view the steps to generate a public key and the signature.">
  If you do not have a static IP, you can generate a public key and pass it with the API request.
  To generate a public key,

  1. Go Payouts Dashboard > **Developers** section on the left-side navigation > **Payouts** > **Two-Factor Authentication** > **Public Key**.
  2. Click **Generate Public Key**. The public key will be downloaded to your computer and the password to access it will be your email ID registered with Cashfree Payments. Only one Public Key can be generated at a time.

  <img height="200" src="https://files.readme.io/e63af1b-Screenshot_2022-02-21_at_5.56.39_PM.png" />

  Below are the steps to generate your signature:

  1. Retrieve your clientId (one which you are passing through the header X-Client-Id )
  2. Append this with CURRENT UNIX timestamp separated by a period (.)
  3. Encrypt this data using RSA encrypt with Public key you received - this is the signature.
  4. Pass this signature through the header X-Cf-Signature.
     In the case of using our library, go through the libraries section. During the initialization process, you need to pass the key as a parameter.

  <CodeGroup>
    ```php PHP
    <?php
    public static function getSignature() {
        $clientId = "<your clientId here>";
        $publicKey =
    openssl_pkey_get_public(file_get_contents("/path/to/certificate/public
    _key.pem"));
        $encodedData = $clientId.".".strtotime("now");
        return static::encrypt_RSA($encodedData, $publicKey);
    }
    private static function encrypt_RSA($plainData, $publicKey) { if (openssl_public_encrypt($plainData, $encrypted, $publicKey,
    OPENSSL_PKCS1_OAEP_PADDING))
        $encryptedData = base64_encode($encrypted);
        else return NULL;
        return $encryptedData;
    }
    ?>
    ```

    ```java Java
    private static String generateEncryptedSignature(String clientIdWithEpochTimestamp) {
        // String clientIdWithEpochTimeStamp = clientId+"."+Instant.now().getEpochSecond();
        String encrytedSignature = "";
        try {
            byte[] keyBytes = Files
                .readAllBytes(new File("/Users/sameera/Downloads/payout_test_public_key.pem").toPath()); // Absolute Path to be replaced
            String publicKeyContent = new String(keyBytes);
            System.out.println(publicKeyContent);
            publicKeyContent = publicKeyContent.replaceAll("[\\t\\n\\r]", "")
                .replace("-----BEGIN PUBLIC KEY-----", "").replace("-----END PUBLIC KEY-----", "");
            KeyFactory kf = KeyFactory.getInstance("RSA");
            System.out.println(publicKeyContent);
            X509EncodedKeySpec keySpecX509 = new X509EncodedKeySpec(
                Base64.getDecoder().decode(publicKeyContent));
            RSAPublicKey pubKey = (RSAPublicKey) kf.generatePublic(keySpecX509);
            final Cipher cipher = Cipher.getInstance("RSA/ECB/OAEPWithSHA-1AndMGF1Padding");
            cipher.init(Cipher.ENCRYPT_MODE, pubKey);
            encrytedSignature = Base64.getEncoder().encodeToString(cipher.doFinal(clientIdWithEpochTimestamp.getBytes()));
            System.out.println(encrytedSignature);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return encrytedSignature;
    }
    ```

    ```python Python
    from cashfree_sdk.payouts import Payouts
    // Initialise the SDK, pass public key for dynamic IP
    Payouts.init("<client_id>", "<client_secret>", "PROD", public_key= b'public key')
    ```

    ```javascript Node
    //require CashfreeSDK
    const cfSdk = require('cashfree-sdk');
    //access the PayoutsSdk from CashfreeSDK
    const {Payouts} = cfSdk;
    // Instantiate Cashfree Payouts
    const payoutsInstance = new Payouts({
    env: 'TEST',
    clientId: '<CLIENT_ID>',
    clientSecret: '<CLIENT_SECRET>',
    pathToPublicKey: '/path/to/your/public/key/file.pem',
    //"publicKey": "ALTERNATIVE TO SPECIFYING PATH (DIRECTLY PASTE PublicKey)"
    });
    ```
  </CodeGroup>
</Accordion>