---
title: Wrap your customer-supplied key
description: Wrap the symmetric key to use for encryption with the downloaded public key.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/platform-security/wrap-customer-supplied-key.html
release: australia
topic_type: task
last_updated: "2026-03-12"
reading_time_minutes: 2
breadcrumb: [Using customer-supplied keys with Field Encryption Enterprise, Using Field Encryption, Field Encryption, Encryption]
---

# Wrap your customer-supplied key

Wrap the symmetric key to use for encryption with the downloaded public key.

## Before you begin

**Note:** This procedure describes options that are available with KMF base system and options to be used with Field Encryption Enterprise functionality. Field Encryption Enterprise functionality is available only when the com.glide.now.platform.encryption plugin is active. See [Activate Field Encryption](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/platform-security/activate-platform-encryption.md) for more information on obtaining Field Encryption Enterprise.

The examples in this task use the OpenSSL tool. For more information on this tool see [https://www.openssl.org](https://www.openssl.org). If you are using other cryptographic tools, such as LibreSSL or GnuTLS, refer to the documentation for those products for similar steps.

-   Modify optional properties that control the size, padding algorithm, and validity period of the key. See [Configure properties for customer-supplied keys](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/platform-security/customer-supplied-keys.md).
-   You must have your symmetric key \(.BIN\) for encryption.

    **Important:** Your key must be in binary format. If another format is used, a `Token failed validation. Please reattach the unmodified token.`error message displays.


Role required: security\_admin  and sn\_kmf.cryptographic\_manager  or sn\_kmf.admin

## Procedure

1.  From a command line, use your copied `token_publickey` file name to open the folder of the unzipped files as a placeholder for the wrapped key.

2.  Edit this script by replacing the examples with the names of your crypto files.

    ```
    "downloads user.name$ cd `token_publickey_<token>`
    openssl pkeyutl -encrypt -pubin -inkey `publickey_<keyname>.PEM`
    -in `<keyname.bin>`
    -out wrapped_key_material -pkeyopt rsa_padding_mode:oaep -pkeyopt rsa_oaep_md:sha<128 or 256> "
    ```

    Review the key wrapping commands in the following table for more information.

<table id="table_azx_3yk_snb"><thead><tr><th>

Directions

</th><th>

Command

</th><th>

Example

</th></tr></thead><tbody><tr><td>

Open the file directory where you downloaded the wrapping token.

</td><td>

```
cd
```

</td><td>

`cd token_publickey123456789`

</td></tr><tr><td>

Paste the name of the `publickey.PEM` certificate.

</td><td>

```
openssl pkeyutl -encrypt -pubin -inkey
```

</td><td>

`publickey_586798643ffff.PEM`

</td></tr><tr><td>

Paste the name of your key here.

</td><td>

```
-in
```

</td><td>

`mykey.bin`

</td></tr><tr><td>

Enter the &lt;-out&gt; command and specify if the key is 128 bit or 256 bit.

</td><td>

```
-out wrapped_key_material -pkeyopt rsa_padding_mode:oaep -pkeyopt rsa_oaep_md:sha256
```

</td><td>

N/A

</td></tr></tbody>
</table>3.  Run the command.

    A system message displays `token_publickey_<keynumber>`. The key will be generated and a `wrapped_key_material` file added to the directory.

4.  Upload the wrapped key.


## What to do next

Return to [Configure and upload your customer supplied key](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/platform-security/upload-customer-supplied-key.md) to upload your wrapped key.

**Parent Topic:**[Using customer-supplied keys with Field Encryption Enterprise](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/platform-security/csk-landing.md)

**Parent Topic:**[Using customer supplied keys with Column Level Encryption Enterprise](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/platform-security/csk-landing-2.md)