---
title: "Verify File"
slug: "verify-file-1"
updated: 2025-12-08T20:29:17Z
published: 2025-12-08T20:29:17Z
canonical: "documentation.decisions.com/verify-file-1"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://documentation.decisions.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Verify File

| ## Step Details |
| --- |
| **Introduced in Version** | 9.18.0 |
| **Last Modified in Version** | -- |
| **Location** | PGP |

---

The **Verify File** step uses the specified public key to determine whether the input file has an authentic digital signature.

### Prerequisites

- This step requires the [PGP module](https://documentation.decisions.com/docs/pgp-module-overview#overview) to be [installed](https://documentation.decisions.com/docs/installing-modules-decisions) before it will be available in the toolbox.
- Users must download [GPG](https://www.gnupg.org/download/) before utilizing this and other PGP steps.

### Considerations

In v9.18, PGP steps were moved to a legacy category, and new steps were added. While the new PGP steps use an updated encryption/decryption approach (based on **AEAD/OCB** **mode**), both categories of steps can be utilized as they have the same functionality.

---

## Properties

#### Inputs

| Property | Description | Data Type |
| --- | --- | --- |
| Data | The desired file to evaluate | List of Byte |
| Sender Public Key | The PGP-generated Public Key file | List of Byte |

---

## Example Inputs and Outputs

#### ![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/image-1675290390078.png)

---

## Common Errors

### Buffer cannot be null

If the Data or Sender Public Key fields are null or empty, the step will cause an error. To correct this, ensure both fields have an appropriate file uploaded or mapped.

#### Exception Message:

```csharp
Exception Stack Trace: DecisionsFramework.Design.Flow.ErrorRunningFlowStep: Error running step Verify File 1[VerifyFile] in flow [Flow 2]: Exception invoking method VerifyFile on class PGPSteps
 ---> DecisionsFramework.LoggedException: Exception invoking method VerifyFile on class PGPSteps
 ---> System.ArgumentNullException: Buffer cannot be null. (Parameter 'buffer'
 at System.IO.MemoryStream..ctor(Byte[] buffer
 at Decsisions.PGP.Steps.PGPSteps.VerifyFile(Byte[] senderPublicKey, Byte[] data)
   --- End of inner exception stack trace --- at DecisionsFramework.Design.Flow.StepImplementations.InvokeMethodStep.Run(StepStartData data
 at DecisionsFramework.Design.Flow.FlowStep.RunStepInternal(String flowTrackingID, String stepTrackingID, KeyValuePairDataStructure[] stepRunDataValues, AbstractFlowTrackingData trackingData
 at DecisionsFramework.Design.Flow.FlowStep.Start(String flowTrackingID, String stepTrackingID, FlowStateData data, AbstractFlowTrackingData trackingData, RunningStepData currentStepData)
   --- End of inner exception stack trace ---
```

---

## Step Changes

| Description | Version | Date | Developer Task |
| --- | --- | --- | --- |
| New steps have been added to the PGP Module. Existing steps have been added to the PGP Legacy category in the step toolbox. | [9.18](https://documentation.decisions.com/v99/docs/en/2ebf7a4c-e925-4e8f-9fd4-ff94a14910cc?isPreview=true&versionNumber=1) | December 2025 | [DT-046254] |

Related Information

Documentation: [PGP module](https://documentation.decisions.com/v8/docs/pgp-module-overview#overview) Forum Posts: [Email Encrypt / Decrypt With PGP Module](https://support.decisions.com/forum/topic1520-email-encrypt--decrypt-with-pgp-module.aspx) [Error While Encrypting A File Using PGP](https://support.decisions.com/forum/topic1814-error-while-encrypting-a-file-using-pgp.aspx) [PGP Issues With Decrypting Using Private Key](https://support.decisions.com/forum/topic2522-pgp-issues-with-decrypting-using-private-key.aspx)