---
title: "Sign String With SHA"
slug: "sign-string-with-sha256"
tags: ["string", "SHA 256"]
updated: 2022-12-12T14:54:09Z
published: 2022-12-12T14:54:09Z
canonical: "documentation.decisions.com/sign-string-with-sha256"
---

> ## 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.

# Sign String With SHA256

| ## Step Details |
| --- |
| **Introduced in Version** | 4.0.0 |
| **Last Modified in Version** | 5.0.0 |
| **Location** | Data > Text |

The **Sign String With SHA256** will sign a string value using a secret key string and encoding type with SHA256 encryption

---

## Properties

#### Inputs

| Property | Description | Data Type |
| --- | --- | --- |
| Encoding | Allows the user to select the encoding type | StringEncodingType |
| Secret String | Secret string to sign the string | String |
| String To Sign | The desired string to sign | String |

#### Outputs

| Property | Description | Data Type |
| --- | --- | --- |
| Output | Encrypted SHA256 string | String |

---

## Example Inputs and Outputs

| String To Sign | Secret String | Encoding | Output |
| --- | --- | --- | --- |
| More Text | scree | Unicode | JKB1ZFahT5PGLP7lQtE5jdzzAiR6aKwYVMrCI7HOYEk= |
| More Text | 4n8si3lx8 | UTF8 | qj0C2H6i3ru268w15mJ6GcmKYYW6DlDiaJzX/lcwixM= |
| More Text | Null | UTF32 | F5RQb7PeFYVC7vlOOuQoea4ZsYpGkVLorSG7aSmzZZA= |
| Null Value | 8dj3ss3s9x | ASCII | EXCEPTION MESSAGE |

#### ![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/2022-12-08_11h03_05.png)

---

## Common Errors

### String reference not set to an instance of a String

If the String to Sign is null, an error will occur. To correct this, ensure that the value in String to Sign is not null.

#### Exception Message:

```csharp
Exception Stack Trace: DecisionsFramework.Design.Flow.ErrorRunningFlowStep: Error running step Sign String With SHA 256 1[SignStringWithSHA256] in flow [Flow 2]: Exception invoking method SignStringWithSHA256 on class StringEncryption 
 ---> DecisionsFramework.LoggedException: Exception invoking method SignStringWithSHA256 on class StringEncryption 
 ---> System.ArgumentNullException: String reference not set to an instance of a String. (Parameter 's') 
   at System.Text.Encoding.GetBytes(String s) 
   at DecisionsFramework.Design.Flow.CoreSteps.StandardSteps.StringEncryption.SignStringWithSHA256(String stringToSign, String secretString, StringEncodingType encoding)   
   --- 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)    --
```

## Related

- [Get HMAC-SHA256 Hash Step](/get-hmac-sha256-hash-step.md)
- [Get HMAC-SHA384 Hash](/get-hmac-sha384-hash.md)
- [Hash String With SHA 256](/hash-string-with-sha-256.md)
- [Send Documents For Signing](/send-documents-for-signing.md)