> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/actions/actions-description/group-code-flow/checksum.md).

# CheckSum

Calculates Checksum based on CR32, MD5, SHA256, HMAC\_SHA256 and PBKDF2-HMAC-SHA256.

Action available for the following operating systems:

![](/files/-MAlQBZuuTnc6hyzKSVQ)

### Parameters

* **Type** *\<unquoted string> -* The type of checksum that the user wants to perform. The possible values for this parameter are: *MD5*, *CRC32* or *dynamic*.
* **Source Type** *\<unquoted string> -* The type of source that the user wants to calculate the checksum. The possible values for this parameter are: *File*, *Text* or *dynamic*.
* **Unicode** *\<unquoted string> -* Indicates if the file is in Unicode format or not. Tippicaly, text files are ANSI encoded. In that case, user must set this parameter to NO, otherwise set to YES.
* **Source** *\<string> -* The source for the text or file to execute this action. If user chooses a file, he must indicate the full path to the file.
* **Key** *\<string> -* This option is used when you use the type HMAC\_SHA256 or PBKDF2-HMAC-SHA256.
* **Rounds** *\<numeric> -* This option is used when you use the type PBKDF2-HMAC-SHA256.
* **Target** *\<unquoted string> -* The control or variable to store the result of this action.