# Dynatrace Extension Signature validation failed

**URL:** <https://community.dynatrace.com/t/dynatrace-extension-signature-validation-failed/44737>\
**Category:** Extensions\
**Tags:** extensions\
**Created:** [March 18, 2024, 8:34pm UTC](https://community.dynatrace.com/t/dynatrace-extension-signature-validation-failed/44737 "2024-03-18T20:34:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sachinpai](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@Sachinpai](https://community.dynatrace.com/u/Sachinpai)\
**Post date:** [March 18, 2024, 8:34pm UTC](https://community.dynatrace.com/t/dynatrace-extension-signature-validation-failed/44737/1 "2024-03-18T20:34:59Z")

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Dynatrace Extension Signature validation failed error while uploading extension.

We are using internal certificate generation tool manage the life cycle of Certificate. To sign extension, we created certificate in pfx format and then used openssl command to separate cacert and private key file. Post that we used command “dt extension generate-developer-pem”&nbsp; to fuse both cacert and key file. Same fused file used during bundle process and cacert was uploaded to vault.

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**Author:** ![PacoPorro](https://dub1.discourse-cdn.com/dynatrace/user_avatar/community.dynatrace.com/pacoporro/32/36087_2.png) [@PacoPorro](https://community.dynatrace.com/u/PacoPorro)\
**Post date:** [March 19, 2024, 7:41am UTC](https://community.dynatrace.com/t/dynatrace-extension-signature-validation-failed/44737/2 "2024-03-19T07:41:15Z")

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Did you uploaded the certificate to the ActiveGate or oneagent?

> **[Sign extensions](https://docs.dynatrace.com/docs/ingest-from/extensions/develop-your-extensions/sign-extensions)**
>
> Learn how to sign an extension, upload certificates and custom extensions, and configure certificate permissions using the Dynatrace Extensions Framework.