# AWS CloudHSM Client SDK 3 supported platforms
<a name="sdk3-support"></a>

****  
 SDK versions 5.8.0 and earlier have reached their end of support. After March 31, 2025 documentation for SDK versions 3.4.4 and earlier will no longer be available.

AWS CloudHSM Client SDK 3 requires a client daemon and offers command-line tools including, CloudHSM Management Utility (CMU), key management utility (KMU), and the configure tool. 

Base support is different for each version of the AWS CloudHSM Client SDK. Typically platform support for components in an SDK matches base support, but not always. To determine platform support for a given component, first make sure the platform you want appears in the base section for the SDK, then check for any exclusions or any other pertinent information in the component section.

Platform support changes over time. Earlier versions of the CloudHSM Client SDK may not support all the operating systems listed here. Use release notes to determine the operating system support for previous versions of the CloudHSM Client SDK. For more information, see [Downloads for AWS CloudHSM Client SDK](client-history.md).

AWS CloudHSM supports only 64-bit operating systems.

**Topics**
+ [Linux support for AWS CloudHSM Client SDK 3](sdk3-linux.md)
+ [Windows support for AWS CloudHSM Client SDK 3](sdk3-windows.md)
+ [HSM compatibility for AWS CloudHSM Client SDK 3](sdk3-hsm-types.md)

# Linux support for AWS CloudHSM Client SDK 3
<a name="sdk3-linux"></a>

AWS CloudHSM Client SDK 3 supports the following Linux operating systems and platforms.
+ Amazon Linux
+ Amazon Linux 2
+ CentOS 6.10\$1 2
+ CentOS 7.3\$1
+ CentOS 8 1,4
+ Red Hat Enterprise Linux (RHEL) 6.10\$1 2
+ Red Hat Enterprise Linux (RHEL) 7.3\$1
+ Red Hat Enterprise Linux (RHEL) 8 1
+ Ubuntu 16.04 LTS 3
+ Ubuntu 18.04 LTS 1

[1] No support for OpenSSL Dynamic Engine. For more information, see [OpenSSL Dynamic Engine](sdk3-compare.md#openssl-collapse).

[2] No support for Client SDK 3.3.0 and later.

[3] SDK 3.4 is the last supported release on Ubuntu 16.04.

[4] SDK 3.4 is the last supported release on CentOS 8.3\$1.

# Windows support for AWS CloudHSM Client SDK 3
<a name="sdk3-windows"></a>

AWS CloudHSM Client SDK 3 supports the following versions of Windows Server.
+ Microsoft Windows Server 2012
+ Microsoft Windows Server 2012 R2
+ Microsoft Windows Server 2016
+ Microsoft Windows Server 2019

# HSM compatibility for AWS CloudHSM Client SDK 3
<a name="sdk3-hsm-types"></a>

The following table describes AWS CloudHSM Client SDK 3 compatibility for HSMs.


| hsm1.medium | hsm2m.medium | 
| --- | --- | 
| Compatible with Client version SDK 3.1.0 and later. |  Not supported.  |