SMB3 for WinCE

YNQ™ Adds Server/Client SMBv3 Capabilities To WinCE

The SMB protocol was introduced to Win CE in version 6 back in 2006. Microsoft kept supporting the protocol including in Win7, but did not maintain the SMB library or introduce upgrades for Windows CE to incorporate later protocols – SMB2 and SMB3.
The outdated versions of Windows CE are still in use today mainly in the industrial world, in sectors and areas such as automation and manufacturing, scales and analytical instruments, controllers, ATMs, gas and fluid system components, and energy automation. Due to the nature of these industries, an upgrade to a new operating system is impractical as it will require huge efforts and resources. These circumstances prevent the outdated Windows CE based machines to connect to network shares on Windows machines running SMB version 2 or later.

The protocol in use between the different systems

Windows 10 RS3 WS 2019 Windows 10 WS 2016 Windows 8.1 WS 2012 R2 Windows 8 WS 2012 Windows 7 WS 2008 R2 Windows Vista WS 2008 Previous Versions
SMB 3.1.1 SMB 3.1.1 SMB 3.1.1 SMB 3.02 SMB 3.0 SMB 2.1 SMB 2.0 SMB 1.0

Windows 10
RS3 WS 2019

SMB 3.1.1 SMB 3.1.1 SMB 3.1.1 SMB 3.02 SMB 3.0 SMB 2.1 SMB 2.0 ——

Windows 10
WS 2016

SMB 3.1.1 SMB 3.1.1 SMB 3.1.1 SMB 3.02 SMB 3.0 SMB 2.1 SMB 2.0 SMB 1.0

Windows 8.1
WS 2012 R2

SMB 3.02 SMB 3.02 SMB 3.02 SMB 3.02 SMB 3.0 SMB 2.1 SMB 2.0 SMB 1.0

Windows 8
WS 2012

SMB 3.0 SMB 3.0 SMB 3.0 SMB 3.0 SMB 3.0 SMB 2.1 SMB 2.0 SMB 1.0

Windows 7
WS 2008 R2

SMB 2.1 SMB 2.1 SMB 2.1 SMB 2.1 SMB 2.1 SMB 2.1 SMB 2.0 SMB 1.0

Windows Vista
WS 2008

SMB 2.0 SMB 2.0 SMB 2.0 SMB 2.0 SMB 2.0 SMB 2.0 SMB 2.0 SMB 1.0

Previous
Versions

SMB 1.0 —— SMB 1.0 SMB 1.0 SMB 1.0 SMB 1.0 SMB 1.0 SMB 1.0

The table above presents the outcome of SMB negotiations between two machines. The version of SMB used between the two machines will be the highest dialect supported by both.
When supported only by SMBv1, a WinCE machine will enforce the usage of SMBv1, which in newer operating systems is no longer supported by default (see article Bid Goodbye to Malware Prone SMBv).

Integrating the off-the-shelf YNQ library into Win CE enables connectivity with any SMB client or server supported machine.

Client-Server Features

FEATURE CLIENT SERVER
Support all SMB/CIFS versions from NTLM0.12 (SMB1) up to SMB 3.1.1
SMB Encryption
Message Signing
Pre-logon integrity
File/Directory operations include open, read, write, querying info and more
Network Browsing (domains, hosts and shares)  
Host resolution through DNS, LLMNR and NetBIOS
Multi-threaded  
Optimized reads and writes
Authentication LM to NTLMV2 SPNEGO
Authentication for Local Users  
Active Directory Integration – LDAP
DCERPC over SMB – SAMR, and LSA
DCERPC over SMB – SRVSVC, WKSSVS, WINREG
IPv4 and IPv6 Support

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