A high-performance and open-source OPC-UA stack implementation.

Note: this is just a stack implementation (channels, serialization, structures, security). If you're looking to build a client or server, try the OPC-UA Client SDK or OPC-UA Server SDK.

Certificate validation is implemented in the server stack and so upon running the ClientServerExample for the first time you'll probably see a stack trace containing this exception:

Caused by: com.digitalpetri.opcua.stack.core.UaException: security checks failed
	at UaTcpClientAcknowledgeHandler.onError(UaTcpClientAcknowledgeHandler.java:162)
	at UaTcpClientAcknowledgeHandler.decode(UaTcpClientAcknowledgeHandler.java:89)

You'll now find a "security" folder in whatever you've configured your working directory as when running the example. Inside that folder, you should find "rejected", "revocation", and "trusted" folders. Move the client certificate in the "rejected" folder to the "trusted" folder and run the example again.

Releases are available from Maven Central:

<dependency>
    <groupId>com.digitalpetri.opcua</groupId>
    <artifactId>stack-server</artifactId>
    <version>1.1.0</version>
</dependency>

<dependency>
    <groupId>com.digitalpetri.opcua</groupId>
    <artifactId>stack-client</artifactId>
    <version>1.1.0</version>
</dependency>

The latest snapshots are available from the Sonatype snapshot repository:

<repository>
    <id>oss-sonatype</id>
    <name>oss-sonatype</name>
    <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
</repository>

• OPC-UA TCP

• OPC-UA Binary

• None
• Basic128Rsa15
• Basic256
• Basic256Sha256

• SOAP/HTTP/HTTPS Transport
• XML Data Encoding

Contact [email protected] for more information.

Apache License, Version 2.0