Add JSSE-level PSK support via WolfSSLParameters

[cconlon]

This PR adds Pre-Shared Key (PSK) support to the JSSE layer inside wolfJSSE.

Changes include:

• Make WolfSSLParameters extend SSLParameters so PSK settings can be configured through the standard setSSLParameters() API on SSLSocket and SSLEngine
• Add PSK client/server callback, identity hint, and keepArrays fields to WolfSSLParameters with public getters/setters
• Wire PSK fields through WolfSSLParametersHelper.importParams() and WolfSSLEngineHelper.setLocalPskSettings() to apply them to the native WOLFSSL session
• Add 4 PSK example apps (SSLSocket and SSLEngine, client and server)

Usage

Configure PSK on any SSLSocket or SSLEngine using WolfSSLParameters:

SSLContext ctx = SSLContext.getInstance("TLSv1.2", "wolfJSSE");
ctx.init(null, null, null);

SSLSocket sock = (SSLSocket)ctx.getSocketFactory().createSocket(host, port);

WolfSSLParameters params = new WolfSSLParameters();
params.setPskClientCb(myPskClientCallback);
params.setCipherSuites(new String[]{"TLS_ECDHE_PSK_WITH_AES_128_GCM_SHA256"});
sock.setSSLParameters(params);

sock.startHandshake();

Server side uses setPskServerCb() and optionally setPskIdentityHint(). setKeepArrays(true) can be set to keep handshake arrays for post-handshake access. Works with both SSLSocket and SSLEngine.

Examples

See the new example apps added in this PR for usage on SSLSocket and SSLEngine:

examples/provider/PskClientSocket.java
examples/provider/PskServerSocket.java
examples/provider/PskClientEngine.java
examples/provider/PskServerEngine.java

[Copilot]

Pull request overview

Adds JSSE-level PSK configuration support by making WolfSSLParameters usable with standard setSSLParameters() on SSLSocket/SSLEngine, wiring PSK settings into engine setup, and providing tests/examples to validate usage.

Changes:

• Make WolfSSLParameters extend SSLParameters and add PSK-related fields with getters/setters.
• Import/propagate PSK settings through WolfSSLParametersHelper and apply them in WolfSSLEngineHelper.
• Add JUnit coverage and new SSLSocket/SSLEngine PSK example apps + documentation.

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/test/com/wolfssl/provider/jsse/test/WolfSSLParametersPskTest.java	Adds JUnit tests validating PSK configuration via WolfSSLParameters and handshake success.
src/test/com/wolfssl/provider/jsse/test/WolfSSLJSSETestSuite.java	Registers the new PSK test in the overall test suite.
src/java/com/wolfssl/provider/jsse/adapter/WolfSSLJDK8Helper.java	Updates SNI server-name handling to the renamed wolfSSL-specific SNI storage API.
src/java/com/wolfssl/provider/jsse/WolfSSLParametersHelper.java	Imports PSK fields when SSLParameters is actually a WolfSSLParameters.
src/java/com/wolfssl/provider/jsse/WolfSSLParameters.java	Makes parameters interoperable with JSSE APIs and introduces PSK configuration fields.
src/java/com/wolfssl/provider/jsse/WolfSSLEngineHelper.java	Applies PSK callbacks/identity hint/keepArrays from WolfSSLParameters to the native session.
examples/provider/README.md	Documents the new PSK example applications.
examples/provider/PskServerSocket.sh	Adds run script for SSLSocket PSK server example.
examples/provider/PskServerSocket.java	Adds SSLSocket PSK server example using WolfSSLParameters.
examples/provider/PskServerEngine.sh	Adds run script for SSLEngine PSK server example.
examples/provider/PskServerEngine.java	Adds SSLEngine PSK server example using WolfSSLParameters.
examples/provider/PskClientSocket.sh	Adds run script for SSLSocket PSK client example.
examples/provider/PskClientSocket.java	Adds SSLSocket PSK client example using WolfSSLParameters.
examples/provider/PskClientEngine.sh	Adds run script for SSLEngine PSK client example.
examples/provider/PskClientEngine.java	Adds SSLEngine PSK client example using WolfSSLParameters.

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[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 8 comments.

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[Copilot]

Pull request overview

Copilot reviewed 17 out of 17 changed files in this pull request and generated 6 comments.

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[Copilot]

Pull request overview

Copilot reviewed 15 out of 15 changed files in this pull request and generated 3 comments.

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[cconlon]

Will rebase once #343 gets in for failing tests

[Copilot]

Pull request overview

Copilot reviewed 16 out of 16 changed files in this pull request and generated 5 comments.

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