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Add pem-api module: PEMDecoder/PEMEncoder (JEP 538 preview on JDK 27, JEP 542 final in JDK 28) for JWT keys, TLS, encrypted keys and BouncyCastle migration

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01CifR2BE7PBvRy5hT8TS9oz
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asmhatre
2026-10-26 01:50:05 +00:00
co-authored by Claude Sonnet 5.5
parent c3cc57f482
commit 2e25042a68
34 changed files with 895 additions and 0 deletions
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pem-api/src/Fx.java
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import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
/** Tiny helper shared by the demos: read a fixture, print a section header, assert. */
final class Fx {
static final Path DIR = Path.of(System.getProperty("fixtures", "fixtures"));
static String read(String name) {
try { return Files.readString(DIR.resolve(name)); }
catch (IOException e) { throw new RuntimeException(e); }
}
static void h(String s) { System.out.println("== " + s); }
static void check(boolean ok, String what) {
if (!ok) throw new AssertionError(what);
System.out.println("ok: " + what);
}
/** Run, and print the exception class and message instead of a stack trace. */
static void tryIt(String label, java.util.concurrent.Callable<Object> c) {
try {
Object o = c.call();
System.out.println(label + " -> " + describe(o));
} catch (Throwable t) {
System.out.println(label + " !! " + t);
}
}
static String describe(Object o) {
if (o instanceof java.security.PEM p) return "PEM(type=" + p.type() + ") - NOT decoded";
if (o instanceof java.security.KeyPair) return "KeyPair";
if (o instanceof java.security.PrivateKey k) return "PrivateKey " + k.getAlgorithm();
if (o instanceof java.security.PublicKey k) return "PublicKey " + k.getAlgorithm();
if (o instanceof java.security.cert.X509Certificate c) return "X509Certificate " + c.getSubjectX500Principal();
if (o instanceof javax.crypto.EncryptedPrivateKeyInfo e) return "EncryptedPrivateKeyInfo " + e.getAlgName();
return String.valueOf(o);
}
}