I have been trying to create, encode, store, retrieve, and decode a Bouncy Castle PGP public key. I get what appears to be the wrong output and an EOFException when I try to read the key back in. The key will be stored in a database as a string.
The original RSA encryption public key is extracted from the key ring as follows:
@SuppressWarnings("unchecked")
public PGPPublicKey getPublicKey() {
PGPPublicKey pk = null;
Iterator<PGPPublicKey> it = publicKeyRing.getPublicKeys();
while (pk == null && it.hasNext()) {
PGPPublicKey key = it.next();
if (key.isEncryptionKey()) {
pk = key;
}
}
return pk;
}
It is encoded, ASCII armored, and stored as a string as follows:
PGPPublicKey contactPK = realContact.getPublicKey();
ByteArrayOutputStream out = new ByteArrayOutputStream();
ArmoredOutputStream armored = new ArmoredOutputStream(out);
contactPK.encode(armored);
armored.close();
publicKey = new String(out.toByteArray(), Charset.forName("US-ASCII"));
This gets me a PGP message block where I would expect a PGP public key block:
-----BEGIN PGP MESSAGE-----\nVersion: BCPG v1.50\n\nuQINBFO8StkCEACQ4vrDnBTDjEvQkGwrAHuJSBZL8tNLxhZ9B74afhObhLVzW6ZB\nT3pk/5XcSPOTvcWd9k1yOKJUabCuF5ixFmMz+niFqUVQTtnl7aqOZ+GrDEzmoYmG\nNQROP0EiA1TWtm2+Ja0FqiJauXytt1sIF/Pr5L47FCjtmZKVoXTP8RVFfGLPB0kT\ndjOz53PaEE3GSValh85w24XIH2/gczURUnjphCX1bRwTFr14SfA9X/rFWqv9SqWQ\nV8OiIWrSiwNd5RLJ9q0B+viDzoxrjmnMJZikxhKiuNVKJCu2ccBdMrbW42iBM2w3\n
... (for brevity)
\n-----END PGP MESSAGE-----
When I try to read the string back in to recreate the public key, I get an EOFException:
// Import the public key.
ByteArrayInputStream in =
new ByteArrayInputStream(stored.publicKey.getBytes(
Charset.forName("US-ASCII")));
// Needed to read ASCII armored keys
InputStream decoded = PGPUtil.getDecoderStream(in);
BCPGInputStream bcpgIn = new BCPGInputStream(decoded);
RSAPublicBCPGKey bcpgKey = new RSAPublicBCPGKey(bcpgIn);
PublicKeyPacket pkPacket = new PublicKeyPacket(PublicKeyAlgorithmTags.RSA_ENCRYPT,
new Date(), bcpgKey);
publicKey = new PGPPublicKey(pkPacket, new BcKeyFingerprintCalculator());
The exception occurs when I create the RSAPublicBCPGKey.
I am doing something very wrong, but I can't figure out what it is. Can anyone help?
Say you already have your pgp public key (ascii armored) in a String str:
InputStream in=new ByteArrayInputStream(str.getBytes());
in = org.bouncycastle.openpgp.PGPUtil.getDecoderStream(in);
JcaPGPPublicKeyRingCollection pgpPub = new JcaPGPPublicKeyRingCollection(in);
in.close();
PGPPublicKey key = null;
Iterator<PGPPublicKeyRing> rIt = pgpPub.getKeyRings();
while (key == null && rIt.hasNext())
{
PGPPublicKeyRing kRing = rIt.next();
Iterator<PGPPublicKey> kIt = kRing.getPublicKeys();
while (key == null && kIt.hasNext())
{
PGPPublicKey k = kIt.next();
if (k.isEncryptionKey())
{
key = k;
}
}
}
return key;
Now, your variable key will have your PGPPublicKey.
I ran into this issue, and it turned out that the Public Key Ring was actually the public key itself. When I was running the iterator I was actually getting subkeys (which turns into that message block instead of the public key block). If I'm not explaining that well, check out this explanation.
Assuming realContact
is a public key ring that only contains subkeys, you don't actually need to run it through getPublicKey()
.
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