@Override
public TitanGuid getDataId() {
if (this.dataId == null) {
//
// Hash together everything that distinguishes this profile from any
// other object stored in Beehive. (Since the cachedId field is
// derived from the name field, it's not included.)
//
TitanGuid id = new TitanGuidImpl(this.name.getBytes());
id = id.add(this.encryptedPrivateKey);
this.dataId = id.add(this.publicKey.getEncoded());
}
return this.dataId;
}
/**
* Verify that a given {@code Signature} was signed by this {@code Credential}.
*
* @param signature the signature object to verify
* @param ids the array of object ids which the signature is purported to have signed
* @return true if this {@code Credential} can verify that the {@code Signature} object's digital
* signature does correctly sign the object ids listed
* @throws Credential.Exception
*/
public boolean verify(Credential.Signature signature, TitanGuid... ids)
throws Credential.Exception {
try {
java.security.Signature verifier =
java.security.Signature.getInstance(signature.getAlgorithm());
verifier.initVerify(this.publicKey);
for (TitanGuid id : ids) {
if (id != null) verifier.update(id.getBytes());
}
return verifier.verify(signature.getSignature());
} catch (GeneralSecurityException e) {
throw new Credential.Exception(e);
}
}
/**
* Sign the collection of {@link TitanGuid} instances using this profile's private key.
*
* @param password the password needed access the encrypted private key
* @param ids the list of object ids to sign
* @return a {@code Signature} object containing the digital signature
* @throws Credential.Exception encapsulating a {@link GeneralSecurityException} instance thrown
* by the underlying {@link java.security.Signature} system.
*/
public Credential.Signature sign(char[] password, TitanGuid... ids) throws Credential.Exception {
try {
String algorithm = Profile_.DIGITAL_SIGNATURE_ALGORITHM;
java.security.Signature sign = java.security.Signature.getInstance(algorithm);
sign.initSign(this.getPrivateKey(password));
for (TitanGuid id : ids) {
if (id != null) sign.update(id.getBytes());
}
return new Credential.Signature(this.getObjectId(), sign.getAlgorithm(), sign.sign());
} catch (GeneralSecurityException e) {
throw new Credential.Exception(e);
}
}