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package org.sufficientlysecure.keychain.provider;
import android.net.Uri;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.pgp.KeyRing;
import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
import org.sufficientlysecure.keychain.util.Log;
/** This implementation of KeyRing provides a cached view of PublicKeyRing
* objects based on database queries exclusively.
*
* This class should be used where only few points of data but no actual
* cryptographic operations are required about a PublicKeyRing which is already
* in the database. This happens commonly in UI code, where parsing of a PGP
* key for examination would be a very expensive operation.
*
* Each getter method is implemented using a more or less expensive database
* query, while object construction is (almost) free. A common pattern is
* mProviderHelper.getCachedKeyRing(uri).getterMethod()
*
* TODO Ensure that the values returned here always match the ones returned by
* the parsed KeyRing!
*
*/
public class CachedPublicKeyRing extends KeyRing {
final ProviderHelper mProviderHelper;
final Uri mUri;
public CachedPublicKeyRing(ProviderHelper providerHelper, Uri uri) {
mProviderHelper = providerHelper;
mUri = uri;
}
public long getMasterKeyId() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.MASTER_KEY_ID, ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data;
} catch (ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
/**
* Find the master key id related to a given query. The id will either be extracted from the
* query, which should work for all specific /key_rings/ queries, or will be queried if it can't.
*/
public long extractOrGetMasterKeyId() throws PgpGeneralException {
// try extracting from the uri first
String firstSegment = mUri.getPathSegments().get(1);
if (!firstSegment.equals("find")) try {
return Long.parseLong(firstSegment);
} catch (NumberFormatException e) {
// didn't work? oh well.
Log.d(Constants.TAG, "Couldn't get masterKeyId from URI, querying...");
}
return getMasterKeyId();
}
public String getPrimaryUserId() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.USER_ID,
ProviderHelper.FIELD_TYPE_STRING);
return (String) data;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public String getPrimaryUserIdWithFallback() throws PgpGeneralException {
return getPrimaryUserId();
}
public boolean isRevoked() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.IS_REVOKED,
ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data > 0;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public boolean canCertify() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.CAN_CERTIFY,
ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data > 0;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public long getEncryptId() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.MASTER_KEY_ID, // TODO
ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public boolean hasEncrypt() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.CAN_ENCRYPT, // TODO
ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data > 0;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public long getSignId() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.MASTER_KEY_ID, // TODO
ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public boolean hasSign() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.CAN_SIGN, // TODO
ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data > 0;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public int getVerified() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.VERIFIED,
ProviderHelper.FIELD_TYPE_INTEGER);
return (Integer) data;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
public boolean hasAnySecret() throws PgpGeneralException {
try {
Object data = mProviderHelper.getGenericData(mUri,
KeychainContract.KeyRings.HAS_ANY_SECRET,
ProviderHelper.FIELD_TYPE_INTEGER);
return (Long) data > 0;
} catch(ProviderHelper.NotFoundException e) {
throw new PgpGeneralException(e);
}
}
}
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