104 lines
3.4 KiB
Java
104 lines
3.4 KiB
Java
/*
|
|
* Copyright (C) 2017 Schürmann & Breitmoser GbR
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package org.sufficientlysecure.keychain.securitytoken;
|
|
|
|
import org.bouncycastle.bcpg.PublicKeyAlgorithmTags;
|
|
import org.sufficientlysecure.keychain.service.SaveKeyringParcel;
|
|
import org.sufficientlysecure.keychain.service.SaveKeyringParcel.SubkeyAdd;
|
|
|
|
|
|
// 4.3.3.6 Algorithm Attributes
|
|
public class RSAKeyFormat extends KeyFormat {
|
|
private int mModulusLength;
|
|
private int mExponentLength;
|
|
private RSAAlgorithmFormat mRSAAlgorithmFormat;
|
|
|
|
public RSAKeyFormat(int modulusLength,
|
|
int exponentLength,
|
|
RSAAlgorithmFormat rsaAlgorithmFormat) {
|
|
super(KeyFormatType.RSAKeyFormatType);
|
|
mModulusLength = modulusLength;
|
|
mExponentLength = exponentLength;
|
|
mRSAAlgorithmFormat = rsaAlgorithmFormat;
|
|
}
|
|
|
|
public int getModulusLength() {
|
|
return mModulusLength;
|
|
}
|
|
|
|
public int getExponentLength() {
|
|
return mExponentLength;
|
|
}
|
|
|
|
public static KeyFormat fromBytes(byte[] bytes) {
|
|
if (bytes.length < 6) {
|
|
throw new IllegalArgumentException("Bad length for RSA attributes");
|
|
}
|
|
return new RSAKeyFormat(bytes[1] << 8 | bytes[2],
|
|
bytes[3] << 8 | bytes[4],
|
|
RSAKeyFormat.RSAAlgorithmFormat.from(bytes[5]));
|
|
}
|
|
|
|
public RSAAlgorithmFormat getAlgorithmFormat() {
|
|
return mRSAAlgorithmFormat;
|
|
}
|
|
|
|
public enum RSAAlgorithmFormat {
|
|
STANDARD((byte) 0x00, false, false),
|
|
STANDARD_WITH_MODULUS((byte) 0x01, false, true),
|
|
CRT((byte) 0x02, true, false),
|
|
CRT_WITH_MODULUS((byte) 0x03, true, true);
|
|
|
|
private byte mImportFormat;
|
|
private boolean mIncludeModulus;
|
|
private boolean mIncludeCrt;
|
|
|
|
RSAAlgorithmFormat(byte importFormat, boolean includeCrt, boolean includeModulus) {
|
|
mImportFormat = importFormat;
|
|
mIncludeModulus = includeModulus;
|
|
mIncludeCrt = includeCrt;
|
|
}
|
|
|
|
public static RSAAlgorithmFormat from(byte importFormatByte) {
|
|
for (RSAAlgorithmFormat format : values()) {
|
|
if (format.mImportFormat == importFormatByte) {
|
|
return format;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public byte getImportFormat() {
|
|
return mImportFormat;
|
|
}
|
|
|
|
public boolean isIncludeModulus() {
|
|
return mIncludeModulus;
|
|
}
|
|
|
|
public boolean isIncludeCrt() {
|
|
return mIncludeCrt;
|
|
}
|
|
}
|
|
|
|
public void addToSaveKeyringParcel(SaveKeyringParcel.Builder builder, int keyFlags) {
|
|
builder.addSubkeyAdd(SubkeyAdd.createSubkeyAdd(SaveKeyringParcel.Algorithm.RSA,
|
|
mModulusLength, null, keyFlags, 0L));
|
|
}
|
|
}
|