66 lines
2.8 KiB
Java
66 lines
2.8 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.securitytoken;
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import org.bouncycastle.bcpg.PublicKeyAlgorithmTags;
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import org.sufficientlysecure.keychain.service.SaveKeyringParcel;
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import org.sufficientlysecure.keychain.ui.CreateSecurityTokenAlgorithmFragment;
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public abstract class KeyFormat {
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public static KeyFormat fromBytes(byte[] bytes) {
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switch (bytes[0]) {
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case PublicKeyAlgorithmTags.RSA_GENERAL:
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return RsaKeyFormat.getInstanceFromBytes(bytes);
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case PublicKeyAlgorithmTags.ECDH:
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case PublicKeyAlgorithmTags.ECDSA:
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case PublicKeyAlgorithmTags.EDDSA:
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return EcKeyFormat.getInstanceFromBytes(bytes);
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default:
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throw new IllegalArgumentException("Unsupported Algorithm id " + bytes[0]);
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}
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}
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public abstract byte[] toBytes(KeyType slot);
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public static KeyFormat fromCreationKeyType(CreateSecurityTokenAlgorithmFragment.SupportedKeyType t, boolean forEncryption) {
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final int elen = 17; //65537
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final int algorithmId = forEncryption ? PublicKeyAlgorithmTags.ECDH : PublicKeyAlgorithmTags.ECDSA;
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switch (t) {
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case RSA_2048:
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return RsaKeyFormat.getInstance(2048, elen, RsaKeyFormat.RsaImportFormat.CRT_WITH_MODULUS);
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case RSA_3072:
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return RsaKeyFormat.getInstance(3072, elen, RsaKeyFormat.RsaImportFormat.CRT_WITH_MODULUS);
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case RSA_4096:
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return RsaKeyFormat.getInstance(4096, elen, RsaKeyFormat.RsaImportFormat.CRT_WITH_MODULUS);
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case ECC_P256:
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return EcKeyFormat.getInstance(algorithmId, EcObjectIdentifiers.NIST_P_256, true);
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case ECC_P384:
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return EcKeyFormat.getInstance(algorithmId, EcObjectIdentifiers.NIST_P_384, true);
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case ECC_P521:
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return EcKeyFormat.getInstance(algorithmId, EcObjectIdentifiers.NIST_P_521, true);
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}
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throw new IllegalArgumentException("Unsupported Algorithm id " + t);
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}
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public abstract void addToSaveKeyringParcel(SaveKeyringParcel.Builder builder, int keyFlags);
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}
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