Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.security.keystore; |
| 18 | |
| 19 | import android.os.Parcelable; |
| 20 | import android.os.Parcel; |
| 21 | |
| 22 | import java.math.BigInteger; |
| 23 | import java.security.spec.AlgorithmParameterSpec; |
| 24 | import java.security.spec.ECGenParameterSpec; |
| 25 | import java.security.spec.RSAKeyGenParameterSpec; |
| 26 | import java.util.Date; |
| 27 | |
| 28 | import javax.security.auth.x500.X500Principal; |
| 29 | |
| 30 | /** |
| 31 | * A parcelable version of KeyGenParameterSpec |
| 32 | * @hide only used for communicating with the DPMS. |
| 33 | */ |
| 34 | public final class ParcelableKeyGenParameterSpec implements Parcelable { |
| 35 | private static final int ALGORITHM_PARAMETER_SPEC_NONE = 1; |
| 36 | private static final int ALGORITHM_PARAMETER_SPEC_RSA = 2; |
| 37 | private static final int ALGORITHM_PARAMETER_SPEC_EC = 3; |
| 38 | |
| 39 | private final KeyGenParameterSpec mSpec; |
| 40 | |
| 41 | public ParcelableKeyGenParameterSpec( |
| 42 | KeyGenParameterSpec spec) { |
| 43 | mSpec = spec; |
| 44 | } |
| 45 | |
| 46 | public int describeContents() { |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | private static void writeOptionalDate(Parcel out, Date date) { |
| 51 | if (date != null) { |
| 52 | out.writeBoolean(true); |
| 53 | out.writeLong(date.getTime()); |
| 54 | } else { |
| 55 | out.writeBoolean(false); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | public void writeToParcel(Parcel out, int flags) { |
| 60 | out.writeString(mSpec.getKeystoreAlias()); |
| 61 | out.writeInt(mSpec.getPurposes()); |
| 62 | out.writeInt(mSpec.getUid()); |
| 63 | out.writeInt(mSpec.getKeySize()); |
| 64 | |
| 65 | // Only needs to support RSAKeyGenParameterSpec and ECGenParameterSpec. |
| 66 | AlgorithmParameterSpec algoSpec = mSpec.getAlgorithmParameterSpec(); |
| 67 | if (algoSpec == null) { |
| 68 | out.writeInt(ALGORITHM_PARAMETER_SPEC_NONE); |
| 69 | } else if (algoSpec instanceof RSAKeyGenParameterSpec) { |
| 70 | RSAKeyGenParameterSpec rsaSpec = (RSAKeyGenParameterSpec) algoSpec; |
| 71 | out.writeInt(ALGORITHM_PARAMETER_SPEC_RSA); |
| 72 | out.writeInt(rsaSpec.getKeysize()); |
| 73 | out.writeByteArray(rsaSpec.getPublicExponent().toByteArray()); |
| 74 | } else if (algoSpec instanceof ECGenParameterSpec) { |
| 75 | ECGenParameterSpec ecSpec = (ECGenParameterSpec) algoSpec; |
| 76 | out.writeInt(ALGORITHM_PARAMETER_SPEC_EC); |
| 77 | out.writeString(ecSpec.getName()); |
| 78 | } else { |
| 79 | throw new IllegalArgumentException( |
| 80 | String.format("Unknown algorithm parameter spec: %s", algoSpec.getClass())); |
| 81 | } |
| 82 | out.writeByteArray(mSpec.getCertificateSubject().getEncoded()); |
| 83 | out.writeByteArray(mSpec.getCertificateSerialNumber().toByteArray()); |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 84 | out.writeLong(mSpec.getCertificateNotBefore().getTime()); |
| 85 | out.writeLong(mSpec.getCertificateNotAfter().getTime()); |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 86 | writeOptionalDate(out, mSpec.getKeyValidityStart()); |
| 87 | writeOptionalDate(out, mSpec.getKeyValidityForOriginationEnd()); |
| 88 | writeOptionalDate(out, mSpec.getKeyValidityForConsumptionEnd()); |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 89 | if (mSpec.isDigestsSpecified()) { |
| 90 | out.writeStringArray(mSpec.getDigests()); |
| 91 | } else { |
| 92 | out.writeStringArray(null); |
| 93 | } |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 94 | out.writeStringArray(mSpec.getEncryptionPaddings()); |
| 95 | out.writeStringArray(mSpec.getSignaturePaddings()); |
| 96 | out.writeStringArray(mSpec.getBlockModes()); |
| 97 | out.writeBoolean(mSpec.isRandomizedEncryptionRequired()); |
| 98 | out.writeBoolean(mSpec.isUserAuthenticationRequired()); |
| 99 | out.writeInt(mSpec.getUserAuthenticationValidityDurationSeconds()); |
| 100 | out.writeByteArray(mSpec.getAttestationChallenge()); |
| 101 | out.writeBoolean(mSpec.isUniqueIdIncluded()); |
| 102 | out.writeBoolean(mSpec.isUserAuthenticationValidWhileOnBody()); |
| 103 | out.writeBoolean(mSpec.isInvalidatedByBiometricEnrollment()); |
| 104 | } |
| 105 | |
| 106 | private static Date readDateOrNull(Parcel in) { |
| 107 | boolean hasDate = in.readBoolean(); |
| 108 | if (hasDate) { |
| 109 | return new Date(in.readLong()); |
| 110 | } else { |
| 111 | return null; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | private ParcelableKeyGenParameterSpec(Parcel in) { |
| 116 | String keystoreAlias = in.readString(); |
| 117 | int purposes = in.readInt(); |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 118 | KeyGenParameterSpec.Builder builder = new KeyGenParameterSpec.Builder( |
| 119 | keystoreAlias, purposes); |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 120 | builder.setUid(in.readInt()); |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 121 | // KeySize is -1 by default, if the KeyGenParameterSpec previously parcelled had the default |
| 122 | // value, do not set it as this will cause setKeySize to throw. |
| 123 | int keySize = in.readInt(); |
| 124 | if (keySize >= 0) { |
| 125 | builder.setKeySize(keySize); |
| 126 | } |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 127 | |
| 128 | int keySpecType = in.readInt(); |
| 129 | AlgorithmParameterSpec algorithmSpec = null; |
| 130 | if (keySpecType == ALGORITHM_PARAMETER_SPEC_NONE) { |
| 131 | algorithmSpec = null; |
| 132 | } else if (keySpecType == ALGORITHM_PARAMETER_SPEC_RSA) { |
| 133 | int rsaKeySize = in.readInt(); |
| 134 | BigInteger publicExponent = new BigInteger(in.createByteArray()); |
| 135 | algorithmSpec = new RSAKeyGenParameterSpec(rsaKeySize, publicExponent); |
| 136 | } else if (keySpecType == ALGORITHM_PARAMETER_SPEC_EC) { |
| 137 | String stdName = in.readString(); |
| 138 | algorithmSpec = new ECGenParameterSpec(stdName); |
| 139 | } else { |
| 140 | throw new IllegalArgumentException( |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 141 | String.format("Unknown algorithm parameter spec: %d", keySpecType)); |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 142 | } |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 143 | if (algorithmSpec != null) { |
| 144 | builder.setAlgorithmParameterSpec(algorithmSpec); |
| 145 | } |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 146 | builder.setCertificateSubject(new X500Principal(in.createByteArray())); |
| 147 | builder.setCertificateSerialNumber(new BigInteger(in.createByteArray())); |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 148 | builder.setCertificateNotBefore(new Date(in.readLong())); |
| 149 | builder.setCertificateNotAfter(new Date(in.readLong())); |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 150 | builder.setKeyValidityStart(readDateOrNull(in)); |
| 151 | builder.setKeyValidityForOriginationEnd(readDateOrNull(in)); |
| 152 | builder.setKeyValidityForConsumptionEnd(readDateOrNull(in)); |
Eran Messeri | 4767054 | 2017-12-09 21:25:04 +0000 | [diff] [blame^] | 153 | String[] digests = in.createStringArray(); |
| 154 | if (digests != null) { |
| 155 | builder.setDigests(digests); |
| 156 | } |
Eran Messeri | 852c8f1 | 2017-11-15 05:55:52 +0000 | [diff] [blame] | 157 | builder.setEncryptionPaddings(in.createStringArray()); |
| 158 | builder.setSignaturePaddings(in.createStringArray()); |
| 159 | builder.setBlockModes(in.createStringArray()); |
| 160 | builder.setRandomizedEncryptionRequired(in.readBoolean()); |
| 161 | builder.setUserAuthenticationRequired(in.readBoolean()); |
| 162 | builder.setUserAuthenticationValidityDurationSeconds(in.readInt()); |
| 163 | builder.setAttestationChallenge(in.createByteArray()); |
| 164 | builder.setUniqueIdIncluded(in.readBoolean()); |
| 165 | builder.setUserAuthenticationValidWhileOnBody(in.readBoolean()); |
| 166 | builder.setInvalidatedByBiometricEnrollment(in.readBoolean()); |
| 167 | mSpec = builder.build(); |
| 168 | } |
| 169 | |
| 170 | public static final Creator<ParcelableKeyGenParameterSpec> CREATOR = new Creator<ParcelableKeyGenParameterSpec>() { |
| 171 | @Override |
| 172 | public ParcelableKeyGenParameterSpec createFromParcel(Parcel in) { |
| 173 | return new ParcelableKeyGenParameterSpec(in); |
| 174 | } |
| 175 | |
| 176 | @Override |
| 177 | public ParcelableKeyGenParameterSpec[] newArray(int size) { |
| 178 | return new ParcelableKeyGenParameterSpec[size]; |
| 179 | } |
| 180 | }; |
| 181 | |
| 182 | public KeyGenParameterSpec getSpec() { |
| 183 | return mSpec; |
| 184 | } |
| 185 | } |