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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.content.pm;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.os.Parcel;
import android.os.Parcelable;
import com.android.internal.util.DataClass;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
/**
* A typed checksum.
*
* @see ApkChecksum
* @see PackageManager#requestChecksums
*/
@DataClass(genConstDefs = false)
public final class Checksum implements Parcelable {
/**
* Root SHA256 hash of a 4K Merkle tree computed over all file bytes.
* <a href="https://source.android.com/security/apksigning/v4">See APK Signature Scheme V4</a>.
* <a href="https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git/tree/Documentation/filesystems/fsverity.rst">See fs-verity</a>.
*
* Recommended for all new applications.
* Can be used by kernel to enforce authenticity and integrity of the APK.
* <a href="https://git.kernel.org/pub/scm/fs/fscrypt/fscrypt.git/tree/Documentation/filesystems/fsverity.rst#">See fs-verity for details</a>
*
* @see PackageManager#requestChecksums
*/
public static final int TYPE_WHOLE_MERKLE_ROOT_4K_SHA256 = 0x00000001;
/**
* MD5 hash computed over all file bytes.
*
* @see PackageManager#requestChecksums
* @deprecated Not platform enforced. Cryptographically broken and unsuitable for further use.
* Use platform enforced digests e.g. {@link #TYPE_WHOLE_MERKLE_ROOT_4K_SHA256}.
* Provided for completeness' sake and to support legacy usecases.
*/
@Deprecated
public static final int TYPE_WHOLE_MD5 = 0x00000002;
/**
* SHA1 hash computed over all file bytes.
*
* @see PackageManager#requestChecksums
* @deprecated Not platform enforced. Broken and should not be used.
* Use platform enforced digests e.g. {@link #TYPE_WHOLE_MERKLE_ROOT_4K_SHA256}.
* Provided for completeness' sake and to support legacy usecases.
*/
@Deprecated
public static final int TYPE_WHOLE_SHA1 = 0x00000004;
/**
* SHA256 hash computed over all file bytes.
* @deprecated Not platform enforced.
* Use platform enforced digests e.g. {@link #TYPE_WHOLE_MERKLE_ROOT_4K_SHA256}.
* Provided for completeness' sake and to support legacy usecases.
*
* @see PackageManager#requestChecksums
*/
@Deprecated
public static final int TYPE_WHOLE_SHA256 = 0x00000008;
/**
* SHA512 hash computed over all file bytes.
* @deprecated Not platform enforced.
* Use platform enforced digests e.g. {@link #TYPE_WHOLE_MERKLE_ROOT_4K_SHA256}.
* Provided for completeness' sake and to support legacy usecases.
*
* @see PackageManager#requestChecksums
*/
@Deprecated
public static final int TYPE_WHOLE_SHA512 = 0x00000010;
/**
* Root SHA256 hash of a 1M Merkle tree computed over protected content.
* Excludes signing block.
* <a href="https://source.android.com/security/apksigning/v2">See APK Signature Scheme V2</a>.
*
* @see PackageManager#requestChecksums
*/
public static final int TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256 = 0x00000020;
/**
* Root SHA512 hash of a 1M Merkle tree computed over protected content.
* Excludes signing block.
* <a href="https://source.android.com/security/apksigning/v2">See APK Signature Scheme V2</a>.
*
* @see PackageManager#requestChecksums
*/
public static final int TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512 = 0x00000040;
/** @hide */
@IntDef(prefix = {"TYPE_"}, value = {
TYPE_WHOLE_MERKLE_ROOT_4K_SHA256,
TYPE_WHOLE_MD5,
TYPE_WHOLE_SHA1,
TYPE_WHOLE_SHA256,
TYPE_WHOLE_SHA512,
TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256,
TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512,
})
@Retention(RetentionPolicy.SOURCE)
public @interface Type {}
/** @hide */
@IntDef(flag = true, prefix = {"TYPE_"}, value = {
TYPE_WHOLE_MERKLE_ROOT_4K_SHA256,
TYPE_WHOLE_MD5,
TYPE_WHOLE_SHA1,
TYPE_WHOLE_SHA256,
TYPE_WHOLE_SHA512,
TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256,
TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512,
})
@Retention(RetentionPolicy.SOURCE)
public @interface TypeMask {}
/**
* Serialize checksum to the stream in binary format.
* @hide
*/
public static void writeToStream(@NonNull DataOutputStream dos, @NonNull Checksum checksum)
throws IOException {
dos.writeInt(checksum.getType());
final byte[] valueBytes = checksum.getValue();
dos.writeInt(valueBytes.length);
dos.write(valueBytes);
}
/**
* Deserialize checksum previously stored in
* {@link #writeToStream(DataOutputStream, Checksum)}.
* @hide
*/
public static @NonNull Checksum readFromStream(@NonNull DataInputStream dis)
throws IOException {
final int type = dis.readInt();
final byte[] valueBytes = new byte[dis.readInt()];
dis.read(valueBytes);
return new Checksum(type, valueBytes);
}
/**
* Checksum type.
*/
private final @Checksum.Type int mType;
/**
* Checksum value.
*/
private final @NonNull byte[] mValue;
// Code below generated by codegen v1.0.23.
//
// DO NOT MODIFY!
// CHECKSTYLE:OFF Generated code
//
// To regenerate run:
// $ codegen $ANDROID_BUILD_TOP/frameworks/base/core/java/android/content/pm/Checksum.java
//
// To exclude the generated code from IntelliJ auto-formatting enable (one-time):
// Settings > Editor > Code Style > Formatter Control
//@formatter:off
/**
* Creates a new Checksum.
*
* @param type
* Checksum type.
* @param value
* Checksum value.
*/
@DataClass.Generated.Member
public Checksum(
@Checksum.Type int type,
@NonNull byte[] value) {
this.mType = type;
com.android.internal.util.AnnotationValidations.validate(
Checksum.Type.class, null, mType);
this.mValue = value;
com.android.internal.util.AnnotationValidations.validate(
NonNull.class, null, mValue);
// onConstructed(); // You can define this method to get a callback
}
/**
* Checksum type.
*/
@DataClass.Generated.Member
public @Checksum.Type int getType() {
return mType;
}
/**
* Checksum value.
*/
@DataClass.Generated.Member
public @NonNull byte[] getValue() {
return mValue;
}
@Override
@DataClass.Generated.Member
public void writeToParcel(@NonNull Parcel dest, int flags) {
// You can override field parcelling by defining methods like:
// void parcelFieldName(Parcel dest, int flags) { ... }
dest.writeInt(mType);
dest.writeByteArray(mValue);
}
@Override
@DataClass.Generated.Member
public int describeContents() { return 0; }
/** @hide */
@SuppressWarnings({"unchecked", "RedundantCast"})
@DataClass.Generated.Member
/* package-private */ Checksum(@NonNull Parcel in) {
// You can override field unparcelling by defining methods like:
// static FieldType unparcelFieldName(Parcel in) { ... }
int type = in.readInt();
byte[] value = in.createByteArray();
this.mType = type;
com.android.internal.util.AnnotationValidations.validate(
Checksum.Type.class, null, mType);
this.mValue = value;
com.android.internal.util.AnnotationValidations.validate(
NonNull.class, null, mValue);
// onConstructed(); // You can define this method to get a callback
}
@DataClass.Generated.Member
public static final @NonNull Parcelable.Creator<Checksum> CREATOR
= new Parcelable.Creator<Checksum>() {
@Override
public Checksum[] newArray(int size) {
return new Checksum[size];
}
@Override
public Checksum createFromParcel(@NonNull Parcel in) {
return new Checksum(in);
}
};
@DataClass.Generated(
time = 1619810358402L,
codegenVersion = "1.0.23",
sourceFile = "frameworks/base/core/java/android/content/pm/Checksum.java",
inputSignatures = "public static final int TYPE_WHOLE_MERKLE_ROOT_4K_SHA256\npublic static final @java.lang.Deprecated int TYPE_WHOLE_MD5\npublic static final @java.lang.Deprecated int TYPE_WHOLE_SHA1\npublic static final @java.lang.Deprecated int TYPE_WHOLE_SHA256\npublic static final @java.lang.Deprecated int TYPE_WHOLE_SHA512\npublic static final int TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256\npublic static final int TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512\nprivate final @android.content.pm.Checksum.Type int mType\nprivate final @android.annotation.NonNull byte[] mValue\npublic static void writeToStream(java.io.DataOutputStream,android.content.pm.Checksum)\npublic static @android.annotation.NonNull android.content.pm.Checksum readFromStream(java.io.DataInputStream)\nclass Checksum extends java.lang.Object implements [android.os.Parcelable]\n@com.android.internal.util.DataClass(genConstDefs=false)")
@Deprecated
private void __metadata() {}
//@formatter:on
// End of generated code
}
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