Added in API level 31

Checksum

Kotlin |Java

public final class Checksum
extends Object implements Parcelable

java.lang.Object
↳	android.content.pm.Checksum

A typed checksum.

See also:

Summary

Constants
`int`	`TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256` Root SHA256 hash of a 1M Merkle tree computed over protected content.
`int`	`TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512` Root SHA512 hash of a 1M Merkle tree computed over protected content.
`int`	`TYPE_WHOLE_MD5` This constant was deprecated in API level 31. Not platform enforced. Cryptographically broken and unsuitable for further use. Use platform enforced digests e.g. `TYPE_WHOLE_MERKLE_ROOT_4K_SHA256`. Provided for completeness' sake and to support legacy usecases.
`int`	`TYPE_WHOLE_MERKLE_ROOT_4K_SHA256` Root SHA256 hash of a 4K Merkle tree computed over all file bytes.
`int`	`TYPE_WHOLE_SHA1` This constant was deprecated in API level 31. Not platform enforced. Broken and should not be used. Use platform enforced digests e.g. `TYPE_WHOLE_MERKLE_ROOT_4K_SHA256`. Provided for completeness' sake and to support legacy usecases.
`int`	`TYPE_WHOLE_SHA256` This constant was deprecated in API level 31. Not platform enforced. Use platform enforced digests e.g. `TYPE_WHOLE_MERKLE_ROOT_4K_SHA256`. Provided for completeness' sake and to support legacy usecases.
`int`	`TYPE_WHOLE_SHA512` This constant was deprecated in API level 31. Not platform enforced. Use platform enforced digests e.g. `TYPE_WHOLE_MERKLE_ROOT_4K_SHA256`. Provided for completeness' sake and to support legacy usecases.

Inherited constants

From interface android.os.Parcelable

`int`	`CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int`	`PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

Fields
`public static final Creator<Checksum>`	`CREATOR`

Public constructors
`Checksum(int type, byte[] value)` Creates a new Checksum.

Public methods
`int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`int`	`getType()` Checksum type.
`byte[]`	`getValue()` Checksum value.
`void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          android.os.Parcelable

`abstract int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void`	`writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

Constants

TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256

Added in API level 31

public static final int TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256

Root SHA256 hash of a 1M Merkle tree computed over protected content. Excludes signing block. See APK Signature Scheme V2.

See also:

PackageManager.requestChecksums(String, boolean, int, List, OnChecksumsReadyListener)

Constant Value: 32 (0x00000020)

TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512

Added in API level 31

public static final int TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512

Root SHA512 hash of a 1M Merkle tree computed over protected content. Excludes signing block. See APK Signature Scheme V2.

See also:

PackageManager.requestChecksums(String, boolean, int, List, OnChecksumsReadyListener)

Constant Value: 64 (0x00000040)

TYPE_WHOLE_MD5

Added in API level 31
Deprecated in API level 31

public static final int TYPE_WHOLE_MD5

This constant was deprecated in API level 31.
Not platform enforced. Cryptographically broken and unsuitable for further use. Use platform enforced digests e.g. TYPE_WHOLE_MERKLE_ROOT_4K_SHA256. Provided for completeness' sake and to support legacy usecases.

MD5 hash computed over all file bytes.

See also:

PackageManager.requestChecksums(String, boolean, int, List, OnChecksumsReadyListener)

Constant Value: 2 (0x00000002)

TYPE_WHOLE_MERKLE_ROOT_4K_SHA256

Added in API level 31

public static final int TYPE_WHOLE_MERKLE_ROOT_4K_SHA256

Root SHA256 hash of a 4K Merkle tree computed over all file bytes. See APK Signature Scheme V4. See fs-verity. Recommended for all new applications. Can be used by kernel to enforce authenticity and integrity of the APK. See fs-verity for details

See also:

PackageManager.requestChecksums(String, boolean, int, List, OnChecksumsReadyListener)

Constant Value: 1 (0x00000001)

TYPE_WHOLE_SHA1

Added in API level 31
Deprecated in API level 31

public static final int TYPE_WHOLE_SHA1

This constant was deprecated in API level 31.
Not platform enforced. Broken and should not be used. Use platform enforced digests e.g. TYPE_WHOLE_MERKLE_ROOT_4K_SHA256. Provided for completeness' sake and to support legacy usecases.

SHA1 hash computed over all file bytes.

See also:

PackageManager.requestChecksums(String, boolean, int, List, OnChecksumsReadyListener)

Constant Value: 4 (0x00000004)

TYPE_WHOLE_SHA256

Added in API level 31
Deprecated in API level 31

public static final int TYPE_WHOLE_SHA256

This constant was deprecated in API level 31.
Not platform enforced. Use platform enforced digests e.g. TYPE_WHOLE_MERKLE_ROOT_4K_SHA256. Provided for completeness' sake and to support legacy usecases.

SHA256 hash computed over all file bytes.

See also:

PackageManager.requestChecksums(String, boolean, int, List, OnChecksumsReadyListener)

Constant Value: 8 (0x00000008)

TYPE_WHOLE_SHA512

Added in API level 31
Deprecated in API level 31

public static final int TYPE_WHOLE_SHA512

SHA512 hash computed over all file bytes.

See also:

PackageManager.requestChecksums(String, boolean, int, List, OnChecksumsReadyListener)

Constant Value: 16 (0x00000010)

Fields

CREATOR

Added in API level 31

public static final Creator<Checksum> CREATOR

Public constructors

Checksum

Added in API level 31

public Checksum (int type, 
                byte[] value)

Creates a new Checksum.

Parameters
`type`	`int`: Checksum type. Value is `TYPE_WHOLE_MERKLE_ROOT_4K_SHA256`, `TYPE_WHOLE_MD5`, `TYPE_WHOLE_SHA1`, `TYPE_WHOLE_SHA256`, `TYPE_WHOLE_SHA512`, `TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256`, or `TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512`
`value`	`byte`: Checksum value. This value cannot be `null`.

Public methods

describeContents

Added in API level 31

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
`int`	a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or `CONTENTS_FILE_DESCRIPTOR`

getType

Added in API level 31

public int getType ()

Checksum type.

Returns
`int`	Value is `TYPE_WHOLE_MERKLE_ROOT_4K_SHA256`, `TYPE_WHOLE_MD5`, `TYPE_WHOLE_SHA1`, `TYPE_WHOLE_SHA256`, `TYPE_WHOLE_SHA512`, `TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256`, or `TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512`

getValue

Added in API level 31

public byte[] getValue ()

Checksum value.

Returns
`byte[]`	This value cannot be `null`.

writeToParcel

Added in API level 31

public void writeToParcel (Parcel dest, 
                int flags)

Flatten this object in to a Parcel.

Parameters
`dest`	`Parcel`: This value cannot be `null`.
`flags`	`int`: Additional flags about how the object should be written. May be 0 or `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES