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Checksum

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 is deprecated. 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 is deprecated. 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 is deprecated. 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 is deprecated. 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 timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

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

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, PackageManager.OnChecksumsReadyListener)

Constant Value: 32 (0x00000020)

TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512

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, PackageManager.OnChecksumsReadyListener)

Constant Value: 64 (0x00000040)

TYPE_WHOLE_MD5

public static final int TYPE_WHOLE_MD5

This constant is deprecated.
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, PackageManager.OnChecksumsReadyListener)

Constant Value: 2 (0x00000002)

TYPE_WHOLE_MERKLE_ROOT_4K_SHA256

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, PackageManager.OnChecksumsReadyListener)

Constant Value: 1 (0x00000001)

TYPE_WHOLE_SHA1

public static final int TYPE_WHOLE_SHA1

This constant is deprecated.
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, PackageManager.OnChecksumsReadyListener)

Constant Value: 4 (0x00000004)

TYPE_WHOLE_SHA256

public static final int TYPE_WHOLE_SHA256

This constant is deprecated.
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, PackageManager.OnChecksumsReadyListener)

Constant Value: 8 (0x00000008)

TYPE_WHOLE_SHA512

public static final int TYPE_WHOLE_SHA512

This constant is deprecated.
Not platform enforced. Use platform enforced digests e.g. TYPE_WHOLE_MERKLE_ROOT_4K_SHA256. Provided for completeness' sake and to support legacy usecases.

SHA512 hash computed over all file bytes.

See also:

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

Constant Value: 16 (0x00000010)

Fields

CREATOR

public static final Creator<Checksum> CREATOR

Public constructors

Checksum

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

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

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

public byte[] getValue ()

Checksum value.

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

writeToParcel

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

Interfaces

Classes

Exceptions

Most visited

Recently visited

Results for

Checksum

Summary

Constants

Inherited constants

Fields

Public constructors

Public methods

Inherited methods

Constants

TYPE_PARTIAL_MERKLE_ROOT_1M_SHA256

TYPE_PARTIAL_MERKLE_ROOT_1M_SHA512

TYPE_WHOLE_MD5

TYPE_WHOLE_MERKLE_ROOT_4K_SHA256

TYPE_WHOLE_SHA1

TYPE_WHOLE_SHA256

TYPE_WHOLE_SHA512

Fields

CREATOR

Public constructors

Checksum

Public methods

describeContents

getType

getValue

writeToParcel