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Summary: Ctors | Methods | Inherited Methods

BiometricPrompt.CryptoObject

public static final class BiometricPrompt.CryptoObject
extends Object

java.lang.Object
↳	android.hardware.biometrics.BiometricPrompt.CryptoObject

A wrapper class for the cryptographic operations supported by BiometricPrompt.

Currently the framework supports Signature, Cipher, Mac, and IdentityCredential.

Cryptographic operations in Android can be split into two categories: auth-per-use and time-based. This is specified during key creation via the timeout parameter of the setUserAuthenticationParameters(int, int) method of KeyGenParameterSpec.Builder.

CryptoObjects are used to unlock auth-per-use keys via BiometricPrompt#authenticate(CryptoObject, CancellationSignal, Executor, AuthenticationCallback), whereas time-based keys are unlocked for their specified duration any time the user authenticates with the specified authenticators (e.g. unlocking keyguard). If a time-based key is not available for use (i.e. none of the allowed authenticators have been unlocked recently), applications can prompt the user to authenticate via BiometricPrompt#authenticate(CancellationSignal, Executor, AuthenticationCallback)

See also:

BiometricPrompt.Builder.setAllowedAuthenticators(int)

Summary

Public constructors
`CryptoObject(Signature signature)`
`CryptoObject(Cipher cipher)`
`CryptoObject(Mac mac)`
`CryptoObject(IdentityCredential credential)`

Public methods
`Cipher`	`getCipher()` Get `Cipher` object.
`IdentityCredential`	`getIdentityCredential()` Get `IdentityCredential` object.
`Mac`	`getMac()` Get `Mac` object.
`Signature`	`getSignature()` Get `Signature` object.

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.

Public constructors

CryptoObject

public CryptoObject (Signature signature)

Parameters
`signature`	`Signature`: This value cannot be `null`.

CryptoObject

public CryptoObject (Cipher cipher)

Parameters
`cipher`	`Cipher`: This value cannot be `null`.

CryptoObject

public CryptoObject (Mac mac)

Parameters
`mac`	`Mac`: This value cannot be `null`.

CryptoObject

public CryptoObject (IdentityCredential credential)

Parameters
`credential`	`IdentityCredential`: This value cannot be `null`.

Public methods

getCipher

public Cipher getCipher ()

Get Cipher object.

Returns
`Cipher`	`Cipher` object or null if this doesn't contain one.

getIdentityCredential

public IdentityCredential getIdentityCredential ()

Get IdentityCredential object.

Returns
`IdentityCredential`	`IdentityCredential` object or null if this doesn't contain one.

getMac

public Mac getMac ()

Get Mac object.

Returns
`Mac`	`Mac` object or null if this doesn't contain one.

getSignature

public Signature getSignature ()

Get Signature object.

Returns
`Signature`	`Signature` object or null if this doesn't contain one.

Interfaces

Classes

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Results for

BiometricPrompt.CryptoObject

Summary

Public constructors

Public methods

Inherited methods

Public constructors

CryptoObject

CryptoObject

CryptoObject

CryptoObject

Public methods

getCipher

getIdentityCredential

getMac

getSignature