KeyStoreException

ERROR_ATTESTATION_CHALLENGE_TOO_LARGE

static val ERROR_ATTESTATION_CHALLENGE_TOO_LARGE: Int

The attestation challenge specified is too large.

Value: 9

ERROR_ATTESTATION_KEYS_UNAVAILABLE

static val ERROR_ATTESTATION_KEYS_UNAVAILABLE: Int

There are no keys available for attestation. This error is returned only on devices that rely solely on remotely-provisioned keys (see Remote Key Provisioning).

On such a device, if the caller requests key generation and includes an attestation challenge (indicating key attestation is required), the error will be returned in one of the following cases:

• The pool of remotely-provisioned keys has been exhausted.
• The device is not registered with the key provisioning server.

This error is a transient one if the pool of remotely-provisioned keys has been exhausted. However, if the device is not registered with the server, or the key provisioning server refuses key issuance, this is a permanent error.

Value: 16

ERROR_ID_ATTESTATION_FAILURE

static val ERROR_ID_ATTESTATION_FAILURE: Int

The error related to inclusion of device identifiers in the attestation record.

Value: 8

ERROR_INCORRECT_USAGE

static val ERROR_INCORRECT_USAGE: Int

The feature the caller is trying to use is not compatible with the parameters used to generate the key. For example, trying to use a key generated for a different signature algorithm, or a digest not specified during key creation. Another case is the attempt to generate a symmetric AES key and requesting key attestation.

Value: 13

ERROR_INTERNAL_SYSTEM_ERROR

static val ERROR_INTERNAL_SYSTEM_ERROR: Int

An internal system error - refer to isTransientFailure() to determine whether re-trying the operation is likely to yield different results.

Value: 4

ERROR_KEYMINT_FAILURE

static val ERROR_KEYMINT_FAILURE: Int

General error in the KeyMint layer.

Value: 10

ERROR_KEYSTORE_FAILURE

static val ERROR_KEYSTORE_FAILURE: Int

Failure in the Keystore layer.

Value: 11

ERROR_KEYSTORE_UNINITIALIZED

static val ERROR_KEYSTORE_UNINITIALIZED: Int

Indicating that load() has not been called on the Keystore instance, or an attempt has been made to generate an authorization bound key while the user has not set a lock screen knowledge factor (LSKF). Instruct the user to set an LSKF and retry.

Value: 3

ERROR_KEY_CORRUPTED

static val ERROR_KEY_CORRUPTED: Int

The key is corrupted and could not be recovered.

Value: 7

ERROR_KEY_DOES_NOT_EXIST

static val ERROR_KEY_DOES_NOT_EXIST: Int

The key the operation refers to doesn't exist.

Value: 6

ERROR_KEY_NOT_TEMPORALLY_VALID

static val ERROR_KEY_NOT_TEMPORALLY_VALID: Int

The key is not currently valid: Either at has expired or it will be valid for use in the future.

Value: 14

ERROR_KEY_OPERATION_EXPIRED

static val ERROR_KEY_OPERATION_EXPIRED: Int

The crypto object the caller has been using held a reference to a KeyMint operation that has been evacuated (likely due to other concurrent operations taking place). The caller should re-create the crypto object and try again.

Value: 15

ERROR_OTHER

static val ERROR_OTHER: Int

This error code is for mapping errors that the caller will not know about. If the caller is targeting an API level earlier than the one the error was introduced in, then the error will be mapped to this one. In API level 33 no errors map to this error.

Value: 1

ERROR_PERMISSION_DENIED

static val ERROR_PERMISSION_DENIED: Int

The caller has requested key parameters or operation which are only available to system or privileged apps.

Value: 5

ERROR_UNIMPLEMENTED

static val ERROR_UNIMPLEMENTED: Int

The feature the caller is trying to use is not implemented by the underlying KeyMint implementation. This could happen when an unsupported algorithm is requested, or when trying to import a key in a format other than raw or PKCS#8.

Value: 12

ERROR_USER_AUTHENTICATION_REQUIRED

static val ERROR_USER_AUTHENTICATION_REQUIRED: Int

Indicating the key could not be used because the user needs to authenticate first. See android.security.keystore.KeyGenParameterSpec.Builder#setUserAuthenticationRequired(boolean).

Value: 2

RETRY_AFTER_NEXT_REBOOT

static val RETRY_AFTER_NEXT_REBOOT: Int

Re-try the operation that led to this error when the device has a software update downloaded and on the next reboot. The Remote provisioning server recognizes the device, but refuses issuance of attestation keys because it contains a software version that could potentially be vulnerable and needs an update. Re-trying after the device has upgraded and rebooted may alleviate the problem.

This value is returned when isTransientFailure() is true.

Value: 4

RETRY_NEVER

static val RETRY_NEVER: Int

Never re-try the operation that led to this error, since it's a permanent error. This value is always returned when isTransientFailure() is false.

Value: 1

RETRY_WHEN_CONNECTIVITY_AVAILABLE

static val RETRY_WHEN_CONNECTIVITY_AVAILABLE: Int

Re-try the operation that led to this error when the device regains connectivity. Remote provisioning of keys requires reaching the remote server, and the device is currently unable to due that due to lack of network connectivity. This value is returned when isTransientFailure() is true.

Value: 3

RETRY_WITH_EXPONENTIAL_BACKOFF

static val RETRY_WITH_EXPONENTIAL_BACKOFF: Int

Re-try the operation that led to this error with an exponential back-off delay. The first delay should be between 5 to 30 seconds, and each subsequent re-try should double the delay time. This value is returned when isTransientFailure() is true.

Value: 2

getNumericErrorCode

open fun getNumericErrorCode(): Int

Returns one of the error codes exported by the class.

getRetryPolicy

open fun getRetryPolicy(): Int

Returns the re-try policy for transient failures. Valid only if isTransientFailure() returns True.

isSystemError

open fun isSystemError(): Boolean

Indicates whether the error related to the Keystore/KeyMint implementation and not a specific key.

isTransientFailure

open fun isTransientFailure(): Boolean

Returns true if the failure is a transient failure - that is, performing the same operation again at a late time is likely to succeed. If isSystemError() returns true, the transient nature of the failure relates to the device, otherwise relates to the key (so a permanent failure with an existing key likely requires creating another key to repeat the operation with).

requiresUserAuthentication

open fun requiresUserAuthentication(): Boolean

Indicates whether the failure is due to the device being locked.

toString

open fun toString(): String