java.lang.Object
- javacard.security.KeyBuilder

```
public class KeyBuilder
extends Object
```
The KeyBuilder class is a key object factory.

Field Summary

Fields
Modifier and Type	Field	Description
`static byte`	`ALG_TYPE_AES`	Algorithmic key type `ALG_TYPE_AES` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_DES`	Algorithmic key type `ALG_TYPE_DES` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_DH_PARAMETERS`	Algorithmic key type `ALG_TYPE_DH_PARAMETERS` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_DH_PRIVATE`	Algorithmic key type `ALG_TYPE_DH_PRIVATE` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_DH_PUBLIC`	Algorithmic key type `ALG_TYPE_DH_PUBLIC` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_DSA_PARAMETERS`	Algorithmic key type `ALG_TYPE_DSA_PARAMETERS` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_DSA_PRIVATE`	Algorithmic key type `ALG_TYPE_DSA_PRIVATE` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_DSA_PUBLIC`	Algorithmic key type `ALG_TYPE_DSA_PUBLIC` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_EC_F2M_PARAMETERS`	Algorithmic key type `ALG_TYPE_EC_F2M_PARAMETERS` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_EC_F2M_PRIVATE`	Algorithmic key type `ALG_TYPE_EC_F2M_PRIVATE` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_EC_F2M_PUBLIC`	Algorithmic key type `ALG_TYPE_EC_F2M_PUBLIC` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_EC_FP_PARAMETERS`	Algorithmic key type `ALG_TYPE_EC_FP_PARAMETERS` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_EC_FP_PRIVATE`	Algorithmic key type `ALG_TYPE_EC_FP_PRIVATE` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_EC_FP_PUBLIC`	Algorithmic key type `ALG_TYPE_EC_FP_PUBLIC` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_GENERIC_SECRET`	Algorithmic key type `ALG_GENERIC_SECRET` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_HMAC`	Algorithmic key type `ALG_TYPE_HMAC` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_KOREAN_SEED`	Algorithmic key type `ALG_TYPE_KOREAN_SEED` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_RSA_CRT_PRIVATE`	Algorithmic key type `ALG_TYPE_RSA_CRT_PRIVATE` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_RSA_PRIVATE`	Algorithmic key type `ALG_TYPE_RSA_PRIVATE` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_RSA_PUBLIC`	Algorithmic key type `ALG_TYPE_RSA_PUBLIC` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static byte`	`ALG_TYPE_SM4`	Algorithmic key type `ALG_SM4` choice for the `algorithmicKeyType` parameter of the `buildKey(byte, byte, short, boolean)` method.
`static short`	`ATTR_PRIVATE`	Key attribute used to create a new `XECPrivateKey` instance.
`static short`	`ATTR_PUBLIC`	Key attribute used to create a new `XECPublicKey` instance.
`static short`	`LENGTH_AES_128`	AES Key Length `LENGTH_AES_128` = 128.
`static short`	`LENGTH_AES_192`	AES Key Length `LENGTH_AES_192` = 192.
`static short`	`LENGTH_AES_256`	AES Key Length `LENGTH_AES_256` = 256.
`static short`	`LENGTH_AES_512`	AES Key Length `LENGTH_AES_512` = 512.
`static short`	`LENGTH_DES`	DES Key Length `LENGTH_DES` = 64.
`static short`	`LENGTH_DES3_2KEY`	DES Key Length `LENGTH_DES3_2KEY` for triple DES algorithm = 128.
`static short`	`LENGTH_DES3_3KEY`	DES Key Length `LENGTH_DES3_3KEY` for triple DES algorithm = 192.
`static short`	`LENGTH_DH_1024`	DH Key Length `LENGTH_DH_1024` = 1024.
`static short`	`LENGTH_DH_2048`	DH Key Length `LENGTH_DH_2048` = 2048.
`static short`	`LENGTH_DSA_1024`	DSA Key Length `LENGTH_DSA_1024` = 1024.
`static short`	`LENGTH_DSA_512`	DSA Key Length `LENGTH_DSA_512` = 512.
`static short`	`LENGTH_DSA_768`	DSA Key Length `LENGTH_DSA_768` = 768.
`static short`	`LENGTH_EC_F2M_113`	EC Key Length `LENGTH_EC_F2M_113` = 113.
`static short`	`LENGTH_EC_F2M_131`	EC Key Length `LENGTH_EC_F2M_131` = 131.
`static short`	`LENGTH_EC_F2M_163`	EC Key Length `LENGTH_EC_F2M_163` = 163.
`static short`	`LENGTH_EC_F2M_193`	EC Key Length `LENGTH_EC_F2M_193` = 193.
`static short`	`LENGTH_EC_FP_112`	EC Key Length `LENGTH_EC_FP_112` = 112.
`static short`	`LENGTH_EC_FP_128`	EC Key Length `LENGTH_EC_FP_128` = 128.
`static short`	`LENGTH_EC_FP_160`	EC Key Length `LENGTH_EC_FP_160` = 160.
`static short`	`LENGTH_EC_FP_192`	EC Key Length `LENGTH_EC_FP_192` = 192.
`static short`	`LENGTH_EC_FP_224`	EC Key Length `LENGTH_EC_FP_224` = 224.
`static short`	`LENGTH_EC_FP_256`	EC Key Length `LENGTH_EC_FP_256` = 256.
`static short`	`LENGTH_EC_FP_384`	EC Key Length `LENGTH_EC_FP_384` = 384.
`static short`	`LENGTH_EC_FP_521`	EC Key Length `LENGTH_EC_FP_521` = 521.
`static short`	`LENGTH_HMAC_SHA_1_BLOCK_64`	HMAC-SHA-1 block length `LENGTH_HMAC_SHA_1_BLOCK_64` = 64 expressed in bytes.
`static short`	`LENGTH_HMAC_SHA_256_BLOCK_64`	HMAC-SHA-256 block length `LENGTH_HMAC_SHA_256_BLOCK_64` = 64 expressed in bytes.
`static short`	`LENGTH_HMAC_SHA_384_BLOCK_128`	HMAC-SHA-384 block length `LENGTH_HMAC_SHA_384_BLOCK_128` = 128 expressed in bytes.
`static short`	`LENGTH_HMAC_SHA_512_BLOCK_128`	HMAC-SHA-512 block length `LENGTH_HMAC_SHA_512_BLOCK_128` = 128 expressed in bytes.
`static short`	`LENGTH_KOREAN_SEED_128`	Korean Seed Key Length `LENGTH_KOREAN_SEED_128` = 128.
`static short`	`LENGTH_RSA_1024`	RSA Key Length `LENGTH_RSA_1024` = 1024.
`static short`	`LENGTH_RSA_1280`	RSA Key Length `LENGTH_RSA_1280` = 1280.
`static short`	`LENGTH_RSA_1536`	RSA Key Length `LENGTH_RSA_1536` = 1536.
`static short`	`LENGTH_RSA_1984`	RSA Key Length `LENGTH_RSA_1984` = 1984.
`static short`	`LENGTH_RSA_2048`	RSA Key Length `LENGTH_RSA_2048` = 2048.
`static short`	`LENGTH_RSA_3072`	RSA Key Length `LENGTH_RSA_3072` = 3072.
`static short`	`LENGTH_RSA_4096`	RSA Key Length `LENGTH_RSA_4096` = 4096.
`static short`	`LENGTH_RSA_512`	RSA Key Length `LENGTH_RSA_512` = 512.
`static short`	`LENGTH_RSA_736`	RSA Key Length `LENGTH_RSA_736` = 736.
`static short`	`LENGTH_RSA_768`	RSA Key Length `LENGTH_RSA_768` = 768.
`static short`	`LENGTH_RSA_896`	RSA Key Length `LENGTH_RSA_896` = 896.
`static short`	`LENGTH_SM4`	SM4 Key Length `LENGTH_SM4` = 128.
`static byte`	`TYPE_AES`	`Key` object which implements interface type `AESKey` with persistent key data.
`static byte`	`TYPE_AES_TRANSIENT_DESELECT`	`Key` object which implements interface type `AESKey` with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_AES_TRANSIENT_RESET`	`Key` object which implements interface type `AESKey` with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_DES`	`Key` object which implements interface type `DESKey` with persistent key data.
`static byte`	`TYPE_DES_TRANSIENT_DESELECT`	`Key` object which implements interface type `DESKey` with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_DES_TRANSIENT_RESET`	`Key` object which implements interface type `DESKey` with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_DH_PARAMETERS`	`Key` object used to provide domain parameter in `buildKeyWithSharedDomain(byte, byte, Key, boolean)`.
`static byte`	`TYPE_DH_PRIVATE`	Key object which implements the interface type `DHPrivateKey` for DH operations.
`static byte`	`TYPE_DH_PRIVATE_TRANSIENT_DESELECT`	Key object which implements the interface type `DHPrivateKey` for DH operations, .
`static byte`	`TYPE_DH_PRIVATE_TRANSIENT_RESET`	Key object which implements the interface type `DHPrivateKey` for DH operations.
`static byte`	`TYPE_DH_PUBLIC`	Key object which implements the interface type `DHPublicKey` for DH operations.
`static byte`	`TYPE_DH_PUBLIC_TRANSIENT_DESELECT`	Key object which implements the interface type `DHPublicKey` for DH operations, .
`static byte`	`TYPE_DH_PUBLIC_TRANSIENT_RESET`	Key object which implements the interface type `DHPublicKey` for DH operations.
`static byte`	`TYPE_DSA_PARAMETERS`	`Key` object used to provide domain parameter in `buildKeyWithSharedDomain(byte, byte, Key, boolean)`.
`static byte`	`TYPE_DSA_PRIVATE`	`Key` object which implements the interface type `DSAPrivateKey` for the DSA algorithm.
`static byte`	`TYPE_DSA_PRIVATE_TRANSIENT_DESELECT`	`Key` object which implements the interface type `DSAPrivateKey` for the DSA algorithm, with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_DSA_PRIVATE_TRANSIENT_RESET`	`Key` object which implements the interface type `DSAPrivateKey` for the DSA algorithm, with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_DSA_PUBLIC`	`Key` object which implements the interface type `DSAPublicKey` for the DSA algorithm.
`static byte`	`TYPE_EC_F2M_PARAMETERS`	`Key` object used to provide domain parameter in `buildKeyWithSharedDomain(byte, byte, Key, boolean)`.
`static byte`	`TYPE_EC_F2M_PRIVATE`	Key object which implements the interface type `ECPrivateKey` for EC operations over fields of characteristic 2 with polynomial basis.
`static byte`	`TYPE_EC_F2M_PRIVATE_TRANSIENT_DESELECT`	Key object which implements the interface type `ECPrivateKey` for EC operations over fields of characteristic 2 with polynomial basis, with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_EC_F2M_PRIVATE_TRANSIENT_RESET`	Key object which implements the interface type `ECPrivateKey` for EC operations over fields of characteristic 2 with polynomial basis, with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_EC_F2M_PUBLIC`	Key object which implements the interface type `ECPublicKey` for EC operations over fields of characteristic 2 with polynomial basis.
`static byte`	`TYPE_EC_FP_PARAMETERS`	`Key` object used to provide domain parameter in `buildKeyWithSharedDomain(byte, byte, Key, boolean)`.
`static byte`	`TYPE_EC_FP_PRIVATE`	Key object which implements the interface type `ECPrivateKey` for EC operations over large prime fields.
`static byte`	`TYPE_EC_FP_PRIVATE_TRANSIENT_DESELECT`	Key object which implements the interface type `ECPrivateKey` for EC operations over large prime fields, with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_EC_FP_PRIVATE_TRANSIENT_RESET`	Key object which implements the interface type `ECPrivateKey` for EC operations over large prime fields, with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_EC_FP_PUBLIC`	Key object which implements the interface type `ECPublicKey` for EC operations over large prime fields.
`static byte`	`TYPE_GENERIC_SECRET`	`Key` object which implements interface type `GenericSecretKey`.
`static byte`	`TYPE_HMAC`	`Key` object which implements interface type `HMACKey` with persistent key data.
`static byte`	`TYPE_HMAC_TRANSIENT_DESELECT`	`Key` object which implements interface type `HMACKey` with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_HMAC_TRANSIENT_RESET`	`Key` object which implements interface type `HMACKey` with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_KOREAN_SEED`	`Key` object which implements interface type `KoreanSEEDKey` with persistent key data.
`static byte`	`TYPE_KOREAN_SEED_TRANSIENT_DESELECT`	`Key` object which implements interface type `KoreanSEEDKey` with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_KOREAN_SEED_TRANSIENT_RESET`	`Key` object which implements interface type `KoreanSEEDKey` with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_RSA_CRT_PRIVATE`	`Key` object which implements interface type `RSAPrivateCrtKey` which uses Chinese Remainder Theorem.
`static byte`	`TYPE_RSA_CRT_PRIVATE_TRANSIENT_DESELECT`	`Key` object which implements interface type `RSAPrivateCrtKey` which uses Chinese Remainder Theorem, with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_RSA_CRT_PRIVATE_TRANSIENT_RESET`	`Key` object which implements interface type `RSAPrivateCrtKey` which uses Chinese Remainder Theorem, with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_RSA_PRIVATE`	`Key` object which implements interface type `RSAPrivateKey` which uses modulus/exponent form.
`static byte`	`TYPE_RSA_PRIVATE_TRANSIENT_DESELECT`	`Key` object which implements interface type `RSAPrivateKey` which uses modulus/exponent form, with CLEAR_ON_DESELECT transient key data.
`static byte`	`TYPE_RSA_PRIVATE_TRANSIENT_RESET`	`Key` object which implements interface type `RSAPrivateKey` which uses modulus/exponent form, with CLEAR_ON_RESET transient key data.
`static byte`	`TYPE_RSA_PUBLIC`	`Key` object which implements interface type `RSAPublicKey`.
`static byte`	`TYPE_SM4`	`Key` object which implements interface type `SM4Key`.
`static byte`	`TYPE_XEC`	Extended `Key` object which implements the interface type `XECKey`.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Key`	`buildKey(byte algorithmicKeyType, byte keyMemoryType, short keyLength, boolean keyEncryption)`	Creates uninitialized cryptographic keys for signature and cipher algorithms.
`static Key`	`buildKey(byte keyType, short keyLength, boolean keyEncryption)`	Creates uninitialized cryptographic keys for signature and cipher algorithms.
`static Key`	`buildKeyWithSharedDomain(byte algorithmicKeyType, byte keyMemoryType, Key domainParameters, boolean keyEncryption)`	Creates cryptographic keys for signature and key agreement algorithms.
`static Key`	`buildXECKey(NamedParameterSpec params, short attributes, boolean keyEncryption)`	Creates uninitialized cryptographic keys for named curves with predefined elliptic curve domain parameters.
`static byte`	`getMemoryType(Key key)`	Get the memory type of the specified key.

Methods inherited from class java.lang.Object
equals

- Field Detail
  - TYPE_DES_TRANSIENT_RESET
```
public static final byte TYPE_DES_TRANSIENT_RESET
```
    Key object which implements interface type DESKey with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DES_TRANSIENT_DESELECT
```
public static final byte TYPE_DES_TRANSIENT_DESELECT
```
    Key object which implements interface type DESKey with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on, card reset and applet deselection.
    
    See Also:
    
    Constant Field Values
  - TYPE_DES
```
public static final byte TYPE_DES
```
    Key object which implements interface type DESKey with persistent key data.
    
    See Also:
    
    Constant Field Values
  - TYPE_RSA_PUBLIC
```
public static final byte TYPE_RSA_PUBLIC
```
    Key object which implements interface type RSAPublicKey.
    
    See Also:
    
    Constant Field Values
  - TYPE_RSA_PRIVATE
```
public static final byte TYPE_RSA_PRIVATE
```
    Key object which implements interface type RSAPrivateKey which uses modulus/exponent form.
    
    See Also:
    
    Constant Field Values
  - TYPE_RSA_CRT_PRIVATE
```
public static final byte TYPE_RSA_CRT_PRIVATE
```
    Key object which implements interface type RSAPrivateCrtKey which uses Chinese Remainder Theorem.
    
    See Also:
    
    Constant Field Values
  - TYPE_DSA_PUBLIC
```
public static final byte TYPE_DSA_PUBLIC
```
    Key object which implements the interface type DSAPublicKey for the DSA algorithm.
    
    See Also:
    
    Constant Field Values
  - TYPE_DSA_PRIVATE
```
public static final byte TYPE_DSA_PRIVATE
```
    Key object which implements the interface type DSAPrivateKey for the DSA algorithm.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_F2M_PUBLIC
```
public static final byte TYPE_EC_F2M_PUBLIC
```
    Key object which implements the interface type ECPublicKey for EC operations over fields of characteristic 2 with polynomial basis.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_F2M_PRIVATE
```
public static final byte TYPE_EC_F2M_PRIVATE
```
    Key object which implements the interface type ECPrivateKey for EC operations over fields of characteristic 2 with polynomial basis.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_FP_PUBLIC
```
public static final byte TYPE_EC_FP_PUBLIC
```
    Key object which implements the interface type ECPublicKey for EC operations over large prime fields.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_FP_PRIVATE
```
public static final byte TYPE_EC_FP_PRIVATE
```
    Key object which implements the interface type ECPrivateKey for EC operations over large prime fields.
    
    See Also:
    
    Constant Field Values
  - TYPE_AES_TRANSIENT_RESET
```
public static final byte TYPE_AES_TRANSIENT_RESET
```
    Key object which implements interface type AESKey with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_AES_TRANSIENT_DESELECT
```
public static final byte TYPE_AES_TRANSIENT_DESELECT
```
    Key object which implements interface type AESKey with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on, card reset and applet deselection.
    
    See Also:
    
    Constant Field Values
  - TYPE_AES
```
public static final byte TYPE_AES
```
    Key object which implements interface type AESKey with persistent key data.
    
    See Also:
    
    Constant Field Values
  - TYPE_KOREAN_SEED_TRANSIENT_RESET
```
public static final byte TYPE_KOREAN_SEED_TRANSIENT_RESET
```
    Key object which implements interface type KoreanSEEDKey with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_KOREAN_SEED_TRANSIENT_DESELECT
```
public static final byte TYPE_KOREAN_SEED_TRANSIENT_DESELECT
```
    Key object which implements interface type KoreanSEEDKey with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_KOREAN_SEED
```
public static final byte TYPE_KOREAN_SEED
```
    Key object which implements interface type KoreanSEEDKey with persistent key data.
    
    See Also:
    
    Constant Field Values
  - TYPE_HMAC_TRANSIENT_RESET
```
public static final byte TYPE_HMAC_TRANSIENT_RESET
```
    Key object which implements interface type HMACKey with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset. Note, there is no length constant associated with HMAC, since the specification states that the key can have any length.
    
    See Also:
    
    Constant Field Values
  - TYPE_HMAC_TRANSIENT_DESELECT
```
public static final byte TYPE_HMAC_TRANSIENT_DESELECT
```
    Key object which implements interface type HMACKey with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_HMAC
```
public static final byte TYPE_HMAC
```
    Key object which implements interface type HMACKey with persistent key data.
    
    See Also:
    
    Constant Field Values
  - TYPE_RSA_PRIVATE_TRANSIENT_RESET
```
public static final byte TYPE_RSA_PRIVATE_TRANSIENT_RESET
```
    Key object which implements interface type RSAPrivateKey which uses modulus/exponent form, with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_RSA_PRIVATE_TRANSIENT_DESELECT
```
public static final byte TYPE_RSA_PRIVATE_TRANSIENT_DESELECT
```
    Key object which implements interface type RSAPrivateKey which uses modulus/exponent form, with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_RSA_CRT_PRIVATE_TRANSIENT_RESET
```
public static final byte TYPE_RSA_CRT_PRIVATE_TRANSIENT_RESET
```
    Key object which implements interface type RSAPrivateCrtKey which uses Chinese Remainder Theorem, with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_RSA_CRT_PRIVATE_TRANSIENT_DESELECT
```
public static final byte TYPE_RSA_CRT_PRIVATE_TRANSIENT_DESELECT
```
    Key object which implements interface type RSAPrivateCrtKey which uses Chinese Remainder Theorem, with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DSA_PRIVATE_TRANSIENT_RESET
```
public static final byte TYPE_DSA_PRIVATE_TRANSIENT_RESET
```
    Key object which implements the interface type DSAPrivateKey for the DSA algorithm, with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DSA_PRIVATE_TRANSIENT_DESELECT
```
public static final byte TYPE_DSA_PRIVATE_TRANSIENT_DESELECT
```
    Key object which implements the interface type DSAPrivateKey for the DSA algorithm, with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_F2M_PRIVATE_TRANSIENT_RESET
```
public static final byte TYPE_EC_F2M_PRIVATE_TRANSIENT_RESET
```
    Key object which implements the interface type ECPrivateKey for EC operations over fields of characteristic 2 with polynomial basis, with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_F2M_PRIVATE_TRANSIENT_DESELECT
```
public static final byte TYPE_EC_F2M_PRIVATE_TRANSIENT_DESELECT
```
    Key object which implements the interface type ECPrivateKey for EC operations over fields of characteristic 2 with polynomial basis, with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_FP_PRIVATE_TRANSIENT_RESET
```
public static final byte TYPE_EC_FP_PRIVATE_TRANSIENT_RESET
```
    Key object which implements the interface type ECPrivateKey for EC operations over large prime fields, with CLEAR_ON_RESET transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_FP_PRIVATE_TRANSIENT_DESELECT
```
public static final byte TYPE_EC_FP_PRIVATE_TRANSIENT_DESELECT
```
    Key object which implements the interface type ECPrivateKey for EC operations over large prime fields, with CLEAR_ON_DESELECT transient key data.
    This Key object implicitly performs a clearKey() on power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DH_PUBLIC
```
public static final byte TYPE_DH_PUBLIC
```
    Key object which implements the interface type DHPublicKey for DH operations.
    
    See Also:
    
    Constant Field Values
  - TYPE_DH_PUBLIC_TRANSIENT_DESELECT
```
public static final byte TYPE_DH_PUBLIC_TRANSIENT_DESELECT
```
    Key object which implements the interface type DHPublicKey for DH operations, . This Key object implicitly performs a clearKey() on applet deselection, card power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DH_PUBLIC_TRANSIENT_RESET
```
public static final byte TYPE_DH_PUBLIC_TRANSIENT_RESET
```
    Key object which implements the interface type DHPublicKey for DH operations. This Key object implicitly performs a clearKey() on card power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DH_PRIVATE
```
public static final byte TYPE_DH_PRIVATE
```
    Key object which implements the interface type DHPrivateKey for DH operations.
    
    See Also:
    
    Constant Field Values
  - TYPE_DH_PRIVATE_TRANSIENT_DESELECT
```
public static final byte TYPE_DH_PRIVATE_TRANSIENT_DESELECT
```
    Key object which implements the interface type DHPrivateKey for DH operations, . This Key object implicitly performs a clearKey() on applet deselection, card power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DH_PRIVATE_TRANSIENT_RESET
```
public static final byte TYPE_DH_PRIVATE_TRANSIENT_RESET
```
    Key object which implements the interface type DHPrivateKey for DH operations. This Key object implicitly performs a clearKey() on card power on or card reset.
    
    See Also:
    
    Constant Field Values
  - TYPE_DH_PARAMETERS
```
public static final byte TYPE_DH_PARAMETERS
```
    Key object used to provide domain parameter in buildKeyWithSharedDomain(byte, byte, Key, boolean). as Such instances implement the interface types DHKey and Key
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - TYPE_DSA_PARAMETERS
```
public static final byte TYPE_DSA_PARAMETERS
```
    Key object used to provide domain parameter in buildKeyWithSharedDomain(byte, byte, Key, boolean). as Such instances implement the interface types DSAKey and Key
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_F2M_PARAMETERS
```
public static final byte TYPE_EC_F2M_PARAMETERS
```
    Key object used to provide domain parameter in buildKeyWithSharedDomain(byte, byte, Key, boolean). as Such instances implement the interface types ECKey and Key
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - TYPE_EC_FP_PARAMETERS
```
public static final byte TYPE_EC_FP_PARAMETERS
```
    Key object used to provide domain parameter in buildKeyWithSharedDomain(byte, byte, Key, boolean). as Such instances implement the interface types ECKey and Key
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - TYPE_GENERIC_SECRET
```
public static final byte TYPE_GENERIC_SECRET
```
    Key object which implements interface type GenericSecretKey.
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - TYPE_SM4
```
public static final byte TYPE_SM4
```
    Key object which implements interface type SM4Key.
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - TYPE_XEC
```
public static final byte TYPE_XEC
```
    Extended Key object which implements the interface type XECKey.
    This constant is returned when calling Key.getType() on an extended key created using buildXECKey() method. It cannot be used to instantiate a new key using buildKey().
    
    Since:
    
    3.1
    
    See Also:
    
    buildXECKey(NamedParameterSpec, short, boolean), Constant Field Values
  - ALG_TYPE_DES
```
public static final byte ALG_TYPE_DES
```
    Algorithmic key type ALG_TYPE_DES choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type DESKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_AES
```
public static final byte ALG_TYPE_AES
```
    Algorithmic key type ALG_TYPE_AES choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type AESKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_DSA_PUBLIC
```
public static final byte ALG_TYPE_DSA_PUBLIC
```
    Algorithmic key type ALG_TYPE_DSA_PUBLIC choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type DSAPublicKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_DSA_PRIVATE
```
public static final byte ALG_TYPE_DSA_PRIVATE
```
    Algorithmic key type ALG_TYPE_DSA_PRIVATE choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type DSAPrivateKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_EC_F2M_PUBLIC
```
public static final byte ALG_TYPE_EC_F2M_PUBLIC
```
    Algorithmic key type ALG_TYPE_EC_F2M_PUBLIC choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type ECPublicKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_EC_F2M_PRIVATE
```
public static final byte ALG_TYPE_EC_F2M_PRIVATE
```
    Algorithmic key type ALG_TYPE_EC_F2M_PRIVATE choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type ECPrivateKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_EC_FP_PUBLIC
```
public static final byte ALG_TYPE_EC_FP_PUBLIC
```
    Algorithmic key type ALG_TYPE_EC_FP_PUBLIC choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type ECPublicKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_EC_FP_PRIVATE
```
public static final byte ALG_TYPE_EC_FP_PRIVATE
```
    Algorithmic key type ALG_TYPE_EC_FP_PRIVATE choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type ECPrivateKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_HMAC
```
public static final byte ALG_TYPE_HMAC
```
    Algorithmic key type ALG_TYPE_HMAC choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type HMACKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_KOREAN_SEED
```
public static final byte ALG_TYPE_KOREAN_SEED
```
    Algorithmic key type ALG_TYPE_KOREAN_SEED choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type KoreanSEEDKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_RSA_PUBLIC
```
public static final byte ALG_TYPE_RSA_PUBLIC
```
    Algorithmic key type ALG_TYPE_RSA_PUBLIC choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type RSAPublicKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_RSA_PRIVATE
```
public static final byte ALG_TYPE_RSA_PRIVATE
```
    Algorithmic key type ALG_TYPE_RSA_PRIVATE choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type RSAPrivateKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_RSA_CRT_PRIVATE
```
public static final byte ALG_TYPE_RSA_CRT_PRIVATE
```
    Algorithmic key type ALG_TYPE_RSA_CRT_PRIVATE choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type RSAPrivateCrtKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_DH_PUBLIC
```
public static final byte ALG_TYPE_DH_PUBLIC
```
    Algorithmic key type ALG_TYPE_DH_PUBLIC choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type DSAPublicKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_DH_PRIVATE
```
public static final byte ALG_TYPE_DH_PRIVATE
```
    Algorithmic key type ALG_TYPE_DH_PRIVATE choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type DSAPrivateKey.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_EC_F2M_PARAMETERS
```
public static final byte ALG_TYPE_EC_F2M_PARAMETERS
```
    Algorithmic key type ALG_TYPE_EC_F2M_PARAMETERS choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface types ECKey and Key.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_EC_FP_PARAMETERS
```
public static final byte ALG_TYPE_EC_FP_PARAMETERS
```
    Algorithmic key type ALG_TYPE_EC_FP_PARAMETERS choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface types ECKey and Key.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_DSA_PARAMETERS
```
public static final byte ALG_TYPE_DSA_PARAMETERS
```
    Algorithmic key type ALG_TYPE_DSA_PARAMETERS choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface types DSAKey and Key.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_DH_PARAMETERS
```
public static final byte ALG_TYPE_DH_PARAMETERS
```
    Algorithmic key type ALG_TYPE_DH_PARAMETERS choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface types DHKey and Key.
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_GENERIC_SECRET
```
public static final byte ALG_TYPE_GENERIC_SECRET
```
    Algorithmic key type ALG_GENERIC_SECRET choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type GenericSecretKey.
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - ALG_TYPE_SM4
```
public static final byte ALG_TYPE_SM4
```
    Algorithmic key type ALG_SM4 choice for the algorithmicKeyType parameter of the buildKey(byte, byte, short, boolean) method. The key instance created implements the interface type SM4Key.
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - LENGTH_DES
```
public static final short LENGTH_DES
```
    DES Key Length LENGTH_DES = 64.
    
    See Also:
    
    Constant Field Values
  - LENGTH_DES3_2KEY
```
public static final short LENGTH_DES3_2KEY
```
    DES Key Length LENGTH_DES3_2KEY for triple DES algorithm = 128.
    
    See Also:
    
    Constant Field Values
  - LENGTH_DES3_3KEY
```
public static final short LENGTH_DES3_3KEY
```
    DES Key Length LENGTH_DES3_3KEY for triple DES algorithm = 192.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_512
```
public static final short LENGTH_RSA_512
```
    RSA Key Length LENGTH_RSA_512 = 512.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_736
```
public static final short LENGTH_RSA_736
```
    RSA Key Length LENGTH_RSA_736 = 736.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_768
```
public static final short LENGTH_RSA_768
```
    RSA Key Length LENGTH_RSA_768 = 768.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_896
```
public static final short LENGTH_RSA_896
```
    RSA Key Length LENGTH_RSA_896 = 896.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_1024
```
public static final short LENGTH_RSA_1024
```
    RSA Key Length LENGTH_RSA_1024 = 1024.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_1280
```
public static final short LENGTH_RSA_1280
```
    RSA Key Length LENGTH_RSA_1280 = 1280.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_1536
```
public static final short LENGTH_RSA_1536
```
    RSA Key Length LENGTH_RSA_1536 = 1536.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_1984
```
public static final short LENGTH_RSA_1984
```
    RSA Key Length LENGTH_RSA_1984 = 1984.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_2048
```
public static final short LENGTH_RSA_2048
```
    RSA Key Length LENGTH_RSA_2048 = 2048.
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_3072
```
public static final short LENGTH_RSA_3072
```
    RSA Key Length LENGTH_RSA_3072 = 3072.
    
    Since:
    
    3.0.5
    
    See Also:
    
    Constant Field Values
  - LENGTH_RSA_4096
```
public static final short LENGTH_RSA_4096
```
    RSA Key Length LENGTH_RSA_4096 = 4096.
    
    See Also:
    
    Constant Field Values
  - LENGTH_DSA_512
```
public static final short LENGTH_DSA_512
```
    DSA Key Length LENGTH_DSA_512 = 512.
    
    See Also:
    
    Constant Field Values
  - LENGTH_DSA_768
```
public static final short LENGTH_DSA_768
```
    DSA Key Length LENGTH_DSA_768 = 768.
    
    See Also:
    
    Constant Field Values
  - LENGTH_DSA_1024
```
public static final short LENGTH_DSA_1024
```
    DSA Key Length LENGTH_DSA_1024 = 1024.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_112
```
public static final short LENGTH_EC_FP_112
```
    EC Key Length LENGTH_EC_FP_112 = 112.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_F2M_113
```
public static final short LENGTH_EC_F2M_113
```
    EC Key Length LENGTH_EC_F2M_113 = 113.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_128
```
public static final short LENGTH_EC_FP_128
```
    EC Key Length LENGTH_EC_FP_128 = 128.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_F2M_131
```
public static final short LENGTH_EC_F2M_131
```
    EC Key Length LENGTH_EC_F2M_131 = 131.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_160
```
public static final short LENGTH_EC_FP_160
```
    EC Key Length LENGTH_EC_FP_160 = 160.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_F2M_163
```
public static final short LENGTH_EC_F2M_163
```
    EC Key Length LENGTH_EC_F2M_163 = 163.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_192
```
public static final short LENGTH_EC_FP_192
```
    EC Key Length LENGTH_EC_FP_192 = 192.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_F2M_193
```
public static final short LENGTH_EC_F2M_193
```
    EC Key Length LENGTH_EC_F2M_193 = 193.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_224
```
public static final short LENGTH_EC_FP_224
```
    EC Key Length LENGTH_EC_FP_224 = 224.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_256
```
public static final short LENGTH_EC_FP_256
```
    EC Key Length LENGTH_EC_FP_256 = 256.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_384
```
public static final short LENGTH_EC_FP_384
```
    EC Key Length LENGTH_EC_FP_384 = 384.
    
    See Also:
    
    Constant Field Values
  - LENGTH_EC_FP_521
```
public static final short LENGTH_EC_FP_521
```
    EC Key Length LENGTH_EC_FP_521 = 521.
    
    See Also:
    
    Constant Field Values
  - LENGTH_AES_128
```
public static final short LENGTH_AES_128
```
    AES Key Length LENGTH_AES_128 = 128.
    
    See Also:
    
    Constant Field Values
  - LENGTH_AES_192
```
public static final short LENGTH_AES_192
```
    AES Key Length LENGTH_AES_192 = 192.
    
    See Also:
    
    Constant Field Values
  - LENGTH_AES_256
```
public static final short LENGTH_AES_256
```
    AES Key Length LENGTH_AES_256 = 256.
    
    See Also:
    
    Constant Field Values
  - LENGTH_AES_512
```
public static final short LENGTH_AES_512
```
    AES Key Length LENGTH_AES_512 = 512. This key length must be used to create keys made of two AES-256 sub-keys as required for some algorithms
    
    Since:
    
    3.1
    
    See Also:
    
    Cipher.CIPHER_AES_XTS, Constant Field Values
  - LENGTH_KOREAN_SEED_128
```
public static final short LENGTH_KOREAN_SEED_128
```
    Korean Seed Key Length LENGTH_KOREAN_SEED_128 = 128.
    
    See Also:
    
    Constant Field Values
  - LENGTH_HMAC_SHA_1_BLOCK_64
```
public static final short LENGTH_HMAC_SHA_1_BLOCK_64
```
    HMAC-SHA-1 block length LENGTH_HMAC_SHA_1_BLOCK_64 = 64 expressed in bytes.
    Note: This constant should not be used to create an HMAC key which can be of any length and must be expressed in bits within buildKey(byte, short, boolean) or buildKey(byte, byte, short, boolean) methods.
    
    See Also:
    
    Constant Field Values
  - LENGTH_HMAC_SHA_256_BLOCK_64
```
public static final short LENGTH_HMAC_SHA_256_BLOCK_64
```
    HMAC-SHA-256 block length LENGTH_HMAC_SHA_256_BLOCK_64 = 64 expressed in bytes.
    Note: This constant should not be used to create an HMAC key which can be of any length and must be expressed in bits within buildKey(byte, short, boolean) or buildKey(byte, byte, short, boolean) methods.
    
    See Also:
    
    Constant Field Values
  - LENGTH_HMAC_SHA_384_BLOCK_128
```
public static final short LENGTH_HMAC_SHA_384_BLOCK_128
```
    HMAC-SHA-384 block length LENGTH_HMAC_SHA_384_BLOCK_128 = 128 expressed in bytes.
    Note: This constant should not be used to create an HMAC key which can be of any length and must be expressed in bits within buildKey(byte, short, boolean) or buildKey(byte, byte, short, boolean) methods.
    
    See Also:
    
    Constant Field Values
  - LENGTH_HMAC_SHA_512_BLOCK_128
```
public static final short LENGTH_HMAC_SHA_512_BLOCK_128
```
    HMAC-SHA-512 block length LENGTH_HMAC_SHA_512_BLOCK_128 = 128 expressed in bytes.
    Note: This constant should not be used to create an HMAC key which can be of any length and must be expressed in bits within buildKey(byte, short, boolean) or buildKey(byte, byte, short, boolean) methods.
    
    See Also:
    
    Constant Field Values
  - LENGTH_DH_1024
```
public static final short LENGTH_DH_1024
```
    DH Key Length LENGTH_DH_1024 = 1024.
    
    See Also:
    
    Constant Field Values
  - LENGTH_DH_2048
```
public static final short LENGTH_DH_2048
```
    DH Key Length LENGTH_DH_2048 = 2048.
    
    See Also:
    
    Constant Field Values
  - LENGTH_SM4
```
public static final short LENGTH_SM4
```
    SM4 Key Length LENGTH_SM4 = 128.
    
    Since:
    
    3.1
    
    See Also:
    
    Constant Field Values
  - ATTR_PUBLIC
```
public static final short ATTR_PUBLIC
```
    Key attribute used to create a new XECPublicKey instance.
    
    See Also:
    
    buildXECKey(NamedParameterSpec, short, boolean), Constant Field Values
  - ATTR_PRIVATE
```
public static final short ATTR_PRIVATE
```
    Key attribute used to create a new XECPrivateKey instance.
    
    See Also:
    
    buildXECKey(NamedParameterSpec, short, boolean), Constant Field Values
- Method Detail
  - buildKey
```
public static Key buildKey(byte keyType,
                           short keyLength,
                           boolean keyEncryption)
                    throws CryptoException
```
    Creates uninitialized cryptographic keys for signature and cipher algorithms. Only instances created by this method may be the key objects used to initialize instances of Signature, Cipher and KeyPair. Note that the object returned must be cast to their appropriate key type interface.
    Parameters:
    
    keyType - the type of key to be generated. Valid codes listed in TYPE_* constants, for example TYPE_DES_TRANSIENT_RESET.
    
    keyLength - the key size in bits. The valid key bit lengths are key type dependent. Some common key lengths are listed above above in the LENGTH_* constants, for example LENGTH_DES.
    
    keyEncryption - if true this boolean requests a key implementation which implements the javacardx.crypto.KeyEncryption interface. The key implementation returned may implement the javacardx.crypto.KeyEncryption interface even when this parameter is false.
    
    Returns:
    
    the key object instance of the requested key type, length and encrypted access
    
    Throws:
    
    CryptoException - with the following reason codes:
    
    CryptoException.NO_SUCH_ALGORITHM if the requested algorithm associated with the specified type, size of key and key encryption interface is not supported.
    
    See Also:
    
    buildKey(byte, byte, short, boolean)
  - buildXECKey
```
public static Key buildXECKey(NamedParameterSpec params,
                              short attributes,
                              boolean keyEncryption)
                       throws CryptoException
```
    Creates uninitialized cryptographic keys for named curves with predefined elliptic curve domain parameters. Instances created are either implementing the XECPublicKey interface or the XECPrivateKey interface and can be used to initialize instances of Signature, Cipher, KeyPair or KeyAgreement.
    Example:
    NamedParameterSpec x25519 = NamedParameterSpec.getInstance(X25519); XECPrivateKey k = KeyBuilder.buildXECKey(x25519, (short)(MEMORY_TYPE_PERSISTENT|ATTR_PRIVATE), false);
    Parameters:
    
    params - named parameters defining the curve domain parameters
    
    attributes - the key attributes. Use bitwise OR to select relevant attributes
    
    type of memory for key data storage: use JCSystem.MEMORY_TYPE_* constants, for example MEMORY_TYPE_PERSISTENT.
    Asymmetric key type: ATTR_PUBLIC or ATTR_PRIVATE. The created key will respectively implements XECPublicKey interface or XECPrivateKey interface
    
    keyEncryption - if true this boolean requests a key implementation which implements the javacardx.crypto.KeyEncryption interface. The key implementation returned may implement the javacardx.crypto.KeyEncryption interface even when this parameter is false.
    
    Returns:
    
    the key object instance of the requested algorithmic key type, key memory storage type, key length and encrypted access required
    
    Throws:
    
    CryptoException - with the following reason codes:
    
    CryptoException.NO_SUCH_ALGORITHM if the requested algorithm associated with the specified algorithmic type, or memory storage type for key, or size of key or key encryption interface requested is not supported.
    
    Since:
    
    3.1
    
    See Also:
    
    buildKey(byte, short, boolean)
  - buildKey
```
public static Key buildKey(byte algorithmicKeyType,
                           byte keyMemoryType,
                           short keyLength,
                           boolean keyEncryption)
                    throws CryptoException
```
    Creates uninitialized cryptographic keys for signature and cipher algorithms. Only instances created by this method may be the key objects used to initialize instances of Signature, Cipher and KeyPair. Note that the object returned must be cast to their appropriate key type interface.
    Parameters:
    
    algorithmicKeyType - the type of key and algorithm to be generated. Valid codes listed in ALG_TYPE_* constants, for example ALG_TYPE_DES.
    
    keyMemoryType - the type of memory for key data storage. Valid codes listed in JCSystem.MEMORY_TYPE_* constants, for example MEMORY_TYPE_PERSISTENT.
    
    keyLength - the key size in bits. The valid key bit lengths are key type dependent. Some common key lengths are listed above above in the LENGTH_* constants, for example LENGTH_DES.
    
    keyEncryption - if true this boolean requests a key implementation which implements the javacardx.crypto.KeyEncryption interface. The key implementation returned may implement the javacardx.crypto.KeyEncryption interface even when this parameter is false.
    
    Returns:
    
    the key object instance of the requested algorithmic key type, key memory storage type, key length and encrypted access required
    
    Throws:
    
    CryptoException - with the following reason codes:
    
    CryptoException.NO_SUCH_ALGORITHM if the requested algorithm associated with the specified algorithmic type, or memory storage type for key, or size of key or key encryption interface requested is not supported.
    
    Since:
    
    3.0.4
    
    See Also:
    
    buildKey(byte, short, boolean)
  - getMemoryType
```
public static byte getMemoryType(Key key)
```
    Get the memory type of the specified key. It corresponds to the memory type specified when building the key with buildKey(byte, byte, short, boolean) and used to store key material
    
    Parameters:
    
    key - the key instance to query
    
    Returns:
    
    the memory type of the key
    
    Since:
    
    3.1
    
    See Also:
    
    JCSystem.MEMORY_TYPE_PERSISTENT, JCSystem.MEMORY_TYPE_TRANSIENT_RESET, JCSystem.MEMORY_TYPE_TRANSIENT_DESELECT
  - buildKeyWithSharedDomain
```
public static Key buildKeyWithSharedDomain(byte algorithmicKeyType,
                                           byte keyMemoryType,
                                           Key domainParameters,
                                           boolean keyEncryption)
                                    throws CryptoException
```
    Creates cryptographic keys for signature and key agreement algorithms. Only instances created by this method may be the key objects used to initialize instances of Signature, KeyAgreement and KeyPair. Note that the object returned must be cast to their appropriate key type interface.
    The domain parameters object in the domainParameters argument is shared with other keys created using the same parameter argument. This means that any changes to the shared parameters - by calling one of the setter methods - will be reflected within the other keys sharing these parameters.
    The domainParameters argument must be a special parameters object. Parameter objects can be created created using key algorithm types which are suffixed with _PARAMETERS using the buildKey(byte, byte, short, boolean) method. The key value, such as the secret S or the public point W for an EC Key, or X or Y for DH and DSA Key will never be shared. The key size is determined by information contained in the domainParameters argument.
    Parameters:
    
    algorithmicKeyType - the type of key and algorithm to be generated. Valid codes listed in ALG_TYPE_* constants, for example ALG_TYPE_EC_F2M_PUBLIC.
    
    keyMemoryType - the type of memory for key data storage. Valid codes listed in JCSystem.MEMORY_TYPE_* constants, for example MEMORY_TYPE_PERSISTENT.
    
    domainParameters - a special parameters object containing domain parameters. Parameter objects can be created created using key types which are suffixed with _PARAMETERS
    
    keyEncryption - if true this boolean requests a key implementation which implements the javacardx.crypto.KeyEncryption interface. The key implementation returned may implement the javacardx.crypto.KeyEncryption interface even when this parameter is false.
    
    Returns:
    
    the key object instance of the requested key type, length and encrypted access
    
    Throws:
    
    CryptoException - with the following reason codes:
    
    CryptoException.NO_SUCH_ALGORITHM if the requested algorithm associated with the specified type, size of key and key encryption interface is not supported.

Class KeyBuilder

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

TYPE_DES_TRANSIENT_RESET

TYPE_DES_TRANSIENT_DESELECT

TYPE_DES

TYPE_RSA_PUBLIC

TYPE_RSA_PRIVATE

TYPE_RSA_CRT_PRIVATE

TYPE_DSA_PUBLIC

TYPE_DSA_PRIVATE

TYPE_EC_F2M_PUBLIC

TYPE_EC_F2M_PRIVATE

TYPE_EC_FP_PUBLIC

TYPE_EC_FP_PRIVATE

TYPE_AES_TRANSIENT_RESET

TYPE_AES_TRANSIENT_DESELECT

TYPE_AES

TYPE_KOREAN_SEED_TRANSIENT_RESET

TYPE_KOREAN_SEED_TRANSIENT_DESELECT

TYPE_KOREAN_SEED

TYPE_HMAC_TRANSIENT_RESET

TYPE_HMAC_TRANSIENT_DESELECT

TYPE_HMAC

TYPE_RSA_PRIVATE_TRANSIENT_RESET

TYPE_RSA_PRIVATE_TRANSIENT_DESELECT

TYPE_RSA_CRT_PRIVATE_TRANSIENT_RESET

TYPE_RSA_CRT_PRIVATE_TRANSIENT_DESELECT

TYPE_DSA_PRIVATE_TRANSIENT_RESET

TYPE_DSA_PRIVATE_TRANSIENT_DESELECT

TYPE_EC_F2M_PRIVATE_TRANSIENT_RESET

TYPE_EC_F2M_PRIVATE_TRANSIENT_DESELECT

TYPE_EC_FP_PRIVATE_TRANSIENT_RESET

TYPE_EC_FP_PRIVATE_TRANSIENT_DESELECT

TYPE_DH_PUBLIC

TYPE_DH_PUBLIC_TRANSIENT_DESELECT

TYPE_DH_PUBLIC_TRANSIENT_RESET

TYPE_DH_PRIVATE

TYPE_DH_PRIVATE_TRANSIENT_DESELECT

TYPE_DH_PRIVATE_TRANSIENT_RESET

TYPE_DH_PARAMETERS

TYPE_DSA_PARAMETERS

TYPE_EC_F2M_PARAMETERS

TYPE_EC_FP_PARAMETERS

TYPE_GENERIC_SECRET

TYPE_SM4

TYPE_XEC

ALG_TYPE_DES

ALG_TYPE_AES

ALG_TYPE_DSA_PUBLIC

ALG_TYPE_DSA_PRIVATE

ALG_TYPE_EC_F2M_PUBLIC

ALG_TYPE_EC_F2M_PRIVATE

ALG_TYPE_EC_FP_PUBLIC

ALG_TYPE_EC_FP_PRIVATE

ALG_TYPE_HMAC

ALG_TYPE_KOREAN_SEED

ALG_TYPE_RSA_PUBLIC

ALG_TYPE_RSA_PRIVATE

ALG_TYPE_RSA_CRT_PRIVATE

ALG_TYPE_DH_PUBLIC

ALG_TYPE_DH_PRIVATE

ALG_TYPE_EC_F2M_PARAMETERS

ALG_TYPE_EC_FP_PARAMETERS

ALG_TYPE_DSA_PARAMETERS

ALG_TYPE_DH_PARAMETERS

ALG_TYPE_GENERIC_SECRET

ALG_TYPE_SM4

LENGTH_DES

LENGTH_DES3_2KEY

LENGTH_DES3_3KEY

LENGTH_RSA_512

LENGTH_RSA_736

LENGTH_RSA_768

LENGTH_RSA_896

LENGTH_RSA_1024

LENGTH_RSA_1280

LENGTH_RSA_1536