Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Ctors](https://developer.android.com/reference/java/security/spec/XECPrivateKeySpec#pubctors) \| [Methods](https://developer.android.com/reference/java/security/spec/XECPrivateKeySpec#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/security/spec/XECPrivateKeySpec#inhmethods)

# XECPrivateKeySpec

` public class XECPrivateKeySpec `   
` extends https://developer.android.com/reference/java/lang/Object ` ` implements https://developer.android.com/reference/java/security/spec/KeySpec `

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | java.security.spec.XECPrivateKeySpec |

<br />

*** ** * ** ***

A class representing elliptic curve private keys as defined in RFC 7748, including the curve and other algorithm parameters. The private key is represented as an encoded scalar value. The decoding procedure defined in the RFC includes an operation that forces certain bits of the key to either 1 or 0. This operation is known as "pruning" or "clamping" the private key. All arrays in this spec are unpruned, and implementations will need to prune the array before using it in any numerical operations.

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/java/security/spec/XECPrivateKeySpec#XECPrivateKeySpec(java.security.spec.AlgorithmParameterSpec,%20byte[])(https://developer.android.com/reference/java/security/spec/AlgorithmParameterSpec params, byte[] scalar) ` Construct a private key spec using the supplied parameters and encoded scalar value. |

| ### Public methods ||
|---|---|
| ` https://developer.android.com/reference/java/security/spec/AlgorithmParameterSpec` | ` https://developer.android.com/reference/java/security/spec/XECPrivateKeySpec#getParams()() ` Get the algorithm parameters that define the curve and other settings. |
| ` byte[]` | ` https://developer.android.com/reference/java/security/spec/XECPrivateKeySpec#getScalar()() ` Get the scalar value encoded as an unpruned byte array. |

### Inherited methods

From class ` https://developer.android.com/reference/java/lang/Object ` ` https://developer.android.com/reference/java/lang/Object` ` https://developer.android.com/reference/java/lang/Object#clone()() `

Creates and returns a copy of this object.
` boolean` ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) `

Indicates whether some other object is "equal to" this one.
` void` ` https://developer.android.com/reference/java/lang/Object#finalize()() `

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
` final https://developer.android.com/reference/java/lang/Class<?>` ` https://developer.android.com/reference/java/lang/Object#getClass()() `

Returns the runtime class of this `Object`.
` int` ` https://developer.android.com/reference/java/lang/Object#hashCode()() `

Returns a hash code value for the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#notify()() `

Wakes up a single thread that is waiting on this object's monitor.
` final void` ` https://developer.android.com/reference/java/lang/Object#notifyAll()() `

Wakes up all threads that are waiting on this object's monitor.
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/java/lang/Object#toString()() `

Returns a string representation of the object.
` final void` ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(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` ` https://developer.android.com/reference/java/lang/Object#wait(long)(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` ` https://developer.android.com/reference/java/lang/Object#wait()() `

Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*.

## Public constructors

### XECPrivateKeySpec

Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public XECPrivateKeySpec (AlgorithmParameterSpec params, 
                byte[] scalar)
```

Construct a private key spec using the supplied parameters and encoded scalar value.

<br />

| Parameters ||
|---|---|
| `params` | `AlgorithmParameterSpec`: the algorithm parameters <br /> |
| `scalar` | `byte`: the unpruned encoded scalar value. This array is copied to protect against subsequent modification. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `params` or `scalar` is null. |

## Public methods

### getParams

Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public AlgorithmParameterSpec getParams ()
```

Get the algorithm parameters that define the curve and other settings.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/security/spec/AlgorithmParameterSpec` | the algorithm parameters <br /> |

### getScalar

Added in [API level 33](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public byte[] getScalar ()
```

Get the scalar value encoded as an unpruned byte array. A new copy of the array is returned each time this method is called.

<br />

| Returns ||
|---|---|
| `byte[]` | the unpruned encoded scalar value <br /> |