Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Fields](https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#lfields) \| [Ctors](https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#pubctors) \| [Methods](https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#inhmethods)

# OAEPParameterSpec


`
public


class
OAEPParameterSpec
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


implements

https://developer.android.com/reference/java/security/spec/AlgorithmParameterSpec


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | javax.crypto.spec.OAEPParameterSpec |

<br />

*** ** * ** ***

This class specifies the set of parameters used with OAEP Padding,
as defined in the
[PKCS #1](http://www.ietf.org/rfc/rfc3447.txt)
standard.

Its ASN.1 definition in PKCS#1 standard is described below:

```
RSAES-OAEP-params ::= SEQUENCE {
  hashAlgorithm      [0] OAEP-PSSDigestAlgorithms     DEFAULT sha1,
  maskGenAlgorithm   [1] PKCS1MGFAlgorithms  DEFAULT mgf1SHA1,
  pSourceAlgorithm   [2] PKCS1PSourceAlgorithms  DEFAULT pSpecifiedEmpty
}
```
where

```
OAEP-PSSDigestAlgorithms    ALGORITHM-IDENTIFIER ::= {
  { OID id-sha1 PARAMETERS NULL   }|
  { OID id-sha256 PARAMETERS NULL }|
  { OID id-sha384 PARAMETERS NULL }|
  { OID id-sha512 PARAMETERS NULL },
  ...  -- Allows for future expansion --
}
PKCS1MGFAlgorithms    ALGORITHM-IDENTIFIER ::= {
  { OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms },
  ...  -- Allows for future expansion --
}
PKCS1PSourceAlgorithms    ALGORITHM-IDENTIFIER ::= {
  { OID id-pSpecified PARAMETERS OCTET STRING },
  ...  -- Allows for future expansion --
}
```

Note: the OAEPParameterSpec.DEFAULT uses the following:
message digest -- "SHA-1"
mask generation function (mgf) -- "MGF1"
parameters for mgf -- MGF1ParameterSpec.SHA1
source of encoding input -- PSource.PSpecified.DEFAULT
**See also:**

- `https://developer.android.com/reference/java/security/spec/MGF1ParameterSpec`
- `https://developer.android.com/reference/javax/crypto/spec/PSource`

## Summary

| ### Fields ||
|---|---|
| ` public static final https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec` | `https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#DEFAULT` The OAEP parameter set with all default values. |

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#OAEPParameterSpec(java.lang.String,%20java.lang.String,%20java.security.spec.AlgorithmParameterSpec,%20javax.crypto.spec.PSource)(https://developer.android.com/reference/java/lang/String mdName, https://developer.android.com/reference/java/lang/String mgfName, https://developer.android.com/reference/java/security/spec/AlgorithmParameterSpec mgfSpec, https://developer.android.com/reference/javax/crypto/spec/PSource pSrc) ` Constructs a parameter set for OAEP padding as defined in the PKCS #1 standard using the specified message digest algorithm `mdName`, mask generation function algorithm `mgfName`, parameters for the mask generation function `mgfSpec`, and source of the encoding input P `pSrc`. |

| ### Public methods ||
|---|---|
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#getDigestAlgorithm()() ` Returns the message digest algorithm name. |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#getMGFAlgorithm()() ` Returns the mask generation function algorithm name. |
| ` https://developer.android.com/reference/java/security/spec/AlgorithmParameterSpec` | ` https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#getMGFParameters()() ` Returns the parameters for the mask generation function. |
| ` https://developer.android.com/reference/javax/crypto/spec/PSource` | ` https://developer.android.com/reference/javax/crypto/spec/OAEPParameterSpec#getPSource()() ` Returns the source of encoding input P. |

| ### 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*. | ||

## Fields

### DEFAULT

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final OAEPParameterSpec DEFAULT
```

The OAEP parameter set with all default values.

<br />

## Public constructors

### OAEPParameterSpec

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public OAEPParameterSpec (String mdName, 
                String mgfName, 
                AlgorithmParameterSpec mgfSpec, 
                PSource pSrc)
```

Constructs a parameter set for OAEP padding as defined in
the PKCS #1 standard using the specified message digest
algorithm `mdName`, mask generation function
algorithm `mgfName`, parameters for the mask
generation function `mgfSpec`, and source of
the encoding input P `pSrc`.

<br />

| Parameters ||
|---|---|
| `mdName` | `String`: the algorithm name for the message digest. <br /> |
| `mgfName` | `String`: the algorithm name for the mask generation function. <br /> |
| `mgfSpec` | `AlgorithmParameterSpec`: the parameters for the mask generation function. If null is specified, null will be returned by getMGFParameters(). <br /> |
| `pSrc` | `PSource`: the source of the encoding input P. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/NullPointerException` | if `mdName`, `mgfName`, or `pSrc` is null. |

## Public methods

### getDigestAlgorithm

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String getDigestAlgorithm ()
```

Returns the message digest algorithm name.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | the message digest algorithm name. <br /> |

### getMGFAlgorithm

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String getMGFAlgorithm ()
```

Returns the mask generation function algorithm name.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | the mask generation function algorithm name. <br /> |

### getMGFParameters

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public AlgorithmParameterSpec getMGFParameters ()
```

Returns the parameters for the mask generation function.

<br />

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

### getPSource

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public PSource getPSource ()
```

Returns the source of encoding input P.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/javax/crypto/spec/PSource` | the source of encoding input P. <br /> |