# CertificateFactory

public class **CertificateFactory** extends [Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html)  
This class defines the functionality of a certificate factory, which is
used to generate certificate, certification path (`CertPath`)
and certificate revocation list (CRL) objects from their encodings.

For encodings consisting of multiple certificates, use
`generateCertificates` when you want to
parse a collection of possibly unrelated certificates. Otherwise,
use `generateCertPath` when you want to generate
a `CertPath` (a certificate chain) and subsequently
validate it with a `CertPathValidator`.

A certificate factory for X.509 must return certificates that are an
instance of `java.security.cert.X509Certificate`, and CRLs
that are an instance of `java.security.cert.X509CRL`.

The following example reads a file with Base64 encoded certificates,
which are each bounded at the beginning by ---BEGIN CERTIFICATE---, and
bounded at the end by ---END CERTIFICATE---. We convert the
`FileInputStream` (which does not support `mark`
and `reset`) to a `BufferedInputStream` (which
supports those methods), so that each call to
`generateCertificate` consumes only one certificate, and the
read position of the input stream is positioned to the next certificate in
the file:

    FileInputStream fis = new FileInputStream(filename);
     BufferedInputStream bis = new BufferedInputStream(fis);

     CertificateFactory cf = CertificateFactory.getInstance("X.509");

     while (bis.available() > 0) {
        Certificate cert = cf.generateCertificate(bis);
        System.out.println(cert.toString());
     }
     
The following example parses a PKCS#7-formatted certificate reply stored
in a file and extracts all the certificates from it:

```
 FileInputStream fis = new FileInputStream(filename);
 CertificateFactory cf = CertificateFactory.getInstance("X.509");
 Collection c = cf.generateCertificates(fis);
 Iterator i = c.iterator();
 while (i.hasNext()) {
    Certificate cert = (Certificate)i.next();
    System.out.println(cert);
 }
 
```

Android provides the following `CertificateFactory` types:

| Algorithm | Supported API Levels |
|---|---|
| X.509 | 1+ |

and the following `CertPath` encodings:

| Name | Supported (API Levels) |
|---|---|
| PKCS7 | 1+ |
| PkiPath | 1+ |

The type and encodings are described in the [CertificateFactory section](https://developers.google.com/j2objc/javadoc/jre/technotes/guides/security/StandardNames.html#CertificateFactory) and the [CertPath Encodings section](https://developers.google.com/j2objc/javadoc/jre/technotes/guides/security/StandardNames.html#CertPathEncodings) of the Java Cryptography Architecture Standard Algorithm Name Documentation.

<br />

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Certificate.html`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertPath.html`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html`
- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html`

### Protected Constructor Summary

|---|---|
|   | [CertificateFactory](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#CertificateFactory(java.security.cert.CertificateFactorySpi,%20java.security.Provider,%20java.lang.String))([CertificateFactorySpi](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactorySpi.html) certFacSpi, [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html) provider, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type) Creates a CertificateFactory object of the given type, and encapsulates the given provider implementation (SPI object) in it. |

### Public Method Summary

|---|---|
| final [CRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html) | [generateCRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCRL(java.io.InputStream))([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream) Generates a certificate revocation list (CRL) object and initializes it with the data read from the input stream `inStream`. |
| final [Collection](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Collection.html)\<? extends [CRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html)\> | [generateCRLs](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCRLs(java.io.InputStream))([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream) Returns a (possibly empty) collection view of the CRLs read from the given input stream `inStream`. |
| final [CertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertPath.html) | [generateCertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCertPath(java.util.List<?%20extends%20java.security.cert.Certificate>))([List](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/List.html)\<? extends [Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html)\> certificates) Generates a `CertPath` object and initializes it with a `List` of `Certificate`s. |
| final [CertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertPath.html) | [generateCertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCertPath(java.io.InputStream))([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream) Generates a `CertPath` object and initializes it with the data read from the `InputStream` inStream. |
| final [CertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertPath.html) | [generateCertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCertPath(java.io.InputStream,%20java.lang.String))([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) encoding) Generates a `CertPath` object and initializes it with the data read from the `InputStream` inStream. |
| final [Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html) | [generateCertificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCertificate(java.io.InputStream))([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream) Generates a certificate object and initializes it with the data read from the input stream `inStream`. |
| final [Collection](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Collection.html)\<? extends [Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html)\> | [generateCertificates](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCertificates(java.io.InputStream))([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream) Returns a (possibly empty) collection view of the certificates read from the given input stream `inStream`. |
| final [Iterator](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Iterator.html)\<[String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)\> | [getCertPathEncodings](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#getCertPathEncodings())() Returns an iteration of the `CertPath` encodings supported by this certificate factory, with the default encoding first. |
| final static [CertificateFactory](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html) | [getInstance](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#getInstance(java.lang.String))([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type) Returns a certificate factory object that implements the specified certificate type. |
| final static [CertificateFactory](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html) | [getInstance](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#getInstance(java.lang.String,%20java.lang.String))([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) provider) Returns a certificate factory object for the specified certificate type. |
| final static [CertificateFactory](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html) | [getInstance](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#getInstance(java.lang.String,%20java.security.Provider))([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type, [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html) provider) Returns a certificate factory object for the specified certificate type. |
| final [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html) | [getProvider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#getProvider())() Returns the provider of this certificate factory. |
| final [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [getType](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#getType())() Returns the name of the certificate type associated with this certificate factory. |

### Inherited Method Summary

From class [java.lang.Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html)

|---|---|
| [Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) | [clone](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#clone())() Creates and returns a copy of this `Object`. |
| boolean | [equals](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#equals(java.lang.Object))([Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) obj) Compares this instance with the specified object and indicates if they are equal. |
| void | [finalize](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#finalize())() Invoked when the garbage collector has detected that this instance is no longer reachable. |
| final [Class](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Class.html)\<?\> | [getClass](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#getClass())() Returns the unique instance of `https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Class.html` that represents this object's class. |
| int | [hashCode](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#hashCode())() Returns an integer hash code for this object. |
| final void | [notify](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#notify())() Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |
| final void | [notifyAll](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#notifyAll())() Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up. |
| [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [toString](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#toString())() Returns a string containing a concise, human-readable description of this object. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait(long,%20int))(long timeout, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait(long))(long timeout) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires. |
| final void | [wait](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html#wait())() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object. |

## Protected Constructors

#### protected
**CertificateFactory**
([CertificateFactorySpi](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactorySpi.html) certFacSpi, [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html) provider, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type)

Creates a CertificateFactory object of the given type, and encapsulates
the given provider implementation (SPI object) in it.

##### Parameters

| certFacSpi | the provider implementation. |
| provider | the provider. |
| type | the certificate type. |
|---|---|

## Public Methods

#### public final [CRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html)
**generateCRL**
([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream)

Generates a certificate revocation list (CRL) object and initializes it
with the data read from the input stream `inStream`.

In order to take advantage of the specialized CRL format
supported by this certificate factory,
the returned CRL object can be typecast to the corresponding
CRL class. For example, if this certificate
factory implements X.509 CRLs, the returned CRL object
can be typecast to the `X509CRL` class.

Note that if the given input stream does not support
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#mark(int)` and
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#reset()`, this method will
consume the entire input stream. Otherwise, each call to this
method consumes one CRL and the read position of the input stream
is positioned to the next available byte after the inherent
end-of-CRL marker. If the data in the
input stream does not contain an inherent end-of-CRL marker (other
than EOF) and there is trailing data after the CRL is parsed, a
`CRLException` is thrown.

##### Parameters

| inStream | an input stream with the CRL data. |
|---|---|

##### Returns

- a CRL object initialized with the data from the input stream.

##### Throws

| [CRLException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRLException.html) | on parsing errors. |
|---|---|

#### public final [Collection](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Collection.html)\<? extends [CRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html)\>
**generateCRLs**
([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream)

Returns a (possibly empty) collection view of the CRLs read
from the given input stream `inStream`.

In order to take advantage of the specialized CRL format
supported by this certificate factory, each element in
the returned collection view can be typecast to the corresponding
CRL class. For example, if this certificate
factory implements X.509 CRLs, the elements in the returned
collection can be typecast to the `X509CRL` class.

In the case of a certificate factory for X.509 CRLs,
`inStream` may contain a sequence of DER-encoded CRLs.
In addition, `inStream` may contain a PKCS#7 CRL
set. This is a PKCS#7 *SignedData* object, with the only
significant field being *crls*. In particular, the
signature and the contents are ignored. This format allows multiple
CRLs to be downloaded at once. If no CRLs are present,
an empty collection is returned.

Note that if the given input stream does not support
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#mark(int)` and
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#reset()`, this method will
consume the entire input stream.

##### Parameters

| inStream | the input stream with the CRLs. |
|---|---|

##### Returns

- a (possibly empty) collection view of java.security.cert.CRL objects initialized with the data from the input stream.

##### Throws

| [CRLException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRLException.html) | on parsing errors. |
|---|---|

#### public final [CertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertPath.html)
**generateCertPath**
([List](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/List.html)\<? extends [Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html)\> certificates)

Generates a `CertPath` object and initializes it with
a `List` of `Certificate`s.


The certificates supplied must be of a type supported by the
`CertificateFactory`. They will be copied out of the supplied
`List` object.

##### Parameters

| certificates | a `List` of `Certificate`s |
|---|---|

##### Returns

- a `CertPath` initialized with the supplied list of certificates

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | if an exception occurs |
|---|---|

#### public final [CertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertPath.html)
**generateCertPath**
([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream)

Generates a `CertPath` object and initializes it with
the data read from the `InputStream` inStream. The data
is assumed to be in the default encoding. The name of the default
encoding is the first element of the `Iterator` returned by
the `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#getCertPathEncodings()` method.

##### Parameters

| inStream | an `InputStream` containing the data |
|---|---|

##### Returns

- a `CertPath` initialized with the data from the `InputStream`

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | if an exception occurs while decoding |
|---|---|

#### public final [CertPath](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertPath.html)
**generateCertPath**
([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) encoding)

Generates a `CertPath` object and initializes it with
the data read from the `InputStream` inStream. The data
is assumed to be in the specified encoding. See
the CertPath Encodings section in the [Java Cryptography Architecture Standard Algorithm Name Documentation](https://developers.google.com/j2objc/javadoc/jre/technotes/guides/security/StandardNames.html#CertPathEncodings)
for information about standard encoding names and their formats.

##### Parameters

| inStream | an `InputStream` containing the data |
| encoding | the encoding used for the data |
|---|---|

##### Returns

- a `CertPath` initialized with the data from the `InputStream`

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | if an exception occurs while decoding or the encoding requested is not supported |
|---|---|

#### public final [Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html)
**generateCertificate**
([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream)

Generates a certificate object and initializes it with
the data read from the input stream `inStream`.

In order to take advantage of the specialized certificate format
supported by this certificate factory,
the returned certificate object can be typecast to the corresponding
certificate class. For example, if this certificate
factory implements X.509 certificates, the returned certificate object
can be typecast to the `X509Certificate` class.

In the case of a certificate factory for X.509 certificates, the
certificate provided in `inStream` must be DER-encoded and
may be supplied in binary or printable (Base64) encoding. If the
certificate is provided in Base64 encoding, it must be bounded at
the beginning by ---BEGIN CERTIFICATE---, and must be bounded at
the end by ---END CERTIFICATE---.

Note that if the given input stream does not support
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#mark(int)` and
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#reset()`, this method will
consume the entire input stream. Otherwise, each call to this
method consumes one certificate and the read position of the
input stream is positioned to the next available byte after
the inherent end-of-certificate marker. If the data in the input stream
does not contain an inherent end-of-certificate marker (other
than EOF) and there is trailing data after the certificate is parsed, a
`CertificateException` is thrown.

##### Parameters

| inStream | an input stream with the certificate data. |
|---|---|

##### Returns

- a certificate object initialized with the data from the input stream.

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | on parsing errors. |
|---|---|

#### public final [Collection](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Collection.html)\<? extends [Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html)\>
**generateCertificates**
([InputStream](https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html) inStream)

Returns a (possibly empty) collection view of the certificates read
from the given input stream `inStream`.

In order to take advantage of the specialized certificate format
supported by this certificate factory, each element in
the returned collection view can be typecast to the corresponding
certificate class. For example, if this certificate
factory implements X.509 certificates, the elements in the returned
collection can be typecast to the `X509Certificate` class.

In the case of a certificate factory for X.509 certificates,
`inStream` may contain a sequence of DER-encoded certificates
in the formats described for
`https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html#generateCertificate(java.io.InputStream)`.
In addition, `inStream` may contain a PKCS#7 certificate
chain. This is a PKCS#7 *SignedData* object, with the only
significant field being *certificates*. In particular, the
signature and the contents are ignored. This format allows multiple
certificates to be downloaded at once. If no certificates are present,
an empty collection is returned.

Note that if the given input stream does not support
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#mark(int)` and
`https://developers.google.com/j2objc/javadoc/jre/reference/java/io/InputStream.html#reset()`, this method will
consume the entire input stream.

##### Parameters

| inStream | the input stream with the certificates. |
|---|---|

##### Returns

- a (possibly empty) collection view of java.security.cert.Certificate objects initialized with the data from the input stream.

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | on parsing errors. |
|---|---|

#### public final [Iterator](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Iterator.html)\<[String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)\>
**getCertPathEncodings**
()

Returns an iteration of the `CertPath` encodings supported
by this certificate factory, with the default encoding first. See
the CertPath Encodings section in the [Java Cryptography Architecture Standard Algorithm Name Documentation](https://developers.google.com/j2objc/javadoc/jre/technotes/guides/security/StandardNames.html#CertPathEncodings)
for information about standard encoding names and their formats.


Attempts to modify the returned `Iterator` via its
`remove` method result in an
`UnsupportedOperationException`.

##### Returns

- an `Iterator` over the names of the supported `CertPath` encodings (as `String`s)

#### public static final [CertificateFactory](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html)
**getInstance**
([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type)

Returns a certificate factory object that implements the
specified certificate type.

This method traverses the list of registered security Providers,
starting with the most preferred Provider.
A new CertificateFactory object encapsulating the
CertificateFactorySpi implementation from the first
Provider that supports the specified type is returned.

Note that the list of registered providers may be retrieved via
the `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Security.html#getProviders()` method.

##### Parameters

| type | the name of the requested certificate type. See the CertificateFactory section in the [Java Cryptography Architecture Standard Algorithm Name Documentation](https://developers.google.com/j2objc/javadoc/jre/technotes/guides/security/StandardNames.html#CertificateFactory) for information about standard certificate types. |
|---|---|

##### Returns

- a certificate factory object for the specified type.

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | if no Provider supports a CertificateFactorySpi implementation for the specified type. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html`

#### public static final [CertificateFactory](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html)
**getInstance**
([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) provider)

Returns a certificate factory object for the specified
certificate type.

A new CertificateFactory object encapsulating the
CertificateFactorySpi implementation from the specified provider
is returned. The specified provider must be registered
in the security provider list.

Note that the list of registered providers may be retrieved via
the `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Security.html#getProviders()` method.

##### Parameters

| type | the certificate type. See the CertificateFactory section in the [Java Cryptography Architecture Standard Algorithm Name Documentation](https://developers.google.com/j2objc/javadoc/jre/technotes/guides/security/StandardNames.html#CertificateFactory) for information about standard certificate types. |
| provider | the name of the provider. |
|---|---|

##### Returns

- a certificate factory object for the specified type.

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | if a CertificateFactorySpi implementation for the specified algorithm is not available from the specified provider. |
| [NoSuchProviderException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/NoSuchProviderException.html) | if the specified provider is not registered in the security provider list. |
| [IllegalArgumentException](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/IllegalArgumentException.html) | if the provider name is null or empty. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html`

#### public static final [CertificateFactory](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html)
**getInstance**
([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) type, [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html) provider)

Returns a certificate factory object for the specified
certificate type.

A new CertificateFactory object encapsulating the
CertificateFactorySpi implementation from the specified Provider
object is returned. Note that the specified Provider object
does not have to be registered in the provider list.

##### Parameters

| type | the certificate type. See the CertificateFactory section in the [Java Cryptography Architecture Standard Algorithm Name Documentation](https://developers.google.com/j2objc/javadoc/jre/technotes/guides/security/StandardNames.html#CertificateFactory) for information about standard certificate types. |
| provider | the provider. |
|---|---|

##### Returns

- a certificate factory object for the specified type.

##### Throws

| [CertificateException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateException.html) | if a CertificateFactorySpi implementation for the specified algorithm is not available from the specified Provider object. |
| [IllegalArgumentException](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/IllegalArgumentException.html) | if the `provider` is null. |
|---|---|

##### See Also

- `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html`

#### public final [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html)
**getProvider**
()

Returns the provider of this certificate factory.

##### Returns

- the provider of this certificate factory.

#### public final [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)
**getType**
()

Returns the name of the certificate type associated with this
certificate factory.

##### Returns

- the name of the certificate type associated with this certificate factory.