# X509CRL public abstract class **X509CRL** extends [CRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html) implements [X509Extension](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Extension.html)
Abstract class for an X.509 Certificate Revocation List (CRL). A CRL is a time-stamped list identifying revoked certificates. It is signed by a Certificate Authority (CA) and made freely available in a public repository. Each revoked certificate is identified in a CRL by its certificate serial number. When a certificate-using system uses a certificate (e.g., for verifying a remote user's digital signature), that system not only checks the certificate signature and validity but also acquires a suitably- recent CRL and checks that the certificate serial number is not on that CRL. The meaning of "suitably-recent" may vary with local policy, but it usually means the most recently-issued CRL. A CA issues a new CRL on a regular periodic basis (e.g., hourly, daily, or weekly). Entries are added to CRLs as revocations occur, and an entry may be removed when the certificate expiration date is reached. The X.509 v2 CRL format is described below in ASN.1: ``` CertificateList ::= SEQUENCE { tbsCertList TBSCertList, signatureAlgorithm AlgorithmIdentifier, signature BIT STRING } ``` More information can be found in [RFC 3280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile](http://www.ietf.org/rfc/rfc3280.txt). The ASN.1 definition of `tbsCertList` is: ``` TBSCertList ::= SEQUENCE { version Version OPTIONAL, -- if present, must be v2 signature AlgorithmIdentifier, issuer Name, thisUpdate ChoiceOfTime, nextUpdate ChoiceOfTime OPTIONAL, revokedCertificates SEQUENCE OF SEQUENCE { userCertificate CertificateSerialNumber, revocationDate ChoiceOfTime, crlEntryExtensions Extensions OPTIONAL -- if present, must be v2 } OPTIONAL, crlExtensions [0] EXPLICIT Extensions OPTIONAL -- if present, must be v2 } ``` CRLs are instantiated using a certificate factory. The following is an example of how to instantiate an X.509 CRL: try (InputStream inStream = new FileInputStream("fileName-of-crl")) { CertificateFactory cf = CertificateFactory.getInstance("X.509"); X509CRL crl = (X509CRL)cf.generateCRL(inStream); }
##### See Also - `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html` - `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CertificateFactory.html` - `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Extension.html` ### Protected Constructor Summary |---|---| | | [X509CRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#X509CRL())() Constructor for X.509 CRLs. | ### Public Method Summary |---|---| | boolean | [equals](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#equals(java.lang.Object))([Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) other) Compares this CRL for equality with the given object. | | abstract byte\[\] | [getEncoded](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getEncoded())() Returns the ASN.1 DER-encoded form of this CRL. | | abstract [Principal](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Principal.html) | [getIssuerDN](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getIssuerDN())() **Denigrated**, replaced by {@linkplain #getIssuerX500Principal()}. | | [X500Principal](https://developers.google.com/j2objc/javadoc/jre/reference/javax/security/auth/x500/X500Principal.html) | [getIssuerX500Principal](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getIssuerX500Principal())() Returns the issuer (issuer distinguished name) value from the CRL as an `X500Principal`. | | abstract [Date](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Date.html) | [getNextUpdate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getNextUpdate())() Gets the `nextUpdate` date from the CRL. | | [X509CRLEntry](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRLEntry.html) | [getRevokedCertificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getRevokedCertificate(java.security.cert.X509Certificate))([X509Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Certificate.html) certificate) Get the CRL entry, if any, for the given certificate. | | abstract [X509CRLEntry](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRLEntry.html) | [getRevokedCertificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getRevokedCertificate(java.math.BigInteger))(BigInteger serialNumber) Gets the CRL entry, if any, with the given certificate serialNumber. | | abstract [Set](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Set.html)\ | [getRevokedCertificates](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getRevokedCertificates())() Gets all the entries from this CRL. | | abstract [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [getSigAlgName](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getSigAlgName())() Gets the signature algorithm name for the CRL signature algorithm. | | abstract [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [getSigAlgOID](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getSigAlgOID())() Gets the signature algorithm OID string from the CRL. | | abstract byte\[\] | [getSigAlgParams](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getSigAlgParams())() Gets the DER-encoded signature algorithm parameters from this CRL's signature algorithm. | | abstract byte\[\] | [getSignature](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getSignature())() Gets the `signature` value (the raw signature bits) from the CRL. | | abstract byte\[\] | [getTBSCertList](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getTBSCertList())() Gets the DER-encoded CRL information, the `tbsCertList` from this CRL. | | abstract [Date](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Date.html) | [getThisUpdate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getThisUpdate())() Gets the `thisUpdate` date from the CRL. | | abstract int | [getVersion](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getVersion())() Gets the `version` (version number) value from the CRL. | | int | [hashCode](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#hashCode())() Returns a hashcode value for this CRL from its encoded form. | | void | [verify](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#verify(java.security.PublicKey,%20java.security.Provider))([PublicKey](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/PublicKey.html) key, [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html) sigProvider) Verifies that this CRL was signed using the private key that corresponds to the given public key. | | abstract void | [verify](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#verify(java.security.PublicKey))([PublicKey](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/PublicKey.html) key) Verifies that this CRL was signed using the private key that corresponds to the given public key. | | abstract void | [verify](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#verify(java.security.PublicKey,%20java.lang.String))([PublicKey](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/PublicKey.html) key, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) sigProvider) Verifies that this CRL was signed using the private key that corresponds to the given public key. | ### Inherited Method Summary From class [java.security.cert.CRL](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html) |---|---| | 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/CRL.html#getType())() Returns the type of this CRL. | | abstract boolean | [isRevoked](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html#isRevoked(java.security.cert.Certificate))([Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/Certificate.html) cert) Checks whether the given certificate is on this CRL. | | abstract [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) | [toString](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRL.html#toString())() Returns a string representation of this CRL. | 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. | From interface [java.security.cert.X509Extension](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Extension.html) |---|---| | abstract [Set](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Set.html)\<[String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)\> | [getCriticalExtensionOIDs](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Extension.html#getCriticalExtensionOIDs())() Gets a Set of the OID strings for the extension(s) marked CRITICAL in the certificate/CRL managed by the object implementing this interface. | | abstract byte\[\] | [getExtensionValue](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Extension.html#getExtensionValue(java.lang.String))([String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) oid) Gets the DER-encoded OCTET string for the extension value (*extnValue* ) identified by the passed-in `oid` String. | | abstract [Set](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Set.html)\<[String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html)\> | [getNonCriticalExtensionOIDs](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Extension.html#getNonCriticalExtensionOIDs())() Gets a Set of the OID strings for the extension(s) marked NON-CRITICAL in the certificate/CRL managed by the object implementing this interface. | | abstract boolean | [hasUnsupportedCriticalExtension](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Extension.html#hasUnsupportedCriticalExtension())() Check if there is a critical extension that is not supported. | ## Protected Constructors #### protected **X509CRL** () Constructor for X.509 CRLs. ## Public Methods #### public boolean **equals** ([Object](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/Object.html) other) Compares this CRL for equality with the given object. If the `other` object is an `instanceof` `X509CRL`, then its encoded form is retrieved and compared with the encoded form of this CRL. ##### Parameters | other | the object to test for equality with this CRL. | |---|---| ##### Returns - true iff the encoded forms of the two CRLs match, false otherwise. #### public abstract byte\[\] **getEncoded** () Returns the ASN.1 DER-encoded form of this CRL. ##### Returns - the encoded form of this certificate ##### Throws | [CRLException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRLException.html) | if an encoding error occurs. | |---|---| #### public abstract [Principal](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Principal.html) **getIssuerDN** () **Denigrated** , replaced by {@linkplain #getIssuerX500Principal()}. This method returns the `issuer` as an implementation specific Principal object, which should not be relied upon by portable code. Gets the `issuer` (issuer distinguished name) value from the CRL. The issuer name identifies the entity that signed (and issued) the CRL. The issuer name field contains an X.500 distinguished name (DN). The ASN.1 definition for this is: ``` issuer Name Name ::= CHOICE { RDNSequence } RDNSequence ::= SEQUENCE OF RelativeDistinguishedName RelativeDistinguishedName ::= SET OF AttributeValueAssertion AttributeValueAssertion ::= SEQUENCE { AttributeType, AttributeValue } AttributeType ::= OBJECT IDENTIFIER AttributeValue ::= ANY ``` The `Name` describes a hierarchical name composed of attributes, such as country name, and corresponding values, such as US. The type of the `AttributeValue` component is determined by the `AttributeType`; in general it will be a `directoryString`. A `directoryString` is usually one of `PrintableString`, `TeletexString` or `UniversalString`.
##### Returns - a Principal whose name is the issuer distinguished name. #### public [X500Principal](https://developers.google.com/j2objc/javadoc/jre/reference/javax/security/auth/x500/X500Principal.html) **getIssuerX500Principal** () Returns the issuer (issuer distinguished name) value from the CRL as an `X500Principal`. It is recommended that subclasses override this method. ##### Returns - an `X500Principal` representing the issuer distinguished name #### public abstract [Date](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Date.html) **getNextUpdate** () Gets the `nextUpdate` date from the CRL. ##### Returns - the `nextUpdate` date from the CRL, or null if not present. #### public [X509CRLEntry](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRLEntry.html) **getRevokedCertificate** ([X509Certificate](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509Certificate.html) certificate) Get the CRL entry, if any, for the given certificate. This method can be used to lookup CRL entries in indirect CRLs, that means CRLs that contain entries from issuers other than the CRL issuer. The default implementation will only return entries for certificates issued by the CRL issuer. Subclasses that wish to support indirect CRLs should override this method. ##### Parameters | certificate | the certificate for which a CRL entry is to be looked up | |---|---| ##### Returns - the entry for the given certificate, or null if no such entry exists in this CRL. ##### Throws | [NullPointerException](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/NullPointerException.html) | if certificate is null | |---|---| #### public abstract [X509CRLEntry](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRLEntry.html) **getRevokedCertificate** (BigInteger serialNumber) Gets the CRL entry, if any, with the given certificate serialNumber. ##### Parameters | serialNumber | the serial number of the certificate for which a CRL entry is to be looked up | |---|---| ##### Returns - the entry with the given serial number, or null if no such entry exists in this CRL. ##### See Also - `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRLEntry.html` #### public abstract [Set](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Set.html)\ **getRevokedCertificates** () Gets all the entries from this CRL. This returns a Set of X509CRLEntry objects. ##### Returns - all the entries or null if there are none present. ##### See Also - `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRLEntry.html` #### public abstract [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) **getSigAlgName** () Gets the signature algorithm name for the CRL signature algorithm. An example is the string "SHA256withRSA". The ASN.1 definition for this is: ``` signatureAlgorithm AlgorithmIdentifier AlgorithmIdentifier ::= SEQUENCE { algorithm OBJECT IDENTIFIER, parameters ANY DEFINED BY algorithm OPTIONAL } -- contains a value of the type -- registered for use with the -- algorithm object identifier value ``` The algorithm name is determined from the `algorithm` OID string. ##### Returns - the signature algorithm name. #### public abstract [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) **getSigAlgOID** () Gets the signature algorithm OID string from the CRL. An OID is represented by a set of nonnegative whole numbers separated by periods. For example, the string "1.2.840.10040.4.3" identifies the SHA-1 with DSA signature algorithm defined in [RFC 3279: Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and CRL Profile](http://www.ietf.org/rfc/rfc3279.txt). See `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getSigAlgName()` for relevant ASN.1 definitions. ##### Returns - the signature algorithm OID string. #### public abstract byte\[\] **getSigAlgParams** () Gets the DER-encoded signature algorithm parameters from this CRL's signature algorithm. In most cases, the signature algorithm parameters are null; the parameters are usually supplied with the public key. If access to individual parameter values is needed then use `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/AlgorithmParameters.html` and instantiate with the name returned by `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getSigAlgName()`. See `https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/X509CRL.html#getSigAlgName()` for relevant ASN.1 definitions. ##### Returns - the DER-encoded signature algorithm parameters, or null if no parameters are present. #### public abstract byte\[\] **getSignature** () Gets the `signature` value (the raw signature bits) from the CRL. The ASN.1 definition for this is: ``` signature BIT STRING ```
##### Returns - the signature. #### public abstract byte\[\] **getTBSCertList** () Gets the DER-encoded CRL information, the `tbsCertList` from this CRL. This can be used to verify the signature independently. ##### Returns - the DER-encoded CRL information. ##### Throws | [CRLException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRLException.html) | if an encoding error occurs. | |---|---| #### public abstract [Date](https://developers.google.com/j2objc/javadoc/jre/reference/java/util/Date.html) **getThisUpdate** () Gets the `thisUpdate` date from the CRL. The ASN.1 definition for this is: ``` thisUpdate ChoiceOfTime ChoiceOfTime ::= CHOICE { utcTime UTCTime, generalTime GeneralizedTime } ```
##### Returns - the `thisUpdate` date from the CRL. #### public abstract int **getVersion** () Gets the `version` (version number) value from the CRL. The ASN.1 definition for this is: ``` version Version OPTIONAL, -- if present, must be v2 Version ::= INTEGER { v1(0), v2(1), v3(2) } -- v3 does not apply to CRLs but appears for consistency -- with definition of Version for certs ```
##### Returns - the version number, i.e. 1 or 2. #### public int **hashCode** () Returns a hashcode value for this CRL from its encoded form. ##### Returns - the hashcode value. #### public void **verify** ([PublicKey](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/PublicKey.html) key, [Provider](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/Provider.html) sigProvider) Verifies that this CRL was signed using the private key that corresponds to the given public key. This method uses the signature verification engine supplied by the given provider. Note that the specified Provider object does not have to be registered in the provider list. This method was added to version 1.8 of the Java Platform Standard Edition. In order to maintain backwards compatibility with existing service providers, this method is not `abstract` and it provides a default implementation. ##### Parameters | key | the PublicKey used to carry out the verification. | | sigProvider | the signature provider. | |---|---| ##### Throws | [NoSuchAlgorithmException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/NoSuchAlgorithmException.html) | on unsupported signature algorithms. | | [InvalidKeyException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/InvalidKeyException.html) | on incorrect key. | | [SignatureException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/SignatureException.html) | on signature errors. | | [CRLException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRLException.html) | on encoding errors. | |---|---| #### public abstract void **verify** ([PublicKey](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/PublicKey.html) key) Verifies that this CRL was signed using the private key that corresponds to the given public key. ##### Parameters | key | the PublicKey used to carry out the verification. | |---|---| ##### Throws | [NoSuchAlgorithmException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/NoSuchAlgorithmException.html) | on unsupported signature algorithms. | | [InvalidKeyException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/InvalidKeyException.html) | on incorrect key. | | [NoSuchProviderException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/NoSuchProviderException.html) | if there's no default provider. | | [SignatureException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/SignatureException.html) | on signature errors. | | [CRLException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRLException.html) | on encoding errors. | |---|---| #### public abstract void **verify** ([PublicKey](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/PublicKey.html) key, [String](https://developers.google.com/j2objc/javadoc/jre/reference/java/lang/String.html) sigProvider) Verifies that this CRL was signed using the private key that corresponds to the given public key. This method uses the signature verification engine supplied by the given provider. ##### Parameters | key | the PublicKey used to carry out the verification. | | sigProvider | the name of the signature provider. | |---|---| ##### Throws | [NoSuchAlgorithmException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/NoSuchAlgorithmException.html) | on unsupported signature algorithms. | | [InvalidKeyException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/InvalidKeyException.html) | on incorrect key. | | [NoSuchProviderException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/NoSuchProviderException.html) | on incorrect provider. | | [SignatureException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/SignatureException.html) | on signature errors. | | [CRLException](https://developers.google.com/j2objc/javadoc/jre/reference/java/security/cert/CRLException.html) | on encoding errors. | |---|---|