public Class X509CertificateObject

Implements abstract java.security.cert.X509Certificate.checkValidity.

Doc from java.security.cert.X509Certificate.checkValidity.

Checks that the certificate is currently valid. It is if the current date and time are within the validity period given in the certificate.

The validity period consists of two date/time values: the first and last dates (and times) on which the certificate is valid. It is defined in ASN.1 as:

validity             Validity

Validity ::= SEQUENCE {
    notBefore      CertificateValidityDate,
    notAfter       CertificateValidityDate }

CertificateValidityDate ::= CHOICE {
    utcTime        UTCTime,
    generalTime    GeneralizedTime }

Exceptions

CertificateExpiredException:

if the certificate has expired.

CertificateNotYetValidException:

if the certificate is not yet valid.

Implements abstract java.security.cert.X509Certificate.checkValidity.

Doc from java.security.cert.X509Certificate.checkValidity.

Checks that the given date is within the certificate's validity period. In other words, this determines whether the certificate would be valid at the given date/time.

Parameters

date:Date

the Date to check against to see if this certificate is valid at that date/time.

Exceptions

CertificateExpiredException:

if the certificate has expired with respect to the date supplied.

CertificateNotYetValidException:

if the certificate is not yet valid with respect to the date supplied.

Overrides java.security.cert.Certificate.equals.

Doc from java.security.cert.Certificate.equals.

Compares this certificate for equality with the specified object. If the other object is an instanceof Certificate, then its encoded form is retrieved and compared with the encoded form of this certificate.

Parameters

o:Object

the object to test for equality with this certificate.

Returns:boolean

true iff the encoded forms of the two certificates match, false otherwise.

Implements org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier.getBagAttribute.

Implements org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier.getBagAttributeKeys.

Implements abstract java.security.cert.X509Certificate.getBasicConstraints.

Doc from java.security.cert.X509Certificate.getBasicConstraints.

Gets the certificate constraints path length from the critical BasicConstraints extension, (OID = 2.5.29.19).

The basic constraints extension identifies whether the subject of the certificate is a Certificate Authority (CA) and how deep a certification path may exist through that CA. The pathLenConstraint field (see below) is meaningful only if cA is set to TRUE. In this case, it gives the maximum number of CA certificates that may follow this certificate in a certification path. A value of zero indicates that only an end-entity certificate may follow in the path.

The ASN.1 definition for this is:

BasicConstraints ::= SEQUENCE {
    cA                  BOOLEAN DEFAULT FALSE,
    pathLenConstraint   INTEGER (0..MAX) OPTIONAL }

Returns:int

the value of pathLenConstraint if the BasicConstraints extension is present in the certificate and the subject of the certificate is a CA, otherwise -1. If the subject of the certificate is a CA and pathLenConstraint does not appear, Integer.MAX_VALUE is returned to indicate that there is no limit to the allowed length of the certification path.

Implements java.security.cert.X509Extension.getCriticalExtensionOIDs.

Doc from java.security.cert.X509Extension.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. Here is sample code to get a Set of critical extensions from an X509Certificate and print the OIDs:

X509Certificate cert = null;
try (InputStream inStrm = new FileInputStream("DER-encoded-Cert")) {
    CertificateFactory cf = CertificateFactory.getInstance("X.509");
    cert = (X509Certificate)cf.generateCertificate(inStrm);
}

Set<String> critSet = cert.getCriticalExtensionOIDs();
if (critSet != null && !critSet.isEmpty()) {
    System.out.println("Set of critical extensions:");
    for (String oid : critSet) {
        System.out.println(oid);
    }
}

Returns:Set<E>

a Set (or an empty Set if none are marked critical) of the extension OID strings for extensions that are marked critical. If there are no extensions present at all, then this method returns null.

Implements abstract java.security.cert.Certificate.getEncoded.

Doc from java.security.cert.Certificate.getEncoded.

Returns the encoded form of this certificate. It is assumed that each certificate type would have only a single form of encoding; for example, X.509 certificates would be encoded as ASN.1 DER.

Returns:byte[]

the encoded form of this certificate

Exceptions

CertificateEncodingException:

if an encoding error occurs.

Overrides java.security.cert.X509Certificate.getExtendedKeyUsage.

Doc from java.security.cert.X509Certificate.getExtendedKeyUsage.

Gets an unmodifiable list of Strings representing the OBJECT IDENTIFIERs of the ExtKeyUsageSyntax field of the extended key usage extension, (OID = 2.5.29.37). It indicates one or more purposes for which the certified public key may be used, in addition to or in place of the basic purposes indicated in the key usage extension field. The ASN.1 definition for this is:

ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId

KeyPurposeId ::= OBJECT IDENTIFIER

This method was added to version 1.4 of the Java 2 Platform Standard Edition. In order to maintain backwards compatibility with existing service providers, this method is not abstract and it provides a default implementation. Subclasses should override this method with a correct implementation.

Returns:List<E>

the ExtendedKeyUsage extension of this certificate, as an unmodifiable list of object identifiers represented as Strings. Returns null if this certificate does not contain an ExtendedKeyUsage extension.

Exceptions

CertificateParsingException:

if the extension cannot be decoded

Implements java.security.cert.X509Extension.getExtensionValue.

Doc from java.security.cert.X509Extension.getExtensionValue.

Gets the DER-encoded OCTET string for the extension value (extnValue) identified by the passed-in oid String. The oid string is represented by a set of nonnegative whole numbers separated by periods.

For example:

Parameters

oid:String

the Object Identifier value for the extension.

Returns:byte[]

the DER-encoded octet string of the extension value or null if it is not present.

Overrides java.security.cert.X509Certificate.getIssuerAlternativeNames.

Doc from java.security.cert.X509Certificate.getIssuerAlternativeNames.

Gets an immutable collection of issuer alternative names from the IssuerAltName extension, (OID = 2.5.29.18).

The ASN.1 definition of the IssuerAltName extension is:

IssuerAltName ::= GeneralNames

If this certificate does not contain an IssuerAltName extension, null is returned. Otherwise, a Collection is returned with an entry representing each GeneralName included in the extension. Each entry is a List whose first entry is an Integer (the name type, 0-8) and whose second entry is a String or a byte array (the name, in string or ASN.1 DER encoded form, respectively). More entries may exist depending on the name type. For more details about the formats used for each name type, see the getSubjectAlternativeNames method.

Note that the Collection returned may contain more than one name of the same type. Also, note that the returned Collection is immutable and any entries containing byte arrays are cloned to protect against subsequent modifications.

This method was added to version 1.4 of the Java 2 Platform Standard Edition. In order to maintain backwards compatibility with existing service providers, this method is not abstract and it provides a default implementation. Subclasses should override this method with a correct implementation.

Returns:Collection<E>

an immutable Collection of issuer alternative names (or null)

Exceptions

CertificateParsingException:

if the extension cannot be decoded

Implements abstract java.security.cert.X509Certificate.getIssuerDN.

Doc from java.security.cert.X509Certificate.getIssuerDN.

Gets the issuer (issuer distinguished name) value from the certificate. The issuer name identifies the entity that signed (and issued) the certificate.

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

Returns:Principal

a Principal whose name is the issuer distinguished name.

Implements abstract java.security.cert.X509Certificate.getIssuerUniqueID.

Doc from java.security.cert.X509Certificate.getIssuerUniqueID.

Gets the issuerUniqueID value from the certificate. The issuer unique identifier is present in the certificate to handle the possibility of reuse of issuer names over time. RFC 5280 recommends that names not be reused and that conforming certificates not make use of unique identifiers. Applications conforming to that profile should be capable of parsing unique identifiers and making comparisons.

The ASN.1 definition for this is:

issuerUniqueID  [1]  IMPLICIT UniqueIdentifier OPTIONAL

UniqueIdentifier  ::=  BIT STRING

Returns:boolean[]

the issuer unique identifier or null if it is not present in the certificate.

Overrides java.security.cert.X509Certificate.getIssuerX500Principal.

Doc from java.security.cert.X509Certificate.getIssuerX500Principal.

Returns the issuer (issuer distinguished name) value from the certificate as an X500Principal.

It is recommended that subclasses override this method.

Returns:X500Principal

an X500Principal representing the issuer distinguished name

Implements abstract java.security.cert.X509Certificate.getKeyUsage.

Doc from java.security.cert.X509Certificate.getKeyUsage.

Gets a boolean array representing bits of the KeyUsage extension, (OID = 2.5.29.15). The key usage extension defines the purpose (e.g., encipherment, signature, certificate signing) of the key contained in the certificate. The ASN.1 definition for this is:

KeyUsage ::= BIT STRING {
    digitalSignature        (0),
    nonRepudiation          (1),
    keyEncipherment         (2),
    dataEncipherment        (3),
    keyAgreement            (4),
    keyCertSign             (5),
    cRLSign                 (6),
    encipherOnly            (7),
    decipherOnly            (8) }

Returns:boolean[]

the KeyUsage extension of this certificate, represented as an array of booleans. The order of KeyUsage values in the array is the same as in the above ASN.1 definition. The array will contain a value for each KeyUsage defined above. If the KeyUsage list encoded in the certificate is longer than the above list, it will not be truncated. Returns null if this certificate does not contain a KeyUsage extension.

Implements java.security.cert.X509Extension.getNonCriticalExtensionOIDs.

Doc from java.security.cert.X509Extension.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. Here is sample code to get a Set of non-critical extensions from an X509CRL revoked certificate entry and print the OIDs:

CertificateFactory cf = null;
X509CRL crl = null;
try (InputStream inStrm = new FileInputStream("DER-encoded-CRL")) {
    cf = CertificateFactory.getInstance("X.509");
    crl = (X509CRL)cf.generateCRL(inStrm);
}

byte[] certData = <DER-encoded certificate data>
ByteArrayInputStream bais = new ByteArrayInputStream(certData);
X509Certificate cert = (X509Certificate)cf.generateCertificate(bais);
X509CRLEntry badCert =
             crl.getRevokedCertificate(cert.getSerialNumber());

if (badCert != null) {
    Set<String> nonCritSet = badCert.getNonCriticalExtensionOIDs();
    if (nonCritSet != null)
        for (String oid : nonCritSet) {
            System.out.println(oid);
        }
}

Returns:Set<E>

a Set (or an empty Set if none are marked non-critical) of the extension OID strings for extensions that are marked non-critical. If there are no extensions present at all, then this method returns null.

Implements abstract java.security.cert.X509Certificate.getNotAfter.

Doc from java.security.cert.X509Certificate.getNotAfter.

Gets the notAfter date from the validity period of the certificate. See getNotBefore for relevant ASN.1 definitions.

Returns:Date

the end date of the validity period.

Implements abstract java.security.cert.X509Certificate.getNotBefore.

Doc from java.security.cert.X509Certificate.getNotBefore.

Gets the notBefore date from the validity period of the certificate. The relevant ASN.1 definitions are:

validity             Validity

Validity ::= SEQUENCE {
    notBefore      CertificateValidityDate,
    notAfter       CertificateValidityDate }

CertificateValidityDate ::= CHOICE {
    utcTime        UTCTime,
    generalTime    GeneralizedTime }

Returns:Date

the start date of the validity period.

Implements abstract java.security.cert.Certificate.getPublicKey.

Doc from java.security.cert.Certificate.getPublicKey.

Gets the public key from this certificate.

Returns:PublicKey

the public key.

Implements abstract java.security.cert.X509Certificate.getSerialNumber.

Doc from java.security.cert.X509Certificate.getSerialNumber.

Gets the serialNumber value from the certificate. The serial number is an integer assigned by the certification authority to each certificate. It must be unique for each certificate issued by a given CA (i.e., the issuer name and serial number identify a unique certificate). The ASN.1 definition for this is:

serialNumber     CertificateSerialNumber

CertificateSerialNumber  ::=  INTEGER

Returns:BigInteger

the serial number.

Implements abstract java.security.cert.X509Certificate.getSigAlgName.

return a more "meaningful" representation for the signature algorithm used in the certficate.

Returns:String

Doc from java.security.cert.X509Certificate.getSigAlgName.

the signature algorithm name.

Implements abstract java.security.cert.X509Certificate.getSigAlgOID.

return the object identifier for the signature.

Returns:String

Doc from java.security.cert.X509Certificate.getSigAlgOID.

the signature algorithm OID string.

Implements abstract java.security.cert.X509Certificate.getSigAlgParams.

return the signature parameters, or null if there aren't any.

Returns:byte[]

Doc from java.security.cert.X509Certificate.getSigAlgParams.

the DER-encoded signature algorithm parameters, or null if no parameters are present.

Implements abstract java.security.cert.X509Certificate.getSignature.

Doc from java.security.cert.X509Certificate.getSignature.

Gets the signature value (the raw signature bits) from the certificate. The ASN.1 definition for this is:

signature     BIT STRING

Returns:byte[]

the signature.

Overrides java.security.cert.X509Certificate.getSubjectAlternativeNames.

Doc from java.security.cert.X509Certificate.getSubjectAlternativeNames.

Gets an immutable collection of subject alternative names from the SubjectAltName extension, (OID = 2.5.29.17).

The ASN.1 definition of the SubjectAltName extension is:

SubjectAltName ::= GeneralNames

GeneralNames :: = SEQUENCE SIZE (1..MAX) OF GeneralName

GeneralName ::= CHOICE {
     otherName                       [0]     OtherName,
     rfc822Name                      [1]     IA5String,
     dNSName                         [2]     IA5String,
     x400Address                     [3]     ORAddress,
     directoryName                   [4]     Name,
     ediPartyName                    [5]     EDIPartyName,
     uniformResourceIdentifier       [6]     IA5String,
     iPAddress                       [7]     OCTET STRING,
     registeredID                    [8]     OBJECT IDENTIFIER}

OtherName ::= SEQUENCE {
     type-id    OBJECT IDENTIFIER,
     value      [0] EXPLICIT ANY DEFINED BY type-id }

If this certificate does not contain a SubjectAltName extension, null is returned. Otherwise, a Collection is returned with an entry representing each GeneralName included in the extension. Each entry is a List whose first entry is an Integer (the name type, 0-8) and whose second entry is a String or a byte array (the name, in string or ASN.1 DER encoded form, respectively). More entries may exist depending on the name type.

RFC 822, DNS, and URI names are returned as Strings, using the well-established string formats for those types (subject to the restrictions included in RFC 5280). IPv4 address names are returned using dotted quad notation. IPv6 address names are returned in the form "a1:a2:...:a8", where a1-a8 are hexadecimal values representing the eight 16-bit pieces of the address. OID names are returned as Strings represented as a series of nonnegative integers separated by periods. Directory names (distinguished names) are returned in RFC 2253 string format. No standard string format is defined for X.400 names or EDI party names. They are returned as byte arrays containing the ASN.1 DER encoded form of the name. otherNames are also returned as byte arrays containing the ASN.1 DER encoded form of the name. A third entry may also be present in the list containing the type-id of the otherName in string form, and a fourth entry containing its value as either a string (if the value is a valid supported character string) or a byte array containing the ASN.1 DER encoded form of the value without the context-specific constructed tag with number 0.

Note that the Collection returned may contain more than one name of the same type. Also, note that the returned Collection is immutable and any entries containing byte arrays are cloned to protect against subsequent modifications.

This method was added to version 1.4 of the Java 2 Platform Standard Edition. In order to maintain backwards compatibility with existing service providers, this method is not abstract and it provides a default implementation. Subclasses should override this method with a correct implementation.

Returns:Collection<E>

an immutable Collection of subject alternative names (or null)

Exceptions

CertificateParsingException:

if the extension cannot be decoded

Implements abstract java.security.cert.X509Certificate.getSubjectDN.

Doc from java.security.cert.X509Certificate.getSubjectDN.

Gets the subject (subject distinguished name) value from the certificate. If the subject value is empty, then the getName() method of the returned Principal object returns an empty string ("").

The ASN.1 definition for this is:

subject    Name

See getIssuerDN for Name and other relevant definitions.

Returns:Principal

a Principal whose name is the subject name.

Implements abstract java.security.cert.X509Certificate.getSubjectUniqueID.

Doc from java.security.cert.X509Certificate.getSubjectUniqueID.

Gets the subjectUniqueID value from the certificate.

The ASN.1 definition for this is:

subjectUniqueID  [2]  IMPLICIT UniqueIdentifier OPTIONAL

UniqueIdentifier  ::=  BIT STRING

Returns:boolean[]

the subject unique identifier or null if it is not present in the certificate.

Overrides java.security.cert.X509Certificate.getSubjectX500Principal.

Doc from java.security.cert.X509Certificate.getSubjectX500Principal.

Returns the subject (subject distinguished name) value from the certificate as an X500Principal. If the subject value is empty, then the getName() method of the returned X500Principal object returns an empty string ("").

It is recommended that subclasses override this method.

Returns:X500Principal

an X500Principal representing the subject distinguished name

Implements abstract java.security.cert.X509Certificate.getTBSCertificate.

Doc from java.security.cert.X509Certificate.getTBSCertificate.

Gets the DER-encoded certificate information, the tbsCertificate from this certificate. This can be used to verify the signature independently.

Returns:byte[]

the DER-encoded certificate information.

Exceptions

CertificateEncodingException:

if an encoding error occurs.

Implements abstract java.security.cert.X509Certificate.getVersion.

Doc from java.security.cert.X509Certificate.getVersion.

Gets the version (version number) value from the certificate. The ASN.1 definition for this is:

version  [0] EXPLICIT Version DEFAULT v1

Version ::=  INTEGER  {  v1(0), v2(1), v3(2)  }

Returns:int

the version number, i.e. 1, 2 or 3.

Overrides java.security.cert.Certificate.hashCode.

Doc from java.security.cert.Certificate.hashCode.

Returns a hashcode value for this certificate from its encoded form.

Returns:int

the hashcode value.

Implements java.security.cert.X509Extension.hasUnsupportedCriticalExtension.

Doc from java.security.cert.X509Extension.hasUnsupportedCriticalExtension.

Check if there is a critical extension that is not supported.

Returns:boolean

true if a critical extension is found that is not supported, otherwise false.

Implements org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier.setBagAttribute.

Implements abstract java.security.cert.Certificate.toString.

Doc from java.security.cert.Certificate.toString.

Returns a string representation of this certificate.

Returns:String

a string representation of this certificate.

Implements abstract java.security.cert.Certificate.verify.

Doc from java.security.cert.Certificate.verify.

Verifies that this certificate was signed using the private key that corresponds to the specified public key.

Parameters

key:PublicKey

the PublicKey used to carry out the verification.

Exceptions

CertificateException:

on encoding errors.

NoSuchAlgorithmException:

on unsupported signature algorithms.

InvalidKeyException:

on incorrect key.

NoSuchProviderException:

if there's no default provider.

SignatureException:

on signature errors.

Implements abstract java.security.cert.Certificate.verify.

Doc from java.security.cert.Certificate.verify.

Verifies that this certificate was signed using the private key that corresponds to the specified public key. This method uses the signature verification engine supplied by the specified provider.

Parameters

key:PublicKey

the PublicKey used to carry out the verification.

sigProvider:String

the name of the signature provider.

Exceptions

CertificateException:

on encoding errors.

NoSuchAlgorithmException:

on unsupported signature algorithms.

InvalidKeyException:

on incorrect key.

NoSuchProviderException:

on incorrect provider.

SignatureException:

on signature errors.

Overrides java.security.cert.X509Certificate.verify.

Doc from java.security.cert.X509Certificate.verify.

Verifies that this certificate was signed using the private key that corresponds to the specified public key. This method uses the signature verification engine supplied by the specified 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:PublicKey

the PublicKey used to carry out the verification.

sigProvider:Provider

the signature provider.

Exceptions

CertificateException:

on encoding errors.

NoSuchAlgorithmException:

on unsupported signature algorithms.

InvalidKeyException:

on incorrect key.

SignatureException:

on signature errors.