java.security.cert

Class X509CertSelector

java.lang.Object

java.security.cert.X509CertSelector

All Implemented Interfaces:

Cloneable, CertSelector

public class X509CertSelector
extends Object
implements CertSelector

A CertSelector that selects X509Certificates that match all specified criteria. This class is particularly useful when selecting certificates from a CertStore to build a PKIX-compliant certification path.

When first constructed, an X509CertSelector has no criteria enabled and each of the get methods return a default value (null, or -1 for the getBasicConstraints method). Therefore, the match method would return true for any X509Certificate. Typically, several criteria are enabled (by calling setIssuer or setKeyUsage, for instance) and then the X509CertSelector is passed to CertStore.getCertificates or some similar method.

Several criteria can be enabled (by calling setIssuer and setSerialNumber, for example) such that the match method usually uniquely matches a single X509Certificate. We say usually, since it is possible for two issuing CAs to have the same distinguished name and each issue a certificate with the same serial number. Other unique combinations include the issuer, subject, subjectKeyIdentifier and/or the subjectPublicKey criteria.

Please refer to RFC 3280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile for definitions of the X.509 certificate extensions mentioned below.

Concurrent Access

Unless otherwise specified, the methods defined in this class are not thread-safe. Multiple threads that need to access a single object concurrently should synchronize amongst themselves and provide the necessary locking. Multiple threads each manipulating separate objects need not synchronize.

Since:

1.4

See Also:

CertSelector, X509Certificate

Constructor Summary

Constructors

Constructor and Description
X509CertSelector() Creates an X509CertSelector.

Method Summary

Methods

Modifier and Type	Method and Description
void	addPathToName(int type, byte[] name) Adds a name to the pathToNames criterion.
void	addPathToName(int type, String name) Adds a name to the pathToNames criterion.
void	addSubjectAlternativeName(int type, byte[] name) Adds a name to the subjectAlternativeNames criterion.
void	addSubjectAlternativeName(int type, String name) Adds a name to the subjectAlternativeNames criterion.
Object	clone() Returns a copy of this object.
byte[]	getAuthorityKeyIdentifier() Returns the authorityKeyIdentifier criterion.
int	getBasicConstraints() Returns the basic constraints constraint.
X509Certificate	getCertificate() Returns the certificateEquals criterion.
Date	getCertificateValid() Returns the certificateValid criterion.
Set<String>	getExtendedKeyUsage() Returns the extendedKeyUsage criterion.
X500Principal	getIssuer() Returns the issuer criterion as an X500Principal.
byte[]	getIssuerAsBytes() Returns the issuer criterion as a byte array.
String	getIssuerAsString() Denigrated, use getIssuer() or getIssuerAsBytes() instead.
boolean[]	getKeyUsage() Returns the keyUsage criterion.
boolean	getMatchAllSubjectAltNames() Indicates if the X509Certificate must contain all or at least one of the subjectAlternativeNames specified in the setSubjectAlternativeNames or addSubjectAlternativeName methods.
byte[]	getNameConstraints() Returns the name constraints criterion.
Collection<List<?>>	getPathToNames() Returns a copy of the pathToNames criterion.
Set<String>	getPolicy() Returns the policy criterion.
Date	getPrivateKeyValid() Returns the privateKeyValid criterion.
BigInteger	getSerialNumber() Returns the serialNumber criterion.
X500Principal	getSubject() Returns the subject criterion as an X500Principal.
Collection<List<?>>	getSubjectAlternativeNames() Returns a copy of the subjectAlternativeNames criterion.
byte[]	getSubjectAsBytes() Returns the subject criterion as a byte array.
String	getSubjectAsString() Denigrated, use getSubject() or getSubjectAsBytes() instead.
byte[]	getSubjectKeyIdentifier() Returns the subjectKeyIdentifier criterion.
PublicKey	getSubjectPublicKey() Returns the subjectPublicKey criterion.
String	getSubjectPublicKeyAlgID() Returns the subjectPublicKeyAlgID criterion.
boolean	match(Certificate cert) Decides whether a Certificate should be selected.
void	setAuthorityKeyIdentifier(byte[] authorityKeyID) Sets the authorityKeyIdentifier criterion.
void	setBasicConstraints(int minMaxPathLen) Sets the basic constraints constraint.
void	setCertificate(X509Certificate cert) Sets the certificateEquals criterion.
void	setCertificateValid(Date certValid) Sets the certificateValid criterion.
void	setExtendedKeyUsage(Set<String> keyPurposeSet) Sets the extendedKeyUsage criterion.
void	setIssuer(byte[] issuerDN) Sets the issuer criterion.
void	setIssuer(String issuerDN) Denigrated, use setIssuer(X500Principal) or setIssuer(byte[]) instead.
void	setIssuer(X500Principal issuer) Sets the issuer criterion.
void	setKeyUsage(boolean[] keyUsage) Sets the keyUsage criterion.
void	setMatchAllSubjectAltNames(boolean matchAllNames) Enables/disables matching all of the subjectAlternativeNames specified in the setSubjectAlternativeNames or addSubjectAlternativeName methods.
void	setNameConstraints(byte[] bytes) Sets the name constraints criterion.
void	setPathToNames(Collection<List<?>> names) Sets the pathToNames criterion.
void	setPolicy(Set<String> certPolicySet) Sets the policy constraint.
void	setPrivateKeyValid(Date privateKeyValid) Sets the privateKeyValid criterion.
void	setSerialNumber(BigInteger serial) Sets the serialNumber criterion.
void	setSubject(byte[] subjectDN) Sets the subject criterion.
void	setSubject(String subjectDN) Denigrated, use setSubject(X500Principal) or setSubject(byte[]) instead.
void	setSubject(X500Principal subject) Sets the subject criterion.
void	setSubjectAlternativeNames(Collection<List<?>> names) Sets the subjectAlternativeNames criterion.
void	setSubjectKeyIdentifier(byte[] subjectKeyID) Sets the subjectKeyIdentifier criterion.
void	setSubjectPublicKey(byte[] key) Sets the subjectPublicKey criterion.
void	setSubjectPublicKey(PublicKey key) Sets the subjectPublicKey criterion.
void	setSubjectPublicKeyAlgID(String oid) Sets the subjectPublicKeyAlgID criterion.
String	toString() Return a printable representation of the CertSelector.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

X509CertSelector

public X509CertSelector()

Creates an X509CertSelector. Initially, no criteria are set so any X509Certificate will match.

Method Detail

setCertificate

public void setCertificate(X509Certificate cert)

Sets the certificateEquals criterion. The specified X509Certificate must be equal to the X509Certificate passed to the match method. If null, then this check is not applied.

This method is particularly useful when it is necessary to match a single certificate. Although other criteria can be specified in conjunction with the certificateEquals criterion, it is usually not practical or necessary.

Parameters:

cert - the X509Certificate to match (or null)

See Also:

getCertificate()

setSerialNumber

public void setSerialNumber(BigInteger serial)

Sets the serialNumber criterion. The specified serial number must match the certificate serial number in the X509Certificate. If null, any certificate serial number will do.

Parameters:

serial - the certificate serial number to match (or null)

See Also:

getSerialNumber()

setIssuer

public void setIssuer(X500Principal issuer)

Sets the issuer criterion. The specified distinguished name must match the issuer distinguished name in the X509Certificate. If null, any issuer distinguished name will do.

Parameters:

issuer - a distinguished name as X500Principal (or null)

Since:

1.5

setIssuer

public void setIssuer(String issuerDN)
               throws IOException

Denigrated, use setIssuer(X500Principal) or setIssuer(byte[]) instead. This method should not be relied on as it can fail to match some certificates because of a loss of encoding information in the RFC 2253 String form of some distinguished names.

Sets the issuer criterion. The specified distinguished name must match the issuer distinguished name in the X509Certificate. If null, any issuer distinguished name will do.

If issuerDN is not null, it should contain a distinguished name, in RFC 2253 format.

Parameters:

issuerDN - a distinguished name in RFC 2253 format (or null)

Throws:

IOException - if a parsing error occurs (incorrect form for DN)

setIssuer

public void setIssuer(byte[] issuerDN)
               throws IOException

Sets the issuer criterion. The specified distinguished name must match the issuer distinguished name in the X509Certificate. If null is specified, the issuer criterion is disabled and any issuer distinguished name will do.

If issuerDN is not null, it should contain a single DER encoded distinguished name, as defined in X.501. The ASN.1 notation for this structure is as follows.

 Name ::= CHOICE {
   RDNSequence }

 RDNSequence ::= SEQUENCE OF RelativeDistinguishedName

 RelativeDistinguishedName ::=
   SET SIZE (1 .. MAX) OF AttributeTypeAndValue

 AttributeTypeAndValue ::= SEQUENCE {
   type     AttributeType,
   value    AttributeValue }

 AttributeType ::= OBJECT IDENTIFIER

 AttributeValue ::= ANY DEFINED BY AttributeType
 ....
 DirectoryString ::= CHOICE {
       teletexString           TeletexString (SIZE (1..MAX)),
       printableString         PrintableString (SIZE (1..MAX)),
       universalString         UniversalString (SIZE (1..MAX)),
       utf8String              UTF8String (SIZE (1.. MAX)),
       bmpString               BMPString (SIZE (1..MAX)) }
 

Note that the byte array specified here is cloned to protect against subsequent modifications.

Parameters:

issuerDN - a byte array containing the distinguished name in ASN.1 DER encoded form (or null)

Throws:

IOException - if an encoding error occurs (incorrect form for DN)

setSubject

public void setSubject(X500Principal subject)

Sets the subject criterion. The specified distinguished name must match the subject distinguished name in the X509Certificate. If null, any subject distinguished name will do.

Parameters:

subject - a distinguished name as X500Principal (or null)

Since:

1.5

setSubject

public void setSubject(String subjectDN)
                throws IOException

Denigrated, use setSubject(X500Principal) or setSubject(byte[]) instead. This method should not be relied on as it can fail to match some certificates because of a loss of encoding information in the RFC 2253 String form of some distinguished names.

Sets the subject criterion. The specified distinguished name must match the subject distinguished name in the X509Certificate. If null, any subject distinguished name will do.

If subjectDN is not null, it should contain a distinguished name, in RFC 2253 format.

Parameters:

subjectDN - a distinguished name in RFC 2253 format (or null)

Throws:

IOException - if a parsing error occurs (incorrect form for DN)

setSubject

public void setSubject(byte[] subjectDN)
                throws IOException

Sets the subject criterion. The specified distinguished name must match the subject distinguished name in the X509Certificate. If null, any subject distinguished name will do.

If subjectDN is not null, it should contain a single DER encoded distinguished name, as defined in X.501. For the ASN.1 notation for this structure, see setIssuer(byte [] issuerDN).

Parameters:

subjectDN - a byte array containing the distinguished name in ASN.1 DER format (or null)

Throws:

IOException - if an encoding error occurs (incorrect form for DN)

setSubjectKeyIdentifier

public void setSubjectKeyIdentifier(byte[] subjectKeyID)

Sets the subjectKeyIdentifier criterion. The X509Certificate must contain a SubjectKeyIdentifier extension for which the contents of the extension matches the specified criterion value. If the criterion value is null, no subjectKeyIdentifier check will be done.

If subjectKeyID is not null, it should contain a single DER encoded value corresponding to the contents of the extension value (not including the object identifier, criticality setting, and encapsulating OCTET STRING) for a SubjectKeyIdentifier extension. The ASN.1 notation for this structure follows.

 SubjectKeyIdentifier ::= KeyIdentifier

 KeyIdentifier ::= OCTET STRING
 

Since the format of subject key identifiers is not mandated by any standard, subject key identifiers are not parsed by the X509CertSelector. Instead, the values are compared using a byte-by-byte comparison.

Note that the byte array supplied here is cloned to protect against subsequent modifications.

Parameters:

subjectKeyID - the subject key identifier (or null)

See Also:

getSubjectKeyIdentifier()

setAuthorityKeyIdentifier

public void setAuthorityKeyIdentifier(byte[] authorityKeyID)

Sets the authorityKeyIdentifier criterion. The X509Certificate must contain an AuthorityKeyIdentifier extension for which the contents of the extension value matches the specified criterion value. If the criterion value is null, no authorityKeyIdentifier check will be done.

If authorityKeyID is not null, it should contain a single DER encoded value corresponding to the contents of the extension value (not including the object identifier, criticality setting, and encapsulating OCTET STRING) for an AuthorityKeyIdentifier extension. The ASN.1 notation for this structure follows.

 AuthorityKeyIdentifier ::= SEQUENCE {
    keyIdentifier             [0] KeyIdentifier           OPTIONAL,
    authorityCertIssuer       [1] GeneralNames            OPTIONAL,
    authorityCertSerialNumber [2] CertificateSerialNumber OPTIONAL  }

 KeyIdentifier ::= OCTET STRING
 

Authority key identifiers are not parsed by the X509CertSelector. Instead, the values are compared using a byte-by-byte comparison.

When the keyIdentifier field of AuthorityKeyIdentifier is populated, the value is usually taken from the SubjectKeyIdentifier extension in the issuer's certificate. Note, however, that the result of X509Certificate.getExtensionValue(<SubjectKeyIdentifier Object Identifier>) on the issuer's certificate may NOT be used directly as the input to setAuthorityKeyIdentifier. This is because the SubjectKeyIdentifier contains only a KeyIdentifier OCTET STRING, and not a SEQUENCE of KeyIdentifier, GeneralNames, and CertificateSerialNumber. In order to use the extension value of the issuer certificate's SubjectKeyIdentifier extension, it will be necessary to extract the value of the embedded KeyIdentifier OCTET STRING, then DER encode this OCTET STRING inside a SEQUENCE. For more details on SubjectKeyIdentifier, see setSubjectKeyIdentifier(byte[] subjectKeyID).

Note also that the byte array supplied here is cloned to protect against subsequent modifications.

Parameters:

authorityKeyID - the authority key identifier (or null)

See Also:

getAuthorityKeyIdentifier()

setCertificateValid

public void setCertificateValid(Date certValid)

Sets the certificateValid criterion. The specified date must fall within the certificate validity period for the X509Certificate. If null, no certificateValid check will be done.

Note that the Date supplied here is cloned to protect against subsequent modifications.

Parameters:

certValid - the Date to check (or null)

See Also:

getCertificateValid()

setPrivateKeyValid

public void setPrivateKeyValid(Date privateKeyValid)

Sets the privateKeyValid criterion. The specified date must fall within the private key validity period for the X509Certificate. If null, no privateKeyValid check will be done.

Note that the Date supplied here is cloned to protect against subsequent modifications.

Parameters:

privateKeyValid - the Date to check (or null)

See Also:

getPrivateKeyValid()

setSubjectPublicKeyAlgID

public void setSubjectPublicKeyAlgID(String oid)
                              throws IOException

Sets the subjectPublicKeyAlgID criterion. The X509Certificate must contain a subject public key with the specified algorithm. If null, no subjectPublicKeyAlgID check will be done.

Parameters:

oid - The object identifier (OID) of the algorithm to check for (or null). An OID is represented by a set of nonnegative integers separated by periods.

Throws:

IOException - if the OID is invalid, such as the first component being not 0, 1 or 2 or the second component being greater than 39.

See Also:

getSubjectPublicKeyAlgID()

setSubjectPublicKey

public void setSubjectPublicKey(PublicKey key)

Sets the subjectPublicKey criterion. The X509Certificate must contain the specified subject public key. If null, no subjectPublicKey check will be done.

Parameters:

key - the subject public key to check for (or null)

See Also:

getSubjectPublicKey()

setSubjectPublicKey

public void setSubjectPublicKey(byte[] key)
                         throws IOException

Sets the subjectPublicKey criterion. The X509Certificate must contain the specified subject public key. If null, no subjectPublicKey check will be done.

Because this method allows the public key to be specified as a byte array, it may be used for unknown key types.

If key is not null, it should contain a single DER encoded SubjectPublicKeyInfo structure, as defined in X.509. The ASN.1 notation for this structure is as follows.

 SubjectPublicKeyInfo  ::=  SEQUENCE  {
   algorithm            AlgorithmIdentifier,
   subjectPublicKey     BIT STRING  }

 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
 

Note that the byte array supplied here is cloned to protect against subsequent modifications.

Parameters:

key - a byte array containing the subject public key in ASN.1 DER form (or null)

Throws:

IOException - if an encoding error occurs (incorrect form for subject public key)

See Also:

getSubjectPublicKey()

setKeyUsage

public void setKeyUsage(boolean[] keyUsage)

Sets the keyUsage criterion. The X509Certificate must allow the specified keyUsage values. If null, no keyUsage check will be done. Note that an X509Certificate that has no keyUsage extension implicitly allows all keyUsage values.

Note that the boolean array supplied here is cloned to protect against subsequent modifications.

Parameters:

keyUsage - a boolean array in the same format as the boolean array returned by X509Certificate.getKeyUsage(). Or null.

See Also:

getKeyUsage()

setExtendedKeyUsage

public void setExtendedKeyUsage(Set<String> keyPurposeSet)
                         throws IOException

Sets the extendedKeyUsage criterion. The X509Certificate must allow the specified key purposes in its extended key usage extension. If keyPurposeSet is empty or null, no extendedKeyUsage check will be done. Note that an X509Certificate that has no extendedKeyUsage extension implicitly allows all key purposes.

Note that the Set is cloned to protect against subsequent modifications.

Parameters:

keyPurposeSet - a Set of key purpose OIDs in string format (or null). Each OID is represented by a set of nonnegative integers separated by periods.

Throws:

IOException - if the OID is invalid, such as the first component being not 0, 1 or 2 or the second component being greater than 39.

See Also:

getExtendedKeyUsage()

setMatchAllSubjectAltNames

public void setMatchAllSubjectAltNames(boolean matchAllNames)

Enables/disables matching all of the subjectAlternativeNames specified in the setSubjectAlternativeNames or addSubjectAlternativeName methods. If enabled, the X509Certificate must contain all of the specified subject alternative names. If disabled, the X509Certificate must contain at least one of the specified subject alternative names.

The matchAllNames flag is true by default.

Parameters:

matchAllNames - if true, the flag is enabled; if false, the flag is disabled.

See Also:

getMatchAllSubjectAltNames()

setSubjectAlternativeNames

public void setSubjectAlternativeNames(Collection<List<?>> names)
                                throws IOException

Sets the subjectAlternativeNames criterion. The X509Certificate must contain all or at least one of the specified subjectAlternativeNames, depending on the value of the matchAllNames flag (see setMatchAllSubjectAltNames).

This method allows the caller to specify, with a single method call, the complete set of subject alternative names for the subjectAlternativeNames criterion. The specified value replaces the previous value for the subjectAlternativeNames criterion.

The names parameter (if not null) is a Collection with one entry for each name to be included in the subject alternative name criterion. 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). There can be multiple names of the same type. If null is supplied as the value for this argument, no subjectAlternativeNames check will be performed.

Each subject alternative name in the Collection may be specified either as a String or as an ASN.1 encoded byte array. For more details about the formats used, see addSubjectAlternativeName(int type, String name) and addSubjectAlternativeName(int type, byte [] name).

Note: for distinguished names, specify the byte array form instead of the String form. See the note in addSubjectAlternativeName(int, String) for more information.

Note that the names parameter can contain duplicate names (same name and name type), but they may be removed from the Collection of names returned by the getSubjectAlternativeNames method.

Note that a deep copy is performed on the Collection to protect against subsequent modifications.

Parameters:

names - a Collection of names (or null)

Throws:

IOException - if a parsing error occurs

See Also:

getSubjectAlternativeNames()

addSubjectAlternativeName

public void addSubjectAlternativeName(int type,
                             String name)
                               throws IOException

Adds a name to the subjectAlternativeNames criterion. The X509Certificate must contain all or at least one of the specified subjectAlternativeNames, depending on the value of the matchAllNames flag (see setMatchAllSubjectAltNames).

This method allows the caller to add a name to the set of subject alternative names. The specified name is added to any previous value for the subjectAlternativeNames criterion. If the specified name is a duplicate, it may be ignored.

The name is provided in string format. RFC 822, DNS, and URI names use the well-established string formats for those types (subject to the restrictions included in RFC 3280). IPv4 address names are supplied using dotted quad notation. OID address names are represented as a series of nonnegative integers separated by periods. And directory names (distinguished names) are supplied in RFC 2253 format. No standard string format is defined for otherNames, X.400 names, EDI party names, IPv6 address names, or any other type of names. They should be specified using the addSubjectAlternativeName(int type, byte [] name) method.

Note: for distinguished names, use addSubjectAlternativeName(int, byte[]) instead. This method should not be relied on as it can fail to match some certificates because of a loss of encoding information in the RFC 2253 String form of some distinguished names.

Parameters:

type - the name type (0-8, as specified in RFC 3280, section 4.2.1.7)

name - the name in string form (not null)

Throws:

IOException - if a parsing error occurs

addSubjectAlternativeName

public void addSubjectAlternativeName(int type,
                             byte[] name)
                               throws IOException

Adds a name to the subjectAlternativeNames criterion. The X509Certificate must contain all or at least one of the specified subjectAlternativeNames, depending on the value of the matchAllNames flag (see setMatchAllSubjectAltNames).

This method allows the caller to add a name to the set of subject alternative names. The specified name is added to any previous value for the subjectAlternativeNames criterion. If the specified name is a duplicate, it may be ignored.

The name is provided as a byte array. This byte array should contain the DER encoded name, as it would appear in the GeneralName structure defined in RFC 3280 and X.509. The encoded byte array should only contain the encoded value of the name, and should not include the tag associated with the name in the GeneralName structure. The ASN.1 definition of this structure appears below.

  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}
 

Note that the byte array supplied here is cloned to protect against subsequent modifications.

Parameters:

type - the name type (0-8, as listed above)

name - a byte array containing the name in ASN.1 DER encoded form

Throws:

IOException - if a parsing error occurs

setNameConstraints

public void setNameConstraints(byte[] bytes)
                        throws IOException

Sets the name constraints criterion. The X509Certificate must have subject and subject alternative names that meet the specified name constraints.

The name constraints are specified as a byte array. This byte array should contain the DER encoded form of the name constraints, as they would appear in the NameConstraints structure defined in RFC 3280 and X.509. The ASN.1 definition of this structure appears below.

  NameConstraints ::= SEQUENCE {
       permittedSubtrees       [0]     GeneralSubtrees OPTIONAL,
       excludedSubtrees        [1]     GeneralSubtrees OPTIONAL }

  GeneralSubtrees ::= SEQUENCE SIZE (1..MAX) OF GeneralSubtree

  GeneralSubtree ::= SEQUENCE {
       base                    GeneralName,
       minimum         [0]     BaseDistance DEFAULT 0,
       maximum         [1]     BaseDistance OPTIONAL }

  BaseDistance ::= INTEGER (0..MAX)

  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}
 

Note that the byte array supplied here is cloned to protect against subsequent modifications.

Parameters:

bytes - a byte array containing the ASN.1 DER encoding of a NameConstraints extension to be used for checking name constraints. Only the value of the extension is included, not the OID or criticality flag. Can be null, in which case no name constraints check will be performed.

Throws:

IOException - if a parsing error occurs

See Also:

getNameConstraints()

setBasicConstraints

public void setBasicConstraints(int minMaxPathLen)

Sets the basic constraints constraint. If the value is greater than or equal to zero, X509Certificates must include a basicConstraints extension with a pathLen of at least this value. If the value is -2, only end-entity certificates are accepted. If the value is -1, no check is done.

This constraint is useful when building a certification path forward (from the target toward the trust anchor. If a partial path has been built, any candidate certificate must have a maxPathLen value greater than or equal to the number of certificates in the partial path.

Parameters:

minMaxPathLen - the value for the basic constraints constraint

Throws:

IllegalArgumentException - if the value is less than -2

See Also:

getBasicConstraints()

setPolicy

public void setPolicy(Set<String> certPolicySet)
               throws IOException

Sets the policy constraint. The X509Certificate must include at least one of the specified policies in its certificate policies extension. If certPolicySet is empty, then the X509Certificate must include at least some specified policy in its certificate policies extension. If certPolicySet is null, no policy check will be performed.

Note that the Set is cloned to protect against subsequent modifications.

Parameters:

certPolicySet - a Set of certificate policy OIDs in string format (or null). Each OID is represented by a set of nonnegative integers separated by periods.

Throws:

IOException - if a parsing error occurs on the OID such as the first component is not 0, 1 or 2 or the second component is greater than 39.

See Also:

getPolicy()

setPathToNames

public void setPathToNames(Collection<List<?>> names)
                    throws IOException

Sets the pathToNames criterion. The X509Certificate must not include name constraints that would prohibit building a path to the specified names.

This method allows the caller to specify, with a single method call, the complete set of names which the X509Certificates's name constraints must permit. The specified value replaces the previous value for the pathToNames criterion.

This constraint is useful when building a certification path forward (from the target toward the trust anchor. If a partial path has been built, any candidate certificate must not include name constraints that would prohibit building a path to any of the names in the partial path.

The names parameter (if not null) is a Collection with one entry for each name to be included in the pathToNames criterion. 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). There can be multiple names of the same type. If null is supplied as the value for this argument, no pathToNames check will be performed.

Each name in the Collection may be specified either as a String or as an ASN.1 encoded byte array. For more details about the formats used, see addPathToName(int type, String name) and addPathToName(int type, byte [] name).

Note: for distinguished names, specify the byte array form instead of the String form. See the note in addPathToName(int, String) for more information.

Note that the names parameter can contain duplicate names (same name and name type), but they may be removed from the Collection of names returned by the getPathToNames method.

Note that a deep copy is performed on the Collection to protect against subsequent modifications.

Parameters:

names - a Collection with one entry per name (or null)

Throws:

IOException - if a parsing error occurs

See Also:

getPathToNames()

addPathToName

public void addPathToName(int type,
                 String name)
                   throws IOException

Adds a name to the pathToNames criterion. The X509Certificate must not include name constraints that would prohibit building a path to the specified name.

This method allows the caller to add a name to the set of names which the X509Certificates's name constraints must permit. The specified name is added to any previous value for the pathToNames criterion. If the name is a duplicate, it may be ignored.

The name is provided in string format. RFC 822, DNS, and URI names use the well-established string formats for those types (subject to the restrictions included in RFC 3280). IPv4 address names are supplied using dotted quad notation. OID address names are represented as a series of nonnegative integers separated by periods. And directory names (distinguished names) are supplied in RFC 2253 format. No standard string format is defined for otherNames, X.400 names, EDI party names, IPv6 address names, or any other type of names. They should be specified using the addPathToName(int type, byte [] name) method.

Note: for distinguished names, use addPathToName(int, byte[]) instead. This method should not be relied on as it can fail to match some certificates because of a loss of encoding information in the RFC 2253 String form of some distinguished names.

Parameters:

type - the name type (0-8, as specified in RFC 3280, section 4.2.1.7)

name - the name in string form

Throws:

IOException - if a parsing error occurs

addPathToName

public void addPathToName(int type,
                 byte[] name)
                   throws IOException

Adds a name to the pathToNames criterion. The X509Certificate must not include name constraints that would prohibit building a path to the specified name.

This method allows the caller to add a name to the set of names which the X509Certificates's name constraints must permit. The specified name is added to any previous value for the pathToNames criterion. If the name is a duplicate, it may be ignored.

The name is provided as a byte array. This byte array should contain the DER encoded name, as it would appear in the GeneralName structure defined in RFC 3280 and X.509. The ASN.1 definition of this structure appears in the documentation for addSubjectAlternativeName(int type, byte [] name).

Note that the byte array supplied here is cloned to protect against subsequent modifications.

Parameters:

type - the name type (0-8, as specified in RFC 3280, section 4.2.1.7)

name - a byte array containing the name in ASN.1 DER encoded form

Throws:

IOException - if a parsing error occurs

getCertificate

public X509Certificate getCertificate()

Returns the certificateEquals criterion. The specified X509Certificate must be equal to the X509Certificate passed to the match method. If null, this check is not applied.

Returns:

the X509Certificate to match (or null)

See Also:

setCertificate(java.security.cert.X509Certificate)

getSerialNumber

public BigInteger getSerialNumber()

Returns the serialNumber criterion. The specified serial number must match the certificate serial number in the X509Certificate. If null, any certificate serial number will do.

Returns:

the certificate serial number to match (or null)

See Also:

setSerialNumber(java.math.BigInteger)

getIssuer

public X500Principal getIssuer()

Returns the issuer criterion as an X500Principal. This distinguished name must match the issuer distinguished name in the X509Certificate. If null, the issuer criterion is disabled and any issuer distinguished name will do.

Returns:

the required issuer distinguished name as X500Principal (or null)

Since:

1.5

getIssuerAsString

public String getIssuerAsString()

Denigrated, use getIssuer() or getIssuerAsBytes() instead. This method should not be relied on as it can fail to match some certificates because of a loss of encoding information in the RFC 2253 String form of some distinguished names.

Returns the issuer criterion as a String. This distinguished name must match the issuer distinguished name in the X509Certificate. If null, the issuer criterion is disabled and any issuer distinguished name will do.

If the value returned is not null, it is a distinguished name, in RFC 2253 format.

Returns:

the required issuer distinguished name in RFC 2253 format (or null)

getIssuerAsBytes

public byte[] getIssuerAsBytes()
                        throws IOException

Returns the issuer criterion as a byte array. This distinguished name must match the issuer distinguished name in the X509Certificate. If null, the issuer criterion is disabled and any issuer distinguished name will do.

If the value returned is not null, it is a byte array containing a single DER encoded distinguished name, as defined in X.501. The ASN.1 notation for this structure is supplied in the documentation for setIssuer(byte [] issuerDN).

Note that the byte array returned is cloned to protect against subsequent modifications.

Returns:

a byte array containing the required issuer distinguished name in ASN.1 DER format (or null)

Throws:

IOException - if an encoding error occurs

getSubject

public X500Principal getSubject()

Returns the subject criterion as an X500Principal. This distinguished name must match the subject distinguished name in the X509Certificate. If null, the subject criterion is disabled and any subject distinguished name will do.

Returns:

the required subject distinguished name as X500Principal (or null)

Since:

1.5

getSubjectAsString

public String getSubjectAsString()

Denigrated, use getSubject() or getSubjectAsBytes() instead. This method should not be relied on as it can fail to match some certificates because of a loss of encoding information in the RFC 2253 String form of some distinguished names.

Returns the subject criterion as a String. This distinguished name must match the subject distinguished name in the X509Certificate. If null, the subject criterion is disabled and any subject distinguished name will do.

If the value returned is not null, it is a distinguished name, in RFC 2253 format.

Returns:

the required subject distinguished name in RFC 2253 format (or null)

getSubjectAsBytes

public byte[] getSubjectAsBytes()
                         throws IOException

Returns the subject criterion as a byte array. This distinguished name must match the subject distinguished name in the X509Certificate. If null, the subject criterion is disabled and any subject distinguished name will do.

If the value returned is not null, it is a byte array containing a single DER encoded distinguished name, as defined in X.501. The ASN.1 notation for this structure is supplied in the documentation for setSubject(byte [] subjectDN).

Note that the byte array returned is cloned to protect against subsequent modifications.

Returns:

a byte array containing the required subject distinguished name in ASN.1 DER format (or null)

Throws:

IOException - if an encoding error occurs

getSubjectKeyIdentifier

public byte[] getSubjectKeyIdentifier()

Returns the subjectKeyIdentifier criterion. The X509Certificate must contain a SubjectKeyIdentifier extension with the specified value. If null, no subjectKeyIdentifier check will be done.

Note that the byte array returned is cloned to protect against subsequent modifications.

Returns:

the key identifier (or null)

See Also:

setSubjectKeyIdentifier(byte[])

getAuthorityKeyIdentifier

public byte[] getAuthorityKeyIdentifier()

Returns the authorityKeyIdentifier criterion. The X509Certificate must contain a AuthorityKeyIdentifier extension with the specified value. If null, no authorityKeyIdentifier check will be done.

Note that the byte array returned is cloned to protect against subsequent modifications.

Returns:

the key identifier (or null)

See Also:

setAuthorityKeyIdentifier(byte[])

getCertificateValid

public Date getCertificateValid()

Returns the certificateValid criterion. The specified date must fall within the certificate validity period for the X509Certificate. If null, no certificateValid check will be done.

Note that the Date returned is cloned to protect against subsequent modifications.

Returns:

the Date to check (or null)

See Also:

setCertificateValid(java.util.Date)

getPrivateKeyValid

public Date getPrivateKeyValid()

Returns the privateKeyValid criterion. The specified date must fall within the private key validity period for the X509Certificate. If null, no privateKeyValid check will be done.

Note that the Date returned is cloned to protect against subsequent modifications.

Returns:

the Date to check (or null)

See Also:

setPrivateKeyValid(java.util.Date)

getSubjectPublicKeyAlgID

public String getSubjectPublicKeyAlgID()

Returns the subjectPublicKeyAlgID criterion. The X509Certificate must contain a subject public key with the specified algorithm. If null, no subjectPublicKeyAlgID check will be done.

Returns:

the object identifier (OID) of the signature algorithm to check for (or null). An OID is represented by a set of nonnegative integers separated by periods.

See Also:

setSubjectPublicKeyAlgID(java.lang.String)

getSubjectPublicKey

public PublicKey getSubjectPublicKey()

Returns the subjectPublicKey criterion. The X509Certificate must contain the specified subject public key. If null, no subjectPublicKey check will be done.

Returns:

the subject public key to check for (or null)

See Also:

setSubjectPublicKey(java.security.PublicKey)

getKeyUsage

public boolean[] getKeyUsage()

Returns the keyUsage criterion. The X509Certificate must allow the specified keyUsage values. If null, no keyUsage check will be done.

Note that the boolean array returned is cloned to protect against subsequent modifications.

Returns:

a boolean array in the same format as the boolean array returned by X509Certificate.getKeyUsage(). Or null.

See Also:

setKeyUsage(boolean[])

getExtendedKeyUsage

public Set<String> getExtendedKeyUsage()

Returns the extendedKeyUsage criterion. The X509Certificate must allow the specified key purposes in its extended key usage extension. If the keyPurposeSet returned is empty or null, no extendedKeyUsage check will be done. Note that an X509Certificate that has no extendedKeyUsage extension implicitly allows all key purposes.

Returns:

an immutable Set of key purpose OIDs in string format (or null)

See Also:

setExtendedKeyUsage(java.util.Set<java.lang.String>)

getMatchAllSubjectAltNames

public boolean getMatchAllSubjectAltNames()

Indicates if the X509Certificate must contain all or at least one of the subjectAlternativeNames specified in the setSubjectAlternativeNames or addSubjectAlternativeName methods. If true, the X509Certificate must contain all of the specified subject alternative names. If false, the X509Certificate must contain at least one of the specified subject alternative names.

Returns:

true if the flag is enabled; false if the flag is disabled. The flag is true by default.

See Also:

setMatchAllSubjectAltNames(boolean)

getSubjectAlternativeNames

public Collection<List<?>> getSubjectAlternativeNames()

Returns a copy of the subjectAlternativeNames criterion. The X509Certificate must contain all or at least one of the specified subjectAlternativeNames, depending on the value of the matchAllNames flag (see getMatchAllSubjectAltNames). If the value returned is null, no subjectAlternativeNames check will be performed.

If the value returned is not null, it is a Collection with one entry for each name to be included in the subject alternative name criterion. 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). There can be multiple names of the same type. Note that the Collection returned may contain duplicate names (same name and name type).

Each subject alternative name in the Collection may be specified either as a String or as an ASN.1 encoded byte array. For more details about the formats used, see addSubjectAlternativeName(int type, String name) and addSubjectAlternativeName(int type, byte [] name).

Note that a deep copy is performed on the Collection to protect against subsequent modifications.

Returns:

a Collection of names (or null)

See Also:

setSubjectAlternativeNames(java.util.Collection<java.util.List<?>>)

getNameConstraints

public byte[] getNameConstraints()

Returns the name constraints criterion. The X509Certificate must have subject and subject alternative names that meet the specified name constraints.

The name constraints are returned as a byte array. This byte array contains the DER encoded form of the name constraints, as they would appear in the NameConstraints structure defined in RFC 3280 and X.509. The ASN.1 notation for this structure is supplied in the documentation for setNameConstraints(byte [] bytes).

Note that the byte array returned is cloned to protect against subsequent modifications.

Returns:

a byte array containing the ASN.1 DER encoding of a NameConstraints extension used for checking name constraints. null if no name constraints check will be performed.

See Also:

setNameConstraints(byte[])

getBasicConstraints

public int getBasicConstraints()

Returns the basic constraints constraint. If the value is greater than or equal to zero, the X509Certificates must include a basicConstraints extension with a pathLen of at least this value. If the value is -2, only end-entity certificates are accepted. If the value is -1, no basicConstraints check is done.

Returns:

the value for the basic constraints constraint

See Also:

setBasicConstraints(int)

getPolicy

public Set<String> getPolicy()

Returns the policy criterion. The X509Certificate must include at least one of the specified policies in its certificate policies extension. If the Set returned is empty, then the X509Certificate must include at least some specified policy in its certificate policies extension. If the Set returned is null, no policy check will be performed.

Returns:

an immutable Set of certificate policy OIDs in string format (or null)

See Also:

setPolicy(java.util.Set<java.lang.String>)

getPathToNames

public Collection<List<?>> getPathToNames()

Returns a copy of the pathToNames criterion. The X509Certificate must not include name constraints that would prohibit building a path to the specified names. If the value returned is null, no pathToNames check will be performed.

If the value returned is not null, it is a Collection with one entry for each name to be included in the pathToNames criterion. 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). There can be multiple names of the same type. Note that the Collection returned may contain duplicate names (same name and name type).

Each name in the Collection may be specified either as a String or as an ASN.1 encoded byte array. For more details about the formats used, see addPathToName(int type, String name) and addPathToName(int type, byte [] name).

Note that a deep copy is performed on the Collection to protect against subsequent modifications.

Returns:

a Collection of names (or null)

See Also:

setPathToNames(java.util.Collection<java.util.List<?>>)

toString

public String toString()

Return a printable representation of the CertSelector.

Overrides:

toString in class Object

Returns:

a String describing the contents of the CertSelector

match

public boolean match(Certificate cert)

Decides whether a Certificate should be selected.

Specified by:

match in interface CertSelector

Parameters:

cert - the Certificate to be checked

Returns:

true if the Certificate should be selected, false otherwise

clone

public Object clone()

Returns a copy of this object.

Specified by:

clone in interface CertSelector

Overrides:

clone in class Object

Returns:

the copy

See Also:

Cloneable