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Diffstat (limited to 'libraries/spongycastle/core/src/main/jdk1.1/java/security/cert/PKIXBuilderParameters.java')
| -rw-r--r-- | libraries/spongycastle/core/src/main/jdk1.1/java/security/cert/PKIXBuilderParameters.java | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/jdk1.1/java/security/cert/PKIXBuilderParameters.java b/libraries/spongycastle/core/src/main/jdk1.1/java/security/cert/PKIXBuilderParameters.java new file mode 100644 index 000000000..b4f7aceb9 --- /dev/null +++ b/libraries/spongycastle/core/src/main/jdk1.1/java/security/cert/PKIXBuilderParameters.java @@ -0,0 +1,179 @@ +package java.security.cert; + +import java.security.InvalidAlgorithmParameterException; +import java.security.InvalidParameterException; +import java.security.KeyStore; +import java.security.KeyStoreException; +import java.util.Set; + +/** + * Parameters used as input for the PKIX <code>CertPathBuilder</code> + * algorithm.<br /> + * <br /> + * A PKIX <code>CertPathBuilder</code> uses these parameters to {@link + * CertPathBuilder#build build} a <code>CertPath</code> which has been + * validated according to the PKIX certification path validation algorithm.<br /> + * <br /> + * To instantiate a <code>PKIXBuilderParameters</code> object, an + * application must specify one or more <i>most-trusted CAs</i> as defined by + * the PKIX certification path validation algorithm. The most-trusted CA + * can be specified using one of two constructors. An application + * can call {@link #PKIXBuilderParameters(Set, CertSelector) + * PKIXBuilderParameters(Set, CertSelector)}, specifying a + * <code>Set</code> of <code>TrustAnchor</code> objects, each of which + * identifies a most-trusted CA. Alternatively, an application can call + * {@link #PKIXBuilderParameters(KeyStore, CertSelector) + * PKIXBuilderParameters(KeyStore, CertSelector)}, specifying a + * <code>KeyStore</code> instance containing trusted certificate entries, each + * of which will be considered as a most-trusted CA.<br /> + * <br /> + * In addition, an application must specify constraints on the target + * certificate that the <code>CertPathBuilder</code> will attempt + * to build a path to. The constraints are specified as a + * <code>CertSelector</code> object. These constraints should provide the + * <code>CertPathBuilder</code> with enough search criteria to find the target + * certificate. Minimal criteria for an <code>X509Certificate</code> usually + * include the subject name and/or one or more subject alternative names. + * If enough criteria is not specified, the <code>CertPathBuilder</code> + * may throw a <code>CertPathBuilderException</code>.<br /> + * <br /> + * <b>Concurrent Access</b><br /> + * <br /> + * 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. + * + * @see CertPathBuilder + **/ +public class PKIXBuilderParameters extends PKIXParameters +{ + private int maxPathLength = 5; + + /** + * Creates an instance of <code>PKIXBuilderParameters</code> with + * the specified <code>Set</code> of most-trusted CAs. + * Each element of the set is a {@link TrustAnchor TrustAnchor}.<br /> + * <br /> + * Note that the <code>Set</code> is copied to protect against + * subsequent modifications. + * + * @param trustAnchors a <code>Set</code> of <code>TrustAnchor</code>s + * @param targetConstraints a <code>CertSelector</code> specifying the + * constraints on the target certificate + * + * @exception InvalidAlgorithmParameterException if <code>trustAnchors</code> + * is empty <code>(trustAnchors.isEmpty() == true)</code> + * @exception NullPointerException if <code>trustAnchors</code> is + * <code>null</code> + * @exception ClassCastException if any of the elements of + * <code>trustAnchors</code> are not of type + * <code>java.security.cert.TrustAnchor</code> + */ + public PKIXBuilderParameters( + Set trustAnchors, + CertSelector targetConstraints) + throws InvalidAlgorithmParameterException + { + super( trustAnchors ); + setTargetCertConstraints( targetConstraints ); + } + + /** + * Creates an instance of <code>PKIXBuilderParameters</code> that + * populates the set of most-trusted CAs from the trusted + * certificate entries contained in the specified <code>KeyStore</code>. + * Only keystore entries that contain trusted <code>X509Certificate</code>s + * are considered; all other certificate types are ignored. + * + * @param keystore a <code>KeyStore</code> from which the set of + * most-trusted CAs will be populated + * @param targetConstraints a <code>CertSelector</code> specifying the + * constraints on the target certificate + * + * @exception KeyStoreException if <code>keystore</code> has not been + * initialized + * @exception InvalidAlgorithmParameterException if <code>keystore</code> does + * not contain at least one trusted certificate entry + * @exception NullPointerException if <code>keystore</code> is + * <code>null</code> + */ + public PKIXBuilderParameters(KeyStore keystore, + CertSelector targetConstraints) + throws KeyStoreException, + InvalidAlgorithmParameterException + { + super( keystore ); + setTargetCertConstraints( targetConstraints ); + } + + /** + * Sets the value of the maximum number of non-self-issued intermediate + * certificates that may exist in a certification path. A certificate + * is self-issued if the DNs that appear in the subject and issuer + * fields are identical and are not empty. Note that the last certificate + * in a certification path is not an intermediate certificate, and is not + * included in this limit. Usually the last certificate is an end entity + * certificate, but it can be a CA certificate. A PKIX + * <code>CertPathBuilder</code> instance must not build + * paths longer than the length specified.<br /> + * <br /> + * A value of 0 implies that the path can only contain + * a single certificate. A value of -1 implies that the + * path length is unconstrained (i.e. there is no maximum). + * The default maximum path length, if not specified, is 5. + * Setting a value less than -1 will cause an exception to be thrown.<br /> + * <br /> + * If any of the CA certificates contain the + * <code>BasicConstraintsExtension</code>, the value of the + * <code>pathLenConstraint</code> field of the extension overrides + * the maximum path length parameter whenever the result is a + * certification path of smaller length. + * + * @param maxPathLength the maximum number of non-self-issued intermediate + * certificates that may exist in a certification path + * + * @exception InvalidParameterException if <code>maxPathLength</code> is set + * to a value less than -1 + * + * @see #getMaxPathLength + */ + public void setMaxPathLength(int maxPathLength) + { + if ( maxPathLength < -1 ) + throw new InvalidParameterException("the maximum path length parameter can not be less than -1"); + this.maxPathLength = maxPathLength; + } + + /** + * Returns the value of the maximum number of intermediate non-self-issued + * certificates that may exist in a certification path. See + * the {@link #setMaxPathLength} method for more details. + * + * @return the maximum number of non-self-issued intermediate certificates + * that may exist in a certification path, or -1 if there is no limit + * + * @see #setMaxPathLength + */ + public int getMaxPathLength() + { + return maxPathLength; + } + + /** + * Returns a formatted string describing the parameters. + * + * @return a formatted string describing the parameters + */ + public String toString() + { + StringBuffer s = new StringBuffer(); + s.append( "PKIXBuilderParameters [\n" ); + s.append( super.toString() ); + s.append( " Maximum Path Length: " ); + s.append( getMaxPathLength() ); + s.append( "\n]\n" ); + return s.toString(); + } +} |