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Diffstat (limited to 'libraries/spongycastle/prov/src/main/jdk1.3/org/spongycastle/jce/cert/CertPathBuilder.java')
| -rw-r--r-- | libraries/spongycastle/prov/src/main/jdk1.3/org/spongycastle/jce/cert/CertPathBuilder.java | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/jdk1.3/org/spongycastle/jce/cert/CertPathBuilder.java b/libraries/spongycastle/prov/src/main/jdk1.3/org/spongycastle/jce/cert/CertPathBuilder.java new file mode 100644 index 000000000..54585689d --- /dev/null +++ b/libraries/spongycastle/prov/src/main/jdk1.3/org/spongycastle/jce/cert/CertPathBuilder.java @@ -0,0 +1,255 @@ +package org.spongycastle.jce.cert; + +import java.security.InvalidAlgorithmParameterException; +import java.security.NoSuchAlgorithmException; +import java.security.NoSuchProviderException; +import java.security.Provider; +import java.security.Security; + +/** + * A class for building certification paths (also known as certificate chains).<br /> + * <br /> + * This class uses a provider-based architecture, as described in the Java + * Cryptography Architecture. To create a <code>CertPathBuilder</code>, call + * one of the static <code>getInstance</code> methods, passing in the + * algorithm name of the CertPathBuilder desired and optionally the name of the + * provider desired.<br /> + * <br /> + * Once a <code>CertPathBuilder</code> object has been created, certification + * paths can be constructed by calling the {@link #build build} method and + * passing it an algorithm-specific set of parameters. If successful, the result + * (including the CertPath that was built) is returned in an object that + * implements the <code>CertPathBuilderResult</code> interface.<br /> + * <br /> + * <strong>Concurrent Access</strong><br /> + * <br /> + * The static methods of this class are guaranteed to be thread-safe. Multiple + * threads may concurrently invoke the static methods defined in this class with + * no ill effects.<br /> + * <br /> + * However, this is not true for the non-static methods defined by this class. + * Unless otherwise documented by a specific provider, threads that need to + * access a single <code>CertPathBuilder</code> instance concurrently should + * synchronize amongst themselves and provide the necessary locking. Multiple + * threads each manipulating a different <code>CertPathBuilder</code> instance + * need not synchronize.<br /> + * <br /> + */ +public class CertPathBuilder extends Object +{ + private CertPathBuilderSpi builderSpi; + + private Provider provider; + + private String algorithm; + + /** + * Creates a CertPathBuilder object of the given algorithm, and encapsulates + * the given provider implementation (SPI object) in it. + * + * @param builderSpi + * the provider implementation + * @param provider + * the provider + * @param algorithm + * the algorithm name + */ + protected CertPathBuilder( + CertPathBuilderSpi builderSpi, + Provider provider, + String algorithm) + { + this.builderSpi = builderSpi; + this.provider = provider; + this.algorithm = algorithm; + } + + /** + * Returns a CertPathBuilder object that implements the specified algorithm.<br /> + * <br /> + * If the default provider package provides an implementation of the + * specified CertPathBuilder algorithm, an instance of CertPathBuilder + * containing that implementation is returned. If the requested algorithm is + * not available in the default package, other packages are searched.<br /> + * <br /> + * + * @param algorithm + * the name of the requested CertPathBuilder algorithm + * + * @return a CertPathBuilder object that implements the specified algorithm + * + * @exception NoSuchAlgorithmException + * if the requested algorithm is not available in the default + * provider package or any of the other provider packages + * that were searched + */ + public static CertPathBuilder getInstance(String algorithm) + throws NoSuchAlgorithmException + { + try + { + CertUtil.Implementation imp = CertUtil.getImplementation( + "CertPathBuilder", algorithm, (String)null); + if (imp != null) + { + return new CertPathBuilder((CertPathBuilderSpi)imp.getEngine(), + imp.getProvider(), algorithm); + } + } + catch (NoSuchProviderException ex) + { + } + throw new NoSuchAlgorithmException("can't find type " + algorithm); + } + + /** + * Returns a CertPathBuilder object that implements the specified algorithm, + * as supplied by the specified provider. + * + * @param algorithm + * the name of the requested CertPathBuilder algorithm + * @param provider + * the name of the provider + * + * @return a CertPathBuilder object that implements the specified algorithm, + * as supplied by the specified provider + * + * @exception NoSuchAlgorithmException + * if the requested algorithm is not available from the + * specified provider + * @exception NoSuchProviderException + * if the provider has not been configured + * @exception IllegalArgumentException + * if the provider is null + */ + public static CertPathBuilder getInstance(String algorithm, String provider) + throws NoSuchAlgorithmException, NoSuchProviderException + { + if (provider == null) + { + throw new IllegalArgumentException("provider must be non-null"); + } + CertUtil.Implementation imp = CertUtil.getImplementation( + "CertPathBuilder", algorithm, provider); + + if (imp != null) + { + return new CertPathBuilder((CertPathBuilderSpi)imp.getEngine(), imp + .getProvider(), algorithm); + } + throw new NoSuchAlgorithmException("can't find type " + algorithm); + } + + /** + * Returns a CertPathBuilder object that implements the specified algorithm, + * as supplied by the specified provider. Note: the provider doesn't have to + * be registered. + * + * @param algorithm + * the name of the requested CertPathBuilder algorithm + * @param provider + * the provider + * @return a CertPathBuilder object that implements the specified algorithm, + * as supplied by the specified provider + * + * @exception NoSuchAlgorithmException + * if the requested algorithm is not available from the + * specified provider + * @exception IllegalArgumentException + * if the provider is null. + */ + public static CertPathBuilder getInstance(String algorithm, + Provider provider) throws NoSuchAlgorithmException + { + if (provider == null) + { + throw new IllegalArgumentException("provider must be non-null"); + } + CertUtil.Implementation imp = CertUtil.getImplementation( + "CertPathBuilder", algorithm, provider); + + if (imp != null) + { + return new CertPathBuilder((CertPathBuilderSpi)imp.getEngine(), + provider, algorithm); + } + throw new NoSuchAlgorithmException("can't find type " + algorithm); + } + + /** + * Returns the provider of this <code>CertPathBuilder</code>. + * + * @return the provider of this <code>CertPathBuilder</code> + */ + public final Provider getProvider() + { + return provider; + } + + /** + * Returns the name of the algorithm of this <code>CertPathBuilder</code>. + * + * @return the name of the algorithm of this <code>CertPathBuilder</code> + */ + public final String getAlgorithm() + { + return algorithm; + } + + /** + * Attempts to build a certification path using the specified algorithm + * parameter set. + * + * @param params + * the algorithm parameters + * + * @return the result of the build algorithm + * + * @exception CertPathBuilderException + * if the builder is unable to construct a certification path + * that satisfies the specified parameters + * @exception InvalidAlgorithmParameterException + * if the specified parameters * are inappropriate for this + * <code>CertPathBuilder</code> + */ + public final CertPathBuilderResult build(CertPathParameters params) + throws CertPathBuilderException, InvalidAlgorithmParameterException + { + return builderSpi.engineBuild(params); + } + + /** + * Returns the default <code>CertPathBuilder</code> type as specified in + * the Java security properties file, or the string "PKIX" if no + * such property exists. The Java security properties file is located in the + * file named <JAVA_HOME>/lib/security/java.security, where + * <JAVA_HOME> refers to the directory where the SDK was installed.<br /> + * <br /> + * The default <code>CertPathBuilder</code> type can be used by + * applications that do not want to use a hard-coded type when calling one + * of the <code>getInstance</code> methods, and want to provide a default + * type in case a user does not specify its own.<br /> + * <br /> + * The default <code>CertPathBuilder</code> type can be changed by setting + * the value of the "certpathbuilder.type" security property (in the Java + * security properties file) to the desired type. + * + * @return the default <code>CertPathBuilder</code> type as specified in + * the Java security properties file, or the string "PKIX" + * if no such property exists. + */ + public static final String getDefaultType() + { + String defaulttype = null; + defaulttype = Security.getProperty("certpathbuilder.type"); + + if (defaulttype == null || defaulttype.length() <= 0) + { + return "PKIX"; + } + else + { + return defaulttype; + } + } +} |