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/*
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
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*
*/
package java.security;
import java.io.*;
import java.net.URI;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.security.cert.CertificateException;
import java.security.spec.AlgorithmParameterSpec;
import java.util.*;
import javax.crypto.SecretKey;
import javax.security.auth.DestroyFailedException;
import javax.security.auth.callback.*;
/**
* This class represents a storage facility for cryptographic
* keys and certificates.
*
* <p> A {@code KeyStore} manages different types of entries.
* Each type of entry implements the {@code KeyStore.Entry} interface.
* Three basic {@code KeyStore.Entry} implementations are provided:
*
* <ul>
* <li><b>KeyStore.PrivateKeyEntry</b>
* <p> This type of entry holds a cryptographic {@code PrivateKey},
* which is optionally stored in a protected format to prevent
* unauthorized access. It is also accompanied by a certificate chain
* for the corresponding public key.
*
* <p> Private keys and certificate chains are used by a given entity for
* self-authentication. Applications for this authentication include software
* distribution organizations which sign JAR files as part of releasing
* and/or licensing software.
*
* <li><b>KeyStore.SecretKeyEntry</b>
* <p> This type of entry holds a cryptographic {@code SecretKey},
* which is optionally stored in a protected format to prevent
* unauthorized access.
*
* <li><b>KeyStore.TrustedCertificateEntry</b>
* <p> This type of entry contains a single public key {@code Certificate}
* belonging to another party. It is called a <i>trusted certificate</i>
* because the keystore owner trusts that the public key in the certificate
* indeed belongs to the identity identified by the <i>subject</i> (owner)
* of the certificate.
*
* <p>This type of entry can be used to authenticate other parties.
* </ul>
*
* <p> Each entry in a keystore is identified by an "alias" string. In the
* case of private keys and their associated certificate chains, these strings
* distinguish among the different ways in which the entity may authenticate
* itself. For example, the entity may authenticate itself using different
* certificate authorities, or using different public key algorithms.
*
* <p> Whether aliases are case sensitive is implementation dependent. In order
* to avoid problems, it is recommended not to use aliases in a KeyStore that
* only differ in case.
*
* <p> Whether keystores are persistent, and the mechanisms used by the
* keystore if it is persistent, are not specified here. This allows
* use of a variety of techniques for protecting sensitive (e.g., private or
* secret) keys. Smart cards or other integrated cryptographic engines
* (SafeKeyper) are one option, and simpler mechanisms such as files may also
* be used (in a variety of formats).
*
* <p> Typical ways to request a KeyStore object include
* relying on the default type and providing a specific keystore type.
*
* <ul>
* <li>To rely on the default type:
* <pre>
* KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
* </pre>
* The system will return a keystore implementation for the default type.
*
* <li>To provide a specific keystore type:
* <pre>
* KeyStore ks = KeyStore.getInstance("JKS");
* </pre>
* The system will return the most preferred implementation of the
* specified keystore type available in the environment. <p>
* </ul>
*
* <p> Before a keystore can be accessed, it must be
* {@link #load(java.io.InputStream, char[]) loaded}.
* <pre>
* KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
*
* // get user password and file input stream
* char[] password = getPassword();
*
* try (FileInputStream fis = new FileInputStream("keyStoreName")) {
* ks.load(fis, password);
* }
* </pre>
*
* To create an empty keystore using the above {@code load} method,
* pass {@code null} as the {@code InputStream} argument.
*
* <p> Once the keystore has been loaded, it is possible
* to read existing entries from the keystore, or to write new entries
* into the keystore:
* <pre>
* KeyStore.ProtectionParameter protParam =
* new KeyStore.PasswordProtection(password);
*
* // get my private key
* KeyStore.PrivateKeyEntry pkEntry = (KeyStore.PrivateKeyEntry)
* ks.getEntry("privateKeyAlias", protParam);
* PrivateKey myPrivateKey = pkEntry.getPrivateKey();
*
* // save my secret key
* javax.crypto.SecretKey mySecretKey;
* KeyStore.SecretKeyEntry skEntry =
* new KeyStore.SecretKeyEntry(mySecretKey);
* ks.setEntry("secretKeyAlias", skEntry, protParam);
*
* // store away the keystore
* try (FileOutputStream fos = new FileOutputStream("newKeyStoreName")) {
* ks.store(fos, password);
* }
* </pre>
*
* Note that although the same password may be used to
* load the keystore, to protect the private key entry,
* to protect the secret key entry, and to store the keystore
* (as is shown in the sample code above),
* different passwords or other protection parameters
* may also be used.
*
* <p> Every implementation of the Java platform is required to support
* the following standard {@code KeyStore} type:
* <ul>
* <li>{@code PKCS12}</li>
* </ul>
* This type is described in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyStore">
* KeyStore section</a> of the
* Java Cryptography Architecture Standard Algorithm Name Documentation.
* Consult the release documentation for your implementation to see if any
* other types are supported.
*
* @author Jan Luehe
*
* @see java.security.PrivateKey
* @see javax.crypto.SecretKey
* @see java.security.cert.Certificate
*
* @since 1.2
*/
public class KeyStore {
/*
* Constant to lookup in the Security properties file to determine
* the default keystore type.
* In the Security properties file, the default keystore type is given as:
* <pre>
* keystore.type=jks
* </pre>
*/
private static final String KEYSTORE_TYPE = "keystore.type";
// The keystore type
private String type;
// The provider
private Provider provider;
// The provider implementation
private KeyStoreSpi keyStoreSpi;
// Has this keystore been initialized (loaded)?
private boolean initialized = false;
/**
* A marker interface for {@code KeyStore}
* {@link #load(KeyStore.LoadStoreParameter) load}
* and
* {@link #store(KeyStore.LoadStoreParameter) store}
* parameters.
*
* @since 1.5
*/
public static interface LoadStoreParameter {
/**
* Gets the parameter used to protect keystore data.
*
* @return the parameter used to protect keystore data, or null
*/
public ProtectionParameter getProtectionParameter();
}
/**
* A marker interface for keystore protection parameters.
*
* <p> The information stored in a {@code ProtectionParameter}
* object protects the contents of a keystore.
* For example, protection parameters may be used to check
* the integrity of keystore data, or to protect the
* confidentiality of sensitive keystore data
* (such as a {@code PrivateKey}).
*
* @since 1.5
*/
public static interface ProtectionParameter { }
/**
* A password-based implementation of {@code ProtectionParameter}.
*
* @since 1.5
*/
public static class PasswordProtection implements
ProtectionParameter, javax.security.auth.Destroyable {
private final char[] password;
private final String protectionAlgorithm;
private final AlgorithmParameterSpec protectionParameters;
private volatile boolean destroyed = false;
/**
* Creates a password parameter.
*
* <p> The specified {@code password} is cloned before it is stored
* in the new {@code PasswordProtection} object.
*
* @param password the password, which may be {@code null}
*/
public PasswordProtection(char[] password) {
this.password = (password == null) ? null : password.clone();
this.protectionAlgorithm = null;
this.protectionParameters = null;
}
/**
* Creates a password parameter and specifies the protection algorithm
* and associated parameters to use when encrypting a keystore entry.
* <p>
* The specified {@code password} is cloned before it is stored in the
* new {@code PasswordProtection} object.
*
* @param password the password, which may be {@code null}
* @param protectionAlgorithm the encryption algorithm name, for
* example, {@code PBEWithHmacSHA256AndAES_256}.
* See the Cipher section in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#Cipher">
* Java Cryptography Architecture Standard Algorithm Name
* Documentation</a>
* for information about standard encryption algorithm names.
* @param protectionParameters the encryption algorithm parameter
* specification, which may be {@code null}
* @exception NullPointerException if {@code protectionAlgorithm} is
* {@code null}
*
* @since 1.8
*/
public PasswordProtection(char[] password, String protectionAlgorithm,
AlgorithmParameterSpec protectionParameters) {
if (protectionAlgorithm == null) {
throw new NullPointerException("invalid null input");
}
this.password = (password == null) ? null : password.clone();
this.protectionAlgorithm = protectionAlgorithm;
this.protectionParameters = protectionParameters;
}
/**
* Gets the name of the protection algorithm.
* If none was set then the keystore provider will use its default
* protection algorithm. The name of the default protection algorithm
* for a given keystore type is set using the
* {@code 'keystore.<type>.keyProtectionAlgorithm'} security property.
* For example, the
* {@code keystore.PKCS12.keyProtectionAlgorithm} property stores the
* name of the default key protection algorithm used for PKCS12
* keystores. If the security property is not set, an
* implementation-specific algorithm will be used.
*
* @return the algorithm name, or {@code null} if none was set
*
* @since 1.8
*/
public String getProtectionAlgorithm() {
return protectionAlgorithm;
}
/**
* Gets the parameters supplied for the protection algorithm.
*
* @return the algorithm parameter specification, or {@code null},
* if none was set
*
* @since 1.8
*/
public AlgorithmParameterSpec getProtectionParameters() {
return protectionParameters;
}
/**
* Gets the password.
*
* <p>Note that this method returns a reference to the password.
* If a clone of the array is created it is the caller's
* responsibility to zero out the password information
* after it is no longer needed.
*
* @see #destroy()
* @return the password, which may be {@code null}
* @exception IllegalStateException if the password has
* been cleared (destroyed)
*/
public synchronized char[] getPassword() {
if (destroyed) {
throw new IllegalStateException("password has been cleared");
}
return password;
}
/**
* Clears the password.
*
* @exception DestroyFailedException if this method was unable
* to clear the password
*/
public synchronized void destroy() throws DestroyFailedException {
destroyed = true;
if (password != null) {
Arrays.fill(password, ' ');
}
}
/**
* Determines if password has been cleared.
*
* @return true if the password has been cleared, false otherwise
*/
public synchronized boolean isDestroyed() {
return destroyed;
}
}
/**
* A ProtectionParameter encapsulating a CallbackHandler.
*
* @since 1.5
*/
public static class CallbackHandlerProtection
implements ProtectionParameter {
private final CallbackHandler handler;
/**
* Constructs a new CallbackHandlerProtection from a
* CallbackHandler.
*
* @param handler the CallbackHandler
* @exception NullPointerException if handler is null
*/
public CallbackHandlerProtection(CallbackHandler handler) {
if (handler == null) {
throw new NullPointerException("handler must not be null");
}
this.handler = handler;
}
/**
* Returns the CallbackHandler.
*
* @return the CallbackHandler.
*/
public CallbackHandler getCallbackHandler() {
return handler;
}
}
/**
* A marker interface for {@code KeyStore} entry types.
*
* @since 1.5
*/
public static interface Entry {
/**
* Retrieves the attributes associated with an entry.
* <p>
* The default implementation returns an empty {@code Set}.
*
* @return an unmodifiable {@code Set} of attributes, possibly empty
*
* @since 1.8
*/
public default Set<Attribute> getAttributes() {
return Collections.<Attribute>emptySet();
}
/**
* An attribute associated with a keystore entry.
* It comprises a name and one or more values.
*
* @since 1.8
*/
public interface Attribute {
/**
* Returns the attribute's name.
*
* @return the attribute name
*/
public String getName();
/**
* Returns the attribute's value.
* Multi-valued attributes encode their values as a single string.
*
* @return the attribute value
*/
public String getValue();
}
}
/**
* A {@code KeyStore} entry that holds a {@code PrivateKey}
* and corresponding certificate chain.
*
* @since 1.5
*/
public static final class PrivateKeyEntry implements Entry {
private final PrivateKey privKey;
private final Certificate[] chain;
private final Set<Attribute> attributes;
/**
* Constructs a {@code PrivateKeyEntry} with a
* {@code PrivateKey} and corresponding certificate chain.
*
* <p> The specified {@code chain} is cloned before it is stored
* in the new {@code PrivateKeyEntry} object.
*
* @param privateKey the {@code PrivateKey}
* @param chain an array of {@code Certificate}s
* representing the certificate chain.
* The chain must be ordered and contain a
* {@code Certificate} at index 0
* corresponding to the private key.
*
* @exception NullPointerException if
* {@code privateKey} or {@code chain}
* is {@code null}
* @exception IllegalArgumentException if the specified chain has a
* length of 0, if the specified chain does not contain
* {@code Certificate}s of the same type,
* or if the {@code PrivateKey} algorithm
* does not match the algorithm of the {@code PublicKey}
* in the end entity {@code Certificate} (at index 0)
*/
public PrivateKeyEntry(PrivateKey privateKey, Certificate[] chain) {
this(privateKey, chain, Collections.<Attribute>emptySet());
}
/**
* Constructs a {@code PrivateKeyEntry} with a {@code PrivateKey} and
* corresponding certificate chain and associated entry attributes.
*
* <p> The specified {@code chain} and {@code attributes} are cloned
* before they are stored in the new {@code PrivateKeyEntry} object.
*
* @param privateKey the {@code PrivateKey}
* @param chain an array of {@code Certificate}s
* representing the certificate chain.
* The chain must be ordered and contain a
* {@code Certificate} at index 0
* corresponding to the private key.
* @param attributes the attributes
*
* @exception NullPointerException if {@code privateKey}, {@code chain}
* or {@code attributes} is {@code null}
* @exception IllegalArgumentException if the specified chain has a
* length of 0, if the specified chain does not contain
* {@code Certificate}s of the same type,
* or if the {@code PrivateKey} algorithm
* does not match the algorithm of the {@code PublicKey}
* in the end entity {@code Certificate} (at index 0)
*
* @since 1.8
*/
public PrivateKeyEntry(PrivateKey privateKey, Certificate[] chain,
Set<Attribute> attributes) {
if (privateKey == null || chain == null || attributes == null) {
throw new NullPointerException("invalid null input");
}
if (chain.length == 0) {
throw new IllegalArgumentException
("invalid zero-length input chain");
}
Certificate[] clonedChain = chain.clone();
String certType = clonedChain[0].getType();
for (int i = 1; i < clonedChain.length; i++) {
if (!certType.equals(clonedChain[i].getType())) {
throw new IllegalArgumentException
("chain does not contain certificates " +
"of the same type");
}
}
if (!privateKey.getAlgorithm().equals
(clonedChain[0].getPublicKey().getAlgorithm())) {
throw new IllegalArgumentException
("private key algorithm does not match " +
"algorithm of public key in end entity " +
"certificate (at index 0)");
}
this.privKey = privateKey;
if (clonedChain[0] instanceof X509Certificate &&
!(clonedChain instanceof X509Certificate[])) {
this.chain = new X509Certificate[clonedChain.length];
System.arraycopy(clonedChain, 0,
this.chain, 0, clonedChain.length);
} else {
this.chain = clonedChain;
}
this.attributes =
Collections.unmodifiableSet(new HashSet<>(attributes));
}
/**
* Gets the {@code PrivateKey} from this entry.
*
* @return the {@code PrivateKey} from this entry
*/
public PrivateKey getPrivateKey() {
return privKey;
}
/**
* Gets the {@code Certificate} chain from this entry.
*
* <p> The stored chain is cloned before being returned.
*
* @return an array of {@code Certificate}s corresponding
* to the certificate chain for the public key.
* If the certificates are of type X.509,
* the runtime type of the returned array is
* {@code X509Certificate[]}.
*/
public Certificate[] getCertificateChain() {
return chain.clone();
}
/**
* Gets the end entity {@code Certificate}
* from the certificate chain in this entry.
*
* @return the end entity {@code Certificate} (at index 0)
* from the certificate chain in this entry.
* If the certificate is of type X.509,
* the runtime type of the returned certificate is
* {@code X509Certificate}.
*/
public Certificate getCertificate() {
return chain[0];
}
/**
* Retrieves the attributes associated with an entry.
* <p>
*
* @return an unmodifiable {@code Set} of attributes, possibly empty
*
* @since 1.8
*/
@Override
public Set<Attribute> getAttributes() {
return attributes;
}
/**
* Returns a string representation of this PrivateKeyEntry.
* @return a string representation of this PrivateKeyEntry.
*/
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Private key entry and certificate chain with "
+ chain.length + " elements:\r\n");
for (Certificate cert : chain) {
sb.append(cert);
sb.append("\r\n");
}
return sb.toString();
}
}
/**
* A {@code KeyStore} entry that holds a {@code SecretKey}.
*
* @since 1.5
*/
public static final class SecretKeyEntry implements Entry {
private final SecretKey sKey;
private final Set<Attribute> attributes;
/**
* Constructs a {@code SecretKeyEntry} with a
* {@code SecretKey}.
*
* @param secretKey the {@code SecretKey}
*
* @exception NullPointerException if {@code secretKey}
* is {@code null}
*/
public SecretKeyEntry(SecretKey secretKey) {
if (secretKey == null) {
throw new NullPointerException("invalid null input");
}
this.sKey = secretKey;
this.attributes = Collections.<Attribute>emptySet();
}
/**
* Constructs a {@code SecretKeyEntry} with a {@code SecretKey} and
* associated entry attributes.
*
* <p> The specified {@code attributes} is cloned before it is stored
* in the new {@code SecretKeyEntry} object.
*
* @param secretKey the {@code SecretKey}
* @param attributes the attributes
*
* @exception NullPointerException if {@code secretKey} or
* {@code attributes} is {@code null}
*
* @since 1.8
*/
public SecretKeyEntry(SecretKey secretKey, Set<Attribute> attributes) {
if (secretKey == null || attributes == null) {
throw new NullPointerException("invalid null input");
}
this.sKey = secretKey;
this.attributes =
Collections.unmodifiableSet(new HashSet<>(attributes));
}
/**
* Gets the {@code SecretKey} from this entry.
*
* @return the {@code SecretKey} from this entry
*/
public SecretKey getSecretKey() {
return sKey;
}
/**
* Retrieves the attributes associated with an entry.
* <p>
*
* @return an unmodifiable {@code Set} of attributes, possibly empty
*
* @since 1.8
*/
@Override
public Set<Attribute> getAttributes() {
return attributes;
}
/**
* Returns a string representation of this SecretKeyEntry.
* @return a string representation of this SecretKeyEntry.
*/
public String toString() {
return "Secret key entry with algorithm " + sKey.getAlgorithm();
}
}
/**
* A {@code KeyStore} entry that holds a trusted
* {@code Certificate}.
*
* @since 1.5
*/
public static final class TrustedCertificateEntry implements Entry {
private final Certificate cert;
private final Set<Attribute> attributes;
/**
* Constructs a {@code TrustedCertificateEntry} with a
* trusted {@code Certificate}.
*
* @param trustedCert the trusted {@code Certificate}
*
* @exception NullPointerException if
* {@code trustedCert} is {@code null}
*/
public TrustedCertificateEntry(Certificate trustedCert) {
if (trustedCert == null) {
throw new NullPointerException("invalid null input");
}
this.cert = trustedCert;
this.attributes = Collections.<Attribute>emptySet();
}
/**
* Constructs a {@code TrustedCertificateEntry} with a
* trusted {@code Certificate} and associated entry attributes.
*
* <p> The specified {@code attributes} is cloned before it is stored
* in the new {@code TrustedCertificateEntry} object.
*
* @param trustedCert the trusted {@code Certificate}
* @param attributes the attributes
*
* @exception NullPointerException if {@code trustedCert} or
* {@code attributes} is {@code null}
*
* @since 1.8
*/
public TrustedCertificateEntry(Certificate trustedCert,
Set<Attribute> attributes) {
if (trustedCert == null || attributes == null) {
throw new NullPointerException("invalid null input");
}
this.cert = trustedCert;
this.attributes =
Collections.unmodifiableSet(new HashSet<>(attributes));
}
/**
* Gets the trusted {@code Certficate} from this entry.
*
* @return the trusted {@code Certificate} from this entry
*/
public Certificate getTrustedCertificate() {
return cert;
}
/**
* Retrieves the attributes associated with an entry.
* <p>
*
* @return an unmodifiable {@code Set} of attributes, possibly empty
*
* @since 1.8
*/
@Override
public Set<Attribute> getAttributes() {
return attributes;
}
/**
* Returns a string representation of this TrustedCertificateEntry.
* @return a string representation of this TrustedCertificateEntry.
*/
public String toString() {
return "Trusted certificate entry:\r\n" + cert.toString();
}
}
/**
* Creates a KeyStore object of the given type, and encapsulates the given
* provider implementation (SPI object) in it.
*
* @param keyStoreSpi the provider implementation.
* @param provider the provider.
* @param type the keystore type.
*/
protected KeyStore(KeyStoreSpi keyStoreSpi, Provider provider, String type)
{
this.keyStoreSpi = keyStoreSpi;
this.provider = provider;
this.type = type;
}
/**
* Returns a keystore object of the specified type.
*
* <p> This method traverses the list of registered security Providers,
* starting with the most preferred Provider.
* A new KeyStore object encapsulating the
* KeyStoreSpi implementation from the first
* Provider that supports the specified type is returned.
*
* <p> Note that the list of registered providers may be retrieved via
* the {@link Security#getProviders() Security.getProviders()} method.
*
* @param type the type of keystore.
* See the KeyStore section in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyStore">
* Java Cryptography Architecture Standard Algorithm Name Documentation</a>
* for information about standard keystore types.
*
* @return a keystore object of the specified type.
*
* @exception KeyStoreException if no Provider supports a
* KeyStoreSpi implementation for the
* specified type.
*
* @see Provider
*/
public static KeyStore getInstance(String type)
throws KeyStoreException
{
try {
Object[] objs = Security.getImpl(type, "KeyStore", (String)null);
return new KeyStore((KeyStoreSpi)objs[0], (Provider)objs[1], type);
} catch (NoSuchAlgorithmException nsae) {
throw new KeyStoreException(type + " not found", nsae);
} catch (NoSuchProviderException nspe) {
throw new KeyStoreException(type + " not found", nspe);
}
}
/**
* Returns a keystore object of the specified type.
*
* <p> A new KeyStore object encapsulating the
* KeyStoreSpi implementation from the specified provider
* is returned. The specified provider must be registered
* in the security provider list.
*
* <p> Note that the list of registered providers may be retrieved via
* the {@link Security#getProviders() Security.getProviders()} method.
*
* @param type the type of keystore.
* See the KeyStore section in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyStore">
* Java Cryptography Architecture Standard Algorithm Name Documentation</a>
* for information about standard keystore types.
*
* @param provider the name of the provider.
*
* @return a keystore object of the specified type.
*
* @exception KeyStoreException if a KeyStoreSpi
* implementation for the specified type is not
* available from the specified provider.
*
* @exception NoSuchProviderException if the specified provider is not
* registered in the security provider list.
*
* @exception IllegalArgumentException if the provider name is null
* or empty.
*
* @see Provider
*/
public static KeyStore getInstance(String type, String provider)
throws KeyStoreException, NoSuchProviderException
{
if (provider == null || provider.length() == 0)
throw new IllegalArgumentException("missing provider");
try {
Object[] objs = Security.getImpl(type, "KeyStore", provider);
return new KeyStore((KeyStoreSpi)objs[0], (Provider)objs[1], type);
} catch (NoSuchAlgorithmException nsae) {
throw new KeyStoreException(type + " not found", nsae);
}
}
/**
* Returns a keystore object of the specified type.
*
* <p> A new KeyStore object encapsulating the
* KeyStoreSpi implementation from the specified Provider
* object is returned. Note that the specified Provider object
* does not have to be registered in the provider list.
*
* @param type the type of keystore.
* See the KeyStore section in the <a href=
* "{@docRoot}/../technotes/guides/security/StandardNames.html#KeyStore">
* Java Cryptography Architecture Standard Algorithm Name Documentation</a>
* for information about standard keystore types.
*
* @param provider the provider.
*
* @return a keystore object of the specified type.
*
* @exception KeyStoreException if KeyStoreSpi
* implementation for the specified type is not available
* from the specified Provider object.
*
* @exception IllegalArgumentException if the specified provider is null.
*
* @see Provider
*
* @since 1.4
*/
public static KeyStore getInstance(String type, Provider provider)
throws KeyStoreException
{
if (provider == null)
throw new IllegalArgumentException("missing provider");
try {
Object[] objs = Security.getImpl(type, "KeyStore", provider);
return new KeyStore((KeyStoreSpi)objs[0], (Provider)objs[1], type);
} catch (NoSuchAlgorithmException nsae) {
throw new KeyStoreException(type + " not found", nsae);
}
}
/**
* Returns the default keystore type as specified by the
* {@code keystore.type} security property, or the string
* {@literal "jks"} (acronym for {@literal "Java keystore"})
* if no such property exists.
*
* <p>The default keystore type can be used by applications that do not
* want to use a hard-coded keystore type when calling one of the
* {@code getInstance} methods, and want to provide a default keystore
* type in case a user does not specify its own.
*
* <p>The default keystore type can be changed by setting the value of the
* {@code keystore.type} security property to the desired keystore type.
*
* @return the default keystore type as specified by the
* {@code keystore.type} security property, or the string {@literal "jks"}
* if no such property exists.
* @see java.security.Security security properties
*/
public final static String getDefaultType() {
String kstype;
kstype = AccessController.doPrivileged(new PrivilegedAction<String>() {
public String run() {
return Security.getProperty(KEYSTORE_TYPE);
}
});
if (kstype == null) {
kstype = "jks";
}
return kstype;
}
/**
* Returns the provider of this keystore.
*
* @return the provider of this keystore.
*/
public final Provider getProvider()
{
return this.provider;
}
/**
* Returns the type of this keystore.
*
* @return the type of this keystore.
*/
public final String getType()
{
return this.type;
}
/**
* Returns the key associated with the given alias, using the given
* password to recover it. The key must have been associated with
* the alias by a call to {@code setKeyEntry},
* or by a call to {@code setEntry} with a
* {@code PrivateKeyEntry} or {@code SecretKeyEntry}.
*
* @param alias the alias name
* @param password the password for recovering the key
*
* @return the requested key, or null if the given alias does not exist
* or does not identify a key-related entry.
*
* @exception KeyStoreException if the keystore has not been initialized
* (loaded).
* @exception NoSuchAlgorithmException if the algorithm for recovering the
* key cannot be found