/* KeyStore.java --- Key Store Class
Copyright (C) 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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General Public License for more details.
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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package java.security;
import gnu.java.security.Engine;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.cert.CertificateException;
import java.util.Date;
import java.util.Enumeration;
/**
* Keystore represents an in-memory collection of keys and
* certificates. There are two types of entries:
*
* <dl>
* <dt>Key Entry</dt>
*
* <dd><p>This type of keystore entry store sensitive crytographic key
* information in a protected format.Typically this is a secret
* key or a private key with a certificate chain.</p></dd>
*
* <dt>Trusted Ceritificate Entry</dt>
*
* <dd><p>This type of keystore entry contains a single public key
* certificate belonging to annother entity. It is called trusted
* because the keystore owner trusts that the certificates
* belongs to the subject (owner) of the certificate.</p></dd>
* </dl>
*
* <p>Entries in a key store are referred to by their "alias": a simple
* unique string.
*
* <p>The structure and persistentence of the key store is not
* specified. Any method could be used to protect sensitive
* (private or secret) keys. Smart cards or integrated
* cryptographic engines could be used or the keystore could
* be simply stored in a file.</p>
*
* @see java.security.cert.Certificate
* @see Key
*/
public class KeyStore
{
// Constants and fields.
// ------------------------------------------------------------------------
/** Service name for key stores. */
private static final String KEY_STORE = "KeyStore";
private KeyStoreSpi keyStoreSpi;
private Provider provider;
private String type;
// Constructors.
// ------------------------------------------------------------------------
/**
Creates an instance of KeyStore
@param keyStoreSpi A KeyStore engine to use
@param provider A provider to use
@param type The type of KeyStore
*/
protected KeyStore(KeyStoreSpi keyStoreSpi, Provider provider, String type)
{
this.keyStoreSpi = keyStoreSpi;
this.provider = provider;
this.type = type;
}
// Class methods.
// ------------------------------------------------------------------------
/**
* Gets an instance of the KeyStore class representing
* the specified keystore. If the type is not
* found then, it throws KeyStoreException.
*
* @param type the type of keystore to choose
* @return a KeyStore repesenting the desired type
* @throws KeyStoreException if the type of keystore is not implemented
* by providers or the implementation cannot be instantiated.
*/
public static KeyStore getInstance(String type) throws KeyStoreException
{
Provider[] p = Security.getProviders();
for (int i = 0; i < p.length; i++)
{
try
{
return getInstance(type, p[i]);
}
catch (KeyStoreException e)
{
// Ignore.
}
}
throw new KeyStoreException(type);
}
/**
* Gets an instance of the KeyStore class representing
* the specified key store from the specified provider.
* If the type is not found then, it throws KeyStoreException.
* If the provider is not found, then it throws
* NoSuchProviderException.
*
* @param type the type of keystore to choose
* @param provider the provider name
* @return a KeyStore repesenting the desired type
* @throws KeyStoreException if the type of keystore is not
* implemented by the given provider
* @throws NoSuchProviderException if the provider is not found
* @throws IllegalArgumentException if the provider string is
* null or empty
*/
public static KeyStore getInstance(String type, String provider)
throws KeyStoreException, NoSuchProviderException
{
if (provider == null || provider.length() == 0)
throw new IllegalArgumentException("Illegal provider");
Provider p = Security.getProvider(provider);
if (p == null)
throw new NoSuchProviderException();
return getInstance(type, p);
}
/**
* Gets an instance of the KeyStore class representing
* the specified key store from the specified provider.
* If the type is not found then, it throws KeyStoreException.
* If the provider is not found, then it throws
* NoSuchProviderException.
*
* @param type the type of keystore to choose
* @param provider the keystore provider
* @return a KeyStore repesenting the desired type
* @throws KeyStoreException if the type of keystore is not
* implemented by the given provider
* @throws IllegalArgumentException if the provider object is null
* @since 1.4
*/
public static KeyStore getInstance(String type, Provider provider)
throws KeyStoreException
{
if (provider == null)
throw new IllegalArgumentException("Illegal provider");
try
{
return new KeyStore(
(KeyStoreSpi) Engine.getInstance(KEY_STORE, type, provider),
provider, type);
}
catch (NoSuchAlgorithmException nsae)
{
throw new KeyStoreException(type);
}
catch (java.lang.reflect.InvocationTargetException ite)
{
throw new KeyStoreException(type);
}
catch (ClassCastException cce)
{
throw new KeyStoreException(type);
}
}
/**
* Returns the default KeyStore type. This method looks up the
* type in <JAVA_HOME>/lib/security/java.security with the
* property "keystore.type" or if that fails then "jks" .
*/
public static final String getDefaultType()
{
// Security reads every property in java.security so it
// will return this property if it exists.
String tmp = Security.getProperty("keystore.type");
if (tmp == null)
tmp = "jks";
return tmp;
}
// Instance methods.
// ------------------------------------------------------------------------
/**
Gets the provider that the class is from.
@return the provider of this class
*/
public final Provider getProvider()
{
return provider;
}
/**
Returns the type of the KeyStore supported
@return A string with the type of KeyStore
*/
public final String getType()
{
return type;
}
/**
Returns the key associated with given alias using the
supplied password.
@param alias an alias for the key to get
@param password password to access key with
@return the requested key, or null otherwise
@throws NoSuchAlgorithmException if there is no algorithm
for recovering the key
@throws UnrecoverableKeyException key cannot be reocovered
(wrong password).
*/
public final Key getKey(String alias, char[]password)
throws KeyStoreException, NoSuchAlgorithmException,
UnrecoverableKeyException
{
return keyStoreSpi.engineGetKey(alias, password);
}
/**
Gets a Certificate chain for the specified alias.
@param alias the alias name
@return a chain of Certificates ( ordered from the user's
certificate to the Certificate Authority's ) or
null if the alias does not exist or there is no
certificate chain for the alias ( the alias refers
to a trusted certificate entry or there is no entry).
*/
public final java.security.cert.
Certificate[] getCertificateChain(String alias) throws KeyStoreException
{
return keyStoreSpi.engineGetCertificateChain(alias);
}
/**
Gets a Certificate for the specified alias.
If there is a trusted certificate entry then that is returned.
it there is a key entry with a certificate chain then the
first certificate is return or else null.
@param alias the alias name
@return a Certificate or null if the alias does not exist
or there is no certificate for the alias
*/
public final java.security.cert.Certificate getCertificate(String alias)
throws KeyStoreException
{
return keyStoreSpi.engineGetCertificate(alias);
}
/**
Gets entry creation date for the specified alias.
@param alias the alias name
@returns the entry creation date or null
*/
public final Date getCreationDate(String alias) throws KeyStoreException
{
return keyStoreSpi.engineGetCreationDate(alias);
}
/**
Assign the key to the alias in the keystore, protecting it
with the given password. It will overwrite an existing
entry and if the key is a PrivateKey, also add the
certificate chain representing the corresponding public key.
@param alias the alias name
@param key the key to add
@password the password to protect with
@param chain the certificate chain for the corresponding
public key
@throws KeyStoreException if it fails
*/
public final void setKeyEntry(String alias, Key key, char[]password,
java.security.cert.
Certificate[]chain) throws KeyStoreException
{
keyStoreSpi.engineSetKeyEntry(alias, key, password, chain);
}
/**
Assign the key to the alias in the keystore. It will overwrite
an existing entry and if the key is a PrivateKey, also
add the certificate chain representing the corresponding
public key.
@param alias the alias name
@param key the key to add
@param chain the certificate chain for the corresponding
public key
@throws KeyStoreException if it fails
*/
public final void setKeyEntry(String alias, byte[]key,
java.security.cert.
Certificate[]chain) throws KeyStoreException
{
keyStoreSpi.engineSetKeyEntry(alias, key, chain);
}
/**
Assign the certificate to the alias in the keystore. It
will overwrite an existing entry.
@param alias the alias name
@param cert the certificate to add
@throws KeyStoreException if it fails
*/
public final void setCertificateEntry(String alias,
java.security.cert.
Certificate cert) throws
KeyStoreException
{
keyStoreSpi.engineSetCertificateEntry(alias, cert);
}
/**
Deletes the entry for the specified entry.
@param alias the alias name
@throws KeyStoreException if it fails
*/
public final void deleteEntry(String alias) throws KeyStoreException
{
keyStoreSpi.engineDeleteEntry(alias);
}
/**
Generates a list of all the aliases in the keystore.
@return an Enumeration of the aliases
*/
public final Enumeration aliases() throws KeyStoreException
{
return keyStoreSpi.engineAliases();
}
/**
Determines if the keystore contains the specified alias.
@param alias the alias name
@return true if it contains the alias, false otherwise
*/
public final boolean containsAlias(String alias) throws KeyStoreException
{
return keyStoreSpi.engineContainsAlias(alias);
}
/**
Returns the number of entries in the keystore.
@returns the number of keystore entries.
*/
public final int size() throws KeyStoreException
{
return keyStoreSpi.engineSize();
}
/**
Determines if the keystore contains a key entry for
the specified alias.
@param alias the alias name
@return true if it is a key entry, false otherwise
*/
public final boolean isKeyEntry(String alias) throws KeyStoreException
{
return keyStoreSpi.engineIsKeyEntry(alias);
}
/**
Determines if the keystore contains a certificate entry for
the specified alias.
@param alias the alias name
@return true if it is a certificate entry, false otherwise
*/
public final boolean isCertificateEntry(String alias)
throws KeyStoreException
{
return keyStoreSpi.engineIsCertificateEntry(alias);
}
/**
Determines if the keystore contains the specified certificate
entry and returns the alias.
It checks every entry and for a key entry checks only the
first certificate in the chain.
@param cert Certificate to look for
@return alias of first matching certificate, null if it
does not exist.
*/
public final String getCertificateAlias(java.security.cert.Certificate cert)
throws KeyStoreException
{
return keyStoreSpi.engineGetCertificateAlias(cert);
}
/**
Stores the keystore in the specified output stream and it
uses the specified key it keep it secure.
@param stream the output stream to save the keystore to
@param password the password to protect the keystore integrity with
@throws IOException if an I/O error occurs.
@throws NoSuchAlgorithmException the data integrity algorithm
used cannot be found.
@throws CertificateException if any certificates could not be
stored in the output stream.
*/
public final void store(OutputStream stream, char[]password)
throws KeyStoreException, IOException, NoSuchAlgorithmException,
CertificateException
{
keyStoreSpi.engineStore(stream, password);
}
/**
Loads the keystore from the specified input stream and it
uses the specified password to check for integrity if supplied.
@param stream the input stream to load the keystore from
@param password the password to check the keystore integrity with
@throws IOException if an I/O error occurs.
@throws NoSuchAlgorithmException the data integrity algorithm
used cannot be found.
@throws CertificateException if any certificates could not be
stored in the output stream.
*/
public final void load(InputStream stream, char[]password)
throws IOException, NoSuchAlgorithmException, CertificateException
{
keyStoreSpi.engineLoad(stream, password);
}
}