KeyStoreSpi

java.lang.Object
- java.security.KeyStoreSpi

```
public abstract class KeyStoreSpi
extends Object
```
This class defines the Service Provider Interface ( SPI) for the KeyStore class. All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a keystore for a particular keystore type.

Since:

1.2

See Also:

KeyStore

Constructor Summary

Constructors

Constructor and Description
`KeyStoreSpi()`

Method Summary

All Methods

Instance Methods

Abstract Methods

Concrete Methods
Modifier and Type	Method and Description
`abstract Enumeration<String>`	`engineAliases()` Lists all the alias names of this keystore.
`abstract boolean`	`engineContainsAlias(String alias)` Checks if the given alias exists in this keystore.
`abstract void`	`engineDeleteEntry(String alias)` Deletes the entry identified by the given alias from this keystore.
`boolean`	`engineEntryInstanceOf(String alias, Class<? extends KeyStore.Entry> entryClass)` Determines if the keystore `Entry` for the specified `alias` is an instance or subclass of the specified `entryClass`.
`abstract Certificate`	`engineGetCertificate(String alias)` Returns the certificate associated with the given alias.
`abstract String`	`engineGetCertificateAlias(Certificate cert)` Returns the (alias) name of the first keystore entry whose certificate matches the given certificate.
`abstract Certificate[]`	`engineGetCertificateChain(String alias)` Returns the certificate chain associated with the given alias.
`abstract Date`	`engineGetCreationDate(String alias)` Returns the creation date of the entry identified by the given alias.
`KeyStore.Entry`	`engineGetEntry(String alias, KeyStore.ProtectionParameter protParam)` Gets a `KeyStore.Entry` for the specified alias with the specified protection parameter.
`abstract Key`	`engineGetKey(String alias, char[] password)` Returns the key associated with the given alias, using the given password to recover it.
`abstract boolean`	`engineIsCertificateEntry(String alias)` Returns true if the entry identified by the given alias was created by a call to `setCertificateEntry`, or created by a call to `setEntry` with a `TrustedCertificateEntry`.
`abstract boolean`	`engineIsKeyEntry(String alias)` Returns true if the entry identified by the given alias was created by a call to `setKeyEntry`, or created by a call to `setEntry` with a `PrivateKeyEntry` or a `SecretKeyEntry`.
`abstract void`	`engineLoad(InputStream stream, char[] password)` Loads the keystore from the given input stream.
`void`	`engineLoad(KeyStore.LoadStoreParameter param)` Loads the keystore using the given `KeyStore.LoadStoreParameter`.
`abstract void`	`engineSetCertificateEntry(String alias, Certificate cert)` Assigns the given certificate to the given alias.
`void`	`engineSetEntry(String alias, KeyStore.Entry entry, KeyStore.ProtectionParameter protParam)` Saves a `KeyStore.Entry` under the specified alias.
`abstract void`	`engineSetKeyEntry(String alias, byte[] key, Certificate[] chain)` Assigns the given key (that has already been protected) to the given alias.
`abstract void`	`engineSetKeyEntry(String alias, Key key, char[] password, Certificate[] chain)` Assigns the given key to the given alias, protecting it with the given password.
`abstract int`	`engineSize()` Retrieves the number of entries in this keystore.
`void`	`engineStore(KeyStore.LoadStoreParameter param)` Stores this keystore using the given `KeyStore.LoadStoreParmeter`.
`abstract void`	`engineStore(OutputStream stream, char[] password)` Stores this keystore to the given output stream, and protects its integrity with the given password.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - KeyStoreSpi
```
public KeyStoreSpi()
```
- Method Detail
  - engineGetKey
```
public abstract Key engineGetKey(String alias,
                                 char[] password)
                          throws NoSuchAlgorithmException,
                                 UnrecoverableKeyException
```
    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 setKeyEntry, or by a call to setEntry with a PrivateKeyEntry or SecretKeyEntry.
    
    Parameters:
    
    alias - the alias name
    
    password - the password for recovering the key
    
    Returns:
    
    the requested key, or null if the given alias does not exist or does not identify a key-related entry.
    
    Throws:
    
    NoSuchAlgorithmException - if the algorithm for recovering the key cannot be found
    
    UnrecoverableKeyException - if the key cannot be recovered (e.g., the given password is wrong).
  - engineGetCertificateChain
```
public abstract Certificate[] engineGetCertificateChain(String alias)
```
    Returns the certificate chain associated with the given alias. The certificate chain must have been associated with the alias by a call to setKeyEntry, or by a call to setEntry with a PrivateKeyEntry.
    
    Parameters:
    
    alias - the alias name
    
    Returns:
    
    the certificate chain (ordered with the user's certificate first and the root certificate authority last), or null if the given alias does not exist or does not contain a certificate chain
  - engineGetCertificate
```
public abstract Certificate engineGetCertificate(String alias)
```
    Returns the certificate associated with the given alias.
    If the given alias name identifies an entry created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry, then the trusted certificate contained in that entry is returned.
    
    If the given alias name identifies an entry created by a call to setKeyEntry, or created by a call to setEntry with a PrivateKeyEntry, then the first element of the certificate chain in that entry (if a chain exists) is returned.
    
    Parameters:
    
    alias - the alias name
    
    Returns:
    
    the certificate, or null if the given alias does not exist or does not contain a certificate.
  - engineGetCreationDate
```
public abstract Date engineGetCreationDate(String alias)
```
    Returns the creation date of the entry identified by the given alias.
    
    Parameters:
    
    alias - the alias name
    
    Returns:
    
    the creation date of this entry, or null if the given alias does not exist
  - engineSetKeyEntry
```
public abstract void engineSetKeyEntry(String alias,
                                       Key key,
                                       char[] password,
                                       Certificate[] chain)
                                throws KeyStoreException
```
    Assigns the given key to the given alias, protecting it with the given password.
    If the given key is of type java.security.PrivateKey, it must be accompanied by a certificate chain certifying the corresponding public key.
    
    If the given alias already exists, the keystore information associated with it is overridden by the given key (and possibly certificate chain).
    
    Parameters:
    
    alias - the alias name
    
    key - the key to be associated with the alias
    
    password - the password to protect the key
    
    chain - the certificate chain for the corresponding public key (only required if the given key is of type java.security.PrivateKey).
    
    Throws:
    
    KeyStoreException - if the given key cannot be protected, or this operation fails for some other reason
  - engineSetKeyEntry
```
public abstract void engineSetKeyEntry(String alias,
                                       byte[] key,
                                       Certificate[] chain)
                                throws KeyStoreException
```
    Assigns the given key (that has already been protected) to the given alias.
    If the protected key is of type java.security.PrivateKey, it must be accompanied by a certificate chain certifying the corresponding public key.
    
    If the given alias already exists, the keystore information associated with it is overridden by the given key (and possibly certificate chain).
    
    Parameters:
    
    alias - the alias name
    
    key - the key (in protected format) to be associated with the alias
    
    chain - the certificate chain for the corresponding public key (only useful if the protected key is of type java.security.PrivateKey).
    
    Throws:
    
    KeyStoreException - if this operation fails.
  - engineSetCertificateEntry
```
public abstract void engineSetCertificateEntry(String alias,
                                               Certificate cert)
                                        throws KeyStoreException
```
    Assigns the given certificate to the given alias.
    If the given alias identifies an existing entry created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry, the trusted certificate in the existing entry is overridden by the given certificate.
    
    Parameters:
    
    alias - the alias name
    
    cert - the certificate
    
    Throws:
    
    KeyStoreException - if the given alias already exists and does not identify an entry containing a trusted certificate, or this operation fails for some other reason.
  - engineDeleteEntry
```
public abstract void engineDeleteEntry(String alias)
                                throws KeyStoreException
```
    Deletes the entry identified by the given alias from this keystore.
    
    Parameters:
    
    alias - the alias name
    
    Throws:
    
    KeyStoreException - if the entry cannot be removed.
  - engineAliases
```
public abstract Enumeration<String> engineAliases()
```
    Lists all the alias names of this keystore.
    
    Returns:
    
    enumeration of the alias names
  - engineContainsAlias
```
public abstract boolean engineContainsAlias(String alias)
```
    Checks if the given alias exists in this keystore.
    
    Parameters:
    
    alias - the alias name
    
    Returns:
    
    true if the alias exists, false otherwise
  - engineSize
```
public abstract int engineSize()
```
    Retrieves the number of entries in this keystore.
    
    Returns:
    
    the number of entries in this keystore
  - engineIsKeyEntry
```
public abstract boolean engineIsKeyEntry(String alias)
```
    Returns true if the entry identified by the given alias was created by a call to setKeyEntry, or created by a call to setEntry with a PrivateKeyEntry or a SecretKeyEntry.
    
    Parameters:
    
    alias - the alias for the keystore entry to be checked
    
    Returns:
    
    true if the entry identified by the given alias is a key-related, false otherwise.
  - engineIsCertificateEntry
```
public abstract boolean engineIsCertificateEntry(String alias)
```
    Returns true if the entry identified by the given alias was created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry.
    
    Parameters:
    
    alias - the alias for the keystore entry to be checked
    
    Returns:
    
    true if the entry identified by the given alias contains a trusted certificate, false otherwise.
  - engineGetCertificateAlias
```
public abstract String engineGetCertificateAlias(Certificate cert)
```
    Returns the (alias) name of the first keystore entry whose certificate matches the given certificate.
    This method attempts to match the given certificate with each keystore entry. If the entry being considered was created by a call to setCertificateEntry, or created by a call to setEntry with a TrustedCertificateEntry, then the given certificate is compared to that entry's certificate.
    
    If the entry being considered was created by a call to setKeyEntry, or created by a call to setEntry with a PrivateKeyEntry, then the given certificate is compared to the first element of that entry's certificate chain.
    
    Parameters:
    
    cert - the certificate to match with.
    
    Returns:
    
    the alias name of the first entry with matching certificate, or null if no such entry exists in this keystore.
  - engineStore
```
public abstract void engineStore(OutputStream stream,
                                 char[] password)
                          throws IOException,
                                 NoSuchAlgorithmException,
                                 CertificateException
```
    Stores this keystore to the given output stream, and protects its integrity with the given password.
    
    Parameters:
    
    stream - the output stream to which this keystore is written.
    
    password - the password to generate the keystore integrity check
    
    Throws:
    
    IOException - if there was an I/O problem with data
    
    NoSuchAlgorithmException - if the appropriate data integrity algorithm could not be found
    
    CertificateException - if any of the certificates included in the keystore data could not be stored
  - engineStore
```
public void engineStore(KeyStore.LoadStoreParameter param)
                 throws IOException,
                        NoSuchAlgorithmException,
                        CertificateException
```
    Stores this keystore using the given KeyStore.LoadStoreParmeter.
    
    Parameters:
    
    param - the KeyStore.LoadStoreParmeter that specifies how to store the keystore, which may be null
    
    Throws:
    
    IllegalArgumentException - if the given KeyStore.LoadStoreParmeter input is not recognized
    
    IOException - if there was an I/O problem with data
    
    NoSuchAlgorithmException - if the appropriate data integrity algorithm could not be found
    
    CertificateException - if any of the certificates included in the keystore data could not be stored
    
    Since:
    
    1.5
  - engineLoad
```
public abstract void engineLoad(InputStream stream,
                                char[] password)
                         throws IOException,
                                NoSuchAlgorithmException,
                                CertificateException
```
    Loads the keystore from the given input stream.
    A password may be given to unlock the keystore (e.g. the keystore resides on a hardware token device), or to check the integrity of the keystore data. If a password is not given for integrity checking, then integrity checking is not performed.
    
    Parameters:
    
    stream - the input stream from which the keystore is loaded, or null
    
    password - the password used to check the integrity of the keystore, the password used to unlock the keystore, or null
    
    Throws:
    
    IOException - if there is an I/O or format problem with the keystore data, if a password is required but not given, or if the given password was incorrect. If the error is due to a wrong password, the cause of the IOException should be an UnrecoverableKeyException
    
    NoSuchAlgorithmException - if the algorithm used to check the integrity of the keystore cannot be found
    
    CertificateException - if any of the certificates in the keystore could not be loaded
  - engineLoad
```
public void engineLoad(KeyStore.LoadStoreParameter param)
                throws IOException,
                       NoSuchAlgorithmException,
                       CertificateException
```
    Loads the keystore using the given KeyStore.LoadStoreParameter.
    Note that if this KeyStore has already been loaded, it is reinitialized and loaded again from the given parameter.
    
    Parameters:
    
    param - the KeyStore.LoadStoreParameter that specifies how to load the keystore, which may be null
    
    Throws:
    
    IllegalArgumentException - if the given KeyStore.LoadStoreParameter input is not recognized
    
    IOException - if there is an I/O or format problem with the keystore data. If the error is due to an incorrect ProtectionParameter (e.g. wrong password) the cause of the IOException should be an UnrecoverableKeyException
    
    NoSuchAlgorithmException - if the algorithm used to check the integrity of the keystore cannot be found
    
    CertificateException - if any of the certificates in the keystore could not be loaded
    
    Since:
    
    1.5
  - engineGetEntry
```
public KeyStore.Entry engineGetEntry(String alias,
                                     KeyStore.ProtectionParameter protParam)
                              throws KeyStoreException,
                                     NoSuchAlgorithmException,
                                     UnrecoverableEntryException
```
    Gets a KeyStore.Entry for the specified alias with the specified protection parameter.
    
    Parameters:
    
    alias - get the KeyStore.Entry for this alias
    
    protParam - the ProtectionParameter used to protect the Entry, which may be null
    
    Returns:
    
    the KeyStore.Entry for the specified alias, or null if there is no such entry
    
    Throws:
    
    KeyStoreException - if the operation failed
    
    NoSuchAlgorithmException - if the algorithm for recovering the entry cannot be found
    
    UnrecoverableEntryException - if the specified protParam were insufficient or invalid
    
    UnrecoverableKeyException - if the entry is a PrivateKeyEntry or SecretKeyEntry and the specified protParam does not contain the information needed to recover the key (e.g. wrong password)
    
    Since:
    
    1.5
  - engineSetEntry
```
public void engineSetEntry(String alias,
                           KeyStore.Entry entry,
                           KeyStore.ProtectionParameter protParam)
                    throws KeyStoreException
```
    Saves a KeyStore.Entry under the specified alias. The specified protection parameter is used to protect the Entry.
    If an entry already exists for the specified alias, it is overridden.
    
    Parameters:
    
    alias - save the KeyStore.Entry under this alias
    
    entry - the Entry to save
    
    protParam - the ProtectionParameter used to protect the Entry, which may be null
    
    Throws:
    
    KeyStoreException - if this operation fails
    
    Since:
    
    1.5
  - engineEntryInstanceOf
```
public boolean engineEntryInstanceOf(String alias,
                                     Class<? extends KeyStore.Entry> entryClass)
```
    Determines if the keystore Entry for the specified alias is an instance or subclass of the specified entryClass.
    
    Parameters:
    
    alias - the alias name
    
    entryClass - the entry class
    
    Returns:
    
    true if the keystore Entry for the specified alias is an instance or subclass of the specified entryClass, false otherwise
    
    Since:
    
    1.5

Class KeyStoreSpi

Constructor Summary

Constructors

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

KeyStoreSpi

Method Detail

engineGetKey

engineGetCertificateChain

engineGetCertificate

engineGetCreationDate

engineSetKeyEntry

engineSetKeyEntry

engineSetCertificateEntry

engineDeleteEntry

engineAliases

engineContainsAlias

engineSize

engineIsKeyEntry

engineIsCertificateEntry

engineGetCertificateAlias

engineStore

engineStore

engineLoad

engineLoad

engineGetEntry

engineSetEntry

engineEntryInstanceOf