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<A HREF="../../java/security/Security.html#removeProvider(java.lang.String)"><CODE>removeProvider(java.lang.String)</CODE></A>, 
<A HREF="../../java/security/SecurityPermission.html"><CODE>SecurityPermission</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="addProvider(java.security.Provider)"><!-- --></A><H3>
addProvider</H3>
<PRE>
public static int <B>addProvider</B>(<A HREF="../../java/security/Provider.html">Provider</A>&nbsp;provider)</PRE>
<DL>
<DD>Adds a provider to the next position available.

 <p>First, if there is a security manager, its
 <code>checkSecurityAccess</code> 
 method is called with the string
 <code>"insertProvider."+provider.getName()</code> 
 to see if it's ok to add a new provider. 
 If the default implementation of <code>checkSecurityAccess</code> 
 is used (i.e., that method is not overriden), then this will result in
 a call to the security manager's <code>checkPermission</code> method
 with a
 <code>SecurityPermission("insertProvider."+provider.getName())</code>
 permission.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>provider</CODE> - the provider to be added.<DT><B>Returns:</B><DD>the preference position in which the provider was 
 added, or -1 if the provider was not added because it is
 already installed.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/SecurityException.html">SecurityException</A></CODE> - if a security manager exists and its <code><A HREF="../../java/lang/SecurityManager.html#checkSecurityAccess(java.lang.String)"><CODE>SecurityManager.checkSecurityAccess(java.lang.String)</CODE></A></code> method
          denies access to add a new provider<DT><B>See Also: </B><DD><A HREF="../../java/security/Security.html#getProvider(java.lang.String)"><CODE>getProvider(java.lang.String)</CODE></A>, 
<A HREF="../../java/security/Security.html#removeProvider(java.lang.String)"><CODE>removeProvider(java.lang.String)</CODE></A>, 
<A HREF="../../java/security/SecurityPermission.html"><CODE>SecurityPermission</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="removeProvider(java.lang.String)"><!-- --></A><H3>
removeProvider</H3>
<PRE>
public static void <B>removeProvider</B>(<A HREF="../../java/lang/String.html">String</A>&nbsp;name)</PRE>
<DL>
<DD>Removes the provider with the specified name.

 <p>When the specified provider is removed, all providers located
 at a position greater than where the specified provider was are shifted
 down one position (towards the head of the list of installed
 providers).

 <p>This method returns silently if the provider is not installed.
 
 <p>First, if there is a security manager, its
 <code>checkSecurityAccess</code> 
 method is called with the string <code>"removeProvider."+name</code> 
 to see if it's ok to remove the provider. 
 If the default implementation of <code>checkSecurityAccess</code> 
 is used (i.e., that method is not overriden), then this will result in
 a call to the security manager's <code>checkPermission</code> method
 with a <code>SecurityPermission("removeProvider."+name)</code>
 permission.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the provider to remove.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/SecurityException.html">SecurityException</A></CODE> - if a security manager exists and its <code><A HREF="../../java/lang/SecurityManager.html#checkSecurityAccess(java.lang.String)"><CODE>SecurityManager.checkSecurityAccess(java.lang.String)</CODE></A></code> method
          denies
          access to remove the provider<DT><B>See Also: </B><DD><A HREF="../../java/security/Security.html#getProvider(java.lang.String)"><CODE>getProvider(java.lang.String)</CODE></A>, 
<A HREF="../../java/security/Security.html#addProvider(java.security.Provider)"><CODE>addProvider(java.security.Provider)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getProviders()"><!-- --></A><H3>
getProviders</H3>
<PRE>
public static <A HREF="../../java/security/Provider.html">Provider</A>[] <B>getProviders</B>()</PRE>
<DL>
<DD>Returns an array containing all the installed providers. The order of
 the providers in the array is their preference order.<DD><DL>
<DT><B>Returns:</B><DD>an array of all the installed providers.</DL>
</DD>
</DL>
<HR>

<A NAME="getProvider(java.lang.String)"><!-- --></A><H3>
getProvider</H3>
<PRE>
public static <A HREF="../../java/security/Provider.html">Provider</A> <B>getProvider</B>(<A HREF="../../java/lang/String.html">String</A>&nbsp;name)</PRE>
<DL>
<DD>Returns the provider installed with the specified name, if
 any. Returns null if no provider with the speicified name is
 installed.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - the name of the provider to get.<DT><B>Returns:</B><DD>the provider of the specified name.<DT><B>See Also: </B><DD><A HREF="../../java/security/Security.html#removeProvider(java.lang.String)"><CODE>removeProvider(java.lang.String)</CODE></A>, 
<A HREF="../../java/security/Security.html#addProvider(java.security.Provider)"><CODE>addProvider(java.security.Provider)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getProviders(java.lang.String)"><!-- --></A><H3>
getProviders</H3>
<PRE>
public static <A HREF="../../java/security/Provider.html">Provider</A>[] <B>getProviders</B>(<A HREF="../../java/lang/String.html">String</A>&nbsp;filter)</PRE>
<DL>
<DD>Returns an array containing all installed providers that satisfy the
 specified selection criterion, or null if no such providers have been
 installed. The returned providers are ordered
 according to their <a href=
 "#insertProviderAt(java.security.Provider, int)">preference order</a>. 
 
 <p> A cryptographic service is always associated with a particular
 algorithm or type. For example, a digital signature service is
 always associated with a particular algorithm (e.g., DSA),
 and a CertificateFactory service is always associated with
 a particular certificate type (e.g., X.509).

 <p>The selection criterion must be specified in one of the following two formats:
 <ul>
 <li> <i>&lt;crypto_service>.&lt;algorithm_or_type></i> <p> The
 cryptographic service name must not contain any dots.
 <p> A 
 provider satisfies the specified selection criterion iff the provider implements the 
 specified algorithm or type for the specified cryptographic service.
 <p> For example, "CertificateFactory.X.509" 
 would be satisfied by any provider that supplied
 a CertificateFactory implementation for X.509 certificates.
 <li> <i>&lt;crypto_service>.&lt;algorithm_or_type> &lt;attribute_name>:&lt attribute_value></i>
 <p> The cryptographic service name must not contain any dots. There
 must be one or more space charaters between the the <i>&lt;algorithm_or_type></i>
 and the <i>&lt;attribute_name></i>.
 <p> A provider satisfies this selection criterion iff the
 provider implements the specified algorithm or type for the specified 
 cryptographic service and its implementation meets the
 constraint expressed by the specified attribute name/value pair.
 <p> For example, "Signature.SHA1withDSA KeySize:1024" would be
 satisfied by any provider that implemented
 the SHA1withDSA signature algorithm with a keysize of 1024 (or larger).
  
 </ul>

 <p> See Appendix A in the <a href=
 "../../../guide/security/CryptoSpec.html#AppA">
 Java Cryptogaphy Architecture API Specification &amp; Reference </a>
 for information about standard cryptographic service names, standard
 algorithm names and standard attribute names.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filter</CODE> - the criterion for selecting
 providers. The filter is case-insensitive.<DT><B>Returns:</B><DD>all the installed providers that satisfy the selection
 criterion, or null if no such providers have been installed.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/security/InvalidParameterException.html">InvalidParameterException</A></CODE> - if the filter is not in the required format</DL>
</DD>
</DL>
<HR>

<A NAME="getProviders(java.util.Map)"><!-- --></A><H3>
getProviders</H3>
<PRE>
public static <A HREF="../../java/security/Provider.html">Provider</A>[] <B>getProviders</B>(<A HREF="../../java/util/Map.html">Map</A>&nbsp;filter)</PRE>
<DL>
<DD>Returns an array containing all installed providers that satisfy the specified
 selection criteria, or null if no such providers have been installed. 
 The returned providers are ordered
 according to their <a href=
 "#insertProviderAt(java.security.Provider, int)">preference order</a>. 
 
 <p>The selection criteria are represented by a map.
 Each map entry represents a selection criterion. 
 A provider is selected iff it satisfies all selection
 criteria. The key for any entry in such a map must be in one of the
 following two formats:
 <ul>
 <li> <i>&lt;crypto_service>.&lt;algorithm_or_type></i>
 <p> The cryptographic service name must not contain any dots.
 <p> The value associated with the key must be an empty string.
 <p> A provider
 satisfies this selection criterion iff the provider implements the 
 specified algorithm or type for the specified cryptographic service.
 <li>  <i>&lt;crypto_service>.&lt;algorithm_or_type> &lt;attribute_name></i>
 <p> The cryptographic service name must not contain any dots. There
 must be one or more space charaters between the <i>&lt;algorithm_or_type></i>
 and the <i>&lt;attribute_name></i>.
 <p> The value associated with the key must be a non-empty string.
 A provider satisfies this selection criterion iff the
 provider implements the specified algorithm or type for the specified 
 cryptographic service and its implementation meets the
 constraint expressed by the specified attribute name/value pair. 
 </ul>

 <p> See Appendix A in the <a href=
 "../../../guide/security/CryptoSpec.html#AppA">
 Java Cryptogaphy Architecture API Specification &amp; Reference </a>
 for information about standard cryptographic service names, standard
 algorithm names and standard attribute names.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filter</CODE> - the criteria for selecting
 providers. The filter is case-insensitive.<DT><B>Returns:</B><DD>all the installed providers that satisfy the selection
 criteria, or null if no such providers have been installed.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/security/InvalidParameterException.html">InvalidParameterException</A></CODE> - if the filter is not in the required format</DL>
</DD>
</DL>
<HR>

<A NAME="getProperty(java.lang.String)"><!-- --></A><H3>
getProperty</H3>
<PRE>
public static <A HREF="../../java/lang/String.html">String</A> <B>getProperty</B>(<A HREF="../../java/lang/String.html">String</A>&nbsp;key)</PRE>
<DL>
<DD>Gets a security property value.

 <p>First, if there is a security manager, its
 <code>checkPermission</code>  method is called with a 
 <code>java.security.SecurityPermission("getProperty."+key)</code>
 permission to see if it's ok to retrieve the specified
 security property value..<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key of the property being retrieved.<DT><B>Returns:</B><DD>the value of the security property corresponding to key.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/SecurityException.html">SecurityException</A></CODE> - if a security manager exists and its <code><A HREF="../../java/lang/SecurityManager.html#checkPermission(java.security.Permission)"><CODE>SecurityManager.checkPermission(java.security.Permission)</CODE></A></code> method
          denies
          access to retrieve the specified security property value<DT><B>See Also: </B><DD><A HREF="../../java/security/SecurityPermission.html"><CODE>SecurityPermission</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="setProperty(java.lang.String, java.lang.String)"><!-- --></A><H3>
setProperty</H3>
<PRE>
public static void <B>setProperty</B>(<A HREF="../../java/lang/String.html">String</A>&nbsp;key,
                               <A HREF="../../java/lang/String.html">String</A>&nbsp;datum)</PRE>
<DL>
<DD>Sets a security property value.

 <p>First, if there is a security manager, its
 <code>checkPermission</code> method is called with a 
 <code>java.security.SecurityPermission("setProperty."+key)</code>
 permission to see if it's ok to set the specified
 security property value.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>key</CODE> - the name of the property to be set.<DD><CODE>datum</CODE> - the value of the property to be set.<DT><B>Throws:</B><DD><CODE><A HREF="../../java/lang/SecurityException.html">SecurityException</A></CODE> - if a security manager exists and its <code><A HREF="../../java/lang/SecurityManager.html#checkPermission(java.security.Permission)"><CODE>SecurityManager.checkPermission(java.security.Permission)</CODE></A></code> method
          denies access to set the specified security property value<DT><B>See Also: </B><DD><A HREF="../../java/security/SecurityPermission.html"><CODE>SecurityPermission</CODE></A></DL>
</DD>
</DL>
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