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| org.apache.shiro.crypto</FONT> |
| <BR> |
| Class SecureRandomNumberGenerator</H2> |
| <PRE> |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
| <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.shiro.crypto.SecureRandomNumberGenerator</B> |
| </PRE> |
| <DL> |
| <DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html" title="interface in org.apache.shiro.crypto">RandomNumberGenerator</A></DD> |
| </DL> |
| <HR> |
| <DL> |
| <DT><PRE>public class <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.35"><B>SecureRandomNumberGenerator</B></A><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html" title="interface in org.apache.shiro.crypto">RandomNumberGenerator</A></DL> |
| </PRE> |
| |
| <P> |
| Default implementation of the <A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html" title="interface in org.apache.shiro.crypto"><CODE>RandomNumberGenerator</CODE></A> interface, backed by a |
| <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> instance. |
| <p/> |
| This class is a little easier to use than using the JDK's <code>SecureRandom</code> class directly. It also |
| allows for JavaBeans-style of customization, convenient for Shiro's INI configuration or other IoC configuration |
| mechanism. |
| <P> |
| |
| <P> |
| <DL> |
| <DT><B>Since:</B></DT> |
| <DD>1.1</DD> |
| </DL> |
| <HR> |
| |
| <P> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <A NAME="field_summary"><!-- --></A> |
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| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE>protected static int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#DEFAULT_NEXT_BYTES_SIZE">DEFAULT_NEXT_BYTES_SIZE</A></B></CODE> |
| |
| <BR> |
| </TD> |
| </TR> |
| </TABLE> |
| |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| |
| <A NAME="constructor_summary"><!-- --></A> |
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| <B>Constructor Summary</B></FONT></TH> |
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| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#SecureRandomNumberGenerator()">SecureRandomNumberGenerator</A></B>()</CODE> |
| |
| <BR> |
| Creates a new instance with a default backing <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> and a |
| <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#getDefaultNextBytesSize()"><CODE>defaultNextBytesSize</CODE></A> of <code>16</code>, which equals 128 bits, a size commonly |
| used in cryptographic algorithms.</TD> |
| </TR> |
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| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> int</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#getDefaultNextBytesSize()">getDefaultNextBytesSize</A></B>()</CODE> |
| |
| <BR> |
| Returns the size of the generated byte array for calls to <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes()"><CODE>nextBytes()</CODE></A>.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#getSecureRandom()">getSecureRandom</A></B>()</CODE> |
| |
| <BR> |
| Returns the <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> backing this instance.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> <A HREF="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes()">nextBytes</A></B>()</CODE> |
| |
| <BR> |
| Generates a byte array of fixed length filled with random data, often useful for generating salts, |
| initialization vectors or other seed data.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> <A HREF="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</A></CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes(int)">nextBytes</A></B>(int numBytes)</CODE> |
| |
| <BR> |
| Generates a byte array of the specified length filled with random data.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> void</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#setDefaultNextBytesSize(int)">setDefaultNextBytesSize</A></B>(int defaultNextBytesSize)</CODE> |
| |
| <BR> |
| Sets the size of the generated byte array for calls to <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes()"><CODE>nextBytes()</CODE></A>.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> void</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#setSecureRandom(java.security.SecureRandom)">setSecureRandom</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</A> random)</CODE> |
| |
| <BR> |
| Sets the <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> to back this instance.</TD> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
| <CODE> void</CODE></FONT></TD> |
| <TD><CODE><B><A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#setSeed(byte[])">setSeed</A></B>(byte[] bytes)</CODE> |
| |
| <BR> |
| Seeds the backing <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> instance with additional seed data.</TD> |
| </TR> |
| </TABLE> |
| <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
| <TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH> |
| </TR> |
| <TR BGCOLOR="white" CLASS="TableRowColor"> |
| <TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> |
| </TR> |
| </TABLE> |
| |
| <P> |
| |
| <!-- ============ FIELD DETAIL =========== --> |
| |
| <A NAME="field_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Field Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="DEFAULT_NEXT_BYTES_SIZE"><!-- --></A><H3> |
| DEFAULT_NEXT_BYTES_SIZE</H3> |
| <PRE> |
| protected static final int <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.37"><B>DEFAULT_NEXT_BYTES_SIZE</B></A></PRE> |
| <DL> |
| <DL> |
| <DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.apache.shiro.crypto.SecureRandomNumberGenerator.DEFAULT_NEXT_BYTES_SIZE">Constant Field Values</A></DL> |
| </DL> |
| |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| |
| <A NAME="constructor_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Constructor Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="SecureRandomNumberGenerator()"><!-- --></A><H3> |
| SecureRandomNumberGenerator</H3> |
| <PRE> |
| public <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.47"><B>SecureRandomNumberGenerator</B></A>()</PRE> |
| <DL> |
| <DD>Creates a new instance with a default backing <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> and a |
| <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#getDefaultNextBytesSize()"><CODE>defaultNextBytesSize</CODE></A> of <code>16</code>, which equals 128 bits, a size commonly |
| used in cryptographic algorithms. |
| <P> |
| </DL> |
| |
| <!-- ============ METHOD DETAIL ========== --> |
| |
| <A NAME="method_detail"><!-- --></A> |
| <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
| <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
| <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
| <B>Method Detail</B></FONT></TH> |
| </TR> |
| </TABLE> |
| |
| <A NAME="setSeed(byte[])"><!-- --></A><H3> |
| setSeed</H3> |
| <PRE> |
| public void <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.58"><B>setSeed</B></A>(byte[] bytes)</PRE> |
| <DL> |
| <DD>Seeds the backing <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> instance with additional seed data. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>bytes</CODE> - the seed bytes<DT><B>See Also:</B><DD><A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true#setSeed(byte[])" title="class or interface in java.security"><CODE>SecureRandom.setSeed(byte[])</CODE></A></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="getSecureRandom()"><!-- --></A><H3> |
| getSecureRandom</H3> |
| <PRE> |
| public <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</A> <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.67"><B>getSecureRandom</B></A>()</PRE> |
| <DL> |
| <DD>Returns the <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> backing this instance. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>the <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> backing this instance.</DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="setSecureRandom(java.security.SecureRandom)"><!-- --></A><H3> |
| setSecureRandom</H3> |
| <PRE> |
| public void <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.77"><B>setSecureRandom</B></A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</A> random) |
| throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></PRE> |
| <DL> |
| <DD>Sets the <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> to back this instance. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>random</CODE> - the <A HREF="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><CODE>SecureRandom</CODE></A> to back this instance. |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</A></CODE> - if the method argument is null</DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="getDefaultNextBytesSize()"><!-- --></A><H3> |
| getDefaultNextBytesSize</H3> |
| <PRE> |
| public int <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.90"><B>getDefaultNextBytesSize</B></A>()</PRE> |
| <DL> |
| <DD>Returns the size of the generated byte array for calls to <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes()"><CODE>nextBytes()</CODE></A>. Defaults to |
| <code>16</code>, which equals 128 bits, a size commonly used in cryptographic algorithms. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>the size of the generated byte array for calls to <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes()"><CODE>nextBytes()</CODE></A>.</DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="setDefaultNextBytesSize(int)"><!-- --></A><H3> |
| setDefaultNextBytesSize</H3> |
| <PRE> |
| public void <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.101"><B>setDefaultNextBytesSize</B></A>(int defaultNextBytesSize) |
| throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></PRE> |
| <DL> |
| <DD>Sets the size of the generated byte array for calls to <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes()"><CODE>nextBytes()</CODE></A>. Defaults to |
| <code>16</code>, which equals 128 bits, a size commonly used in cryptographic algorithms. |
| <P> |
| <DD><DL> |
| </DL> |
| </DD> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>defaultNextBytesSize</CODE> - the size of the generated byte array for calls to <A HREF="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes()"><CODE>nextBytes()</CODE></A>. |
| <DT><B>Throws:</B> |
| <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if the argument is 0 or negative</DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="nextBytes()"><!-- --></A><H3> |
| nextBytes</H3> |
| <PRE> |
| public <A HREF="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</A> <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.108"><B>nextBytes</B></A>()</PRE> |
| <DL> |
| <DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes()">RandomNumberGenerator</A></CODE></B></DD> |
| <DD>Generates a byte array of fixed length filled with random data, often useful for generating salts, |
| initialization vectors or other seed data. The length is specified as a configuration |
| value on the underlying implementation. |
| <p/> |
| If you'd like per-invocation control the number of bytes generated, use the |
| <A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes(int)"><CODE>nextBytes(int)</CODE></A> method instead. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes()">nextBytes</A></CODE> in interface <CODE><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html" title="interface in org.apache.shiro.crypto">RandomNumberGenerator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| |
| <DT><B>Returns:</B><DD>a byte array of fixed length filled with random data.<DT><B>See Also:</B><DD><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes(int)"><CODE>RandomNumberGenerator.nextBytes(int)</CODE></A></DL> |
| </DD> |
| </DL> |
| <HR> |
| |
| <A NAME="nextBytes(int)"><!-- --></A><H3> |
| nextBytes</H3> |
| <PRE> |
| public <A HREF="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</A> <A HREF="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.112"><B>nextBytes</B></A>(int numBytes)</PRE> |
| <DL> |
| <DD><B>Description copied from interface: <CODE><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes(int)">RandomNumberGenerator</A></CODE></B></DD> |
| <DD>Generates a byte array of the specified length filled with random data. |
| <P> |
| <DD><DL> |
| <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes(int)">nextBytes</A></CODE> in interface <CODE><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html" title="interface in org.apache.shiro.crypto">RandomNumberGenerator</A></CODE></DL> |
| </DD> |
| <DD><DL> |
| <DT><B>Parameters:</B><DD><CODE>numBytes</CODE> - the number of bytes to be populated with random data. |
| <DT><B>Returns:</B><DD>a byte array of the specified length filled with random data.<DT><B>See Also:</B><DD><A HREF="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes()"><CODE>RandomNumberGenerator.nextBytes()</CODE></A></DL> |
| </DD> |
| </DL> |
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