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| <div class="subTitle">org.apache.shiro.crypto</div> |
| <h2 title="Class SecureRandomNumberGenerator" class="title">Class SecureRandomNumberGenerator</h2> |
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| <li>org.apache.shiro.crypto.SecureRandomNumberGenerator</li> |
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| <pre>public class <a href="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.35">SecureRandomNumberGenerator</a> |
| extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html" title="interface in org.apache.shiro.crypto">RandomNumberGenerator</a></pre> |
| <div class="block">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://docs.oracle.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.</div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.1</dd> |
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| <td class="colFirst"><code>protected static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#DEFAULT_NEXT_BYTES_SIZE">DEFAULT_NEXT_BYTES_SIZE</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#SecureRandomNumberGenerator--">SecureRandomNumberGenerator</a></span>()</code> |
| <div class="block">Creates a new instance with a default backing <a href="http://docs.oracle.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.</div> |
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| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#getDefaultNextBytesSize--">getDefaultNextBytesSize</a></span>()</code> |
| <div class="block">Returns the size of the generated byte array for calls to <a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes--"><code>nextBytes()</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#getSecureRandom--">getSecureRandom</a></span>()</code> |
| <div class="block">Returns the <a href="http://docs.oracle.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.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes--">nextBytes</a></span>()</code> |
| <div class="block">Generates a byte array of fixed length filled with random data, often useful for generating salts, |
| initialization vectors or other seed data.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes-int-">nextBytes</a></span>(int numBytes)</code> |
| <div class="block">Generates a byte array of the specified length filled with random data.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#setDefaultNextBytesSize-int-">setDefaultNextBytesSize</a></span>(int defaultNextBytesSize)</code> |
| <div class="block">Sets the size of the generated byte array for calls to <a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes--"><code>nextBytes()</code></a>.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#setSecureRandom-java.security.SecureRandom-">setSecureRandom</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</a> random)</code> |
| <div class="block">Sets the <a href="http://docs.oracle.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.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#setSeed-byte:A-">setSeed</a></span>(byte[] bytes)</code> |
| <div class="block">Seeds the backing <a href="http://docs.oracle.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.</div> |
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| <a name="DEFAULT_NEXT_BYTES_SIZE"> |
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| <h4>DEFAULT_NEXT_BYTES_SIZE</h4> |
| <pre>protected static final int <a href="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.37">DEFAULT_NEXT_BYTES_SIZE</a></pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.shiro.crypto.SecureRandomNumberGenerator.DEFAULT_NEXT_BYTES_SIZE">Constant Field Values</a></dd> |
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| <a name="SecureRandomNumberGenerator--"> |
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| <h4>SecureRandomNumberGenerator</h4> |
| <pre>public <a href="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.47">SecureRandomNumberGenerator</a>()</pre> |
| <div class="block">Creates a new instance with a default backing <a href="http://docs.oracle.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.</div> |
| </li> |
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| <a name="setSeed-byte:A-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setSeed</h4> |
| <pre>public void <a href="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.58">setSeed</a>(byte[] bytes)</pre> |
| <div class="block">Seeds the backing <a href="http://docs.oracle.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.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>bytes</code> - the seed bytes</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="http://docs.oracle.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true#setSeed-byte:A-" title="class or interface in java.security"><code>SecureRandom.setSeed(byte[])</code></a></dd> |
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| <a name="getSecureRandom--"> |
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| <h4>getSecureRandom</h4> |
| <pre>public <a href="http://docs.oracle.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">getSecureRandom</a>()</pre> |
| <div class="block">Returns the <a href="http://docs.oracle.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.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the <a href="http://docs.oracle.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.</dd> |
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| <h4>setSecureRandom</h4> |
| <pre>public void <a href="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.77">setSecureRandom</a>(<a href="http://docs.oracle.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://docs.oracle.com/javase/6/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></pre> |
| <div class="block">Sets the <a href="http://docs.oracle.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.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>random</code> - the <a href="http://docs.oracle.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.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.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</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>getDefaultNextBytesSize</h4> |
| <pre>public int <a href="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.90">getDefaultNextBytesSize</a>()</pre> |
| <div class="block">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.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the size of the generated byte array for calls to <a href="../../../../org/apache/shiro/crypto/SecureRandomNumberGenerator.html#nextBytes--"><code>nextBytes()</code></a>.</dd> |
| </dl> |
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| <h4>setDefaultNextBytesSize</h4> |
| <pre>public void <a href="../../../../src-html/org/apache/shiro/crypto/SecureRandomNumberGenerator.html#line.101">setDefaultNextBytesSize</a>(int defaultNextBytesSize) |
| throws <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></pre> |
| <div class="block">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.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <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>.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.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</dd> |
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| <h4>nextBytes</h4> |
| <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">nextBytes</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes--">RandomNumberGenerator</a></code></span></div> |
| <div class="block">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.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <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></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a byte array of fixed length filled with random data.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes-int-"><code>RandomNumberGenerator.nextBytes(int)</code></a></dd> |
| </dl> |
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| <a name="nextBytes-int-"> |
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| <h4>nextBytes</h4> |
| <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">nextBytes</a>(int numBytes)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes-int-">RandomNumberGenerator</a></code></span></div> |
| <div class="block">Generates a byte array of the specified length filled with random data.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <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></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>numBytes</code> - the number of bytes to be populated with random data.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a byte array of the specified length filled with random data.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/apache/shiro/crypto/RandomNumberGenerator.html#nextBytes--"><code>RandomNumberGenerator.nextBytes()</code></a></dd> |
| </dl> |
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