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<TITLE>Getting the Bytes of a Generated Symmetric Key
(Java Developers Almanac Example)
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<B><A HREF="../javax.crypto/pkg.html">javax.crypto</A></B><font color="#666666" SIZE="-2">
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<B><A HREF="../javax.crypto/pkg.html#Symmetric%20Keys">Symmetric Keys</A></B><font color="#666666" SIZE="-2">
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<h3>
e460.
Getting the Bytes of a Generated Symmetric Key</h3>
<pre>
try {
// Generate a key
KeyGenerator keyGen = KeyGenerator.getInstance(<font color="#0066ff"><i>"DESede"</i></font>);
SecretKey key = keyGen.generateKey();
// Get the bytes of the key
byte[] keyBytes = key.getEncoded();
int numBytes = keyBytes.length;
// The bytes can be converted back to a SecretKey
SecretKey key2 = new SecretKeySpec(keyBytes, <font color="#0066ff"><i>"DESede"</i></font>);
boolean b = key.equals(key2); // true
} catch (NoSuchAlgorithmException e) {
}
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Related Examples
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e458. <a class="eglink" href="ListKeyGen.html?l=rel">
Listing All Available Symmetric Key Generators
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e459. <a class="eglink" href="GenKey.html?l=rel">
Generating a Symmetric Key
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See also:
<a class="eglink" href="/egs/javax.crypto/pkg.html?l=rel#Encrypting%20and%20Decrypting">
Encrypting and Decrypting
</a>
<a class="eglink" href="/egs/javax.crypto/pkg.html?l=rel#Key%20Agreement">
Key Agreement
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<a class="eglink" href="/egs/javax.crypto/pkg.html?l=rel#MAC">
MAC
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