naccachesternengine.html

java非对称加密的源代码

<PRE>
public <B>NaccacheSternEngine</B>()</PRE>
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<A NAME="init(boolean, org.bouncycastle.crypto.CipherParameters)"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>(boolean&nbsp;forEncryption,
                 <A HREF="../../../../org/bouncycastle/crypto/CipherParameters.html" title="interface in org.bouncycastle.crypto">CipherParameters</A>&nbsp;param)</PRE>
<DL>
<DD>Initializes this algorithm. Must be called before all other Functions.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#init(boolean, org.bouncycastle.crypto.CipherParameters)">init</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html" title="interface in org.bouncycastle.crypto">AsymmetricBlockCipher</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>forEncryption</CODE> - if true the cipher is initialised for 
  encryption, if false for decryption.<DD><CODE>param</CODE> - the key and other data required by the cipher.<DT><B>See Also:</B><DD><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#init(boolean, org.bouncycastle.crypto.CipherParameters)"><CODE>AsymmetricBlockCipher.init(boolean,
      org.bouncycastle.crypto.CipherParameters)</CODE></A></DL>
</DD>
</DL>
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<A NAME="setDebug(boolean)"><!-- --></A><H3>
setDebug</H3>
<PRE>
public void <B>setDebug</B>(boolean&nbsp;debug)</PRE>
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<DD><DL>
</DL>
</DD>
<DD><DL>
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</DD>
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<A NAME="getInputBlockSize()"><!-- --></A><H3>
getInputBlockSize</H3>
<PRE>
public int <B>getInputBlockSize</B>()</PRE>
<DL>
<DD>Returns the input block size of this algorithm.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#getInputBlockSize()">getInputBlockSize</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html" title="interface in org.bouncycastle.crypto">AsymmetricBlockCipher</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>maximum size for an input block.<DT><B>See Also:</B><DD><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#getInputBlockSize()"><CODE>AsymmetricBlockCipher.getInputBlockSize()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getOutputBlockSize()"><!-- --></A><H3>
getOutputBlockSize</H3>
<PRE>
public int <B>getOutputBlockSize</B>()</PRE>
<DL>
<DD>Returns the output block size of this algorithm.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#getOutputBlockSize()">getOutputBlockSize</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html" title="interface in org.bouncycastle.crypto">AsymmetricBlockCipher</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>maximum size of the output block produced by the cipher.<DT><B>See Also:</B><DD><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#getOutputBlockSize()"><CODE>AsymmetricBlockCipher.getOutputBlockSize()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="processBlock(byte[], int, int)"><!-- --></A><H3>
processBlock</H3>
<PRE>
public byte[] <B>processBlock</B>(byte[]&nbsp;in,
                           int&nbsp;inOff,
                           int&nbsp;len)
                    throws <A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></PRE>
<DL>
<DD>Process a single Block using the Naccache-Stern algorithm.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#processBlock(byte[], int, int)">processBlock</A></CODE> in interface <CODE><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html" title="interface in org.bouncycastle.crypto">AsymmetricBlockCipher</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>in</CODE> - the input data<DD><CODE>inOff</CODE> - offset into the in array where the data starts<DD><CODE>len</CODE> - the length of the block to be processed.
<DT><B>Returns:</B><DD>the resulting byte array of the encryption/decryption process.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></CODE> - data decrypts improperly.<DT><B>See Also:</B><DD><A HREF="../../../../org/bouncycastle/crypto/AsymmetricBlockCipher.html#processBlock(byte[], int, int)"><CODE>AsymmetricBlockCipher.processBlock(byte[],
      int, int)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="encrypt(java.math.BigInteger)"><!-- --></A><H3>
encrypt</H3>
<PRE>
public byte[] <B>encrypt</B>(java.math.BigInteger&nbsp;plain)</PRE>
<DL>
<DD>Encrypts a BigInteger aka Plaintext with the public key.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>plain</CODE> - The BigInteger to encrypt
<DT><B>Returns:</B><DD>The byte[] representation of the encrypted BigInteger (i.e.
         crypted.toByteArray())</DL>
</DD>
</DL>
<HR>

<A NAME="addCryptedBlocks(byte[], byte[])"><!-- --></A><H3>
addCryptedBlocks</H3>
<PRE>
public byte[] <B>addCryptedBlocks</B>(byte[]&nbsp;block1,
                               byte[]&nbsp;block2)
                        throws <A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></PRE>
<DL>
<DD>Adds the contents of two encrypted blocks mod sigma
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>block1</CODE> - the first encrypted block<DD><CODE>block2</CODE> - the second encrypted block
<DT><B>Returns:</B><DD>encrypt((block1 + block2) mod sigma)
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="processData(byte[])"><!-- --></A><H3>
processData</H3>
<PRE>
public byte[] <B>processData</B>(byte[]&nbsp;data)
                   throws <A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></PRE>
<DL>
<DD>Convenience Method for data exchange with the cipher.
 
 Determines blocksize and splits data to blocksize.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>data</CODE> - the data to be processed
<DT><B>Returns:</B><DD>the data after it went through the NaccacheSternEngine.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></CODE></DL>
</DD>
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