aeadblockcipher.html

java非对称加密的源代码

          <A HREF="../../../../org/bouncycastle/crypto/CipherParameters.html" title="interface in org.bouncycastle.crypto">CipherParameters</A>&nbsp;params)
          throws java.lang.IllegalArgumentException</PRE>
<DL>
<DD>initialise the underlying cipher. Parameter can either be an AEADParameters or a ParametersWithIV object.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>forEncryption</CODE> - true if we are setting up for encryption, false otherwise.<DD><CODE>params</CODE> - the necessary parameters for the underlying cipher to be initialised.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if the params argument is inappropriate.</DL>
</DD>
</DL>
<HR>

<A NAME="getAlgorithmName()"><!-- --></A><H3>
getAlgorithmName</H3>
<PRE>
java.lang.String <B>getAlgorithmName</B>()</PRE>
<DL>
<DD>Return the name of the algorithm.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the algorithm name.</DL>
</DD>
</DL>
<HR>

<A NAME="getUnderlyingCipher()"><!-- --></A><H3>
getUnderlyingCipher</H3>
<PRE>
<A HREF="../../../../org/bouncycastle/crypto/BlockCipher.html" title="interface in org.bouncycastle.crypto">BlockCipher</A> <B>getUnderlyingCipher</B>()</PRE>
<DL>
<DD>return the cipher this object wraps.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the cipher this object wraps.</DL>
</DD>
</DL>
<HR>

<A NAME="processByte(byte, byte[], int)"><!-- --></A><H3>
processByte</H3>
<PRE>
int <B>processByte</B>(byte&nbsp;in,
                byte[]&nbsp;out,
                int&nbsp;outOff)
                throws <A HREF="../../../../org/bouncycastle/crypto/DataLengthException.html" title="class in org.bouncycastle.crypto">DataLengthException</A></PRE>
<DL>
<DD>encrypt/decrypt a single byte.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>in</CODE> - the byte to be processed.<DD><CODE>out</CODE> - the output buffer the processed byte goes into.<DD><CODE>outOff</CODE> - the offset into the output byte array the processed data starts at.
<DT><B>Returns:</B><DD>the number of bytes written to out.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/bouncycastle/crypto/DataLengthException.html" title="class in org.bouncycastle.crypto">DataLengthException</A></CODE> - if the output buffer is too small.</DL>
</DD>
</DL>
<HR>

<A NAME="processBytes(byte[], int, int, byte[], int)"><!-- --></A><H3>
processBytes</H3>
<PRE>
int <B>processBytes</B>(byte[]&nbsp;in,
                 int&nbsp;inOff,
                 int&nbsp;len,
                 byte[]&nbsp;out,
                 int&nbsp;outOff)
                 throws <A HREF="../../../../org/bouncycastle/crypto/DataLengthException.html" title="class in org.bouncycastle.crypto">DataLengthException</A></PRE>
<DL>
<DD>process a block of bytes from in putting the result into out.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>in</CODE> - the input byte array.<DD><CODE>inOff</CODE> - the offset into the in array where the data to be processed starts.<DD><CODE>len</CODE> - the number of bytes to be processed.<DD><CODE>out</CODE> - the output buffer the processed bytes go into.<DD><CODE>outOff</CODE> - the offset into the output byte array the processed data starts at.
<DT><B>Returns:</B><DD>the number of bytes written to out.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/bouncycastle/crypto/DataLengthException.html" title="class in org.bouncycastle.crypto">DataLengthException</A></CODE> - if the output buffer is too small.</DL>
</DD>
</DL>
<HR>

<A NAME="doFinal(byte[], int)"><!-- --></A><H3>
doFinal</H3>
<PRE>
int <B>doFinal</B>(byte[]&nbsp;out,
            int&nbsp;outOff)
            throws java.lang.IllegalStateException,
                   <A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></PRE>
<DL>
<DD>Finish the operation either appending or verifying the MAC at the end of the data.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>out</CODE> - space for any resulting output data.<DD><CODE>outOff</CODE> - offset into out to start copying the data at.
<DT><B>Returns:</B><DD>number of bytes written into out.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalStateException</CODE> - if the cipher is in an inappropriate state.
<DD><CODE><A HREF="../../../../org/bouncycastle/crypto/InvalidCipherTextException.html" title="class in org.bouncycastle.crypto">InvalidCipherTextException</A></CODE> - if the MAC fails to match.</DL>
</DD>
</DL>
<HR>

<A NAME="getMac()"><!-- --></A><H3>
getMac</H3>
<PRE>
byte[] <B>getMac</B>()</PRE>
<DL>
<DD>Return the value of the MAC associated with the last stream processed.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>MAC for plaintext data.</DL>
</DD>
</DL>
<HR>

<A NAME="getUpdateOutputSize(int)"><!-- --></A><H3>
getUpdateOutputSize</H3>
<PRE>
int <B>getUpdateOutputSize</B>(int&nbsp;len)</PRE>
<DL>
<DD>return the size of the output buffer required for a processBytes
 an input of len bytes.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>len</CODE> - the length of the input.
<DT><B>Returns:</B><DD>the space required to accommodate a call to processBytes
 with len bytes of input.</DL>
</DD>
</DL>
<HR>

<A NAME="getOutputSize(int)"><!-- --></A><H3>
getOutputSize</H3>
<PRE>
int <B>getOutputSize</B>(int&nbsp;len)</PRE>
<DL>
<DD>return the size of the output buffer required for a processBytes plus a
 doFinal with an input of len bytes.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>len</CODE> - the length of the input.
<DT><B>Returns:</B><DD>the space required to accommodate a call to processBytes and doFinal
 with len bytes of input.</DL>
</DD>
</DL>
<HR>

<A NAME="reset()"><!-- --></A><H3>
reset</H3>
<PRE>
void <B>reset</B>()</PRE>
<DL>
<DD>Reset the cipher. After resetting the cipher is in the same state
 as it was after the last init (if there was one).
<P>
<DD><DL>
</DL>
</DD>
</DL>
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