ecpublickey.html

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<TH ALIGN="left"><B>Methods inherited from interface javacard.security.<A HREF="../../javacard/security/ECKey.html" title="interface in javacard.security">ECKey</A></B></TH>
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<TD><CODE><A HREF="../../javacard/security/ECKey.html#getA(byte[], short)">getA</A>, <A HREF="../../javacard/security/ECKey.html#getB(byte[], short)">getB</A>, <A HREF="../../javacard/security/ECKey.html#getField(byte[], short)">getField</A>, <A HREF="../../javacard/security/ECKey.html#getG(byte[], short)">getG</A>, <A HREF="../../javacard/security/ECKey.html#getK()">getK</A>, <A HREF="../../javacard/security/ECKey.html#getR(byte[], short)">getR</A>, <A HREF="../../javacard/security/ECKey.html#setA(byte[], short, short)">setA</A>, <A HREF="../../javacard/security/ECKey.html#setB(byte[], short, short)">setB</A>, <A HREF="../../javacard/security/ECKey.html#setFieldF2M(short)">setFieldF2M</A>, <A HREF="../../javacard/security/ECKey.html#setFieldF2M(short, short, short)">setFieldF2M</A>, <A HREF="../../javacard/security/ECKey.html#setFieldFP(byte[], short, short)">setFieldFP</A>, <A HREF="../../javacard/security/ECKey.html#setG(byte[], short, short)">setG</A>, <A HREF="../../javacard/security/ECKey.html#setK(short)">setK</A>, <A HREF="../../javacard/security/ECKey.html#setR(byte[], short, short)">setR</A></CODE></TD>
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<A NAME="setW(byte[], short, short)"><!-- --></A><H3>
setW</H3>
<PRE>
void <B>setW</B>(byte[]&nbsp;buffer,
          short&nbsp;offset,
          short&nbsp;length)
          throws <A HREF="../../javacard/security/CryptoException.html" title="class in javacard.security">CryptoException</A></PRE>
<DL>
<DD>Sets the point of the curve comprising the public key. The point
 should be specified as an octet string as per ANSI X9.62. A specific implementation need
 not support the compressed form, but must support the uncompressed form
 of the point.

 The plain text data format is big-endian and right-aligned
 (the least significant bit is the least significant bit of last byte).
 Input parameter data is copied into the internal representation.

 <p>Note:<ul>
 <li><em>If the key object implements the </em><code>javacardx.crypto.KeyEncryption</code><em>
 interface and the </em><code>Cipher</code><em> object specified via </em><code>setKeyCipher()</code><em>
 is not </em><code>null</code><em>, the key value is decrypted using the </em><code>Cipher</code><em> object.</em>
 </ul>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>buffer</CODE> - the input buffer<DD><CODE>offset</CODE> - the offset into the input buffer at which the
                  point specification begins<DD><CODE>length</CODE> - the byte length of the point specification
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javacard/security/CryptoException.html" title="class in javacard.security">CryptoException</A></CODE> - with the following reason code:<ul>
 <li><code>CryptoException.ILLEGAL_VALUE</code> if the input parameter
 data format is incorrect, or if the input parameter data is inconsistent with the key length,
 or if input data decryption is required and fails.
 </ul></DL>
</DD>
</DL>
<HR>

<A NAME="getW(byte[], short)"><!-- --></A><H3>
getW</H3>
<PRE>
short <B>getW</B>(byte[]&nbsp;buffer,
           short&nbsp;offset)
           throws <A HREF="../../javacard/security/CryptoException.html" title="class in javacard.security">CryptoException</A></PRE>
<DL>
<DD>Returns the point of the curve comprising the public key in plain text form.
 The point is represented as an octet string in compressed or 
 uncompressed forms as per ANSI X9.62.

 The data format is big-endian and right-aligned
 (the least significant bit is the least significant bit of last byte).
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>buffer</CODE> - the output buffer<DD><CODE>offset</CODE> - the offset into the output buffer at which the
                  point specification data is to begin
<DT><B>Returns:</B><DD>the byte length of the point specification
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../javacard/security/CryptoException.html" title="class in javacard.security">CryptoException</A></CODE> - with the following reason code:<ul>
 <li><code>CryptoException.UNINITIALIZED_KEY</code> if the point of the curve
 comprising the public key has not been
 successfully initialized since the
 time the initialized state of the key was set to false.
 </ul><DT><B>See Also:</B><DD><A HREF="../../javacard/security/Key.html" title="interface in javacard.security"><CODE>Key</CODE></A></DL>
</DD>
</DL>
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