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package javax.crypto.spec;

This class specifies the source for encoding input P in OAEP Padding, as defined in the PKCS #1 standard.
PKCS1PSourceAlgorithms    ALGORITHM-IDENTIFIER ::= {
  { OID id-pSpecified PARAMETERS OCTET STRING },
  ...  -- Allows for future expansion --
}
Author:Valerie Peng
Since:1.5
/** * This class specifies the source for encoding input P in OAEP Padding, * as defined in the * <a href="http://www.ietf.org/rfc/rfc3447.txt">PKCS #1</a> * standard. * <pre> * PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { * { OID id-pSpecified PARAMETERS OCTET STRING }, * ... -- Allows for future expansion -- * } * </pre> * @author Valerie Peng * * @since 1.5 */
public class PSource { private String pSrcName;
Constructs a source of the encoding input P for OAEP padding as defined in the PKCS #1 standard using the specified PSource algorithm.
Params:
  • pSrcName – the algorithm for the source of the encoding input P.
Throws:
/** * Constructs a source of the encoding input P for OAEP * padding as defined in the PKCS #1 standard using the * specified PSource algorithm. * @param pSrcName the algorithm for the source of the * encoding input P. * @exception NullPointerException if <code>pSrcName</code> * is null. */
protected PSource(String pSrcName) { if (pSrcName == null) { throw new NullPointerException("pSource algorithm is null"); } this.pSrcName = pSrcName; }
Returns the PSource algorithm name.
Returns:the PSource algorithm name.
/** * Returns the PSource algorithm name. * * @return the PSource algorithm name. */
public String getAlgorithm() { return pSrcName; }
This class is used to explicitly specify the value for encoding input P in OAEP Padding.
Since:1.5
/** * This class is used to explicitly specify the value for * encoding input P in OAEP Padding. * * @since 1.5 */
public static final class PSpecified extends PSource { private byte[] p = new byte[0];
The encoding input P whose value equals byte[0].
/** * The encoding input P whose value equals byte[0]. */
public static final PSpecified DEFAULT = new PSpecified(new byte[0]);
Constructs the source explicitly with the specified value p as the encoding input P. Note:
Params:
  • p – the value of the encoding input. The contents of the array are copied to protect against subsequent modification.
Throws:
/** * Constructs the source explicitly with the specified * value <code>p</code> as the encoding input P. * Note: * @param p the value of the encoding input. The contents * of the array are copied to protect against subsequent * modification. * @exception NullPointerException if <code>p</code> is null. */
public PSpecified(byte[] p) { super("PSpecified"); this.p = p.clone(); }
Returns the value of encoding input P.
Returns:the value of encoding input P. A new array is returned each time this method is called.
/** * Returns the value of encoding input P. * @return the value of encoding input P. A new array is * returned each time this method is called. */
public byte[] getValue() { return (p.length==0? p: p.clone()); } } }