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/* Copyright (c) 2010 Daniel Doubrovkine, All Rights Reserved
 *
 * The contents of this file is dual-licensed under 2 
 * alternative Open Source/Free licenses: LGPL 2.1 or later and 
 * Apache License 2.0. (starting with JNA version 4.0.0).
 * 
 * You can freely decide which license you want to apply to 
 * the project.
 * 
 * You may obtain a copy of the LGPL License at:
 * 
 * http://www.gnu.org/licenses/licenses.html
 * 
 * A copy is also included in the downloadable source code package
 * containing JNA, in file "LGPL2.1".
 * 
 * You may obtain a copy of the Apache License at:
 * 
 * http://www.apache.org/licenses/
 * 
 * A copy is also included in the downloadable source code package
 * containing JNA, in file "AL2.0".
 */
package com.sun.jna.platform.win32;

import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.platform.win32.WinCrypt.CRYPTPROTECT_PROMPTSTRUCT;
import com.sun.jna.platform.win32.WinCrypt.DATA_BLOB;
import com.sun.jna.ptr.PointerByReference;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

/**
 * Crypt32.dll Interface.
 * @author dblock[at]dblock.org
 */
public interface Crypt32 extends StdCallLibrary {

	Crypt32 INSTANCE = Native.loadLibrary("Crypt32", Crypt32.class, W32APIOptions.DEFAULT_OPTIONS);

	/**
	 * The CryptProtectData function performs encryption on the data in a DATA_BLOB
	 * structure. Typically, only a user with the same logon credential as the encrypter
	 * can decrypt the data. In addition, the encryption and decryption usually must be
	 * done on the same computer.
	 * @param pDataIn
	 *  Pointer to a DATA_BLOB structure that contains the plaintext to be encrypted.
	 * @param szDataDescr
	 *  String with a readable description of the data to be encrypted. This description
	 *  string is included with the encrypted data. This parameter is optional and can
	 *  be set to NULL, except on Windows 2000.
	 * @param pOptionalEntropy
	 *  Pointer to a DATA_BLOB structure that contains a password or other additional
	 *  entropy used to encrypt the data. The DATA_BLOB structure used in the encryption
	 *  phase must also be used in the decryption phase. This parameter can be set to NULL
	 *  for no additional entropy.
	 * @param pvReserved
	 *  Reserved for future use and must be set to NULL.
	 * @param pPromptStruct
	 *  Pointer to a CRYPTPROTECT_PROMPTSTRUCT structure that provides information about
	 *  where and when prompts are to be displayed and what the content of those prompts
	 *  should be. This parameter can be set to NULL in both the encryption and decryption
	 *  phases.
	 * @param dwFlags
	 *  One of CRYPTPROTECT_LOCAL_MACHINE, CRYPTPROTECT_UI_FORBIDDEN, CRYPTPROTECT_AUDIT,
	 *  CRYPTPROTECT_VERIFY_PROTECTION.
	 * @param pDataOut
	 *  Pointer to a DATA_BLOB structure that receives the encrypted data. When you have
	 *  finished using the DATA_BLOB structure, free its pbData member by calling the
	 *  LocalFree function.
	 * @return
	 *  If the function succeeds, the function returns TRUE. If the function fails,
	 *  it returns FALSE. For extended error information, call GetLastError.
	 */
	public boolean CryptProtectData(DATA_BLOB pDataIn, String szDataDescr,
			DATA_BLOB pOptionalEntropy, Pointer pvReserved,
			CRYPTPROTECT_PROMPTSTRUCT pPromptStruct,
			int dwFlags,
			DATA_BLOB pDataOut);

	/**
	 * The CryptUnprotectData function decrypts and does an integrity check of the data in
	 * a DATA_BLOB structure. Usually, only a user with the same logon credentials as the
	 * encrypter can decrypt the data. In addition, the encryption and decryption must be
	 * done on the same computer.
	 * @param pDataIn
	 *  Pointer to a DATA_BLOB structure that holds the encrypted data. The DATA_BLOB
	 *  structure's cbData member holds the length of the pbData member's byte string that
	 *  contains the text to be encrypted.
	 * @param szDataDescr
	 *  Pointer to a string-readable description of the encrypted data included with the
	 *  encrypted data. This parameter can be set to NULL. When you have finished using
	 *  ppszDataDescr, free it by calling the LocalFree function.
	 * @param pOptionalEntropy
	 *  Pointer to a DATA_BLOB structure that contains a password or other additional
	 *  entropy used when the data was encrypted. This parameter can be set to NULL;
	 *  however, if an optional entropy DATA_BLOB structure was used in the encryption
	 *  phase, that same DATA_BLOB structure must be used for the decryption phase.
	 * @param pvReserved
	 *  Reserved for future use; must be set to NULL.
	 * @param pPromptStruct
	 *  Pointer to a CRYPTPROTECT_PROMPTSTRUCT structure that provides information about
	 *  where and when prompts are to be displayed and what the content of those prompts
	 *  should be. This parameter can be set to NULL.
 	 * @param dwFlags
	 *  DWORD value that specifies options for this function. This parameter can be zero,
	 *  in which case no option is set, or CRYPTPROTECT_UI_FORBIDDEN.
	 * @param pDataOut
	 *  Pointer to a DATA_BLOB structure where the function stores the decrypted data.
	 *  When you have finished using the DATA_BLOB structure, free its pbData member by
	 *  calling the LocalFree function.
	 * @return
	 *  If the function succeeds, the return value is TRUE. If the function fails, the
	 *  return value is FALSE.
	 */
	public boolean CryptUnprotectData(DATA_BLOB pDataIn, PointerByReference szDataDescr,
			DATA_BLOB pOptionalEntropy, Pointer pvReserved,
			CRYPTPROTECT_PROMPTSTRUCT pPromptStruct,
			int dwFlags,
			DATA_BLOB pDataOut);

	/**
	 * The CertAddEncodedCertificateToSystemStore function opens the specified
	 * system store and adds the encoded certificate to it.
	 *
	 * @param szCertStoreName
	 *            A null-terminated string that contains the name of the system
	 *            store for the encoded certificate.
	 * @param pbCertEncoded
	 *            A pointer to a buffer that contains the encoded certificate to
	 *            add.
	 * @param cbCertEncoded
	 *            The size, in bytes, of the pbCertEncoded buffer.
	 * @return If the function succeeds, the return value is TRUE.

	 *         If the function fails, the return value is FALSE.

	 *         CertAddEncodedCertificateToSystemStore depends on the functions
	 *         listed in the following remarks for error handling. 

	 *         Refer to those function topics for their respective error
	 *         handling behaviors.

	 *         For extended error information, call GetLastError.
	 * @see MSDN
	 */
	boolean CertAddEncodedCertificateToSystemStore(String szCertStoreName, Pointer pbCertEncoded, int cbCertEncoded);
}