Examples with DATA_BLOB com.sun.jna.platform.win32.WinCrypt.DATA_BLOB used on opensource projects

Example 1 with DATA_BLOB

use of com.sun.jna.platform.win32.WinCrypt.DATA_BLOB in project jna by java-native-access.

the class Crypt32Test method testCryptProtectUnprotectData.

public void testCryptProtectUnprotectData() {
    DATA_BLOB pDataIn = new DATA_BLOB("hello world");
    DATA_BLOB pDataEncrypted = new DATA_BLOB();
    try {
        assertTrue("CryptProtectData(Initial)", Crypt32.INSTANCE.CryptProtectData(pDataIn, "description", null, null, null, 0, pDataEncrypted));
        PointerByReference pDescription = new PointerByReference();
        try {
            DATA_BLOB pDataDecrypted = new DATA_BLOB();
            try {
                assertTrue("CryptProtectData(Crypt)", Crypt32.INSTANCE.CryptUnprotectData(pDataEncrypted, pDescription, null, null, null, 0, pDataDecrypted));
                assertEquals("description", pDescription.getValue().getWideString(0));
                assertEquals("hello world", pDataDecrypted.pbData.getString(0));
            } finally {
                Kernel32Util.freeLocalMemory(pDataDecrypted.pbData);
            }
        } finally {
            Kernel32Util.freeLocalMemory(pDescription.getValue());
        }
    } finally {
        Kernel32Util.freeLocalMemory(pDataEncrypted.pbData);
    }
}

Example 2 with DATA_BLOB

use of com.sun.jna.platform.win32.WinCrypt.DATA_BLOB in project jna by java-native-access.

the class Crypt32Util method cryptProtectData.

/**
     * Protect a blob of data.
     * @param data
     *  Data to protect.
     * @param entropy
     *  Optional entropy.
     * @param flags
     *  Optional flags.
     * @param description
     *  Optional description.
     * @param prompt
     *  Prompt structure.
     * @return
     *  Protected bytes.
     */
public static byte[] cryptProtectData(byte[] data, byte[] entropy, int flags, String description, CRYPTPROTECT_PROMPTSTRUCT prompt) {
    DATA_BLOB pDataIn = new DATA_BLOB(data);
    DATA_BLOB pDataProtected = new DATA_BLOB();
    DATA_BLOB pEntropy = (entropy == null) ? null : new DATA_BLOB(entropy);
    try {
        if (!Crypt32.INSTANCE.CryptProtectData(pDataIn, description, pEntropy, null, prompt, flags, pDataProtected)) {
            throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
        }
        return pDataProtected.getData();
    } finally {
        if (pDataProtected.pbData != null) {
            Kernel32Util.freeLocalMemory(pDataProtected.pbData);
        }
    }
}

Example 3 with DATA_BLOB

use of com.sun.jna.platform.win32.WinCrypt.DATA_BLOB in project jna by java-native-access.

the class Crypt32Util method cryptUnprotectData.

/**
     * Unprotect a blob of data.
     * @param data
     *  Data to unprotect.
     * @param entropy
     *  Optional entropy.
     * @param flags
     *  Optional flags.
     * @param prompt
     *  Optional prompt structure.
     * @return
     *  Unprotected blob of data.
     */
public static byte[] cryptUnprotectData(byte[] data, byte[] entropy, int flags, CRYPTPROTECT_PROMPTSTRUCT prompt) {
    DATA_BLOB pDataIn = new DATA_BLOB(data);
    DATA_BLOB pDataUnprotected = new DATA_BLOB();
    DATA_BLOB pEntropy = (entropy == null) ? null : new DATA_BLOB(entropy);
    PointerByReference pDescription = new PointerByReference();
    Win32Exception err = null;
    byte[] unProtectedData = null;
    try {
        if (!Crypt32.INSTANCE.CryptUnprotectData(pDataIn, pDescription, pEntropy, null, prompt, flags, pDataUnprotected)) {
            err = new Win32Exception(Kernel32.INSTANCE.GetLastError());
        } else {
            unProtectedData = pDataUnprotected.getData();
        }
    } finally {
        if (pDataUnprotected.pbData != null) {
            try {
                Kernel32Util.freeLocalMemory(pDataUnprotected.pbData);
            } catch (Win32Exception e) {
                if (err == null) {
                    err = e;
                } else {
                    err.addSuppressed(e);
                }
            }
        }
        if (pDescription.getValue() != null) {
            try {
                Kernel32Util.freeLocalMemory(pDescription.getValue());
            } catch (Win32Exception e) {
                if (err == null) {
                    err = e;
                } else {
                    err.addSuppressed(e);
                }
            }
        }
    }
    if (err != null) {
        throw err;
    }
    return unProtectedData;
}

Example 4 with DATA_BLOB

use of com.sun.jna.platform.win32.WinCrypt.DATA_BLOB in project jna by java-native-access.

the class Crypt32Test method testCryptProtectUnprotectDataWithEntropy.

public void testCryptProtectUnprotectDataWithEntropy() {
    DATA_BLOB pDataIn = new DATA_BLOB("hello world");
    DATA_BLOB pEntropy = new DATA_BLOB("entropy");
    DATA_BLOB pDataEncrypted = new DATA_BLOB();
    try {
        assertTrue("CryptProtectData(Initial)", Crypt32.INSTANCE.CryptProtectData(pDataIn, "description", pEntropy, null, null, 0, pDataEncrypted));
        PointerByReference pDescription = new PointerByReference();
        try {
            DATA_BLOB pDataDecrypted = new DATA_BLOB();
            try {
                // can't decrypt without entropy
                assertFalse("CryptUnprotectData(NoEntropy)", Crypt32.INSTANCE.CryptUnprotectData(pDataEncrypted, pDescription, null, null, null, 0, pDataDecrypted));
                // decrypt with entropy
                assertTrue("CryptUnprotectData(WithEntropy)", Crypt32.INSTANCE.CryptUnprotectData(pDataEncrypted, pDescription, pEntropy, null, null, 0, pDataDecrypted));
                assertEquals("description", pDescription.getValue().getWideString(0));
                assertEquals("hello world", pDataDecrypted.pbData.getString(0));
            } finally {
                Kernel32Util.freeLocalMemory(pDataDecrypted.pbData);
            }
        } finally {
            Kernel32Util.freeLocalMemory(pDescription.getValue());
        }
    } finally {
        Kernel32Util.freeLocalMemory(pDataEncrypted.pbData);
    }
}