Question

有人可以告诉我更多有关EncryptionMode.agile的信息吗？它使用什么样的算法？我只有像这样的pw protectet xlsx文件

POIFSFileSystem fs = new POIFSFileSystem();
        EncryptionInfo info = new EncryptionInfo(EncryptionMode.agile);
     // EncryptionInfo info = new EncryptionInfo(EncryptionMode.agile,  CipherAlgorithm.aes192, HashAlgorithm.sha384, -1, -1, null);

        Encryptor enc = info.getEncryptor();
        enc.confirmPassword(password);

        System.out.println("Read in an existing OOXML file ...");
        OPCPackage opc = OPCPackage.open(new File(filepathname), PackageAccess.READ_WRITE);

编辑：我正在生成一个xlsx文件，将一些testdata放入其中并加密以获得pw保护

EDIT2：这是在EncriptionInfo中。只是看看里面

...
/**
 * Prepares for encryption, using the given Encryption Mode, and
 *  all other parameters as default.
 * @see #EncryptionInfo(EncryptionMode, CipherAlgorithm,   HashAlgorithm,   int, int, ChainingMode)
 */
public EncryptionInfo(EncryptionMode encryptionMode) {
    this(encryptionMode, null, null, -1, -1, null);
}

/**
 * Constructs an EncryptionInfo from scratch
 *
 * @param encryptionMode see {@link EncryptionMode} for values, {@link EncryptionMode#cryptoAPI} is for
 *   internal use only, as it's record based
 * @param cipherAlgorithm
 * @param hashAlgorithm
 * @param keyBits
 * @param blockSize
 * @param chainingMode
 * 
 * @throws EncryptedDocumentException if the given parameters mismatch, e.g. only certain combinations
 *   of keyBits, blockSize are allowed for a given {@link CipherAlgorithm}
 */
public EncryptionInfo(
        EncryptionMode encryptionMode
      , CipherAlgorithm cipherAlgorithm
      , HashAlgorithm hashAlgorithm
      , int keyBits
      , int blockSize
      , ChainingMode chainingMode
  ) {
    versionMajor = encryptionMode.versionMajor;
    versionMinor = encryptionMode.versionMinor;
    encryptionFlags = encryptionMode.encryptionFlags;

    EncryptionInfoBuilder eib;
    try {
        eib = getBuilder(encryptionMode);
    } catch (Exception e) {
        throw new EncryptedDocumentException(e);
    }

    eib.initialize(this, cipherAlgorithm, hashAlgorithm, keyBits, blockSize, chainingMode);

    header = eib.getHeader();
    verifier = eib.getVerifier();
    decryptor = eib.getDecryptor();
    encryptor = eib.getEncryptor();
}...

这是在AgileEncyptionInfoBuilder中 ...

     @Override
public void initialize(EncryptionInfo ei, CipherAlgorithm   cipherAlgorithm, HashAlgorithm hashAlgorithm, int keyBits, int blockSize,   ChainingMode chainingMode) {
    this.info = ei;

    if (cipherAlgorithm == null) {
        cipherAlgorithm = CipherAlgorithm.aes128;
    }
    if (cipherAlgorithm == CipherAlgorithm.rc4) {
        throw new EncryptedDocumentException("RC4 must not be used with agile encryption.");
    }
    if (hashAlgorithm == null) {
        hashAlgorithm = HashAlgorithm.sha1;
    }
    if (chainingMode == null) {
        chainingMode = ChainingMode.cbc;
    }...

可能你还需要在windows上安装JCE

这是一个很好的指南： http://suhothayan.blogspot.de/2012/05/how-to-install-java-cryptography.html （只需覆盖lib \ security中的.jar，所有。在jre和jdk位置上）

或使用Bouncy Castle 并且不要使用＆＃34; VelvetSweatshop＆＃34;作为.xlsx密码：D

关于EncryptionMode.agile的更多信息

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