Question

我正在尝试使用BouncyCastle使用PGPEncryption加密文件。当我将加密数据格式化为AsciiArmored时，解密也正常。

但是当我禁用AsciiArmored时，它会产生大约12kb的文件[加密格式化]。我尝试用相同的代码解密相同的代码，它现在抛出错误

java.io.IOException: Stream closed
at java.io.BufferedInputStream.getInIfOpen(Unknown Source)
at java.io.BufferedInputStream.available(Unknown Source)
at org.bouncycastle.openpgp.PGPUtil$BufferedInputStreamExt.available(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream.available(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream$PartialInputStream.available(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream.available(Unknown Source)
at java.io.FilterInputStream.available(Unknown Source)
at org.bouncycastle.crypto.io.CipherInputStream.nextChunk(Unknown Source)
at org.bouncycastle.crypto.io.CipherInputStream.read(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream.read(Unknown Source)
at org.bouncycastle.openpgp.PGPEncryptedData$TruncatedStream.read(Unknown Source)
at java.io.InputStream.read(Unknown Source)
at org.bouncycastle.util.io.TeeInputStream.read(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream.read(Unknown Source)
at org.bouncycastle.openpgp.PGPCompressedData$1.fill(Unknown Source)
at java.util.zip.InflaterInputStream.read(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream.read(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream$PartialInputStream.read(Unknown Source)
at org.bouncycastle.bcpg.BCPGInputStream.read(Unknown Source)
at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at java.io.BufferedReader.fill(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)

测试类：

public void testDecrypt() throws Exception {
        this.pgpFileProcessor.setPassphrase(PASSPHRASE);
        this.pgpFileProcessor.setSecretKeyFileName(PRI_KEY_FILE);
        this.pgpFileProcessor.setAsciiArmored(false);

        this.pgpFileProcessor.setInputFileName(OUTPUT);
        this.pgpFileProcessor.setOutputFileName(TEMP_SG);
        InputStream is = this.pgpFileProcessor.decryptToStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(is));

        StringBuilder sb = new StringBuilder();

        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line + "\n");
        }

        System.out.println(sb.toString());

        br.close();
        is.close();
    }

Util class

public InputStream decryptToStream() throws Exception {
    FileInputStream in = new FileInputStream(this.inputFileName);
    FileInputStream keyIn = new FileInputStream(this.secretKeyFileName);
    InputStream inputStream = this.pgpUtils.decryptFile(in, keyIn, this.passphrase.toCharArray());
    in.close();
    keyIn.close();
    return inputStream;
}

实际代码：

public InputStream decryptFile(InputStream in, InputStream keyIn, char[] passwd) throws Exception {
    InputStream decryptedData = null;

    Security.addProvider(new BouncyCastleProvider());
    in = org.bouncycastle.openpgp.PGPUtil.getDecoderStream(in);
    PGPObjectFactory pgpF = new PGPObjectFactory(in);
    PGPEncryptedDataList enc;

    Object o = pgpF.nextObject();
    if (o instanceof PGPEncryptedDataList) {
        enc = (PGPEncryptedDataList) o;
    } else {
        enc = (PGPEncryptedDataList) pgpF.nextObject();
    }

    Iterator<PGPPublicKeyEncryptedData> it = enc.getEncryptedDataObjects();
    PGPPrivateKey sKey = null;
    PGPPublicKeyEncryptedData pbe = null;

    while (sKey == null && it.hasNext()) {
        pbe = it.next();

        sKey = findPrivateKey(keyIn, pbe.getKeyID(), passwd);
    }

    if (sKey == null) {
        in.close();
        throw new IllegalArgumentException("Secret key for message not found.");
    }
    if (pbe == null) {
        in.close();
        throw new IllegalArgumentException("Encrypted Data is Malformed");
    }

    InputStream clear = pbe.getDataStream(new BcPublicKeyDataDecryptorFactory(sKey));

    PGPObjectFactory plainFact = new PGPObjectFactory(clear);

    Object message = plainFact.nextObject();

    if (message instanceof PGPCompressedData) {
        PGPCompressedData cData = (PGPCompressedData) message;
        PGPObjectFactory pgpFact = new PGPObjectFactory(cData.getDataStream());

        message = pgpFact.nextObject();
    }

    if (message instanceof PGPLiteralData) {
        PGPLiteralData ld = (PGPLiteralData) message;

        decryptedData = ld.getInputStream();
        /*
         * int ch; while ((ch = unc.read()) >= 0) { out.write(ch); }
         */

    } else if (message instanceof PGPOnePassSignatureList) {
        in.close();
        clear.close();
        throw new PGPException("Encrypted message contains a signed message - not literal data.");
    } else {
        in.close();
        clear.close();
        throw new PGPException("Message is not a simple encrypted file - type unknown.");
    }
    if (pbe.isIntegrityProtected()) {
        if (!pbe.verify()) {
            in.close();
            clear.close();
            throw new PGPException("Message failed integrity check");
        }
    }
    clear.close();
    in.close();
    return decryptedData;
}

Answer 1

您正在decryptFile()的最后一行关闭流：

in.close();
return decryptedData;

不要在那里关闭流。通常规则是：在打开它的同一方法中关闭流。该模式应如下所示：

InputStream in = null;
try {
    in = ...
    // use the stream here.
} finally {
    if (in != null) {
        in.close();
    }
}

或者如果你使用的是java 7：

try (
    InputStream in = ...; // initialize stream here

) {
    // use the stream here.
}

您不必关闭已初始化的流try ()。它会自动关闭。享受java 7！

java.io.IOException：使用BouncyCastle关闭流

1 个答案: