I am trying to encrypt a file with PGPEncryption using BouncyCastle. When I format the encrypted data to AsciiArmored, decryption is also working fine.
But when I disable AsciiArmored, it's generating around 12kb file [encrypted formated]. I tried to decrypt the same with same code, it's now throwing below error
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)
Test Class:
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;
}
Actual Code:
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;
}
You are closing the stream in the last line of decryptFile()
:
in.close();
return decryptedData;
Do not close stream there. Generally the rule is: close stream in the same method where you open it. The pattern should look like the following:
InputStream in = null;
try {
in = ...
// use the stream here.
} finally {
if (in != null) {
in.close();
}
}
Or if you are using java 7:
try (
InputStream in = ...; // initialize stream here
) {
// use the stream here.
}
You do not have to close the stream initialized try ()
. It will be closed automatically. Enjoy java 7!