Download - Svetlin Nakov

private KeyStore loadKeyStoreFromPFXFile(String aFileName, String aKeyStorePass)
throws GeneralSecurityException, IOException {
KeyStore keyStore = KeyStore.getInstance(PKCS12_KEYSTORE_TYPE);
FileInputStream keyStoreStream = new FileInputStream(aFileName);
char[] password = aKeyStorePass.toCharArray();
keyStore.load(keyStoreStream, password);
return keyStore;
}
/**
* @return private key and certification chain corresponding to it, extracted
* from given keystore using given password to access the keystore and the same
* password to access the private key in it. The keystore is considered to have
* only one entry that contains both certification chain and the corresponding
* private key.
* If the certificate has no entries, an exception is trown. It the keystore has
* several entries, the first is used.
*/
private PrivateKeyAndCertChain getPrivateKeyAndCertChain(
KeyStore aKeyStore, String aKeyPassword)
throws GeneralSecurityException {
char[] password = aKeyPassword.toCharArray();
Enumeration aliasesEnum = aKeyStore.aliases();
if (aliasesEnum.hasMoreElements()) {
String alias = (String)aliasesEnum.nextElement();
Certificate[] certificationChain = aKeyStore.getCertificateChain(alias);
PrivateKey privateKey = (PrivateKey) aKeyStore.getKey(alias, password);
PrivateKeyAndCertChain result = new PrivateKeyAndCertChain();
result.mPrivateKey = privateKey;
result.mCertificationChain = certificationChain;
return result;
} else {
throw new KeyStoreException("The keystore is empty!");
}
}
/**
* @return Base64-encoded ASN.1 DER representation of given X.509 certification
* chain.
*/
private String encodeX509CertChainToBase64(Certificate[] aCertificationChain)
throws CertificateException {
List certList = Arrays.asList(aCertificationChain);
CertificateFactory certFactory =
CertificateFactory.getInstance(X509_CERTIFICATE_TYPE);
CertPath certPath = certFactory.generateCertPath(certList);
byte[] certPathEncoded = certPath.getEncoded(CERTIFICATION_CHAIN_ENCODING);
String base64encodedCertChain = Base64Utils.base64Encode(certPathEncoded);
return base64encodedCertChain;
}
/**
* Reads the specified file into a byte array.
*/
private byte[] readFileInByteArray(String aFileName)
throws IOException {
File file = new File(aFileName);
FileInputStream fileStream = new FileInputStream(file);
try {
int fileSize = (int) file.length();
byte[] data = new byte[fileSize];
int bytesRead = 0;
while (bytesRead < fileSize) {
bytesRead += fileStream.read(data, bytesRead, fileSize-bytesRead);
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