Example usage for org.apache.hadoop.fs FileEncryptionInfo getEzKeyVersionName

Introduction

In this page you can find the example usage for org.apache.hadoop.fs FileEncryptionInfo getEzKeyVersionName.

Prototype

public String getEzKeyVersionName() 

Source Link

Usage

From source file:com.mellanox.r4h.DFSClient.java

License:Apache License

/**
 * Decrypts a EDEK by consulting the KeyProvider.
 *//*from   w w  w.j  ava  2  s. co m*/
private KeyVersion decryptEncryptedDataEncryptionKey(FileEncryptionInfo feInfo) throws IOException {
    TraceScope scope = Trace.startSpan("decryptEDEK", traceSampler);
    try {
        KeyProvider provider = getKeyProvider();
        if (provider == null) {
            throw new IOException("No KeyProvider is configured, cannot access" + " an encrypted file");
        }
        EncryptedKeyVersion ekv = EncryptedKeyVersion.createForDecryption(feInfo.getKeyName(),
                feInfo.getEzKeyVersionName(), feInfo.getIV(), feInfo.getEncryptedDataEncryptionKey());
        try {
            KeyProviderCryptoExtension cryptoProvider = KeyProviderCryptoExtension
                    .createKeyProviderCryptoExtension(provider);
            return cryptoProvider.decryptEncryptedKey(ekv);
        } catch (GeneralSecurityException e) {
            throw new IOException(e);
        }
    } finally {
        scope.close();
    }
}

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