#Hadoop Crypto Compressor It's a simple "compressor" for hadoop (really don't compress anythig) but enable you to encrypt your data with public key "AES/CBC/PKCS5Padding"

##How to use it?

In Hadoop

It's simple, download the jar and put it in your hadoop classpath, so configure the compression codecs adding org.apache.hadoop.io.compress.crypto.CryptoCodec

Example:

<property>
   <name>io.compression.codecs</name>
   <value>org.apache.hadoop.io.compress.DefaultCodec,org.apache.hadoop.io.compress.GzipCodec,
   org.apache.hadoop.io.compress.BZip2Codec,org.apache.hadoop.io.compress.crypto.CryptoCodec</value>
</property>

So if you use CryptoCodec as codec you will need to use as config property crypto.secret.key to put your private key (you can define it in runtime)

From the command line

From the command line, you can encrypt and decrypt files using the following:

java -jar target/HadoopCryptoCompressor-0.0.1-SNAPSHOT-jar-with-dependencies.jar -e -s "password" -b 4096 test test.crypto

java -jar target/HadoopCryptoCompressor-0.0.1-SNAPSHOT-jar-with-dependencies.jar -d -s "password" -b 4096 test.crypto test.new

You can use the -h option to get more details.

In other JVM applications (Groovy Below)

//Decrypt file from S3 and consolidate in a single output stream
FileEncryptDecrypter fed = new FileEncryptDecrypter(mySecretKey)
ByteArrayOutputStream outputStream = new ByteArrayOutputStream()
s3list.objectSummaries.each {
    if(it.key.endsWith(".crypto")) {
        def obj = s3client.getObject(S3_BUCKET, it.key)
        fed.decryptFile(obj.objectContent,outputStream,1024)
    }
}