Hash filter plugin for Embulk

Embulk filter plugin to convert an input to a hash value.

Overview

• Plugin type: filter

Configuration

• columns: Columns to hash (array, required)
  • name: Name of input column (string, required)
  • algorithm: Hash algorithm. See also (string, default:"SHA-256")
  • secret_key: Secret key for HMAC hashing. (string, required when specifying HMAC algorithm)
  • new_name: New column name if you want to rename the column (string, default: null)

Example

filters:
  - type: hash
    columns:
    - { name: username }
    - { name: email, algorithm: SHA-512, new_name: hashed_email }
    - { name: phone_number, algorithm: HmacSHA256, secret_key: passw0rd }

Hash Algorithm

You can choose either of MessageDigest algorithm or HMAC algorithm. If you want to know all algorithms that your platform supports, run the following snippet.

for (String algorithm : java.security.Security.getAlgorithms("MessageDigest")) {
    System.out.println(algorithm);
}
for (String algorithm : java.security.Security.getAlgorithms("Mac")) {
    System.out.println(algorithm);
}

Build

$ ./gradlew gem  # -t to watch change of files and rebuild continuously