http://github.com/google/tink: Tink is a small cryptographic library that provides a safe, simple, agile and fast way to accomplish some common cryptographic tasks. 
// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: proto/hkdf_prf.proto

package com.google.crypto.tink.proto;

public interface HkdfPrfParamsOrBuilder extends
    // @@protoc_insertion_point(interface_extends:google.crypto.tink.HkdfPrfParams)
    com.google.protobuf.MessageOrBuilder {

  
.google.crypto.tink.HashType hash = 1;

Returns:The enum numeric value on the wire for hash.
/**
   * <code>.google.crypto.tink.HashType hash = 1;</code>
   * @return The enum numeric value on the wire for hash.
   */
  int getHashValue();
  
.google.crypto.tink.HashType hash = 1;

Returns:The hash.
/**
   * <code>.google.crypto.tink.HashType hash = 1;</code>
   * @return The hash.
   */
  com.google.crypto.tink.proto.HashType getHash();

  
Salt, optional in RFC 5869. Using "" is equivalent to zeros of length up to
the block length of the HMac.


bytes salt = 2;

Returns:The salt.
/**
   * <pre>
   * Salt, optional in RFC 5869. Using "" is equivalent to zeros of length up to
   * the block length of the HMac.
   * </pre>
   *
   * <code>bytes salt = 2;</code>
   * @return The salt.
   */
  com.google.protobuf.ByteString getSalt();
}