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/aes_gcm_hkdf_streaming.proto

package com.google.crypto.tink.proto;

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

  
uint32 ciphertext_segment_size = 1;

Returns:The ciphertextSegmentSize.
/**
   * <code>uint32 ciphertext_segment_size = 1;</code>
   * @return The ciphertextSegmentSize.
   */
  int getCiphertextSegmentSize();

  
size of AES-GCM keys derived for each segment


uint32 derived_key_size = 2;

Returns:The derivedKeySize.
/**
   * <pre>
   * size of AES-GCM keys derived for each segment
   * </pre>
   *
   * <code>uint32 derived_key_size = 2;</code>
   * @return The derivedKeySize.
   */
  int getDerivedKeySize();

  
.google.crypto.tink.HashType hkdf_hash_type = 3;

Returns:The enum numeric value on the wire for hkdfHashType.
/**
   * <code>.google.crypto.tink.HashType hkdf_hash_type = 3;</code>
   * @return The enum numeric value on the wire for hkdfHashType.
   */
  int getHkdfHashTypeValue();
  
.google.crypto.tink.HashType hkdf_hash_type = 3;

Returns:The hkdfHashType.
/**
   * <code>.google.crypto.tink.HashType hkdf_hash_type = 3;</code>
   * @return The hkdfHashType.
   */
  com.google.crypto.tink.proto.HashType getHkdfHashType();
}