Java hybrid encryption example

This example shows how to encrypt data with Tink using hybrid encryption.

It demonstrates the basic steps of using Tink, namely loading key material, obtaining a primitive, and using the primitive to do crypto.

The key material was generated with Tinkey:

tinkey create-keyset --key-template ECIES_P256_HKDF_HMAC_SHA256_AES128_GCM \
    --out-format JSON --out hybrid_test_private_keyset.json

tinkey create-public-keyset --in hybrid_test_private_keyset.json \
    --in-format JSON --out-format JSON --out hybrid_test_public_keyset.json

Build and run

Bazel

git clone https://github.com/google/tink
cd tink/examples/java_src
bazel build ...

You can then encrypt a file:

echo "some data" > testdata.txt
./bazel-bin/hybrid/hybrid_example _encrypt \
    hybrid_test_public_keyset.json testdata.txt testdata.txt.encrypted

or decrypt the file:

./bazel-bin/hybrid/hybrid_example decrypt \
    hybrid_test_public_keyset.json testdata.txt.encrypted testdata.txt.decrypted
$ diff testdata.txt testdata.txt.decrypted