Python 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/python
$ bazel build ...

You can then encrypt a file:

$ echo "some data" > testdata.txt
$ ./bazel-bin/hybrid/hybrid --mode encrypt \
    --keyset_path hybrid_test_public_keyset.json \
    --input_path testdata.txt --output_path testdata.txt.encrypted

Or decrypt the file with:

$ ./bazel-bin/hybrid/hybrid --mode decrypt \
    --keyset_path hybrid_test_private_keyset.json \
    --input_path testdata.txt.encrypted --output_path testdata.txt.decrypted
$ diff testdata.txt testdata.txt.decrypted