private static SecretBigInteger getPrivateP384Value() {
    return SecretBigInteger.fromBigInteger(
        new BigInteger(
            "670dc60402d8a4fe52f4e552d2b71f0f81bcf195d8a71a6c7d84efb4f0e4b4a5d0f60a27c9"
                + "4caac46bdeeb79897a3ed9",
            16),
        InsecureSecretKeyAccess.get());
  }
Test vectors for Ecies. Generated by hand from the implementation here, using point from other
test vectors.
java_src/src/main/java/com/google/crypto/tink/hybrid/internal/testing/EciesAeadHkdfTestUtil.java