Confidential Computing API C++ Client Library

An idiomatic C++ client library for the Confidential Computing API, a service to create challenges and verify attestation responses.

While this library is GA, please note that the Google Cloud C++ client libraries do not follow Semantic Versioning.


The following shows the code that you'll run in the google/cloud/confidentialcomputing/quickstart/ directory, which should give you a taste of the Confidential Computing API C++ client library API.

#include "google/cloud/confidentialcomputing/v1/confidential_computing_client.h"
#include "google/cloud/project.h"
#include <iostream>

int main(int argc, char* argv[]) try {
  if (argc != 3) {
    std::cerr << "Usage: " << argv[0] << " project-id location-id\n";
    return 1;

  namespace confidentialcomputing = ::google::cloud::confidentialcomputing_v1;
  auto client = confidentialcomputing::ConfidentialComputingClient(

  //  auto const project = google::cloud::Project(argv[1]);
  auto const parent =
      std::string{"projects/"} + argv[1] + "/locations/" + argv[2];
  auto result = client.CreateChallenge(parent, {});
  if (!result) throw std::move(result).status();
  std::cout << result->DebugString() << "\n";

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;

Main classes

The main class in this library is confidentialcomputing_v1::ConfidentialComputingClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock confidentialcomputing_v1::ConfidentialComputingClient when testing your application.

Retry, Backoff, and Idempotency Policies.

The library automatically retries requests that fail with transient errors, and uses exponential backoff to backoff between retries. Application developers can override the default policies.

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