An idiomatic C++ client library for theCertificate Authority API. The Certificate Authority Service API is a highly-available, scalable service that enables you to simplify and automate the management of private certificate authorities (CAs) while staying in control of your private keys.
While this library isGA, please note Google Cloud C++ client libraries donotfollowSemantic Versioning.
Quickstart
The following shows the code that you'll run in thegoogle/cloud/privateca/quickstart/directory, which should give you a taste of the Certificate Authority API C++ client library API.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThis page provides documentation for the Certificate Authority API C++ client library, which is designed for managing private certificate authorities.\u003c/p\u003e\n"],["\u003cp\u003eThe library's latest version is 2.37.0-rc, with version 2.19.0 being the most referenced version throughout the page's detailed documentation.\u003c/p\u003e\n"],["\u003cp\u003eThe primary class within this library is \u003ccode\u003eprivateca_v1::CertificateAuthorityServiceClient\u003c/code\u003e, which exposes all RPCs as member functions for managing the Certificate Authority.\u003c/p\u003e\n"],["\u003cp\u003eThe library is in GA status but does not follow Semantic Versioning, as stated in the documentation.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation provides information about error handling, overriding the default endpoint and authentication credentials, retry policies, and using environment variables for library configuration.\u003c/p\u003e\n"]]],[],null,["Version 2.19.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/privateca/latest)\n- [2.41.0](/cpp/docs/reference/privateca/2.41.0)\n- [2.40.0](/cpp/docs/reference/privateca/2.40.0)\n- [2.39.0](/cpp/docs/reference/privateca/2.39.0)\n- [2.38.0](/cpp/docs/reference/privateca/2.38.0)\n- [2.37.0](/cpp/docs/reference/privateca/2.37.0)\n- [2.36.0](/cpp/docs/reference/privateca/2.36.0)\n- [2.35.0](/cpp/docs/reference/privateca/2.35.0)\n- [2.34.0](/cpp/docs/reference/privateca/2.34.0)\n- [2.33.0](/cpp/docs/reference/privateca/2.33.0)\n- [2.32.0](/cpp/docs/reference/privateca/2.32.0)\n- [2.31.0](/cpp/docs/reference/privateca/2.31.0)\n- [2.30.0](/cpp/docs/reference/privateca/2.30.0)\n- [2.29.0](/cpp/docs/reference/privateca/2.29.0)\n- [2.28.0](/cpp/docs/reference/privateca/2.28.0)\n- [2.27.0](/cpp/docs/reference/privateca/2.27.0)\n- [2.26.0](/cpp/docs/reference/privateca/2.26.0)\n- [2.25.1](/cpp/docs/reference/privateca/2.25.1)\n- [2.24.0](/cpp/docs/reference/privateca/2.24.0)\n- [2.23.0](/cpp/docs/reference/privateca/2.23.0)\n- [2.22.1](/cpp/docs/reference/privateca/2.22.1)\n- [2.21.0](/cpp/docs/reference/privateca/2.21.0)\n- [2.20.0](/cpp/docs/reference/privateca/2.20.0)\n- [2.19.0](/cpp/docs/reference/privateca/2.19.0)\n- [2.18.0](/cpp/docs/reference/privateca/2.18.0)\n- [2.17.0](/cpp/docs/reference/privateca/2.17.0)\n- [2.16.0](/cpp/docs/reference/privateca/2.16.0)\n- [2.15.1](/cpp/docs/reference/privateca/2.15.1)\n- [2.14.0](/cpp/docs/reference/privateca/2.14.0)\n- [2.13.0](/cpp/docs/reference/privateca/2.13.0)\n- [2.12.0](/cpp/docs/reference/privateca/2.12.0)\n- [2.11.0](/cpp/docs/reference/privateca/2.11.0) \n\nCertificate Authority API C++ Client Library\n============================================\n\nAn idiomatic C++ client library for the [Certificate Authority API](https://cloud.google.com/certificate-authority-service/docs). The Certificate Authority Service API is a highly-available, scalable service that enables you to simplify and automate the management of private certificate authorities (CAs) while staying in control of your private keys.\n\nWhile this library is **GA** , please note Google Cloud C++ client libraries do **not** follow [Semantic Versioning](https://semver.org/).\n\n### Quickstart\n\nThe following shows the code that you'll run in the `google/cloud/privateca/quickstart/` directory, which should give you a taste of the Certificate Authority API C++ client library API. \n\n #include \"google/cloud/privateca/v1/certificate_authority_client.h\"\n #include \"google/cloud/location.h\"\n #include \u003ciostream\u003e\n\n int main(int argc, char* argv[]) try {\n if (argc != 3) {\n std::cerr \u003c\u003c \"Usage: \" \u003c\u003c argv[0] \u003c\u003c \" project-id location-id\\n\";\n return 1;\n }\n\n auto const location = google::cloud::Location(argv[1], argv[2]);\n\n namespace privateca = ::google::cloud::privateca_v1;\n auto client = privateca::CertificateAuthorityServiceClient(\n privateca::MakeCertificateAuthorityServiceConnection());\n\n for (auto ca_pool : client.ListCaPools(location.FullName())) {\n if (!ca_pool) throw std::move(ca_pool).status();\n std::cout \u003c\u003c ca_pool-\u003eDebugString() \u003c\u003c \"\\n\";\n }\n\n return 0;\n } catch (google::cloud::Status const& status) {\n std::cerr \u003c\u003c \"google::cloud::Status thrown: \" \u003c\u003c status \u003c\u003c \"\\n\";\n return 1;\n }\n\n### Main classes\n\nThe main class in this library is [`privateca_v1::CertificateAuthorityServiceClient`](/cpp/docs/reference/privateca/2.19.0/classgoogle_1_1cloud_1_1privateca__v1_1_1CertificateAuthorityServiceClient). All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock [`privateca_v1::CertificateAuthorityServiceClient`](/cpp/docs/reference/privateca/2.19.0/classgoogle_1_1cloud_1_1privateca__v1_1_1CertificateAuthorityServiceClient) when testing your application.\n\n### More Information\n\n- [Error Handling](https://cloud.google.com/cpp/docs/reference/common/latest/common-error-handling.html) - describes how the library reports errors.\n- [How to Override the Default Endpoint](/cpp/docs/reference/privateca/2.19.0/privateca-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/privateca/2.19.0/privateca-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Override Retry, Backoff, and Idempotency Policies](/cpp/docs/reference/privateca/2.19.0/privateca-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/privateca/2.19.0/privateca-env) - describes environment variables that can configure the behavior of the library."]]