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 webpage provides documentation for the Certificate Authority API C++ client library, which is currently at version 2.35.0, but the latest release is 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe library allows you to manage private certificate authorities and their keys via the Certificate Authority Service API.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eprivateca_v1::CertificateAuthorityServiceClient\u003c/code\u003e class is the primary component of this library, exposing all remote procedure calls (RPCs).\u003c/p\u003e\n"],["\u003cp\u003eThe library's documentation includes instructions on error handling, overriding default endpoints and authentication credentials, as well as adjusting retry policies.\u003c/p\u003e\n"],["\u003cp\u003eGoogle Cloud C++ client libraries do not follow semantic versioning, despite the library being generally available.\u003c/p\u003e\n"]]],[],null,["Version 2.35.0keyboard_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/2.35.0/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/2.35.0/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/2.35.0/privateca-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/privateca/2.35.0/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/2.35.0/privateca-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/privateca/2.35.0/privateca-env) - describes environment variables that can configure the behavior of the library."]]