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\u003eThe latest release candidate version for the Certificate Authority API C++ client library is 2.37.0-rc, with numerous prior versions available, ranging down to 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThis library provides a C++ interface for the Certificate Authority Service API, facilitating the management of private certificate authorities (CAs).\u003c/p\u003e\n"],["\u003cp\u003eThe primary class in this library is \u003ccode\u003eprivateca_v1::CertificateAuthorityServiceClient\u003c/code\u003e, which exposes all the RPC functions.\u003c/p\u003e\n"],["\u003cp\u003eThe library includes guides on error handling, endpoint and authentication overrides, as well as retry policy customization and environment variable configuration.\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 2.14.0keyboard_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 \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 namespace privateca = ::google::cloud::privateca_v1;\n auto client = privateca::CertificateAuthorityServiceClient(\n privateca::MakeCertificateAuthorityServiceConnection());\n\n auto const ca_pool =\n \"projects/\" + std::string(argv[1]) + \"/locations/\" + std::string(argv[2]);\n for (auto r : client.ListCaPools(ca_pool)) {\n if (!r) throw std::move(r).status();\n std::cout \u003c\u003c r-\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/2.14.0/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/2.14.0/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/2.14.0/privateca-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/privateca/2.14.0/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/2.14.0/privateca-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/privateca/2.14.0/privateca-env) - describes environment variables that can configure the behavior of the library."]]