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 for the C++ client library is version 2.37.0-rc, with multiple versions available, ranging down to 2.11.0.\u003c/p\u003e\n"],["\u003cp\u003eThis library is a Google Cloud C++ client library for the Certificate Authority API, enabling automated management of private certificate authorities, though it doesn't follow Semantic Versioning.\u003c/p\u003e\n"],["\u003cp\u003eThe main class is \u003ccode\u003eprivateca_v1::CertificateAuthorityServiceClient\u003c/code\u003e, which houses all Remote Procedure Calls (RPCs) and has helper classes for configuration, and testing.\u003c/p\u003e\n"],["\u003cp\u003eThe library includes resources for error handling, overriding endpoints and authentication credentials, and modifying retry policies through environment variables.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eListCaPools\u003c/code\u003e example demonstrates the C++ code for interacting with the Certificate Authority API to retreive the various CA Pools.\u003c/p\u003e\n"]]],[],null,["Version 2.16.0keyboard_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/2.16.0/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/2.16.0/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/2.16.0/privateca-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/privateca/2.16.0/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/2.16.0/privateca-override-retry) - describes how to change the default retry policies.\n- [Environment Variables](/cpp/docs/reference/privateca/2.16.0/privateca-env) - describes environment variables that can configure the behavior of the library."]]