public sealed class X509Extension : IMessage<X509Extension>, IEquatable<X509Extension>, IDeepCloneable<X509Extension>, IBufferMessage, IMessage
Reference documentation and code samples for the Certificate Authority v1 API class X509Extension.
An [X509Extension][google.cloud.security.privateca.v1.X509Extension]
specifies an X.509 extension, which may be used in different parts of X.509
objects like certificates, CSRs, and CRLs.
Optional. Indicates whether or not this extension is critical (i.e., if the
client does not know how to handle this extension, the client should
consider this to be an error).
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eX509Extension\u003c/code\u003e class, part of the Google Cloud Security Private CA v1 API, is used to define X.509 extensions for certificates, CSRs, and CRLs.\u003c/p\u003e\n"],["\u003cp\u003eVersion 3.9.0 is the latest available version for the \u003ccode\u003eX509Extension\u003c/code\u003e class within the Google Cloud Security Private CA v1 API, and previous versions are also available to reference.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eX509Extension\u003c/code\u003e implements several interfaces including \u003ccode\u003eIMessage\u003c/code\u003e, \u003ccode\u003eIEquatable\u003c/code\u003e, \u003ccode\u003eIDeepCloneable\u003c/code\u003e, and \u003ccode\u003eIBufferMessage\u003c/code\u003e, and inherits from \u003ccode\u003eobject\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eKey properties of the \u003ccode\u003eX509Extension\u003c/code\u003e class include \u003ccode\u003eCritical\u003c/code\u003e (indicating whether the extension is critical), \u003ccode\u003eObjectId\u003c/code\u003e (the OID of the extension), and \u003ccode\u003eValue\u003c/code\u003e (the extension's value).\u003c/p\u003e\n"]]],[],null,[]]
