--- title: "Certificate" description: "Namespace: Lacuna.Pki" canonical: "https://docs.lacunasoftware.com/api/Lacuna.Pki/Certificate" locale: "pt-BR" product: "PKI SDK" last_updated: "2026-06-02" --- # Certificate **Namespace:** `Lacuna.Pki` **Assembly:** `Lacuna.Pki` _Class_ ```csharp public abstract class Certificate ``` **Hierarquia:** [`object`](https://learn.microsoft.com/dotnet/api/system.object) → `Certificate` ## Construtores ### `Certificate()` ```csharp protected Certificate() ``` --- ## Campos ### `issuer` ```csharp protected PKCertificate issuer ``` **Retorno** [`PKCertificate`](https://docs.lacunasoftware.com/api/Lacuna.Pki/PKCertificate) --- ## Propriedades ### `AuthorityInformationAccess` ```csharp protected AuthorityInformationAccess AuthorityInformationAccess { get; } ``` **Retorno** [`AuthorityInformationAccess`](https://docs.lacunasoftware.com/api/Lacuna.Pki/AuthorityInformationAccess) --- ### `CAIssuersUri` ```csharp public Uri CAIssuersUri { get; } ``` **Retorno** [`Uri`](https://learn.microsoft.com/dotnet/api/system.uri) --- ### `EncodedValue` ```csharp public byte[] EncodedValue { get; protected set; } ``` **Retorno** [`byte[]`](https://learn.microsoft.com/dotnet/api/system.byte) --- ### `Extensions` ```csharp public X509Extensions Extensions { get; protected set; } ``` **Retorno** [`X509Extensions`](https://docs.lacunasoftware.com/api/Lacuna.Pki/X509Extensions) --- ### `IsSelfSigned` Denotes whether this is a self-signed certificate (root certificate) or not. NOTICE: never test the condition Issuer==null to assertain if a certificate is self-signed, since that condition may throw an exception in case the certificate is not a self-signed certificate but its issuer could not be located. For such purposes, use this property instead. ```csharp public abstract bool IsSelfSigned { get; } ``` **Retorno** [`bool`](https://learn.microsoft.com/dotnet/api/system.boolean) --- ### `Issuer` The certificate's issuer public key certificate, or null if the certificate is self-signed. If the certificate is not self signed but the issuer cannot be found, this property throws a CertificateIssuerNotFoundException. In order to check if the issuer was found, use the property IssuerFound before calling this property. NOTICE: never test the condition Issuer==null to assertain if a PKCertificate is self-signed. For such purposes, use the property IsSelfSigned instead. ```csharp public PKCertificate Issuer { get; } ``` **Retorno** [`PKCertificate`](https://docs.lacunasoftware.com/api/Lacuna.Pki/PKCertificate) --- ### `IssuerDisplayName` ```csharp public abstract string IssuerDisplayName { get; } ``` **Retorno** [`string`](https://learn.microsoft.com/dotnet/api/system.string) --- ### `IssuerDN` ```csharp protected abstract Name IssuerDN { get; } ``` **Retorno** [`Name`](https://docs.lacunasoftware.com/api/Lacuna.Pki/Name) --- ### `IssuerFound` Denotes whether the certificate's issuer was found. Returns false for self-signed certificates. NOTICE: this property is not exactly a negation of the IssuerNotFound property, since both properties return false for self-signed certificates. ```csharp public bool IssuerFound { get; } ``` **Retorno** [`bool`](https://learn.microsoft.com/dotnet/api/system.boolean) --- ### `IssuerKeyIdentifier` ```csharp public byte[] IssuerKeyIdentifier { get; } ``` **Retorno** [`byte[]`](https://learn.microsoft.com/dotnet/api/system.byte) --- ### `IssuerNotFound` Denothes whether the certificate's issuer was not found. Returns false for self-signed certificates. NOTICE: this property is not exactly a negation of the IssuerFound property, since both properties return false for self-signed certificates. ```csharp public bool IssuerNotFound { get; } ``` **Retorno** [`bool`](https://learn.microsoft.com/dotnet/api/system.boolean) --- ### `OcspUri` ```csharp public Uri OcspUri { get; } ``` **Retorno** [`Uri`](https://learn.microsoft.com/dotnet/api/system.uri) --- ### `SerialNumber` ```csharp public BigInteger SerialNumber { get; protected set; } ``` **Retorno** [`BigInteger`](https://learn.microsoft.com/dotnet/api/system.numerics.biginteger) --- ### `SignatureAlgorithm` ```csharp public SignatureAlgorithm SignatureAlgorithm { get; protected set; } ``` **Retorno** [`SignatureAlgorithm`](https://docs.lacunasoftware.com/api/Lacuna.Pki/SignatureAlgorithm) --- ### `SignatureValue` ```csharp public byte[] SignatureValue { get; protected set; } ``` **Retorno** [`byte[]`](https://learn.microsoft.com/dotnet/api/system.byte) --- ### `SubjectDisplayName` ```csharp public abstract string SubjectDisplayName { get; } ``` **Retorno** [`string`](https://learn.microsoft.com/dotnet/api/system.string) --- ### `TbsCertificateEncoded` ```csharp protected byte[] TbsCertificateEncoded { get; } ``` **Retorno** [`byte[]`](https://learn.microsoft.com/dotnet/api/system.byte) --- ### `ThumbprintSHA1` ```csharp public byte[] ThumbprintSHA1 { get; } ``` **Retorno** [`byte[]`](https://learn.microsoft.com/dotnet/api/system.byte) --- ### `ThumbprintSHA256` ```csharp public byte[] ThumbprintSHA256 { get; } ``` **Retorno** [`byte[]`](https://learn.microsoft.com/dotnet/api/system.byte) --- ### `TrustAnchor` Returns the trust anchor for this certificate, that is, the root certificate at the top of the certification chain. Throws a CertificateIssuerNotFoundException if the certification chain cannot be determined all the way to a root certificate. ```csharp public PKCertificate TrustAnchor { get; } ``` **Retorno** [`PKCertificate`](https://docs.lacunasoftware.com/api/Lacuna.Pki/PKCertificate) --- ### `ValidityEnd` ```csharp public DateTimeOffset ValidityEnd { get; protected set; } ``` **Retorno** [`DateTimeOffset`](https://learn.microsoft.com/dotnet/api/system.datetimeoffset) --- ### `ValidityStart` ```csharp public DateTimeOffset ValidityStart { get; protected set; } ``` **Retorno** [`DateTimeOffset`](https://learn.microsoft.com/dotnet/api/system.datetimeoffset) --- ## Métodos ### `Equals(object)` ```csharp public override bool Equals(object other) ``` **Parâmetros** | Nome | Tipo | Descrição | |---|---|---| | `other` | [`object`](https://learn.microsoft.com/dotnet/api/system.object) | | **Retorno** [`bool`](https://learn.microsoft.com/dotnet/api/system.boolean) --- ### `GetCertificateChain()` Returns the certificate chain from this certificate up to the root certificate ```csharp public List GetCertificateChain() ``` **Retorno** [`List`](https://learn.microsoft.com/dotnet/api/system.collections.generic.list-1) — The complete certificate chain, starting with this certificate and ending on the root certificate. --- ### `GetHashCode()` ```csharp public override int GetHashCode() ``` **Retorno** [`int`](https://learn.microsoft.com/dotnet/api/system.int32) --- ### `GetTbsCertificateEncoded()` ```csharp protected abstract byte[] GetTbsCertificateEncoded() ``` **Retorno** [`byte[]`](https://learn.microsoft.com/dotnet/api/system.byte) --- ### `TryFillIssuer(ICertificateStore)` ```csharp protected void TryFillIssuer(ICertificateStore certStore) ``` **Parâmetros** | Nome | Tipo | Descrição | |---|---|---| | `certStore` | [`ICertificateStore`](https://docs.lacunasoftware.com/api/Lacuna.Pki.Stores/ICertificateStore) | | --- ### `Validate(CertificateValidationOptions)` ```csharp public ValidationResults Validate(CertificateValidationOptions validationOptions) ``` **Parâmetros** | Nome | Tipo | Descrição | |---|---|---| | `validationOptions` | [`CertificateValidationOptions`](https://docs.lacunasoftware.com/api/Lacuna.Pki/CertificateValidationOptions) | | **Retorno** [`ValidationResults`](https://docs.lacunasoftware.com/api/Lacuna.Pki/ValidationResults) --- ### `Validate(ITrustArbitrator)` ```csharp public ValidationResults Validate(ITrustArbitrator trustArbitrator) ``` **Parâmetros** | Nome | Tipo | Descrição | |---|---|---| | `trustArbitrator` | [`ITrustArbitrator`](https://docs.lacunasoftware.com/api/Lacuna.Pki/ITrustArbitrator) | | **Retorno** [`ValidationResults`](https://docs.lacunasoftware.com/api/Lacuna.Pki/ValidationResults) --- ## Membros herdados [`ToString()`](https://learn.microsoft.com/dotnet/api/system.object.tostring), [`Equals(object, object)`](), [`ReferenceEquals(object, object)`](https://learn.microsoft.com/dotnet/api/system.object.referenceequals), [`GetType()`](https://learn.microsoft.com/dotnet/api/system.object.gettype), [`MemberwiseClone()`](https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone)