Use DescribeCertificate com um AWS SDK ou CLI

using System;
using System.Threading.Tasks;
using Amazon;
using Amazon.CertificateManager;
using Amazon.CertificateManager.Model;

namespace DescribeCertificate
{
    class DescribeCertificate
    {
        // The following example retrieves and displays the metadata for a
        // certificate using the AWS Certificate Manager (ACM) service.

        // Specify your AWS Region (an example Region is shown).
        private static readonly RegionEndpoint ACMRegion = RegionEndpoint.USEast1;
        private static AmazonCertificateManagerClient _client;

        static void Main(string[] args)
        {
            _client = new Amazon.CertificateManager.AmazonCertificateManagerClient(ACMRegion);

            var describeCertificateReq = new DescribeCertificateRequest();
            // The ARN used here is just an example. Replace it with the ARN of
            // a certificate that exists on your account.
            describeCertificateReq.CertificateArn =
                "arn:aws:acm:us-east-1:123456789012:certificate/8cfd7dae-9b6a-2d07-92bc-1c309EXAMPLE";

            var certificateDetailResp =
                DescribeCertificateResponseAsync(client: _client, request: describeCertificateReq);
            var certificateDetail = certificateDetailResp.Result.Certificate;

            if (certificateDetail is not null)
            {
                DisplayCertificateDetails(certificateDetail);
            }
        }

        /// <summary>
        /// Displays detailed metadata about a certificate retrieved
        /// using the ACM service.
        /// </summary>
        /// <param name="certificateDetail">The object that contains details
        /// returned from the call to DescribeCertificateAsync.</param>
        static void DisplayCertificateDetails(CertificateDetail certificateDetail)
        {
            Console.WriteLine("\nCertificate Details: ");
            Console.WriteLine($"Certificate Domain: {certificateDetail.DomainName}");
            Console.WriteLine($"Certificate Arn: {certificateDetail.CertificateArn}");
            Console.WriteLine($"Certificate Subject: {certificateDetail.Subject}");
            Console.WriteLine($"Certificate Status: {certificateDetail.Status}");
            foreach (var san in certificateDetail.SubjectAlternativeNames)
            {
                Console.WriteLine($"Certificate SubjectAlternativeName: {san}");
            }
        }

        /// <summary>
        /// Retrieves the metadata associated with the ACM service certificate.
        /// </summary>
        /// <param name="client">An AmazonCertificateManagerClient object
        /// used to call DescribeCertificateResponse.</param>
        /// <param name="request">The DescribeCertificateRequest object that
        /// will be passed to the method call.</param>
        /// <returns></returns>
        static async Task<DescribeCertificateResponse> DescribeCertificateResponseAsync(
            AmazonCertificateManagerClient client, DescribeCertificateRequest request)
        {
            var response = new DescribeCertificateResponse();

            try
            {
                response = await client.DescribeCertificateAsync(request);
            }
            catch (InvalidArnException)
            {
                Console.WriteLine($"Error: The ARN specified is invalid.");
            }
            catch (ResourceNotFoundException)
            {
                Console.WriteLine($"Error: The specified certificate could not be found.");
            }

            return response;
        }
    }

}

//! Describe an AWS Certificate Manager (ACM) certificate.
/*!
  \param certificateArn: The Amazon Resource Name (ARN) of a certificate.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::ACM::describeCertificate(const Aws::String &certificateArn,
                                      const Aws::Client::ClientConfiguration &clientConfiguration) {
    Aws::ACM::ACMClient acm_client(clientConfiguration);

    Aws::ACM::Model::DescribeCertificateRequest request;
    request.WithCertificateArn(certificateArn);

    Aws::ACM::Model::DescribeCertificateOutcome outcome =
            acm_client.DescribeCertificate(request);

    if (!outcome.IsSuccess()) {
        std::cerr << "Error: DescribeCertificate: " <<
                  outcome.GetError().GetMessage() << std::endl;
    }
    else {
        Aws::ACM::Model::CertificateDetail certificate =
                outcome.GetResult().GetCertificate();

        std::cout << "Success: Information about certificate "
                     "with ARN '" << certificateArn << "':" << std::endl << std::endl;

        std::cout << "ARN:                 " << certificate.GetCertificateArn()
                  << std::endl;
        std::cout << "Authority ARN:       " <<
                  certificate.GetCertificateAuthorityArn() << std::endl;
        std::cout << "Created at (GMT):    " <<
                  certificate.GetCreatedAt().ToGmtString(
                          Aws::Utils::DateFormat::ISO_8601)
                  << std::endl;
        std::cout << "Domain name:         " << certificate.GetDomainName()
                  << std::endl;

        Aws::Vector<Aws::ACM::Model::DomainValidation> options =
                certificate.GetDomainValidationOptions();

        if (!options.empty()) {
            std::cout << std::endl << "Domain validation information: "
                      << std::endl << std::endl;

            for (auto &validation: options) {
                std::cout << "  Domain name:              " <<
                          validation.GetDomainName() << std::endl;

                const Aws::ACM::Model::ResourceRecord &record =
                        validation.GetResourceRecord();

                std::cout << "  Resource record name:     " <<
                          record.GetName() << std::endl;

                Aws::ACM::Model::RecordType recordType = record.GetType();
                Aws::String type;

                switch (recordType) {
                    case Aws::ACM::Model::RecordType::CNAME:
                        type = "CNAME";
                        break;
                    case Aws::ACM::Model::RecordType::NOT_SET:
                        type = "Not set";
                        break;
                    default:
                        type = "Cannot determine.";
                        break;
                }

                std::cout << "  Resource record type:     " << type <<
                          std::endl;

                std::cout << "  Resource record value:    " <<
                          record.GetValue() << std::endl;

                std::cout << "  Validation domain:        " <<
                          validation.GetValidationDomain() << std::endl;

                Aws::Vector<Aws::String> emails =
                        validation.GetValidationEmails();

                if (!emails.empty()) {
                    std::cout << "  Validation emails:" << std::endl <<
                              std::endl;

                    for (auto &email: emails) {
                        std::cout << "    " << email << std::endl;
                    }

                    std::cout << std::endl;
                }

                Aws::ACM::Model::ValidationMethod validationMethod =
                        validation.GetValidationMethod();
                Aws::String method;

                switch (validationMethod) {
                    case Aws::ACM::Model::ValidationMethod::DNS:
                        method = "DNS";
                        break;
                    case Aws::ACM::Model::ValidationMethod::EMAIL:
                        method = "Email";
                        break;
                    case Aws::ACM::Model::ValidationMethod::NOT_SET:
                        method = "Not set";
                        break;
                    default:
                        method = "Cannot determine";
                }

                std::cout << "  Validation method:        " <<
                          method << std::endl;

                Aws::ACM::Model::DomainStatus domainStatus =
                        validation.GetValidationStatus();
                Aws::String status;

                switch (domainStatus) {
                    case Aws::ACM::Model::DomainStatus::FAILED:
                        status = "Failed";
                        break;
                    case Aws::ACM::Model::DomainStatus::NOT_SET:
                        status = "Not set";
                        break;
                    case Aws::ACM::Model::DomainStatus::PENDING_VALIDATION:
                        status = "Pending validation";
                        break;
                    case Aws::ACM::Model::DomainStatus::SUCCESS:
                        status = "Success";
                        break;
                    default:
                        status = "Cannot determine";
                }

                std::cout << "  Domain validation status: " << status <<
                          std::endl << std::endl;

            }
        }

        Aws::Vector<Aws::ACM::Model::ExtendedKeyUsage> usages =
                certificate.GetExtendedKeyUsages();

        if (!usages.empty()) {
            std::cout << std::endl << "Extended key usages:" <<
                      std::endl << std::endl;

            for (auto &usage: usages) {
                Aws::ACM::Model::ExtendedKeyUsageName usageName =
                        usage.GetName();
                Aws::String name;

                switch (usageName) {
                    case Aws::ACM::Model::ExtendedKeyUsageName::ANY:
                        name = "Any";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::CODE_SIGNING:
                        name = "Code signing";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::CUSTOM:
                        name = "Custom";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::EMAIL_PROTECTION:
                        name = "Email protection";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::IPSEC_END_SYSTEM:
                        name = "IPSEC end system";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::IPSEC_TUNNEL:
                        name = "IPSEC tunnel";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::IPSEC_USER:
                        name = "IPSEC user";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::NONE:
                        name = "None";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::NOT_SET:
                        name = "Not set";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::OCSP_SIGNING:
                        name = "OCSP signing";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::TIME_STAMPING:
                        name = "Time stamping";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::TLS_WEB_CLIENT_AUTHENTICATION:
                        name = "TLS web client authentication";
                        break;
                    case Aws::ACM::Model::ExtendedKeyUsageName::TLS_WEB_SERVER_AUTHENTICATION:
                        name = "TLS web server authentication";
                        break;
                    default:
                        name = "Cannot determine";
                }

                std::cout << "  Name: " << name << std::endl;
                std::cout << "  OID:  " << usage.GetOID() <<
                          std::endl << std::endl;
            }

            std::cout << std::endl;
        }

        Aws::ACM::Model::CertificateStatus certificateStatus =
                certificate.GetStatus();
        Aws::String status;

        switch (certificateStatus) {
            case Aws::ACM::Model::CertificateStatus::EXPIRED:
                status = "Expired";
                break;
            case Aws::ACM::Model::CertificateStatus::FAILED:
                status = "Failed";
                break;
            case Aws::ACM::Model::CertificateStatus::INACTIVE:
                status = "Inactive";
                break;
            case Aws::ACM::Model::CertificateStatus::ISSUED:
                status = "Issued";
                break;
            case Aws::ACM::Model::CertificateStatus::NOT_SET:
                status = "Not set";
                break;
            case Aws::ACM::Model::CertificateStatus::PENDING_VALIDATION:
                status = "Pending validation";
                break;
            case Aws::ACM::Model::CertificateStatus::REVOKED:
                status = "Revoked";
                break;
            case Aws::ACM::Model::CertificateStatus::VALIDATION_TIMED_OUT:
                status = "Validation timed out";
                break;
            default:
                status = "Cannot determine";
        }

        std::cout << "Status:              " << status << std::endl;

        if (certificate.GetStatus() ==
            Aws::ACM::Model::CertificateStatus::FAILED) {
            Aws::ACM::Model::FailureReason failureReason =
                    certificate.GetFailureReason();
            Aws::String reason;

            switch (failureReason) {
                case Aws::ACM::Model::FailureReason::ADDITIONAL_VERIFICATION_REQUIRED:
                    reason = "Additional verification required";
                    break;
                case Aws::ACM::Model::FailureReason::CAA_ERROR:
                    reason = "CAA error";
                    break;
                case Aws::ACM::Model::FailureReason::DOMAIN_NOT_ALLOWED:
                    reason = "Domain not allowed";
                    break;
                case Aws::ACM::Model::FailureReason::DOMAIN_VALIDATION_DENIED:
                    reason = "Domain validation denied";
                    break;
                case Aws::ACM::Model::FailureReason::INVALID_PUBLIC_DOMAIN:
                    reason = "Invalid public domain";
                    break;
                case Aws::ACM::Model::FailureReason::NOT_SET:
                    reason = "Not set";
                    break;
                case Aws::ACM::Model::FailureReason::NO_AVAILABLE_CONTACTS:
                    reason = "No available contacts";
                    break;
                case Aws::ACM::Model::FailureReason::OTHER:
                    reason = "Other";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_ACCESS_DENIED:
                    reason = "PCA access denied";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_INVALID_ARGS:
                    reason = "PCA invalid args";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_INVALID_ARN:
                    reason = "PCA invalid ARN";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_INVALID_DURATION:
                    reason = "PCA invalid duration";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_INVALID_STATE:
                    reason = "PCA invalid state";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_LIMIT_EXCEEDED:
                    reason = "PCA limit exceeded";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_NAME_CONSTRAINTS_VALIDATION:
                    reason = "PCA name constraints validation";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_REQUEST_FAILED:
                    reason = "PCA request failed";
                    break;
                case Aws::ACM::Model::FailureReason::PCA_RESOURCE_NOT_FOUND:
                    reason = "PCA resource not found";
                    break;
                default:
                    reason = "Cannot determine";
            }

            std::cout << "Failure reason:      " << reason << std::endl;
        }

        if (certificate.GetStatus() == Aws::ACM::Model::CertificateStatus::REVOKED) {
            std::cout << "Revoked at (GMT):    " <<
                      certificate.GetRevokedAt().ToGmtString(
                              Aws::Utils::DateFormat::ISO_8601)
                      << std::endl;

            Aws::ACM::Model::RevocationReason revocationReason =
                    certificate.GetRevocationReason();
            Aws::String reason;

            switch (revocationReason) {
                case Aws::ACM::Model::RevocationReason::AFFILIATION_CHANGED:
                    reason = "Affiliation changed";
                    break;
                case Aws::ACM::Model::RevocationReason::A_A_COMPROMISE:
                    reason = "AA compromise";
                    break;
                case Aws::ACM::Model::RevocationReason::CA_COMPROMISE:
                    reason = "CA compromise";
                    break;
                case Aws::ACM::Model::RevocationReason::CERTIFICATE_HOLD:
                    reason = "Certificate hold";
                    break;
                case Aws::ACM::Model::RevocationReason::CESSATION_OF_OPERATION:
                    reason = "Cessation of operation";
                    break;
                case Aws::ACM::Model::RevocationReason::KEY_COMPROMISE:
                    reason = "Key compromise";
                    break;
                case Aws::ACM::Model::RevocationReason::NOT_SET:
                    reason = "Not set";
                    break;
                case Aws::ACM::Model::RevocationReason::PRIVILEGE_WITHDRAWN:
                    reason = "Privilege withdrawn";
                    break;
                case Aws::ACM::Model::RevocationReason::REMOVE_FROM_CRL:
                    reason = "Revoke from CRL";
                    break;
                case Aws::ACM::Model::RevocationReason::SUPERCEDED:
                    reason = "Superceded";
                    break;
                case Aws::ACM::Model::RevocationReason::UNSPECIFIED:
                    reason = "Unspecified";
                    break;
                default:
                    reason = "Cannot determine";
            }

            std::cout << "Revocation reason:   " << reason << std::endl;
        }

        if (certificate.GetType() == Aws::ACM::Model::CertificateType::IMPORTED) {
            std::cout << "Imported at (GMT):   " <<
                      certificate.GetImportedAt().ToGmtString(
                              Aws::Utils::DateFormat::ISO_8601)
                      << std::endl;
        }

        Aws::Vector<Aws::String> inUseBys = certificate.GetInUseBy();

        if (!inUseBys.empty()) {
            std::cout << std::endl << "In use by:" << std::endl << std::endl;

            for (auto &in_use_by: inUseBys) {
                std::cout << "  " << in_use_by << std::endl;
            }

            std::cout << std::endl;
        }

        if (certificate.GetType() == Aws::ACM::Model::CertificateType::AMAZON_ISSUED &&
            certificate.GetStatus() == Aws::ACM::Model::CertificateStatus::ISSUED) {
            std::cout << "Issued at (GMT):     " <<
                      certificate.GetIssuedAt().ToGmtString(
                              Aws::Utils::DateFormat::ISO_8601)
                      << std::endl;
        }

        std::cout << "Issuer:              " << certificate.GetIssuer() <<
                  std::endl;

        Aws::ACM::Model::KeyAlgorithm keyAlgorithm =
                certificate.GetKeyAlgorithm();
        Aws::String algorithm;

        switch (keyAlgorithm) {
            case Aws::ACM::Model::KeyAlgorithm::EC_prime256v1:
                algorithm = "P-256 (secp256r1, prime256v1)";
                break;
            case Aws::ACM::Model::KeyAlgorithm::EC_secp384r1:
                algorithm = "P-384 (secp384r1)";
                break;
            case Aws::ACM::Model::KeyAlgorithm::EC_secp521r1:
                algorithm = "P-521 (secp521r1)";
                break;
            case Aws::ACM::Model::KeyAlgorithm::NOT_SET:
                algorithm = "Not set";
                break;
            case Aws::ACM::Model::KeyAlgorithm::RSA_1024:
                algorithm = "RSA 1024";
                break;
            case Aws::ACM::Model::KeyAlgorithm::RSA_2048:
                algorithm = "RSA 2048";
                break;
            case Aws::ACM::Model::KeyAlgorithm::RSA_4096:
                algorithm = "RSA 4096";
                break;
            default:
                algorithm = "Cannot determine";
        }

        std::cout << "Key algorithm:       " << algorithm << std::endl;

        if (certificate.GetStatus() == Aws::ACM::Model::CertificateStatus::ISSUED) {
            std::cout << "Not valid after (GMT): " <<
                      certificate.GetNotAfter().ToGmtString(
                              Aws::Utils::DateFormat::ISO_8601)
                      << std::endl;
            std::cout << "Not valid before (GMT): " <<
                      certificate.GetNotBefore().ToGmtString(
                              Aws::Utils::DateFormat::ISO_8601)
                      << std::endl;
        }

        Aws::ACM::Model::CertificateTransparencyLoggingPreference loggingPreference =
                certificate.GetOptions().GetCertificateTransparencyLoggingPreference();
        Aws::String preference;

        switch (loggingPreference) {
            case Aws::ACM::Model::CertificateTransparencyLoggingPreference::DISABLED:
                preference = "Disabled";
                break;
            case Aws::ACM::Model::CertificateTransparencyLoggingPreference::ENABLED:
                preference = "Enabled";
                break;
            case Aws::ACM::Model::CertificateTransparencyLoggingPreference::NOT_SET:
                preference = "Not set";
                break;
            default:
                preference = "Cannot determine";
        }

        std::cout << "Logging preference:  " << preference << std::endl;

        std::cout << "Serial:              " << certificate.GetSerial() <<
                  std::endl;
        std::cout << "Signature algorithm: "
                  << certificate.GetSignatureAlgorithm() << std::endl;
        std::cout << "Subject:             " << certificate.GetSubject() <<
                  std::endl;

        Aws::ACM::Model::CertificateType certificateType = certificate.GetType();
        Aws::String type;

        switch (certificateType) {
            case Aws::ACM::Model::CertificateType::AMAZON_ISSUED:
                type = "Amazon issued";
                break;
            case Aws::ACM::Model::CertificateType::IMPORTED:
                type = "Imported";
                break;
            case Aws::ACM::Model::CertificateType::NOT_SET:
                type = "Not set";
                break;
            case Aws::ACM::Model::CertificateType::PRIVATE_:
                type = "Private";
                break;
            default:
                type = "Cannot determine";
        }

        std::cout << "Type:                " << type << std::endl;

        Aws::Vector<Aws::String> altNames =
                certificate.GetSubjectAlternativeNames();

        if (!altNames.empty()) {
            std::cout << std::endl << "Alternative names:" <<
                      std::endl << std::endl;

            for (auto &alt_name: altNames) {
                std::cout << "  " << alt_name << std::endl;
            }

            std::cout << std::endl;
        }
    }

    return outcome.IsSuccess();
}

Para recuperar os campos contidos em um certificado ACM

O describe-certificate comando a seguir recupera todos os campos do certificado com o especificadoARN:

aws acm describe-certificate --certificate-arn arn:aws:acm:region:account:certificate/12345678-1234-1234-1234-123456789012

Uma saída semelhante à seguinte é exibida:

{
  "Certificate": {
    "CertificateArn": "arn:aws:acm:region:account:certificate/12345678-1234-1234-1234-123456789012",
    "CreatedAt": 1446835267.0,
    "DomainName": "www.example.com",
    "DomainValidationOptions": [
      {
        "DomainName": "www.example.com",
        "ValidationDomain": "www.example.com",
        "ValidationEmails": [
          "hostmaster@example.com",
          "admin@example.com",
          "owner@example.com.whoisprivacyservice.org",
          "tech@example.com.whoisprivacyservice.org",
          "admin@example.com.whoisprivacyservice.org",
          "postmaster@example.com",
          "webmaster@example.com",
          "administrator@example.com"
        ]
      },
      {
        "DomainName": "www.example.net",
        "ValidationDomain": "www.example.net",
        "ValidationEmails": [
          "postmaster@example.net",
          "admin@example.net",
          "owner@example.net.whoisprivacyservice.org",
          "tech@example.net.whoisprivacyservice.org",
          "admin@example.net.whoisprivacyservice.org",
          "hostmaster@example.net",
          "administrator@example.net",
          "webmaster@example.net"
        ]
      }
    ],
    "InUseBy": [],
    "IssuedAt": 1446835815.0,
    "Issuer": "Amazon",
    "KeyAlgorithm": "RSA-2048",
    "NotAfter": 1478433600.0,
    "NotBefore": 1446768000.0,
    "Serial": "0f:ac:b0:a3:8d:ea:65:52:2d:7d:01:3a:39:36:db:d6",
    "SignatureAlgorithm": "SHA256WITHRSA",
    "Status": "ISSUED",
    "Subject": "CN=www.example.com",
    "SubjectAlternativeNames": [
      "www.example.com",
      "www.example.net"
    ]
  }
}

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 * <p>
 * For more information, see the following documentation topic:
 * <p>
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */

public class DescribeCert {

    public static void main(String[] args) {
        final String usage = """

            Usage:    <certArn>

            Where:
                certArn - the ARN of the certificate.
            """;
        if (args.length != 1) {
            System.out.println(usage);
            return;
        }

        String certArn = args[0];
        describeCertificate(certArn);
    }

    /**
     * Describes the details of an SSL/TLS certificate.
     *
     * @param certArn the Amazon Resource Name (ARN) of the certificate to describe
     * @throws AcmException if an error occurs while describing the certificate
     */
    public static void describeCertificate(String certArn) {
        AcmClient acmClient = AcmClient.create();
        DescribeCertificateRequest req = DescribeCertificateRequest.builder()
            .certificateArn(certArn)
            .build();

        try {
            DescribeCertificateResponse response = acmClient.describeCertificate(req);

            // Print the certificate details.
            System.out.println("Certificate ARN: " + response.certificate().certificateArn());
            System.out.println("Domain Name: " + response.certificate().domainName());
            System.out.println("Issued By: " + response.certificate().issuer());
            System.out.println("Issued On: " + response.certificate().issuedAt());
            System.out.println("Status: " + response.certificate().status());
        } catch (AcmException e) {
            System.out.println(e.getMessage());
        }
    }
}

Exemplo 1: Retorna detalhes do certificado especificado.

Get-ACMCertificateDetail -CertificateArn "arn:aws:acm:us-east-1:123456789012:certificate/12345678-1234-1234-1234-123456789012"

Saída:

CertificateArn          : arn:aws:acm:us-east-1:123456789012:certificate/12345678-1234-1234-1234-123456789012
CreatedAt               : 1/21/2016 5:55:59 PM
DomainName              : www.example.com
DomainValidationOptions : {www.example.com}
InUseBy                 : {}
IssuedAt                : 1/1/0001 12:00:00 AM
Issuer                  :
KeyAlgorithm            : RSA-2048
NotAfter                : 1/1/0001 12:00:00 AM
NotBefore               : 1/1/0001 12:00:00 AM
RevocationReason        :
RevokedAt               : 1/1/0001 12:00:00 AM
Serial                  :
SignatureAlgorithm      : SHA256WITHRSA
Status                  : PENDING_VALIDATION
Subject                 : CN=www.example.com
SubjectAlternativeNames : {www.example.net}

class AcmCertificate:
    """
    Encapsulates ACM functions.
    """

    def __init__(self, acm_client):
        """
        :param acm_client: A Boto3 ACM client.
        """
        self.acm_client = acm_client


    def describe(self, certificate_arn):
        """
        Gets certificate metadata.

        :param certificate_arn: The Amazon Resource Name (ARN) of the certificate.
        :return: Metadata about the certificate.
        """
        try:
            response = self.acm_client.describe_certificate(
                CertificateArn=certificate_arn
            )
            certificate = response["Certificate"]
            logger.info(
                "Got metadata for certificate for domain %s.", certificate["DomainName"]
            )
        except ClientError:
            logger.exception("Couldn't get data for certificate %s.", certificate_arn)
            raise
        else:
            return certificate