Merge pull request #3514 from Infisical/ENG-2685

feat(pki): Store Secret Key Alongside Certificate + Endpoints to Fetch PK / Cert Bundle

backend/src/db/migrations/20250429232917_store-cert-secret-key-and-chain.ts

@@ -0,0 +1,33 @@
+import { Knex } from "knex";
+
+import { TableName } from "../schemas";
+
+export async function up(knex: Knex): Promise<void> {
+  if (await knex.schema.hasTable(TableName.CertificateBody)) {
+    await knex.schema.alterTable(TableName.CertificateBody, (t) => {
+      t.binary("encryptedCertificateChain").nullable();
+    });
+  }
+
+  if (!(await knex.schema.hasTable(TableName.CertificateSecret))) {
+    await knex.schema.createTable(TableName.CertificateSecret, (t) => {
+      t.uuid("id", { primaryKey: true }).defaultTo(knex.fn.uuid());
+      t.timestamps(true, true, true);
+      t.uuid("certId").notNullable().unique();
+      t.foreign("certId").references("id").inTable(TableName.Certificate).onDelete("CASCADE");
+      t.binary("encryptedPrivateKey").notNullable();
+    });
+  }
+}
+
+export async function down(knex: Knex): Promise<void> {
+  if (await knex.schema.hasTable(TableName.CertificateSecret)) {
+    await knex.schema.dropTable(TableName.CertificateSecret);
+  }
+
+  if (await knex.schema.hasTable(TableName.CertificateBody)) {
+    await knex.schema.alterTable(TableName.CertificateBody, (t) => {
+      t.dropColumn("encryptedCertificateChain");
+    });
+  }
+}

backend/src/db/schemas/certificate-bodies.ts

@@ -14,7 +14,8 @@ export const CertificateBodiesSchema = z.object({
   createdAt: z.date(),
   updatedAt: z.date(),
   certId: z.string().uuid(),
-  encryptedCertificate: zodBuffer
+  encryptedCertificate: zodBuffer,
+  encryptedCertificateChain: zodBuffer.nullable().optional()
 });
 
 export type TCertificateBodies = z.infer<typeof CertificateBodiesSchema>;

backend/src/db/schemas/certificate-secrets.ts

@@ -5,6 +5,8 @@
 
 import { z } from "zod";
 
+import { zodBuffer } from "@app/lib/zod";
+
 import { TImmutableDBKeys } from "./models";
 
 export const CertificateSecretsSchema = z.object({
@@ -12,8 +14,7 @@ export const CertificateSecretsSchema = z.object({
   createdAt: z.date(),
   updatedAt: z.date(),
   certId: z.string().uuid(),
-  pk: z.string(),
-  sk: z.string()
+  encryptedPrivateKey: zodBuffer
 });
 
 export type TCertificateSecrets = z.infer<typeof CertificateSecretsSchema>;

backend/src/db/schemas/projects.ts

@@ -27,7 +27,7 @@ export const ProjectsSchema = z.object({
   description: z.string().nullable().optional(),
   type: z.string(),
   enforceCapitalization: z.boolean().default(false),
-  hasDeleteProtection: z.boolean().default(true).nullable().optional()
+  hasDeleteProtection: z.boolean().default(false).nullable().optional()
 });
 
 export type TProjects = z.infer<typeof ProjectsSchema>;

backend/src/ee/services/audit-log/audit-log-types.ts

@@ -224,6 +224,8 @@ export enum EventType {
   DELETE_CERT = "delete-cert",
   REVOKE_CERT = "revoke-cert",
   GET_CERT_BODY = "get-cert-body",
+  GET_CERT_PRIVATE_KEY = "get-cert-private-key",
+  GET_CERT_BUNDLE = "get-cert-bundle",
   CREATE_PKI_ALERT = "create-pki-alert",
   GET_PKI_ALERT = "get-pki-alert",
   UPDATE_PKI_ALERT = "update-pki-alert",
@@ -1790,6 +1792,24 @@ interface GetCertBody {
   };
 }
 
+interface GetCertPrivateKey {
+  type: EventType.GET_CERT_PRIVATE_KEY;
+  metadata: {
+    certId: string;
+    cn: string;
+    serialNumber: string;
+  };
+}
+
+interface GetCertBundle {
+  type: EventType.GET_CERT_BUNDLE;
+  metadata: {
+    certId: string;
+    cn: string;
+    serialNumber: string;
+  };
+}
+
 interface CreatePkiAlert {
   type: EventType.CREATE_PKI_ALERT;
   metadata: {
@@ -2824,6 +2844,8 @@ export type Event =
   | DeleteCert
   | RevokeCert
   | GetCertBody
+  | GetCertPrivateKey
+  | GetCertBundle
   | CreatePkiAlert
   | GetPkiAlert
   | UpdatePkiAlert

backend/src/ee/services/permission/project-permission.ts

@@ -17,6 +17,14 @@ export enum ProjectPermissionActions {
   Delete = "delete"
 }
 
+export enum ProjectPermissionCertificateActions {
+  Read = "read",
+  Create = "create",
+  Edit = "edit",
+  Delete = "delete",
+  ReadPrivateKey = "read-private-key"
+}
+
 export enum ProjectPermissionSecretActions {
   DescribeAndReadValue = "read",
   DescribeSecret = "describeSecret",
@@ -232,7 +240,7 @@ export type ProjectPermissionSet =
       ProjectPermissionSub.Identity | (ForcedSubject<ProjectPermissionSub.Identity> & IdentityManagementSubjectFields)
     ]
   | [ProjectPermissionActions, ProjectPermissionSub.CertificateAuthorities]
-  | [ProjectPermissionActions, ProjectPermissionSub.Certificates]
+  | [ProjectPermissionCertificateActions, ProjectPermissionSub.Certificates]
   | [ProjectPermissionActions, ProjectPermissionSub.CertificateTemplates]
   | [ProjectPermissionActions, ProjectPermissionSub.SshCertificateAuthorities]
   | [ProjectPermissionActions, ProjectPermissionSub.SshCertificates]
@@ -478,7 +486,7 @@ const GeneralPermissionSchema = [
   }),
   z.object({
     subject: z.literal(ProjectPermissionSub.Certificates).describe("The entity this permission pertains to."),
-    action: CASL_ACTION_SCHEMA_NATIVE_ENUM(ProjectPermissionActions).describe(
+    action: CASL_ACTION_SCHEMA_NATIVE_ENUM(ProjectPermissionCertificateActions).describe(
       "Describe what action an entity can take."
     )
   }),
@@ -688,7 +696,6 @@ const buildAdminPermissionRules = () => {
     ProjectPermissionSub.AuditLogs,
     ProjectPermissionSub.IpAllowList,
     ProjectPermissionSub.CertificateAuthorities,
-    ProjectPermissionSub.Certificates,
     ProjectPermissionSub.CertificateTemplates,
     ProjectPermissionSub.PkiAlerts,
     ProjectPermissionSub.PkiCollections,
@@ -708,6 +715,17 @@ const buildAdminPermissionRules = () => {
     );
   });
 
+  can(
+    [
+      ProjectPermissionCertificateActions.Read,
+      ProjectPermissionCertificateActions.Edit,
+      ProjectPermissionCertificateActions.Create,
+      ProjectPermissionCertificateActions.Delete,
+      ProjectPermissionCertificateActions.ReadPrivateKey
+    ],
+    ProjectPermissionSub.Certificates
+  );
+
   can(
     [
       ProjectPermissionSshHostActions.Edit,
@@ -965,10 +983,10 @@ const buildMemberPermissionRules = () => {
 
   can(
     [
-      ProjectPermissionActions.Read,
-      ProjectPermissionActions.Edit,
-      ProjectPermissionActions.Create,
-      ProjectPermissionActions.Delete
+      ProjectPermissionCertificateActions.Read,
+      ProjectPermissionCertificateActions.Edit,
+      ProjectPermissionCertificateActions.Create,
+      ProjectPermissionCertificateActions.Delete
     ],
     ProjectPermissionSub.Certificates
   );
@@ -1041,7 +1059,7 @@ const buildViewerPermissionRules = () => {
   can(ProjectPermissionActions.Read, ProjectPermissionSub.AuditLogs);
   can(ProjectPermissionActions.Read, ProjectPermissionSub.IpAllowList);
   can(ProjectPermissionActions.Read, ProjectPermissionSub.CertificateAuthorities);
-  can(ProjectPermissionActions.Read, ProjectPermissionSub.Certificates);
+  can(ProjectPermissionCertificateActions.Read, ProjectPermissionSub.Certificates);
   can(ProjectPermissionCmekActions.Read, ProjectPermissionSub.Cmek);
   can(ProjectPermissionActions.Read, ProjectPermissionSub.SshCertificates);
   can(ProjectPermissionActions.Read, ProjectPermissionSub.SshCertificateTemplates);

backend/src/lib/api-docs/constants.ts

@@ -1619,7 +1619,8 @@ export const CERTIFICATES = {
     serialNumber: "The serial number of the certificate to get the certificate body and certificate chain for.",
     certificate: "The certificate body of the certificate.",
     certificateChain: "The certificate chain of the certificate.",
-    serialNumberRes: "The serial number of the certificate."
+    serialNumberRes: "The serial number of the certificate.",
+    privateKey: "The private key of the certificate."
   }
 };
 

backend/src/server/lib/caching.ts

@@ -0,0 +1,8 @@
+import { FastifyReply } from "fastify";
+
+export const addNoCacheHeaders = (reply: FastifyReply) => {
+  void reply.header("Cache-Control", "no-store, no-cache, must-revalidate, proxy-revalidate");
+  void reply.header("Pragma", "no-cache");
+  void reply.header("Expires", "0");
+  void reply.header("Surrogate-Control", "no-store");
+};

backend/src/server/routes/index.ts

@@ -126,6 +126,7 @@ import { tokenDALFactory } from "@app/services/auth-token/auth-token-dal";
 import { tokenServiceFactory } from "@app/services/auth-token/auth-token-service";
 import { certificateBodyDALFactory } from "@app/services/certificate/certificate-body-dal";
 import { certificateDALFactory } from "@app/services/certificate/certificate-dal";
+import { certificateSecretDALFactory } from "@app/services/certificate/certificate-secret-dal";
 import { certificateServiceFactory } from "@app/services/certificate/certificate-service";
 import { certificateAuthorityCertDALFactory } from "@app/services/certificate-authority/certificate-authority-cert-dal";
 import { certificateAuthorityDALFactory } from "@app/services/certificate-authority/certificate-authority-dal";
@@ -812,6 +813,7 @@ export const registerRoutes = async (
 
   const certificateDAL = certificateDALFactory(db);
   const certificateBodyDAL = certificateBodyDALFactory(db);
+  const certificateSecretDAL = certificateSecretDALFactory(db);
 
   const pkiAlertDAL = pkiAlertDALFactory(db);
   const pkiCollectionDAL = pkiCollectionDALFactory(db);
@@ -820,6 +822,7 @@ export const registerRoutes = async (
   const certificateService = certificateServiceFactory({
     certificateDAL,
     certificateBodyDAL,
+    certificateSecretDAL,
     certificateAuthorityDAL,
     certificateAuthorityCertDAL,
     certificateAuthorityCrlDAL,
@@ -891,6 +894,7 @@ export const registerRoutes = async (
     certificateAuthorityQueue,
     certificateDAL,
     certificateBodyDAL,
+    certificateSecretDAL,
     pkiCollectionDAL,
     pkiCollectionItemDAL,
     projectDAL,

backend/src/server/routes/v1/certificate-router.ts

@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/no-floating-promises */
 import { z } from "zod";
 
 import { CertificatesSchema } from "@app/db/schemas";
@@ -5,6 +6,7 @@ import { EventType } from "@app/ee/services/audit-log/audit-log-types";
 import { ApiDocsTags, CERTIFICATE_AUTHORITIES, CERTIFICATES } from "@app/lib/api-docs";
 import { ms } from "@app/lib/ms";
 import { readLimit, writeLimit } from "@app/server/config/rateLimiter";
+import { addNoCacheHeaders } from "@app/server/lib/caching";
 import { getTelemetryDistinctId } from "@app/server/lib/telemetry";
 import { verifyAuth } from "@app/server/plugins/auth/verify-auth";
 import { AuthMode } from "@app/services/auth/auth-type";
@@ -64,6 +66,111 @@ export const registerCertRouter = async (server: FastifyZodProvider) => {
     }
   });
 
+  // TODO: In the future add support for other formats outside of PEM (such as DER). Adding a "format" query param may be best.
+  server.route({
+    method: "GET",
+    url: "/:serialNumber/private-key",
+    config: {
+      rateLimit: readLimit
+    },
+    onRequest: verifyAuth([AuthMode.JWT, AuthMode.IDENTITY_ACCESS_TOKEN]),
+    schema: {
+      hide: false,
+      tags: [ApiDocsTags.PkiCertificates],
+      description: "Get certificate private key",
+      params: z.object({
+        serialNumber: z.string().trim().describe(CERTIFICATES.GET.serialNumber)
+      }),
+      response: {
+        200: z.string().trim()
+      }
+    },
+    handler: async (req, reply) => {
+      const { ca, cert, certPrivateKey } = await server.services.certificate.getCertPrivateKey({
+        serialNumber: req.params.serialNumber,
+        actor: req.permission.type,
+        actorId: req.permission.id,
+        actorAuthMethod: req.permission.authMethod,
+        actorOrgId: req.permission.orgId
+      });
+
+      await server.services.auditLog.createAuditLog({
+        ...req.auditLogInfo,
+        projectId: ca.projectId,
+        event: {
+          type: EventType.GET_CERT_PRIVATE_KEY,
+          metadata: {
+            certId: cert.id,
+            cn: cert.commonName,
+            serialNumber: cert.serialNumber
+          }
+        }
+      });
+
+      addNoCacheHeaders(reply);
+
+      return certPrivateKey;
+    }
+  });
+
+  // TODO: In the future add support for other formats outside of PEM (such as DER). Adding a "format" query param may be best.
+  server.route({
+    method: "GET",
+    url: "/:serialNumber/bundle",
+    config: {
+      rateLimit: readLimit
+    },
+    onRequest: verifyAuth([AuthMode.JWT, AuthMode.IDENTITY_ACCESS_TOKEN]),
+    schema: {
+      hide: false,
+      tags: [ApiDocsTags.PkiCertificates],
+      description: "Get certificate bundle including the certificate, chain, and private key.",
+      params: z.object({
+        serialNumber: z.string().trim().describe(CERTIFICATES.GET_CERT.serialNumber)
+      }),
+      response: {
+        200: z.object({
+          certificate: z.string().trim().describe(CERTIFICATES.GET_CERT.certificate),
+          certificateChain: z.string().trim().nullish().describe(CERTIFICATES.GET_CERT.certificateChain),
+          privateKey: z.string().trim().describe(CERTIFICATES.GET_CERT.privateKey),
+          serialNumber: z.string().trim().describe(CERTIFICATES.GET_CERT.serialNumberRes)
+        })
+      }
+    },
+    handler: async (req, reply) => {
+      const { certificate, certificateChain, serialNumber, cert, ca, privateKey } =
+        await server.services.certificate.getCertBundle({
+          serialNumber: req.params.serialNumber,
+          actor: req.permission.type,
+          actorId: req.permission.id,
+          actorAuthMethod: req.permission.authMethod,
+          actorOrgId: req.permission.orgId
+        });
+
+      await server.services.auditLog.createAuditLog({
+        ...req.auditLogInfo,
+        projectId: ca.projectId,
+        event: {
+          type: EventType.GET_CERT_BUNDLE,
+          metadata: {
+            certId: cert.id,
+            cn: cert.commonName,
+            serialNumber: cert.serialNumber
+          }
+        }
+      });
+
+      addNoCacheHeaders(reply);
+
+      return {
+        certificate,
+        certificateChain,
+        serialNumber,
+        privateKey
+      };
+    }
+  });
+
   server.route({
     method: "POST",
     url: "/issue-certificate",
@@ -411,7 +518,7 @@ export const registerCertRouter = async (server: FastifyZodProvider) => {
       response: {
         200: z.object({
           certificate: z.string().trim().describe(CERTIFICATES.GET_CERT.certificate),
-          certificateChain: z.string().trim().describe(CERTIFICATES.GET_CERT.certificateChain),
+          certificateChain: z.string().trim().nullish().describe(CERTIFICATES.GET_CERT.certificateChain),
           serialNumber: z.string().trim().describe(CERTIFICATES.GET_CERT.serialNumberRes)
         })
       }
@@ -429,7 +536,7 @@ export const registerCertRouter = async (server: FastifyZodProvider) => {
         ...req.auditLogInfo,
         projectId: ca.projectId,
         event: {
-          type: EventType.DELETE_CERT,
+          type: EventType.GET_CERT_BODY,
           metadata: {
             certId: cert.id,
             cn: cert.commonName,

backend/src/services/certificate-authority/certificate-authority-service.ts

@@ -6,7 +6,11 @@ import { z } from "zod";
 
 import { ActionProjectType, ProjectType, TCertificateAuthorities, TCertificateTemplates } from "@app/db/schemas";
 import { TPermissionServiceFactory } from "@app/ee/services/permission/permission-service";
-import { ProjectPermissionActions, ProjectPermissionSub } from "@app/ee/services/permission/project-permission";
+import {
+  ProjectPermissionActions,
+  ProjectPermissionCertificateActions,
+  ProjectPermissionSub
+} from "@app/ee/services/permission/project-permission";
 import { extractX509CertFromChain } from "@app/lib/certificates/extract-certificate";
 import { getConfig } from "@app/lib/config/env";
 import { BadRequestError, NotFoundError } from "@app/lib/errors";
@@ -21,6 +25,7 @@ import { TProjectDALFactory } from "@app/services/project/project-dal";
 import { getProjectKmsCertificateKeyId } from "@app/services/project/project-fns";
 
 import { TCertificateAuthorityCrlDALFactory } from "../../ee/services/certificate-authority-crl/certificate-authority-crl-dal";
+import { TCertificateSecretDALFactory } from "../certificate/certificate-secret-dal";
 import {
   CertExtendedKeyUsage,
   CertExtendedKeyUsageOIDToName,
@@ -75,6 +80,7 @@ type TCertificateAuthorityServiceFactoryDep = {
   certificateTemplateDAL: Pick<TCertificateTemplateDALFactory, "getById" | "find">;
   certificateAuthorityQueue: TCertificateAuthorityQueueFactory; // TODO: Pick
   certificateDAL: Pick<TCertificateDALFactory, "transaction" | "create" | "find">;
+  certificateSecretDAL: Pick<TCertificateSecretDALFactory, "create">;
   certificateBodyDAL: Pick<TCertificateBodyDALFactory, "create">;
   pkiCollectionDAL: Pick<TPkiCollectionDALFactory, "findById">;
   pkiCollectionItemDAL: Pick<TPkiCollectionItemDALFactory, "create">;
@@ -96,6 +102,7 @@ export const certificateAuthorityServiceFactory = ({
   certificateTemplateDAL,
   certificateDAL,
   certificateBodyDAL,
+  certificateSecretDAL,
   pkiCollectionDAL,
   pkiCollectionItemDAL,
   projectDAL,
@@ -1157,7 +1164,10 @@ export const certificateAuthorityServiceFactory = ({
       actionProjectType: ActionProjectType.CertificateManager
     });
 
-    ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionActions.Create, ProjectPermissionSub.Certificates);
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.Create,
+      ProjectPermissionSub.Certificates
+    );
 
     if (ca.status === CaStatus.DISABLED) throw new BadRequestError({ message: "CA is disabled" });
     if (!ca.activeCaCertId) throw new BadRequestError({ message: "CA does not have a certificate installed" });
@@ -1373,6 +1383,23 @@ export const certificateAuthorityServiceFactory = ({
     const { cipherTextBlob: encryptedCertificate } = await kmsEncryptor({
       plainText: Buffer.from(new Uint8Array(leafCert.rawData))
     });
+    const { cipherTextBlob: encryptedPrivateKey } = await kmsEncryptor({
+      plainText: Buffer.from(skLeaf)
+    });
+
+    const { caCert: issuingCaCertificate, caCertChain } = await getCaCertChain({
+      caCertId: caCert.id,
+      certificateAuthorityDAL,
+      certificateAuthorityCertDAL,
+      projectDAL,
+      kmsService
+    });
+
+    const certificateChainPem = `${issuingCaCertificate}\n${caCertChain}`.trim();
+
+    const { cipherTextBlob: encryptedCertificateChain } = await kmsEncryptor({
+      plainText: Buffer.from(certificateChainPem)
+    });
 
     await certificateDAL.transaction(async (tx) => {
       const cert = await certificateDAL.create(
@@ -1396,7 +1423,16 @@ export const certificateAuthorityServiceFactory = ({
       await certificateBodyDAL.create(
         {
           certId: cert.id,
-          encryptedCertificate
+          encryptedCertificate,
+          encryptedCertificateChain
+        },
+        tx
+      );
+
+      await certificateSecretDAL.create(
+        {
+          certId: cert.id,
+          encryptedPrivateKey
         },
         tx
       );
@@ -1414,17 +1450,9 @@ export const certificateAuthorityServiceFactory = ({
       return cert;
     });
 
-    const { caCert: issuingCaCertificate, caCertChain } = await getCaCertChain({
-      caCertId: caCert.id,
-      certificateAuthorityDAL,
-      certificateAuthorityCertDAL,
-      projectDAL,
-      kmsService
-    });
-
     return {
       certificate: leafCert.toString("pem"),
-      certificateChain: `${issuingCaCertificate}\n${caCertChain}`.trim(),
+      certificateChain: certificateChainPem,
       issuingCaCertificate,
       privateKey: skLeaf,
       serialNumber,
@@ -1487,7 +1515,7 @@ export const certificateAuthorityServiceFactory = ({
       });
 
       ForbiddenError.from(permission).throwUnlessCan(
-        ProjectPermissionActions.Create,
+        ProjectPermissionCertificateActions.Create,
         ProjectPermissionSub.Certificates
       );
     }

backend/src/services/certificate/certificate-fns.ts

@@ -1,6 +1,11 @@
+import crypto from "node:crypto";
+
 import * as x509 from "@peculiar/x509";
 
-import { CrlReason } from "./certificate-types";
+import { BadRequestError, NotFoundError } from "@app/lib/errors";
+
+import { getProjectKmsCertificateKeyId } from "../project/project-fns";
+import { CrlReason, TBuildCertificateChainDTO, TGetCertificateCredentialsDTO } from "./certificate-types";
 
 export const revocationReasonToCrlCode = (crlReason: CrlReason) => {
   switch (crlReason) {
@@ -46,3 +51,73 @@ export const constructPemChainFromCerts = (certificates: x509.X509Certificate[])
     .map((cert) => cert.toString("pem"))
     .join("\n")
     .trim();
+
+/**
+ * Return the public and private key of certificate
+ * Note: credentials are returned as PEM strings
+ */
+export const getCertificateCredentials = async ({
+  certId,
+  projectId,
+  certificateSecretDAL,
+  projectDAL,
+  kmsService
+}: TGetCertificateCredentialsDTO) => {
+  const certificateSecret = await certificateSecretDAL.findOne({ certId });
+  if (!certificateSecret)
+    throw new NotFoundError({ message: `Certificate secret for certificate with ID '${certId}' not found` });
+
+  const keyId = await getProjectKmsCertificateKeyId({
+    projectId,
+    projectDAL,
+    kmsService
+  });
+  const kmsDecryptor = await kmsService.decryptWithKmsKey({
+    kmsId: keyId
+  });
+  const decryptedPrivateKey = await kmsDecryptor({
+    cipherTextBlob: certificateSecret.encryptedPrivateKey
+  });
+
+  try {
+    const skObj = crypto.createPrivateKey({ key: decryptedPrivateKey, format: "pem", type: "pkcs8" });
+    const certPrivateKey = skObj.export({ format: "pem", type: "pkcs8" }).toString();
+
+    const pkObj = crypto.createPublicKey(skObj);
+    const certPublicKey = pkObj.export({ format: "pem", type: "spki" }).toString();
+
+    return {
+      certificateSecret,
+      certPrivateKey,
+      certPublicKey
+    };
+  } catch (error) {
+    throw new BadRequestError({ message: `Failed to process private key for certificate with ID '${certId}'` });
+  }
+};
+
+// If the certificate was generated after ~05/01/25 it will have a encryptedCertificateChain attached to it's body
+// Otherwise we'll fallback to manually building the chain
+export const buildCertificateChain = async ({
+  caCert,
+  caCertChain,
+  encryptedCertificateChain,
+  kmsService,
+  kmsId
+}: TBuildCertificateChainDTO) => {
+  if (!encryptedCertificateChain && (!caCert || !caCertChain)) {
+    return null;
+  }
+
+  let certificateChain = `${caCert}\n${caCertChain}`.trim();
+
+  if (encryptedCertificateChain) {
+    const kmsDecryptor = await kmsService.decryptWithKmsKey({ kmsId });
+    const decryptedCertChain = await kmsDecryptor({
+      cipherTextBlob: encryptedCertificateChain
+    });
+    certificateChain = decryptedCertChain.toString();
+  }
+
+  return certificateChain;
+};

backend/src/services/certificate/certificate-secret-dal.ts

@@ -0,0 +1,10 @@
+import { TDbClient } from "@app/db";
+import { TableName } from "@app/db/schemas";
+import { ormify } from "@app/lib/knex";
+
+export type TCertificateSecretDALFactory = ReturnType<typeof certificateSecretDALFactory>;
+
+export const certificateSecretDALFactory = (db: TDbClient) => {
+  const certSecretOrm = ormify(db, TableName.CertificateSecret);
+  return certSecretOrm;
+};

backend/src/services/certificate/certificate-service.ts

@@ -4,7 +4,10 @@ import * as x509 from "@peculiar/x509";
 import { ActionProjectType } from "@app/db/schemas";
 import { TCertificateAuthorityCrlDALFactory } from "@app/ee/services/certificate-authority-crl/certificate-authority-crl-dal";
 import { TPermissionServiceFactory } from "@app/ee/services/permission/permission-service";
-import { ProjectPermissionActions, ProjectPermissionSub } from "@app/ee/services/permission/project-permission";
+import {
+  ProjectPermissionCertificateActions,
+  ProjectPermissionSub
+} from "@app/ee/services/permission/project-permission";
 import { TCertificateBodyDALFactory } from "@app/services/certificate/certificate-body-dal";
 import { TCertificateDALFactory } from "@app/services/certificate/certificate-dal";
 import { TCertificateAuthorityCertDALFactory } from "@app/services/certificate-authority/certificate-authority-cert-dal";
@@ -15,11 +18,21 @@ import { TProjectDALFactory } from "@app/services/project/project-dal";
 import { getProjectKmsCertificateKeyId } from "@app/services/project/project-fns";
 
 import { getCaCertChain, rebuildCaCrl } from "../certificate-authority/certificate-authority-fns";
-import { revocationReasonToCrlCode } from "./certificate-fns";
-import { CertStatus, TDeleteCertDTO, TGetCertBodyDTO, TGetCertDTO, TRevokeCertDTO } from "./certificate-types";
+import { buildCertificateChain, getCertificateCredentials, revocationReasonToCrlCode } from "./certificate-fns";
+import { TCertificateSecretDALFactory } from "./certificate-secret-dal";
+import {
+  CertStatus,
+  TDeleteCertDTO,
+  TGetCertBodyDTO,
+  TGetCertBundleDTO,
+  TGetCertDTO,
+  TGetCertPrivateKeyDTO,
+  TRevokeCertDTO
+} from "./certificate-types";
 
 type TCertificateServiceFactoryDep = {
   certificateDAL: Pick<TCertificateDALFactory, "findOne" | "deleteById" | "update" | "find">;
+  certificateSecretDAL: Pick<TCertificateSecretDALFactory, "findOne">;
   certificateBodyDAL: Pick<TCertificateBodyDALFactory, "findOne">;
   certificateAuthorityDAL: Pick<TCertificateAuthorityDALFactory, "findById">;
   certificateAuthorityCertDAL: Pick<TCertificateAuthorityCertDALFactory, "findById">;
@@ -34,6 +47,7 @@ export type TCertificateServiceFactory = ReturnType<typeof certificateServiceFac
 
 export const certificateServiceFactory = ({
   certificateDAL,
+  certificateSecretDAL,
   certificateBodyDAL,
   certificateAuthorityDAL,
   certificateAuthorityCertDAL,
@@ -59,7 +73,10 @@ export const certificateServiceFactory = ({
       actionProjectType: ActionProjectType.CertificateManager
     });
 
-    ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionActions.Read, ProjectPermissionSub.Certificates);
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.Read,
+      ProjectPermissionSub.Certificates
+    );
 
     return {
       cert,
@@ -67,6 +84,48 @@ export const certificateServiceFactory = ({
     };
   };
 
+  /**
+   * Get certificate private key.
+   */
+  const getCertPrivateKey = async ({
+    serialNumber,
+    actorId,
+    actorAuthMethod,
+    actor,
+    actorOrgId
+  }: TGetCertPrivateKeyDTO) => {
+    const cert = await certificateDAL.findOne({ serialNumber });
+    const ca = await certificateAuthorityDAL.findById(cert.caId);
+
+    const { permission } = await permissionService.getProjectPermission({
+      actor,
+      actorId,
+      projectId: ca.projectId,
+      actorAuthMethod,
+      actorOrgId,
+      actionProjectType: ActionProjectType.CertificateManager
+    });
+
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.ReadPrivateKey,
+      ProjectPermissionSub.Certificates
+    );
+
+    const { certPrivateKey } = await getCertificateCredentials({
+      certId: cert.id,
+      projectId: ca.projectId,
+      certificateSecretDAL,
+      projectDAL,
+      kmsService
+    });
+
+    return {
+      ca,
+      cert,
+      certPrivateKey
+    };
+  };
+
   /**
    * Delete certificate with serial number [serialNumber]
    */
@@ -83,7 +142,10 @@ export const certificateServiceFactory = ({
       actionProjectType: ActionProjectType.CertificateManager
     });
 
-    ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionActions.Delete, ProjectPermissionSub.Certificates);
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.Delete,
+      ProjectPermissionSub.Certificates
+    );
 
     const deletedCert = await certificateDAL.deleteById(cert.id);
 
@@ -118,7 +180,10 @@ export const certificateServiceFactory = ({
       actionProjectType: ActionProjectType.CertificateManager
     });
 
-    ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionActions.Delete, ProjectPermissionSub.Certificates);
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.Delete,
+      ProjectPermissionSub.Certificates
+    );
 
     if (cert.status === CertStatus.REVOKED) throw new Error("Certificate already revoked");
 
@@ -165,7 +230,10 @@ export const certificateServiceFactory = ({
       actionProjectType: ActionProjectType.CertificateManager
     });
 
-    ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionActions.Read, ProjectPermissionSub.Certificates);
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.Read,
+      ProjectPermissionSub.Certificates
+    );
 
     const certBody = await certificateBodyDAL.findOne({ certId: cert.id });
 
@@ -192,19 +260,107 @@ export const certificateServiceFactory = ({
       kmsService
     });
 
+    const certificateChain = await buildCertificateChain({
+      caCert,
+      caCertChain,
+      kmsId: certificateManagerKeyId,
+      kmsService,
+      encryptedCertificateChain: certBody.encryptedCertificateChain || undefined
+    });
+
     return {
       certificate: certObj.toString("pem"),
-      certificateChain: `${caCert}\n${caCertChain}`.trim(),
+      certificateChain,
       serialNumber: certObj.serialNumber,
       cert,
       ca
     };
   };
 
+  /**
+   * Return certificate body and certificate chain for certificate with
+   * serial number [serialNumber]
+   */
+  const getCertBundle = async ({ serialNumber, actorId, actorAuthMethod, actor, actorOrgId }: TGetCertBundleDTO) => {
+    const cert = await certificateDAL.findOne({ serialNumber });
+    const ca = await certificateAuthorityDAL.findById(cert.caId);
+
+    const { permission } = await permissionService.getProjectPermission({
+      actor,
+      actorId,
+      projectId: ca.projectId,
+      actorAuthMethod,
+      actorOrgId,
+      actionProjectType: ActionProjectType.CertificateManager
+    });
+
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.Read,
+      ProjectPermissionSub.Certificates
+    );
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.ReadPrivateKey,
+      ProjectPermissionSub.Certificates
+    );
+
+    const certBody = await certificateBodyDAL.findOne({ certId: cert.id });
+
+    const certificateManagerKeyId = await getProjectKmsCertificateKeyId({
+      projectId: ca.projectId,
+      projectDAL,
+      kmsService
+    });
+
+    const kmsDecryptor = await kmsService.decryptWithKmsKey({
+      kmsId: certificateManagerKeyId
+    });
+    const decryptedCert = await kmsDecryptor({
+      cipherTextBlob: certBody.encryptedCertificate
+    });
+
+    const certObj = new x509.X509Certificate(decryptedCert);
+    const certificate = certObj.toString("pem");
+
+    const { caCert, caCertChain } = await getCaCertChain({
+      caCertId: cert.caCertId,
+      certificateAuthorityDAL,
+      certificateAuthorityCertDAL,
+      projectDAL,
+      kmsService
+    });
+
+    const certificateChain = await buildCertificateChain({
+      caCert,
+      caCertChain,
+      kmsId: certificateManagerKeyId,
+      kmsService,
+      encryptedCertificateChain: certBody.encryptedCertificateChain || undefined
+    });
+
+    const { certPrivateKey } = await getCertificateCredentials({
+      certId: cert.id,
+      projectId: ca.projectId,
+      certificateSecretDAL,
+      projectDAL,
+      kmsService
+    });
+
+    return {
+      certificate,
+      certificateChain,
+      privateKey: certPrivateKey,
+      serialNumber,
+      cert,
+      ca
+    };
+  };
+
   return {
     getCert,
+    getCertPrivateKey,
     deleteCert,
     revokeCert,
-    getCertBody
+    getCertBody,
+    getCertBundle
   };
 };

backend/src/services/certificate/certificate-types.ts

@@ -2,6 +2,10 @@ import * as x509 from "@peculiar/x509";
 
 import { TProjectPermission } from "@app/lib/types";
 
+import { TKmsServiceFactory } from "../kms/kms-service";
+import { TProjectDALFactory } from "../project/project-dal";
+import { TCertificateSecretDALFactory } from "./certificate-secret-dal";
+
 export enum CertStatus {
   ACTIVE = "active",
   REVOKED = "revoked"
@@ -73,3 +77,27 @@ export type TRevokeCertDTO = {
 export type TGetCertBodyDTO = {
   serialNumber: string;
 } & Omit<TProjectPermission, "projectId">;
+
+export type TGetCertPrivateKeyDTO = {
+  serialNumber: string;
+} & Omit<TProjectPermission, "projectId">;
+
+export type TGetCertBundleDTO = {
+  serialNumber: string;
+} & Omit<TProjectPermission, "projectId">;
+
+export type TGetCertificateCredentialsDTO = {
+  certId: string;
+  projectId: string;
+  certificateSecretDAL: Pick<TCertificateSecretDALFactory, "findOne">;
+  projectDAL: Pick<TProjectDALFactory, "findOne" | "updateById" | "transaction">;
+  kmsService: Pick<TKmsServiceFactory, "decryptWithKmsKey" | "generateKmsKey">;
+};
+
+export type TBuildCertificateChainDTO = {
+  caCert?: string;
+  caCertChain?: string;
+  encryptedCertificateChain?: Buffer;
+  kmsService: Pick<TKmsServiceFactory, "decryptWithKmsKey">;
+  kmsId: string;
+};

backend/src/services/project/project-service.ts

@@ -14,6 +14,7 @@ import { throwIfMissingSecretReadValueOrDescribePermission } from "@app/ee/servi
 import { TPermissionServiceFactory } from "@app/ee/services/permission/permission-service";
 import {
   ProjectPermissionActions,
+  ProjectPermissionCertificateActions,
   ProjectPermissionSecretActions,
   ProjectPermissionSshHostActions,
   ProjectPermissionSub
@@ -948,7 +949,10 @@ export const projectServiceFactory = ({
       actionProjectType: ActionProjectType.CertificateManager
     });
 
-    ForbiddenError.from(permission).throwUnlessCan(ProjectPermissionActions.Read, ProjectPermissionSub.Certificates);
+    ForbiddenError.from(permission).throwUnlessCan(
+      ProjectPermissionCertificateActions.Read,
+      ProjectPermissionSub.Certificates
+    );
 
     const cas = await certificateAuthorityDAL.find({ projectId });