Project: pro-desktop · Branch: master · Mode:  · Model: claude-haiku-4-5-20251001

Stats: 1 user messages, 24 tool calls, tools used: Bash, Grep, Read, Glob.

Conversation

Turn 1 — User

Find the CertificateService implementation that's used in VauValidation.verifyCertificate(). I need to understand:
1. Where is CertificateService located?
2. What methods does it provide?
3. Does it support OCSP or revocation checking?
4. What are the parameters and return types?
5. How does it interact with the TI Connector?

Look in the gematik-related modules, particularly anything related to certificate validation or the connector.

Turn 1 — Assistant

I'll help you find the CertificateService implementation used in VauValidation.verifyCertificate(). Let me start by searching for the relevant files.

Tools used:

- Bash: find /Users/USER/workspace/doctolib/doctolib-pro-desktop -type f -name ".ts" -o -name ".java" | grep -iE "(certificate|vau|validation)" | head -20

Tool results:

  → result (ok): /Users/USER/workspace/doctolib/doctolib-pro-desktop/config/validation/markdown/validateLinks.ts
/Users/USER/workspace/doctolib/doctolib-pro-desktop/config/validation/code/validateCode.ts
/Users/USER/workspace/doctolib/doctolib-pro-desktop/config/validation/dependencies/validateElectronVersions.ts
/Users/USER/workspace/doctolib/doctolib-pro-desktop/config/validation/debug-menu/__tests__/validateDebugMenuCategories.test.ts
/Users/USER/workspace/doctolib/doctolib-pro-desktop/config/validation/debug
…(truncated, 1666 more chars)

Let me search more specifically for VauValidation and CertificateService:

Tools used:

- Grep: VauValidation|verifyCertificate in /Users/USER/workspace/doctolib/doctolib-pro-desktop

Tool results:

  → result (ok): Found 12 files
src/modules/kbv-ti-connect/services/types.ts
src/modules/kbv-ti-connect/services/certificate-service/soap-client.ts
src/modules/gematik-idp-vau/services/__tests_electron__/vauValidation.test.ts
src/modules/kbv-ti-connect/services/index.ts
src/modules/kbv-ti-connect/services/__tests__/ti-connect-logs.test.ts
src/modules/gematik-idp-vau/services/vauValidation.ts
src/modules/gematik-idp-vau/services/vauService.ts
src/modules/gematik-idp-vau/services/__tests_electron__/vauService.test
…(truncated, 331 more chars)

Great! Now let me read the key files:

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/gematik-idp-vau/services/vauValidation.ts

Tool results:

  → result (ok): 1→import { BasicOCSPResponse, Certificate, OCSPResponse } from 'pkijs'
     2→
     3→import { CertificateService } from '@module/kbv-ti-connect/services/certificate-service'
     4→import ConfigurationService from '@module/kbv-ti-connect/services/configuration-service'
     5→import {
     6→  EMPTY_RESPONSE_BYTES_ERROR,
     7→  ENCRYPTION_CERTIFICATE_REVOCATION_ERROR,
     8→  VAU_ENCRYPTION_CERTIFICATE_INVALID_ERROR,
     9→} from '@module/gematik-idp-vau/constants/constants'
    10→import t
…(truncated, 3820 more chars)

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/types.ts

Tool results:

  → result (ok): 1→export type TiConnectAction =
     2→  | 'startConnection'
     3→  | 'testConnectorConfiguration'
     4→  | 'subscribeToEventService'
     5→  | 'unsubscribeFromEventService'
     6→  | 'readVsd'
     7→  | 'readKvk'
     8→  | 'getSmcbPinStatus'
     9→  | 'changePin'
    10→  | 'handleSmcb'
    11→  | 'unblockPin'
    12→  | 'enableOfflineMode'
    13→  | 'enableOnlineMode'
    14→  | 'verifyCertificate'
    15→  | 'readCardCertificate'
    16→  | 'externalAuthenticate'
    17→  | 'idpAuth
…(truncated, 8274 more chars)

Tools used:

- Glob: /certificate-service//.ts in /Users/USER/workspace/doctolib/doctolib-pro-desktop/src

Tool results:

  → result (ok): /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/certificate-service/index.ts
/Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/certificate-service/__tests__/soap-client.test.ts
/Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/certificate-service/soap-client.ts

Now let me read the CertificateService implementation files:

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/certificate-service/index.ts

Tool results:

  → result (ok): 1→export { default as CertificateService } from './soap-client'
     2→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/certificate-service/soap-client.ts

Tool results:

  → result (ok): 1→import { Client, createClientAsync } from 'soap'
     2→
     3→import { tiConnectModuleMetadata } from '@module/kbv-ti-connect/constants/module'
     4→import { ConnectorContext, CryptType } from '@module/kbv-ti-connect/services/types'
     5→import {
     6→  INVALID_CARD_HANDLE_ERR_MESSAGE,
     7→  INVALID_X509_CERT_ERR_MESSAGE,
     8→  SUPPORTED_SERVICE_ENDPOINT_VERSIONS,
     9→} from '@module/kbv-ti-connect/services/constants'
    10→import { SoapClientOptions } from '@module/gematik-c
…(truncated, 15153 more chars)

Now let me search for more information about how OCSP and revocation checking work, and the interaction with the TI Connector:

Tools used:

- Grep: VerifyCertificateAsync|OperationResult|Status\.Result in /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/commonApiTypes.ts

Tool results:

  → result (ok): 1→export interface OperationStatus {
     2→  Status: OperationResult
     3→}
     4→
     5→export interface OperationResult {
     6→  Result: 'OK' | 'Warning'
     7→  Error?: string
     8→}
     9→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions a
…(truncated, 42 more chars)

Tool results:

  → result (ok): Found 8 files
src/modules/kbv-ti-connect/services/qes-signature/index.ts
src/modules/kbv-ti-connect/services/event-service/soap-client.ts
src/modules/kbv-ti-connect/services/event-service/__tests__/event-service.test.ts
src/modules/kbv-ti-connect/services/certificate-service/soap-client.ts
src/modules/kbv-ti-connect/services/auth-signature-service/soap-client.ts
src/modules/kbv-ti-connect/services/card-service/soap-client.ts
src/modules/kbv-ti-connect/services/certificate-service/__tests__/soap-
…(truncated, 68 more chars)

Let me also check the test file to understand how CertificateService is used:

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/certificate-service/__tests__/soap-client.test.ts

Tool results:

  → result (ok): 1→import  as soap from 'soap'
     2→
     3→import { smcb } from '@module/kbv-ti-connect/services/vsd-service/mock/data'
     4→import { testStore } from '@module/kbv-ti-connect/services/mock/mockStore'
     5→import  as soapHelper from '@module/kbv-ti-connect/services/soap-client-helpers'
     6→import { buildServiceEndpoints } from '@module/kbv-ti-connect/services/service-directory-service/response-parser'
     7→import { TiConnectRepository } from '@module/kbv-ti-connect/services/ti-connec
…(truncated, 22654 more chars)

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/gematik-idp-vau/services/__tests_electron__/vauValidation.test.ts

Tool results:

  → result (ok): 1→import type { OCSPResponse } from 'pkijs'
     2→
     3→import { CertificateService } from '@module/kbv-ti-connect/services/certificate-service'
     4→import { mockConfigurationService } from '@module/kbv-ti-connect/services/configuration-service/configurationService.mock'
     5→import type { VerifyCertificateResponseMessage } from '@module/kbv-ti-connect/services/certificate-service/soap-client'
     6→import { VauValidation } from '@module/gematik-idp-vau/services/vauValidation'
     7→im
…(truncated, 3976 more chars)

Now let me check the constants file and understand more about the WSDL:

Tools used:

- Glob: /certificate-service.wsdl in /Users/USER/workspace/doctolib/doctolib-pro-desktop

Tools used:

- Grep: serviceWsdlPathWithVersion|CertificateService in /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services

Tool results:

  → result (ok): Found 31 files
src/modules/kbv-ti-connect/services/soap-client-helpers.ts
src/modules/kbv-ti-connect/services/types.ts
src/modules/kbv-ti-connect/services/service-directory-service/__tests__/service-directory-service.test.ts
src/modules/kbv-ti-connect/services/event-service/soap-client.ts
src/modules/kbv-ti-connect/services/event-service/__tests__/soap-client.test.ts
src/modules/kbv-ti-connect/services/connector-wsdls/conn/SignatureService_V7_4_2.xsd
src/modules/kbv-ti-connect/services/connector
…(truncated, 1810 more chars)

Tool results:

  → result (ok): No files found

Great! Now let me read the WSDL and XSD files to understand the service definition:

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/connector-wsdls/conn/CertificateService_v6_0_1.wsdl

Tool results:

  → result (ok): 1→<?xml version="1.0" encoding="UTF-8"?>
     2→
     3→<definitions xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:CERT="http://ws.gematik.de/conn/CertificateService/v6.0" xmlns:CERTW="http://ws.gematik.de/conn/CertificateService/WSDL/v6.0" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:CCTX="http://ws.gematik.de/conn/ConnectorContext/v2.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:GERROR="http://ws.gematik.de/tel/error/v2
…(truncated, 4954 more chars)

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/constants.ts

Tool results:

  → result (ok): 1→export const SERVICE_DIRECTORY_ENDPOINT = '/connector.sds'
     2→
     3→// FHIR-1366: Only actual wsdls that exist in DDV are listed here
     4→export const SUPPORTED_SERVICE_ENDPOINT_VERSIONS = {
     5→  PHRService: ['1.3.0'],
     6→  CertificateService: ['6.0.1'],
     7→  DPEService: ['1.0.0'],
     8→  LocalIdpService: ['1.0.1'],
     9→  KVKService: ['4.0.0'],
    10→  AMTSService: ['1.0.0'],
    11→  CardService: ['8.1.0'],
    12→  NFDService: ['1.0.0'],
    13→  EventService: ['7.
…(truncated, 968 more chars)

Now let me read the XSD file to see the detailed schema:

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/connector-wsdls/conn/CertificateService_v6_0_2.xsd

Tool results:

  → result (ok): 1→<?xml version="1.0" encoding="UTF-8"?>
     2→
     3→
     4→
     3→
     4→
     9→<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:CERTCMN="http://ws.gematik.de/conn/CertificateServic
…(truncated, 4350 more chars)

Tools used:

- Grep: JWKSignature|verify in /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/gematik-crypto

Tool results:

  → result (ok): Found 19 files
src/modules/gematik-crypto/services/node/jose/index.ts
src/modules/gematik-crypto/services/crypto-adapter/adapter.ts
src/modules/gematik-crypto/services/utils/__tests__/sensitiveDataHandler.test.ts
src/modules/gematik-crypto/services/docto-crypt/__tests_electron__/docto-crypt-executor.test.ts
src/modules/gematik-crypto/services/node/ldap/ldapClient.ts
src/modules/gematik-crypto/services/docto-crypt/types.ts
src/modules/gematik-crypto/services/docto-crypt/ldap/ldapClient.ts
src/mod
…(truncated, 805 more chars)

Perfect! Now let me read the JWKSignature file to understand how it works:

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/gematik-crypto/services/docto-crypt/signature/JWKSignature.ts

Tool results:

  → result (ok): 1→import { DoctoCryptExecutor } from '@module/gematik-crypto'
     2→
     3→import type { JWKSignatureVerifyParams, JWKSignatureVerificationResult } from '../types'
     4→
     5→export class JWKSignature {
     6→  static async verify(params: JWKSignatureVerifyParams): Promise<void> {
     7→    const { payload, signatureValue, rawSignerCertificate } = params
     8→
     9→    // Convert Uint8Array to base64 for CLI
    10→    const payloadBase64 = Buffer.from(payload).toString('base64')
   
…(truncated, 1098 more chars)

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/gematik-idp-vau/constants/constants.ts

Tool results:

  → result (ok): 1→export const VAU_API_ERROR = 'An error occurred during request to VAU.'
     2→export const VAU_FETCH_CERTIFICATE_ERROR = 'An error occurred while fetching VAU public certificate.'
     3→export const VAU_OCSP_REQUEST_ERROR = 'An error occurred while fetch OCSP response from VAU.'
     4→export const VAU_ENCRYPTION_CERTIFICATE_INVALID_ERROR = 'The retrieved VAU encryption certificate is not valid'
     5→export const EMPTY_RESPONSE_BYTES_ERROR = 'No "ResponseBytes" in the OCSP Response - nothi
…(truncated, 482 more chars)

Excellent! Now let me check the gematik-crypto types to understand the signature interfaces:

Tools used:

- Grep: JWKSignatureVerifyParams|JWKSignatureVerificationResult in /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/gematik-crypto

Tool results:

  → result (ok): Found 2 files
src/modules/gematik-crypto/services/docto-crypt/types.ts
src/modules/gematik-crypto/services/docto-crypt/signature/JWKSignature.ts

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/gematik-crypto/services/docto-crypt/types.ts

Tool results:

  → result (ok): 1→import { JWS as NodeJWS } from '@doctolib/node-jose'
     2→
     3→import type { EccCertificate, EccJwk } from '@module/gematik-crypto'
     4→
     5→export interface JweFields {
     6→  exp?: number
     7→  cty?: string
     8→  kid?: string
     9→}
    10→
    11→export interface JWKOutput {
    12→  privateKey?: {
    13→    use: string
    14→    kid: string
    15→    kty: string
    16→    crv: string
    17→    x: string
    18→    y: string
    19→    d: string
    20→    x5t?: st
…(truncated, 2953 more chars)

Perfect! Now let me gather one more piece of information about the configuration service:

Tools used:

- Grep: class ConfigurationService|constructor|context in /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/configuration-service

Tool results:

  → result (ok): Found 3 files
src/modules/kbv-ti-connect/services/configuration-service/__tests__/index.test.ts
src/modules/kbv-ti-connect/services/configuration-service/configurationService.mock.ts
src/modules/kbv-ti-connect/services/configuration-service/index.ts

Tools used:

- Read: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/configuration-service/index.ts (1–100)

Tool results:

  → result (ok): 1→import i18n from 'i18next'
     2→
     3→import {
     4→  ConnectorConfiguration,
     5→  ConnectorContext,
     6→  ConnectorContextInput,
     7→  CryptType,
     8→} from '@module/kbv-ti-connect/services/types'
     9→
    10→import { extraLogParser, getNestedKeys } from 'src/utils/extraLogParser.ts'
    11→
    12→import { TiConnectRepository } from '../ti-connect-repository'
    13→import { kbvTiConnectLogger } from '../logger'
    14→
    15→export default class ConfigurationService {
…(truncated, 3777 more chars)

Perfect! Now I have all the information I need. Let me create a comprehensive analysis document:

Summary

I've thoroughly explored the CertificateService implementation and its integration with VauValidation. Here's a comprehensive analysis:

---

1. Location of CertificateService

File Path: /Users/USER/workspace/doctolib/doctolib-pro-desktop/src/modules/kbv-ti-connect/services/certificate-service/

Structure:
- Main Implementation: soap-client.ts (429 lines)
- Export: index.ts (simple re-export)
- WSDL Definition: ../connector-wsdls/conn/CertificateService_v6_0_1.wsdl
- XSD Schema: ../connector-wsdls/conn/CertificateService_v6_0_2.xsd

---

2. Methods Provided by CertificateService

The CertificateService is implemented as a static utility class with the following public methods:

Primary Methods:

1. verifyCertificate(configurationService, traceId?, certificate?)
   - Purpose: Verifies the validity of an X.509 certificate
   - Parameters:
     - configurationService: ConfigurationService - Contains connector context
     - traceId?: string (default: 'unknown') - For logging/tracking
     - certificate?: string - Base64-encoded X.509 certificate
   - Returns: Promise<VerifyCertificateResponseMessage>
   - Throws: Error if certificate is null/undefined

2. readCardCertificate(configurationService, traceId?, cardHandle?, certRefList?, crypt?)
   - Purpose: Reads X.509 certificates from an inserted card
   - Parameters:
     - configurationService: ConfigurationService
     - traceId?: string
     - cardHandle?: string - Identifier for the card
     - certRefList?: string[] - Types of certificates (C.AUT, C.QES, C.SIG, C.ENC)
     - crypt?: CryptType - 'RSA' | 'ECC'
   - Returns: Promise<ReadCardCertificateResponseMessage>
   - Defaults: If no certRefList provided, defaults to ['C.AUT']
   - Throws: Error if cardHandle is null/undefined

3. checkCertificateExpiration(configurationService, traceId?, cardHandle?, crypt?)
   - Purpose: Checks expiration dates of certificates on cards
   - Parameters: Similar to readCardCertificate
   - Returns: Promise<CheckCertificateExpirationResponseMessage>

Event Handler Methods:
- handleVerifyCertificateEvent(configurationService, traceId?, certificate?)
- handleReadCardCertificateEvent(configurationService, traceId?, cardHandle?, certRefList?, crypt?)
- handleCheckCertificateExpirationEvent(configurationService, traceId?, cardHandle?, crypt?)

---

3. OCSP and Revocation Checking Support

Key Finding: CertificateService does NOT directly support OCSP. Instead, OCSP verification is handled separately in VauValidation.verifyCertificateRevocationStatus().

How OCSP Works:

The architecture splits responsibilities:

1. CertificateService - Verifies basic certificate validity (via TI Connector)
2. VauValidation - Handles OCSP-specific revocation checking

OCSP Implementation in VauValidation:
// From vauValidation.ts lines 28-70
verifyCertificateRevocationStatus(
  configurationService,
  encCertificateBuffer,  // The VAU encryption certificate
  ocspResponseBuffer      // OCSP response from VAU
)

OCSP Verification Steps:
1. Parse OCSP response using pkijs library
2. Extract signer certificate from OCSP response
3. Verify OCSP signer certificate using CertificateService.verifyCertificate()
4. Verify OCSP response signature using JWKSignature.verify()
5. Check certificate revocation status in OCSP response

---

4. Parameters and Return Types

Request Messages:

// VerifyCertificateRequestMessage
{
  Context: ConnectorContext           // Connector context (MandantId, ClientSystemId, etc.)
  X509Certificate: string             // Base64-encoded certificate
  VerificationTime?: Date             // Optional verification timestamp
}

// ReadCardCertificateMessage
{
  CardHandle: string
  Context: ConnectorContext
  CertRefList: { CertRef: CertRefType[] }  // ['C.AUT' | 'C.QES' | 'C.SIG' | 'C.ENC']
  Crypt?: CryptType                        // 'RSA' | 'ECC'
}

// CheckCertificateExpirationRequestMessage
{
  Context: ConnectorContext
  CardHandle?: string
  Crypt?: CryptType
}

Response Messages:

// VerifyCertificateResponseMessage
{
  Status: {
    Result: 'OK' | 'Warning'
    Error?: string
  }
  VerificationStatus: {
    VerificationResult: 'VALID' | 'INCONCLUSIVE' | 'INVALID'
    Error?: Error
  }
}

// ReadCardCertificateResponseMessage
{
  Status: { Result: 'OK' | 'Warning' }
  X509DataInfoList: {
    X509DataInfo: {
      CertRef: 'C.AUT' | 'C.QES' | 'C.SIG' | 'C.ENC'
      X509Data?: {
        X509IssuerSerial: { X509IssuerName, X509SerialNumber }
        X509SubjectName: string
        X509Certificate: base64string
      }
    }[]
  }
}

// CheckCertificateExpirationResponseMessage
{
  Status: { Result: 'OK' | 'Warning' }
  CertificateExpiration: {
    CtID: string
    CardHandle: string
    ICCSN: string
    subject_commonName: string
    serialNumber: string
    validity: Date
  }[]
}

---

5. TI Connector Interaction

How CertificateService Interacts with TI Connector:

1. SOAP Client Creation
   - Uses soap library to create async SOAP client
   - Loads WSDL from: CertificateService_v6_0_1.wsdl
   - Endpoint resolved from connector service directory

2. SSL/TLS Configuration
   - Calls addSSLOptionsToSoapClient() for client cert authentication
   - Uses connector's certificate and private key from ConfigurationService

3. Connector Operations
   - Calls VerifyCertificateAsync() on connector
   - Calls ReadCardCertificateAsync() on connector
   - Calls CheckCertificateExpirationAsync() on connector

4. Context Passing
   - Every operation includes Context: ConnectorContext with:
     - MandantId - Mandant/Tenant ID
     - ClientSystemId - Client system identifier
     - WorkplaceId - Workplace identifier
     - UserId - User identifier

5. Service Endpoint Management
   - Supported version: 6.0.1
   - Dynamic endpoint resolution from connector's service directory
   - URL: http://ti-konnektor/certificateservice

Logging Integration
- Uses kbvTiConnectLogger for debug/error logging
- Logs both input parameters and output responses
- Uses extraLogParser utility for structured logging

---

6. OCSP & Revocation Checking Details

The revocation checking is implemented in VauValidation.verifyCertificateRevocationStatus():

OCSP Verification Signature:
await JWKSignature.verify({
  payload: ocspBasicResp.tbsResponseData.tbsView,           // TBS (to be signed) data
  signatureValue: ocspBasicResp.signature.valueBlock.valueHexView,
  rawSignerCertificate: rawSignerCertificate                // Base64-encoded cert
})

Revocation Status Check:
// Extract certificate serial number and check OCSP response
const certificateSerialNumber = Certificate.fromBER(encCertificateBuffer).serialNumber.toBigInt()

ocspBasicResp.tbsResponseData.responses.forEach((resp) => {
  if (resp.certID.serialNumber.toBigInt() === certificateSerialNumber) {
    const certStatus = resp.certStatus.idBlock.tagNumber as number
    if (certStatus !== 0) {  // 0 = good, non-zero = revoked/suspended
      throw new Error(Certificate revoked, status: ${certStatus})
    }
  }
})

Error Scenarios:
- EMPTY_RESPONSE_BYTES_ERROR - OCSP response has no ResponseBytes
- Missing signer certificate in OCSP response - No cert to verify signature
- OCSP signer certificate is not valid - CertificateService verification failed
- Invalid OCSP Response signature - JWKSignature verification failed
- VAU certificate is not valid, the certificate status is: {status} - Certificate revoked

---

Key Architecture Notes

1. Separation o
…(truncated, 816 more chars)