{
  "id": "certificate-usage/floating-sauteeing-noodle-subagent-a5d4863",
  "slug": "floating-sauteeing-noodle-subagent-a5d4863",
  "title": "Session: floating-sauteeing-noodle-subagent-a5d4863 — 2026-02-04",
  "type": "source",
  "project": "certificate-usage",
  "date": "2026-02-04",
  "started": "2026-02-04T15:56:03.454000+00:00",
  "ended": "2026-02-04T15:56:34.054000+00:00",
  "model": "claude-haiku-4-5-20251001",
  "cwd": "/Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage",
  "git_branch": "FHIR-1996_track-ecc-rsa-certificate-usage",
  "permission_mode": "",
  "user_messages": 1,
  "tool_calls": 14,
  "tools_used": [
    "Glob",
    "Grep",
    "Read",
    "Bash"
  ],
  "is_subagent": true,
  "wikilinks_out": [],
  "body_text": "Project: certificate-usage · Branch: FHIR-1996_track-ecc-rsa-certificate-usage · Mode:  · Model: claude-haiku-4-5-20251001\n\nStats: 1 user messages, 14 tool calls, tools used: Glob, Grep, Read, Bash.\n\nConversation\n\nTurn 1 — User\n\nSearch for algorithm mapping code related to certificates, specifically looking for logic that maps 'none', 'RSA', or 'ECC' algorithms and handles curveName. This is likely in certificate parsing or tracking code related to FHIR-1996.\n\nTurn 1 — Assistant\n\nI'll search for algorithm mapping code related to certificates, specifically looking for logic handling 'none', 'RSA', 'ECC' algorithms and curveName.\n\nTools used:\n\n- Glob: /.ts\n\nTools used:\n\n- Grep: (RSA|ECC|curveName|algorithm)\n\nTools used:\n\n- Grep: none.RSA.ECC\n\nTool results:\n\n  → result (ok): /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/config/builder/afterSign.ts\n/Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/config/builder/build.ts\n/Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/config/builder/signWindows.ts\n/Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/config/builder/updateProductName.ts\n/Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/config/codegen/co\n…(truncated, 11629 more chars)\n\nTool results:\n\n  → result (ok): Found 52 files\nsrc/modules/ehr-exports/main/ehr-exports-decryptor.ts\nsrc/modules/kbv-ti-connect/services/types.ts\nsrc/modules/kbv-ti-connect/services/ti-connect-settings.ts\nsrc/modules/kbv-ti-connect/services/qes-signature/__tests__/qes-signature.test.ts\nsrc/modules/kbv-ti-connect/services/qes-signature/index.ts\nsrc/modules/kbv-ti-connect/services/mock/mockStore.ts\nsrc/modules/kbv-ti-connect/services/configuration-service/__tests__/index.test.ts\nsrc/modules/kbv-ti-connect/services/configuration-\n…(truncated, 3081 more chars)\n\nTool results:\n\n  → result (ok): No files found\n\nLet me search more specifically for certificate algorithm mapping code:\n\nTools used:\n\n- Grep: RSA.ECC|algorithm.mapping|curveName\n\nTool results:\n\n  → result (ok): src/modules/kbv-ti-connect/services/qes-signature/index.ts:115:          Crypt: 'RSA_ECC',\nsrc/modules/kbv-ti-connect/services/qes-signature/__tests__/qes-signature.test.ts:382:        Crypt: 'RSA_ECC',\nsrc/modules/kbv-ti-connect/services/types.ts:43:export type CryptTypeSig = CryptType | 'RSA_ECC'\nsrc/modules/kbv-ti-connect/services/configuration-service/index.ts:19:  readonly #authSignAlgorithm: CryptType // RSA-ECC switch\nsrc/modules/kbv-ti-connect/services/configuration-service/index.ts:22: \n…(truncated, 4658 more chars)\n\nTools used:\n\n- Grep: FHIR-1996|certificate.algorithm|TiCertificate\n\nTool results:\n\n  → result (ok): Found 1 file\nsrc/modules/kbv-ti-connect/renderer/components/preferences/sections/TIConnect.tsx\n\nGreat! I found the key files. Let me examine the algorithm mapping code more closely:\n\nTools used:\n\n- Read: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/utils/jwaMapper.ts\n\nTool results:\n\n  → result (ok): 1→/\n     2→  Maps JWA (JSON Web Algorithm) strings to certificate tracking format\n     3→  Used to convert JWSUtils output to Datadog tracking events\n     4→ /\n     5→export interface CertificateInfo {\n     6→  certificateType: 'ECC' | 'RSA'\n     7→  curveName?: string\n     8→}\n     9→\n    10→export class JWAMapper {\n    11→  /\n    12→    Converts JWA algorithm string to certificate type and curve\n    13→    @param jwa - JWA string from JWSUtils (e.g., \"RS256\", \"ES256\", \"BP256R1\")\n    1\n…(truncated, 1851 more chars)\n\nTools used:\n\n- Read: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/kbv-ti-connect/main/ti-connect.ts\n\nTool results:\n\n  → result (ok): 1→import { ipcManager } from '@core/ipc-manager'\n     2→import { sendPreferences } from '@core/app/main/helpers/preferences-helper'\n     3→import { TrackingEvent } from '@core/monitoring'\n     4→\n     5→import { CertificateAnalyzer } from '@module/gematik-crypto'\n     6→import { TiEnvRepository } from '@module/gematik-ti-environment/services/tiEnvRepository'\n     7→import { kbvTiConnectLogger } from '@module/kbv-ti-connect/services/logger'\n     8→import tiConnect from '@module/kbv-ti-connect/ser\n…(truncated, 9614 more chars)\n\nTools used:\n\n- Read: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/utils/__tests__/jwaMapper.test.ts\n\nTool results:\n\n  → result (ok): 1→import { describe, expect, it } from 'vitest'\n     2→\n     3→import { JWAMapper } from '../jwaMapper'\n     4→\n     5→describe('JWAMapper', () => {\n     6→  describe('.mapJWAToCertificateInfo', () => {\n     7→    it('identifies RSA algorithms (RS family)', () => {\n     8→      expect(JWAMapper.mapJWAToCertificateInfo('RS256')).toEqual({\n     9→        certificateType: 'RSA',\n    10→      })\n    11→      expect(JWAMapper.mapJWAToCertificateInfo('RS384')).toEqual({\n    12→        certificateType:\n…(truncated, 2204 more chars)\n\nNow let me check the CertificateAnalyzer that's being called:\n\nTools used:\n\n- Grep: class CertificateAnalyzer|analyzeCertificate\n\nTools used:\n\n- Bash: find /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage -name \"[Cc]ertificate[Aa]nalyzer\" -o -name \"[Aa]nalyze\" | grep -i certificate | head -20\n\nTool results:\n\n  → result (ok): Found 3 files\nsrc/modules/kbv-ti-connect/main/__tests__/ti-connect.test.ts\nsrc/modules/kbv-ti-connect/main/ti-connect.ts\nsrc/modules/gematik-crypto/services/crypto-adapter/adapter.ts\n\nTool results:\n\n  → result (ok): /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/tools/codeowners/analyze.ts\n/Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/.claude/agents/modules/module-wiring-analyzer.md\n\nTools used:\n\n- Grep: CertificateAnalyzer\n\nTool results:\n\n  → result (ok): src/modules/kbv-ti-connect/main/ti-connect.ts:5:import { CertificateAnalyzer } from '@module/gematik-crypto'\nsrc/modules/kbv-ti-connect/main/ti-connect.ts:106:    const certificateInfo = await CertificateAnalyzer.analyzeCertificate(cert)\nsrc/modules/kbv-ti-connect/main/__tests__/ti-connect.test.ts:7:import { CertificateAnalyzer } from '@module/gematik-crypto'\nsrc/modules/kbv-ti-connect/main/__tests__/ti-connect.test.ts:44:  CertificateAnalyzer: {\nsrc/modules/kbv-ti-connect/main/__tests__/ti-conn\n…(truncated, 253 more chars)\n\nTools used:\n\n- Read: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/crypto-adapter/adapter.ts (150–250)\n\nTool results:\n\n  → result (ok): 150→      const response = await CustomHttpsFetch.call(endpoint, key, cert)\n   151→      return { status: response.status, body: await response.text() }\n   152→    }\n   153→  }\n   154→}\n   155→\n   156→export class CertificateAnalyzer {\n   157→  /\n   158→    Analyzes a certificate to extract type (ECC/RSA) and curve information\n   159→    Used for tracking certificate usage in Datadog\n   160→   \n   161→    This combines JWA derivation (from JWSUtils) and mapping to certificate info.\n   162→\n…(truncated, 870 more chars)\n\nNow let me check the JWSUtils to understand the full algorithm derivation pipeline:\n\nTools used:\n\n- Read: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/node/jose/JWSUtils.ts\n\nTool results:\n\n  → result (ok): 1→import { Certificate } from 'pkijs'\n     2→import  as Asn1 from 'asn1js'\n     3→\n     4→enum JWAlgorithms {\n     5→  HMAC = 'HS', // There is no MAC expected, so keeping here for the compatibility\n     6→  'RSASSA-PKCS1-v1_5' = 'RS',\n     7→  ECDSA = 'ES',\n     8→  'RSASSA-PSS' = 'PS',\n     9→}\n    10→\n    11→type JWSAlgorithms = 'HMAC' | 'RSASSA-PKCS1-v1_5' | 'ECDSA' | 'RSASSA-PSS'\n    12→export class JWSUtils {\n    13→  static concatenateECDSASignature(signature: string, outputLength: numbe\n…(truncated, 5381 more chars)\n\nPerfect! Now let me check the test file to see more complete coverage:\n\nTools used:\n\n- Read: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/kbv-ti-connect/main/__tests__/ti-connect.test.ts (500–650)\n\nTool results:\n\n  → result (ok): 500→\n   501→      expect(kbvTiConnectLogger.error).toHaveBeenCalledWith('TiConnectModule', {\n   502→        extra: 'mocked-log-string',\n   503→      })\n   504→      expect(mockExtraLogParser).toHaveBeenCalledWith({\n   505→        traceId: incompleteData.traceId,\n   506→        functionName: 'onTiConnectDecryptKeyStoreListener',\n   507→        operation: 'update',\n   508→        direction: 'input',\n   509→        params: ['data.tiKeyStorePath', 'data.tiKeyStorePassword'],\n   510→      })\n   511→ \n…(truncated, 6748 more chars)\n\nExcellent! Now I have a complete picture. Let me create a comprehensive summary of the algorithm mapping code:\n\nSummary: Algorithm Mapping Code for Certificate Tracking (FHIR-1996)\n\nI've found the complete algorithm mapping implementation for tracking ECC/RSA certificate usage in your FHIR-1996 branch. Here are the key components:\n\n1. Main Algorithm Mapper: JWAMapper\nFile: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/utils/jwaMapper.ts\n\nThis class maps JWA (JSON Web Algorithm) strings to certificate types with the following logic:\n\nAlgorithm Mapping Logic:\n- RSA Algorithms: Recognizes RS (RS256, RS384, RS512) and PS* (PS256, PS384, PS512) prefixes → Returns { certificateType: 'RSA' }\n- ECC - Brainpool Curve: BP256R1 → Returns { certificateType: 'ECC', curveName: 'brainpoolP256r1' } (German TI standard)\n- ECC - NIST Curves: \n  - ES256 → { certificateType: 'ECC', curveName: 'P-256' }\n  - ES384 → { certificateType: 'ECC', curveName: 'P-384' }\n  - ES512 → { certificateType: 'ECC', curveName: 'P-521' } (note: P-521, not P-512)\n- 'none' Algorithm: Returns { certificateType: 'RSA', curveName: 'unknown' } (handled as fallback for unsigned certificates)\n\n2. Certificate Analysis Pipeline\nFile: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/crypto-adapter/adapter.ts\n\nThe CertificateAnalyzer class orchestrates the analysis:\n1. Calls JWSUtils.deriveJWAFromCertificate(certificate) to extract the JWA string\n2. Passes result to JWAMapper.mapJWAToCertificateInfo(jwa) to convert to tracking format\n\n3. JWA Derivation: JWSUtils\nFile: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/node/jose/JWSUtils.ts\n\nThe deriveJWAFromCertificate() method:\n- Parses base64-encoded certificate using pkijs (pure JavaScript)\n- Extracts public key algorithm details (RSA or EC)\n- For RSA: Combines algorithm identifier (RS or PS) with hash size (256, 384, 512)\n- For ECC: Combines algorithm identifier (ES) with hash size OR detects brainpoolP256r1 via OID 1.3.36.3.3.2.8.1.1.7\n- Returns 'none' if parsing fails (fallback for unsigned certificates)\n\n4. Integration Point: TiConnect Module\nFile: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/kbv-ti-connect/main/ti-connect.ts\n\nThe trackCertificateType() function (lines 104-137):\n- Called during keystore decryption\n- Uses CertificateAnalyzer.analyzeCertificate() to extract certificate info\n- Sends tracking events with:\n  - certificateType: 'ECC' or 'RSA'\n  - curveName: specific curve (e.g., 'brainpoolP256r1', 'P-256') or undefined for RSA\n  - tiEnvironment: TI environment value (RU, PU, etc.)\n- Gracefully handles errors (observability-only, doesn't break main flow)\n\n5. Test Coverage\nFile: /Users/USER/workspace/doctolib/FHIR-1996_track-ecc-rsa-certificate-usage/src/modules/gematik-crypto/services/utils/__tests__/jwaMapper.test.ts\n\nComprehensive test suite covering:\n- RS256, RS384, RS512 (RSA algorithms)\n- PS256 (RSA-PSS)\n- BP256R1 (brainpoolP256r1 ECC)\n- ES256, ES384, ES512 (NIST ECC curves)\n- 'none' algorithm (unknown/unsigned)\n- Error handling for unknown algorithms\n\n---\n\nKey Design Decision: The 'none' algorithm is mapped to RSA with curveName 'unknown' to maintain backward compatibility while still tracking that a certificate exists but couldn't be properly analyzed.",
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  "source_url": "sessions/certificate-usage/2026-02-04T15-56-certificate-usage-floating-sauteeing-noodle-subagent-a5d4863.html"
}