@credo-ts/core/build/modules/vc/jwt-vc/W3cV2JwtCredentialService.mjs.map

<p align="center"> <br /> <img alt="Credo Logo" src="https://github.com/openwallet-foundation/credo-ts/blob/c7886cb8377ceb8ee4efe8d264211e561a75072d/images/credo-logo.png" height="250px" /> </p> <h1 align="center"><b>Credo - Core</b></h1

{"version":3,"file":"W3cV2JwtCredentialService.mjs","names":[],"sources":["../../../../src/modules/vc/jwt-vc/W3cV2JwtCredentialService.ts"],"sourcesContent":["import type { AgentContext } from '../../../agent/context'\nimport { JwsService, JwtPayload } from '../../../crypto'\nimport type { VerifyJwsResult } from '../../../crypto/JwsService'\nimport { CredoError } from '../../../error'\nimport { injectable } from '../../../plugins'\nimport { asArray, JsonTransformer, MessageValidator, nowInSeconds } from '../../../utils'\nimport { getPublicJwkFromVerificationMethod } from '../../dids/domain/key-type/keyDidMapping'\nimport { extractKeyFromHolderBinding } from '../../sd-jwt-vc/utils'\nimport type { SingleValidationResult, W3cV2VerifyCredentialResult, W3cV2VerifyPresentationResult } from '../models'\nimport {\n  extractHolderFromPresentationCredentials,\n  getVerificationMethodForJwt,\n  validateAndResolveVerificationMethod,\n} from '../v2-jwt-utils'\nimport type {\n  W3cV2JwtSignCredentialOptions,\n  W3cV2JwtSignPresentationOptions,\n  W3cV2JwtVerifyCredentialOptions,\n  W3cV2JwtVerifyPresentationOptions,\n} from '../W3cV2CredentialServiceOptions'\nimport { W3cV2JwtVerifiableCredential } from './W3cV2JwtVerifiableCredential'\nimport { W3cV2JwtVerifiablePresentation } from './W3cV2JwtVerifiablePresentation'\n\n/**\n * Supports signing and verifying W3C Verifiable Credentials and Presentations\n * secured with JSON Web Tokens (JWT).\n *\n * @see https://www.w3.org/TR/vc-data-model/\n * @see https://www.w3.org/TR/vc-jose-cose/#with-jose\n */\n@injectable()\nexport class W3cV2JwtCredentialService {\n  private jwsService: JwsService\n\n  public constructor(jwsService: JwsService) {\n    this.jwsService = jwsService\n  }\n\n  /**\n   * Signs a credential\n   */\n  public async signCredential(\n    agentContext: AgentContext,\n    options: W3cV2JwtSignCredentialOptions\n  ): Promise<W3cV2JwtVerifiableCredential> {\n    // Validate the instance\n    MessageValidator.validateSync(options.credential)\n\n    // The JWT payload is simply the credential\n    const jwtPayload = new JwtPayload({\n      additionalClaims: JsonTransformer.toJSON(options.credential),\n    })\n\n    // Add iat and cnf to the payload\n    jwtPayload.iat = nowInSeconds()\n    jwtPayload.additionalClaims.cnf = options.holder\n      ? (await extractKeyFromHolderBinding(agentContext, options.holder)).cnf\n      : undefined\n\n    // Validate and resolve the verification method\n    const publicJwk = await validateAndResolveVerificationMethod(agentContext, options.verificationMethod, [\n      'assertionMethod',\n    ])\n\n    // Sign the JWT\n    const jwt = await this.jwsService.createJwsCompact(agentContext, {\n      payload: jwtPayload,\n      keyId: publicJwk.keyId,\n      protectedHeaderOptions: {\n        typ: 'vc+jwt',\n        alg: options.alg,\n        kid: options.verificationMethod,\n      },\n    })\n\n    return W3cV2JwtVerifiableCredential.fromCompact(jwt)\n  }\n\n  /**\n   * Verifies the signature(s) of a credential\n   *\n   * @param credential the credential to be verified\n   * @returns the verification result\n   */\n  public async verifyCredential(\n    agentContext: AgentContext,\n    options: W3cV2JwtVerifyCredentialOptions\n  ): Promise<W3cV2VerifyCredentialResult> {\n    const validationResults: W3cV2VerifyCredentialResult = {\n      isValid: false,\n      validations: {},\n    }\n\n    try {\n      let credential: W3cV2JwtVerifiableCredential\n      try {\n        // If instance is provided as input, we want to validate the credential.\n        // Otherwise, it is done by the fromCompact method below\n        if (options.credential instanceof W3cV2JwtVerifiableCredential) {\n          options.credential.validate()\n        }\n\n        credential =\n          options.credential instanceof W3cV2JwtVerifiableCredential\n            ? options.credential\n            : W3cV2JwtVerifiableCredential.fromCompact(options.credential)\n\n        // Verify the JWT payload (verifies whether it's not expired, etc...)\n        credential.jwt.payload.validate({\n          skewSeconds: agentContext.config.validitySkewSeconds,\n        })\n\n        validationResults.validations.dataModel = {\n          isValid: true,\n        }\n      } catch (error) {\n        validationResults.validations.dataModel = {\n          isValid: false,\n          error,\n        }\n\n        return validationResults\n      }\n\n      const issuerVerificationMethod = await getVerificationMethodForJwt(agentContext, credential, ['assertionMethod'])\n      const issuerPublicKey = getPublicJwkFromVerificationMethod(issuerVerificationMethod)\n\n      let signatureResult: VerifyJwsResult | undefined\n      try {\n        // Verify the JWS signature\n        signatureResult = await this.jwsService.verifyJws(agentContext, {\n          jws: credential.jwt.serializedJwt,\n          // We have pre-fetched the key based on the issuer/signer of the credential\n          jwsSigner: {\n            method: 'did',\n            jwk: issuerPublicKey,\n            didUrl: issuerVerificationMethod.id,\n          },\n        })\n\n        if (!signatureResult.isValid) {\n          validationResults.validations.signature = {\n            isValid: false,\n            error: new CredoError('Invalid JWS signature'),\n          }\n        } else {\n          validationResults.validations.signature = {\n            isValid: true,\n          }\n        }\n      } catch (error) {\n        validationResults.validations.signature = {\n          isValid: false,\n          error,\n        }\n      }\n\n      // Validate whether the credential is signed with the 'issuer' id\n      // NOTE: this uses the verificationMethod.controller. We may want to use the verificationMethod.id?\n      if (credential.resolvedCredential.issuerId !== issuerVerificationMethod.controller) {\n        validationResults.validations.issuerIsSigner = {\n          isValid: false,\n          error: new CredoError(\n            `Credential is signed using verification method ${issuerVerificationMethod.id}, while the issuer of the credential is '${credential.resolvedCredential.issuerId}'`\n          ),\n        }\n      } else {\n        validationResults.validations.issuerIsSigner = {\n          isValid: true,\n        }\n      }\n\n      // Validate whether the `issuer` of the credential is also the signer\n      const issuerIsSigner = signatureResult?.jwsSigners.some(\n        (jwsSigner) => jwsSigner.jwk.fingerprint === issuerPublicKey.fingerprint\n      )\n      if (!issuerIsSigner) {\n        validationResults.validations.issuerIsSigner = {\n          isValid: false,\n          error: new CredoError('Credential is not signed by the issuer of the credential'),\n        }\n      } else {\n        validationResults.validations.issuerIsSigner = {\n          isValid: true,\n        }\n      }\n\n      validationResults.isValid = Object.values(validationResults.validations).every((v) => v.isValid)\n\n      return validationResults\n    } catch (error) {\n      validationResults.error = error\n      return validationResults\n    }\n  }\n\n  /**\n   * Signs a presentation including the credentials it includes\n   *\n   * @param presentation the presentation to be signed\n   * @returns the signed presentation\n   */\n  public async signPresentation(\n    agentContext: AgentContext,\n    options: W3cV2JwtSignPresentationOptions\n  ): Promise<W3cV2JwtVerifiablePresentation> {\n    // Validate the instance\n    MessageValidator.validateSync(options.presentation)\n\n    // The JWT payload is simply the presentation\n    const jwtPayload = new JwtPayload({\n      additionalClaims: JsonTransformer.toJSON(options.presentation),\n    })\n\n    // Add the nonce and aud to the payload\n    jwtPayload.additionalClaims.nonce = options.challenge\n    jwtPayload.aud = options.domain\n\n    const holder = await extractHolderFromPresentationCredentials(agentContext, options.presentation)\n\n    // Sign JWT\n    const jwt = await this.jwsService.createJwsCompact(agentContext, {\n      payload: jwtPayload,\n      keyId: holder.publicJwk.keyId,\n      protectedHeaderOptions: {\n        typ: 'vp+jwt',\n        alg: holder.alg,\n        kid: holder?.cnf?.kid,\n      },\n    })\n\n    return W3cV2JwtVerifiablePresentation.fromCompact(jwt)\n  }\n\n  /**\n   * Verifies a presentation including the credentials it includes\n   *\n   * @param presentation the presentation to be verified\n   * @returns the verification result\n   */\n  public async verifyPresentation(\n    agentContext: AgentContext,\n    options: W3cV2JwtVerifyPresentationOptions\n  ): Promise<W3cV2VerifyPresentationResult> {\n    const validationResults: W3cV2VerifyPresentationResult = {\n      isValid: false,\n      validations: {},\n    }\n\n    try {\n      let presentation: W3cV2JwtVerifiablePresentation\n      try {\n        // If instance is provided as input, we want to validate the presentation\n        if (options.presentation instanceof W3cV2JwtVerifiablePresentation) {\n          options.presentation.validate()\n        }\n\n        presentation =\n          options.presentation instanceof W3cV2JwtVerifiablePresentation\n            ? options.presentation\n            : W3cV2JwtVerifiablePresentation.fromCompact(options.presentation)\n\n        // Verify the JWT payload (verifies whether it's not expired, etc...)\n        presentation.jwt.payload.validate({\n          skewSeconds: agentContext.config.validitySkewSeconds,\n        })\n\n        // Make sure challenge matches nonce\n        if (options.challenge !== presentation.jwt.payload.additionalClaims.nonce) {\n          throw new CredoError(`JWT payload 'nonce' does not match challenge '${options.challenge}'`)\n        }\n\n        const audArray = asArray(presentation.jwt.payload.aud)\n        if (options.domain && !audArray.includes(options.domain)) {\n          throw new CredoError(`JWT payload 'aud' does not include domain '${options.domain}'`)\n        }\n\n        validationResults.validations.dataModel = {\n          isValid: true,\n        }\n      } catch (error) {\n        validationResults.validations.dataModel = {\n          isValid: false,\n          error,\n        }\n\n        return validationResults\n      }\n\n      const proverVerificationMethod = await getVerificationMethodForJwt(agentContext, presentation, ['authentication'])\n      const proverPublicKey = getPublicJwkFromVerificationMethod(proverVerificationMethod)\n\n      let signatureResult: VerifyJwsResult | undefined\n      try {\n        // Verify the JWS signature\n        signatureResult = await this.jwsService.verifyJws(agentContext, {\n          jws: presentation.jwt.serializedJwt,\n          allowedJwsSignerMethods: ['did'],\n          jwsSigner: {\n            method: 'did',\n            didUrl: proverVerificationMethod.id,\n            jwk: proverPublicKey,\n          },\n          trustedCertificates: [],\n        })\n\n        if (!signatureResult.isValid) {\n          validationResults.validations.presentationSignature = {\n            isValid: false,\n            error: new CredoError('Invalid JWS signature on presentation'),\n          }\n        } else {\n          validationResults.validations.presentationSignature = {\n            isValid: true,\n          }\n        }\n      } catch (error) {\n        validationResults.validations.presentationSignature = {\n          isValid: false,\n          error,\n        }\n      }\n\n      // Validate whether the presentation is signed with the 'holder' id\n      // NOTE: this uses the verificationMethod.controller. We may want to use the verificationMethod.id?\n      if (\n        presentation.resolvedPresentation.holderId &&\n        proverVerificationMethod.controller !== presentation.resolvedPresentation.holderId\n      ) {\n        validationResults.validations.holderIsSigner = {\n          isValid: false,\n          error: new CredoError(\n            `Presentation is signed using verification method ${proverVerificationMethod.id}, while the holder of the presentation is '${presentation.resolvedPresentation.holderId}'`\n          ),\n        }\n      } else {\n        // If no holderId is present, this validation passes by default as there can't be\n        // a mismatch between the 'holder' property and the signer of the presentation.\n        validationResults.validations.holderIsSigner = {\n          isValid: true,\n        }\n      }\n\n      // To keep things simple, we only support JWT VCs in JWT VPs for now\n      const credentials = asArray(presentation.resolvedPresentation.verifiableCredential)\n\n      // Verify all credentials in parallel, and await the result\n      validationResults.validations.credentials = await Promise.all(\n        credentials.map(async (credential) => {\n          if (!(credential.envelopedCredential instanceof W3cV2JwtVerifiableCredential)) {\n            return {\n              isValid: false,\n              error: new CredoError(\n                'Credential is not of format JWT. Presentations in JWT format can only contain credentials in JWT format.'\n              ),\n              validations: {},\n            }\n          }\n\n          const credentialResult = await this.verifyCredential(agentContext, {\n            credential: credential.envelopedCredential,\n          })\n\n          let credentialSubjectAuthentication: SingleValidationResult\n\n          // Check whether any of the credentialSubjectIds for each credential is the same as the controller of the verificationMethod\n          // This authenticates the presentation creator controls one of the credentialSubject ids.\n          // NOTE: this doesn't take into account the case where the credentialSubject is no the holder. In the\n          // future we can add support for other flows, but for now this is the most common use case.\n          // TODO: should this be handled on a higher level? I don't really see it being handled in the jsonld lib\n          // or in the did-jwt-vc lib (it seems they don't even verify the credentials itself), but we probably need some\n          // more experience on the use cases before we loosen the restrictions (as it means we need to handle it on a higher layer).\n          const credentialSubjectIds = credential.resolvedCredential.credentialSubjectIds\n          const presentationAuthenticatesCredentialSubject = credentialSubjectIds.some(\n            (subjectId) => proverVerificationMethod.controller === subjectId\n          )\n\n          if (credentialSubjectIds.length > 0 && !presentationAuthenticatesCredentialSubject) {\n            credentialSubjectAuthentication = {\n              isValid: false,\n              error: new CredoError(\n                'Credential has one or more credentialSubject ids, but presentation does not authenticate credential subject'\n              ),\n            }\n          } else {\n            credentialSubjectAuthentication = {\n              isValid: true,\n            }\n          }\n\n          return {\n            ...credentialResult,\n            isValid: credentialResult.isValid && credentialSubjectAuthentication.isValid,\n            validations: {\n              ...credentialResult.validations,\n              credentialSubjectAuthentication,\n            },\n          }\n        })\n      )\n\n      // Deeply nested check whether all validations have passed\n      validationResults.isValid = Object.values(validationResults.validations).every((v) =>\n        Array.isArray(v) ? 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