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TypeScript","homepage":"https://github.com/blobaa/claim-ts#readme","repository":{"type":"git","url":"git+https://github.com/blobaa/claim-ts.git"},"author":{"name":"atz3n"},"bugs":{"url":"https://github.com/blobaa/claim-ts/issues"},"license":"AGPL-3.0-or-later","readme":"# Claim TypeScript\n\nAn implementation of the [Claim](https://docu.blobaa.dev/claim) module written in [TypeScript](https://www.typescriptlang.org).\n\n\n
Table of Contents\n

\n\n- [Claim TypeScript](#claim-typescript)\n - [Installation](#installation)\n - [Npmjs Registry](#npmjs-registry)\n - [Github Registry](#github-registry)\n - [Development](#development)\n - [General](#general)\n - [APIs](#apis)\n - [Claim](#claim)\n - [Example](#example)\n - [Claim Registration](#claim-registration)\n - [Verifiable Claim Creation](#verifiable-claim-creation)\n - [Claim Verification](#claim-verification)\n - [Module Instantiation](#module-instantiation)\n - [Licensing](#licensing)\n - [Dual-License](#dual-license)\n\n

\n
\n\n\n## Installation\n\nThis library is published on GitHub's and npmjs's npm registry.\n\n\n### Npmjs Registry\n\n````\nnpm install @blobaa/claim-ts\n````\n\nSee [npmjs package](https://www.npmjs.com/package/@blobaa/claim-ts).\n\n\n### Github Registry\n\nFor using GitHub's registry, create a *.npmrc* file in the same directory as your *package.json* and add the following line \n\n````\n@blobaa:registry=https://npm.pkg.github.com/blobaa\n```` \n\nThis tells npm to use the GitHub registry for @blobaa scoped packages. More information about multiple registry usage can be found in [this medium post](https://medium.com/@crysfel/using-different-registries-in-yarn-and-npm-766541d6f851).\n\nYou can now install the package via\n\n````\nnpm install @blobaa/claim-ts\n````\n\nSee [GitHub package](https://github.com/blobaa/claim-ts/packages/93052).\n\nCAUTION: You need to [authenticate yourself](https://github.community/t5/GitHub-API-Development-and/Download-from-Github-Package-Registry-without-authentication/td-p/35255) to use the GitHub registry, even if it's a public available package.\n\n\n## Development\n\nYou need to have [Node.js](https://nodejs.org/en/) installed.\n\nTo **initialize** the project just clone this repository and run\n```\nnpm install\n```\n\nFor **linting** run \n```\nnpm run lint\n```\n\nYou can try to **autofix lint errors** with\n```\nnpm run fix-lint\n```\n\nFor **unit testing** run the following associated commands\n\nbrowser:\n```\nnpm run test-browser\n```\n\nnode: \n```\nnpm run test-node\n```\n\nboth: \n```\nnpm test\n```\n\n\n## General\n\nThis library implements the [Claim](https://docu.blobaa.dev/claim) module and must therefore be used in conjunction with the [Attestation Protocol](https://docu.blobaa.dev/attestation-protocol) [implementation](https://github.com/blobaa/attestation-protocol-ts) to enable verifiable claim based authentication.\n\n\n## APIs\n\nThe library contains the following module:\n\n### Claim\n\nThe Claim module provides APIs for claim data preparation, claim creation and claim verification:\n\n````typescript\n- prepareUserData: (params: PrepareUserDataParams) => UserData[]\n- setUserData: (params: SetUserDataParams) => void\n- createHashes: () => Hashes\n- createClaim: (params: CreateClaimParams) => ClaimObject\n- verifyClaim: (params: VerifyClaimParams) => boolean\n````\n\nThe **prepareUserData** function extends an unprepared user data object with a unique alphanumeric nonce.\n\nThe **setUserData** function consumes an array of prepared user data objects and stores it internally.\n\nThe **createHashes** function returns an object that contains the root hash and the leaf hashes of the user data object.\n\nThe **createClaim** function creates a claim object based on preselected user data.\n\nThe **verifyClaim** function verifies a claim object.\n\n\n## Example\n\nThe following example shows sample code for the three Claim workflows (registering, creating, and verifying a verifiable claim). It uses, as described above, the Attestation Protocol implementation, additionally to this Claim library.\n\nIt shows a fictive scenario of a registration office where the user Oliver receives and uses the verifiable claim that represents a subset of his id card information.\n\n\n### Claim Registration\n\n````typescript\nimport { claim, SetUserDataParams, PrepareUserDataParams } from \"@blobaa/claim-ts\";\nimport { attestation, CreateLeafAttestationParams } from \"@blobaa/attestation-protocol-ts\";\n\n\n/* unprepared claim user data */\nconst data = [\n { name: \"address:city\", value: \"Cologne\" },\n { name: \"address:country\", value: \"Germany\" },\n { name: \"address:number\", value: \"3\" },\n { name: \"address:street\", value: \"Kölner Weg\" },\n { name: \"address:zip\", value: \"11221\" },\n { name: \"person:firstName\", value: \"Oliver\" },\n { name: \"person:surName\", value: \"Schmidt\" },\n { name: \"person:birthDay\", value: \"11.11.2000\" }\n];\n\n\nconst claimRegistrationExample = async (): Promise => {\n\n /*\n * Step 1: Add a nonce to each user data object\n * (optional. Can be omitted if the user data are already in prepared form)\n */\n\n const params1: PrepareUserDataParams = {\n unpreparedUserData: data\n };\n\n const userData = claim.prepareUserData(params1);\n\n /* the user data are now extended with unique 64 character long alphanumeric nonces */\n console.log(\"prepared user data:\\n\", userData, \"\\n\");\n\n\n /*\n * Step 2: Get the root hash\n */\n\n const params2: SetUserDataParams = {\n userData\n };\n\n claim.setUserData(params2); // stores the user data array internally\n const claimHashes = claim.createHashes();\n\n /* the root hash is now accessible via the rootHash key */\n console.log(\"root hash:\", claimHashes.rootHash, \"\\n\");\n\n\n /*\n * Step 3: Attach the root hash as attestation payload\n */\n\n const rootHash = {\n rootHash: claimHashes.rootHash\n };\n\n const params3: CreateLeafAttestationParams = {\n leafAccount: \"ARDOR-5HVX-MN8D-QNBH-4F6FE\", // account to be attested (Oliver`s account)\n attestationContext: \"claimAuthentication\",\n payload: JSON.stringify(rootHash), // the root hash\n\n passphrase: \"\", // passphrase of attestor account\n myAttestorAccount: \"ARDOR-47NS-P7AU-HZNN-84PW6\" // [optional] account name of attestor accounts attestor.\n // Required if attestor account is an intermediate entity\n };\n\n try {\n\n /* create and emit request */\n const response = await attestation.createLeafAttestation(\"https://testardor.jelurida.com\", params3);\n\n /* the claim is now registered with the specified user data array to the attested account (Oliver`s account) */\n console.log(\"transaction id:\", response.transactionId);\n\n\n /*\n * Step 4: Forward the prepared user data array to the attested account holder (to Oliver in this case)\n *\n * \n */\n\n } catch (e) { /* error handling (see attestation-protocol-ts readme) */ }\n\n};\n\nclaimRegistrationExample();\n````\n\n\n### Verifiable Claim Creation\n\n````typescript\nimport { claim, CreateClaimParams, SetUserDataParams } from \"@blobaa/claim-ts\";\nimport { data, SignDataParams } from \"@blobaa/attestation-protocol-ts\";\n\n\n/* the prepared claim user data forwarded at the claim registration process (see Claim Registration) */\nconst userData = [\n { name: \"address:city\", value: \"Cologne\", nonce: \"fNQKzWwac2OTPKLOsdF98bMq4xcLTozIZIOk9EF0vzL2xlIBB6EgUw7vztkB5oJ6\" },\n { name: \"address:country\", value: \"Germany\", nonce: \"IHCiJeCNitRqikxSxWUj3s0mOr8du3PCnkqaH7ooRkImZk7mKYKJc1xpzgx3Utc1\" },\n { name: \"address:number\", value: \"3\", nonce: \"dIMctTViKw4j1VjFnD9DYOky2CBxDlIcfOVpVqHxbthMXeyXyTnuJMO8J7rBQhir\" },\n { name: \"address:street\", value: \"Kölner Weg\", nonce: \"JlAIZKGGm9cBVd2ZZlO7eOnkVGROvV1B6gJCkEtjPGj2CLqcsfc9KJgbuobrCT0k\" },\n { name: \"address:zip\", value: \"11221\", nonce: \"Ztqy9Eep6sw6ZMWRU9AoucyFa3B46vJ0PswIOBStsAtaJEMeFbdGkPlqMXBgM09T\" },\n { name: \"person:firstName\", value: \"Oliver\", nonce: \"Lz6yDcwEXgSWHsUt8YK1QCKBgb2eptTDif3xOks6KQx9BvKrZhXPqGqdrlIrZAGL\" },\n { name: \"person:surName\", value: \"Schmidt\", nonce: \"1lRu8pwklj33nTsFo0tRYLb3fQ732zR12eiZz2xFy4WiiavBzqrChRQIw1Mu2qbB\" },\n { name: \"person:birthDay\", value: \"11.11.2000\", nonce: \"1UB3TUC1yyeFnSkxJVhiqQBEzmeWt4lOQNUQ5kg0VIFbxYQPBgBgbE46ovvagtba\" }\n];\n\n\nconst verifiableClaimCreationExample = (): void => {\n\n /*\n * Step 1: Select the user data to claim\n */\n\n const params1: CreateClaimParams = {\n userDataNames: [\n \"address:country\",\n \"person:birthDay\"\n ]\n };\n\n\n /*\n * Step 2: Create the claim\n */\n\n const params2: SetUserDataParams = {\n userData: userData\n };\n\n claim.setUserData(params2);\n const claimObject = claim.createClaim(params1);\n\n /* the claim object bundles the selected user data along with claim verification information */\n console.log(\"claim object:\\n\", claimObject, \"\\n\\n\");\n\n\n /*\n * Step 3: Sign the claim\n */\n\n const params3: SignDataParams = {\n attestationContext: \"claimAuthentication\",\n attestationPath: [ // trust chain up to the root account\n \"ARDOR-3ZKF-US3F-KGL7-GUEZE\",\n \"ARDOR-47NS-P7AU-HZNN-84PW6\"\n ],\n payload: JSON.stringify(claimObject), // stringified claim object\n passphrase: \"chicken clerk liquid evil turtle duty like jeans beauty hundred swim sample\" // passphrase of claim creator account (Oliver`s account)\n };\n\n const signedClaim = data.signData(params3, true);\n\n /* the signed claim object is now ready to be shared and verified */\n console.log(\"signed claim object:\\n\", signedClaim);\n};\n\nverifiableClaimCreationExample();\n````\n\n\n### Claim Verification\n\n````typescript\nimport { claim, VerifyClaimParams, ClaimObject } from \"@blobaa/claim-ts\";\nimport { data, VerifySignedDataParams, SignedDataCheckParams, EntityCheckParams, Error, ErrorCode, SignedData } from \"@blobaa/attestation-protocol-ts\";\n\n\n/* the signed claim created at the claim creation process (see Verifiable Claim Creation) */\nconst signedClaim: SignedData = {\n attestationContext: \"claimAuthentication\",\n attestationPath: [ \"ARDOR-3ZKF-US3F-KGL7-GUEZE\", \"ARDOR-47NS-P7AU-HZNN-84PW6\" ],\n creatorAccount: \"ARDOR-5HVX-MN8D-QNBH-4F6FE\",\n payload: \"{\\\"userData\\\":[{\\\"name\\\":\\\"address:country\\\",\\\"value\\\":\\\"Germany\\\",\\\"nonce\\\":\\\"IHCiJeCNitRqikxSxWUj3s0mOr8du3PCnkqaH7ooRkImZk7mKYKJc1xpzgx3Utc1\\\"},{\\\"name\\\":\\\"person:birthDay\\\",\\\"value\\\":\\\"11.11.2000\\\",\\\"nonce\\\":\\\"1UB3TUC1yyeFnSkxJVhiqQBEzmeWt4lOQNUQ5kg0VIFbxYQPBgBgbE46ovvagtba\\\"}],\\\"hashes\\\":{\\\"leafHashes\\\":[\\\"739e1eec28e2c8c551e730a9480f63a7b93bb9aa48bd54463fbf44aa2e54ce8d\\\",\\\"5837ac6ce233f9a3d75bd8e41d3febe5ec59f9590f665b625c9cc0a408711361\\\",\\\"1be4b90fa974e78300d0c6d36eb3cfb7ceadcd38790fd60938ef210deb732dd6\\\",\\\"33a0ad65e9d7183128aa1b24be9d7fc5f774fa940345844d5f6f3a3d54214b7e\\\",\\\"3e4b13d21def5c17f8896ae2903b90c9e3df0c33e784629d889da0e276488c78\\\",\\\"e9be2351d0969531cae85b6d697fc561fc3701014543b4e0412c75976aaba857\\\"],\\\"rootHash\\\":\\\"077e142468b011a454b62991a54e17b4b2408bcc5a73f7de87f188335280b17b\\\"}}\",\n signature: \"4f31stdpt2hm70iu8oer1tsq4lekck2rmt565f3eult4ocob3a2juomqs5s2ah0439t762igiof08rcr84rumr6lkf8vt9cfhuqutimf840gl1memb6mndh70i3gg4eacqcl13nvcb8206urs8evh03cm6nj02m2\"\n};\n\n\nconst claimVerificationExample = async (): Promise => {\n\n /*\n * Step 1: Create a claim check callback\n */\n\n let rootHash = \"\";\n let claimCreator = \"\";\n\n const claimCheckCallback = (params1: SignedDataCheckParams): boolean => {\n let claimObject: ClaimObject\n \n /* parse the claim object */\n try {\n claimObject = JSON.parse(params1.signedData.payload);\n } catch (e) {\n return false;\n } \n\n /* get user data */\n console.log(\"claim user data:\\n\", claimObject.userData, \"\\n\");\n\n /* get the claim signature time */\n console.log(\"claim signature time:\", new Date(params1.signatureTime), \"\\n\\n\");\n\n\n /* verify the claim */\n const params2: VerifyClaimParams = {\n claimObject\n };\n\n const isClaimValid = claim.verifyClaim(params2);\n\n\n /* store information for claim entity checks */\n claimCreator = params1.signedData.creatorAccount;\n rootHash = claimObject.hashes.rootHash;\n\n\n return isClaimValid; // verification process stops in case of an invalid claim\n };\n\n\n /*\n * Step 2: Create a claim entity check callback\n */\n\n let isRootHashAttested = false;\n\n const claimEntityCheckCallback = (entity: EntityCheckParams): boolean => {\n\n /* show trust chain entities */\n console.log(\"account: \", entity.account);\n console.log(\"payload: \", entity.payload);\n console.log(\"entity : \", entity.entityType, \"\\n\");\n\n\n /* check if the root hash is attached to the claim creator account */\n if (!isRootHashAttested) {\n let parsedRootHash: string;\n\n try {\n parsedRootHash = JSON.parse(entity.payload).rootHash;\n } catch (e) {\n return false;\n }\n\n if (claimCreator === entity.account && rootHash === parsedRootHash) {\n isRootHashAttested = true;\n }\n }\n\n return isRootHashAttested; // verification process stops in case of an unattested root hash\n };\n\n\n /*\n * Step 3: Request claim verification\n */\n\n const params: VerifySignedDataParams = {\n trustedRootAccount: \"ARDOR-47NS-P7AU-HZNN-84PW6\", // the trust chain`s root account\n signedData: signedClaim,\n signedDataCheckCallback: claimCheckCallback,\n entityCheckCallback: claimEntityCheckCallback\n };\n\n try {\n\n /* create and emit request */\n const response = await data.verifySignedData(\"https://testardor.jelurida.com\", params, true);\n\n /* Congratulation!!!, you have successfully finished the verification process. The claim is valid and attested */\n console.log(\"\\n\", \"claim is ok :)\");\n console.log(\"verification information:\\n\", response);\n\n } catch (e) {\n\n /* if your program reaches these lines, an error occurred and the verification finished without success. */\n const error = e as Error;\n\n switch (error.code) {\n case ErrorCode.SIGNED_DATA_CALLBACK_ERROR:\n console.log(\"\\n\", \"claim is invalid :(\");\n break;\n case ErrorCode.ENTITY_CALLBACK_ERROR:\n console.log(\"\\n\", \"claim creator account is not attested or root hashes mismatch :(\");\n break;\n default:\n console.log(error);\n }\n }\n};\n\nclaimVerificationExample();\n````\n\n\n## Module Instantiation\n\nThe claim module is pre instantiated and importable via the lower case module name. If you need the class definition, import it via the upper case name. For example:\n\n````typescript\nimport { claim, Claim, PrepareUserDataParams} from '@blobaa/claim-ts'\n\n\nconst params: PrepareUserDataParams = {\n userData: [\n { name: 'data1', value: '42'},\n { name: 'data2', value: '42'}\n ]\n};\n\n\n/* use the default instance */\nconst userData = claim.prepareUserData(params);\nconsole.log(userData);\n\n/* use your own instance */\nconst myClaim = new Claim();\nconst userData2 = myClaim.prepareUserData(params);\nconsole.log(userData2);\n````\n\n\n## Licensing\n\n### Dual-License\nclaim-ts source code (\"The Software\") is licensed under **both** GNU Affero General Public License v3.0 or later **and** a proprietary license that can be arranged with me. In practical sense, this means:\n\n- If you are developing Open Source Software (OSS) based on claim-ts, chances are you will be able to use claim-ts freely under AGPL. Please double check [here](https://www.gnu.org/licenses/agpl-3.0.en.html) for OSS license compatibility with AGPL.\n- Alternatively, if you are unable to release your application as Open Source Software, you may arrange alternative licensing with me. Just send your inquiry to hi.blobaa@gmail.com to discuss this option.\n\n____\nEnjoy :)\n","readmeFilename":"README.md"}