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Our Personal Data Server from scratch!
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4.5 kB · 158 lines
TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159export interface PublicKeyCredentialDescriptorJSON { type: "public-key"; id: string; transports?: AuthenticatorTransport[];}
export interface PublicKeyCredentialUserEntityJSON { id: string; name: string; displayName: string;}
export interface PublicKeyCredentialRpEntityJSON { name: string; id?: string;}
export interface PublicKeyCredentialParametersJSON { type: "public-key"; alg: number;}
export interface AuthenticatorSelectionCriteriaJSON { authenticatorAttachment?: AuthenticatorAttachment; residentKey?: ResidentKeyRequirement; requireResidentKey?: boolean; userVerification?: UserVerificationRequirement;}
export interface PublicKeyCredentialCreationOptionsJSON { rp: PublicKeyCredentialRpEntityJSON; user: PublicKeyCredentialUserEntityJSON; challenge: string; pubKeyCredParams: PublicKeyCredentialParametersJSON[]; timeout?: number; excludeCredentials?: PublicKeyCredentialDescriptorJSON[]; authenticatorSelection?: AuthenticatorSelectionCriteriaJSON; attestation?: AttestationConveyancePreference;}
export interface PublicKeyCredentialRequestOptionsJSON { challenge: string; timeout?: number; rpId?: string; allowCredentials?: PublicKeyCredentialDescriptorJSON[]; userVerification?: UserVerificationRequirement;}
export interface WebAuthnCreationOptionsResponse { publicKey: PublicKeyCredentialCreationOptionsJSON;}
export interface WebAuthnRequestOptionsResponse { publicKey: PublicKeyCredentialRequestOptionsJSON;}
export interface CredentialAssertionJSON { id: string; type: string; rawId: string; response: { clientDataJSON: string; authenticatorData: string; signature: string; userHandle: string | null; };}
export interface CredentialAttestationJSON { id: string; type: string; rawId: string; response: { clientDataJSON: string; attestationObject: string; };}
export function base64UrlToArrayBuffer(base64url: string): ArrayBuffer { const base64 = base64url.replace(/-/g, "+").replace(/_/g, "/"); const padded = base64 + "=".repeat((4 - (base64.length % 4)) % 4); const binary = atob(padded); return Uint8Array.from(binary, (char) => char.charCodeAt(0)).buffer;}
export function arrayBufferToBase64Url(buffer: ArrayBuffer): string { const bytes = new Uint8Array(buffer); const binary = Array.from(bytes, (byte) => String.fromCharCode(byte)).join( "", ); return btoa(binary).replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g, "");}
export function prepareCreationOptions( options: WebAuthnCreationOptionsResponse,): PublicKeyCredentialCreationOptions { const pk = options.publicKey; return { ...pk, challenge: base64UrlToArrayBuffer(pk.challenge), user: { ...pk.user, id: base64UrlToArrayBuffer(pk.user.id), }, excludeCredentials: (pk.excludeCredentials ?? []).map((cred) => ({ ...cred, id: base64UrlToArrayBuffer(cred.id), })), };}
export function prepareRequestOptions( options: WebAuthnRequestOptionsResponse,): PublicKeyCredentialRequestOptions { const pk = options.publicKey; return { ...pk, challenge: base64UrlToArrayBuffer(pk.challenge), allowCredentials: (pk.allowCredentials ?? []).map((cred) => ({ ...cred, id: base64UrlToArrayBuffer(cred.id), })), };}
export function serializeAttestationResponse( credential: PublicKeyCredential,): CredentialAttestationJSON { const response = credential.response as AuthenticatorAttestationResponse; return { id: credential.id, type: credential.type, rawId: arrayBufferToBase64Url(credential.rawId), response: { clientDataJSON: arrayBufferToBase64Url(response.clientDataJSON), attestationObject: arrayBufferToBase64Url(response.attestationObject), }, };}
export function serializeAssertionResponse( credential: PublicKeyCredential,): CredentialAssertionJSON { const response = credential.response as AuthenticatorAssertionResponse; return { id: credential.id, type: credential.type, rawId: arrayBufferToBase64Url(credential.rawId), response: { clientDataJSON: arrayBufferToBase64Url(response.clientDataJSON), authenticatorData: arrayBufferToBase64Url(response.authenticatorData), signature: arrayBufferToBase64Url(response.signature), userHandle: response.userHandle ? arrayBufferToBase64Url(response.userHandle) : null, }, };}