feat: implemented OIDC presentation submission API

cmd/wallet-js-sdk/src/oidc/presentation/openid4vp.js

@@ -10,6 +10,15 @@ import { decode } from "js-base64";
 import { CredentialManager, DIDManager } from "@";
 import * as jose from "jose";
 
+// TODO: replace mock function with an actual JWT signer once implemented
+async function signJWT({ header, payload }) {
+  return new Promise((resolve, reject) => {
+    setTimeout(() => {
+      resolve("mock.signed.jwt");
+    }, 300);
+  });
+}
+
 /**
  *  OpenID4VP module is the oidc client that provides APIs for OIDC4VP flows.
  *
@@ -120,6 +129,184 @@ export class OpenID4VP {
         }
       });
 
+    this.client_id = payload.client_id;
+    this.nonce = payload.nonce;
+    this.redirect_uri = payload.redirect_uri;
+
     return response.results;
   }
+
+  /**
+   * submitOIDCPresentation performs an OIDC presentation submission
+   * @param {string} kid - consumer's verification method's kid.
+   * @param {Object} presentationQuery - presentation query object retrieved from user's wallet.
+   * @param {string} issuer - the issuer's key id.
+   * @param {number} expiry - time in seconds representing the expiry of the presentation.
+   *
+   *
+   * @returns {Promise<Object>} - empty promise or error if operation fails.
+   */
+  async submitOIDCPresentation(kid, presentationQuery, issuer, expiry) {
+    if (!kid) {
+      throw new TypeError(
+        "Error submitting OpenID4VP presentation: kid cannot be empty"
+      );
+    } else if (!presentationQuery) {
+      throw new TypeError(
+        "Error submitting OpenID4VP presentation: presentationQuery cannot be empty"
+      );
+    } else if (!presentationQuery.presentation_submission) {
+      throw new TypeError(
+        "Error submitting OpenID4VP presentation: presentation_submission is missing"
+      );
+    } else if (!presentationQuery.type) {
+      throw new TypeError(
+        "Error submitting OpenID4VP presentation: type is missing"
+      );
+    } else if (!presentationQuery.verifiableCredential) {
+      throw new TypeError(
+        "Error submitting OpenID4VP presentation: verifiableCredential is missing"
+      );
+    } else if (!issuer) {
+      throw new TypeError(
+        "Error submitting OpenID4VP presentation: issuer is missing"
+      );
+    } else if (!expiry) {
+      throw new TypeError(
+        "Error submitting OpenID4VP presentation: expiry is missing"
+      );
+    }
+
+    const header = new Object();
+    Object.defineProperty(header, "alg", {
+      value: alg,
+    });
+    Object.defineProperty(header, "kid", {
+      value: kid,
+    });
+    Object.defineProperty(header, "typ", {
+      value: "JWT",
+    });
+
+    const idToken = await generateIdToken(
+      kid,
+      presentationQuery.presentation_submission,
+      header,
+      expiry
+    );
+
+    const vp = new Object();
+    Object.defineProperty(vp, "@context", {
+      value: presentationQuery["@context"],
+    });
+    Object.defineProperty(vp, "type", {
+      value: presentationQuery.type,
+    });
+    Object.defineProperty(vp, "verifiableCredential", {
+      // TODO: encode and sign with JWT
+      value: presentationQuery.verifiableCredential,
+    });
+
+    const vpToken = await generateVpToken(kid, header, vp, expiry);
+
+    const authRequest = new URLSearchParams();
+    authRequest.append("id_token", idToken);
+    authRequest.append("vp_token", vpToken);
+
+    return await axios.post(this.redirect_uri, authRequest).catch((e) => {
+      throw new Error("Error submitting OIDC presentation:", e);
+    });
+  }
+}
+
+/**
+ * generateIdToken generates an ID Token for the presentation submission request
+ * @param {string} kid - consumer's verification method's kid.
+ * @param {Object} presentationSubmission - presentation submission.
+ * @param {Object} header - header for the ID Token.
+ * @param {number} expiry - time in seconds representing the expiry of the token.
+ *
+ *
+ * @returns {Promise<string>} - a promise resolving with a string containing ID Token or an error.
+ */
+async function generateIdToken(kid, presentationSubmission, header, expiry) {
+  if (!kid) {
+    throw new TypeError("Error generating ID Token: kid cannot be empty");
+  } else if (!presentationSubmission) {
+    throw new TypeError(
+      "Error generating ID Token: presentationSubmission cannot be empty"
+    );
+  } else if (!header) {
+    throw new TypeError("Error generating ID Token: header cannot be empty");
+  } else if (!expiry) {
+    throw new TypeError("Error generating ID Token: expiry cannot be empty");
+  }
+
+  const vpToken = new Object();
+  Object.defineProperty(vpToken, "presentation_submission", {
+    value: presentationSubmission,
+  });
+
+  const payload = new Object();
+  Object.defineProperty(payload, "sub", {
+    value: kid.split("#")[0],
+  });
+  Object.defineProperty(payload, "nonce", {
+    value: this.nonce,
+  });
+  Object.defineProperty(payload, "_vp_token", {
+    value: vpToken,
+  });
+  Object.defineProperty(payload, "aud", {
+    value: this.client_id,
+  });
+  Object.defineProperty(payload, "iss", {
+    value: "https://self-issued.me/v2/openid-vc",
+  });
+  Object.defineProperty(payload, "exp", {
+    value: expiry,
+  });
+
+  return await signJWT({ header, payload });
+}
+
+/**
+ * generateVpToken generates a VP Token for the presentation submission request
+ * @param {string} kid - consumer's verification method's kid.
+ * @param {Object} vp - object containing details for the presentation.
+ * @param {Object} header - header for the VP Token.
+ * @param {number} expiry - time in seconds representing the expiry of the token.
+ *
+ *
+ * @returns {Promise<string>} - a promise resolving with a string containing ID Token or an error.
+ */
+async function generateVpToken(kid, vp, header, expiry) {
+  if (!kid) {
+    throw new TypeError("Error generating VP Token: kid cannot be empty");
+  } else if (!vp) {
+    throw new TypeError("Error generating VP Token: vp cannot be empty");
+  } else if (!header) {
+    throw new TypeError("Error generating VP Token: header cannot be empty");
+  } else if (!expiry) {
+    throw new TypeError("Error generating VP Token: expiry cannot be empty");
+  }
+
+  const payload = new Object();
+  Object.defineProperty(payload, "nonce", {
+    value: this.nonce,
+  });
+  Object.defineProperty(payload, "vp", {
+    value: vp,
+  });
+  Object.defineProperty(payload, "aud", {
+    value: this.client_id,
+  });
+  Object.defineProperty(payload, "iss", {
+    value: kid.split("#")[0],
+  });
+  Object.defineProperty(payload, "exp", {
+    value: expiry,
+  });
+
+  return await signJWT({ header, payload });
 }