%PDF-
%PDF-
Mini Shell
Mini Shell
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Signer = void 0;
const sigstore = __importStar(require("./types/sigstore"));
const util_1 = require("./util");
class Signer {
constructor(options) {
this.identityProviders = [];
this.ca = options.ca;
this.tlog = options.tlog;
this.tsa = options.tsa;
this.identityProviders = options.identityProviders;
this.tlogUpload = options.tlogUpload ?? true;
this.signer = options.signer || this.signWithEphemeralKey.bind(this);
}
async signBlob(payload) {
// Get signature and verification material for payload
const sigMaterial = await this.signer(payload);
// Calculate artifact digest
const digest = util_1.crypto.hash(payload);
// Create a Rekor entry (if tlogUpload is enabled)
const entry = this.tlogUpload
? await this.tlog.createMessageSignatureEntry(digest, sigMaterial)
: undefined;
return sigstore.toMessageSignatureBundle({
digest,
signature: sigMaterial,
tlogEntry: entry,
timestamp: this.tsa
? await this.tsa.createTimestamp(sigMaterial.signature)
: undefined,
});
}
async signAttestation(payload, payloadType) {
// Pre-authentication encoding to be signed
const paeBuffer = util_1.dsse.preAuthEncoding(payloadType, payload);
// Get signature and verification material for pae
const sigMaterial = await this.signer(paeBuffer);
const envelope = {
payloadType,
payload: payload,
signatures: [
{
keyid: sigMaterial.key?.id || '',
sig: sigMaterial.signature,
},
],
};
// Create a Rekor entry (if tlogUpload is enabled)
const entry = this.tlogUpload
? await this.tlog.createDSSEEntry(envelope, sigMaterial)
: undefined;
return sigstore.toDSSEBundle({
envelope,
signature: sigMaterial,
tlogEntry: entry,
timestamp: this.tsa
? await this.tsa.createTimestamp(sigMaterial.signature)
: undefined,
});
}
async signWithEphemeralKey(payload) {
// Create emphemeral key pair
const keypair = util_1.crypto.generateKeyPair();
// Retrieve identity token from one of the supplied identity providers
const identityToken = await this.getIdentityToken();
// Extract challenge claim from OIDC token
const subject = util_1.oidc.extractJWTSubject(identityToken);
// Construct challenge value by encrypting subject with private key
const challenge = util_1.crypto.signBlob(Buffer.from(subject), keypair.privateKey);
// Create signing certificate
const certificates = await this.ca.createSigningCertificate(identityToken, keypair.publicKey, challenge);
// Generate artifact signature
const signature = util_1.crypto.signBlob(payload, keypair.privateKey);
return {
signature,
certificates,
key: undefined,
};
}
async getIdentityToken() {
const aggErrs = [];
for (const provider of this.identityProviders) {
try {
const token = await provider.getToken();
if (token) {
return token;
}
}
catch (err) {
aggErrs.push(err);
}
}
throw new Error(`Identity token providers failed: ${aggErrs}`);
}
}
exports.Signer = Signer;
Zerion Mini Shell 1.0