next/dist/esm/server/app-render/encryption.js

The React Framework

/* eslint-disable import/no-extraneous-dependencies */ import 'server-only';
/* eslint-disable import/no-extraneous-dependencies */ import { renderToReadableStream } from 'react-server-dom-webpack/server.edge';
/* eslint-disable import/no-extraneous-dependencies */ import { createFromReadableStream } from 'react-server-dom-webpack/client.edge';
import { streamToString } from '../stream-utils/node-web-streams-helper';
import { arrayBufferToString, decrypt, encrypt, getActionEncryptionKey, getClientReferenceManifestForRsc, getServerModuleMap, stringToUint8Array } from './encryption-utils';
const isEdgeRuntime = process.env.NEXT_RUNTIME === 'edge';
const textEncoder = new TextEncoder();
const textDecoder = new TextDecoder();
async function decodeActionBoundArg(actionId, arg) {
    const key = await getActionEncryptionKey();
    if (typeof key === 'undefined') {
        throw new Error(`Missing encryption key for Server Action. This is a bug in Next.js`);
    }
    // Get the iv (16 bytes) and the payload from the arg.
    const originalPayload = atob(arg);
    const ivValue = originalPayload.slice(0, 16);
    const payload = originalPayload.slice(16);
    const decrypted = textDecoder.decode(await decrypt(key, stringToUint8Array(ivValue), stringToUint8Array(payload)));
    if (!decrypted.startsWith(actionId)) {
        throw new Error('Invalid Server Action payload: failed to decrypt.');
    }
    return decrypted.slice(actionId.length);
}
async function encodeActionBoundArg(actionId, arg) {
    const key = await getActionEncryptionKey();
    if (key === undefined) {
        throw new Error(`Missing encryption key for Server Action. This is a bug in Next.js`);
    }
    // Get 16 random bytes as iv.
    const randomBytes = new Uint8Array(16);
    crypto.getRandomValues(randomBytes);
    const ivValue = arrayBufferToString(randomBytes.buffer);
    const encrypted = await encrypt(key, randomBytes, textEncoder.encode(actionId + arg));
    return btoa(ivValue + arrayBufferToString(encrypted));
}
// Encrypts the action's bound args into a string.
export async function encryptActionBoundArgs(actionId, args) {
    const { clientModules } = getClientReferenceManifestForRsc();
    // Using Flight to serialize the args into a string.
    const serialized = await streamToString(renderToReadableStream(args, clientModules));
    // Encrypt the serialized string with the action id as the salt.
    // Add a prefix to later ensure that the payload is correctly decrypted, similar
    // to a checksum.
    const encrypted = await encodeActionBoundArg(actionId, serialized);
    return encrypted;
}
// Decrypts the action's bound args from the encrypted string.
export async function decryptActionBoundArgs(actionId, encrypted) {
    const { edgeRscModuleMapping, rscModuleMapping } = getClientReferenceManifestForRsc();
    // Decrypt the serialized string with the action id as the salt.
    const decrypted = await decodeActionBoundArg(actionId, await encrypted);
    // Using Flight to deserialize the args from the string.
    const deserialized = await createFromReadableStream(new ReadableStream({
        start (controller) {
            controller.enqueue(textEncoder.encode(decrypted));
            controller.close();
        }
    }), {
        serverConsumerManifest: {
            // moduleLoading must be null because we don't want to trigger preloads of ClientReferences
            // to be added to the current execution. Instead, we'll wait for any ClientReference
            // to be emitted which themselves will handle the preloading.
            moduleLoading: null,
            moduleMap: isEdgeRuntime ? edgeRscModuleMapping : rscModuleMapping,
            serverModuleMap: getServerModuleMap()
        }
    });
    return deserialized;
}

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