@azure/msal-common
Version:
Microsoft Authentication Library for js
75 lines (72 loc) • 2.47 kB
JavaScript
/*! @azure/msal-common v16.6.2 2026-05-19 */
;
import { RESOURCE_DELIM } from './Constants.mjs';
import { createClientAuthError } from '../error/ClientAuthError.mjs';
import { noCryptoObject, invalidState } from '../error/ClientAuthErrorCodes.mjs';
/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
/**
* Appends user state with random guid, or returns random guid.
* @param cryptoObj
* @param userState
* @param meta
*/
function setRequestState(cryptoObj, userState, meta) {
const libraryState = generateLibraryState(cryptoObj, meta);
return userState
? `${libraryState}${RESOURCE_DELIM}${userState}`
: libraryState;
}
/**
* Generates the state value used by the common library.
* @param cryptoObj
* @param meta
*/
function generateLibraryState(cryptoObj, meta) {
if (!cryptoObj) {
throw createClientAuthError(noCryptoObject);
}
// Create a state object containing a unique id and the timestamp of the request creation
const stateObj = {
id: cryptoObj.createNewGuid(),
};
if (meta) {
stateObj.meta = meta;
}
const stateString = JSON.stringify(stateObj);
return cryptoObj.base64Encode(stateString);
}
/**
* Parses the state into the RequestStateObject, which contains the LibraryState info and the state passed by the user.
* @param base64Decode
* @param state
*/
function parseRequestState(base64Decode, state) {
if (!base64Decode) {
throw createClientAuthError(noCryptoObject);
}
if (!state) {
throw createClientAuthError(invalidState);
}
try {
// Split the state between library state and user passed state and decode them separately
const splitState = state.split(RESOURCE_DELIM);
const libraryState = splitState[0];
const userState = splitState.length > 1
? splitState.slice(1).join(RESOURCE_DELIM)
: "";
const libraryStateString = base64Decode(libraryState);
const libraryStateObj = JSON.parse(libraryStateString);
return {
userRequestState: userState || "",
libraryState: libraryStateObj,
};
}
catch (e) {
throw createClientAuthError(invalidState);
}
}
export { generateLibraryState, parseRequestState, setRequestState };
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