36 lines
979 B
TypeScript
36 lines
979 B
TypeScript
import { promisify } from 'util';
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import xml2js from 'xml2js';
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import { inflateRaw } from 'zlib';
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const inflateRawAsync = promisify(inflateRaw);
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// Parse XML
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const parseXML = (xml: string): Promise<Record<string, any>> => {
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return new Promise((resolve, reject) => {
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xml2js.parseString(xml, (err: Error, result: any) => {
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if (err) {
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reject(err);
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}
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resolve(result);
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});
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});
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};
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// Parse SAMLRequest attributes
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const extractSAMLRequestAttributes = async (samlRequest: string) => {
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const request = (await inflateRawAsync(Buffer.from(samlRequest, 'base64'))).toString();
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const result = await parseXML(request);
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const attributes = result['samlp:AuthnRequest']['$'];
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const issuer = result['samlp:AuthnRequest']['saml:Issuer'];
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return {
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id: attributes.ID,
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acsUrl: attributes.AssertionConsumerServiceURL,
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providerName: attributes.ProviderName,
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audience: issuer[0]['_'],
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};
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};
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export { extractSAMLRequestAttributes };
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