acme-http-01-azure-key-vault-middleware/src/middleware/azure-functions.js

Use Let's Encrypt and other RFC 8555 providers natively and securely on Azure

const fetchChallengeResponse = require('./fetchChallengeResponse');

module.exports = ({ azureCredential, azureKeyVaultName }) => {
  return async context => {
    let challengeResponse;

    try {
      challengeResponse = await fetchChallengeResponse({ azureCredential, azureKeyVaultName, token: context.bindingData.token });
    } catch (err) {
      context.log(err.message);

      if (err instanceof TypeError) {
        context.res = { status: 400 };

        return;
      }

      context.res = { status: 404 };

      return;
    }

    context.res = { body: challengeResponse };
  };
};