in lib/sigv4-auth-signature.js [184:205]
function computeSigV4SignatureCassandraRequest({
region,
nonce,
date,
accessKeyId,
secretAccessKey,
sessionToken
}) {
let isoDate = date.toISOString();
let credentialDateStamp = toCredentialDateStamp(date);
let nonceHash = CryptoJS.SHA256(nonce);
let signingScope = deriveSigningScope(credentialDateStamp, region);
let cannoicalRequest = deriveCanonicalRequest(accessKeyId, signingScope, isoDate, nonceHash);
let signingKey = deriveSigningKey(secretAccessKey, credentialDateStamp, region);
let stringToSign = createStringToSign(cannoicalRequest, isoDate, signingScope);
let signature = computeSignature(stringToSign, signingKey);
return formSignedString(signature, accessKeyId, isoDate, sessionToken);
}