I'm trying to implement AWS4 authentication betwee...
# suitescriptk
Keir Kettle
08/05/2022, 4:42 PMI'm trying to implement AWS4 authentication between NS and AWS. Basically it requires you to successively generate HMACs of elements of the secret and request (like date, service name etc) which become the key for the next HMAC. I thought the N/crypto module would help me but it seems that it will only create HMACs for with keys stored in the secrets management. Obviously this will not work - does anyone have any ideas?
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Eric B
08/05/2022, 4:44 PMAre you just trying to generate a signature to connect to Amazon's API?
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Keir Kettle
08/05/2022, 4:44 PMyes
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Eric B
08/05/2022, 4:49 PMI used Crypto.JS from Google and wrote some wrapper functions to handle that. That's step one.
Eric B
08/05/2022, 4:49 PMfunction getAWSSignatureKey(key, dateStamp, regionName, serviceName) {Eric B
08/05/2022, 4:49 PMthat's my function for generating the AWS signature
Eric B
08/05/2022, 4:50 PMThis is how I'm calling that function.
Eric B
08/05/2022, 4:50 PMvar signing_key = CryptoJS.getAWSSignatureKey(secret_key, datestamp, region, service);
var signingsha256Data = CryptoJS.createHmacSHA256Crypto(string_to_sign, signing_key)
var signature = CryptoJS.HmacSHA256ToHexCrypto(signingsha256Data);
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Keir Kettle
08/05/2022, 4:51 PMsweet, thanks dude
Keir Kettle
08/05/2022, 4:51 PMI'll take a look
👍 1
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Eric B
08/05/2022, 4:53 PMthe other two functions in my CryptoJS library module are
Eric B
08/05/2022, 4:53 PMfunction createHmacSHA256Crypto(stringToHmac, secret) {
return CryptoJS.HmacSHA256(stringToHmac, secret);
}
function HmacSHA256ToHexCrypto(signingsha256Data) {
return CryptoJS.enc.Hex.stringify(signingsha256Data);
}