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increased readability of hmac comparison input conditions

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This commit is contained in:
wouterboe
2021-04-21 17:13:24 +02:00
parent fda407dc93
commit 1908978e03
1 changed files with 1 additions and 1 deletions
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2
src/utils/hmacValidator.ts
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@@ -37,7 +37,7 @@ class HmacValidator {
if (notificationRequestItem.additionalData?.[ApiConstants.HMAC_SIGNATURE]) {
const expectedSign = this.calculateHmac(notificationRequestItem, key);
const merchantSign = notificationRequestItem.additionalData?.[ApiConstants.HMAC_SIGNATURE];
if(typeof merchantSign !== "undefined" && expectedSign.length === merchantSign.length) {
if(merchantSign && expectedSign.length === merchantSign.length) {
return timingSafeEqual(
Buffer.from(expectedSign, "base64"),
Buffer.from(merchantSign, "base64")