From 00c806e9c29ff74668a0fcc66bbe413309cc1da1 Mon Sep 17 00:00:00 2001
From: Takafumi Umemoto <takafumi.umemoto@gmail.com>
Date: Sat, 11 Mar 2023 01:34:46 +0900
Subject: [PATCH] Fixed the condition to judge as valid iat

---
 src/jwt-decoder.ts        |  2 +-
 tests/jwt-decoder.test.ts | 11 -----------
 2 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/src/jwt-decoder.ts b/src/jwt-decoder.ts
index fed3720..41d8eb9 100644
--- a/src/jwt-decoder.ts
+++ b/src/jwt-decoder.ts
@@ -96,7 +96,7 @@ const decodePayload = (payloadPart: string, currentTimestamp: number): DecodedPa
     throw new JwtError(JwtErrorCode.INVALID_ARGUMENT, `"iat" claim must be a number but got "${payload.iat}"`);
   }
 
-  if (currentTimestamp <= payload.iat) {
+  if (currentTimestamp < payload.iat) {
     throw new JwtError(
       JwtErrorCode.INVALID_ARGUMENT,
       `Incorrect "iat" claim must be a older than "${currentTimestamp}" (iat: "${payload.iat}")`
diff --git a/tests/jwt-decoder.test.ts b/tests/jwt-decoder.test.ts
index 2b06d44..c7b17e7 100644
--- a/tests/jwt-decoder.test.ts
+++ b/tests/jwt-decoder.test.ts
@@ -87,17 +87,6 @@ describe('TokenDecoder', () => {
           `Incorrect "iat" claim must be a older than "${currentTimestamp}" (iat: "${currentTimestamp + 10000}")`
         ),
       ],
-      [
-        'iat is now',
-        {
-          ...payload,
-          iat: currentTimestamp,
-        },
-        new JwtError(
-          JwtErrorCode.INVALID_ARGUMENT,
-          `Incorrect "iat" claim must be a older than "${currentTimestamp}" (iat: "${currentTimestamp}")`
-        ),
-      ],
       [
         'exp is in past',
         {