Unable to verify signature of AWS JWTs

Bắt đầu với bản tái hiện TypeScript tại jsonwebtoken.verify và so sánh các đầu vào cùng tùy chọn của nó với lệnh gọi jwt.decode trong Python; issue không nêu tệp hoặc bài kiểm thử nào trong repository. Xác định lý do cùng một ES256 JWT và khóa PEM tạo ra các kết quả xác minh khác nhau, sau đó ghi lại một nguyên nhân có thể tái hiện và xác nhận hành vi xác minh khớp nhau mà không làm suy yếu các kiểm tra chữ ký.

Description

I have some JWTs obtained from AWS/Cognito with the Elastic Load Balancer performing authentication for me. I also have the associated public key from the documented endpoints for the Cognito userpool. However the jsonwebtoken library says the signature is invalid (JsonWebTokenError: invalid signature), except when I use the same input (same JWT and public key in PEM format) in PyJWT Python code, this decodes/verifies without issue. There is no information to point to why jsonwebtoken is unable to verify the JWT/PEM when another library (PyJWT) can. I have tried ignoring any expiration checking in case this is the cause of the "invalid signature", such as ignoreExpiration, clockTolerance, and maxAge, without success. The only discrepancy I can see is the jsonwebtoken library must remove the base64 padding (=) from the JWT first.
Is there any known reason why jsonwebtoken would be unable to verify a signature which can be verified with another library? Perhaps some assumptions about the format/layout/syntax of the inputs which AWS/Cognito is not respecting.

Reproduction

Python code:

import jwt
import requests
import base64
import json

encoded_jwt = """eyJ0e
......
tE5Bg=="""

pub_key = """-----BEGIN PUBLIC KEY-----
MFkw
.....
J5og==
-----END PUBLIC KEY-----"""

payload = jwt.decode(encoded_jwt, pub_key, algorithms=['ES256'], leeway=10000)
print('Payload: '+ str(payload)) #This works fine

TypeScript code:

userJWT = userJWT.replace(/=/g, '');

// This fails, with  JsonWebTokenError: invalid signature
return jsonwebtoken.verify(userJWT, this.pem,
{algorithms: ['ES256'], ignoreExpiration: true, clockTolerance: 100000, maxAge: "1 day"});

Environment

Please provide the following:

• Version of this library used:
• jsonwebtokens=8.5.1
• PyJWT = 1.7.1
• Version of the platform or framework used, if applicable:
• Python 3.8.10
• Node v17.4.0
• Other relevant versions (language, server software, OS, browser):
• Ubuntu 21.04 (Kernel 5.14)
• Other modules/plugins/libraries that might be involved: