This tool will help you to Parse JWS Object and determine the JWS Header, Payload and Signature
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A JWS is represented as the concatenation of
BASE64URL(UTF8(JWS Protected Header)) || '.' ||
BASE64URL(JWS Payload) || '.' ||
BASE64URL(JWS Signature)
In the JWS JSON Serialization, a JWS is represented as a JSON object containing some or all of these four members:
BASE64URL(UTF8(JWS Protected Header))
{"alg":"HS256"}
BASE64URL(UTF8(JWS Protected Header))
gives this value:eyJhbGciOiJIUzI1NiJ9
BASE64URL(JWS Payload)
for example the payload{
"sub": "1234567890",
"name": "Anish Nath",
"iat": 1516239022
}
Encoding this JWS Payload as BASE64URL(JWS Payload)
gives this value
ew0KICAic3ViIjogIjEyMzQ1Njc4OTAiLA0KICAibmFtZSI6ICJBbmlzaCBOYXRoIiwNCiAgImlhdCI6IDE1MTYyMzkwMjINCn0
BASE64URL(JWS Signature)
Computing the HMAC with the HMAC9tFLrurxXWKBDh317ly24fP03We-uzSZtPf7Yqy_oSw