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fix(initiateAuth): check refresh token expiration #406

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fix(initiateAuth): check refresh token expiration #406

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12 changes: 12 additions & 0 deletions src/targets/initiateAuth.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ import {
InitiateAuthRequest,
InitiateAuthResponse,
} from "aws-sdk/clients/cognitoidentityserviceprovider";
import jwt, { JwtPayload } from "jsonwebtoken";
import { v4 } from "uuid";
import {
InvalidParameterError,
Expand Down Expand Up @@ -233,6 +234,17 @@ const refreshTokenAuthFlow = async (
throw new InvalidParameterError("AuthParameters REFRESH_TOKEN is required");
}

// check if the refresh token is expired
const decodedRefreshToken = jwt.decode(
req.AuthParameters.REFRESH_TOKEN
) as JwtPayload;
if (
!decodedRefreshToken.exp ||
(decodedRefreshToken.exp && decodedRefreshToken.exp < Date.now() / 1000)
) {
throw new NotAuthorizedError();
}

const user = await userPool.getUserByRefreshToken(
ctx,
req.AuthParameters.REFRESH_TOKEN
Expand Down
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