Fix unhandled NumberFormatException in webhook timestamp parsing#2149
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Nepomuk5665 wants to merge 1 commit intostripe:masterfrom
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Fix unhandled NumberFormatException in webhook timestamp parsing#2149Nepomuk5665 wants to merge 1 commit intostripe:masterfrom
Nepomuk5665 wants to merge 1 commit intostripe:masterfrom
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Nepomuk5665
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When parsing the Stripe-Signature header, getTimestamp() calls Long.parseLong() on the timestamp value without catching NumberFormatException. If a malformed header contains a non-numeric timestamp value (e.g., 't=not_a_number'), the exception propagates up uncaught, rather than being wrapped in a SignatureVerificationException as documented. This commit catches NumberFormatException and returns -1, which causes verifyHeader() to throw the expected SignatureVerificationException with the message 'Unable to extract timestamp and signatures from header'. Also adds a test case for malformed timestamp values.
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ramya-stripe
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Thank you for the PR @Nepomuk5665 |
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@Nepomuk5665 Can you first open a GitHub Issue to outline the issue you are experiencing? That would be helpful context to understand what problem you are trying to solve here. Thanks! |
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Summary
Fixes an unhandled exception in webhook signature verification when the
Stripe-Signatureheader contains a non-numeric timestamp value.Problem
In
Webhook.Signature.getTimestamp(),Long.parseLong()is called on the timestamp value extracted from the header without exception handling. If a malformed header is received with a non-numeric timestamp (e.g.,t=not_a_number,v1=signature), aNumberFormatExceptionis thrown and propagates up uncaught.This violates the documented contract of
verifyHeader()andconstructEvent(), which state they throwSignatureVerificationExceptionwhen verification fails.Solution
Catch
NumberFormatExceptioningetTimestamp()and return-1, which causesverifyHeader()to throw the expectedSignatureVerificationExceptionwith the message "Unable to extract timestamp and signatures from header".Testing
Added a test case
testMalformedTimestampValue()that verifies the fix by passing a header with a non-numeric timestamp and asserting thatSignatureVerificationExceptionis thrown (notNumberFormatException).