fix: add case insensitive check for X-Goog-Content-SHA256 in SignatureInfo #3337
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BenWhitehead
approved these changes
Oct 8, 2025
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Fixes b/450079023
Based on this bug, the x-goog-content-sha256 header was not being correctly included in the V4 signature, leading to SignatureDoesNotMatch error. The issue was caused by a case-sensitive get() on the headers map, which failed to find the user-provided lowercase header.
Added a case insensitive check and a corresponding test to verify the fix