Validate COSE receipt proof hash sizes#8100
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Reject malformed SHA-256 proof components during COSE decoding and defensively before root recomputation. Add focused receipt mutations and manual-proof regressions for exact hash sizes. Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: acbb0330-193e-4aa1-ad40-dfed15b7d5b1
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Summary
This is the standalone memory-safety fix split out of #8092 and has no dependency on its recovery-sidecar changes.
Tests
cmake --build build --target cose_test --parallel 4withCLANG_TIDY=ONctest --test-dir build -VV -R "^cose_test$"(5 test cases, 184 assertions)scripts/cpp-format-checks.sh -fscripts/includes-checks.shscripts/copyright-checks.shscripts/ascii-checks.shgit diff --check