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`bigIntArrayToUnsignedInt` used the signed `<<` operator, so when the most significant byte of a 4-byte input had its top bit set (e.g. `[0x80, 0x00, 0x00, 0x01]`) the result was a negative Int32 instead of the intended unsigned 32-bit value. This caused any RSA `publicExponent` exactly 4 bytes long with the top bit set to be parsed incorrectly. Coerce the final value with `>>> 0` and add a unit test. Assisted-by: Claude <noreply@anthropic.com> Co-Authored-By: Claude <noreply@anthropic.com> Co-Authored-By: DeepView Autofix <276251120+deepview-autofix@users.noreply.github.com> Co-Authored-By: Nikita Skovoroda <chalkerx@gmail.com> Signed-off-by: Nikita Skovoroda <chalkerx@gmail.com> PR-URL: https://github.com/nodejs/node/pull/62839 Reviewed-By: Filip Skokan <panva.ip@gmail.com>