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igr001-galactica
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Jan 26, 2026
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Fixes #45
Previously, the ALPN two-character code was derived by blindly taking the first and last characters of the ALPN string, which could produce invalid results. The new logic implements the JA4 specification: ASCII-alphanumeric values are used directly, with a hexadecimal fallback for other cases.
This change aligns JA4, JA4 String, and JA4one outputs and adds tests covering edge cases.