https://chronox.de/libkcapi/releases/1.5.1/index.html libkcapi Source Code libkcapi Source Code_Signature Changelog remove tests of ansi_cprng apply change suggestions derived from Claude code kcapi-enc: add tag processing in decryption without ciphertext for completeness reason fix memory corruption (CVE-2026-71226) fix potential for an infinite loop (CVE-2026-71227) add safety measure to prevent IV reuse (CVE-2026-71225) Hugo en-us