Enforce 192-bit key length for TripleDES #13928
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TripleDES now emits a deprecation warning when 8-byte (single DES) or 16-byte (two-key) keys are passed. In a future release, only 24-byte (192-bit) keys will be accepted. Users needing single DES or two-key Triple DES compatibility should expand the key themselves: - Single DES (8 bytes): key + key + key - Two-key 3DES (16 bytes): key + key[:8]
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TripleDES now only accepts 24-byte (192-bit) keys. Users needing single DES (1-key) or two-key Triple DES compatibility must expand the key themselves:
This change removes the automatic key expansion that was previously done in the TripleDES constructor, making the key length requirement explicit and preventing accidental use of weaker key configurations.