Use BCL CipherMode enum for AesCipher class#1564

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scott-xu wants to merge 2 commits intosshnet:developfrom

scott-xu:bcl-ciphermode

Commits on Nov 22, 2025

Use BCL CipherMode enum for AesCipher class just like TripleDesCipher class; Create a dedicated AesCtrCipher class just like AesGcmCipher class.
scott-xu
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Commits on Nov 23, 2025

ECB is weak and not used anywhere.
scott-xu
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