Hello all, I'm currently working on a userspace block device driver. I want to add encryption on it, and that's how I came across GPGME.
My question is: is there a way to encrypt a plaintext and get a ciphertext of **exactly** the same size? Is there any way to have FPE (Format Preserving Encryption) via GPGME? >From my research so far, it doesn't seem to exist one. Even symmetric algorithms are using metadata on the ciphertext so the size is always bigger than the corresponding plaintext. All suggestions are welcome! Thanks.
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