Fork of luks2

Original: https://sr.ht/~mvforell/luks2/

Interact with (currently: read metadata and data from) LUKS2 partitions from Rust.

Build with RUSTFLAGS="-C target-feature=+aes" to use the AES processor instruction set (if available on your platform).

Changes compared to original

• fix a bug where decryption fails due to an invalid iv when the sector_size is not 512
• add no_std support
• fix a bug where the final 16MB (segment-offset) of a segment weren't read
• fix a bug where the last sector wasn't read fully
• add LuksHeader::uuid function
• allow opening a LuksDevice with an existing SecretMasterKey
• fix a bug where decryption fails if keyslot and segmentslot aren't equal
• add sha1 support