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bradleycha / cliauth

Minimal cross-platform terminal authenticator app.
GNU General Public License v3.0
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Create IO interface to support random access #5

Open bradleycha opened 1 month ago

bradleycha commented 1 month ago

Currently, it's impossible to read or write arbitrary bytes using IO streams. Once a byte is read or written, the stream cannot be re-winded, and it's not possible to skip an arbitrary number of bytes. This will be a requirement for future encryption to function. A new interface should be added alongside the existing stream interface to support random access for both reading and writing.

bradleycha commented 3 weeks ago

This IO subsystem could be called "mappers". For example, "CliAuthIoFileMapper", "CliAuthIoAes256Mapper", etc. Bytes could be read like "cliauth_io_mapper_read(const CliAuthIoMapper context, CliAuthUInt8 output [], CliAuthUInt32 bytes, CliAuthUInt32 offset)", and written like "cliauth_io_mapper_write(const CliAuthIoMapper context, const CliAuthUInt8 data [], CliAuthUInt32 bytes, CliAuthUInt32 offset)".