Cocoon TPM project - cocoon-tpm-storage crate

This [no_std] crate provides secure persistent storage functionality.

Most importantly, it defines the NvFs trait as a common interface to filesystem functionality required by other crates in the project, and an implementation for the CocoonFs filesystem format thereof.

CocoonFs is a special purpose filesystem format designed for the secure storage of sensitive data in e.g. a TEE setting. In addition to its primary design focus on strong security properties, the format implements support for some features of particular relevance to the intended use-case, such as support for keyless storage volume provisiong and robustness against service interruptions by means of a journal.

For the format specification, refer to file cocoonfs-format.md distributed with the code, see here for a rendered version.