Thanks Christopher. Deterministic hashes ... absolutely essential! > On Feb 15, 2023, at 17:59, Christopher Allen <christophera@lifewithalacrity.com> wrote: > > Since I know that many projects in the broader Credentials Community already use CBOR, I'd like to announce Blockchain Commons' release of dCBOR libraries for Rust and Swift. In particular, these two languages demonstrate our support of use cases for dCBOR for mobile in Android and iOS: > dCBOR Codec for Rust: https://github.com/BlockchainCommons/bc-dcbor-rust > dCBOR Codec for Swift: https://github.com/BlockchainCommons/BCSwiftDCBOR > We've also produced a CLI app using our Rust library, which can be used to test parsing and validation: > dCBOR CLI: https://github.com/BlockchainCommons/dcbor-cli > We focused on the deterministic flavor of CBOR per ยง4.2 of RFC-8949 <https://www.rfc-editor.org/rfc/rfc8949.html#name-deterministically-encoded-c>because of our specific need to produce deterministically repeatable hashes in the Merkle Tree underlying our Gordian Envelope <https://www.blockchaincommons.com/introduction/Envelope-Intro/> data format. We suspect that there will be others with similar needs and hope these dCBOR libraries will prove useful for other specs & standards using CBOR! > > I'd love to get any advice, comments, or thoughts you have on our dCBOR libraries, as well as any requirements that the libraries may need to meet. I'd also appreciate to get any CCG-related CBOR test examples that we can use in documents and examples, such as mDL and COSE tests. > > I'm also happy to discuss why we picked CBOR <https://www.blockchaincommons.com/introduction/Why-CBOR/> as a data format and why dCBOR is particularly advantageous, either here or in our discussion forums at GitHub <https://github.com/orgs/BlockchainCommons/discussions/184>. > > Thanks! > > -- Christopher Allen > Blockchain Commons
Received on Wednesday, 22 February 2023 20:00:32 UTC