manifest: use cbor-diag module

Use the `cbor-diag` ruby gem instead of CBOR2 to manifest encoding and
decoding. It seems to encode and decode more accurately over the CBOR2
module. Manifests serialized by CBOR2 could not be properly
decoded by `cbor.me`.

Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>

.gitignore

@@ -9,4 +9,6 @@ certs/slot*/bundle*
 certs/slot*/immutable.sha
 manifest.cbor
 manifest/manifest.out.cbor
+manifest/responder_manifest.cbor
+manifest/*.pretty
 

Cargo.toml

@@ -23,6 +23,7 @@ path = "src/main.rs"
 
 [build-dependencies]
 bindgen = "0.63"
+which = "6.0.0"
 
 [dependencies]
 log = "0.4"
@@ -34,10 +35,7 @@ memmap2 = { version = "0.5", optional = true}
 once_cell = { version = "1.16", optional = true}
 sha2 = { version = "0.10", optional = true}
 env_logger = { version = "0.10", optional = true}
+colored = "2.1.0"
+which = "6.0.0"
 
 libmctp = { git = "https://github.com/westerndigitalcorporation/libmctp.git" }
-
-[dependencies.pyo3]
-version = "0.20.2"
-features = ["auto-initialize", "abi3-py312"]
-

README.md

@@ -51,14 +51,37 @@ You will also need a few host dependencies
 sudo dnf install cmake clang-libs clang-devel pciutils-devel openssl openssl-devel python3-devel
 ```
 
-## Python
+## Ruby
 
-spdm-utils requires the [cbor2](https://pypi.org/project/cbor2/) python module for manifest encoding and decoding. It can be installed with:
+`spdm-utils` uses the [cbor-diag](https://github.com/cabo/cbor-diag) ruby gem for
+manifest encoding and decoding. Similar to the implementation of this [CBOR parsing](https://cbor.me/)
+online tool.
 
+You will first need to have `gem` installed, this is a the package manager for ruby.
+For example, for Fedora you can install it with:
+
+```shell
+$ sudo dnf install gem
+```
+
+After which, you can install `cbor-diag`
+
+```shell
+$ gem install cbor-diag
 ```
-$ pip install cbor2
+
+The default binary path *should* be, `$HOME/bin/`, which you may need to add to
+your `PATH`. You can test that the scripts are usable with
+
+```shell
+$ which cbor2diag.rb
+home/<user>/bin/cbor2diag.rb
 ```
 
+When building `spdm-utils` it will generate a `manifest.out.cbor` which contains
+the serialised cbor manifest, and also a `manifest.pretty` which is the *pretty* format
+of the manifest (user friendly).
+
 # Building
 
 Initialise all sub-modules