feat: OpenID Connect Federation 1.0

[peppelinux]

covers #52

this branch contains the federation features that must be integrated in the trust evaluation methods of the backend

tasks:

• resolve issue trust evaluation  #52

Resources to be integrated in this PR

The test files to be migrated in this project are the ones listed below

mocked responses

Allows to use the http client for requesting several EC and ES and collecting the trust chain we desire for tests.
https://github.com/italia/spid-cie-oidc-django/blob/main/spid_cie_oidc/authority/tests/mocked_responses.py

this is required as it is, just remove the django refs/deps

https://github.com/italia/spid-cie-oidc-django/blob/main/spid_cie_oidc/entity/tests/test_09_trust_chain.py

this requires the file trust_chain_operations.py (TO BE MIGRATED and integrated with the storage interface)

https://github.com/italia/spid-cie-oidc-django/blob/main/spid_cie_oidc/authority/tests/test_02_trust_anchor_intermediary.py#L272

Demo

Here a tutorial for making an onboarding demo with a fully working trust anchor
https://github.com/italia/spid-cie-oidc-django/tree/main/examples/wallet_trust_anchor/tutorial

[peppelinux]

The test files to be migrated in this project are the ones listed below

mocked responses

Allows to use the http client for requesting several EC and ES and collecting the trust chain we desire for tests.
https://github.com/italia/spid-cie-oidc-django/blob/main/spid_cie_oidc/authority/tests/mocked_responses.py

this is required as it is, just remove the django refs/deps

https://github.com/italia/spid-cie-oidc-django/blob/main/spid_cie_oidc/entity/tests/test_09_trust_chain.py

this requires the file trust_chain_operations.py (TO BE MIGRATED and integrated with the storage interface)

https://github.com/italia/spid-cie-oidc-django/blob/main/spid_cie_oidc/authority/tests/test_02_trust_anchor_intermediary.py#L272

@PascalDR @salvatorelaiso ^

[peppelinux]

@PascalDR this is the mongodb collection that me and you have produced in pair

This must be handled in the current storage engine (mongodb) and also requires methods in the backend to fetch/store and update the definitions (TA and trust chains)

{
  "trust": {
    "anchors": {
       "https://ta.example.org": {
          "federation": {
            "entity_configuration": "str(EC), -> EC contains the federation entity public keys,
            "exp": datetime
         },
          "x509": {
            "pem": str(PEM) -> contains public keys,
            "exp": datetime
       }
    },
    "chains": {
       "https://wallet_provider.example.org": {
          "federation" : {
            "chain": ARRAY[EC,ES,ES],
            "exp": datetime,
            "update": datetime
          }
          "x509": {
             "x5c": ARRAY[bytestring(DER), bytestring(DER), bytestring(DER)] -> contains public keys,
            "exp": datetime
       }
    }
  }
}