This is a proof of concept project that runs a SPIFFE Workload API service meant to provide user-based SVIDs on developer endpoints, bootstrapped from an SSO login. This demo in particular integrates with OIDC providers to enable user login, but generalizes to any web application SSO.
I'm hosting a demo server, configured with Google's OIDC provider. You can run the spiffe-user-demo to start up a workload API service on your endpoint. You can run a workload API instance on your workstation by using the binary from this repo without any arguments: ./spiffe-user-demo.
Using spiffe-watcher, this is an example of the X.509-SVIDs that get retrieved from the endpoint.
$ spiffe-watcher
2020/09/27 15:28:17 jwt bundle updated "spiffe-user-demo.fly.dev": {"keys":[{"kty":"EC","kid":"1","crv":"P-256","x":"i5bOW6bqc_D-KV4-O9TIvt_5VJvPpqnolQCgcwrREz8","y":"-6SOM0wF813sH_fMW-8iQGdNNIxryTjeszYBDGu78c4"}]}
2020/09/27 15:28:17 SVID updated for "spiffe://spiffe-user-demo.fly.dev/[email protected]":
-----BEGIN CERTIFICATE-----
MIIBszCCAVqgAwIBAgISAbDYa/82lma7zLepQuml5TzVMAoGCCqGSM49BAMCMDUx
EDAOBgNVBAoTB0FjbWUgQ28xITAfBgNVBAMTGFVzZXIgU1BJRkZFIERlbW8gUm9v
dCBDQTAeFw0yMDA5MjcyMTI2MzdaFw0yMDA5MjkyMjI2MzdaMAAwWTATBgcqhkjO
PQIBBggqhkjOPQMBBwNCAASMSYZNs764pzyvILCmAYUjL6iQxpE5CFHULAppQmtr
rc1ZcgJZSyIvQC/HtgG+i5DcXrFvCo9oAsU+XlZXe/Iro38wfTAOBgNVHQ8BAf8E
BAMCA7gwEwYDVR0lBAwwCgYIKwYBBQUHAwMwDAYDVR0TAQH/BAIwADBIBgNVHREB
Af8EPjA8hjpzcGlmZmU6Ly9zcGlmZmUtdXNlci1kZW1vLmhlcm9rdWFwcC5jb20v
aWFuaGFrZW5AZ21haWwuY29tMAoGCCqGSM49BAMCA0cAMEQCIA4LF4uyNZ02m6My
4SUNGQUPNWIkQFlRZ3pit/Q1xmvYAiB5YpRyVYNqI/cgg4OK7G9vaDaQD3xYkffi
/cjeFVo4Nw==
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----The server is configured using environment variables and supports loading a .env file with environment variables; see godotenv.
This is an example .env with comments:
# This should be a base64-encoded 32 byte random value. It is used to MAC the authentication tokens used between the service and clients.
AUTH_TOKEN_MAC_KEY=
# Base64 PKCS8 encoded private key used to sign the JWT-SVIDs
JWT_SIGNING_KEY=
# Base64 DER encoded X.509 CA certificate used as the root CA for X509-SVIDs
CA_CERTIFICATE=
# Base64 PKCS8 encoded private key of the CA certificate above
CA_PRIVATE_KEY=
# The URL of your service. This is used to build the redirect URL with the OIDC service provider
SERVICE_URL=https://spiffe-user-demo.fly.dev
# The OIDC service provider to use.
OIDC_PROVIDER_URL=https://accounts.google.com
# The OIDC client id and secret
OIDC_CLIENT_ID=
OIDC_CLIENT_SECRET=
# The trust domain that will be used to build the SPIFFE IDs returned by the server
TRUST_DOMAIN=spiffe-user-demo.fly.dev