SPIFFE and SPIRE

Workloads authenticate with the SPIFFE ID their SPIRE agent attests.

Identity proof

The token has to come from https://oidc-discovery.acme.com, and its sub claim has to match the workload you named. We compare that claim byte for byte, with no wildcards.

Every token also has to name your workspace as its audience. Ask for this audience and no other. A token requested for two audiences fails every exchange.

Console fields

The console also asks which project and environment this identity reaches and which role it gets, with the credential lifetime behind Advanced.

Trust

Built from the example answers above:

We name the identity for you, so the form never asks for one.

Console snippet

# Ask for this audience and no other. A token requested for two audiences fails every exchange.
# spire-agent prints a labelled block, so the JWT is the second line
T=$(spire-agent api fetch jwt -audience YOUR_WORKSPACE_ID \
  -spiffeID <the SPIFFE ID above> \
  -socketPath /run/spire/sockets/agent.sock | sed -n '2p' | tr -d '[:space:]')
C=$(T="$T" jq -n '{token:env.T}' | curl -sS "https://penv.cloud/api/v1/auth/oidc" \
  -H 'content-type: application/json' --data-binary @- | jq -r .credential)
PENV_TOKEN="$C" penv pull

The snippet finishes with penv pull, which writes a file. We recommend penv run for a process; penv pull is for a host that needs a file on disk. Connect your CI has the wrapped step.

Related

• Machine identity
• Connect a Platform in the console
• SPIFFE and SPIRE documentation: the subject is the value most often set wrong