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fphammerle
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container-image-sigstore
spegling av https://github.com/fphammerle/container-image-sigstore
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README.md

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Personal Container Image Signature Store

Setup

  1. configure signature store location in /etc/containers/registries.d/fphammerle.yaml:

    docker:
docker.io/fphammerle:
sigstore: https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/docker.io
quay.io/fphammerle:
sigstore: https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io

  2. download key

    $ gpg --recv-key 8D2902FE7DF47DDEDA2802F9456B9A0399A5DA2F
$ gpg --export --armor --output /some/where/pgp/fphammerle 8D2902FE7DF47DDEDA2802F9456B9A0399A5DA2F

  3. enable verification in policy.json:

    {
"default": [
{
  "type": "reject"
}
],
"transports": {
"docker": {
  "docker.io/fphammerle": [
    {
      "type": "signedBy",
      "keyType": "GPGKeys",
      "keyPath": "/some/where/pgp/fphammerle",
      "signedIdentity": {"type": "matchRepoDigestOrExact"}
    }
  ],
  "quay.io/fphammerle": [
    {
      "type": "signedBy",
      "keyType": "GPGKeys",
      "keyPath": "/some/where/pgp/fphammerle",
      "signedIdentity": {"type": "matchRepoDigestOrExact"}
    }
  ]
}
}
}

Verify with Podman

$ podman image trust show
default               reject
docker.io/fphammerle  signedBy  fabian@hammerle.me  https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/docker.io
quay.io/fphammerle    signedBy  fabian@hammerle.me  https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io
$ podman --log-level debug run --rm quay.io/fphammerle/systemctl-mqtt:0.5.0-amd64
[...]
DEBU[0000] Using registries.d directory /etc/containers/registries.d for sigstore configuration
DEBU[0000]  Using "docker" namespace quay.io/fphammerle
DEBU[0000]   Using https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io
[...]
DEBU[0002] GET https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io/fphammerle/systemctl-mqtt@sha256=34dcb878dbd66315de6fbf97ceb29e8fec549b7269c6c828c4c889a54a091f14/signature-1
DEBU[0002] GET https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io/fphammerle/systemctl-mqtt@sha256=34dcb878dbd66315de6fbf97ceb29e8fec549b7269c6c828c4c889a54a091f14/signature-2
DEBU[0002]  Requirement 0: allowed
DEBU[0002] Overall: allowed
[...]
DEBU[0004] Starting container 4e46cbe4e982ee84bcff54092146fb0442bb346e451cfb14e2e7f491bc886b88 with command [tini -- systemctl-mqtt --help]
[...]
$ podman --log-level debug run --rm quay.io/fphammerle/systemctl-mqtt:0.5.0-amd64-unsigned
[...]
DEBU[0000] Using registries.d directory /etc/containers/registries.d for sigstore configuration
DEBU[0000]  Using "docker" namespace quay.io/fphammerle
DEBU[0000]   Using https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io
[...]
DEBU[0002] GET https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io/fphammerle/systemctl-mqtt@sha256=34dcb878dbd66315de6fbf97ceb29e8fec549b7269c6c828c4c889a54a091f14/signature-1
DEBU[0002] GET https://raw.githubusercontent.com/fphammerle/container-image-sigstore/master/quay.io/fphammerle/systemctl-mqtt@sha256=34dcb878dbd66315de6fbf97ceb29e8fec549b7269c6c828c4c889a54a091f14/signature-2
DEBU[0002] Requirement 0: denied, done
DEBU[0002] Error pulling image ref //quay.io/fphammerle/systemctl-mqtt:0.5.0-amd64-unsigned: Source image rejected: Signature for identity quay.io/fphammerle/systemctl-mqtt:0.5.0-amd64 is not accepted
  Signature for identity quay.io/fphammerle/systemctl-mqtt:0.5.0-amd64 is not accepted
Error: unable to pull quay.io/fphammerle/systemctl-mqtt:0.5.0-amd64-unsigned: Source image rejected: Signature for identity quay.io/fphammerle/systemctl-mqtt:0.5.0-amd64 is not accepted

References