jenkins-shared-library/vars/cosignAttest.groovy

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// Sirf signature ye batata hai ki "image hamne banayi". Provenance attestation
// ye batata hai ki "kaunse commit se, kis machine par, kab, kis pipeline se".
// Audit me yahi sabse pehle poochha jaata hai.
def call(Map info) {
withCredentials([string(credentialsId: 'vault-deployer-token', variable: 'VAULT_TOKEN')]) {
withEnv([
"P_REPO=${info.repo}", "P_COMMIT=${info.commit}",
"P_BUILD=${info.build}", "P_JOB=${info.job}", "P_BUILDER=${info.builder}"
]) {
sh '''
set +x
umask 077
WORK=$(mktemp -d); trap "rm -rf $WORK" EXIT
curl -sf -H "X-Vault-Token: $VAULT_TOKEN" "$VAULT_ADDR/v1/platform/data/cosign" > $WORK/c.json
python3 - "$WORK" <<'PY'
import json, sys, os
w = sys.argv[1]
d = json.load(open(w + '/c.json'))['data']['data']
for k, f in (('private_key', 'cosign.key'), ('password', 'pw')):
open(os.path.join(w, f), 'w').write(d[k])
PY
curl -sf -H "X-Vault-Token: $VAULT_TOKEN" "$VAULT_ADDR/v1/$VAULT_MOUNT/data/registry" > $WORK/r.json
python3 - "$WORK" "$REGISTRY" <<'PY'
import base64, json, os, sys
w, reg = sys.argv[1], sys.argv[2]
d = json.load(open(w + '/r.json'))['data']['data']
auth = base64.b64encode(('%s:%s' % (d['username'], d['password'])).encode()).decode()
os.makedirs(os.path.expanduser('~/.docker'), exist_ok=True)
json.dump({'auths': {reg: {'auth': auth}}}, open(os.path.expanduser('~/.docker/config.json'), 'w'))
PY
# SLSA v0.2 predicate - kis source se kaise bani
python3 - "$WORK" <<'PY'
import json, os, sys, datetime
w = sys.argv[1]
pred = {
"builder": {"id": os.environ["P_BUILDER"]},
"buildType": "https://ns31240276.ip-51-195-4.eu/devops-platform/jenkins@v1",
"invocation": {
"configSource": {
"uri": os.environ["P_REPO"],
"digest": {"sha1": os.environ["P_COMMIT"]},
"entryPoint": os.environ["P_JOB"],
},
"environment": {"buildNumber": os.environ["P_BUILD"]},
},
"metadata": {
"buildInvocationId": os.environ["P_BUILD"],
"buildFinishedOn": datetime.datetime.now(datetime.timezone.utc)
.strftime("%Y-%m-%dT%H:%M:%SZ"),
"completeness": {"parameters": True, "environment": False, "materials": True},
"reproducible": False,
},
"materials": [{
"uri": os.environ["P_REPO"],
"digest": {"sha1": os.environ["P_COMMIT"]},
}],
}
open(w + '/predicate.json', 'w').write(json.dumps(pred, indent=2))
PY
COSIGN_PASSWORD=$(cat $WORK/pw) cosign attest \
--key $WORK/cosign.key --yes --tlog-upload=false \
--type slsaprovenance --predicate $WORK/predicate.json \
"$FULL_IMAGE"
rm -f ~/.docker/config.json
echo " provenance attach ho gaya: $FULL_IMAGE"
'''
}
}
}