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There are several parts to this change: 1. Implement a new `ephemeralca` that just generates an in-memory certificate, 1. Rename `pkg/ca/pkcs11ca` to `pkg/ca/x509ca` since it had nothing `PKCS11` specific (shared with `ephemeralca` logic), 1. Add support for Kubernetes OIDC via Service Account Projected Volumes, 1. Have the KinD e2e test use `ephemeralca` and `cosign sign` an image. I can split some of these pieces apart, but wanted to get this all working end-to-end, since a key goal was enabling e2e testing on KinD. This follows a lot of the ideas from: https://github.com/mattmoor/kind-oidc Related: sigstore#212 Fixes: sigstore#194 Signed-off-by: Matt Moore <mattomata@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| # Copyright 2021 The Sigstore Authors | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
|
|
||
| url: https://kubernetes.default.svc | ||
| contact: mattmoor@chainguard.dev | ||
| description: "service account projected volumes" | ||
| type: "kubernetes" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| // Copyright 2021 The Sigstore Authors. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
|
|
||
| package api | ||
|
|
||
| import ( | ||
| "context" | ||
| "crypto/x509" | ||
| "encoding/pem" | ||
|
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| "github.com/sigstore/fulcio/pkg/ca/ephemeralca" | ||
| "github.com/sigstore/fulcio/pkg/ca/x509ca" | ||
| "github.com/sigstore/fulcio/pkg/challenges" | ||
| ) | ||
|
|
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| func EphemeralCASigningCertHandler(ctx context.Context, subj *challenges.ChallengeResult, publicKey []byte) (string, []string, error) { | ||
| rootCA, privKey := ephemeralca.CA() | ||
|
|
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| pkixPubKey, err := x509.ParsePKIXPublicKey(publicKey) | ||
| if err != nil { | ||
| return "", nil, err | ||
| } | ||
|
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| clientCert, _, err := x509ca.CreateClientCertificate(rootCA, subj, pkixPubKey, privKey) | ||
| if err != nil { | ||
| return "", nil, err | ||
| } | ||
|
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| // Format in PEM | ||
| rootPEM := pem.EncodeToMemory(&pem.Block{ | ||
| Type: "CERTIFICATE", | ||
| Bytes: rootCA.Raw, | ||
| }) | ||
|
|
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| return clientCert, []string{string(rootPEM)}, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| // Copyright 2021 The Sigstore Authors. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
|
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| package ephemeralca | ||
|
|
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| import ( | ||
| "context" | ||
| "crypto/ecdsa" | ||
| "crypto/elliptic" | ||
| "crypto/rand" | ||
| "crypto/x509" | ||
| "crypto/x509/pkix" | ||
| "math" | ||
| "math/big" | ||
| "time" | ||
| ) | ||
|
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| var ( | ||
| ca *x509.Certificate | ||
| privKey interface{} | ||
| ) | ||
|
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| func Initialize(context.Context) error { | ||
| priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| privKey = priv | ||
|
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| // TODO: We could make it so this could be passed in by the user | ||
| serialNumber, err := rand.Int(rand.Reader, new(big.Int).SetInt64(math.MaxInt64)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| rootCA := &x509.Certificate{ | ||
| SerialNumber: serialNumber, | ||
| Subject: pkix.Name{ | ||
| Organization: []string{"sigstore"}, | ||
| Country: []string{"USA"}, | ||
| Province: []string{"WA"}, | ||
| Locality: []string{"Kirkland"}, | ||
| StreetAddress: []string{"767 6th St S"}, | ||
| PostalCode: []string{"98033"}, | ||
| }, | ||
| NotBefore: time.Now(), | ||
| NotAfter: time.Now().AddDate(10, 0, 0), | ||
| IsCA: true, | ||
| KeyUsage: x509.KeyUsageCertSign | x509.KeyUsageCRLSign, | ||
| BasicConstraintsValid: true, MaxPathLen: 1, | ||
| } | ||
|
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| caBytes, err := x509.CreateCertificate(rand.Reader, rootCA, rootCA, priv.Public(), priv) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| ca, err = x509.ParseCertificate(caBytes) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func CA() (*x509.Certificate, interface{}) { | ||
| return ca, privKey | ||
| } |
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