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fix: cert chain sorting when the leaf certificate is missing the Subj…
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…ectKeyIdentifier extension (Azure#1509)

Co-authored-by: Chris Curwick <[email protected]>
Co-authored-by: Anish Ramasekar <[email protected]>
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@Cisien @chriscur @aramase
3 people authored Apr 17, 2024
1 parent 127a096 commit ea0d64d
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Showing 2 changed files with 252 additions and 0 deletions.
6 changes: 6 additions & 0 deletions pkg/provider/provider.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -700,6 +700,12 @@ func fetchCertChains(data []byte) ([]byte, error) {
if i == j {
continue
}

// a leaf cert SubjectKeyId is optional per RFC3280
if nodes[i].cert.AuthorityKeyId == nil && nodes[j].cert.SubjectKeyId == nil {
continue
}

// if ith node AuthorityKeyId is same as jth node SubjectKeyId, jth node was used
// to sign the ith certificate
if string(nodes[i].cert.AuthorityKeyId) == string(nodes[j].cert.SubjectKeyId) {
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246 changes: 246 additions & 0 deletions pkg/provider/provider_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -794,6 +794,252 @@ fpTPteqfpl8iGQIhAOo8tpUYiREVSYZu130fN0Gvy4WmJMFAi7JrVeSnZ7uP
}
}

func TestFetchCertChainWithLeafMissingSKI(t *testing.T) {
rootCACert := `
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`

intermediateCert1 := `
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`

intermediateCert2 := `
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`

serverCert := `
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`

expectedCertChain := `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`

cases := []struct {
desc string
cert string
expectedErr bool
}{
{
desc: "order: root, intermediate1, intermediate2, server certs",
cert: rootCACert + intermediateCert1 + intermediateCert2 + serverCert,
expectedErr: false,
},
{
desc: "order: root, server, intermediate1, intermediate2, certs",
cert: rootCACert + serverCert + intermediateCert1 + intermediateCert2,
expectedErr: false,
},
{
desc: "order: intermediate1, intermediate2, root, server certs",
cert: intermediateCert1 + intermediateCert2 + rootCACert + serverCert,
expectedErr: false,
},
{
desc: "order: intermediate1, intermediate2, server, root certs",
cert: intermediateCert1 + intermediateCert2 + serverCert + rootCACert,
expectedErr: false,
},
{
desc: "order: server, root, intermediate1, intermediate2 certs",
cert: serverCert + rootCACert + intermediateCert1 + intermediateCert2,
expectedErr: false,
},
{
desc: "order: server, intermediate1, intermediate2, root certs",
cert: serverCert + intermediateCert1 + intermediateCert2 + rootCACert,
expectedErr: false,
},

{
desc: "order: root, intermediate2, intermediate1, server certs",
cert: rootCACert + intermediateCert1 + intermediateCert2 + serverCert,
expectedErr: false,
},
{
desc: "order: root, server, intermediate2, intermediate1 certs",
cert: rootCACert + serverCert + intermediateCert1 + intermediateCert2,
expectedErr: false,
},
{
desc: "order: intermediate2, intermediate1, root, server certs",
cert: intermediateCert1 + intermediateCert2 + rootCACert + serverCert,
expectedErr: false,
},
{
desc: "order: intermediate2, intermediate1, server, root certs",
cert: intermediateCert1 + intermediateCert2 + serverCert + rootCACert,
expectedErr: false,
},
{
desc: "order: server, root, intermediate2, intermediate1 certs",
cert: serverCert + rootCACert + intermediateCert1 + intermediateCert2,
expectedErr: false,
},
{
desc: "order: server, intermediate2, intermediate1, root certs",
cert: serverCert + intermediateCert1 + intermediateCert2 + rootCACert,
expectedErr: false,
},
}

for _, tc := range cases {
t.Run(tc.desc, func(t *testing.T) {
certChain, err := fetchCertChains([]byte(tc.cert))
if tc.expectedErr && err == nil || !tc.expectedErr && err != nil {
t.Fatalf("expected error: %v, got error: %v", tc.expectedErr, err)
}
if string(certChain) != expectedCertChain {
t.Fatalf(cmp.Diff(expectedCertChain, string(certChain)))
}
})
}
}

func TestFetchCertChainWarning(t *testing.T) {
rootCACert := `
-----BEGIN CERTIFICATE-----
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