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kms: use GetClientCertificate callback for KES API keys (#19921)

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This commit fixes an issue in the KES client configuration
that can cause the following error when connecting to KES:
```
ERROR Failed to connect to KMS: failed to generate data key with KMS key: tls: client certificate is required
```

The Go TLS stack seems to not send a client certificate if it
thinks the client certificate cannot be validated by the peer.
In case of an API key, we don't care about this since we use
public key pinning and the X.509 certificate is just a transport
encoding.

The `GetClientCertificate` seems to be honored always such that
this error does not occur.

Signed-off-by: Andreas Auernhammer <github@aead.dev>
This commit is contained in:
Andreas Auernhammer 2024-06-12 16:31:26 +02:00 committed by GitHub
parent e3ac4035b9
commit 7ce28c3b1d
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1 changed files with 1 additions and 1 deletions
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2
internal/kms/config.go
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@ -168,7 +168,7 @@ func Connect(ctx context.Context, opts *ConnectionOptions) (*KMS, error) {
if err != nil {
return nil, err
}
conf.Certificates = append(conf.Certificates, cert)
conf.GetClientCertificate = func(*tls.CertificateRequestInfo) (*tls.Certificate, error) { return &cert, nil }
} else {
loadX509KeyPair := func(certFile, keyFile string) (tls.Certificate, error) {
// Manually load the certificate and private key into memory.