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69 lines
1.7 KiB
69 lines
1.7 KiB
package cert
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import (
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"crypto/tls"
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"crypto/x509"
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"encoding/pem"
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"time"
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)
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// Artifacts hosts a private key, its corresponding serving certificate and
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// the CA certificate that signs the serving certificate.
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type Artifacts struct {
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// PEM encoded private key
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Key []byte
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// PEM encoded serving certificate
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Cert []byte
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// PEM encoded CA private key
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CAKey []byte
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// PEM encoded CA certificate
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CACert []byte
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// Resource version of the certs
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ResourceVersion string
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}
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// CertGenerator is an interface to provision the serving certificate.
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type CertGenerator interface {
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// Generate returns a Artifacts struct.
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Generate(CommonName string) (*Artifacts, error)
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// SetCA sets the PEM-encoded CA private key and CA cert for signing the generated serving cert.
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SetCA(caKey, caCert []byte)
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}
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// ValidCACert think cert and key are valid if they meet the following requirements:
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// - key and cert are valid pair
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// - caCert is the root ca of cert
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// - cert is for dnsName
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// - cert won't expire before time
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func ValidCACert(key, cert, caCert []byte, dnsName string, time time.Time) bool {
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if len(key) == 0 || len(cert) == 0 || len(caCert) == 0 {
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return false
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}
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// Verify key and cert are valid pair
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_, err := tls.X509KeyPair(cert, key)
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if err != nil {
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return false
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}
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// Verify cert is valid for at least 1 year.
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pool := x509.NewCertPool()
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if !pool.AppendCertsFromPEM(caCert) {
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return false
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}
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block, _ := pem.Decode(cert)
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if block == nil {
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return false
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}
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c, err := x509.ParseCertificate(block.Bytes)
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if err != nil {
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return false
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}
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ops := x509.VerifyOptions{
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DNSName: dnsName,
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Roots: pool,
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CurrentTime: time,
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}
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_, err = c.Verify(ops)
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return err == nil
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}
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