64 lines
1.8 KiB
Go
64 lines
1.8 KiB
Go
package ca
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import (
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"crypto/tls"
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"crypto/x509"
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)
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// TLSOption defines the type of a function that modifies a tls.Config.
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type TLSOption func(c *tls.Config) error
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// setTLSOptions takes one or more option function and applies them in order to
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// a tls.Config.
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func setTLSOptions(c *tls.Config, options []TLSOption) error {
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for _, opt := range options {
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if err := opt(c); err != nil {
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return err
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}
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}
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return nil
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}
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// RequireAndVerifyClientCert is a tls.Config option used on servers to enforce
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// a valid TLS client certificate. This is the default option for mTLS servers.
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func RequireAndVerifyClientCert() TLSOption {
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return func(c *tls.Config) error {
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c.ClientAuth = tls.RequireAndVerifyClientCert
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return nil
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}
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}
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// VerifyClientCertIfGiven is a tls.Config option used on on servers to validate
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// a TLS client certificate if it is provided. It does not requires a certificate.
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func VerifyClientCertIfGiven() TLSOption {
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return func(c *tls.Config) error {
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c.ClientAuth = tls.VerifyClientCertIfGiven
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return nil
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}
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}
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// AddRootCA adds to the tls.Config RootCAs the given certificate. RootCAs
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// defines the set of root certificate authorities that clients use when
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// verifying server certificates.
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func AddRootCA(cert *x509.Certificate) TLSOption {
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return func(c *tls.Config) error {
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if c.RootCAs == nil {
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c.RootCAs = x509.NewCertPool()
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}
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c.RootCAs.AddCert(cert)
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return nil
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}
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}
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// AddClientCA adds to the tls.Config ClientCAs the given certificate. ClientCAs
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// defines the set of root certificate authorities that servers use if required
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// to verify a client certificate by the policy in ClientAuth.
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func AddClientCA(cert *x509.Certificate) TLSOption {
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return func(c *tls.Config) error {
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if c.ClientCAs == nil {
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c.ClientCAs = x509.NewCertPool()
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}
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c.ClientCAs.AddCert(cert)
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return nil
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}
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}
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