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package sarama
import (
krb5client "github.com/jcmturner/gokrb5/v8/client"
krb5config "github.com/jcmturner/gokrb5/v8/config"
"github.com/jcmturner/gokrb5/v8/credentials"
"github.com/jcmturner/gokrb5/v8/keytab"
"github.com/jcmturner/gokrb5/v8/types"
)
type KerberosGoKrb5Client struct {
krb5client.Client
}
func (c *KerberosGoKrb5Client) Domain() string {
return c.Credentials.Domain()
}
func (c *KerberosGoKrb5Client) CName() types.PrincipalName {
return c.Credentials.CName()
}
// NewKerberosClient creates kerberos client used to obtain TGT and TGS tokens.
// It uses pure go Kerberos 5 solution (RFC-4121 and RFC-4120).
// uses gokrb5 library underlying which is a pure go kerberos client with some GSS-API capabilities.
func NewKerberosClient(config *GSSAPIConfig) (KerberosClient, error) {
cfg, err := krb5config.Load(config.KerberosConfigPath)
if err != nil {
return nil, err
}
return createClient(config, cfg)
}
func createClient(config *GSSAPIConfig, cfg *krb5config.Config) (KerberosClient, error) {
var client *krb5client.Client
switch config.AuthType {
case KRB5_KEYTAB_AUTH:
kt, err := keytab.Load(config.KeyTabPath)
if err != nil {
return nil, err
}
client = krb5client.NewWithKeytab(config.Username, config.Realm, kt, cfg, krb5client.DisablePAFXFAST(config.DisablePAFXFAST))
case KRB5_CCACHE_AUTH:
cc, err := credentials.LoadCCache(config.CCachePath)
if err != nil {
return nil, err
}
client, err = krb5client.NewFromCCache(cc, cfg, krb5client.DisablePAFXFAST(config.DisablePAFXFAST))
if err != nil {
return nil, err
}
default:
client = krb5client.NewWithPassword(config.Username,
config.Realm, config.Password, cfg, krb5client.DisablePAFXFAST(config.DisablePAFXFAST))
}
return &KerberosGoKrb5Client{*client}, nil
}
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