rob05c commented on a change in pull request #6522:
URL: https://github.com/apache/trafficcontrol/pull/6522#discussion_r809491124



##########
File path: cache-config/t3c-generate/cfgfile/sslkeys.go
##########
@@ -59,24 +61,39 @@ func GetSSLCertsAndKeyFiles(toData *t3cutil.ConfigData) 
([]t3cutil.ATSConfigFile
                        key = append(key, '\n') // it's going to be a file, 
needs a trailing newline to be POSIX-compliant.
                }
 
+               var keyPairErr []string
+               pairErr := CheckKeyPair(key, cert, string(dsName))
+               if pairErr != nil {
+                       keyPairErr = append(keyPairErr, pairErr.Error())
+               }
+
                certName, keyName := 
atscfg.GetSSLMultiCertDotConfigCertAndKeyName(dsName, ds)
 
                keyFile := t3cutil.ATSConfigFile{}
                keyFile.Name = keyName
                keyFile.Path = "/opt/trafficserver/etc/trafficserver/ssl/" // 
TODO read config, don't hard code
                keyFile.Text = string(key)
                keyFile.Secure = true
-               keyFile.Warnings = dsWarns
+               keyFile.Warnings = keyPairErr
                configs = append(configs, keyFile)
 
                certFile := t3cutil.ATSConfigFile{}
                certFile.Name = certName
                certFile.Path = "/opt/trafficserver/etc/trafficserver/ssl/" // 
TODO read config, don't hard code
                certFile.Text = string(cert)
                certFile.Secure = true
-               certFile.Warnings = dsWarns
+               certFile.Warnings = keyPairErr
                configs = append(configs, certFile)
        }
 
        return configs, nil
 }
+
+func CheckKeyPair(keyPem []byte, certPem []byte, ds string) error {
+       _, err := tls.X509KeyPair(certPem, keyPem)
+       if err != nil {
+               log.Warnf("Issue with keypair for %s: %s", ds, err)

Review comment:
       It's uncommon to both log and return an error/warning. Doesn't this 
cause it to print twice?




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