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Adding client cert common name(s) to the auth failure log #188

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Adding client cert common name(s) to the auth failure log #188

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dbe49a9
Added client cert CNs to the auth failure log.
mramezani95 May 29, 2026
9a13145
Adding quotes around client cert CNs and escaping special characters.
mramezani95 May 29, 2026
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8 changes: 7 additions & 1 deletion go-server-server/go/auth.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import (
"log"
"net/http"
"strings"
"strconv"
)

func CommonNameMatch(r *http.Request) bool {
Expand Down Expand Up @@ -42,6 +43,11 @@ func CommonNameMatch(r *http.Request) bool {
}
}

log.Printf("error: Authentication Fail! None of the common names in the client cert match any of the trusted common names")
commonNames := make([]string, 0)
for _, peercert := range r.TLS.PeerCertificates {
commonNames = append(commonNames, strconv.Quote(peercert.Subject.CommonName))
}
log.Printf("error: Authentication Failed! None of the common names in the client cert chain" +
" matched any of the trusted common names. Client cert common names: %v", commonNames)
return false;
}
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