(Go) Find Certificate by Email Address

See more Cert Store Examples

Demonstrates how to find a certificate having the specified email address either within the cert's subject email, or the RFC822 name.

In an X.509 certificate, an email address can typically be located in two places:

1. RFC822 Name (Subject Alternative Name extension) -
   • The certificate may include an email address in the Subject Alternative Name (SAN) extension under the RFC822 Name field. This is a modern and preferred method because it allows for flexibility and alignment with security best practices.
   • To find it, Chilkat inspects the SAN extension in the certificate details.
2. Subject (Common Name or Email Address attribute) -
   • Older certificates may store the email address directly in the Subject field, typically under the Email Address attribute ("emailAddress") or, less commonly, the Common Name (CN).
   • This method is less preferred in modern standards but can still be encountered in legacy implementations. Chilkat also searches here for the email address.

Note: Requires Chilkat v10.1.2 or later.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    certStore := chilkat.NewCertStore()

    // This opens the Current User certificate store on Windows,
    // On MacOS and iOS it opens the default Keychain.
    readOnly := false
    success := certStore.OpenCurrentUserStore(readOnly)
    if success == false {
        fmt.Println(certStore.LastErrorText())
        certStore.DisposeCertStore()
        return
    }

    // Find the certificate having the specified email address in either the RFC822 Name or in the Subject.
    json := chilkat.NewJsonObject()
    email_address := "joe@example.com"
    json.UpdateString("email",email_address)

    cert := chilkat.NewCert()
    success = certStore.FindCert(json,cert)
    if success == true {
        // Show the full distinguished name of the certificate.
        fmt.Println("Found: ", cert.SubjectDN())
    } else {
        fmt.Println("Not found.")
    }


    certStore.DisposeCertStore()
    json.DisposeJsonObject()
    cert.DisposeCert()