ne_ssl_cert_identity
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## Name

ne_ssl_cert_identity, ne_ssl_cert_signedby, ne_ssl_cert_issuer, ne_ssl_cert_subject — functions to access certificate properties

## Synopsis

    #include <ne_ssl.h>

`const char *ne_ssl_cert_identity(` | const ne_ssl_certificate *cert`)`;

`const ne_ssl_certificate *ne_ssl_cert_signedby(` | const ne_ssl_certificate *cert`)`;

`const ne_ssl_dname *ne_ssl_cert_subject(` | const ne_ssl_certificate *cert`)`;

`const ne_ssl_dname *ne_ssl_cert_issuer(` | const ne_ssl_certificate *cert`)`;

## Description

The function `ne_ssl_cert_identity` retrieves the “identity” of a certificate; for an SSL server certificate, this will be the hostname for which the certificate was issued. In PKI parlance, the identity is the common name attribute of the distinguished name of the certificate subject.

The functions `ne_ssl_cert_subject` and `ne_ssl_cert_issuer` can be used to access the objects representing the distinguished name of the subject and of the issuer of a certificate, respectively.

If a certificate object is part of a certificate chain, then `ne_ssl_cert_signedby` can be used to find the certificate which signed a particular certificate. For a self-signed certificate or a certificate for which the full chain is not available, this function will return `NULL`.

## Return value

`ne_ssl_cert_issuer` and `ne_ssl_cert_subject` are guaranteed to never return `NULL`. `ne_ssl_cert_identity` may return `NULL` if the certificate has no specific “identity”. `ne_ssl_cert_signedby` may return `NULL` as covered above.

## Examples

The following function could be used to display information about a given certificate:

    void dump_cert(const ne_ssl_certificate *cert) {
      const char *id = ne_ssl_cert_identity(cert);
      char *dn;

      if (id)
        printf("Certificate was issued for '%s'.\n", id);

      dn = ne_ssl_readable_dname(ne_ssl_cert_subject(cert));
      printf("Subject: %s\n", dn);
      free(dn);

      dn = ne_ssl_readable_dname(ne_ssl_cert_issuer(cert));
      printf("Issuer: %s\n", dn);
      free(dn);
    }

## See also

ne_ssl_cert_cmp, ne_ssl_readable_dname

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