1. An Nginx-formatted certificate (public key PEM and private key) is required.
2. Public key PEM, commencing with -----BEGIN CERTIFICATE----- and concluding with -----END CERTIFICATE-----, may contain multiple content blocks.
Example:
-----BEGIN CERTIFICATE-----
MIIGfDCCBWSgAwIBAgIQDqKNg12K4t68be6UK3Hp3jANBgkqhkiG9w0BAQsFADBc
...
ZAUz9mof5ZFgJX3afEXUWhwn4eT5frVBbreSMqzu+BY=
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIEiTCCA3GgAwIBAgIQAlqK7xlvfg1sIQSyGuZwKzANBgkqhkiG9w0BAQsFADBh
...
U1P8Xh1CDguM+ZEoew==
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh
...
CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
-----END CERTIFICATE-----
3. Private key, requiring an RSA key, commencing with -----BEGIN RSA PRIVATE KEY----- and concluding with -----END RSA PRIVATE KEY-----.
Example:
-----BEGIN RSA PRIVATE KEY-----
MIIEogIBAAKCAQEAo8KZoz/p0rZ01xJjTMbsT9ff0Yfe/gf4xQZYCYvR1mUgnCNs
...
9/jozuF4pwg5egwwTJqdGt/u0RqS153oCZyK7AyiBKFTTM0S2Vg=
-----END RSA PRIVATE KEY-----
The online certificate conversion tool may be used to convert it into the required format.