A certificate used with vRealize Operations Manager must conform to certain requirements. Using a custom certificate is optional and does not affect vRealize Operations Manager features.
Requirements for Custom Certificates
Custom vRealize Operations Manager certificates must meet the following requirements.
The certificate file must include the terminal (leaf) server certificate, a private key, and all issuing certificates if the certificate is signed by a chain of other certificates.
In the file, the leaf certificate must be first in the order of certificates. After the leaf certificate, the order does not matter.
In the file, all certificates and the private key must be in PEM format. vRealize Operations Manager does not support certificates in PFX, PKCS12, PKCS7, or other formats.
In the file, all certificates and the private key must be PEM-encoded. vRealize Operations Manager does not support DER-encoded certificates or private keys.
PEM-encoding is base-64 ASCII and contains legible BEGIN and END markers, while DER is a binary format. Also, file extension might not match encoding. For example, a generic .cer extension might be used with PEM or DER. To verify encoding format, examine a certificate file using a text editor.
The file extension must be .pem.
The private key must be generated by the RSA or DSA algorithm.
The private key must not be encrypted by a pass phrase if you use the master node configuration wizard or the administration interface to upload the certificate.
The REST API in this vRealize Operations Manager release supports private keys that are encrypted by a pass phrase. Contact VMware Technical Support for details.
The vRealize Operations Manager Web server on all nodes will have the same certificate file, so it must be valid for all nodes. One way to make the certificate valid for multiple addresses is with multiple Subject Alternative Name (SAN) entries.
SHA1 certificates creates browser compatibility issues. Therefore, ensure that all certificates that are created and being uploaded to vRealize Operations Manager are signed using SHA2 or newer.
The vRealize Operations Manager supports custom security certificates with key length up to 8192 bits. An error is displayed when you try to upload a security certificate generated with a stronger key length beyond 8192 bits.