What is the serial number of a certificate?
A serial number. This is a unique identifier assigned by the CA which issued the certificate. The serial number is unique within the CA which issued the certificate: no two certificates signed by the same CA certificate have the same serial number.
How do I find my SSL serial number?
K90546091: How to retrieve a SSL certificate serial number from the CLI
- Description.
- # tmsh list sys file ssl-cert serial-number. So assuming the name of the cert was test then you could run the below command:
- # tmsh list sys file ssl-cert test.crt serial-number. sys file ssl-cert test.crt {
Is the serial number a unique key for X509 certificate?
The serial number is an integer assigned by the CA to each certificate. It MUST be unique for each certificate issued by a given CA (i.e., the issuer name and serial number identify a unique certificate). TL;DR: You must use a composite key of issuer name + serial number.
How are serial numbers chosen in a certificate?
2 Answers 2. In a certificate, the serial number is chosen by the CA which issued the certificate. It is just written in the certificate. The CA can choose the serial number in any way as it sees fit, not necessarily randomly (and it has to fit in 20 bytes). A CA is supposed to choose unique serial numbers, that is, unique for the CA.
What do you need to know about X.509 certificates?
X.509 certificates are digital documents that represent a user, computer, service, or device. They are issued by a certification authority (CA), subordinate CA, or registration authority and contain the public key of the certificate subject.
Can a serial number be used as a unique ID?
Negative serial numbers can also be specified but their use is not recommended. As mentioned in another answer, the serial number must be unique within the CA. So serial number alone can’t be used as a unique ID of the certificate — certificates from different CAs can have the same serial number.