The X509 tool facilitates the inspection and analysis of X.509 digital certificates, allowing users to examine key details such as certificate validity, issuer information, subject details, cryptographic algorithms, and other critical attributes, aiding in the assessment of certificate authenticity and security compliance.
The entity (such as a person, organization, or device) to which the certificate is issued.
The entity that issues the certificate, usually a certificate authority (CA).
The period during which the certificate is considered valid, typically specified by a start and end date.
The cryptographic key used for encryption, digital signatures, or key exchange.
Specifies the purposes for which the public key can be used (e.g., encryption, digital signature, key agreement).
Subject Alternative Name (SAN) is an extension that allows additional identities (such as domain names or IP addresses) to be associated with the subject of the certificate.
Certificate Revocation List (CRL) is a list maintained by the CA that contains the serial numbers of revoked certificates.
Authority Key Identifier (AKI) is a unique identifier that helps locate the public key corresponding to the CA that issued the certificate.
Subject Key Identifier (SKI) is a unique identifier that helps identify the public key corresponding to the subject of the certificate.