X.509 Extensions. Certificate extensions were introduced in version 3 of the X.509 standard for certificates. These v3 extensions allow certificates to be customized to applications by supporting the addition of arbitrary fields in the certificate. X.509 v3 extensions provide for the association of additional attributes with users or public keys.
Standard X.509 v3 Certificate Extension Reference. An X.509 v3 certificate contains an extension field that permits any number of additional fields to be added to the certificate. Certificate extensions provide a way of adding information such as alternative subject names and usage restrictions to certificates.
X509 V3 certificate extension configuration format . openssl information DESCRIPTION. Several of the OpenSSL utilities can add extensions to a certificate or certificate request based on the contents of a configuration file. Typically the application will contain an option to point to an extension section. …
Certificate signing requests for X.509 certificates typically contain standard certificate extensions that specify critical key usage statements and intended deployments of a certificate . Additionally, customized extensions can be provided for client applications to use as they see fit.
B.3. Standard X.509 v3 Certificate Extension Reference Red Hat …
SSL Certificates – Standards, Formats and file extensions – pem cer crt pfx, B.3. Standard X.509 v3 Certificate Extension Reference Red Hat …
SSL Certificates – Standards, Formats and file extensions – pem cer crt pfx
