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x509-chain-regex-examples.md 1.27 KB

Examples of RegEx usage

The regular expression is required to extract device name from the X509 certificate's common name. The regular expression syntax is based on Java Pattern. You may also use this resource to test your expressions but make sure you select Java 8 flavor.

  • Pattern:(.).company.com- matches any characters before the ".company.com".
    CN sample:DeviceA.company.com
    Result:*DeviceA

  • Pattern: (.)@company.com- matches any characters before the "@company.com".
    CN sample:DeviceA@company.com
    Result:*DeviceA

  • Pattern: prefix(.)suffix@company.com- matches characters between "prefix" and "suffix@company.com".
    CN sample:prefixDeviceAsuffix@company.com
    Pattern matches:* DeviceA

  • Pattern: \D+\.(.)\.\d+@company.com- matches characters between not digits prefix followed by period and sequence of digits with "@company.com" ending.
    CN sample:region.DeviceA.220423@company.com
    Pattern matches:* DeviceA