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checkIP

method X509Certificate.prototype.checkIP
Jump to headingX509Certificate.prototype.checkIP(ip: string): string | undefined

Checks whether the certificate matches the given IP address (IPv4 or IPv6).

Only RFC 5280 iPAddress subject alternative names are considered, and they must match the given ip address exactly. Other subject alternative names as well as the subject field of the certificate are ignored.

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Return Type Jump to heading

string | undefined

Returns ip if the certificate matches, undefined if it does not.

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