SerialNumber

A number that uniquely identifies a certificate issued by a specific certificate authority.

CertificateSerialNumber.swift:26
iOS
13+
macOS
10.15+
tvOS
13+
watchOS
6+
struct SerialNumber

Serial numbers are often extremely large (up to 20 bytes), so they cannot typically be represented using a fixed-width integer type. This type therefore represents the raw big-endian bytes of the serial number, suitable for loading into a more specific type.