RouterOS/RouterOSAssistant/Core/Networking/CertificateFingerprint.swift

import Foundation
import Security
import CryptoKit

enum CertificateFingerprint {
    static func sha256(of trust: SecTrust) -> String {
        guard
            let chain = SecTrustCopyCertificateChain(trust) as? [SecCertificate],
            let leaf = chain.first
        else {
            return "unbekannt"
        }
        let data = SecCertificateCopyData(leaf) as Data
        let digest = SHA256.hash(data: data)
        return digest.map { String(format: "%02X", $0) }.joined(separator: ":")
    }
}