secretive/SecretAgentKit/SigningRequestTracer.swift

61 lines
2.6 KiB
Swift

import Foundation
import AppKit
import Security
import SecretKit
struct SigningRequestTracer {
}
extension SigningRequestTracer {
func provenance(from fileHandleReader: FileHandleReader) -> SigningRequestProvenance {
let firstInfo = process(from: fileHandleReader.pidOfConnectedProcess)
var provenance = SigningRequestProvenance(root: firstInfo)
while NSRunningApplication(processIdentifier: provenance.origin.pid) == nil && provenance.origin.parentPID != nil {
provenance.chain.append(process(from: provenance.origin.parentPID!))
}
return provenance
}
func pidAndNameInfo(from pid: Int32) -> kinfo_proc {
var len = MemoryLayout<kinfo_proc>.size
let infoPointer = UnsafeMutableRawPointer.allocate(byteCount: len, alignment: 1)
var name: [Int32] = [CTL_KERN, KERN_PROC, KERN_PROC_PID, pid]
sysctl(&name, UInt32(name.count), infoPointer, &len, nil, 0)
return infoPointer.load(as: kinfo_proc.self)
}
func process(from pid: Int32) -> SigningRequestProvenance.Process {
var pidAndNameInfo = self.pidAndNameInfo(from: pid)
let ppid = pidAndNameInfo.kp_eproc.e_ppid != 0 ? pidAndNameInfo.kp_eproc.e_ppid : nil
let procName = String(cString: &pidAndNameInfo.kp_proc.p_comm.0)
let pathPointer = UnsafeMutablePointer<UInt8>.allocate(capacity: Int(MAXPATHLEN))
_ = proc_pidpath(pid, pathPointer, UInt32(MAXPATHLEN))
let path = String(cString: pathPointer)
var secCode: Unmanaged<SecCode>!
let flags: SecCSFlags = [.considerExpiration, .enforceRevocationChecks]
SecCodeCreateWithPID(pid, SecCSFlags(), &secCode)
let valid = SecCodeCheckValidity(secCode.takeRetainedValue(), flags, nil) == errSecSuccess
return SigningRequestProvenance.Process(pid: pid, processName: procName, appName: appName(for: pid), iconURL: iconURL(for: pid), path: path, validSignature: valid, parentPID: ppid)
}
func iconURL(for pid: Int32) -> URL? {
do {
if let app = NSRunningApplication(processIdentifier: pid), let icon = app.icon?.tiffRepresentation {
let temporaryURL = URL(fileURLWithPath: (NSTemporaryDirectory() as NSString).appendingPathComponent("\(UUID().uuidString).png"))
let bitmap = NSBitmapImageRep(data: icon)
try bitmap?.representation(using: .png, properties: [:])?.write(to: temporaryURL)
return temporaryURL
}
} catch {
}
return nil
}
func appName(for pid: Int32) -> String? {
NSRunningApplication(processIdentifier: pid)?.localizedName
}
}