Swift SecCodeCopySigningInformation生成奇怪的错误

我有一些代码可以检查macOS上的代码签名：

// Get a code reference.
var codeOpt: SecCode? = nil
var err = SecCodeCopyGuestWithAttributes(nil, [kSecGuestAttributeAudit : sourceAppAuditToken] as NSDictionary, [], &codeOpt)
guard err == errSecSuccess, let code = codeOpt else {
    return nil
}

// Convert that to a static code.
var staticCodeOpt: SecStaticCode? = nil
err = SecCodeCopyStaticCode(code, [] , &staticCodeOpt)
guard err == errSecSuccess, let staticCode = staticCodeOpt else {
    return nil
}

// Get code signing information about that.
var infoOpt: CFDictionary? = nil
// this generates MacOS error: -25337 and CSSM Exception: -2147414013 CSSMERR_DL_MDS_ERROR
err = SecCodeCopySigningInformation(staticCode, SecCSFlags(rawValue: kSecCSInternalInformation ), &infoOpt) 
guard err == errSecSuccess, let info = infoOpt as? [String:Any] else {
    return nil
}

调用

SecCodeCopySigningInformation

会在系统日志上生成以下错误：

MacOS错误：-25337

CSSM异常：-2147414013 CSSMERR\U DL\U MDS\U错误

---

有人知道为什么会有这些错误吗？据我所知，我的代码是正确的。

在调用SecCodeCopySigningInformation之前，您应该再次创建静态代码，例如

NSURL               *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] bundlePath]];
CFURLRef            path = (__bridge CFURLRef)url;

SecStaticCodeRef    codeRef;
SecStaticCodeCreateWithPath(path, kSecCSDefaultFlags, &codeRef);

也可以使用这些标志

SecCSFlags      flags = kSecCSInternalInformation;
CFDictionaryRef signingInfo = nil;
OSStatus        status = SecCodeCopySigningInformation(codeRef, flags, &signingInfo);