I know this is very basic, but it's driving me up a wall:
peercert is defined as:
peercert(Socket) -> {ok, Cert} | {error, Reason}
Types
Socket = sslsocket()
Cert = binary()
The peer certificate is returned as a DER-encoded binary. The certificate can be decoded with public_key:pkix_decode_cert/2.
Ok, great. sslsocket is defined as -record(sslsocket, {fd = nil, pid = nil})
So I run :
New = #sslsocket{pid = Pid},
io:fwrite("~n~npeercert~p~n~n", [ssl:peercert(New)]).
But I get an error that
no function clause matching ssl:peercert({sslsocket,<0.1277.0>,undefined})
So I run it with Pid as an argument and get a similar error:
no function clause matching ssl:peercert(<0.1277.0>)
I'm totally stumped here. I had it working before, the function says it takes these as arguments...
Thank you for your help in advance!
sslsocket() type is not a record called sslsocket, otherwise it would be written as #sslsocket{}. It's a "black box type" (its real type is an implementation detail), but you can obtain it from function ssl:connect().
Related
I tried updating the proxy settings of my mac. SCDynamicStoreSetValue: returned false, indicating an unsuccessful update. This is the code I use. What is the correct way?
let ds: SCDynamicStoreRef = SCDynamicStoreCreate(nil, "setProxy" as CFString, nil, nil)!
let isUpdated = SCDynamicStoreSetValue(ds, "HTTPProxy" as CFStringRef, "111.111.111.1")
if isUpdated{
print("updated")
}else{
print("not updated")
}
The question is about why SCDynamicStoreSetValue returns false and how to circumvent it.
After SCDynamicStoreSetValue fails, call SCError() to obtain the error code:
let errorCode = SCError()
Or obtain the error as a string with:
let errorString = String.fromCString(SCErrorString(SCError()))
In either case, review the Status and Error Codes for the System Configuration Framework. That should provide you with the reason that SCDynamicStoreSetValue is returning false.
(If your app is Sandboxed, the likely reason is kSCStatusAccessError, or "Permission Denied". Sandboxed apps can't set those values.)
I know this is an old topic, but the third argument of SCDynamicStoreSetValue should be a CFPropertyListRef (in our case a CFString, not a string), as in the docs
In my case this was causing the function call fail.
I have a huge problem to transfer NSAttributtedString in a block callback from XPC service.
I am trying to return basic string as:
NSDictionary *arrayComa = #{NSForegroundColorAttributeName:[NSColor colorWithRGB:0xD35250],
NSFontAttributeName:[NSFont fontWithName:#"Monaco" size:11]};
NSMutableAttributedString *testString = [[NSMutableAttributedString alloc] initWithString:#"{}" attributes:arrayComa];
I have also whitelisted the incoming response as:
let incommingClasses:Set = Set(arrayLiteral: [NSMutableAttributedString.self, NSAttributedString.self, NSColor.self, NSFont.self, NSString.self, ])
connectionService.remoteObjectInterface?.setClasses(incommingClasses, forSelector: attributtedText:withReply:, argumentIndex: 0, ofReply: true)
What ever I do I get Errors:
Exception caught during decoding of received reply to message 'Exception caught during decoding of received reply to message 'attributtedText:withReply':, dropping incoming message and calling failure block.
Exception: Exception while decoding argument 0 (#1 of invocation):
<NSInvocation: 0x6000006649c0>
return value: {v} void
target: {#?} 0x0 (block)
argument 1: {#"NSMutableAttributedString"} 0x0
Exception: value for key '<no key>' was of unexpected class 'NSMutableAttributedString'. Allowed classes are '{(
(
NSMutableAttributedString,
NSAttributedString,
NSColor,
NSFont,
NSString
)
)}'.
Anybody has transferred NSAttributtedText via XPC Service succesfully?
EDIT: I got a reply to my message on devforums, a workaround is to use an NSSet and to cast it as Set when passing to to setClasses(). Another issue is that there already are pre-set classes for all selectors, and therefore you need to add your own to the current ones, rather than set yours only. Here's a working code :
let interface = NSXPCInterface(withProtocol: MyProtocol.self)
let expectedClasses = NSSet.setWithArray([[NSMutableAttributedString.self, NSAttributedString.self, NSColor.self, NSFont.self])
let currentExpectedClasses = interface.classesForSelector("attributtedText:withReply:", argumentIndex: 0, ofReply: false) as NSSet
let allClasses = currentExpectedClasses.setByAddingSet(expectedClasses)
interface.setClasses(allClasses as Set<NSObject>, forSelector: "attributtedText:withReply:", argumentIndex: 0, ofReply: false)
Original answer :
This will only be a partial answer as I haven't found the right way to do this either yet, but
let incommingClasses:Set = Set(arrayLiteral: [NSMutableAttributedString.self, NSAttributedString.self, NSColor.self, NSFont.self, NSString.self, ])
returns a Set<NSArray>, which is not what you want. I assume you added the 'arrayLiteral' argument label because the compiler told you so, however this compiles :
let foo = Set(["string1", "string2"])
and it returns a Set<String>.
The problem is that I couldn't find a way to create a Set of class types. I've asked on Apple's devforums : https://devforums.apple.com/thread/271316 but unless I'm missing something obvious, this looks like an API bug.
I'm trying to set up a simple example using WebSockets in Elm, but I keep getting the run time error "input is undefined". The console does not give me any line number in my elm file or anything like that.
I was trying to use WebSockets in a large project, and I kept getting the error "a is undefined", so I decided to make this small example to try and isolate the problem.
I wrote some code that receives messages containing numbers from the websocket. It increments the numbers, and then sends the new numbers back out over the web socket. The server does the same thing, sending back the number incremented by 1 to the client.
Here is the elm code:
import Graphics.Element (Element)
import Signal
import Signal (Signal)
import Text
import Window
import WebSocket
import String
type State = Num Int
| StateErr String
input : Signal String
input =
WebSocket.connect "ws://localhost:4567/test" sendToServer
sendToServer : Signal String
sendToServer =
Signal.dropRepeats
(Signal.dropIf (\str -> str == "") "" (Signal.map formatReply state))
formatReply : State -> String
formatReply state =
case state of
Num n -> toString n
StateErr str -> ""
stepState : String -> State -> State
stepState str state =
case (String.toInt str) of
Ok n -> Num (n + 1)
Err str -> StateErr str
display : (Int,Int) -> State -> Element
display (w,h) state = Text.asText state
state : Signal State
state =
Signal.foldp stepState (Num 0) input
main : Signal Element
main =
Signal.map2 display Window.dimensions state
I tested the server side, and it's working fine, so I definitely do not think that the server is causing the issue.
When I tried the code in Firefox, I get "input is undefined". When I run it in Chrome, I get "Cannot read property 'kids' of undefined".
In Chrome, upon looking at the stack trace it seems that when the code goes to run, input is undefined. Is this a bug with the WebSocket library?
I'm very new to using Elm, so I'd appreciate any help/advice on using websockets.
I learned that the cause of my troubles, is that as of now the WebSockets library in elm is not fully implemented. I also learned that I can accomplish my goals using ports, and then implementing the websocket in javascript.
I added the following javascript to my html file:
var game = Elm.fullscreen(Elm.SlimeWarz, {rawServerInput: ""});
var socket = new WebSocket("ws://localhost:4567");
socket.onopen = function(){
console.log("Socket has been opened.");
}
socket.onmessage = function(msg){
game.ports.rawServerInput.send(msg.data);
}
game.ports.sendToServer.subscribe(sendOverWebsocket);
function sendOverWebsocket(str) {
socket.send(str);
}
Then in elm, I can send data using a ported Signal called sendtoServer
port sendToServer : Signal String
and I can view all the data I receive through the ported signal rawServerInput
port rawServerInput : Signal String
Answer
I'm going to use part of my answer to this question. I think your solution to use ports and do the websocket part in JavaScript is better than the hack I described in that answer, but you may still want to look at it. Once Elm 0.15 is released this problem should go away entirely because of a language feature and the revamp of Websocket (Http gets revamped too btw).
Context: Reason for error
The reason you get the runtime error is because of a compiler bug. The compiler only generates correct code on recursive functions, while it accepts any recursive value. Notice that your input depends on sendToServer, sendToserver depends on state and sContext: tate depends on input.
Context: Code architecture
Those kinds of cyclic signals are usually a sign of bad program architecture. You can find more on that subject here. But your architecture is not at fault here. The problem lies with the Websocket library which doesn't steer you in the right direction.
I'm trying to obtain a digital signature for a XML string using a RSA private key using Swift as command-line script (to be called from FileMaker later).
The compiler kept crashing with "segmentation fault 11" and then "Illegal Instruction: 4" and I kept drilling down until I (think) I found the problem, but it's completely beyond me, so please, please help!! ;) :)
As the title says, when I invoke SecTransformExecute on my SecSignTransform, with a binary version of my String as input attribute, I get the following error message:
Error Domain=Internal CSSM error Code=-2147415790 "The operation
couldn’t be completed. (Internal CSSM error error -2147415790 -
Internal error #80010912 at __SignTransform_block_invoke_2
/SourceCache/Security/Security-57031.1.35/Security/libsecurity_transform/lib/SecSignVerifyTransform.c:279)" UserInfo=0x7fc620e23aa0 {NSDescription=Internal error #80010912 at
__SignTransform_block_invoke_2 /SourceCache/Security/Security-57031.1.35/Security/libsecurity_transform/lib/SecSignVerifyTransform.c:279,
Originating Transform=CoreFoundationObject}
Here is the relevant part of my code:
import Foundation
import CoreFoundation
import Security
var signer: SecTransformRef
var signedData, digestData: NSData
var error: Unmanaged<CFErrorRef>?
var status: OSStatus
var key: SecKey
var anyItem: Unmanaged<AnyObject>?
var keySearchDict: [String : AnyObject]
let keyMatch = "[*place search tag here*]" as String
// turns a string into a binary to sign
let str = "Hello World"
let uintData = [UInt8](str.utf8)
let sourceData = CFDataCreate(kCFAllocatorDefault, uintData, countElements(uintData))
// sets up keySearchDict to query Keychain
keySearchDict = [(kSecClass as String): (kSecClassKey as String), (kSecMatchSubjectContains as String): keyMatch, (kSecReturnRef as String): kCFBooleanTrue]
// gets private key using keySearchDict
status = SecItemCopyMatching(keySearchDict, &anyItem)
key = (anyItem!.takeRetainedValue() as SecKey)
if status != 0 { println("status is: \(SecCopyErrorMessageString(status, &error).takeRetainedValue())") }
// creates SecTransform object using key
signer = SecSignTransformCreate(key, &error).takeRetainedValue()
if error == nil { println("signer transform creation error == nil") } else { println(error) }
// signer to get data from sourceData
SecTransformSetAttribute(signer, kSecTransformInputAttributeName, sourceData!, &error)
if error == nil { println("signer attribute setting error == nil") } else { println(error) }
// execute the transform
//signedData = (SecTransformExecute(signer, &error) as NSData)
let anything = SecTransformExecute(signer, &error)
if error == nil { println("signer execute error == nil") } else { println("erro: \(error!.takeRetainedValue())"); println(CFErrorGetCode(error!.takeRetainedValue())) }
println("anything = \(anything)")
//println(signedData)
I'm not very familiar with objc and actually not quite a proper coder, so please forgive my poor coding style ;) Also, sorry if I'm posting too much of it, but I figured better more than less...
Maybe I'm doing something wrong when transforming the String to binary for signing? I tried it both using CFData and NSData (to make this self contained, I'm using "Hello World" as my String, but in my code I actually load a UTF8 encoded XML from a file using NSData(contentsOfFile:) yet both generate the same error...)
Thanks you so much for your help! It's being a great learning experience, but I've been at it for over a week full-time now, so I really can use a break!! ;) :D
I have found a solution. The code no longer crashes, and I connected to the web service successfully after it, and the XMLDSIG signature was accepted by it (see related Question on XMLDSIG if interested in details on canonicalization and xml reference).
The key I was using is not compatible with signing (not sure why or even what the key was, actually...)
I was looking into counter-authenticating with a server using a X509 certificate (for an unrelated part of my solution) when I came across the SecIdentity class, needed to create a SecCredential together with the certificate and authenticate with the server.
I saw Identities embed a private key, and thought if could work for me. And it did!
Here are the changes I made:
Changed the kSecClass to kSecClassIdentity in the search dictionary
Retrieved the SecIdentity using SecItemCopyMatching
After casting it accordingly, used SecIdentityCopyPrivateKey to retrieve the private key into a SecKeyRef
Used this key in SecSignTransform, and voilà!! It worked!
Here is the working code:
// ...
// get the SecIdentity (substitutes KeySearchDict etc)
idSearchDict = [(kSecClass as String): (kSecClassIdentity as String), (kSecMatchSubjectContains as String): keyMatch, (kSecReturnRef as String):
status = SecItemCopyMatching(idSearchDict, &anyItem)
id = (anyItem!.takeRetainedValue() as SecIdentity)
// Retrieve the private key from SecIdentity
var KeyRef: Unmanaged<SecKeyRef>?
SecIdentityCopyPrivateKey(id, &KeyRef)
priKey = (KeyRef!.takeRetainedValue() as SecKey)
// Create SecSign using the private key
signer = SecSignTransformCreate(priKey, &error).takeRetainedValue()
if error != nil { print("signer transform creation error: ") ; println(error) }
/ signer to get data from sourceData
// ...
I'll post another question with the difficulties I'm facing with XMLDSIG, and add it to the comments, in case anyone is interested. I've already solved that too, and the answer is there in case you need it.
Thanks to everyone who tried to help, and hope this saves someone a lot of time and headache in the future!!
PS: loving Swift, otherwise 😉 😃
This is my first time writing in Swift, Cocoa (have experience in Cocoa Touch), and using Authorization, so I honestly have no idea if I am even on the right track. I am trying to make a modification to the hosts file, which requires user authentication, but both the AuthorizationCreate and AuthorizationExecuteWithPrivileges methods are giving errors.
var authorizationRef:AuthorizationRef
var status:OSStatus
status = AuthorizationCreate(nil, environment:kAuthorizationEmptyEnvironment, flags:kAuthorizationFlagDefaults, authorization:&authorizationRef)
let overwrite_hosts = "echo \(hostsContents) > /private/etc/hosts"
let args = [overwrite_hosts.cStringUsingEncoding(NSUTF8StringEncoding)]
status = AuthorizationExecuteWithPrivileges(authorizationRef, pathToTool:"/bin/sh", options:kAuthorizationFlagDefaults, arguments:args, communicationsPipe:nil)
Me calling AuthorizationCreate is throwing "Type '()' does not conform to protocol 'AuthorizationRef'" and my call of AuthorizationExecuteWithPrivileges is throwing "Could not find an overload for '__conversion' that accepts the supplied arguments"
Any ideas? Am I approaching this incorrectly?
Thanks for any help!
I was able to figure out how to do it via AppleScript, but you should be able to do it using the Authorization method I was trying before, therefore leaving this question open. Anybody looking for a quick solution (no error checks implemented) you can use what I wrote below:
func doScriptWithAdmin(inScript:String) -> String{
let script = "do shell script \"\(inScript)\" with administrator privileges"
var appleScript = NSAppleScript(source: script)
var eventResult = appleScript.executeAndReturnError(nil)
if !eventResult {
return "ERROR"
}else{
return eventResult.stringValue
}
}