lukele

Keybase proof

I hereby claim:

• I am lukele on github.
• I am lukele (https://keybase.io/lukele) on keybase.
• I have a public key whose fingerprint is 608B 00AB E1DA A350 1C5F F91A E582 7132 6F9F 4937

To claim this, I am signing this object:

lukele

#!/bin/bash

if [ -z "$1" ]; then
    echo "usage: ./zibopt-install.sh <build-dir>"
    exit 1
fi

function bailout {
    echo "$1"
    exit 1

lukele

GPGServices v1.8.2 - Release Notes

Features

Symmetric encryption

• One of the most requested GPGServices features has arrived. You can now encrypt with a password. [#74]

lukele

1.) Find the block (subroutine) Hopper
2.) Copy the start address of the block and set a breakpoint to it in lldb (e.g. 0x1000fa522)

(lldb) breakpoint s -a 0x1000fa522

3.) Once your application hits the breakpoint, you can now compare the assembly with the pseudo code in Hopper,
    to find out where the a captured block variable is first captured.
    
var_30 = *___stack_chk_guard;
rax = [*(arg0 + 0x20)->_smimeLock retain];

lukele

ttt

lukele

Hopper Dissassembly:

00000000000478a4         mov        qword [rbp+var_58], rcx                     ; CODE XREF=-[MCMessageGenerator _newOutgoingMessageFromTopLevelMimePart:topLevelHeaders:withPartData:]+329
00000000000478a8         lea        rax, qword [_MCHeaderKeyFrom]
00000000000478af         mov        rdx, qword [rax]
00000000000478b2         mov        rdi, rbx                                    ; argument "instance" for method _objc_msgSend
00000000000478b5         mov        qword [rbp+var_88], rbx
00000000000478bc         mov        rsi, r14                                    ; argument "selector" for method _objc_msgSend
00000000000478bf         call       qword [_objc_msgSend_d85c0]                 ; _objc_msgSend
00000000000478c5         mov        rdi, rax                                    ; argument "instance" for method imp___stubs__objc_retainAutoreleasedReturnValue

lukele

char -[MCMessageGenerator appendDataForMimePart:toData:withPartData:](void * self, void * _cmd, void * arg2, void * arg3, void * arg4) {
    rsi = _cmd;
    var_40 = self;
    r15 = _objc_retain;
    r12 = [arg2 retain];
    var_48 = [arg3 retain];
    r14 = [arg4 retain];
    r15 = _objc_msgSend;
    rbx = [[r14 objectForKey:r12] retain];
    if ([rbx isKindOfClass:[MCMimePart class]] != 0x0) {

lukele

- (id)MAParsedMessage {
    // This method is called, when a message is opened from outside the library (an .eml is loaded.)
    id messageData = [((MCMessage *)self) messageDataIncludingFromSpace:0x0 newDocumentID:0x0 fetchIfNotAvailable:0x1];
    id parsedMessage = nil;
    if (messageData) {
        MCMimePart *topLevelPart = [[MCMimePart alloc] initWithEncodedData:messageData];
        MCMimeBody *body = [MCMimeBody new];
        [body setIvar:kMimeBodyMessageKey value:self];
        [topLevelPart setIvar:kMimePartAllowPGPProcessingKey value:@(YES)];
        [topLevelPart setIvar:@"MimeBody" value:body];

lukele

void * -[MCMimePart _decodeAllowingAttachmentRepresentation: ](void * self, void * _cmd, char arg2) {
    rsi = _cmd;
    r14 = self;
    r13 = _objc_msgSend;
    r15 = 0x0;
    var_30 = [self _isTypeCode: 0x1 subtypeCode: 0x0];
    rbx = [r14 _isTypeCode: 0x7 subtypeCode: 0x8f];
    if (arg2 == 0x0) {
        // inserted procedure _73ca3
        rax = [r14 typeCode];

lukele

- (void)MASetPreferencesController:(NSWindowController *)windowController {
    [self MASetPreferencesController:windowController];
    if(!windowController) {
        return;
    }
    
    NSToolbarItem *toolbarItem = [[NSToolbarItem alloc] initWithItemIdentifier:@"gpgmail"];
    toolbarItem.label = @"GPGMail";
    toolbarItem.image = [NSImage imageNamed:@"GPGMail"];
    NSToolbar *toolbar = [[windowController window] toolbar];