Display fingerprints.

Signal/src/view controllers/FingerprintViewController.h

@@ -7,9 +7,12 @@
 //
 
 #import <UIKit/UIKit.h>
+#import "TSContactThread.h"
 
 @interface FingerprintViewController : UIViewController
 
+- (void)configWithThread:(TSThread*)thread;
+
 @property (nonatomic, strong) IBOutlet UILabel     * presentationLabel;
 
 @property (nonatomic, strong) IBOutlet UIImageView * contactImageView;

Signal/src/view controllers/FingerprintViewController.m

@@ -8,14 +8,44 @@
 
 #import "FingerprintViewController.h"
 
+#import "Cryptography.h"
+#import <AxolotlKit/NSData+keyVersionByte.h>
+#import <25519/Curve25519.h>
+#import "NSData+hexString.h"
 #import "DJWActionSheet.h"
+#import "TSStorageManager.h"
+#import "TSStorageManager+IdentityKeyStore.h"
 
 @interface FingerprintViewController ()
-
+@property TSContactThread *thread;
 @end
 
 @implementation FingerprintViewController
 
+- (void)configWithThread:(TSThread *)thread{
+    self.thread = (TSContactThread*)thread;
+}
+
+- (NSString*)getFingerprintForDisplay:(NSData*)identityKey {
+    // idea here is to insert a space every two characters. there is probably a cleverer/more native way to do this.
+    
+    identityKey = [identityKey prependKeyType];
+    NSString *fingerprint = [identityKey hexadecimalString];
+    __block NSString*  formattedFingerprint = @"";
+    
+    
+    [fingerprint enumerateSubstringsInRange:NSMakeRange(0, [fingerprint length])
+                                    options:NSStringEnumerationByComposedCharacterSequences
+                                 usingBlock:
+     ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
+         if (substringRange.location % 2 != 0 && substringRange.location != [fingerprint length]-1) {
+             substring = [substring stringByAppendingString:@" "];
+         }
+         formattedFingerprint = [formattedFingerprint stringByAppendingString:substring];
+     }];
+    return formattedFingerprint;
+}
+
 - (void)viewDidLoad {
     [super viewDidLoad];
     
@@ -25,8 +55,15 @@
     
 }
 
--(void)viewWillAppear:(BOOL)animated
+- (void)viewWillAppear:(BOOL)animated
 {
+    self.contactFingerprintTitleLabel.text = self.thread.name;
+    NSData *identityKey = [[TSStorageManager sharedManager] identityKeyForRecipientId:self.thread.contactIdentifier];
+    self.contactFingerprintLabel.text = [self getFingerprintForDisplay:identityKey];
+    
+    NSData *myPublicKey = [[TSStorageManager sharedManager] identityKeyPair].publicKey;
+    self.userFingerprintLabel.text = [self getFingerprintForDisplay:myPublicKey];
+    
     [UIView animateWithDuration:0.6 delay:0. options:UIViewAnimationOptionCurveEaseInOut animations:^{
         [self.view setAlpha:1];
     } completion:nil];
@@ -38,7 +75,7 @@
 }
 
 #pragma mark - Initializers
--(void)initializeImageViews
+- (void)initializeImageViews
 {
     _contactImageView.image = [UIImage imageNamed:@"defaultConctact_light"];
     _contactImageView.layer.cornerRadius = 75.f/2;
@@ -54,7 +91,7 @@
 }
 
 #pragma mark - Action
--(IBAction)closeButtonAction:(id)sender
+- (IBAction)closeButtonAction:(id)sender
 {
     [UIView animateWithDuration:0.6 delay:0. options:UIViewAnimationOptionCurveEaseInOut animations:^{
         [self.view setAlpha:0];
@@ -64,7 +101,7 @@
 
 }
 
--(IBAction)shredAndDelete:(id)sender
+- (IBAction)shredAndDelete:(id)sender
 {
     [DJWActionSheet showInView:self.view withTitle:@"Are you sure wou want to shred all communications with this contact ? This action is irreversible."
              cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@[@"Shred all communications & delete contact"]
@@ -81,19 +118,9 @@
 
 #pragma mark - Shredding & Deleting
 
--(void)shredAndDelete
+- (void)shredAndDelete
 {
     
 }
 
-/*
-#pragma mark - Navigation
-
-// In a storyboard-based application, you will often want to do a little preparation before navigation
-- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
-    // Get the new view controller using [segue destinationViewController].
-    // Pass the selected object to the new view controller.
-}
-*/
-
 @end

Signal/src/view controllers/MessagesViewController.m

@@ -10,6 +10,7 @@
 
 #import "MessagesViewController.h"
 #import "FullImageViewController.h"
+#import "FingerprintViewController.h"
 
 #import "JSQCallCollectionViewCell.h"
 #import "JSQCall.h"
@@ -195,6 +196,7 @@ typedef enum : NSUInteger {
     [self performSegueWithIdentifier:@"fingerprintSegue" sender:self];
 }
 
+
 #pragma mark - Calls
 
 -(BOOL)isRedPhoneReachable
@@ -508,6 +510,12 @@ typedef enum : NSUInteger {
         FullImageViewController* dest = [segue destinationViewController];
         dest.image = tappedImage;
         
+    } else if ([segue.identifier isEqualToString:@"fingerprintSegue"]){
+        FingerprintViewController *vc = [segue destinationViewController];
+        TSContactThread *thread = (TSContactThread*) self.thread;
+        [self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
+            [vc configWithThread:self.thread];
+        }];
     }
 }