Fix buttons and improve handling of certificates when Safari is not the default browser

certificates/certificates.go

@@ -30,16 +30,13 @@ import (
 	"math/big"
 	"net"
 	"os"
-	"strings"
 	"time"
 
-	"github.com/arduino/arduino-create-agent/utilities"
 	"github.com/arduino/go-paths-helper"
 	log "github.com/sirupsen/logrus"
 )
 
 var (
-	host      = "localhost"
 	validFrom = ""
 	validFor  = 365 * 24 * time.Hour * 2 // 2 years
 	rsaBits   = 2048
@@ -270,41 +267,16 @@ func DeleteCertificates(certDir *paths.Path) {
 	certDir.Join("cert.cer").Remove()
 }
 
-// isExpired checks if a certificate is expired or about to expire (less than 1 month)
-func isExpired() (bool, error) {
+// IsExpired checks if a certificate is expired or about to expire (less than 1 month)
+func IsExpired() (bool, error) {
 	bound := time.Now().AddDate(0, 1, 0)
-	dateS, err := GetExpirationDate()
+	date, err := GetExpirationDate()
 	if err != nil {
 		return false, err
 	}
-	date, _ := time.Parse(time.DateTime, dateS)
 	return date.Before(bound), nil
 }
 
-// PromptInstallCertsSafari prompts the user to install the HTTPS certificates if they are using Safari
-func PromptInstallCertsSafari() bool {
-	buttonPressed := utilities.UserPrompt("display dialog \"The Arduino Agent needs a local HTTPS certificate to work correctly with Safari.\nIf you use Safari, you need to install it.\" buttons {\"Do not install\", \"Install the certificate for Safari\"} default button 2 with title \"Arduino Agent: Install certificate\"")
-	return strings.Contains(string(buttonPressed), "button returned:Install the certificate for Safari")
-}
-
-// PromptExpiredCerts prompts the user to update the HTTPS certificates if they are using Safari
-func PromptExpiredCerts(certDir *paths.Path) {
-	if expired, err := isExpired(); err != nil {
-		log.Errorf("cannot check if certificates are expired something went wrong: %s", err)
-	} else if expired {
-		buttonPressed := utilities.UserPrompt("display dialog \"The Arduino Agent needs a local HTTPS certificate to work correctly with Safari.\nYour certificate is expired or close to expiration. Do you want to update it?\" buttons {\"Do not update\", \"Update the certificate for Safari\"} default button 2 with title \"Arduino Agent: Update certificate\"")
-		if strings.Contains(string(buttonPressed), "button returned:Update the certificate for Safari") {
-			err := UninstallCertificates()
-			if err != nil {
-				log.Errorf("cannot uninstall certificates something went wrong: %s", err)
-			} else {
-				DeleteCertificates(certDir)
-				GenerateAndInstallCertificates(certDir)
-			}
-		}
-	}
-}
-
 // GenerateAndInstallCertificates generates and installs the certificates
 func GenerateAndInstallCertificates(certDir *paths.Path) {
 	GenerateCertificates(certDir)

certificates/certificates_darwin.h

@@ -0,0 +1,7 @@
+const char *getDefaultBrowserName();
+
+const char *installCert(const char *path);
+const char *uninstallCert();
+const bool certInKeychain();
+
+const char *getExpirationDate(long *expirationDate);

certificates/certificates_darwin.m

@@ -0,0 +1,137 @@
+#import <Foundation/Foundation.h>
+#import <AppKit/AppKit.h>
+#include "certificates_darwin.h"
+
+// Used to return error strings (as NSString) as a C-string to the Go code.
+const char *toErrorString(NSString *errString) {
+    NSLog(@"%@", errString);
+    return [errString cStringUsingEncoding:[NSString defaultCStringEncoding]];
+}
+
+// Returns a string describing the name of the default browser set for the user, nil in case of error.
+const char *getDefaultBrowserName() {
+    NSURL *defaultBrowserURL = [[NSWorkspace sharedWorkspace] URLForApplicationToOpenURL:[NSURL URLWithString:@"http://"]];
+    if (defaultBrowserURL) {
+        NSBundle *defaultBrowserBundle = [NSBundle bundleWithURL:defaultBrowserURL];
+        NSString *defaultBrowser = [defaultBrowserBundle objectForInfoDictionaryKey:@"CFBundleDisplayName"];
+
+        return [defaultBrowser cStringUsingEncoding:[NSString defaultCStringEncoding]];
+    }
+
+    return "";
+}
+
+// inspired by https://stackoverflow.com/questions/12798950/ios-install-ssl-certificate-programmatically
+const char *installCert(const char *path) {
+    NSURL *url = [NSURL fileURLWithPath:@(path) isDirectory:NO];
+    NSData *rootCertData = [NSData dataWithContentsOfURL:url];
+
+    OSStatus err = noErr;
+    SecCertificateRef rootCert = SecCertificateCreateWithData(kCFAllocatorDefault, (CFDataRef) rootCertData);
+
+    CFTypeRef result;
+
+    NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys:
+        (id)kSecClassCertificate, kSecClass,
+        rootCert, kSecValueRef,
+        nil];
+
+    err = SecItemAdd((CFDictionaryRef)dict, &result);
+
+    if (err == noErr) {
+        NSLog(@"Install root certificate success");
+    } else if (err == errSecDuplicateItem) {
+        NSString *errString = [@"duplicate root certificate entry. Error: " stringByAppendingFormat:@"%d", err];
+        NSLog(@"%@", errString);
+        return [errString cStringUsingEncoding:[NSString defaultCStringEncoding]];
+    } else {
+        NSString *errString = [@"install root certificate failure. Error: " stringByAppendingFormat:@"%d", err];
+        NSLog(@"%@", errString);
+        return [errString cStringUsingEncoding:[NSString defaultCStringEncoding]];
+    }
+
+    NSDictionary *newTrustSettings = @{(id)kSecTrustSettingsResult: [NSNumber numberWithInt:kSecTrustSettingsResultTrustRoot]};
+    err = SecTrustSettingsSetTrustSettings(rootCert, kSecTrustSettingsDomainUser, (__bridge CFTypeRef)(newTrustSettings));
+    if (err != errSecSuccess) {
+        NSString *errString = [@"Could not change the trust setting for a certificate. Error: " stringByAppendingFormat:@"%d", err];
+        NSLog(@"%@", errString);
+        return [errString cStringUsingEncoding:[NSString defaultCStringEncoding]];
+    }
+
+    return "";
+}
+
+const char *uninstallCert() {
+    // Each line is a key-value of the dictionary. Note: the the inverted order, value first then key.
+    NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys:
+        (id)kSecClassCertificate, kSecClass,
+        CFSTR("Arduino"), kSecAttrLabel,
+        kSecMatchLimitOne, kSecMatchLimit,
+        kCFBooleanTrue, kSecReturnAttributes,
+        nil];
+
+    OSStatus err = noErr;
+    // Use this function to check for errors
+    err = SecItemCopyMatching((CFDictionaryRef)dict, nil);
+    if (err == noErr) {
+        err = SecItemDelete((CFDictionaryRef)dict);
+        if (err != noErr) {
+            NSString *errString = [@"Could not delete the certificates. Error: " stringByAppendingFormat:@"%d", err];
+            NSLog(@"%@", errString);
+            return [errString cStringUsingEncoding:[NSString defaultCStringEncoding]];
+        }
+    } else if (err != errSecItemNotFound){
+        NSString *errString = [@"Error: " stringByAppendingFormat:@"%d", err];
+        NSLog(@"%@", errString);
+        return [errString cStringUsingEncoding:[NSString defaultCStringEncoding]];
+    }
+    return "";
+}
+
+const bool certInKeychain() {
+    // Create a key-value dictionary used to query the Keychain and look for the "Arduino" root certificate.
+    NSDictionary *getquery = @{
+                (id)kSecClass:     (id)kSecClassCertificate,
+                (id)kSecAttrLabel: @"Arduino",
+                (id)kSecReturnRef: @YES,
+            };
+
+    OSStatus err = SecItemCopyMatching((CFDictionaryRef)getquery, nil);
+    return (err == noErr); // No error means the certificate was found, otherwise err will be "errSecItemNotFound".
+}
+
+// Returns the expiration date "kSecOIDX509V1ValidityNotAfter" of the Arduino certificate.
+// The value is returned as a CFAbsoluteTime: a long number of seconds from the date of 1 Jan 2001 00:00:00 GMT.
+const char *getExpirationDate(long *expirationDate) {
+    // Create a key-value dictionary used to query the Keychain and look for the "Arduino" root certificate.
+    NSDictionary *getquery = @{
+                (id)kSecClass:     (id)kSecClassCertificate,
+                (id)kSecAttrLabel: @"Arduino",
+                (id)kSecReturnRef: @YES,
+            };
+
+    SecCertificateRef cert = NULL;
+
+    // Search the keychain for certificates matching the query above.
+    OSStatus err = SecItemCopyMatching((CFDictionaryRef)getquery, (CFTypeRef *)&cert);
+    if (err != noErr) return toErrorString([@"Error getting the certificate: " stringByAppendingFormat:@"%d", err]);
+
+    // Get data from the certificate, as a dictionary of properties. We just need the "invalidity not after" property.
+    CFDictionaryRef certDict = SecCertificateCopyValues(cert, 
+        (__bridge CFArrayRef)@[(__bridge id)kSecOIDX509V1ValidityNotAfter], NULL);
+    if (certDict == NULL) return toErrorString(@"SecCertificateCopyValues failed");
+
+
+    // Get the "validity not after" property as a dictionary, and get the "value" key (that is a number).
+    CFDictionaryRef validityNotAfterDict = CFDictionaryGetValue(certDict, kSecOIDX509V1ValidityNotAfter);
+    if (validityNotAfterDict == NULL) return toErrorString(@"CFDictionaryGetValue (validity) failed");
+
+    CFNumberRef number = (CFNumberRef)CFDictionaryGetValue(validityNotAfterDict, kSecPropertyKeyValue);
+    if (number == NULL) return toErrorString(@"CFDictionaryGetValue (keyValue) failed");
+
+    CFNumberGetValue(number, kCFNumberSInt64Type, expirationDate);
+    // NSLog(@"Certificate validity not after: %ld", *expirationDate);
+
+    CFRelease(certDict);
+    return ""; // No error.
+}