Let -[checkCertificate] return a BOOL and a reason.

Throwing an exception there was strange.

src/XMPPConnection.h

@@ -218,11 +218,15 @@
 - (void)close;
 
 /**
- * \brief Checks the certificate presented by the server.
+ * \brief Checks the certificate presented by the server and sets the specified
+ *	  pointer to the reason why the certificate is not valid
  *
- * \throw SSLInvalidCertificateException Thrown if the certificate is invalid
+ * \param reason A pointer to an OFString which is set to a reason in case the
+ *		 certificate is not valid (otherwise, it does not touch it).
+ *		 Passing NULL means the reason is not stored anywhere.
+ * \return Whether the certificate is valid
  */
-- (void)checkCertificate;
+- (BOOL)checkCertificateAndGetReason: (OFString**)reason;
 
 /**
  * \brief Starts a loop handling incomming data.

src/XMPPConnection.m

@@ -346,32 +346,40 @@
 	return streamOpen;
 }
 
-- (void)checkCertificate
+- (BOOL)checkCertificateAndGetReason: (OFString**)reason
 {
 	X509Certificate *cert;
 	OFDictionary *SANs;
 	BOOL serviceSpecific = NO;
 
+	@try {
 		[sock verifyPeerCertificate];
+	} @catch (SSLInvalidCertificateException *e) {
+		if (reason != NULL)
+			*reason = [[[e reason] copy] autorelease];
+
+		return NO;
+	}
+
 	cert = [sock peerCertificate];
 	SANs = [cert subjectAlternativeName];
 
 	if ([[SANs objectForKey: @"otherName"]
-		objectForKey: OID_SRVName] ||
-	     [SANs objectForKey: @"dNSName"] ||
-	     [SANs objectForKey: @"uniformResourceIdentifier"])
+		objectForKey: OID_SRVName] != nil ||
+	     [SANs objectForKey: @"dNSName"] != nil ||
+	     [SANs objectForKey: @"uniformResourceIdentifier"] != nil)
 		serviceSpecific = YES;
 
 	if ([cert hasSRVNameMatchingDomain: domainToASCII
 				   service: @"xmpp-client"] ||
 	    [cert hasDNSNameMatchingDomain: domainToASCII])
-		return;
+		return YES;
 
-	if (serviceSpecific ||
-	    ![cert hasCommonNameMatchingDomain: domainToASCII])
-		@throw [SSLInvalidCertificateException
-		    exceptionWithClass: isa
-				reason: @"No matching identifier"];
+	if (!serviceSpecific &&
+	    [cert hasCommonNameMatchingDomain: domainToASCII])
+		return YES;
+
+	return NO;
 }
 
 - (void)sendStanza: (OFXMLElement*)element

tests/test.m

@@ -24,7 +24,6 @@
 #include <assert.h>
 
 #import <ObjFW/ObjFW.h>
-#import <ObjOpenSSL/SSLInvalidCertificateException.h>
 
 #import "XMPPConnection.h"
 #import "XMPPJID.h"
@@ -168,16 +167,15 @@ OF_APPLICATION_DELEGATE(AppDelegate)
 
 - (void)connectionDidUpgradeToTLS: (XMPPConnection*)conn_
 {
-	@try {
-		[conn_ checkCertificate];
-	} @catch (SSLInvalidCertificateException *e) {
-		OFString *answer;
+	OFString *reason;
+
+	if (![conn_ checkCertificateAndGetReason: &reason]) {
 		[of_stdout writeString: @"Couldn't verify certificate: "];
-		[of_stdout writeFormat: @"%@\n", e];
+		[of_stdout writeFormat: @"%@\n", reason];
 		[of_stdout writeString: @"Do you want to continue [y/N]? "];
-		answer = [of_stdin readLine];
-		if (![answer hasPrefix: @"y"])
-			@throw e;
+
+		if (![[of_stdin readLine] hasPrefix: @"y"])
+			[OFApplication terminateWithStatus: 1];
 	}
 }