From ca4c087f0220de1764f05f6349e3c0200228057c Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Fri, 9 May 2008 08:24:47 +0000
Subject: - Don't call CAPABILITY twice if possible (RFC3501 [7.1])

---
 program/lib/imap.inc | 42 ++++++++++++++++++++++++++----------------
 1 file changed, 26 insertions(+), 16 deletions(-)

(limited to 'program/lib')

diff --git a/program/lib/imap.inc b/program/lib/imap.inc
index 918e71a18..0d7bc6cd3 100644
--- a/program/lib/imap.inc
+++ b/program/lib/imap.inc
@@ -51,6 +51,9 @@
 		- Abort do-loop on socket errors (fgets returns false)
 		- $ICL_SSL is not boolean anymore but contains the connection schema (ssl or tls)
 		- Removed some debuggers (echo ...)
+		File altered by Aleksander Machniak <alec@alec.pl>
+		- RFC3501 [7.1] don't call CAPABILITY twice if possible in iil_Connect()
+		
 
 ********************************************************/
 
@@ -473,36 +476,43 @@ function iil_Connect($host, $user, $password) {
 	}
 
 	$iil_error .= "Socket connection established\r\n";
-	$line       = iil_ReadLine($conn->fp, 300);
+	$line       = iil_ReadLine($conn->fp, 1024);
 
-	if (strcasecmp($auth_method, "check") == 0) {
-		//check for supported auth methods
-		
-		//default to plain text auth
-		$auth_method = 'plain';
-			
-		//check for CRAM-MD5
+	// RFC3501 [7.1] optional CAPABILITY response
+	if (preg_match('/\[CAPABILITY ([^]]+)\]/i', $line, $matches)) {
+		$conn->capability = explode(' ', $matches[1]);
+	} else {
 		fputs($conn->fp, "cp01 CAPABILITY\r\n");
 		do {
-		    $line = trim(chop(iil_ReadLine($conn->fp, 100)));
+			$line = trim(chop(iil_ReadLine($conn->fp, 100)));
 
-		    $conn->message .= "$line\n";
+			$conn->message .= "$line\n";
 
 			$a = explode(' ', $line);
 			if ($line[0] == '*') {
 				while (list($k, $w) = each($a)) {
-				    if ($w != '*' && $w != 'CAPABILITY') {
+					if ($w != '*' && $w != 'CAPABILITY')
     					$conn->capability[] = $w;
-                    }
-					if ((strcasecmp($w, "AUTH=CRAM_MD5") == 0)||
-						(strcasecmp($w, "AUTH=CRAM-MD5") == 0)) {
-					    $auth_method = "auth";
-					}
 				}
 			}
 		} while ($a[0] != 'cp01');
 	}
 
+	if (strcasecmp($auth_method, "check") == 0) {
+		//check for supported auth methods
+		
+		//default to plain text auth
+		$auth_method = 'plain';
+			
+		//check for CRAM-MD5
+		foreach ($conn->capability as $c)
+			if (strcasecmp($c, 'AUTH=CRAM_MD5') == 0 ||
+				strcasecmp($c, 'AUTH=CRAM-MD5') == 0) {
+				$auth_method = 'auth';
+				break;
+			}
+	}
+
 	if (strcasecmp($auth_method, 'auth') == 0) {
 		$conn->message .= "Trying CRAM-MD5\n";
 
-- 
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