diff -r 8982b8fada63 -r dee779b84a95 MYCryptor.m
--- a/MYCryptor.m	Tue Apr 07 10:56:58 2009 -0700
+++ b/MYCryptor.m	Thu Apr 09 22:47:11 2009 -0700
@@ -57,11 +57,14 @@
          fromPassphrase: (NSString*)passphrase
                    salt: (id)salt
 {
+    // This follows algorithm PBKDF1 from PKCS#5 v2.0, with Hash=SHA-256 and c=13.
     Assert(passphrase);
     Assert(salt);
     passphrase = $sprintf(@"MYCrypto|%@|%@", passphrase, salt);
     size_t lengthInBytes = (lengthInBits + 7)/8;
     MYDigest *digest = [[passphrase dataUsingEncoding: NSUTF8StringEncoding] my_SHA256Digest];
+    for (int i=0; i<12; i++)
+        digest = digest.asData.my_SHA256Digest;
     if (lengthInBytes <= digest.length)
         return [digest.asData subdataWithRange: NSMakeRange(0,lengthInBytes)];
     else
@@ -126,7 +129,7 @@
 
 - (BOOL) _outputBytes: (const void*)bytes length: (size_t)length {
     if (_outputStream) {
-        NSInteger written = [_outputStream write: bytes maxLength: length];
+        size_t written = [_outputStream write: bytes maxLength: length];
         if (written < 0) {
             self.error = _outputStream.streamError;
             if (_error)