Add the 3.3.3 sources for class-dump.

class-dump/src/NSData-CDExtensions.m

+// -*- mode: ObjC -*-
+
+//  This file is part of class-dump, a utility for examining the Objective-C segment of Mach-O files.
+//  Copyright (C) 1997-1998, 2000-2001, 2004-2010 Steve Nygard.
+
+#import "NSData-CDExtensions.h"
+
+#include <openssl/sha.h>
+
+@implementation NSData (CDExtensions)
+
+- (NSString *)SHA1DigestString;
+{
+    NSMutableString *str;
+    unsigned char digest[SHA_DIGEST_LENGTH];
+    unsigned int index;
+
+    //NSLog(@"Calculating SHA1 of %u bytes", [self length]);
+    SHA1((unsigned char *)[self bytes], [self length], digest);
+
+    //NSLog(@"SHA_DIGEST_LENGTH: %u", SHA_DIGEST_LENGTH);
+    str = [NSMutableString string];
+    for (index = 0; index < SHA_DIGEST_LENGTH; index++)
+        [str appendFormat:@"%02x", digest[index]];
+
+    //NSLog(@"result is %@", str);
+
+    return str;
+}
+
+@end