--- /dev/null
+/* Copyright (c) 1998,2011,2014 Apple Inc. All Rights Reserved.
+ *
+ * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
+ * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
+ * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE, INC. AND THE
+ * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE,
+ * INC. ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
+ * EXPOSE YOU TO LIABILITY.
+ ***************************************************************************
+ *
+ * NSFEEPublicKey.h
+ *
+ * Revision History
+ * ----------------
+ * 27 Feb 1997 at Apple
+ * Broke out from NSCryptors.h.
+ */
+
+#import <CryptKit/NSCryptors.h>
+
+@interface NSFEEPublicKey : NSObject
+ <NSPublicKey,NSDigitalSignature,NSCryptor> {
+@private
+ void *_pubKey;
+}
+
++ keyWithPrivateData:(NSData *)private
+ depth:(unsigned)depth // depth is in range 0-23
+ usageName:(NSString *)uname;
+ // able to encrypt/decrypt data
+ // able to create/verify digital signatures
+
++ keyWithPublicKeyString:(NSString *)hexstr;
+ // able to encrypt data
+ // able to verify digital signatures
+
+/*
+ * Create new key with curve parameters matching existing oldKey.
+ */
++ keyWithPrivateData:(NSData *)passwd
+ andKey:(NSFEEPublicKey *)oldKey
+ usageName:(NSString *)uname;
+
+/*
+ * Convenience methods. The first three use the default depth
+ * (FEE_DEPTH_DEFAULT).
+ */
++ keyWithPrivateData:(NSData *)passwd
+ usageName:(NSString *)uname;
++ keyWithPrivateString:(NSString *)private
+ usageName:(NSString *)uname;
++ keyWithPrivateString:(NSString *)private
+ andKey:(NSFEEPublicKey *)oldKey
+ usageName:(NSString *)uname;
+
++ keyWithPrivateString:(NSString *)private
+ depth:(unsigned)depth
+ usageName:(NSString *)uname;
+
+/*
+ * NSCryptor protocol
+ */
+- (NSData *)encryptData:(NSData *)data; // done with public knowledge
+- (NSData *)decryptData:(NSData *)data; // done with private knowledge
+
+/*
+ * NSDigitalSignature protocol
+ */
+- (NSData *)digitalSignatureForData:(NSData *)data;
+ // data is hashed with MD5 and then signed with private knowledge
+- (BOOL)isValidDigitalSignature:(NSData *)sig forData:(NSData *)data;
+ // data is hashed with MD5 and then verified with public knowledge
+
+@end