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openssl/engines/ccgost/gost_keywrap.h

+/**********************************************************************
+ *                         gost_keywrap.h                             *
+ *             Copyright (c) 2005-2006 Cryptocom LTD                  *
+ *       This file is distributed under the same license as OpenSSL   *
+ *                                                                    *
+ * Implementation of CryptoPro key wrap algorithm, as defined in      *
+ * RFC 4357 p 6.3 and 6.4                                             *
+ * Doesn't need OpenSSL                                               *
+ **********************************************************************/
+#ifndef GOST_KEYWRAP_H
+#define GOST_KEYWRAP_H
+#include <string.h>
+#include "gost89.h"
+/* Diversifies key using random UserKey Material
+ * Implements RFC 4357 p 6.5 key diversification algorithm 
+ * 
+ * inputKey - 32byte key to be diversified
+ * ukm - 8byte user key material
+ * outputKey - 32byte buffer to store diversified key 
+ *
+ */
+void keyDiversifyCryptoPro(gost_ctx *ctx,
+        const unsigned char *inputKey, 
+        const unsigned char *ukm, 
+        unsigned char *outputKey);
+/*
+ * Wraps key using RFC 4357 6.3
+ * ctx - gost encryption context, initialized with some S-boxes 
+ * keyExchangeKey (KEK) 32-byte (256-bit) shared key
+ * ukm - 8 byte (64 bit) user key material, 
+ * sessionKey - 32-byte (256-bit) key to be wrapped
+ * wrappedKey - 44-byte buffer to store wrapped key
+ */ 
+
+int keyWrapCryptoPro(gost_ctx *ctx,
+        const unsigned char *keyExchangeKey, 
+        const unsigned char *ukm,
+        const   unsigned char *sessionKey, 
+        unsigned char *wrappedKey) ;
+/*
+ * Unwraps key using RFC 4357 6.4
+ * ctx - gost encryption context, initialized with some S-boxes 
+ * keyExchangeKey 32-byte shared key
+ * wrappedKey  44 byte key to be unwrapped (concatenation of 8-byte UKM,
+ * 32 byte  encrypted key and 4 byte MAC  
+ * 
+ * sessionKEy - 32byte buffer to store sessionKey in
+ * Returns 1 if key is decrypted successfully, and 0 if MAC doesn't match
+ */ 
+
+
+int keyUnwrapCryptoPro(gost_ctx *ctx,
+        const unsigned char *keyExchangeKey,
+        const unsigned char *wrappedKey, 
+        unsigned char *sessionKey) ;
+#endif