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