sym_crypto.h

xen虚拟机源代码安装包

// ===================================================================
// 
// Copyright (c) 2005, Intel Corp.
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// ===================================================================
// 
// sym_crypto.h
// 
//     Symmetric Crypto 
// 
// ==================================================================

#ifndef _SYM_CRYPTO_H
#define _SYM_CRYPTO_H

#include <openssl/evp.h>
#include "buffer.h"

typedef struct symkey_t {
  buffer_t key;
  
  EVP_CIPHER_CTX context;
  const EVP_CIPHER * cipher;
} symkey_t;

extern const EVP_CIPHER * SYM_CIPHER;

TPM_RESULT Crypto_symcrypto_genkey (symkey_t * key);

TPM_RESULT Crypto_symcrypto_initkey (symkey_t * key, const buffer_t* keybits);


// these functions will allocate their output buffers
TPM_RESULT Crypto_symcrypto_encrypt (symkey_t* key,
                              const buffer_t* clear,
                              buffer_t* o_cipher);

TPM_RESULT Crypto_symcrypto_decrypt (symkey_t* key,
                              const buffer_t* cipher,
                              buffer_t* o_clear);

// only free the internal parts, not the 'key' ptr
TPM_RESULT Crypto_symcrypto_freekey (symkey_t * key);

#endif /* _SYM_CRYPTO_H */