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/**
* @file llcipher.h
* @brief Abstract base class for encryption ciphers.
*
* Copyright (c) 2003-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#ifndef LLCIPHER_H
#define LLCIPHER_H
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLCipher
//
// Abstract base class for a cipher object.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
class LLCipher
{
public:
virtual ~LLCipher() {}
// encrypt src and place result into dst. returns TRUE if
// Returns number of bytes written into dst, or 0 on error.
virtual U32 encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) = 0;
// decrypt src and place result into dst.
// Returns number of bytes written into dst, or 0 on error.
virtual U32 decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) = 0;
// returns the minimum amount of space required to encrypt for a
// unencrypted source buffer of length len.
// *NOTE: This is estimated space and you should check the return value
// of the encrypt function.
virtual U32 requiredEncryptionSpace(U32 src_len) const = 0 ;
};
#endif
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