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/*
Mosh: the mobile shell
Copyright 2012 Keith Winstein
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CRYPTO_HPP
#define CRYPTO_HPP
#include "ae.h"
#include <string>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
using std::string;
long int myatoi( const char *str );
namespace Crypto {
class CryptoException {
public:
string text;
bool fatal;
CryptoException( string s_text, bool s_fatal = false )
: text( s_text ), fatal( s_fatal ) {};
};
/* 16-byte-aligned buffer, with length. */
class AlignedBuffer {
private:
size_t m_len;
void *m_allocated;
char *m_data;
public:
AlignedBuffer( size_t len, const char *data = NULL );
~AlignedBuffer() {
free( m_allocated );
}
char * data( void ) const { return m_data; }
size_t len( void ) const { return m_len; }
private:
/* Not implemented */
AlignedBuffer( const AlignedBuffer& );
AlignedBuffer& operator=( const AlignedBuffer& );
};
class Base64Key {
private:
unsigned char key[ 16 ];
public:
Base64Key(); /* random key */
Base64Key( string printable_key );
string printable_key( void ) const;
unsigned char *data( void ) { return key; }
};
class Nonce {
private:
char bytes[ 12 ] __attribute__((__aligned__ (16)));
public:
Nonce( uint64_t val );
Nonce( char *s_bytes, size_t len );
string cc_str( void ) { return string( (char *)( bytes + 4 ), 8 ); }
char *data( void ) { return bytes; }
uint64_t val( void );
};
class Message {
public:
Nonce nonce;
string text;
Message( char *nonce_bytes, size_t nonce_len,
char *text_bytes, size_t text_len );
Message( Nonce s_nonce, string s_text );
};
class Session {
private:
Base64Key key;
AlignedBuffer ctx_buf;
ae_ctx *ctx;
uint64_t blocks_encrypted;
public:
Session( Base64Key s_key );
~Session();
string encrypt( Message plaintext );
Message decrypt( string ciphertext );
Session( const Session & );
Session & operator=( const Session & );
};
void disable_dumping_core( void );
void reenable_dumping_core( void );
}
#endif
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