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#ifndef CRYPTO_BUFFER_H
#define CRYPTO_BUFFER_H
#include "uint.h"
#include "blowfish.h"
#include "twofish.h"
#include "aes.h"
#include "des.h"
struct info{
u32 strlen; /* number of uint8 of clear data */
u32 bytes; /* number of bytes of encrypted data */
};
#define ENCRYPT 0x0000
#define DECRYPT 0x0001
#define BLOWFISH 0x0002
#define TWOFISH 0x0004
#define AES 0x0008
#define DES 0x0010
#define DES3_EDE 0x0020
typedef int (*operation)(int ,u8* ,u32);
typedef struct crypto_buffer {
u8 *c_buffer; /* clear data buffer */
u8* c_ptr; /* clear data to read */
u8* c_end; /* end of c_buffer */
u8 *e_buffer; /* encrypted data buffer */
u8* e_ptr; /* encrypted data to read */
u8* e_end; /* end of e_buffer */
u32 e_len; /* length of e_buffer */
u32 block_size; /* size of blocks used by cipher */
struct info *e_data; /* pointer for write operations */
struct info data_st; /* info structure for read and write operations */
int fd; /* file descriptor */
operation op; /* read/write operation */
void (*cipher)(void*, u8 *, const u8 *); /* encryption/decryption function */
union{ /* cipher ctx */
struct blowfish_ctx bf_cxt;
struct twofish_ctx tf_cxt;
}ctx;
} crypto_buffer;
/* initialize a buffer for read or write operation
* buffer struct
* file descriptor
* read or write operation
* number of blocks in buffer
* type of cipher (BLOWFISH/TWOFISH/AES | ENCRYPT/DECRYPT)
* encryption key
* length of encryption key
*/
int crypto_buffer_init(crypto_buffer *b, int fd, operation op, u32 blocks, int type, u8 *key, u32 k_len);
/* force write on fd */
int crypto_buffer_flush(crypto_buffer *b);
/* read data from buffer */
int crypto_buffer_get(crypto_buffer *b, u8 *s, u32 len);
/* add data to buffer */
int crypto_buffer_put(crypto_buffer *b, const u8 *s, u32 len);
/* add data to buffer then force write on fd */
int crypto_buffer_putflush(crypto_buffer *b, const u8 *s, u32 len);
/* read/write to fd */
int u8_unix_read(int fd, u8 *s, u32 len);
int u8_unix_write(int fd, u8 *s, u32 len);
/* not really usefull read/write also work */
int u8_tcp_read(int sd, u8 *s, u32 len);
int u8_tcp_write(int sd, u8 *s, u32 len);
#endif
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