initial commit, resurrect one of my realy old projects

1 files changed, 77 insertions, 0 deletions

diff --git a/crypto_buffer.h b/crypto_buffer.h
new file mode 100644
index 0000000..51e233e
--- /dev/null
+++ b/crypto_buffer.h
@@ -0,0 +1,77 @@
+#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