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chacha20stream/include/cc20.h

70 lines
1.4 KiB

#ifndef _CC20_H
#define _CC20_H
#include <stdint.h>
#include <stddef.h>
#define KEY_SIZE 32
#define IV_SIZE 12
enum cc20_mode {
CC20_ENCRYPT,
CC20_DECRYPT,
};
typedef enum cc20_error {
CC20_ERR_PANIC = -1,
CC20_ERR_NONE = 0,
CC20_ERR_INVALID_FILE,
CC20_ERR_NULL_PTR,
CC20_ERR_SSL,
CC20_ERR_IO
} cc20_result_t;
#define CC20_OK(v) ((v)==CC20_ERR_NONE)
#define CC20_ERR(v) ((v)!=CC20_ERR_NONE)
typedef uint8_t cc20_key_t[KEY_SIZE];
typedef uint8_t cc20_iv_t[IV_SIZE];
typedef struct cc20_metadata {
FILE* backing;
cc20_key_t key;
cc20_iv_t iv;
enum cc20_mode mode;
} cc20_meta_t;
typedef struct cc20_sink cc20_sink_t;
cc20_result_t cc20_keygen(cc20_key_t* restrict key,
cc20_iv_t* restrict iv);
cc20_result_t cc20_gen_meta(FILE* file,
const cc20_key_t* key,
const cc20_iv_t* iv,
enum cc20_mode mode,
struct cc20_metadata* restrict output);
cc20_sink_t* cc20_gen_sink(const struct cc20_metadata* meta);
cc20_sink_t* cc20_gen_sink_full(FILE* file,
const cc20_key_t* key,
const cc20_iv_t* iv,
enum cc20_mode mode);
FILE* cc20_wrap_full(FILE* file,
const cc20_key_t* key,
const cc20_iv_t* iv,
enum cc20_mode mode);
FILE* cc20_gen(const struct cc20_metadata* meta);
cc20_result_t cc20_close_sink(cc20_sink_t* sink,
struct cc20_metadata* restrict meta);
FILE* cc20_wrap_sink(cc20_sink_t* sink);
size_t cc20_write(const void* ptr, size_t size, size_t nmemb, cc20_sink_t* restrict sink);
#endif /* _CC20_H */