1 #ifndef crypto_secretbox_xsalsa20poly1305_H
2 #define crypto_secretbox_xsalsa20poly1305_H
3 
4 #include <stddef.h>
5 #include "crypto_stream_xsalsa20.h"
6 #include "export.h"
7 
8 #ifdef __cplusplus
9 # ifdef __GNUC__
10 #  pragma GCC diagnostic ignored "-Wlong-long"
11 # endif
12 extern "C" {
13 #endif
14 
15 #define crypto_secretbox_xsalsa20poly1305_KEYBYTES 32U
16 SODIUM_EXPORT
17 size_t crypto_secretbox_xsalsa20poly1305_keybytes(void);
18 
19 #define crypto_secretbox_xsalsa20poly1305_NONCEBYTES 24U
20 SODIUM_EXPORT
21 size_t crypto_secretbox_xsalsa20poly1305_noncebytes(void);
22 
23 #define crypto_secretbox_xsalsa20poly1305_MACBYTES 16U
24 SODIUM_EXPORT
25 size_t crypto_secretbox_xsalsa20poly1305_macbytes(void);
26 
27 /* Only for the libsodium API - The NaCl compatibility API would require BOXZEROBYTES extra bytes */
28 #define crypto_secretbox_xsalsa20poly1305_MESSAGEBYTES_MAX \
29     (crypto_stream_xsalsa20_MESSAGEBYTES_MAX - crypto_secretbox_xsalsa20poly1305_MACBYTES)
30 SODIUM_EXPORT
31 size_t crypto_secretbox_xsalsa20poly1305_messagebytes_max(void);
32 
33 SODIUM_EXPORT
34 int crypto_secretbox_xsalsa20poly1305(unsigned char *c,
35                                       const unsigned char *m,
36                                       unsigned long long mlen,
37                                       const unsigned char *n,
38                                       const unsigned char *k)
39             __attribute__ ((nonnull(1, 4, 5)));
40 
41 SODIUM_EXPORT
42 int crypto_secretbox_xsalsa20poly1305_open(unsigned char *m,
43                                            const unsigned char *c,
44                                            unsigned long long clen,
45                                            const unsigned char *n,
46                                            const unsigned char *k)
47             __attribute__ ((warn_unused_result)) __attribute__ ((nonnull(2, 4, 5)));
48 
49 SODIUM_EXPORT
50 void crypto_secretbox_xsalsa20poly1305_keygen(unsigned char k[crypto_secretbox_xsalsa20poly1305_KEYBYTES])
51             __attribute__ ((nonnull));
52 
53 /* -- NaCl compatibility interface ; Requires padding -- */
54 
55 #define crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES 16U
56 SODIUM_EXPORT
57 size_t crypto_secretbox_xsalsa20poly1305_boxzerobytes(void);
58 
59 #define crypto_secretbox_xsalsa20poly1305_ZEROBYTES \
60     (crypto_secretbox_xsalsa20poly1305_BOXZEROBYTES + \
61      crypto_secretbox_xsalsa20poly1305_MACBYTES)
62 SODIUM_EXPORT
63 size_t crypto_secretbox_xsalsa20poly1305_zerobytes(void);
64 
65 #ifdef __cplusplus
66 }
67 #endif
68 
69 #endif
70