libsodium (1.0.19)
1 #ifndef crypto_stream_salsa20_H
2 #define crypto_stream_salsa20_H
3
4 /*
5 * WARNING: This is just a stream cipher. It is NOT authenticated encryption.
6 * While it provides some protection against eavesdropping, it does NOT
7 * provide any security against active attacks.
8 * Unless you know what you're doing, what you are looking for is probably
9 * the crypto_box functions.
10 */
11
12 #include <stddef.h>
13 #include <stdint.h>
14 #include "export.h"
15
16 #ifdef __cplusplus
17 # ifdef __GNUC__
18 # pragma GCC diagnostic ignored "-Wlong-long"
19 # endif
20 extern "C" {
21 #endif
22
23 #define crypto_stream_salsa20_KEYBYTES 32U
24 SODIUM_EXPORT
25 size_t crypto_stream_salsa20_keybytes(void);
26
27 #define crypto_stream_salsa20_NONCEBYTES 8U
28 SODIUM_EXPORT
29 size_t crypto_stream_salsa20_noncebytes(void);
30
31 #define crypto_stream_salsa20_MESSAGEBYTES_MAX SODIUM_SIZE_MAX
32 SODIUM_EXPORT
33 size_t crypto_stream_salsa20_messagebytes_max(void);
34
35 SODIUM_EXPORT
36 int crypto_stream_salsa20(unsigned char *c, unsigned long long clen,
37 const unsigned char *n, const unsigned char *k)
38 __attribute__ ((nonnull));
39
40 SODIUM_EXPORT
41 int crypto_stream_salsa20_xor(unsigned char *c, const unsigned char *m,
42 unsigned long long mlen, const unsigned char *n,
43 const unsigned char *k)
44 __attribute__ ((nonnull));
45
46 SODIUM_EXPORT
47 int crypto_stream_salsa20_xor_ic(unsigned char *c, const unsigned char *m,
48 unsigned long long mlen,
49 const unsigned char *n, uint64_t ic,
50 const unsigned char *k)
51 __attribute__ ((nonnull));
52
53 SODIUM_EXPORT
54 void crypto_stream_salsa20_keygen(unsigned char k[crypto_stream_salsa20_KEYBYTES])
55 __attribute__ ((nonnull));
56
57 #ifdef __cplusplus
58 }
59 #endif
60
61 #endif
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