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crypto_secretstream_xchacha20poly1305.h (3832B)

      1 #ifndef crypto_secretstream_xchacha20poly1305_H
      2 #define crypto_secretstream_xchacha20poly1305_H
      3 
      4 #include <stddef.h>
      5 
      6 #include "crypto_aead_xchacha20poly1305.h"
      7 #include "crypto_stream_chacha20.h"
      8 #include "export.h"
      9 
     10 #ifdef __cplusplus
     11 # ifdef __GNUC__
     12 #  pragma GCC diagnostic ignored "-Wlong-long"
     13 # endif
     14 extern "C" {
     15 #endif
     16 
     17 #define crypto_secretstream_xchacha20poly1305_ABYTES \
     18     (1U + crypto_aead_xchacha20poly1305_ietf_ABYTES)
     19 SODIUM_EXPORT
     20 size_t crypto_secretstream_xchacha20poly1305_abytes(void);
     21 
     22 #define crypto_secretstream_xchacha20poly1305_HEADERBYTES \
     23     crypto_aead_xchacha20poly1305_ietf_NPUBBYTES
     24 SODIUM_EXPORT
     25 size_t crypto_secretstream_xchacha20poly1305_headerbytes(void);
     26 
     27 #define crypto_secretstream_xchacha20poly1305_KEYBYTES \
     28     crypto_aead_xchacha20poly1305_ietf_KEYBYTES
     29 SODIUM_EXPORT
     30 size_t crypto_secretstream_xchacha20poly1305_keybytes(void);
     31 
     32 #define crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX \
     33     SODIUM_MIN(SODIUM_SIZE_MAX - crypto_secretstream_xchacha20poly1305_ABYTES, \
     34               (64ULL * ((1ULL << 32) - 2ULL)))
     35 SODIUM_EXPORT
     36 size_t crypto_secretstream_xchacha20poly1305_messagebytes_max(void);
     37 
     38 #define crypto_secretstream_xchacha20poly1305_TAG_MESSAGE 0x00
     39 SODIUM_EXPORT
     40 unsigned char crypto_secretstream_xchacha20poly1305_tag_message(void);
     41 
     42 #define crypto_secretstream_xchacha20poly1305_TAG_PUSH    0x01
     43 SODIUM_EXPORT
     44 unsigned char crypto_secretstream_xchacha20poly1305_tag_push(void);
     45 
     46 #define crypto_secretstream_xchacha20poly1305_TAG_REKEY   0x02
     47 SODIUM_EXPORT
     48 unsigned char crypto_secretstream_xchacha20poly1305_tag_rekey(void);
     49 
     50 #define crypto_secretstream_xchacha20poly1305_TAG_FINAL \
     51     (crypto_secretstream_xchacha20poly1305_TAG_PUSH | \
     52      crypto_secretstream_xchacha20poly1305_TAG_REKEY)
     53 SODIUM_EXPORT
     54 unsigned char crypto_secretstream_xchacha20poly1305_tag_final(void);
     55 
     56 typedef struct crypto_secretstream_xchacha20poly1305_state {
     57     unsigned char k[crypto_stream_chacha20_ietf_KEYBYTES];
     58     unsigned char nonce[crypto_stream_chacha20_ietf_NONCEBYTES];
     59     unsigned char _pad[8];
     60 } crypto_secretstream_xchacha20poly1305_state;
     61 
     62 SODIUM_EXPORT
     63 size_t crypto_secretstream_xchacha20poly1305_statebytes(void);
     64 
     65 SODIUM_EXPORT
     66 void crypto_secretstream_xchacha20poly1305_keygen
     67    (unsigned char k[crypto_secretstream_xchacha20poly1305_KEYBYTES])
     68             __attribute__ ((nonnull));
     69 
     70 SODIUM_EXPORT
     71 int crypto_secretstream_xchacha20poly1305_init_push
     72    (crypto_secretstream_xchacha20poly1305_state *state,
     73     unsigned char header[crypto_secretstream_xchacha20poly1305_HEADERBYTES],
     74     const unsigned char k[crypto_secretstream_xchacha20poly1305_KEYBYTES])
     75             __attribute__ ((nonnull));
     76 
     77 SODIUM_EXPORT
     78 int crypto_secretstream_xchacha20poly1305_push
     79    (crypto_secretstream_xchacha20poly1305_state *state,
     80     unsigned char *c, unsigned long long *clen_p,
     81     const unsigned char *m, unsigned long long mlen,
     82     const unsigned char *ad, unsigned long long adlen, unsigned char tag)
     83             __attribute__ ((nonnull(1)));
     84 
     85 SODIUM_EXPORT
     86 int crypto_secretstream_xchacha20poly1305_init_pull
     87    (crypto_secretstream_xchacha20poly1305_state *state,
     88     const unsigned char header[crypto_secretstream_xchacha20poly1305_HEADERBYTES],
     89     const unsigned char k[crypto_secretstream_xchacha20poly1305_KEYBYTES])
     90             __attribute__ ((nonnull));
     91 
     92 SODIUM_EXPORT
     93 int crypto_secretstream_xchacha20poly1305_pull
     94    (crypto_secretstream_xchacha20poly1305_state *state,
     95     unsigned char *m, unsigned long long *mlen_p, unsigned char *tag_p,
     96     const unsigned char *c, unsigned long long clen,
     97     const unsigned char *ad, unsigned long long adlen)
     98             __attribute__ ((nonnull(1)));
     99 
    100 SODIUM_EXPORT
    101 void crypto_secretstream_xchacha20poly1305_rekey
    102     (crypto_secretstream_xchacha20poly1305_state *state);
    103 
    104 #ifdef __cplusplus
    105 }
    106 #endif
    107 
    108 #endif