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      1 #ifndef crypto_auth_hmacsha256_H
      2 #define crypto_auth_hmacsha256_H
      3 
      4 #include <stddef.h>
      5 #include "crypto_hash_sha256.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_auth_hmacsha256_BYTES 32U
     16 SODIUM_EXPORT
     17 size_t crypto_auth_hmacsha256_bytes(void);
     18 
     19 #define crypto_auth_hmacsha256_KEYBYTES 32U
     20 SODIUM_EXPORT
     21 size_t crypto_auth_hmacsha256_keybytes(void);
     22 
     23 SODIUM_EXPORT
     24 int crypto_auth_hmacsha256(unsigned char *out,
     25                            const unsigned char *in,
     26                            unsigned long long inlen,
     27                            const unsigned char *k);
     28 
     29 SODIUM_EXPORT
     30 int crypto_auth_hmacsha256_verify(const unsigned char *h,
     31                                   const unsigned char *in,
     32                                   unsigned long long inlen,
     33                                   const unsigned char *k)
     34             __attribute__ ((warn_unused_result));
     35 
     36 /* ------------------------------------------------------------------------- */
     37 
     38 typedef struct crypto_auth_hmacsha256_state {
     39     crypto_hash_sha256_state ictx;
     40     crypto_hash_sha256_state octx;
     41 } crypto_auth_hmacsha256_state;
     42 
     43 SODIUM_EXPORT
     44 size_t crypto_auth_hmacsha256_statebytes(void);
     45 
     46 SODIUM_EXPORT
     47 int crypto_auth_hmacsha256_init(crypto_auth_hmacsha256_state *state,
     48                                 const unsigned char *key,
     49                                 size_t keylen);
     50 
     51 SODIUM_EXPORT
     52 int crypto_auth_hmacsha256_update(crypto_auth_hmacsha256_state *state,
     53                                   const unsigned char *in,
     54                                   unsigned long long inlen);
     55 
     56 SODIUM_EXPORT
     57 int crypto_auth_hmacsha256_final(crypto_auth_hmacsha256_state *state,
     58                                  unsigned char *out);
     59 
     60 
     61 SODIUM_EXPORT
     62 void crypto_auth_hmacsha256_keygen(unsigned char k[crypto_auth_hmacsha256_KEYBYTES]);
     63 
     64 #ifdef __cplusplus
     65 }
     66 #endif
     67 
     68 #endif
     69