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crypto_kdf_hkdf_sha256.h (2343B)

      1 #ifndef crypto_kdf_hkdf_sha256_H
      2 #define crypto_kdf_hkdf_sha256_H
      3 
      4 #include <stddef.h>
      5 #include <stdint.h>
      6 #include <stdlib.h>
      7 
      8 #include "crypto_kdf.h"
      9 #include "crypto_auth_hmacsha256.h"
     10 #include "export.h"
     11 
     12 #ifdef __cplusplus
     13 # ifdef __GNUC__
     14 #  pragma GCC diagnostic ignored "-Wlong-long"
     15 # endif
     16 extern "C" {
     17 #endif
     18 
     19 #define crypto_kdf_hkdf_sha256_KEYBYTES crypto_auth_hmacsha256_BYTES
     20 SODIUM_EXPORT
     21 size_t crypto_kdf_hkdf_sha256_keybytes(void);
     22 
     23 #define crypto_kdf_hkdf_sha256_BYTES_MIN 0U
     24 SODIUM_EXPORT
     25 size_t crypto_kdf_hkdf_sha256_bytes_min(void);
     26 
     27 #define crypto_kdf_hkdf_sha256_BYTES_MAX (0xff * crypto_auth_hmacsha256_BYTES)
     28 SODIUM_EXPORT
     29 size_t crypto_kdf_hkdf_sha256_bytes_max(void);
     30 
     31 SODIUM_EXPORT
     32 int crypto_kdf_hkdf_sha256_extract(unsigned char prk[crypto_kdf_hkdf_sha256_KEYBYTES],
     33                                    const unsigned char *salt, size_t salt_len,
     34                                    const unsigned char *ikm, size_t ikm_len)
     35             __attribute__ ((nonnull(4)));
     36 
     37 SODIUM_EXPORT
     38 void crypto_kdf_hkdf_sha256_keygen(unsigned char prk[crypto_kdf_hkdf_sha256_KEYBYTES]);
     39 
     40 SODIUM_EXPORT
     41 int crypto_kdf_hkdf_sha256_expand(unsigned char *out, size_t out_len,
     42                                   const char *ctx, size_t ctx_len,
     43                                   const unsigned char prk[crypto_kdf_hkdf_sha256_KEYBYTES])
     44             __attribute__ ((nonnull(1)));
     45 
     46 /* ------------------------------------------------------------------------- */
     47 
     48 typedef struct crypto_kdf_hkdf_sha256_state {
     49     crypto_auth_hmacsha256_state st;
     50 } crypto_kdf_hkdf_sha256_state;
     51 
     52 SODIUM_EXPORT
     53 size_t crypto_kdf_hkdf_sha256_statebytes(void);
     54 
     55 SODIUM_EXPORT
     56 int crypto_kdf_hkdf_sha256_extract_init(crypto_kdf_hkdf_sha256_state *state,
     57                                         const unsigned char *salt, size_t salt_len)
     58             __attribute__ ((nonnull(1)));
     59 
     60 SODIUM_EXPORT
     61 int crypto_kdf_hkdf_sha256_extract_update(crypto_kdf_hkdf_sha256_state *state,
     62                                           const unsigned char *ikm, size_t ikm_len)
     63             __attribute__ ((nonnull));
     64 
     65 SODIUM_EXPORT
     66 int crypto_kdf_hkdf_sha256_extract_final(crypto_kdf_hkdf_sha256_state *state,
     67                                          unsigned char prk[crypto_kdf_hkdf_sha256_KEYBYTES])
     68             __attribute__ ((nonnull));
     69 
     70 #ifdef __cplusplus
     71 }
     72 #endif
     73 
     74 #endif