libsodium (1.0.19)
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
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