| 1 | /* |
1 | /* |
| 2 | hkdf.h -- RFC 5869 HKDF implementation |
2 | hkdf.h -- RFC 5869 HKDF implementation |
| 3 | Copyright (C) 2013 Marc Lehmann <gvpe@schmorp.de> |
3 | Copyright (C) 2013,2016 Marc Lehmann <gvpe@schmorp.de> |
| 4 | |
4 | |
| 5 | This file is part of GVPE. |
5 | This file is part of GVPE. |
| 6 | |
6 | |
| 7 | GVPE is free software; you can redistribute it and/or modify it |
7 | GVPE is free software; you can redistribute it and/or modify it |
| 8 | under the terms of the GNU General Public License as published by the |
8 | under the terms of the GNU General Public License as published by the |
| … | |
… | |
| 32 | #ifndef HKDF_H__ |
32 | #ifndef HKDF_H__ |
| 33 | #define HKDF_H__ |
33 | #define HKDF_H__ |
| 34 | |
34 | |
| 35 | #include "global.h" |
35 | #include "global.h" |
| 36 | |
36 | |
|
|
37 | #include "crypto.h" |
|
|
38 | |
| 37 | // see RFC5869 |
39 | // see RFC5869 |
| 38 | struct hkdf |
40 | struct hkdf |
| 39 | { |
41 | { |
| 40 | HMAC_CTX ctx; |
42 | hmac ctx; |
| 41 | u8 prk[EVP_MAX_MD_SIZE]; |
43 | u8 prk[EVP_MAX_MD_SIZE]; |
| 42 | |
44 | |
| 43 | hkdf (const void *salt = 0, int len = 0, const EVP_MD *xtr_hash = EVP_sha512 ()); |
45 | hkdf (const void *salt = 0, int len = 0, const EVP_MD *xtr_hash = EVP_sha512 ()) |
| 44 | ~hkdf (); |
46 | { |
|
|
47 | ctx.init (salt, len, xtr_hash); |
|
|
48 | } |
| 45 | |
49 | |
| 46 | void extract (const void *ikm, int len); |
50 | void extract (const void *ikm, int len); |
| 47 | void extract_done (const EVP_MD *prf_hash = 0); |
51 | void extract_done (const EVP_MD *prf_hash = 0); |
| 48 | |
52 | |
| 49 | void expand (void *okm, int len, const void *info = 0, int infolen = 0); |
53 | void expand (void *okm, int len, const void *info = 0, int infolen = 0); |
