2 * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #ifndef OSSL_PROV_HMAC_DRBG_H
11 # define OSSL_PROV_HMAC_DRBG_H
14 #include <openssl/evp.h>
15 #include "prov/provider_util.h"
17 typedef struct drbg_hmac_st {
18 EVP_MAC_CTX *ctx; /* H(x) = HMAC_hash OR H(x) = KMAC */
19 PROV_DIGEST digest; /* H(x) = hash(x) */
21 unsigned char K[EVP_MAX_MD_SIZE];
22 unsigned char V[EVP_MAX_MD_SIZE];
25 int ossl_drbg_hmac_init(PROV_DRBG_HMAC *drbg,
26 const unsigned char *ent, size_t ent_len,
27 const unsigned char *nonce, size_t nonce_len,
28 const unsigned char *pstr, size_t pstr_len);
29 int ossl_drbg_hmac_generate(PROV_DRBG_HMAC *hmac,
30 unsigned char *out, size_t outlen,
31 const unsigned char *adin, size_t adin_len);
33 #endif /* OSSL_PROV_HMAC_DRBG_H */