Raise an error on syscall failure in tls_retry_write_records
[openssl.git] / providers / implementations / include / prov / hmac_drbg.h
1 /*
2  * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
3  *
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
8  */
9
10 #ifndef OSSL_PROV_HMAC_DRBG_H
11 # define OSSL_PROV_HMAC_DRBG_H
12 # pragma once
13
14 #include <openssl/evp.h>
15 #include "prov/provider_util.h"
16
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) */
20     size_t blocklen;
21     unsigned char K[EVP_MAX_MD_SIZE];
22     unsigned char V[EVP_MAX_MD_SIZE];
23 } PROV_DRBG_HMAC;
24
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);
32
33 #endif /* OSSL_PROV_HMAC_DRBG_H */