]>
git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/dh/dh_kdf.c
2 * Copyright 2013-2020 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
11 * DH low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
18 #ifndef OPENSSL_NO_CMS
20 # include <openssl/core_names.h>
21 # include <openssl/dh.h>
22 # include <openssl/evp.h>
23 # include <openssl/asn1.h>
24 # include <openssl/kdf.h>
25 # include <internal/provider.h>
27 int DH_KDF_X9_42(unsigned char *out
, size_t outlen
,
28 const unsigned char *Z
, size_t Zlen
,
30 const unsigned char *ukm
, size_t ukmlen
, const EVP_MD
*md
)
33 EVP_KDF_CTX
*kctx
= NULL
;
36 OSSL_PARAM params
[5], *p
= params
;
37 const char *mdname
= EVP_MD_name(md
);
38 const OSSL_PROVIDER
*prov
= EVP_MD_provider(md
);
39 OPENSSL_CTX
*provctx
= ossl_provider_library_context(prov
);
41 nid
= OBJ_obj2nid(key_oid
);
44 oid_sn
= OBJ_nid2sn(nid
);
48 kdf
= EVP_KDF_fetch(provctx
, OSSL_KDF_NAME_X942KDF
, NULL
);
49 if ((kctx
= EVP_KDF_CTX_new(kdf
)) == NULL
)
51 *p
++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST
,
53 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY
,
54 (unsigned char *)Z
, Zlen
);
56 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_UKM
,
57 (unsigned char *)ukm
, ukmlen
);
58 *p
++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_CEK_ALG
,
60 *p
= OSSL_PARAM_construct_end();
61 ret
= EVP_KDF_CTX_set_params(kctx
, params
) > 0
62 && EVP_KDF_derive(kctx
, out
, outlen
) > 0;
64 EVP_KDF_CTX_free(kctx
);
68 #endif /* OPENSSL_NO_CMS */