]>
git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/ec/ecdh_kdf.c
2 * Copyright 2015-2020 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 * ECDH low level APIs are deprecated for public use, but still ok for
14 #include "internal/deprecated.h"
17 #include <openssl/core_names.h>
18 #include <openssl/ec.h>
19 #include <openssl/evp.h>
20 #include <openssl/kdf.h>
23 /* Key derivation function from X9.63/SECG */
24 int ossl_ecdh_kdf_X9_63(unsigned char *out
, size_t outlen
,
25 const unsigned char *Z
, size_t Zlen
,
26 const unsigned char *sinfo
, size_t sinfolen
,
28 OSSL_LIB_CTX
*libctx
, const char *propq
)
31 EVP_KDF_CTX
*kctx
= NULL
;
32 OSSL_PARAM params
[4], *p
= params
;
33 const char *mdname
= EVP_MD_name(md
);
34 EVP_KDF
*kdf
= EVP_KDF_fetch(libctx
, OSSL_KDF_NAME_X963KDF
, propq
);
36 if ((kctx
= EVP_KDF_CTX_new(kdf
)) != NULL
) {
37 *p
++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST
,
39 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY
,
41 *p
++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO
,
42 (void *)sinfo
, sinfolen
);
43 *p
= OSSL_PARAM_construct_end();
45 ret
= EVP_KDF_derive(kctx
, out
, outlen
, params
) > 0;
46 EVP_KDF_CTX_free(kctx
);
53 * The old name for ecdh_KDF_X9_63
54 * Retained for ABI compatibility
56 #ifndef OPENSSL_NO_DEPRECATED_3_0
57 int ECDH_KDF_X9_62(unsigned char *out
, size_t outlen
,
58 const unsigned char *Z
, size_t Zlen
,
59 const unsigned char *sinfo
, size_t sinfolen
,
62 return ossl_ecdh_kdf_X9_63(out
, outlen
, Z
, Zlen
, sinfo
, sinfolen
, md
, NULL
,