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Commit | Line | Data |
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25af7a5d | 1 | /* |
33388b44 | 2 | * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved. |
25af7a5d | 3 | * |
a7f182b7 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
4f22f405 RS |
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 | |
25af7a5d DSH |
8 | */ |
9 | ||
5e3f9aa4 P |
10 | /* |
11 | * ECDH low level APIs are deprecated for public use, but still ok for | |
12 | * internal use. | |
13 | */ | |
14 | #include "internal/deprecated.h" | |
15 | ||
25af7a5d | 16 | #include <string.h> |
7707526b | 17 | #include <openssl/core_names.h> |
768c53e1 | 18 | #include <openssl/ec.h> |
25af7a5d | 19 | #include <openssl/evp.h> |
8bbeaaa4 | 20 | #include <openssl/kdf.h> |
706457b7 | 21 | #include "ec_local.h" |
25af7a5d | 22 | |
ffd89124 | 23 | /* Key derivation function from X9.63/SECG */ |
ffd89124 | 24 | int ecdh_KDF_X9_63(unsigned char *out, size_t outlen, |
0f113f3e MC |
25 | const unsigned char *Z, size_t Zlen, |
26 | const unsigned char *sinfo, size_t sinfolen, | |
27 | const EVP_MD *md) | |
28 | { | |
7707526b | 29 | int ret = 0; |
8bbeaaa4 | 30 | EVP_KDF_CTX *kctx = NULL; |
7707526b P |
31 | OSSL_PARAM params[4], *p = params; |
32 | const char *mdname = EVP_MD_name(md); | |
64115f05 | 33 | EVP_KDF *kdf = EVP_KDF_fetch(NULL, OSSL_KDF_NAME_X963KDF, NULL); |
8bbeaaa4 | 34 | |
660c5344 | 35 | if ((kctx = EVP_KDF_CTX_new(kdf)) != NULL) { |
7707526b | 36 | *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, |
8b6ffd40 | 37 | (char *)mdname, 0); |
7707526b P |
38 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, |
39 | (void *)Z, Zlen); | |
40 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO, | |
41 | (void *)sinfo, sinfolen); | |
42 | *p = OSSL_PARAM_construct_end(); | |
8bbeaaa4 | 43 | |
660c5344 | 44 | ret = EVP_KDF_CTX_set_params(kctx, params) > 0 |
7707526b | 45 | && EVP_KDF_derive(kctx, out, outlen) > 0; |
660c5344 | 46 | EVP_KDF_CTX_free(kctx); |
7707526b P |
47 | } |
48 | EVP_KDF_free(kdf); | |
8bbeaaa4 | 49 | return ret; |
0f113f3e | 50 | } |
ffd89124 AS |
51 | |
52 | /*- | |
53 | * The old name for ecdh_KDF_X9_63 | |
54 | * Retained for ABI compatibility | |
55 | */ | |
936c2b9e | 56 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
ffd89124 AS |
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, | |
60 | const EVP_MD *md) | |
61 | { | |
62 | return ecdh_KDF_X9_63(out, outlen, Z, Zlen, sinfo, sinfolen, md); | |
63 | } | |
9453b196 | 64 | #endif |