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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 */ |
32ab57cb SL |
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, | |
27 | const EVP_MD *md, | |
28 | OSSL_LIB_CTX *libctx, const char *propq) | |
0f113f3e | 29 | { |
7707526b | 30 | int ret = 0; |
8bbeaaa4 | 31 | EVP_KDF_CTX *kctx = NULL; |
7707526b P |
32 | OSSL_PARAM params[4], *p = params; |
33 | const char *mdname = EVP_MD_name(md); | |
5ccada09 | 34 | EVP_KDF *kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_X963KDF, propq); |
8bbeaaa4 | 35 | |
660c5344 | 36 | if ((kctx = EVP_KDF_CTX_new(kdf)) != NULL) { |
7707526b | 37 | *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, |
8b6ffd40 | 38 | (char *)mdname, 0); |
7707526b P |
39 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, |
40 | (void *)Z, Zlen); | |
41 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO, | |
42 | (void *)sinfo, sinfolen); | |
43 | *p = OSSL_PARAM_construct_end(); | |
8bbeaaa4 | 44 | |
660c5344 | 45 | ret = EVP_KDF_CTX_set_params(kctx, params) > 0 |
7707526b | 46 | && EVP_KDF_derive(kctx, out, outlen) > 0; |
660c5344 | 47 | EVP_KDF_CTX_free(kctx); |
7707526b P |
48 | } |
49 | EVP_KDF_free(kdf); | |
8bbeaaa4 | 50 | return ret; |
0f113f3e | 51 | } |
ffd89124 AS |
52 | |
53 | /*- | |
54 | * The old name for ecdh_KDF_X9_63 | |
55 | * Retained for ABI compatibility | |
56 | */ | |
936c2b9e | 57 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
ffd89124 AS |
58 | int ECDH_KDF_X9_62(unsigned char *out, size_t outlen, |
59 | const unsigned char *Z, size_t Zlen, | |
60 | const unsigned char *sinfo, size_t sinfolen, | |
61 | const EVP_MD *md) | |
62 | { | |
32ab57cb SL |
63 | return ossl_ecdh_kdf_X9_63(out, outlen, Z, Zlen, sinfo, sinfolen, md, NULL, |
64 | NULL); | |
ffd89124 | 65 | } |
9453b196 | 66 | #endif |