/src/openssl/crypto/ec/ecdh_kdf.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright 2015-2021 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 | | /* |
11 | | * ECDH low level APIs are deprecated for public use, but still ok for |
12 | | * internal use. |
13 | | */ |
14 | | #include "internal/deprecated.h" |
15 | | |
16 | | #include <string.h> |
17 | | #include <openssl/core_names.h> |
18 | | #include <openssl/ec.h> |
19 | | #include <openssl/evp.h> |
20 | | #include <openssl/kdf.h> |
21 | | #include "ec_local.h" |
22 | | |
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, |
27 | | const EVP_MD *md, |
28 | | OSSL_LIB_CTX *libctx, const char *propq) |
29 | 0 | { |
30 | 0 | int ret = 0; |
31 | 0 | EVP_KDF_CTX *kctx = NULL; |
32 | 0 | OSSL_PARAM params[4], *p = params; |
33 | 0 | const char *mdname = EVP_MD_get0_name(md); |
34 | 0 | EVP_KDF *kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_X963KDF, propq); |
35 | |
|
36 | 0 | if ((kctx = EVP_KDF_CTX_new(kdf)) != NULL) { |
37 | 0 | *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, |
38 | 0 | (char *)mdname, 0); |
39 | 0 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, |
40 | 0 | (void *)Z, Zlen); |
41 | 0 | *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO, |
42 | 0 | (void *)sinfo, sinfolen); |
43 | 0 | *p = OSSL_PARAM_construct_end(); |
44 | |
|
45 | 0 | ret = EVP_KDF_derive(kctx, out, outlen, params) > 0; |
46 | 0 | EVP_KDF_CTX_free(kctx); |
47 | 0 | } |
48 | 0 | EVP_KDF_free(kdf); |
49 | 0 | return ret; |
50 | 0 | } |
51 | | |
52 | | /*- |
53 | | * The old name for ecdh_KDF_X9_63 |
54 | | * Retained for ABI compatibility |
55 | | */ |
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, |
60 | | const EVP_MD *md) |
61 | 0 | { |
62 | 0 | return ossl_ecdh_kdf_X9_63(out, outlen, Z, Zlen, sinfo, sinfolen, md, NULL, |
63 | 0 | NULL); |
64 | 0 | } |
65 | | #endif |