2 * Copyright 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
10 #include <openssl/crypto.h>
11 #include <openssl/kdf.h>
12 #include <openssl/core_dispatch.h>
13 #include <openssl/core_names.h>
14 #include <openssl/params.h>
15 #include "prov/implementations.h"
16 #include "prov/provider_ctx.h"
17 #include "prov/kdfexchange.h"
19 static OSSL_FUNC_keyexch_newctx_fn kdf_tls1_prf_newctx;
20 static OSSL_FUNC_keyexch_newctx_fn kdf_hkdf_newctx;
21 static OSSL_FUNC_keyexch_newctx_fn kdf_scrypt_newctx;
22 static OSSL_FUNC_keyexch_init_fn kdf_init;
23 static OSSL_FUNC_keyexch_derive_fn kdf_derive;
24 static OSSL_FUNC_keyexch_freectx_fn kdf_freectx;
25 static OSSL_FUNC_keyexch_dupctx_fn kdf_dupctx;
26 static OSSL_FUNC_keyexch_set_ctx_params_fn kdf_set_ctx_params;
27 static OSSL_FUNC_keyexch_settable_ctx_params_fn kdf_tls1_prf_settable_ctx_params;
28 static OSSL_FUNC_keyexch_settable_ctx_params_fn kdf_hkdf_settable_ctx_params;
29 static OSSL_FUNC_keyexch_settable_ctx_params_fn kdf_scrypt_settable_ctx_params;
37 #define KDF_NEWCTX(funcname, kdfname) \
38 static void *kdf_##funcname##_newctx(void *provctx) \
40 PROV_KDF_CTX *kdfctx = OPENSSL_zalloc(sizeof(PROV_KDF_CTX)); \
41 EVP_KDF *kdf = NULL; \
46 kdfctx->provctx = provctx; \
48 kdf = EVP_KDF_fetch(PROV_LIBRARY_CONTEXT_OF(provctx), kdfname, NULL); \
51 kdfctx->kdfctx = EVP_KDF_CTX_new(kdf); \
54 if (kdfctx->kdfctx == NULL) \
59 OPENSSL_free(kdfctx); \
63 KDF_NEWCTX(tls1_prf, "TLS1-PRF")
64 KDF_NEWCTX(hkdf, "HKDF")
65 KDF_NEWCTX(scrypt, "SCRYPT")
67 static int kdf_init(void *vpkdfctx, void *vkdf)
69 PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
71 if (pkdfctx == NULL || vkdf == NULL || !kdf_data_up_ref(vkdf))
73 pkdfctx->kdfdata = vkdf;
78 static int kdf_derive(void *vpkdfctx, unsigned char *secret, size_t *secretlen,
81 PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
83 return EVP_KDF_derive(pkdfctx->kdfctx, secret, *secretlen);
86 static void kdf_freectx(void *vpkdfctx)
88 PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
90 EVP_KDF_CTX_free(pkdfctx->kdfctx);
91 kdf_data_free(pkdfctx->kdfdata);
93 OPENSSL_free(pkdfctx);
96 static void *kdf_dupctx(void *vpkdfctx)
98 PROV_KDF_CTX *srcctx = (PROV_KDF_CTX *)vpkdfctx;
101 dstctx = OPENSSL_zalloc(sizeof(*srcctx));
107 dstctx->kdfctx = EVP_KDF_CTX_dup(srcctx->kdfctx);
108 if (dstctx->kdfctx == NULL) {
109 OPENSSL_free(dstctx);
112 if (!kdf_data_up_ref(dstctx->kdfdata)) {
113 EVP_KDF_CTX_free(dstctx->kdfctx);
114 OPENSSL_free(dstctx);
121 static int kdf_set_ctx_params(void *vpkdfctx, const OSSL_PARAM params[])
123 PROV_KDF_CTX *pkdfctx = (PROV_KDF_CTX *)vpkdfctx;
125 return EVP_KDF_CTX_set_params(pkdfctx->kdfctx, params);
128 #define KDF_SETTABLE_CTX_PARAMS(funcname, kdfname) \
129 static const OSSL_PARAM *kdf_##funcname##_settable_ctx_params(void) \
132 * TODO(3.0): FIXME FIXME!! These settable_ctx_params functions should \
133 * should have a provctx argument so we can get hold of the libctx. \
135 EVP_KDF *kdf = EVP_KDF_fetch(NULL, kdfname, NULL); \
136 const OSSL_PARAM *params; \
141 params = EVP_KDF_settable_ctx_params(kdf); \
147 KDF_SETTABLE_CTX_PARAMS(tls1_prf, "TLS1-PRF")
148 KDF_SETTABLE_CTX_PARAMS(hkdf, "HKDF")
149 KDF_SETTABLE_CTX_PARAMS(scrypt, "SCRYPT")
152 #define KDF_KEYEXCH_FUNCTIONS(funcname) \
153 const OSSL_DISPATCH kdf_##funcname##_keyexch_functions[] = { \
154 { OSSL_FUNC_KEYEXCH_NEWCTX, (void (*)(void))kdf_##funcname##_newctx }, \
155 { OSSL_FUNC_KEYEXCH_INIT, (void (*)(void))kdf_init }, \
156 { OSSL_FUNC_KEYEXCH_DERIVE, (void (*)(void))kdf_derive }, \
157 { OSSL_FUNC_KEYEXCH_FREECTX, (void (*)(void))kdf_freectx }, \
158 { OSSL_FUNC_KEYEXCH_DUPCTX, (void (*)(void))kdf_dupctx }, \
159 { OSSL_FUNC_KEYEXCH_SET_CTX_PARAMS, (void (*)(void))kdf_set_ctx_params }, \
160 { OSSL_FUNC_KEYEXCH_SETTABLE_CTX_PARAMS, \
161 (void (*)(void))kdf_##funcname##_settable_ctx_params }, \
165 KDF_KEYEXCH_FUNCTIONS(tls1_prf)
166 KDF_KEYEXCH_FUNCTIONS(hkdf)
167 KDF_KEYEXCH_FUNCTIONS(scrypt)