1 /*
2 * Copyright (C) 2022-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecdh_openssl.h"
17
18 #include <openssl/bio.h>
19 #include <openssl/err.h>
20
21 #include "algorithm_parameter.h"
22 #include "openssl_adapter.h"
23 #include "openssl_class.h"
24 #include "openssl_common.h"
25 #include "log.h"
26 #include "memory.h"
27 #include "utils.h"
28
29 typedef struct {
30 HcfKeyAgreementSpi base;
31 } HcfKeyAgreementSpiEcdhOpensslImpl;
32
AssignEcKeyToPkey(EC_KEY * ecKey)33 static EVP_PKEY *AssignEcKeyToPkey(EC_KEY *ecKey)
34 {
35 EVP_PKEY *pKey = OpensslEvpPkeyNew();
36 if (pKey == NULL) {
37 HcfPrintOpensslError();
38 return NULL;
39 }
40 if (OpensslEvpPkeyAssignEcKey(pKey, ecKey) != HCF_OPENSSL_SUCCESS) {
41 HcfPrintOpensslError();
42 OpensslEvpPkeyFree(pKey);
43 return NULL;
44 }
45 return pKey;
46 }
47
NewPKeyByEccPubKey(HcfOpensslEccPubKey * publicKey)48 static EVP_PKEY *NewPKeyByEccPubKey(HcfOpensslEccPubKey *publicKey)
49 {
50 EC_KEY *ecKey = OpensslEcKeyDup(publicKey->ecKey);
51 if (ecKey == NULL) {
52 return NULL;
53 }
54 EVP_PKEY *res = AssignEcKeyToPkey(ecKey);
55 if (res == NULL) {
56 OpensslEcKeyFree(ecKey);
57 }
58 return res;
59 }
60
NewPKeyByEccPriKey(HcfOpensslEccPriKey * privateKey)61 static EVP_PKEY *NewPKeyByEccPriKey(HcfOpensslEccPriKey *privateKey)
62 {
63 EC_KEY *ecKey = OpensslEcKeyDup(privateKey->ecKey);
64 if (ecKey == NULL) {
65 return NULL;
66 }
67 EVP_PKEY *res = AssignEcKeyToPkey(ecKey);
68 if (res == NULL) {
69 OpensslEcKeyFree(ecKey);
70 }
71 return res;
72 }
73
GetEcdhClass(void)74 static const char *GetEcdhClass(void)
75 {
76 return "HcfKeyAgreement.HcfKeyAgreementSpiEcdhOpensslImpl";
77 }
78
DestroyEcdh(HcfObjectBase * self)79 static void DestroyEcdh(HcfObjectBase *self)
80 {
81 if (self == NULL) {
82 return;
83 }
84 if (!HcfIsClassMatch(self, GetEcdhClass())) {
85 return;
86 }
87 HcfFree(self);
88 }
89
EngineGenerateSecret(HcfKeyAgreementSpi * self,HcfPriKey * priKey,HcfPubKey * pubKey,HcfBlob * returnSecret)90 static HcfResult EngineGenerateSecret(HcfKeyAgreementSpi *self, HcfPriKey *priKey,
91 HcfPubKey *pubKey, HcfBlob *returnSecret)
92 {
93 if ((self == NULL) || (priKey == NULL) || (pubKey == NULL) || (returnSecret == NULL)) {
94 LOGE("Invalid input parameter.");
95 return HCF_INVALID_PARAMS;
96 }
97 if ((!HcfIsClassMatch((HcfObjectBase *)self, GetEcdhClass())) ||
98 (!HcfIsClassMatch((HcfObjectBase *)priKey, HCF_OPENSSL_ECC_PRI_KEY_CLASS)) ||
99 (!HcfIsClassMatch((HcfObjectBase *)pubKey, HCF_OPENSSL_ECC_PUB_KEY_CLASS))) {
100 return HCF_INVALID_PARAMS;
101 }
102
103 EVP_PKEY *priPKey = NewPKeyByEccPriKey((HcfOpensslEccPriKey *)priKey);
104 if (priPKey == NULL) {
105 LOGD("[error] Gen EVP_PKEY priKey failed");
106 return HCF_ERR_CRYPTO_OPERATION;
107 }
108 EVP_PKEY *pubPKey = NewPKeyByEccPubKey((HcfOpensslEccPubKey *)pubKey);
109 if (pubPKey == NULL) {
110 LOGD("[error] Gen EVP_PKEY pubKey failed");
111 EVP_PKEY_free(priPKey);
112 return HCF_ERR_CRYPTO_OPERATION;
113 }
114
115 HcfResult res = KeyDerive(priPKey, pubPKey, returnSecret);
116 OpensslEvpPkeyFree(priPKey);
117 OpensslEvpPkeyFree(pubPKey);
118 return res;
119 }
120
HcfKeyAgreementSpiEcdhCreate(HcfKeyAgreementParams * params,HcfKeyAgreementSpi ** returnObj)121 HcfResult HcfKeyAgreementSpiEcdhCreate(HcfKeyAgreementParams *params, HcfKeyAgreementSpi **returnObj)
122 {
123 (void)params;
124 if ((params == NULL) || (returnObj == NULL)) {
125 LOGE("Invalid input parameter.");
126 return HCF_INVALID_PARAMS;
127 }
128
129 HcfKeyAgreementSpiEcdhOpensslImpl *returnImpl = (HcfKeyAgreementSpiEcdhOpensslImpl *)HcfMalloc(
130 sizeof(HcfKeyAgreementSpiEcdhOpensslImpl), 0);
131 if (returnImpl == NULL) {
132 LOGE("Failed to allocate returnImpl memroy!");
133 return HCF_ERR_MALLOC;
134 }
135 returnImpl->base.base.getClass = GetEcdhClass;
136 returnImpl->base.base.destroy = DestroyEcdh;
137 returnImpl->base.engineGenerateSecret = EngineGenerateSecret;
138
139 *returnObj = (HcfKeyAgreementSpi *)returnImpl;
140 return HCF_SUCCESS;
141 }
142