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1 | /** @file\r |
2 | AEAD (AES-GCM) Wrapper Implementation over OpenSSL.\r | |
3 | \r | |
4 | RFC 5116 - An Interface and Algorithms for Authenticated Encryption\r | |
5 | NIST SP800-38d - Cipher Modes of Operation: Galois / Counter Mode(GCM) and GMAC\r | |
6 | \r | |
7 | Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>\r | |
8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
9 | \r | |
10 | **/\r | |
11 | \r | |
12 | #include "InternalCryptLib.h"\r | |
13 | #include <openssl/aes.h>\r | |
14 | #include <openssl/evp.h>\r | |
15 | \r | |
16 | /**\r | |
17 | Performs AEAD AES-GCM authenticated encryption on a data buffer and additional authenticated data (AAD).\r | |
18 | \r | |
19 | IvSize must be 12, otherwise FALSE is returned.\r | |
20 | KeySize must be 16, 24 or 32, otherwise FALSE is returned.\r | |
21 | TagSize must be 12, 13, 14, 15, 16, otherwise FALSE is returned.\r | |
22 | \r | |
23 | @param[in] Key Pointer to the encryption key.\r | |
24 | @param[in] KeySize Size of the encryption key in bytes.\r | |
25 | @param[in] Iv Pointer to the IV value.\r | |
26 | @param[in] IvSize Size of the IV value in bytes.\r | |
27 | @param[in] AData Pointer to the additional authenticated data (AAD).\r | |
28 | @param[in] ADataSize Size of the additional authenticated data (AAD) in bytes.\r | |
29 | @param[in] DataIn Pointer to the input data buffer to be encrypted.\r | |
30 | @param[in] DataInSize Size of the input data buffer in bytes.\r | |
31 | @param[out] TagOut Pointer to a buffer that receives the authentication tag output.\r | |
32 | @param[in] TagSize Size of the authentication tag in bytes.\r | |
33 | @param[out] DataOut Pointer to a buffer that receives the encryption output.\r | |
34 | @param[out] DataOutSize Size of the output data buffer in bytes.\r | |
35 | \r | |
36 | @retval TRUE AEAD AES-GCM authenticated encryption succeeded.\r | |
37 | @retval FALSE AEAD AES-GCM authenticated encryption failed.\r | |
38 | \r | |
39 | **/\r | |
40 | BOOLEAN\r | |
41 | EFIAPI\r | |
42 | AeadAesGcmEncrypt (\r | |
43 | IN CONST UINT8 *Key,\r | |
44 | IN UINTN KeySize,\r | |
45 | IN CONST UINT8 *Iv,\r | |
46 | IN UINTN IvSize,\r | |
47 | IN CONST UINT8 *AData,\r | |
48 | IN UINTN ADataSize,\r | |
49 | IN CONST UINT8 *DataIn,\r | |
50 | IN UINTN DataInSize,\r | |
51 | OUT UINT8 *TagOut,\r | |
52 | IN UINTN TagSize,\r | |
53 | OUT UINT8 *DataOut,\r | |
54 | OUT UINTN *DataOutSize\r | |
55 | )\r | |
56 | {\r | |
57 | EVP_CIPHER_CTX *Ctx;\r | |
58 | CONST EVP_CIPHER *Cipher;\r | |
59 | UINTN TempOutSize;\r | |
60 | BOOLEAN RetValue;\r | |
61 | \r | |
62 | if (DataInSize > INT_MAX) {\r | |
63 | return FALSE;\r | |
64 | }\r | |
65 | \r | |
66 | if (ADataSize > INT_MAX) {\r | |
67 | return FALSE;\r | |
68 | }\r | |
69 | \r | |
70 | if (IvSize != 12) {\r | |
71 | return FALSE;\r | |
72 | }\r | |
73 | \r | |
74 | switch (KeySize) {\r | |
75 | case 16:\r | |
76 | Cipher = EVP_aes_128_gcm ();\r | |
77 | break;\r | |
78 | case 24:\r | |
79 | Cipher = EVP_aes_192_gcm ();\r | |
80 | break;\r | |
81 | case 32:\r | |
82 | Cipher = EVP_aes_256_gcm ();\r | |
83 | break;\r | |
84 | default:\r | |
85 | return FALSE;\r | |
86 | }\r | |
87 | \r | |
88 | if ((TagSize != 12) && (TagSize != 13) && (TagSize != 14) && (TagSize != 15) && (TagSize != 16)) {\r | |
89 | return FALSE;\r | |
90 | }\r | |
91 | \r | |
92 | if (DataOutSize != NULL) {\r | |
93 | if ((*DataOutSize > INT_MAX) || (*DataOutSize < DataInSize)) {\r | |
94 | return FALSE;\r | |
95 | }\r | |
96 | }\r | |
97 | \r | |
98 | Ctx = EVP_CIPHER_CTX_new ();\r | |
99 | if (Ctx == NULL) {\r | |
100 | return FALSE;\r | |
101 | }\r | |
102 | \r | |
103 | RetValue = (BOOLEAN)EVP_EncryptInit_ex (Ctx, Cipher, NULL, NULL, NULL);\r | |
104 | if (!RetValue) {\r | |
105 | goto Done;\r | |
106 | }\r | |
107 | \r | |
108 | RetValue = (BOOLEAN)EVP_CIPHER_CTX_ctrl (Ctx, EVP_CTRL_GCM_SET_IVLEN, (INT32)IvSize, NULL);\r | |
109 | if (!RetValue) {\r | |
110 | goto Done;\r | |
111 | }\r | |
112 | \r | |
113 | RetValue = (BOOLEAN)EVP_EncryptInit_ex (Ctx, NULL, NULL, Key, Iv);\r | |
114 | if (!RetValue) {\r | |
115 | goto Done;\r | |
116 | }\r | |
117 | \r | |
118 | RetValue = (BOOLEAN)EVP_EncryptUpdate (Ctx, NULL, (INT32 *)&TempOutSize, AData, (INT32)ADataSize);\r | |
119 | if (!RetValue) {\r | |
120 | goto Done;\r | |
121 | }\r | |
122 | \r | |
123 | RetValue = (BOOLEAN)EVP_EncryptUpdate (Ctx, DataOut, (INT32 *)&TempOutSize, DataIn, (INT32)DataInSize);\r | |
124 | if (!RetValue) {\r | |
125 | goto Done;\r | |
126 | }\r | |
127 | \r | |
128 | RetValue = (BOOLEAN)EVP_EncryptFinal_ex (Ctx, DataOut, (INT32 *)&TempOutSize);\r | |
129 | if (!RetValue) {\r | |
130 | goto Done;\r | |
131 | }\r | |
132 | \r | |
133 | RetValue = (BOOLEAN)EVP_CIPHER_CTX_ctrl (Ctx, EVP_CTRL_GCM_GET_TAG, (INT32)TagSize, (VOID *)TagOut);\r | |
134 | \r | |
135 | Done:\r | |
136 | EVP_CIPHER_CTX_free (Ctx);\r | |
137 | if (!RetValue) {\r | |
138 | return RetValue;\r | |
139 | }\r | |
140 | \r | |
141 | if (DataOutSize != NULL) {\r | |
142 | *DataOutSize = DataInSize;\r | |
143 | }\r | |
144 | \r | |
145 | return RetValue;\r | |
146 | }\r | |
147 | \r | |
148 | /**\r | |
149 | Performs AEAD AES-GCM authenticated decryption on a data buffer and additional authenticated data (AAD).\r | |
150 | \r | |
151 | IvSize must be 12, otherwise FALSE is returned.\r | |
152 | KeySize must be 16, 24 or 32, otherwise FALSE is returned.\r | |
153 | TagSize must be 12, 13, 14, 15, 16, otherwise FALSE is returned.\r | |
154 | If additional authenticated data verification fails, FALSE is returned.\r | |
155 | \r | |
156 | @param[in] Key Pointer to the encryption key.\r | |
157 | @param[in] KeySize Size of the encryption key in bytes.\r | |
158 | @param[in] Iv Pointer to the IV value.\r | |
159 | @param[in] IvSize Size of the IV value in bytes.\r | |
160 | @param[in] AData Pointer to the additional authenticated data (AAD).\r | |
161 | @param[in] ADataSize Size of the additional authenticated data (AAD) in bytes.\r | |
162 | @param[in] DataIn Pointer to the input data buffer to be decrypted.\r | |
163 | @param[in] DataInSize Size of the input data buffer in bytes.\r | |
164 | @param[in] Tag Pointer to a buffer that contains the authentication tag.\r | |
165 | @param[in] TagSize Size of the authentication tag in bytes.\r | |
166 | @param[out] DataOut Pointer to a buffer that receives the decryption output.\r | |
167 | @param[out] DataOutSize Size of the output data buffer in bytes.\r | |
168 | \r | |
169 | @retval TRUE AEAD AES-GCM authenticated decryption succeeded.\r | |
170 | @retval FALSE AEAD AES-GCM authenticated decryption failed.\r | |
171 | \r | |
172 | **/\r | |
173 | BOOLEAN\r | |
174 | EFIAPI\r | |
175 | AeadAesGcmDecrypt (\r | |
176 | IN CONST UINT8 *Key,\r | |
177 | IN UINTN KeySize,\r | |
178 | IN CONST UINT8 *Iv,\r | |
179 | IN UINTN IvSize,\r | |
180 | IN CONST UINT8 *AData,\r | |
181 | IN UINTN ADataSize,\r | |
182 | IN CONST UINT8 *DataIn,\r | |
183 | IN UINTN DataInSize,\r | |
184 | IN CONST UINT8 *Tag,\r | |
185 | IN UINTN TagSize,\r | |
186 | OUT UINT8 *DataOut,\r | |
187 | OUT UINTN *DataOutSize\r | |
188 | )\r | |
189 | {\r | |
190 | EVP_CIPHER_CTX *Ctx;\r | |
191 | CONST EVP_CIPHER *Cipher;\r | |
192 | UINTN TempOutSize;\r | |
193 | BOOLEAN RetValue;\r | |
194 | \r | |
195 | if (DataInSize > INT_MAX) {\r | |
196 | return FALSE;\r | |
197 | }\r | |
198 | \r | |
199 | if (ADataSize > INT_MAX) {\r | |
200 | return FALSE;\r | |
201 | }\r | |
202 | \r | |
203 | if (IvSize != 12) {\r | |
204 | return FALSE;\r | |
205 | }\r | |
206 | \r | |
207 | switch (KeySize) {\r | |
208 | case 16:\r | |
209 | Cipher = EVP_aes_128_gcm ();\r | |
210 | break;\r | |
211 | case 24:\r | |
212 | Cipher = EVP_aes_192_gcm ();\r | |
213 | break;\r | |
214 | case 32:\r | |
215 | Cipher = EVP_aes_256_gcm ();\r | |
216 | break;\r | |
217 | default:\r | |
218 | return FALSE;\r | |
219 | }\r | |
220 | \r | |
221 | if ((TagSize != 12) && (TagSize != 13) && (TagSize != 14) && (TagSize != 15) && (TagSize != 16)) {\r | |
222 | return FALSE;\r | |
223 | }\r | |
224 | \r | |
225 | if (DataOutSize != NULL) {\r | |
226 | if ((*DataOutSize > INT_MAX) || (*DataOutSize < DataInSize)) {\r | |
227 | return FALSE;\r | |
228 | }\r | |
229 | }\r | |
230 | \r | |
231 | Ctx = EVP_CIPHER_CTX_new ();\r | |
232 | if (Ctx == NULL) {\r | |
233 | return FALSE;\r | |
234 | }\r | |
235 | \r | |
236 | RetValue = (BOOLEAN)EVP_DecryptInit_ex (Ctx, Cipher, NULL, NULL, NULL);\r | |
237 | if (!RetValue) {\r | |
238 | goto Done;\r | |
239 | }\r | |
240 | \r | |
241 | RetValue = (BOOLEAN)EVP_CIPHER_CTX_ctrl (Ctx, EVP_CTRL_GCM_SET_IVLEN, (INT32)IvSize, NULL);\r | |
242 | if (!RetValue) {\r | |
243 | goto Done;\r | |
244 | }\r | |
245 | \r | |
246 | RetValue = (BOOLEAN)EVP_DecryptInit_ex (Ctx, NULL, NULL, Key, Iv);\r | |
247 | if (!RetValue) {\r | |
248 | goto Done;\r | |
249 | }\r | |
250 | \r | |
251 | RetValue = (BOOLEAN)EVP_DecryptUpdate (Ctx, NULL, (INT32 *)&TempOutSize, AData, (INT32)ADataSize);\r | |
252 | if (!RetValue) {\r | |
253 | goto Done;\r | |
254 | }\r | |
255 | \r | |
256 | RetValue = (BOOLEAN)EVP_DecryptUpdate (Ctx, DataOut, (INT32 *)&TempOutSize, DataIn, (INT32)DataInSize);\r | |
257 | if (!RetValue) {\r | |
258 | goto Done;\r | |
259 | }\r | |
260 | \r | |
261 | RetValue = (BOOLEAN)EVP_CIPHER_CTX_ctrl (Ctx, EVP_CTRL_GCM_SET_TAG, (INT32)TagSize, (VOID *)Tag);\r | |
262 | if (!RetValue) {\r | |
263 | goto Done;\r | |
264 | }\r | |
265 | \r | |
266 | RetValue = (BOOLEAN)EVP_DecryptFinal_ex (Ctx, DataOut, (INT32 *)&TempOutSize);\r | |
267 | \r | |
268 | Done:\r | |
269 | EVP_CIPHER_CTX_free (Ctx);\r | |
270 | if (!RetValue) {\r | |
271 | return RetValue;\r | |
272 | }\r | |
273 | \r | |
274 | if (DataOutSize != NULL) {\r | |
275 | *DataOutSize = DataInSize;\r | |
276 | }\r | |
277 | \r | |
278 | return RetValue;\r | |
279 | }\r |