1 /* 2 * @file hi_cipher.h 3 * 4 * Copyright (c) 2020 HiSilicon (Shanghai) Technologies CO., LIMITED. 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 /** @defgroup iot_cipher Cipher APIs 19 * @ingroup iot_romboot 20 */ 21 #ifndef __HI_CIPHER_H__ 22 #define __HI_CIPHER_H__ 23 24 #include <hi_types.h> 25 #include <hi_boot_err.h> 26 27 #ifdef __cplusplus 28 #if __cplusplus 29 extern "C" { 30 #endif 31 #endif /* __cplusplus */ 32 33 #define PKE_LEN_32_BYTES 32 34 #define PKE_LEN_256_BYTES 256 35 #define PKE_LEN_384_BYTES 384 36 #define PKE_LEN_512_BYTES 512 37 #define RSA_KEY_LEN_2048 256 38 #define AES_MAX_KEY_IN_WORD 16 39 #define AES_IV_LEN_IN_WORD 4 40 #define KDF_KEY_LEN_IN_BYTES 32 41 42 /** 43 * @ingroup iot_cipher 44 * Rsa sign and veriry scheme 45 */ 46 typedef enum { 47 HI_CIPHER_RSA_SIGN_SCHEME_RSASSA_PKCS1_V15_SHA256 = 0x00, /* PKCS#1 RSASSA_PKCS1_V15_SHA256 signature */ 48 HI_CIPHER_RSA_SIGN_SCHEME_RSASSA_PKCS1_PSS_SHA256, /* PKCS#1 RSASSA_PKCS1_PSS_SHA256 signature */ 49 HI_CIPHER_RSA_SIGN_SCHEME_MAX, 50 HI_CIPHER_RSA_SIGN_SCHEME_INVALID = 0xffffffff, 51 }hi_cipher_rsa_sign_scheme; 52 53 /** 54 * @ingroup iot_cipher 55 * Aes key from 56 */ 57 typedef enum { 58 HI_CIPHER_AES_KEY_FROM_CPU = 0x00, 59 HI_CIPHER_AES_KEY_FROM_KDF, 60 HI_CIPHER_AES_KEY_FROM_MAX, 61 HI_CIPHER_AES_KEY_FROM_INVALID = 0xffffffff, 62 }hi_cipher_aes_key_from; 63 64 /** 65 * @ingroup iot_cipher 66 * Aes work mode 67 */ 68 typedef enum { 69 HI_CIPHER_AES_WORK_MODE_ECB = 0x00, /* Electronic codebook (ECB) mode, ECB has been considered insecure and 70 it is recommended not to use it. */ 71 HI_CIPHER_AES_WORK_MODE_CBC, /* Cipher block chaining (CBC) mode. */ 72 HI_CIPHER_AES_WORK_MODE_CTR, /* Counter (CTR) mode. */ 73 HI_CIPHER_AES_WORK_MODE_XTS, /* XTS-AES (XTS) mode. */ 74 HI_CIPHER_AES_WORK_MODE_MAX, 75 HI_CIPHER_AES_WORK_MODE_INVALID = 0xffffffff, 76 }hi_cipher_aes_work_mode; 77 78 /** 79 * @ingroup iot_cipher 80 * Aes key length 81 */ 82 typedef enum { 83 HI_CIPHER_AES_KEY_LENGTH_128BIT = 0x00, 84 HI_CIPHER_AES_KEY_LENGTH_192BIT, 85 HI_CIPHER_AES_KEY_LENGTH_256BIT, 86 HI_CIPHER_AES_KEY_LENGTH_512BIT, /* 512bit, just used for xts. */ 87 HI_CIPHER_AES_KEY_LENGTH_MAX, 88 HI_CIPHER_AES_KEY_LENGTH_INVALID = 0xffffffff, 89 }hi_cipher_aes_key_length; 90 91 /** 92 * @ingroup iot_cipher 93 * Rsa public key verify 94 */ 95 typedef struct { 96 hi_cipher_rsa_sign_scheme scheme; /* The rsa sign type */ 97 hi_u8 *e; /* The public exponent */ 98 hi_u8 *n; /* The modulus */ 99 hi_u32 klen; /* The key length */ 100 } hi_cipher_rsa_verify; 101 102 /** 103 * @ingroup iot_cipher 104 * Struct of ecc curves parameters 105 */ 106 typedef struct { 107 const hi_u8 *p; /* Finite field: equal to p in case of prime field curves or equal to 2^n in case of binary 108 field curves. */ 109 const hi_u8 *a; /* Curve parameter a (q-3 in Suite B). */ 110 const hi_u8 *b; /* Curve parameter b. */ 111 const hi_u8 *gx; /* X coordinates of G which is a base point on the curve. */ 112 const hi_u8 *gy; /* Y coordinates of G which is a base point on the curve. */ 113 const hi_u8 *n; /* Prime which is the order of G point. */ 114 hi_u32 h; /* Cofactor, which is the order of the elliptic curve divided by the order of the point G. For 115 the Suite B curves, h = 1. */ 116 hi_u32 ksize; /* Ecc key size in bytes. It corresponds to the size in bytes of the prime, should be 32bytes. */ 117 }hi_cipher_ecc_param; 118 119 /** 120 * @ingroup iot_cipher 121 * Struct of ecc verify 122 */ 123 typedef struct { 124 const hi_u8 *px; /* Ecdh X coordinates of the generated public key, the caller ensures it is padded with leading 125 zeros if the effective size of this key is smaller than ecc key size. */ 126 const hi_u8 *py; /* Ecdh Y coordinates of the generated public key, the caller ensures it is padded with leading 127 zeros if the effective size of this key is smaller than ecc key size. */ 128 const hi_u8 *hash; /* Input hash data for ecc verify. */ 129 hi_u32 hash_len; /* The length of hash data, just 32 bytes is valid data. */ 130 const hi_u8 *r; /* Output ecc sign result R, its length is ecc key size. */ 131 const hi_u8 *s; /* Output ecc sign result S, its length is ecc key size. */ 132 hi_u8 *out_r; /* Output verify r data for security. */ 133 }hi_cipher_ecc_verify; 134 135 /** 136 * @ingroup iot_cipher 137 * Struct of rsa verify 138 */ 139 typedef struct { 140 hi_u8 *hash; /* The input hash value will be changed after hi_cipher_rsa_verify_hash execution, 141 the correct value should be input before each verification */ 142 hi_u8 *out_hash; 143 hi_u32 hash_len; 144 const hi_u8 *sign; 145 hi_u32 sign_len; 146 } hi_cipher_rsa_data; 147 148 /** 149 * @ingroup iot_cipher 150 * Aes ctrl struct 151 */ 152 typedef struct { 153 hi_u32 key[AES_MAX_KEY_IN_WORD]; /* Key input. */ 154 hi_u32 iv[AES_IV_LEN_IN_WORD]; /* Initialization vector (IV). */ 155 hi_bool random_en; /* Enable random delay or not. */ 156 hi_cipher_aes_key_from key_from; /* Key from, When using kdf key, no nead to configure the input key. */ 157 hi_cipher_aes_work_mode work_mode; /* Work mode. */ 158 hi_cipher_aes_key_length key_len; /* Key length. aes-ecb/cbc/ctr support 128/192/256 bits key, ccm just support 159 128 bits key, xts just support 256/512 bits key. */ 160 }hi_cipher_aes_ctrl; 161 162 /** 163 * @ingroup iot_cipher 164 * Kdf key type 165 */ 166 typedef enum { 167 HI_CIPHER_SSS_KDF_KEY_DEVICE = 0x0, /* kdf device key derivation. */ 168 HI_CIPHER_SSS_KDF_KEY_STORAGE, /* kdf storage key derivation. */ 169 HI_CIPHER_SSS_KDF_KEY_MAX, 170 HI_CIPHER_SSS_KDF_KEY_INVALID = 0xFFFFFFFF, 171 }hi_cipher_kdf_mode; 172 173 /** 174 * @ingroup iot_cipher 175 * Kdf ctrl struct 176 */ 177 typedef struct { 178 const hi_u8 *salt; /* salt for kdf key derivation. */ 179 hi_u32 salt_len; /* salt_len should be 16 bytes for kdf device key derivation, 180 32 bytes for kdf storage key derivation. */ 181 hi_u8 key[KDF_KEY_LEN_IN_BYTES]; /* just used for kdf device key. */ 182 hi_cipher_kdf_mode kdf_mode; /* kdf mode for key derivation. */ 183 hi_u32 kdf_cnt; /**< kdf cnt for iteration.It is recommended that the number of iterations be 184 not less than 10000 times, if performance requirement, no less than 1000 185 times, and not more than 0xffff times. */ 186 hi_u8 result[KDF_KEY_LEN_IN_BYTES]; /* output for kdf device key derivation. */ 187 }hi_cipher_kdf_ctrl; 188 189 /** 190 * @ingroup iot_cipher 191 * @brief Initializes the Cipher module. CNcomment:Cipher 模块初始化。CNend 192 * 193 * @par 描述: 194 * Initializes the Cipher module. 195 CNcomment:Cipher模块初始化。CNend 196 * 197 * @attention This function must be called before using cipher module. 198 CNcomment:使用Cipher模块算法前调用本接口初始化。CNend 199 * @param None 200 * 201 * @retval #HI_ERR_SUCCESS Success 202 * @retval #Other Failure. For details, see hi_boot_err.h. 203 * @par 依赖: 204 * @li hi_cipher.h：Describes Cipher module APIs. 205 CNcomment:文件用于描述Cipher模块相关接口。CNend 206 * @see hi_cipher_init。 207 */ 208 hi_u32 hi_cipher_init(hi_void); 209 210 /** 211 * @ingroup iot_cipher 212 * @brief Deinitializes the Cipher module. CNcomment:Cipher 模块去初始化。CNend 213 * 214 * @par 描述: 215 * Deinitializes the Cipher module, does NOT support multi-tasks. 216 CNcomment:Cipher模块去初始化,不支持多任务。CNend 217 * 218 * @attention This function could be called after using Cipher module finished. 219 CNcomment:结束使用Cipher模块算法后调用本接口去初始化。CNend 220 * @param None 221 * 222 * @retval #HI_ERR_SUCCESS Success 223 * @retval #Other Failure. For details, see hi_boot_err.h. 224 * @par 依赖: 225 * @li hi_cipher.h：Describes Cipher module APIs. 226 CNcomment:文件用于描述Cipher模块相关接口。CNend 227 * @see hi_cipher_deinit。 228 */ 229 hi_u32 hi_cipher_deinit(hi_void); 230 231 /** 232 * @ingroup iot_cipher 233 * @brief Settings of AES. CNcomment:AES算法参数配置。CNend 234 * 235 * @par 描述: 236 * Configure of AES. CNcomment:AES算法参数配置。CNend 237 * 238 * @attention None 239 * @param ctrl [IN] type #hi_cipher_aes_ctrl *，AES parameters. CNcomment:AES算法参数配置。CNend 240 * 241 * @retval #HI_ERR_SUCCESS Success 242 * @retval #Other Failure. For details, see hi_boot_err.h. 243 * @par 依赖: 244 * @li hi_cipher.h：Describes Cipher module APIs. 245 CNcomment:文件用于描述Cipher模块相关接口。CNend 246 * @see hi_cipher_aes_config。 247 */ 248 hi_u32 hi_cipher_aes_config(hi_cipher_aes_ctrl *ctrl); 249 250 /** 251 * @ingroup iot_cipher 252 * @brief Encryption/Decryption of AES, if execution fails, hi_cipher_aes_destroy_config must be called to 253 release resources. 254 CNcomment:AES算法加解密，如果执行失败，必须调用hi_cipher_aes_destroy_config接口释放资源。CNend 255 * 256 * @par 描述: 257 * Encryption/Decryption of AES. CNcomment:AES算法加解密。CNend 258 * 259 * @attention 无。 260 * @param src_addr [IN] type #uintptr_t，Input data source address. 261 CNcomment:待加密或解密的源数据物理地址，地址要求4对齐。CNend 262 * @param dest_addr [OUT] type #uintptr_t，output data physical address, the address must be 263 aligned in 4 bytes. 264 CNcomment:加密或解密结果数据物理地址，地址要求4对齐。CNend 265 * @param length [IN] type #hi_u32，data length, ECB/CBC/CTR/XTS must be aligned in 16 bytes. 266 CNcomment:数据长度， ECB/CBC/CTR/XTS要求16bytes对齐。CNend 267 * @param encrypt [IN] type #hi_bool，options of encryption/decryption, HI_TRUE is for encryption, 268 HI_FALSE is for decryption.CNcomment:加解密配置选项，配置HI_TRUE为加密，配置HI_FALSE为解密。CNend 269 * 270 * @retval #HI_ERR_SUCCESS Success 271 * @retval #Other Failure. For details, see hi_boot_err.h. 272 * @par 依赖: 273 * @li hi_cipher.h：Describes Cipher module APIs. 274 CNcomment:文件用于描述Cipher模块相关接口。CNend 275 * @see hi_cipher_aes_crypto。 276 */ 277 hi_u32 hi_cipher_aes_crypto(uintptr_t src_addr, uintptr_t dest_addr, hi_u32 length, hi_bool encrypt); 278 279 /** 280 * @ingroup iot_cipher 281 * @brief Destory AES configures. CNcomment:AES算法销毁配置的参数CNend 282 * 283 * @par 描述: 284 * Destory AES configures. CNcomment:AES算法销毁配置的参数CNend 285 * 286 * @attention In pair with hi_cipher_aes_config.CNcomment:与参数配置成对使用CNend 287 * @param None 288 289 * @retval #HI_ERR_SUCCESS Success 290 * @retval #Other Failure. For details, see hi_boot_err.h. 291 * @par 依赖: 292 * @li hi_cipher.h：Describes Cipher module APIs. 293 CNcomment:文件用于描述Cipher模块相关接口。CNend 294 * @see hi_cipher_aes_destroy_config。 295 */ 296 hi_u32 hi_cipher_aes_destroy_config(hi_void); 297 298 /** 299 * @ingroup iot_cipher 300 * @brief Settings of HASH.CNcomment:HASH算法参数配置CNend 301 * 302 * @par 描述: 303 * Settings of HASH, this function should be called before calculating. 304 CNcomment:HASH算法参数配置，HASH计算前调用 305 * 306 * @attention None 307 * @param atts [IN] type #const hi_cipher_hash_atts *，HASH attribute.CNcomment:HASH算法类型配置。CNend 308 309 * @retval #HI_ERR_SUCCESS Success 310 * @retval #Other Failure. For details, see hi_boot_err.h. 311 * @par 依赖: 312 * @li hi_cipher.h：Describes Cipher module APIs. 313 CNcomment:文件用于描述Cipher模块相关接口。CNend 314 * @see hi_cipher_hash_start。 315 */ 316 hi_u32 hi_cipher_hash_start(hi_void); 317 318 /** 319 * @ingroup iot_cipher 320 * @brief Calculating by HASH.CNcomment:HASH计算CNend 321 * 322 * @par 描述: 323 * Hash calculation. Multiple segments can be calculated，Maximum 10KB per segment. 324 CNcomment:HASH计算，支持多段计算，每段最长10KB。CNend 325 * 326 * @attention None 327 * @param src_addr [IN] type #uintptr_t，Data address to be calculated by HASH. 328 CNcomment:待HASH计算的数据地址。CNend 329 * @param length [IN] type #hi_u32，Data length to be calculated by HASH，maximum is 10KB. 330 CNcomment:待HASH计算的数据长度,最长10KB。CNend 331 * 332 * @retval #HI_ERR_SUCCESS Success 333 * @retval #Other Failure. For details, see hi_boot_err.h. 334 * @par 依赖: 335 * @li hi_cipher.h：Describes Cipher module APIs. 336 CNcomment:文件用于描述Cipher模块相关接口。CNend 337 * @see hi_cipher_hash_update。 338 */ 339 hi_u32 hi_cipher_hash_update(uintptr_t src_addr, hi_u32 length); 340 341 /** 342 * @ingroup iot_cipher 343 * @brief HASH calculation finished.CNcomment:HASH计算结束CNend 344 * 345 * @par 描述: 346 * Ouput results after HASH finished calculating.CNcomment:HASH计算结束， 347 输出计算结果。CNend 348 * 349 * @attention None 350 * 351 * @param out [OUT] type #hi_u8 *，Pointer to the output of the HASH calculation result. 352 CNcomment:HASH计算结果输出指针。CNend 353 * @param out_len [IN] type #hi_u32，HASH The output pointer of the calculation result points to 354 * the space length. The output length must be greater than or equal to 32 bytes. 355 CNcomment:HASH计算结果输出指针指向空间长度,要求输出长度满足不小于32bytes。CNend 356 * 357 * @retval #HI_ERR_SUCCESS Success 358 * @retval #Other Failure. For details, see hi_boot_err.h. 359 * @par 依赖: 360 * @li hi_cipher.h：Describes Cipher module APIs. 361 CNcomment:文件用于描述Cipher模块相关接口。CNend 362 * @see hi_cipher_hash_final。 363 */ 364 hi_u32 hi_cipher_hash_final(hi_u8 *out, hi_u32 out_len); 365 366 /** 367 * @ingroup iot_cipher 368 * @brief HASH calculation.CNcomment:HASH计算CNend 369 * 370 * @par 描述: 371 * Performs hash calculation on a segment of data and outputs the hash result. 372 CNcomment:对一段数据做HASH计算，并输出HASH结果。CNend 373 * 374 * @attention None 375 * 376 * @param input [IN] type #uintptr_t，Enter the data address. The address must be 4-bytes-aligned. 377 CNcomment:输入数据地址，地址要求4对齐。CNend 378 * @param input_len [IN] type #hi_u32， Input data length.CNcomment:输入数据长度。CNend 379 * @param hash [OUT] type #hi_u8 *，Output the hash result. The length is 32 bytes. 380 CNcomment:输出HASH结果， 长度为 32 bytes。CNend 381 * @param hash_len [IN] type #hi_u32， BUF length of the hash result. The value must be greater than or 382 * equal to 32 bytes.CNcomment:输出HASH结果的BUF长度，需要满足不小于32bytes。CNend 383 * 384 * @retval #HI_ERR_SUCCESS Success 385 * @retval #Other Failure. For details, see hi_boot_err.h. 386 * @par 依赖: 387 * @li hi_cipher.h：Describes Cipher module APIs. 388 CNcomment:文件用于描述Cipher模块相关接口。CNend 389 * @see hi_cipher_hash_sha256。 390 */ 391 hi_u32 hi_cipher_hash_sha256(uintptr_t input, hi_u32 input_len, hi_u8 *hash, hi_u32 hash_len); 392 393 /** 394 * @ingroup iot_cipher 395 * @brief KDF calculation.CNcomment:KDF算法计算。CNend 396 * 397 * @par 描述: 398 * KDF calculation.CNcomment:KDF算法计算。CNend 399 * 400 * @attention None 401 * @param ctrl [IN] type #hi_cipher_kdf_ctrl*，Poninter to KDF algorithm parameter configuration 402 control structure.CNcomment:KDF算法参数配置控制结构体。CNend 403 * 404 * @retval #HI_ERR_SUCCESS Success 405 * @retval #Other Failure. For details, see hi_boot_err.h. 406 * @par 依赖: 407 * @li hi_cipher.h：Describes Cipher module APIs. 408 CNcomment:文件用于描述Cipher模块相关接口。CNend 409 * @see hi_cipher_kdf_key_derive。 410 */ 411 hi_u32 hi_cipher_kdf_key_derive(hi_cipher_kdf_ctrl *ctrl); 412 413 /** 414 * @ingroup iot_cipher 415 * @brief Rsa Signature Verification.CNcomment:Rsa 签名结果校验CNend 416 * 417 * @par 描述: 418 * Rsa Signature Verification.CNcomment:Rsa 签名结果校验。CNend 419 * 420 * @attention None 421 * @param rsa_verify [IN] type #hi_cipher_rsa_verify *，Structure of the Rsa signature result 422 * verification algorithm.CNcomment:Rsa签名结果校验算法结构体。CNend 423 * @param hash [IN] type #const hi_u8 *，Hash data to be checked. 424 CNcomment:待校验的HASH数据。CNend 425 * @param hash_len [IN] type #hi_u32， Indicates the length of the hash data to be verified. 426 * The value is 32 bytes valid data. 427 CNcomment:待校验的HASH数据的长度，为32bytes有效数据。CNend 428 * @param sign [IN] type #const hi_u8 *，Signature input pointer.CNcomment:签名输入指针。CNend 429 * @param sign_len [IN] type #hi_u32，Length of the signature result. The length is the same as the 430 * length of the key.CNcomment:签名结果长度, 长度与key的长度相同。CNend 431 * 432 * @retval #HI_ERR_SUCCESS Success 433 * @retval #Other Failure. For details, see hi_boot_err.h. 434 * @par 依赖: 435 * @li hi_cipher.h：Describes Cipher module APIs. 436 CNcomment:文件用于描述Cipher模块相关接口。CNend 437 * @see hi_cipher_rsa_verify_hash。 438 */ 439 hi_u32 hi_cipher_rsa_verify_hash(const hi_cipher_rsa_verify *rsa_verify, hi_cipher_rsa_data *pack); 440 441 /** 442 * @ingroup iot_cipher 443 * @brief Ecdsa Signature Verification.CNcomment:Ecdsa 签名结果校验CNend 444 * 445 * @par 描述: 446 * Ecdsa Signature Verification.CNcomment:Ecdsa 签名结果校验。CNend 447 * 448 * @attention None 449 * @param ecc [IN] type #const hi_cipher_ecc_param *，ECC elliptic curve parameter. If the length 450 * is less than the size of the key, add 0 before the key. 451 CNcomment:ECC椭圆曲线参数，长度不足Key的大小，前面补0。CNend 452 * @param verify [IN] type #const hi_cipher_ecc_verify *，Pointer to structure of the ECC public key 453 * verification parameter.CNcomment:ECC公钥验证参数结构体。CNend 454 * 455 * @retval #HI_ERR_SUCCESS Success 456 * @retval #Other Failure. For details, see hi_boot_err.h. 457 * @par 依赖: 458 * @li hi_cipher.h：Describes Cipher module APIs. 459 CNcomment:文件用于描述Cipher模块相关接口。CNend 460 * @see hi_cipher_ecc_sign_hash。 461 */ 462 hi_u32 hi_cipher_ecc_verify_hash(hi_cipher_ecc_param *ecc, hi_cipher_ecc_verify *verify); 463 464 /** 465 * @ingroup iot_cipher 466 * @brief TRNG Obtain a random number.CNcomment:TRNG获取随机数CNend 467 * 468 * @par 描述: 469 * TRNG Obtain a random number. Only one word size can be obtained at a time. 470 CNcomment:TRNG获取随机数，每次只能获取一个WORD大小的随机数。CNend 471 * 472 * @attention None 473 * @param randnum [OUT] type #hi_u32 *，Random number output pointer. 474 CNcomment:随机数输出指针。CNend 475 * 476 * @retval #HI_ERR_SUCCESS Success 477 * @retval #Other Failure. For details, see hi_boot_err.h. 478 * @par 依赖: 479 * @li hi_cipher.h：Describes Cipher module APIs. 480 CNcomment:文件用于描述Cipher模块相关接口。CNend 481 * @see hi_cipher_trng_get_random。 482 */ 483 hi_u32 hi_cipher_trng_get_random(hi_u32 *randnum); 484 485 /** 486 * @ingroup iot_cipher 487 * @brief TRNG Obtain a random number.CNcomment:TRNG获取随机数CNend 488 * 489 * @par 描述: 490 * The TRNG obtains the random number and obtains the random number of multiple bytes at a time. 491 CNcomment:TRNG获取随机数，每次获取多个byte的随机数。CNend 492 * 493 * @attention None 494 * @param randbyte [OUT] type #hi_u8 *，Random number output pointer. 495 CNcomment:随机数输出指针。CNend 496 * @param size [IN] type #hi_u32，Length of the obtained random number. 497 CNcomment:获取的随机数长度。CNend 498 * 499 * @retval #HI_ERR_SUCCESS Success 500 * @retval #Other Failure. For details, see hi_boot_err.h. 501 * @par 依赖: 502 * @li hi_cipher.h：Describes Cipher module APIs. 503 CNcomment:文件用于描述Cipher模块相关接口。CNend 504 * @see hi_cipher_trng_get_random。 505 */ 506 hi_u32 hi_cipher_trng_get_random_bytes(hi_u8 *randbyte, hi_u32 size); 507 508 #ifdef __cplusplus 509 #if __cplusplus 510 } 511 #endif 512 #endif /* __cplusplus */ 513 514 #endif /* __HI_CIPHER_H__ */ 515