2017-08-01 14:29:16 +00:00
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// Hardware crypto support Copyright 2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef __ESP_WIFI_CRYPTO_TYPES_H__
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#define __ESP_WIFI_CRYPTO_TYPES_H__
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2017-09-27 01:17:32 +00:00
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/* This is an internal API header for configuring the implementation used for WiFi cryptographic
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operations.
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During normal operation, you don't need to use any of these types or functions in this header.
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See esp_wifi.h & esp_wifi_types.h instead.
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*/
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2017-08-01 14:29:16 +00:00
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#ifdef __cplusplus
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extern "C" {
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#endif
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2018-05-29 12:25:20 +00:00
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#define ESP_WIFI_CRYPTO_VERSION 0x00000001
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2017-08-01 14:29:16 +00:00
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/*
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2017-09-27 01:17:32 +00:00
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* Enumeration for hash operations.
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* When WPA2 is connecting, this enum is used to
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* request a hash algorithm via crypto_hash_xxx functions.
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2017-08-01 14:29:16 +00:00
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*/
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typedef enum {
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ESP_CRYPTO_HASH_ALG_MD5, ESP_CRYPTO_HASH_ALG_SHA1,
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ESP_CRYPTO_HASH_ALG_HMAC_MD5, ESP_CRYPTO_HASH_ALG_HMAC_SHA1,
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ESP_CRYPTO_HASH_ALG_SHA256, ESP_CRYPTO_HASH_ALG_HMAC_SHA256
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}esp_crypto_hash_alg_t;
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/*
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2017-09-27 01:17:32 +00:00
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* Enumeration for block cipher operations.
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* When WPA2 is connecting, this enum is used to request a block
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* cipher algorithm via crypto_cipher_xxx functions.
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2017-08-01 14:29:16 +00:00
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*/
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typedef enum {
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ESP_CRYPTO_CIPHER_NULL, ESP_CRYPTO_CIPHER_ALG_AES, ESP_CRYPTO_CIPHER_ALG_3DES,
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ESP_CRYPTO_CIPHER_ALG_DES, ESP_CRYPTO_CIPHER_ALG_RC2, ESP_CRYPTO_CIPHER_ALG_RC4
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} esp_crypto_cipher_alg_t;
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/*
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* This structure is about the algorithm when do crypto_hash operation, for detail,
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* please reference to the structure crypto_hash.
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*/
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typedef struct crypto_hash esp_crypto_hash_t;
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/*
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* This structure is about the algorithm when do crypto_cipher operation, for detail,
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* please reference to the structure crypto_cipher.
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*/
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typedef struct crypto_cipher esp_crypto_cipher_t;
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/**
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* @brief The AES callback function when do WPS connect.
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*
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* @param key Encryption key.
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* @param iv Encryption IV for CBC mode (16 bytes).
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* @param data Data to encrypt in-place.
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* @param data_len Length of data in bytes (must be divisible by 16)
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*/
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2017-10-19 09:42:55 +00:00
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typedef int (*esp_aes_128_encrypt_t)(const unsigned char *key, const unsigned char *iv, unsigned char *data, int data_len);
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2017-08-01 14:29:16 +00:00
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/**
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* @brief The AES callback function when do WPS connect.
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*
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* @param key Decryption key.
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* @param iv Decryption IV for CBC mode (16 bytes).
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* @param data Data to decrypt in-place.
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* @param data_len Length of data in bytes (must be divisible by 16)
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*
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*/
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2017-10-19 09:42:55 +00:00
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typedef int (*esp_aes_128_decrypt_t)(const unsigned char *key, const unsigned char *iv, unsigned char *data, int data_len);
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2017-08-01 14:29:16 +00:00
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/**
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* @brief The AES callback function when do STA connect.
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*
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* @param kek 16-octet Key encryption key (KEK).
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* @param n Length of the plaintext key in 64-bit units;
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* @param plain Plaintext key to be wrapped, n * 64 bits
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* @param cipher Wrapped key, (n + 1) * 64 bits
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*
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*/
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2017-10-19 09:42:55 +00:00
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typedef int (*esp_aes_wrap_t)(const unsigned char *kek, int n, const unsigned char *plain, unsigned char *cipher);
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2017-08-01 14:29:16 +00:00
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/**
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* @brief The AES callback function when do STA connect.
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*
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* @param kek 16-octet Key decryption key (KEK).
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* @param n Length of the plaintext key in 64-bit units;
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* @param cipher Wrapped key to be unwrapped, (n + 1) * 64 bits
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* @param plain Plaintext key, n * 64 bits
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*
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*/
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2017-10-19 09:42:55 +00:00
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typedef int (*esp_aes_unwrap_t)(const unsigned char *kek, int n, const unsigned char *cipher, unsigned char *plain);
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2017-08-01 14:29:16 +00:00
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/**
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* @brief The SHA256 callback function when do WPS connect.
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*
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* @param key Key for HMAC operations.
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* @param key_len Length of the key in bytes.
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* @param num_elem Number of elements in the data vector.
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* @param addr Pointers to the data areas.
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* @param len Lengths of the data blocks.
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* @param mac Buffer for the hash (32 bytes).
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*
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*/
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2017-10-19 09:42:55 +00:00
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typedef void (*esp_hmac_sha256_vector_t)(const unsigned char *key, int key_len, int num_elem,
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2017-08-01 14:29:16 +00:00
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const unsigned char *addr[], const int *len, unsigned char *mac);
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/**
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* @brief The AES callback function when do STA connect.
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*
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* @param key Key for PRF.
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* @param key_len Length of the key in bytes.
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* @param label A unique label for each purpose of the PRF.
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* @param data Extra data to bind into the key.
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* @param data_len Length of the data.
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* @param buf Buffer for the generated pseudo-random key.
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* @param buf_len Number of bytes of key to generate.
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*
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*/
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2017-10-19 09:42:55 +00:00
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typedef void (*esp_sha256_prf_t)(const unsigned char *key, int key_len, const char *label,
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const unsigned char *data, int data_len, unsigned char *buf, int buf_len);
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2017-10-19 09:42:55 +00:00
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/**
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* @brief HMAC-MD5 over data buffer (RFC 2104)'
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*
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* @key: Key for HMAC operations
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* @key_len: Length of the key in bytes
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* @data: Pointers to the data area
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* @data_len: Length of the data area
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* @mac: Buffer for the hash (16 bytes)
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* Returns: 0 on success, -1 on failure
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*/
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typedef int (*esp_hmac_md5_t)(const unsigned char *key, unsigned int key_len, const unsigned char *data,
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unsigned int data_len, unsigned char *mac);
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/**
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* @brief HMAC-MD5 over data vector (RFC 2104)
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*
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* @key: Key for HMAC operations
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* @key_len: Length of the key in bytes
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* @num_elem: Number of elements in the data vector
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* @addr: Pointers to the data areas
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* @len: Lengths of the data blocks
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* @mac: Buffer for the hash (16 bytes)
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* Returns: 0 on success, -1 on failure
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*/
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typedef int (*esp_hmac_md5_vector_t)(const unsigned char *key, unsigned int key_len, unsigned int num_elem,
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const unsigned char *addr[], const unsigned int *len, unsigned char *mac);
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/**
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* @brief HMAC-SHA1 over data buffer (RFC 2104)
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*
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* @key: Key for HMAC operations
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* @key_len: Length of the key in bytes
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* @data: Pointers to the data area
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* @data_len: Length of the data area
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* @mac: Buffer for the hash (20 bytes)
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* Returns: 0 on success, -1 of failure
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*/
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typedef int (*esp_hmac_sha1_t)(const unsigned char *key, unsigned int key_len, const unsigned char *data,
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unsigned int data_len, unsigned char *mac);
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/**
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* @brief HMAC-SHA1 over data vector (RFC 2104)
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*
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* @key: Key for HMAC operations
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* @key_len: Length of the key in bytes
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* @num_elem: Number of elements in the data vector
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* @addr: Pointers to the data areas
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* @len: Lengths of the data blocks
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* @mac: Buffer for the hash (20 bytes)
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* Returns: 0 on success, -1 on failure
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*/
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typedef int (*esp_hmac_sha1_vector_t)(const unsigned char *key, unsigned int key_len, unsigned int num_elem,
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const unsigned char *addr[], const unsigned int *len, unsigned char *mac);
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/**
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* @brief SHA1-based Pseudo-Random Function (PRF) (IEEE 802.11i, 8.5.1.1)
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*
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* @key: Key for PRF
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* @key_len: Length of the key in bytes
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* @label: A unique label for each purpose of the PRF
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* @data: Extra data to bind into the key
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* @data_len: Length of the data
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* @buf: Buffer for the generated pseudo-random key
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* @buf_len: Number of bytes of key to generate
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* Returns: 0 on success, -1 of failure
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*
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* This function is used to derive new, cryptographically separate keys from a
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* given key (e.g., PMK in IEEE 802.11i).
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*/
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typedef int (*esp_sha1_prf_t)(const unsigned char *key, unsigned int key_len, const char *label,
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const unsigned char *data, unsigned int data_len, unsigned char *buf, unsigned int buf_len);
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/**
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* @brief SHA-1 hash for data vector
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*
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* @num_elem: Number of elements in the data vector
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* @addr: Pointers to the data areas
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* @len: Lengths of the data blocks
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* @mac: Buffer for the hash
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* Returns: 0 on success, -1 on failure
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*/
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typedef int (*esp_sha1_vector_t)(unsigned int num_elem, const unsigned char *addr[], const unsigned int *len,
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unsigned char *mac);
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/**
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* @brief SHA1-based key derivation function (PBKDF2) for IEEE 802.11i
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*
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* @passphrase: ASCII passphrase
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* @ssid: SSID
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* @ssid_len: SSID length in bytes
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* @iterations: Number of iterations to run
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* @buf: Buffer for the generated key
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* @buflen: Length of the buffer in bytes
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* Returns: 0 on success, -1 of failure
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*
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* This function is used to derive PSK for WPA-PSK. For this protocol,
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* iterations is set to 4096 and buflen to 32. This function is described in
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* IEEE Std 802.11-2004, Clause H.4. The main construction is from PKCS#5 v2.0.
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*/
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typedef int (*esp_pbkdf2_sha1_t)(const char *passphrase, const char *ssid, unsigned int ssid_len,
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int iterations, unsigned char *buf, unsigned int buflen);
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/**
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* @brief XOR RC4 stream to given data with skip-stream-start
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*
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* @key: RC4 key
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* @keylen: RC4 key length
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* @skip: number of bytes to skip from the beginning of the RC4 stream
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* @data: data to be XOR'ed with RC4 stream
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* @data_len: buf length
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* Returns: 0 on success, -1 on failure
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*
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* Generate RC4 pseudo random stream for the given key, skip beginning of the
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* stream, and XOR the end result with the data buffer to perform RC4
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* encryption/decryption.
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*/
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typedef int (*esp_rc4_skip_t)(const unsigned char *key, unsigned int keylen, unsigned int skip,
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unsigned char *data, unsigned int data_len);
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/**
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* @brief MD5 hash for data vector
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*
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* @num_elem: Number of elements in the data vector
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* @addr: Pointers to the data areas
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* @len: Lengths of the data blocks
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* @mac: Buffer for the hash
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* Returns: 0 on success, -1 on failure
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*/
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typedef int (*esp_md5_vector_t)(unsigned int num_elem, const unsigned char *addr[], const unsigned int *len,
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unsigned char *mac);
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/**
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* @brief Encrypt one AES block
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*
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* @ctx: Context pointer from aes_encrypt_init()
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* @plain: Plaintext data to be encrypted (16 bytes)
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* @crypt: Buffer for the encrypted data (16 bytes)
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*/
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typedef void (*esp_aes_encrypt_t)(void *ctx, const unsigned char *plain, unsigned char *crypt);
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/**
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* @brief Initialize AES for encryption
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*
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* @key: Encryption key
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* @len: Key length in bytes (usually 16, i.e., 128 bits)
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* Returns: Pointer to context data or %NULL on failure
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*/
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typedef void * (*esp_aes_encrypt_init_t)(const unsigned char *key, unsigned int len);
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/**
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* @brief Deinitialize AES encryption
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*
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* @ctx: Context pointer from aes_encrypt_init()
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*/
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typedef void (*esp_aes_encrypt_deinit_t)(void *ctx);
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/**
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* @brief Decrypt one AES block
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*
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* @ctx: Context pointer from aes_encrypt_init()
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* @crypt: Encrypted data (16 bytes)
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* @plain: Buffer for the decrypted data (16 bytes)
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*/
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typedef void (*esp_aes_decrypt_t)(void *ctx, const unsigned char *crypt, unsigned char *plain);
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/**
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* @brief Initialize AES for decryption
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*
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* @key: Decryption key
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* @len: Key length in bytes (usually 16, i.e., 128 bits)
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* Returns: Pointer to context data or %NULL on failure
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*/
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typedef void * (*esp_aes_decrypt_init_t)(const unsigned char *key, unsigned int len);
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/**
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* @brief Deinitialize AES decryption
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*
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* @ctx: Context pointer from aes_encrypt_init()
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*/
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typedef void (*esp_aes_decrypt_deinit_t)(void *ctx);
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2020-04-29 12:59:39 +00:00
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/**
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* @brief One-Key CBC MAC (OMAC1) hash with AES-128 for MIC computation
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*
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* @key: 128-bit key for the hash operation
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* @data: Data buffer for which a MIC is computed
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* @data_len: Length of data buffer in bytes
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* @mic: Buffer for MIC (128 bits, i.e., 16 bytes)
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* Returns: 0 on success, -1 on failure
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*/
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typedef int (*esp_omac1_aes_128_t)(const uint8_t *key, const uint8_t *data, size_t data_len,
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uint8_t *mic);
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/**
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* @brief Decrypt data using CCMP (Counter Mode CBC-MAC Protocol OR
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* Counter Mode Cipher Block Chaining Message Authentication
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* Code Protocol) which is used in IEEE 802.11i RSN standard.
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* @tk: 128-bit Temporal Key for obtained during 4-way handshake
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* @hdr: Pointer to IEEE802.11 frame headeri needed for AAD
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* @data: Pointer to encrypted data buffer
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* @data_len: Encrypted data length in bytes
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* @decrypted_len: Length of decrypted data
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* Returns: Pointer to decrypted data on success, NULL on failure
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*/
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typedef uint8_t * (*esp_ccmp_decrypt_t)(const uint8_t *tk, const uint8_t *ieee80211_hdr,
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const uint8_t *data, size_t data_len, size_t *decrypted_len);
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/**
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* @brief Encrypt data using CCMP (Counter Mode CBC-MAC Protocol OR
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* Counter Mode Cipher Block Chaining Message Authentication
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* Code Protocol) which is used in IEEE 802.11i RSN standard.
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* @tk: 128-bit Temporal Key for obtained during 4-way handshake
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* @frame: Pointer to IEEE802.11 frame including header
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* @len: Length of the frame including header
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* @hdrlen: Length of the header
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* @pn: Packet Number counter
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* @keyid: Key ID to be mentioned in CCMP Vector
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* @encrypted_len: Length of the encrypted frame including header
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*/
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typedef uint8_t * (*esp_ccmp_encrypt_t)(const uint8_t *tk, uint8_t *frame, size_t len, size_t hdrlen,
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uint8_t *pn, int keyid, size_t *encrypted_len);
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2017-08-01 14:29:16 +00:00
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/**
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* @brief The crypto callback function structure used when do station security connect.
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* The structure can be set as software crypto or the crypto optimized by ESP32
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* hardware.
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*/
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typedef struct {
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2018-05-29 12:25:20 +00:00
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uint32_t size;
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uint32_t version;
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2017-08-01 14:29:16 +00:00
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esp_aes_wrap_t aes_wrap; /**< station connect function used when send EAPOL frame */
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esp_aes_unwrap_t aes_unwrap; /**< station connect function used when decrypt key data */
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esp_hmac_sha256_vector_t hmac_sha256_vector; /**< station connect function used when check MIC */
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esp_sha256_prf_t sha256_prf; /**< station connect function used when check MIC */
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2017-10-19 09:42:55 +00:00
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esp_hmac_md5_t hmac_md5;
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esp_hmac_md5_vector_t hamc_md5_vector;
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esp_hmac_sha1_t hmac_sha1;
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esp_hmac_sha1_vector_t hmac_sha1_vector;
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esp_sha1_prf_t sha1_prf;
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esp_sha1_vector_t sha1_vector;
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esp_pbkdf2_sha1_t pbkdf2_sha1;
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esp_rc4_skip_t rc4_skip;
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esp_md5_vector_t md5_vector;
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esp_aes_encrypt_t aes_encrypt;
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esp_aes_encrypt_init_t aes_encrypt_init;
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esp_aes_encrypt_deinit_t aes_encrypt_deinit;
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esp_aes_decrypt_t aes_decrypt;
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esp_aes_decrypt_init_t aes_decrypt_init;
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esp_aes_decrypt_deinit_t aes_decrypt_deinit;
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2020-04-29 12:59:39 +00:00
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esp_omac1_aes_128_t omac1_aes_128;
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esp_ccmp_decrypt_t ccmp_decrypt;
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esp_ccmp_encrypt_t ccmp_encrypt;
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2017-08-01 14:29:16 +00:00
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}wpa_crypto_funcs_t;
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2018-02-27 10:22:20 +00:00
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/**
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* @brief The crypto callback function structure used in mesh vendor IE encryption. The
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* structure can be set as software crypto or the crypto optimized by ESP32
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* hardware.
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*/
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typedef struct{
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esp_aes_128_encrypt_t aes_128_encrypt; /**< function used in mesh vendor IE encryption */
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esp_aes_128_decrypt_t aes_128_decrypt; /**< function used in mesh vendor IE decryption */
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} mesh_crypto_funcs_t;
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2017-08-01 14:29:16 +00:00
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#ifdef __cplusplus
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}
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#endif
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#endif
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