78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
// 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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#include "crypto/includes.h"
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#include "crypto/common.h"
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#include "crypto/aes.h"
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#include "crypto/aes_wrap.h"
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#include "mbedtls/aes.h"
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/**
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* fast_aes_128_cbc_encrypt - AES-128 CBC encryption
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* @key: Encryption key
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* @iv: Encryption IV for CBC mode (16 bytes)
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* @data: Data to encrypt in-place
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* @data_len: Length of data in bytes (must be divisible by 16)
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* Returns: 0 on success, -1 on failure
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*/
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int
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fast_aes_128_cbc_encrypt(const uint8_t *key, const uint8_t *iv, uint8_t *data, size_t data_len)
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{
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int ret = 0;
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mbedtls_aes_context ctx;
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uint8_t cbc[AES_BLOCK_SIZE];
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mbedtls_aes_init(&ctx);
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ret = mbedtls_aes_setkey_enc(&ctx, key, 128);
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if(ret < 0) {
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mbedtls_aes_free(&ctx);
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return ret;
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}
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os_memcpy(cbc, iv, AES_BLOCK_SIZE);
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ret = mbedtls_aes_crypt_cbc(&ctx, MBEDTLS_AES_ENCRYPT, data_len, cbc, data, data);
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mbedtls_aes_free(&ctx);
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return ret;
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}
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/**
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* fast_aes_128_cbc_decrypt - AES-128 CBC decryption
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* @key: Decryption key
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* @iv: Decryption IV for CBC mode (16 bytes)
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* @data: Data to decrypt in-place
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* @data_len: Length of data in bytes (must be divisible by 16)
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* Returns: 0 on success, -1 on failure
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*/
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int
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fast_aes_128_cbc_decrypt(const uint8_t *key, const uint8_t *iv, uint8_t *data, size_t data_len)
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{
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int ret = 0;
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mbedtls_aes_context ctx;
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uint8_t cbc[AES_BLOCK_SIZE];
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mbedtls_aes_init(&ctx);
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ret = mbedtls_aes_setkey_dec(&ctx, key, 128);
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if(ret < 0) {
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mbedtls_aes_free(&ctx);
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return ret;
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}
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os_memcpy(cbc, iv, AES_BLOCK_SIZE);
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ret = mbedtls_aes_crypt_cbc(&ctx, MBEDTLS_AES_DECRYPT, data_len, cbc, data, data);
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mbedtls_aes_free(&ctx);
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return ret;
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}
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