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encryption: scrapped attempt for BT encryption on esp32

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Signed-off-by: HeshamTB <hishaminv@gmail.com>
This commit is contained in:
HeshamTB 2022-06-07 14:43:43 +03:00
parent e45e335d50
commit 2d7ba032a8
Signed by: Hesham
GPG Key ID: 74876157D199B09E
2 changed files with 57 additions and 0 deletions
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33
encryption/encryption.c Normal file
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/*
* Wrapper around mbedtls to provide AES encryption
*
* Needs esp32 arduino platform libraries
*
* Hesham T. Banafa
* May 9th, 2022
*
*/
#include <string.h>
#include "encryption.h"
static int valid_time(long long time_epoch);
extern void aes_init(aes_t *ctx, char *key)
{
mbedtls_aes_init(&ctx->aes_ctx);
//mbedtls_aes_setkey_enc(ctx->aes_ctx, (const unsigned char*)key, strlen(key) * 8 );
ctx->psk_key = key; // Save key ptr
}
extern void aes_encrypt(aes_t *ctx, char *plain_text, char *out_buf)
{
if (ctx == NULL) return; // What are you doing? out_buf remains as is.
mbedtls_aes_setkey_enc(&ctx->aes_ctx, (const unsigned char*)ctx->psk_key, strlen(ctx->psk_key) * 8 );
mbedtls_aes_crypt_ecb(&ctx->aes_ctx, MBEDTLS_AES_ENCRYPT, (const unsigned char*)plain_text, (unsigned char*)out_buf);
}
extern void aes_decrypt(aes_t *ctx, char *cipher_text, char *out_buf)
{
}

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encryption/encryption.h Normal file
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/*
* Wrapper around mbedtls to provide AES encryption
*
* Needs esp32 arduino platform libraries
*
* Hesham T. Banafa
* May 9th, 2022
*
*/
#include "mbedtls/aes.h"
typedef struct aes_t
{
const char *psk_key;
mbedtls_aes_context aes_ctx;
} aes_t;
static int valid_time(long long time_epoch);
extern void aes_init(aes_t *ctx, char *key);
extern void aes_encrypt(aes_t *ctx, char *plain_text, char *out_buf);
extern void aes_decrypt(aes_t *ctx, char *cipher_text, char *out_buf);