34 lines
913 B
C
34 lines
913 B
C
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/*
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* Wrapper around mbedtls to provide AES encryption
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*
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* Needs esp32 arduino platform libraries
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*
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* Hesham T. Banafa
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* May 9th, 2022
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*
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*/
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#include <string.h>
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#include "encryption.h"
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static int valid_time(long long time_epoch);
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extern void aes_init(aes_t *ctx, char *key)
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{
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mbedtls_aes_init(&ctx->aes_ctx);
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//mbedtls_aes_setkey_enc(ctx->aes_ctx, (const unsigned char*)key, strlen(key) * 8 );
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ctx->psk_key = key; // Save key ptr
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}
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extern void aes_encrypt(aes_t *ctx, char *plain_text, char *out_buf)
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{
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if (ctx == NULL) return; // What are you doing? out_buf remains as is.
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mbedtls_aes_setkey_enc(&ctx->aes_ctx, (const unsigned char*)ctx->psk_key, strlen(ctx->psk_key) * 8 );
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mbedtls_aes_crypt_ecb(&ctx->aes_ctx, MBEDTLS_AES_ENCRYPT, (const unsigned char*)plain_text, (unsigned char*)out_buf);
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}
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extern void aes_decrypt(aes_t *ctx, char *cipher_text, char *out_buf)
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{
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}
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