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58 lines
1.5 KiB
58 lines
1.5 KiB
//
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// Created by o.likhogub on 10/7/2023.
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//
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#include "TransmissionModule.h"
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#define MSG_LENGTH 5
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#define ECC_LENGTH 4
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#define TOTAL_LENGTH (MSG_LENGTH + ECC_LENGTH)
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void TransmissionModule::transmit(MeasureData &data)
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{
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size_t posn, len, inc = 5;
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size_t data_size = 4;
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cipher->clear();
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cipher->setKey(encryptionKey, key_size);
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cipher->setIV(iv, iv_size);
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memset(buffer, 0xBA, sizeof(buffer));
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for (posn = 0; posn < auth_size; posn += inc) {
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len = auth_size - posn;
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if (len > inc)
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len = inc;
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cipher->addAuthData(authdata + posn, len);
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}
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cipher->encrypt(buffer + 1, (uint8_t*)&data, data_size);
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buffer[0] = data.sensor_id;
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//*************************
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//Encryption Testing
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//*************************
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// byte buffer2[MAX_PLAINTEXT_LEN];
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// memset(buffer2, 0xBA, sizeof(buffer));
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// cipher->setKey(encryptionKey, 16);
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// cipher->setIV(iv, iv_size);
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// for (posn = 0; posn < data_size; posn += inc) {
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// len = data_size - posn;
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// if (len > inc)
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// len = inc;
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// cipher->decrypt(buffer2 + posn, buffer + posn, len);
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// }
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// if (memcmp(buffer2, (uint8_t*)&data + 1, data_size) != 0) {
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// Serial.println("doesn't work");
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// } else{
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// Serial.println("works");
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// }
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uint8_t encoded[MSG_LENGTH + ECC_LENGTH];
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reedSolomonModule->encode(buffer, encoded);
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transmitterModule->send(encoded, MSG_LENGTH + ECC_LENGTH);
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}
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