firstcompile_sss.ino

#include<ssss.h>
#include<Entropy.h>
#include <gf256.h> // Not Used

FamilyId id = {5, 2};
Ssss s;

void setup() {
  Serial.begin(9600);
  Entropy.initialize();
  uint8_t privateKey[30] = 
  {224, 181, 214, 219, 12, 53, 89, 154, 24, 137, 252, 189, 224, 203, 126, 98, 76, 163, 46, 126, 149, 108, 18, 109, 239, 225, 130, 7, 52, 212};
  uint8_t *share1=NULL;
  uint8_t *share2=NULL;
  uint8_t *share3=NULL;
  uint8_t *share4=NULL;
  uint8_t *share5=NULL;

  // Shuffle Mode
  s.LoadState();
  s.setFamily(27); // unique family id
  s.setThreshold(2); // min number of shares required
  s.setPayload(30);
  s.beginShuffle();

  bool entropyMax = false;
  while(!entropyMax) {
    entropyMax = s.addEntropy(Entropy.randomByte()); // provide sufficient entropy
  }
  s.addSecret(privateKey); 
  
  // Deal Mode
  s.beginDeal(); // begin deal mode
  // Each share has 2 extra bytes as it has 2 extra metadata -> `family id` & `threshold`
  uint8_t buffer[32]; // Using buffer to get shares
  
  s.dealNextShare(buffer);
  share1 = buffer;
  Serial.print("Share 1: {");
  for(int i = 0; i < 32; i++) {
    Serial.print(share1[i]);
    Serial.print(", ");
  }
  Serial.println("}");
  
  s.dealNextShare(buffer);
  share2 = buffer;
  Serial.print("Share 2: {");
  for(int i = 0; i < 32; i++) {
    Serial.print(share2[i]);
    Serial.print(", ");
  }
  Serial.println("}");
  
  s.dealNextShare(buffer);
  share3 = buffer;
  Serial.print("Share 3: {");
  for(int i = 0; i < 32; i++) {
    Serial.print(share3[i]);
    Serial.print(", ");
  }
  Serial.println("}");
  
  s.dealNextShare(buffer);
  share4 = buffer;
  Serial.print("Share 4: {");
  for(int i = 0; i < 32; i++) {
    Serial.print(share4[i]);
    Serial.print(", ");
  }
  Serial.println("}");
  
  s.dealNextShare(buffer);
  share5 = buffer;
  Serial.print("Share 5: {");
  for(int i = 0; i < 32; i++) {
    Serial.print(share5[i]);
    Serial.print(", ");
  }
  Serial.println("}");

  Serial.print("\nNumber of Shares Dealt: ");
  Serial.println(s.getShares()); // to get number of shares
  s.clear(); // writes sensitive bytes with 0s and sets device in NoMode

  // Collect Mode
  s.setSharePayloadLength(32);
  s.beginCollect();
  s.addShare(share1);
  s.addShare(share2);
  s.addShare(share3);
  s.addShare(share4);
  s.addShare(share5);
//  Serial.println(s.secretAvailable());

  // Reveal Mode
  s.beginReveal();
  s.getSecret(buffer);

  Serial.print("\n\nSecret : {");
  for(int i = 0; i < 30; i++) {
    Serial.print(buffer[i]);
    Serial.print(", ");
  }
  Serial.println("}");
}

void loop() {
  // put your main code here, to run repeatedly:
}