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#include <iostream> | |
#include <iomanip> | |
#include <sstream> | |
#include <string> | |
#include <vector> | |
#include <stdlib.h> | |
#include <stdio.h> | |
#include <openssl/sha.h> | |
#include <unistd.h> // for sleep | |
using namespace std; | |
vector<char> hexToBytes(const string& hex) { | |
vector<char> bytes; | |
for (unsigned int i = 0; i < hex.length(); i += 2) { | |
string byteString = hex.substr(i, 2); | |
char byte = (char) strtol(byteString.c_str(), NULL, 16); | |
bytes.push_back(byte); | |
} | |
return bytes; | |
} | |
string sha256(const string str) | |
{ | |
// unsigned int SHA256_DIGEST_LENGTH = 256; | |
unsigned char hash[SHA256_DIGEST_LENGTH]; | |
SHA256_CTX sha256; | |
SHA256_Init(&sha256); | |
SHA256_Update(&sha256, str.c_str(), str.size()); | |
SHA256_Final(hash, &sha256); | |
stringstream ss; | |
for(int i = 0; i < SHA256_DIGEST_LENGTH; i++) | |
{ | |
ss << hex << setw(2) << setfill('0') << (int)hash[i]; | |
} | |
return ss.str(); | |
} | |
string sha256(const vector<char> inputBuf) | |
{ | |
// unsigned int SHA256_DIGEST_LENGTH = 256; | |
unsigned char hash[SHA256_DIGEST_LENGTH]; | |
SHA256_CTX sha256; | |
SHA256_Init(&sha256); | |
SHA256_Update(&sha256, inputBuf.data(), inputBuf.size()); | |
SHA256_Final(hash, &sha256); | |
stringstream ss; | |
for(int i = 0; i < SHA256_DIGEST_LENGTH; i++) | |
{ | |
ss << hex << setw(2) << setfill('0') << (int)hash[i]; | |
} | |
return ss.str(); | |
} | |
int main() { | |
string input = "0100000081cd02ab7e569e8bcd9317e2fe99f2de44d49ab2b8851ba4a308000000000000e320b6c2fffc8d750423db8b1eb942ae710e951ed797f7affc8892b0f1fc122bc7f5d74df2b9441a42a14695"; | |
while(true) { | |
cout << sha256(hexToBytes(input)) << endl; | |
cout << sha256(hexToBytes(sha256(hexToBytes(input)))) << endl; | |
usleep(1000000); | |
} | |
return 0; | |
} |
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Notes
sudo apt-get install libssl-dev
foropenssl/sha.h