In the previous article we showed how to generate Hash with MD5, as described there, the concepts will be similar.
Whirlpool (sometimes called WHIRLPOOL ) is a cryptographic hash function based on an AES block cipher.
It generates a hash of length of 128 characters.
Using with C++
For this example, we are going to hash the word Terminal Root . Follow the code below:
whirlpool.cpp
#include <iostream>
#include <iomanip>
#include <sstream>
#include <openssl/whrlpool.h>
std::string whirlpool(const std::string &str){
unsigned char hash[WHIRLPOOL_DIGEST_LENGTH];
WHIRLPOOL_CTX whirlpool;
WHIRLPOOL_Init(&whirlpool);
WHIRLPOOL_Update(&whirlpool, str.c_str(), str.size());
WHIRLPOOL_Final(hash, &whirlpool);
std::stringstream ss;
for(int i = 0; i < WHIRLPOOL_DIGEST_LENGTH; i++){
ss << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>( hash[i] );
}
return ss.str();
}
int main() {
std::cout << whirlpool("Terminal Root") << '\n';
return 0;
}To compile, run:
g++ whirlpool.cpp -lcryptoThe possible and expected output will be:
edef01c730c67430584283292a59e3a6e910ecf7c903c0b1040243498c67053a849c0eacc07dfdbd76be36d2d1e50eaa0e0b6324f96743828eccdf8dac471891To check if it is correct, use the rhash command with the following arguments:
rhash --whirlpool -m "Terminal Root"Links úteis
- https://www.openssl.org/docs/man3.0/man3/EVP_whirlpool.html
- https://en.wikipedia.org/wiki/Whirlpool_(hash_function)
- https://en.wikipedia.org/wiki/Advanced_Encryption_Standard
