How to print SHA512 hash in C [duplicate]

问题

This question already has answers here:

Calculate and print SHA256 hash of a file using OpenSSL (2 answers)

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I have the following code to calculate the sha512 hash:

#include <stdio.h>
#include <string.h>
#include <openssl/sha.h>

int main() {
    char *password = "test";
    char hash[SHA512_DIGEST_LENGTH];

    SHA512(password, strlen(password), hash);

    return 0;
}

How to print out the calculated hash in hex?

Thanks

回答1:

Change hash to be unsigned char hash[SHA512_DIGEST_LENGTH]. Then:

for(int i = 0; i < SHA512_DIGEST_LENGTH; ++i) {
   printf("%02x", hash[i]);
}

来源：https://stackoverflow.com/questions/36381509/how-to-print-sha512-hash-in-c