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/* $Id: sha512.c 4 2024-08-20 21:10:25Z nishi $ */

#include "rv_sha512.h"

#include <openssl/sha.h>

#include <stdlib.h>
#include <string.h>

char* rv_sha512(const char* string) {
        const char hex[] = "0123456789abcdef";
        unsigned char* hash = malloc(SHA512_DIGEST_LENGTH);
        SHA512((const unsigned char*)string, strlen(string), hash);
        char* str = malloc(512 / 4 + 1);
        int i;
        for(i = 0; i < 512 / 8; i++) {
                str[2 * i + 0] = hex[(hash[i] >> 4) & 0xf];
                str[2 * i + 1] = hex[(hash[i] & 0xf)];
        }
        free(hash);
        return str;
}