HASH MD5 D'UNE CHAINE OU D'UN FICHIER (DE TAILLE QUELCONQUES) {VC++ 7.0}

char *md5_str(char *p)
{
    md5_state_t state;
    md5_byte_t digest[16];
    char *hex_output = (char *)malloc(33);
    int di;
    
    //hashage
    md5_init(&state);
    md5_append(&state, p, strlen(p));
    md5_finish(&state, digest);
    
    //output
    for (di = 0; di < 16; di++){
	    sprintf(hex_output + di * 2, "%02x", digest[di]);
    }    
    return hex_output;
}

char *md5_file(FILE *fp)
{
    md5_state_t state;
    md5_byte_t digest[16];
    char *hex_output = (char *)malloc(33);
    char data[64];
    int di, ln;
    
    //hashage
    md5_init(&state);
    while(!feof(fp))
    {
        ln = fread(data, 1, sizeof(data), fp);
        md5_append(&state, data, ln);
    }
    md5_finish(&state, digest);
    
    //output
    for (di = 0; di < 16; di++){
	    sprintf(hex_output + di * 2, "%02x", digest[di]);
    }    
    return hex_output;
}

int filecmp(FILE *f1, FILE *f2)
{
    char hash1[33], hash2[33];
    strcpy(hash1, md5_file(f1));
    strcpy(hash2, md5_file(f2));
    return strcmp(hash1, hash2);
}