Re: MySQL AES Encryption with CBC mode

Hello JayBee,

I have never used MySQL for this kind of purposes, but from you description I think you are looking for this module (Crypt::Rijndael ).

From the documentation (blocksize):

The blocksize for Rijndael is 16 bytes (128 bits), although the algori
+thm actually supports any blocksize that is any multiple of our bytes
+. 128 bits, is however, the AES-specified block size, so this is all 
+we support.
[download]

$cipher = Crypt::Rijndael->new( $key [, $mode] )

Create a new Crypt::Rijndael cipher object with the given key (which m
+ust be 128, 192 or 256 bits long). The additional $mode argument is t
+he encryption mode, either MODE_ECB (electronic codebook mode, the de
+fault), MODE_CBC (cipher block chaining, the same that Crypt::CBC doe
+s), MODE_CFB (128-bit cipher feedback), MODE_OFB (128-bit output feed
+back), or MODE_CTR (counter mode).
[download]

Update: Hello again, I wrote a script to replicate the error of your script. I think you are missing the backslash on \ on the @ mysql commands. See example bellow.

#!/usr/bin/perl
use DBI;
use strict;
use warnings;
use Data::Dumper;
use Config::Simple;

$|=1; #flush every time the program

my $path = 'conf.ini';
my %config = ();
my $checkExist = "";

sub mysql {
    Config::Simple->import_from("".$path."", \%config)
    or die Config::Simple->error();

    my $dbh = DBI->connect("dbi:mysql::".$config{'MySQL.host'}.":".$co
+nfig{'MySQL.port'}."", 
               "".$config{'MySQL.user'}."",
               "".$config{'MySQL.pass'}."",
               { 'PrintError' => 1, 'RaiseError' => 1 , 'AutoInactiveD
+estroy' => 1 } 
    ) or die "Could not connect to ". $config{'MySQL.host'} .": ". $DB
+I::errstr ."\n";

    my $databases = $dbh->do("SHOW DATABASES LIKE '".$config{'MySQL.db
+'}."'")
    or die "Error: " .dbh->errstr. "\n";

    if ($databases eq 1) {
    printf "Database: ". $config{'MySQL.db'} ." exists not creating: "
+. $config{'MySQL.db'} ."\n";
    }
    else {
    printf "Database: ". $config{'MySQL.db'} ." does not exist creatin
+g: ". $config{'MySQL.db'} ."\n";

    $checkExist = $dbh->do("CREATE DATABASE IF NOT EXISTS `".$config{'
+MySQL.db'}."`")
        or die "Could not create the: ".$config{'MySQL.db'}." error: "
+. $dbh->errstr ."\n";
    } # End of else

    $dbh->do("USE ".$config{'MySQL.db'}."")
    or die "Error: " .dbh->errstr. "\n";

    my $tables = $dbh->do("SHOW TABLES FROM `".$config{'MySQL.db'}."`
              WHERE Tables_in_".$config{'MySQL.db'}." LIKE
              '".$config{'MySQL.table'}."'")
    or die "Error: ".dbh->errstr. "\n";

    if ($tables eq 1) {
    printf "Table: ".$config{'MySQL.table'}." exists not creating: ".$
+config{'MySQL.table'}."\n";
    }
    else {
    printf "Table: ".$config{'MySQL.table'}." does not exist creating:
+ ".$config{'MySQL.table'}."\n";

    $checkExist = $dbh->prepare("CREATE TABLE IF NOT EXISTS `".$config
+{'MySQL.table'}."` (
                    `id` int(11) NOT NULL AUTO_INCREMENT,
                    `UnixTime` int(11) NOT NULL,
                    `losses` int(11) NOT NULL,
                    PRIMARY KEY (`id`)
                    ) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREM
+ENT=1 ;");

    if (!$checkExist->execute()) {
        die "Error: ". $checkExist->errstr ."\n";
    }
    } # End of else

    $checkExist = $dbh->prepare("SELECT \@\@session.block_encryption_m
+ode = 'aes-128-ecb';");

    if (!$checkExist->execute()) {
    die "Error: ". $checkExist->errstr ."\n";
    }

    my $range = 50;
    my $minimum = 100;

    my $random_number = int(rand($range)) + $minimum;
    my $time = time();

    my $losses = $time . ' ' . $random_number;

    $checkExist = $dbh->prepare("INSERT IGNORE INTO `".$config{'MySQL.
+table'}.
                "` (`UnixTime`, `losses`) VALUES
                ('".$time."','".$random_number."') ");

    if (!$checkExist->execute()) {
    die "Error: ". $checkExist->errstr ."\n";
    }

    my $statement = "SELECT * FROM `".$config{'MySQL.table'}."` WHERE 
+1";

    my $hash_ref = $dbh->selectall_hashref($statement, 'id');

    $checkExist->finish();

    $dbh->disconnect()
    or warn "Error disconnecting: $DBI::errstr\n";

    return $hash_ref;

} # End of mysql sub

my $output_ref = mysql();

print Dumper($output_ref);

__DATA__

$ perl mysql.pl
Database: PerlMonks does not exist creating: PerlMonks
Table: Data does not exist creating: Data
$VAR1 = {
          '1' => {
                   'losses' => 128,
                   'UnixTime' => 1494975837,
                   'id' => 1
                 }
        };
[download]

Update2: Sample of conf.ini for replication purposes:

[MySQL]
user=user
pass=password
host=localhost
port=3306
db=PerlMonks
table=Data
[download]

Hope this helps.

Seeking for Perl wisdom...on the process of learning...not there...yet!

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