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RKSV logic as PHP implementation (wrapped into a html page with a test scenario)
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| <html> | |
| <head> | |
| <title>RKSV PHP Funktionen</title> | |
| </head> | |
| <body> | |
| <h1>RKSV PHP Funktionen in PHP </h1> | |
| <p> 31.1.2017 as per <a href="https://github.com/a-sit-plus/at-registrierkassen-mustercode/issues/220#issuecomment-276019670">github comment thread</a></p> | |
| <?php | |
| $aeskey = "WQRtiiya3hYh/Uz44Bv3x8ETl1nrH6nCdErn69g5/lU="; | |
| // case 1 | |
| $kassenid = "CashBox01"; | |
| $belegnummer = "00000001"; | |
| $umsatz = 5509; | |
| // case 2 | |
| //$kassenid = "CASHBOX-DEMO-1"; | |
| //$belegnummer = "-Receipt-ID-571"; | |
| //$umsatz = 38741; | |
| $aes = new RKSVAES256CTR( $aeskey ); | |
| $iv = $aes->GenerateIV( $kassenid, $belegnummer, false ); | |
| $iv64 = $aes->getb64($iv); | |
| $umsatz_encode = $aes->encodeUmsatz($umsatz); | |
| $umsatz_encode_64 = $aes->getb64($umsatz_encode); | |
| $umsatz_aes_encrypt = $aes->encryptAESUmsatz( $umsatz, $kassenid, $belegnummer ); | |
| $umsatz_aes_decrypt = $aes->decryptAESUmsatz( $umsatz_aes_encrypt, $kassenid, $belegnummer ); | |
| echo "<h2> Input</h2>"; | |
| echo "aeskey: ".$aeskey."<br/>"; | |
| echo "aesmethod: ".$aes->AESMethod."<br/>"; | |
| echo "kassenid: ".$kassenid."<br/>"; | |
| echo "belegnr: ".$belegnummer."<br/>"; | |
| echo "umsatz: ".$umsatz."<br/><br/>"; | |
| echo "<h2>Encode & Encrypt Umsatz</h2>"; | |
| echo "IV: ".$iv."<br/>"; | |
| echo "IV64: ".$iv64."<br/>"; | |
| echo "encoded umsatz: ".$umsatz_encode."<br/>"; | |
| echo "encoded umsatz 64: ".$umsatz_encode_64."<br/>"; | |
| echo "encrypted umsatz: ".$umsatz_aes_encrypt."<br/>"; | |
| echo "<h2>Decrypt Umsatz</h2>"; | |
| echo "decrypted umsatz: ".$umsatz_aes_decrypt."<br/>"; | |
| class RKSVAES256CTR | |
| { | |
| //var $AESMethod = 'AES-256-ECB'; | |
| var $AESMethod = 'AES-256-CFB'; | |
| function __construct( $key ) { | |
| $this->AESKey = $key; | |
| } | |
| function GenerteAESKey() { | |
| $nbytes = openssl_random_pseudo_bytes(32); | |
| $test = base64_encode( $nbytes ); | |
| return $test; | |
| } | |
| function encryptAESUmsatz( $umsatz, $kassenid, $nr ) { | |
| $iv = $this->GenerateIV( $kassenid, $nr ); | |
| $key_bin = base64_decode( $this->AESKey ); | |
| $data = $this->encodeUmsatz( $umsatz ); | |
| $encoded = openssl_encrypt($data, $this->AESMethod, $key_bin, OPENSSL_ZERO_PADDING, $iv); | |
| return $encoded; | |
| } | |
| function decryptAESUmsatz( $umsatz, $kassenid, $nr ) { | |
| $iv = $this->GenerateIV( $kassenid, $nr, true ); //bytes = ok | |
| $key_bin = base64_decode( $this->AESKey ); //bytes = Ok | |
| $ret = openssl_decrypt( $umsatz, $this->AESMethod, $key_bin, OPENSSL_ZERO_PADDING, $iv ); | |
| return $this->decodeUmsatz( $ret ); | |
| } | |
| function decodeUmsatz( $in ) { | |
| $bytes = $this->getBytes( $in ); | |
| $nbytes = array_reverse( $bytes ); | |
| //http://stackoverflow.com/questions/12683833/how-to-convert-byte-array-to-integer-in-php | |
| $umsatz = ($nbytes[3]<<24) + ($nbytes[2]<<16) + ($nbytes[1]<<8) + $nbytes[0]; | |
| return $umsatz; | |
| } | |
| function encodeUmsatz( $in ) { | |
| $umsatzBytes = $this->getBytes( $in ); | |
| for( $i=count( $umsatzBytes ); $i<16; $i++ ) { | |
| $umsatzBytes[] =0; | |
| } | |
| $ret = array_reverse( $umsatzBytes ); | |
| $text = $this->getText2( $ret ); | |
| return $text; | |
| } | |
| function getb64( $text ) { | |
| return base64_encode($text); | |
| } | |
| function GenerateIV( $kassenid, $belegnummer, $debug = false ) { | |
| $in = $kassenid . $belegnummer; | |
| $hash = substr( hash('sha256', $in, true), 0, 16 ); | |
| return $hash; | |
| } | |
| function getText2( $in ) { | |
| //bytes to text | |
| $ret = ""; | |
| foreach( $in as $item ) $ret .= chr( $item ); | |
| return $ret; | |
| } | |
| function getBytes( $in ) { | |
| //text / numeric to bytes | |
| if( is_numeric( $in ) ) { | |
| return unpack("C*", pack("L", $in ) ); | |
| } else { | |
| for($i = 0; $i < strlen($in); $i++) { | |
| $ret[] = ord( substr( $in, $i, 1 ) ); | |
| } | |
| return $ret; | |
| } | |
| } | |
| } | |
| ?> | |
| </body> | |
| </html> |
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Hallo
danke für die Unterstützung. Was empfehlen Sie für die Signatur?