convert.php<\/strong><\/p>\n<?php\r\n\/*\r\n * convert.php\r\n * \r\n * Copyright 2011 Ahmad Zafrullah Mardiansyah <zaf@zaf-laptop>\r\n * \r\n * This program is free software; you can redistribute it and\/or modify\r\n * it under the terms of the GNU General Public License as published by\r\n * the Free Software Foundation; either version 2 of the License, or\r\n * (at your option) any later version.\r\n * \r\n * This program is distributed in the hope that it will be useful,\r\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\r\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r\n * GNU General Public License for more details.\r\n * \r\n * You should have received a copy of the GNU General Public License\r\n * along with this program; if not, write to the Free Software\r\n * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,\r\n * MA 02110-1301, USA.\r\n *\/\r\n \r\nfunction char_to_dec($a){\r\n\t$i=ord($a);\r\n\tif ($i>=97 && $i<=122){\r\n\t\treturn ($i-96);\r\n\t} else if ($i>=65 && $i<=90){\r\n\t\treturn ($i-38);\r\n\t} else {\r\n\t\treturn null;\r\n\t}\r\n}\r\n\r\nfunction dec_to_char($a){\r\n\tif ($a>=1 && $a<=26){\r\n\t\treturn (chr($a+96));\r\n\t} else if ($a>=27 && $a<=52){\r\n\t\treturn (chr($a+38));\r\n\t} else {\r\n\t\treturn null;\r\n\t}\r\n}\r\n\r\nfunction tabel_vigenere_encrypt($a, $b){\r\n\t$i=$a+$b-1;\r\n\tif ($i>26){\r\n\t\t$i=$i-26;\r\n\t}\r\n\treturn (dec_to_char($i));\r\n}\r\nfunction tabel_vigenere_decrypt($a, $b){\r\n\t$i=$a-$b+1;\r\n\tif ($i<1){\r\n\t\t$i=$i+26;\r\n\t}\r\n\treturn (dec_to_char($i));\r\n}\r\n\r\n?><\/pre>\n
\nkemudian untuk\u00a0 index.php<\/strong> nya<\/p>\n<?php\r\n\/*\r\n * index.php\r\n * \r\n * Copyright 2011 Ahmad Zafrullah Mardiansyah <zaf@zaf-laptop>\r\n * \r\n * This program is free software; you can redistribute it and\/or modify\r\n * it under the terms of the GNU General Public License as published by\r\n * the Free Software Foundation; either version 2 of the License, or\r\n * (at your option) any later version.\r\n * \r\n * This program is distributed in the hope that it will be useful,\r\n * but WITHOUT ANY WARRANTY; without even the implied warranty of\r\n * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r\n * GNU General Public License for more details.\r\n * \r\n * You should have received a copy of the GNU General Public License\r\n * along with this program; if not, write to the Free Software\r\n * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,\r\n * MA 02110-1301, USA.\r\n *\/\r\n \r\ninclude "convert.php";\r\n\r\n?>\r\n\r\n<!DOCTYPE html PUBLIC "-\/\/W3C\/\/DTD XHTML 1.0 Strict\/\/EN"\r\n "http:\/\/www.w3.org\/TR\/xhtml1\/DTD\/xhtml1-strict.dtd">\r\n<html xmlns="http:\/\/www.w3.org\/1999\/xhtml" xml:lang="en" lang="en">\r\n\r\n<head>\r\n\t<title>cipher | 23Pstars<\/title>\r\n\t<meta http-equiv="content-type" content="text\/html;charset=utf-8" \/>\r\n\t<meta name="generator" content="Geany 0.18" \/>\r\n\t<style type="text\/css">\r\n\ta:link {color: #000000; text-decoration: none}\r\n\ta:visited {color: #000000; text-decoration: none}\r\n\ta:hover {color: #FF0000; text-decoration: underline}\r\n\t<\/style>\r\n\t<script type="text\/javascript">\r\n\tfunction SelectAll(id){\r\n\t\tdocument.getElementById(id).focus();\r\n\t\tdocument.getElementById(id).select();\r\n\t}\r\n\tfunction Info(){\r\n\t\talert("Original code by :"+'\\n\\n'+"Ahmad Zafrullah Mardiansyah");\r\n\t}\r\n\tfunction InfoCaesar(){\r\n\t\talert("Key hanya berupa kombinasi angka,"+'\\n'+"dan plan text tidak boleh mengandung angka!");\r\n\t}\r\n\tfunction InfoVigenere(){\r\n\t\talert("Key hanya berupa kombinasi kata, tidak boleh mengandung angka,"+'\\n'+"dan plan text tidak boleh mengandung angka!");\r\n\t}\r\n\t<\/script>\r\n<\/head>\r\n\r\n<body>\r\n\t<center>\r\n\t<h2>Simple cipher implementation with PHP<\/h2>\r\n\t<h4><a onclick="Info()">by 23Pstars<\/a><\/h4>\r\n\t<\/center>\r\n\t<table width="600" align="center">\r\n\t<tr><td width="50%" valign="top">\r\n\t<fieldset>\r\n\t<legend><b>Caesar<\/b><\/legend>\r\n\t<form action="" method="post">\r\n\t<input type="text" name="key_caesar" id="key_caesar" value="the key..." onclick="SelectAll('key_caesar')" \/>\r\n\t<input type="submit" value="?" onclick="InfoCaesar()" \/><br\/>\r\n\t<textarea rows="4" name="plantext_caesar" id="plantext_caesar" cols="33" onclick="SelectAll('plantext_caesar')" >plan text...<\/textarea><br\/>\r\n\t<input type="submit" name="encrypt_caesar" value="Encrypt" \/><input type="submit" name="decrypt_caesar" value="Decrypt" \/><input type="reset" value="Reset" \/>\r\n\t<\/form>\r\n\t<\/fieldset>\r\n\t<\/td><td valign="top" colspan="3">\r\n\t<fieldset>\r\n\t<legend><b>Result<\/b><\/legend>\r\n\t<?php\r\n\t\/\/----------------------------------------------------------------\/\/\r\n\t\/\/ caesar\t\t\t\t\t\t\t\t\t\t\t\t\t\t \/\/\r\n\t\/\/----------------------------------------------------------------\/\/\r\n\t\tif((isset($_POST['key_caesar'])) && (isset($_POST['plantext_caesar'])) && isset($_POST['encrypt_caesar'])){\r\n\t\t\t$key=$_POST['key_caesar'];\r\n\t\t\t$plantext=$_POST['plantext_caesar'];\r\n\t\t\t$split_key=str_split($key);\r\n\t\t\t$i=0;\r\n\t\t\t$split_chr=str_split($plantext);\r\n\t\t\twhile ($key>52){\r\n\t\t\t\t$key=$key-52;\r\n\t\t\t}\r\n\t\t\tforeach($split_chr as $chr){\r\n\t\t\t\tif (char_to_dec($chr)!=null){\r\n\t\t\t\t\t$split_nmbr[$i]=char_to_dec($chr);\r\n\t\t\t\t} else {\r\n\t\t\t\t\t$split_nmbr[$i]=$chr;\r\n\t\t\t\t}\r\n\t\t\t\t$i++;\r\n\t\t\t}\r\n\t\t\techo '<textarea rows="4" id="result" cols="33" onclick="SelectAll(\\'result\\')" >';\r\n\t\t\tforeach($split_nmbr as $nmbr){\r\n\t\t\t\tif (($nmbr+$key)>52){\r\n\t\t\t\t\tif (dec_to_char($nmbr)!=null){\r\n\t\t\t\t\t\techo dec_to_char(($nmbr+$key)-52);\r\n\t\t\t\t\t} else {\r\n\t\t\t\t\t\techo $nmbr;\r\n\t\t\t\t\t}\r\n\t\t\t\t} else {\r\n\t\t\t\t\tif (dec_to_char($nmbr)!=null){\r\n\t\t\t\t\t\techo dec_to_char($nmbr+$key);\r\n\t\t\t\t\t} else {\r\n\t\t\t\t\t\techo $nmbr;\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\techo '<\/textarea><br\/>';\r\n\t\t} else if ((isset($_POST['key_caesar'])) && (isset($_POST['plantext_caesar'])) && isset($_POST['decrypt_caesar'])){\r\n\t\t\t$key=$_POST['key_caesar'];\r\n\t\t\t$plantext=$_POST['plantext_caesar'];\r\n\t\t\t$i=0;\r\n\t\t\t$split_chr=str_split($plantext);\r\n\t\t\twhile ($key>52){\r\n\t\t\t\t$key=$key-52;\r\n\t\t\t}\r\n\t\t\tforeach($split_chr as $chr){\r\n\t\t\t\tif (char_to_dec($chr)!=null){\r\n\t\t\t\t\t$split_nmbr[$i]=char_to_dec($chr);\r\n\t\t\t\t} else {\r\n\t\t\t\t\t$split_nmbr[$i]=$chr;\r\n\t\t\t\t}\r\n\t\t\t\t$i++;\r\n\t\t\t}\r\n\t\t\techo '<textarea rows="4" id="result" cols="33" onclick="SelectAll(\\'result\\')" >';\r\n\t\t\tforeach($split_nmbr as $nmbr){\r\n\t\t\t\tif (($nmbr-$key)<1){\r\n\t\t\t\t\tif (dec_to_char($nmbr)!=null){\r\n\t\t\t\t\t\techo dec_to_char(($nmbr-$key)+52);\r\n\t\t\t\t\t} else {\r\n\t\t\t\t\t\techo $nmbr;\r\n\t\t\t\t\t}\r\n\t\t\t\t} else {\r\n\t\t\t\t\tif (dec_to_char($nmbr)!=null){\r\n\t\t\t\t\t\techo dec_to_char($nmbr-$key);\r\n\t\t\t\t\t} else {\r\n\t\t\t\t\t\techo $nmbr;\r\n\t\t\t\t\t}\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\techo '<\/textarea><br\/>';\r\n\t\t\t\r\n\t\/\/----------------------------------------------------------------\/\/\r\n\t\/\/ vigenere\t\t\t\t\t\t\t\t\t\t\t\t\t\t \/\/\r\n\t\/\/----------------------------------------------------------------\/\/\r\n\t\t} else if ((isset($_POST['key_vigenere'])) && (isset($_POST['plantext_vigenere'])) && (isset($_POST['encrypt_vigenere']))){\r\n\t\t\t$key=$_POST['key_vigenere'];\r\n\t\t\t$plantext=$_POST['plantext_vigenere'];\r\n\t\t\t$len_key=strlen($key);\r\n\t\t\t$len_plantext=strlen($plantext);\r\n\t\t\t$split_key=str_split($key);\r\n\t\t\t$split_plantext=str_split($plantext);\r\n\t\t\t\r\n\t\t\techo '<textarea rows="4" id="result" cols="33" onclick="SelectAll(\\'result\\')" >';\r\n\t\t\t$i=0;\r\n\t\t\tfor($j=0;$j<$len_plantext;$j++){\r\n\t\t\t\tif ($i==$len_key){\r\n\t\t\t\t\t$i=0;\r\n\t\t\t\t}\r\n\t\t\t\t$split_key2[$j]=$split_key[$i];\r\n\t\t\t\t$i++;\r\n\t\t\t}\r\n\t\t\tfor($k=0;$k<$len_plantext;$k++){\r\n\t\t\t\t$a=char_to_dec($split_key2[$k]);\r\n\t\t\t\t$b=char_to_dec($split_plantext[$k]);\r\n\t\t\t\tif (($a && $b)!=null){\r\n\t\t\t\t\techo (tabel_vigenere_encrypt($a, $b));\r\n\t\t\t\t} else {\r\n\t\t\t\t\techo $split_plantext[$k];\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\techo '<\/textarea><br\/>';\r\n\t\t} else if ((isset($_POST['key_vigenere'])) && (isset($_POST['plantext_vigenere'])) && (isset($_POST['decrypt_vigenere']))){\r\n\t\t\t$key=$_POST['key_vigenere'];\r\n\t\t\t$plantext=$_POST['plantext_vigenere'];\r\n\t\t\t$len_key=strlen($key);\r\n\t\t\t$len_plantext=strlen($plantext);\r\n\t\t\t$split_key=str_split($key);\r\n\t\t\t$split_plantext=str_split($plantext);\r\n\t\t\t\r\n\t\t\techo '<textarea rows="4" id="result" cols="33" onclick="SelectAll(\\'result\\')" >';\r\n\t\t\t$i=0;\r\n\t\t\tfor($j=0;$j<$len_plantext;$j++){\r\n\t\t\t\tif ($i==$len_key){\r\n\t\t\t\t\t$i=0;\r\n\t\t\t\t}\r\n\t\t\t\t$split_key2[$j]=$split_key[$i];\r\n\t\t\t\t$i++;\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\tfor($k=0;$k<$len_plantext;$k++){\r\n\t\t\t\t$a=char_to_dec($split_key2[$k]);\r\n\t\t\t\t$b=char_to_dec($split_plantext[$k]);\r\n\t\t\t\tif (($a && $b)!=null){\r\n\t\t\t\t\techo (tabel_vigenere_decrypt($b, $a));\r\n\t\t\t\t} else {\r\n\t\t\t\t\techo $split_plantext[$k];\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t\t\r\n\t\t\techo '<\/textarea><br\/>';\r\n\r\n\t\t} else {\r\n\t\t\techo "result here...";\r\n\t\t}\r\n\t?>\r\n\t<\/fieldset>\r\n\t<\/td><\/tr>\r\n\t<tr><td valign="top">\r\n\t<fieldset>\r\n\t<legend><b>Vigenere<\/b><\/legend>\r\n\t<form action="" method="post">\r\n\t<input type="text" name="key_vigenere" id="key_vigenere" value="the key..." onclick="SelectAll('key_vigenere')" \/>\r\n\t<input type="submit" value="?" onclick="InfoVigenere()" \/><br\/>\r\n\t<textarea rows="4" name="plantext_vigenere" id="plantext_vigenere" cols="33" onclick="SelectAll('plantext_vigenere')" >plan text...<\/textarea><br\/>\r\n\t<input type="submit" name="encrypt_vigenere" value="Encrypt" \/><input type="submit" name="decrypt_vigenere" value="Decrypt" \/><input type="reset" value="Reset" \/>\r\n\t<\/form>\r\n\t<\/fieldset>\r\n\t<\/td><\/tr>\r\n\t<!-- masih dalam pengerjaan :p\r\n\t<tr><td valign="top">\r\n\t<fieldset>\r\n\t<legend><b>Playfair<\/b><\/legend>\r\n\t<form action="" method="post">\r\n\t<input type="text" name="key_playfair" id="key_playfair" value="the key..." onclick="SelectAll('key_playfair')" \/><br\/>\r\n\t<textarea rows="4" name="plantext_playfair" id="plantext_playfair" cols="33" onclick="SelectAll('plantext_playfair')" >plan text...<\/textarea><br\/>\r\n\t<input type="submit" name="encrypt_playfair" value="Encrypt" \/><input type="submit" name="Decrypt_playfair" value="Decrypt" \/><input type="reset" value="Reset" \/>\r\n\t<\/form>\r\n\t<\/fieldset>\r\n\t<\/td><\/tr>\r\n\t-->\r\n\t<\/table>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\nkemudian untuk hasil jadinya bisa di lihat di http:\/\/zaf.web.id\/labs\/cipher<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Kemarin kebetulan belajar keamanan informasi tentang enkripsi, dan di ajarkan beberapa enkripsi yaitu caesar cipher…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[57],"tags":[89,90,100,82,111],"class_list":["post-434","post","type-post","status-publish","format-standard","hentry","category-programming","tag-caesar","tag-cipher","tag-keamanan-informasi","tag-php","tag-vigenere"],"yoast_head":"\n
Implementasi cipher dengan PHP - Ahmad Zafrullah<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Implementasi cipher dengan PHP - Ahmad Zafrullah\" \/>\n<meta property=\"og:description\" content=\"Kemarin kebetulan belajar keamanan informasi tentang enkripsi, dan di ajarkan beberapa enkripsi yaitu caesar cipher…\" \/>\n<meta property=\"og:url\" content=\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/\" \/>\n<meta property=\"og:site_name\" content=\"Ahmad Zafrullah\" \/>\n<meta property=\"article:publisher\" content=\"http:\/\/www.facebook.com\/23Pstars\" \/>\n<meta property=\"article:author\" content=\"http:\/\/www.facebook.com\/23Pstars\" \/>\n<meta property=\"article:published_time\" content=\"2011-04-04T05:11:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-11-24T10:55:10+00:00\" \/>\n<meta name=\"author\" content=\"Zaf\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@23Pstars\" \/>\n<meta name=\"twitter:site\" content=\"@23Pstars\" \/>\n<meta name=\"twitter:label1\" content=\"Ditulis oleh\" \/>\n\t<meta name=\"twitter:data1\" content=\"Zaf\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimasi waktu membaca\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 menit\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/\"},\"author\":{\"name\":\"Zaf\",\"@id\":\"https:\/\/zaf.web.id\/blog\/#\/schema\/person\/ba4e955d59a1e6a8284857e74b14e5ed\"},\"headline\":\"Implementasi cipher dengan PHP\",\"datePublished\":\"2011-04-04T05:11:09+00:00\",\"dateModified\":\"2014-11-24T10:55:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/\"},\"wordCount\":1778,\"commentCount\":23,\"publisher\":{\"@id\":\"https:\/\/zaf.web.id\/blog\/#\/schema\/person\/ba4e955d59a1e6a8284857e74b14e5ed\"},\"keywords\":[\"caesar\",\"cipher\",\"keamanan informasi\",\"php\",\"vigenere\"],\"articleSection\":[\"Programming\"],\"inLanguage\":\"id\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/\",\"url\":\"https:\/\/zaf.web.id\/blog\/implementasi-cipher-dengan-php\/\",\"name\":\"Implementasi cipher dengan PHP - 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