encrypt decrypt

Des is a standard data encryption algorithm, the detailed introduction of this algorithm can refer to Wiki and Baidu Encyclopedia: Wiki Encyclopedia Baidu Encyclopedia PHP has an extension to support DES encryption algorithm, is:extension=php_mcrypt.dll Opening this extension in a configuration file cannot be used in a Windows environment You need to copy the Libmcrypt.dll under the PHP folder to the System32 directory of the system, which is phpinfo to see mcrypt that the module can be test

Kangsheng's Authcode function can be said to make a significant contribution to China's PHP industry. Including Kangsheng's own products, and most Chinese companies using PHP use this function for encryption, Authcode is encrypted and decrypted using XOR. 　　The principle is as follows, if: Encryption Clear text: 1010 1001 Secret key: 1110 0011 Redaction: 0100 1010 To get the ciphertext 0100 1010, the need to decrypt and the key is different or u

You can write your own encryption and decryption program. Reversible.It is usually encrypted with MD5. The data written by the database is encrypted.However, this method of encryption is irreversible. Write an encryption, decryption program, very simple:) var pwd = "Gray bean";function Encrypt (str){var newstr = "";str = Escape (str);var len = str.length;for (Var i=0;i{Tmpstr = Str.substr (i,1)Newstr + + string.fromcharcode (tmpstr.charcodeat (0) +i);

In this tutorial, we will first talk about available characters in PHP variables because we want to decrypt the program encrypted by Alibaba Cloud Security. Understanding the available characters in PHP variables is the primary condition for decryption, go directly to the topic and talk about the naming rules of php variables. Baidu will take the following measures: (1) PHP variable names are case sensitive; (2) the variable name must start with the d

PHP code :--------------------------------------------------------------------------------Function make_seed (){List ($ usec, $ sec) = explode ('', microtime ());Return (float) $ sec + (float) $ usec * 100000 );}Srand (make_seed ());/* Enable the encryption algorithm /*/$ Td = mcrypt_module_open ('twofish ',', 'ecb ',');/* Create an IV and check the key length */$ Iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($ td), MCRYPT_RAND );$ Ks = mcrypt_enc_get_key_size ($ td );/* Generate the key */$ Ke

In this tutorial, we will first talk about available characters in PHP variables because we want to decrypt the program encrypted by Alibaba Cloud Security. Understanding the available characters in PHP variables is the primary condition for decryption, go directly to the topic and talk about the naming rules of php variables. Baidu will take the following measures: (1) PHP variable names are case sensitive; (2) the variable name must start with the d

Encryption | Decryption can be used to add/Decrypt database users, passwords, etc. Using System; Using System.IO; Using System.Text; Using System.Security.Cryptography; Namespace Common { Summary description of the Securityservice. public class Securityservice { Static protected byte[] Bytekey = {125, 14, 45, 67, 112, 79, 77, 99, 37, 104, 13, 9, 118, 51, 87, 108}; Static protected byte[] Byteiv = {86, 19, 79, 15, 72, 58, 117, 45}; static public stri

/cwhbjzbvtytlzpevxyl8q8cqhiakhkcopr2475f61fxj1cobzyoSuazeswhzpjlndwkm2i9d1ix5vdtvaj3mf/cnlvtwbchlcxjsvabdi1uruccqamnInq6/mcopw6ac3x0uc3jeigwzktoxmsi/jawmdw/5zfioo06bui+iwrd4vrsogh9G2ipdgwic0uuf+ddm6kcqf2/ubl6mzkdc4rveff3vjh7escfmfssq/evez637n062pzsvvb4xq6gt9vwogvnsn5r/k6abt+rmeww57jo7pg=-----END RSA PRIVATE KEY----- ]]--Public Key CryptographyLocal Resty_rsa=Require"Resty.rsa"Local pub, err= Resty_rsa:New ({Public_key= Rsa_public_key})IfNot pubThen Ngx.Say"New RSA ERR:", err)ReturnEndLocal encry

This post is marked as obsolete Please read the latest yxy des 2.1 and itsCode, Click the following link to start reading: [Original] Des encryption and decryption Tool 2.1 and its code-support string and file encryption, support for three des Self-built desAlgorithmEncrypted or decrypted string of any lengthProgram1.01. This program can encrypt any string of 1-characters2. If the key length is too short or is null, the program uses the

Encryption | decryption | Chinese Imports System Imports System.IO Imports System.Security Imports System.Security.Cryptography Imports System.Text Module Encrypt Private Const sSecretKey as String = "Password" Public Sub Main () EncryptFile ("C:\temp\test.txt", _ "C:\temp\Encrypted.txt", _ sSecretKey) DecryptFile ("C:\temp\Encrypted.txt", _ "C:\temp\Decrypted.txt", _ sSecretKey) End Sub Sub EncryptFile (ByVal sinputfilename as String, _ ByVal sOut

In the database implementation of encryption and decryption of the article, Insus.net earlier also wrote, can be found in this blog can be searched.Use Encryptbypassphrase and decryptbypassphrase today to make it simple.Create a table in the database to demonstrateCREATE TABLE [dbo].[Users]( [U_NBR] NVARCHAR( -) not NULL PRIMARY KEY, [PWD] VARBINARY(MAX))When a user registers or adds a record, you can use the following SQL statement:When you need to verify user login information, we need t

I have a space, because I used the database for the session, so I can see the database table session data is a piece of garbled, not directly clear. How is it configured? Can you reverse the decryption? Because I use the database as a session, because I need to be on other computers to replicate this session by obtaining a SID to implement multiple computer logins. . Reply to discussion (solution) Save the time, add a field, save session_id; If you want to copy the session to an

Here is an example of Rijndael encryption using PHP: {code...} I have found this Code. The answer in this code is indeed feasible, but how can I customize iv? (That is, utf8_encode ( #039; fOaiIOkD8 * 9Xeu_s4_bb87Ox_UG + D9GA #039;) In addition, block_size, key_size, and iv_size are required... the following is an example of Rijndael encryption using PHP: function encrypt($data) { return base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256 ,'oqufXQ(?bc

In our development, we often use the spring framework to read property values for property files, and then use placeholders to reference property values of property files to simplify configuration and make configurations more flexible and versatile. such as the following property profile: Db.properties #数据库配置 Db.driver=org.postgresql.driver Db.url=jdbc\:p Ostgresql\://10.166.176.127\:5432/test Db.username=ivsadmin db.password=123456 Db.name=ivs Applicationcontext.xml file For some s

key */$ Key = substr (md5 ('very secret key'), 0, $ ks );/* Initialize the encryption program */Mcrypt_generic_init ($ td, $ key, $ iv );/* Encrypted, $ encrypted stores encrypted data */Print $ encrypted = mcrypt_generic ($ td, 'This is very important data ');/* Check the encryption handle */Mcrypt_generic_deinit ($ td );/* Initialize the encryption module for decryption */Mcrypt_generic_init ($ td, $ key, $ iv );/* Decrypt */$ Decrypted = mdecrypt_

PHP code: using functionmake_seed () {list ($ usec, $ sec) explode (, microtime (); return (float) $ sec + (float) $ usec * 100000);} srand (make_seed (); * enable encryption algorithm * $ t PHP code :-------------------------------------------------------------------------------- Function make_seed (){ List ($ usec, $ sec) = explode ('', microtime ()); Return (float) $ sec + (float) $ usec * 100000 ); } Srand (make_seed ()); /* Enable the encryption algorithm /*/ $ Td = mcrypt_module_open ('tw

In this tutorial, we will first talk about available characters in PHP variables because we want to decrypt the program encrypted by Alibaba Cloud Security. Understanding the available characters in PHP variables is the primary condition for decryption, go directly to the topic and talk about the naming rules of php variables. Baidu will take the following measures: (1) PHP variable names are case sensitive; (2) the variable name must start with the d

Recently, in my project, I needed to encrypt some SQL statements on the android client. I used DES encryption, and the result encryption appeared. javax.crypto.BadPaddingException: Given final block not properly padded Such an error, or the garbled problem, is very tangled! When I checked some information, it may be a key issue or a code issue. I found that the key is correct, that is, when the key is created, the obtained byte [] array has some proce

Tags: style io os using strong file Data SP CTIThe "connectionStrings" path is the project directory where Web. config resides.1, encryption Encryptwebconfig.bat@echo offC:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -pef "connectionStrings" "D:\Web"PAUSE2, decryption Decryptwebconfig.bat@echo offC:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -pdf "connectionStrings" "D:\Web"PAUSEThe black one is the difference between the two files.Note: This method is encrypte

string plaintext = "This is plain text so we'll encrypt"; string password = "[Email protected]$ $w 0rd"; Console.WriteLine (plaintext); Console.WriteLine (); Create a new instance of our encryption class passing in the password as the key desencrypt testencrypt = new Desencry PT (); String enctext = testencrypt.encryptstring (plaintext, password); Console.WriteLine ("****** Encrypted text **