我项目的加密/解密算法 [英] Encryption/Decryption algorithm for my project
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问题描述
嗨！
我的项目需要加密/解密算法.它应该加密给定的值，该值可以同时包含字母和数字字符，并且还应该能够解密.
我应该使用哪种算法?
感谢您的帮助！
解决方案
您可能应该阅读一些入门资料.起点可能是《 NetAction使用加密软件指南》 [ 使用系统； 使用 System.Data； 使用 System.Configuration； 使用 System.Web； 使用 System.Web.Security； 使用 System.Web.UI； 使用使用System.Web.UI.WebControls; 使用 System.Web.UI.WebControls.WebParts； 使用 System.Web.UI.HtmlControls; 使用 System.IO； 使用 System.Text； 使用使用System.Security.Cryptography； 命名空间 MSIS.SPH.Common { 公共 类 EncryptionDecryption { 私有 静态 字符串 Encrypt(字符串 plainText，字符串 passPhrase，字符串 saltValue，字符串 hashAlgorithm， int passwordIterations，字符串 initVector， int keySize) { // 将字符串转换为字节数组. // 让我们假设字符串仅包含ASCII码. // 如果字符串包含Unicode字符，请使用Unicode，UTF7或UTF8 // 编码. 字节 [] initVectorBytes = 空; initVectorBytes = Encoding.ASCII.GetBytes(initVector); 字节 [] saltValueBytes = 空; saltValueBytes = Encoding.ASCII.GetBytes(saltValue); // 将我们的纯文本转换为字节数组. // 让我们假设纯文本包含UTF8编码的字符. 字节 [] plainTextBytes = 空; plainTextBytes = Encoding.UTF8.GetBytes(plainText); PasswordDeriveBytes password = 默认(PasswordDeriveBytes); 密码= 新 PasswordDeriveBytes(passPhrase，saltValueBytes，hashAlgorithm，passwordIterations); // 使用密码生成用于加密的伪随机字节 // 键.以字节(而不是位)为单位指定密钥的大小. 字节 [] keyBytes = 空; keyBytes = password.GetBytes(keySize/ 8 ); // 创建未初始化的Rijndael加密对象. RijndaelManaged symmetricKey = 默认(RijndaelManaged)； symmetricKey = 新 RijndaelManaged(); // 将加密模式设置为密码块链接是合理的 // (CBC).对其他对称键参数使用默认选项. symmetricKey.Mode = CipherMode.CBC; // 根据现有密钥字节和初始化生成加密器 // 向量.密钥大小将根据密钥数进行定义 // 字节. ICryptoTransform encryptionor = 默认(ICryptoTransform); cryptoor = symmetricKey.CreateEncryptor(keyBytes，initVectorBytes); // 定义将用于保存加密数据的内存流. MemoryStream memoryStream = 默认(MemoryStream); memoryStream = 新 MemoryStream(); // 定义加密流(始终使用写入模式进行加密). CryptoStream cryptoStream = 默认(CryptoStream); cryptoStream = 新 CryptoStream(内存流，加密器，CryptoStreamMode.Write)； // 开始加密. cryptoStream.Write(plainTextBytes， 0 ，plainTextBytes.Length); // 完成加密. cryptoStream.FlushFinalBlock(); // 将我们的加密数据从内存流转换为字节数组. 字节 [] cipherTextBytes = 空; cipherTextBytes = memoryStream.ToArray(); // 关闭两个流. memoryStream.Close(); cryptoStream.Close(); // 将加密的数据转换为base64编码的字符串. 字符串 cipherText = 空； cipherText = Convert.ToBase64String(cipherTextBytes); // 返回加密的字符串. 返回 cipherText； } 私有 静态 字符串 Decrypt(字符串 cipherText，字符串 passPhrase，字符串 saltValue，字符串 hashAlgorithm， int passwordIterations，字符串 initVector， int keySize) { // 将定义加密密钥特征的字符串转换为字节 // 数组.让我们假设字符串仅包含ASCII码. // 如果字符串包含Unicode字符，请使用Unicode，UTF7或UTF8 // 编码. 字节 [] initVectorBytes = 空; initVectorBytes = Encoding.ASCII.GetBytes(initVector); 字节 [] saltValueBytes = 空; saltValueBytes = Encoding.ASCII.GetBytes(saltValue); // 将我们的密文转换为字节数组. 字节 [] cipherTextBytes = 空; cipherTextBytes = Convert.FromBase64String(cipherText); // 首先，我们必须创建一个密码，该密码将来自 // 派生.该密码将从指定的生成 // 密码和盐值.密码将使用创建 // 指定的哈希算法.密码创建可以在中完成 // 多次迭代. PasswordDeriveBytes password = 默认(PasswordDeriveBytes); 密码= 新 PasswordDeriveBytes(passPhrase，saltValueBytes，hashAlgorithm，passwordIterations); // 使用密码生成用于加密的伪随机字节 // 键.以字节(而不是位)为单位指定密钥的大小. 字节 [] keyBytes = 空; keyBytes = password.GetBytes(keySize/ 8 ); // 创建未初始化的Rijndael加密对象. RijndaelManaged symmetricKey = 默认(RijndaelManaged)； symmetricKey = 新 RijndaelManaged(); // 将加密模式设置为密码块链接是合理的 // (CBC).对其他对称键参数使用默认选项. symmetricKey.Mode = CipherMode.CBC; // 根据现有密钥字节和初始化生成解密器 // 向量.密钥大小将根据密钥数进行定义 // 字节. ICryptoTransform解密器= 默认(ICryptoTransform); 解密器= symmetricKey.CreateDecryptor(keyBytes，initVectorBytes); // 定义将用于保存加密数据的内存流. MemoryStream memoryStream = 默认(MemoryStream); memoryStream = 新 MemoryStream(cipherTextBytes); // 定义将用于保存加密数据的内存流. CryptoStream cryptoStream = 默认(CryptoStream); cryptoStream = 新 CryptoStream(memoryStream，解密器，CryptoStreamMode.Read); // 由于目前我们还不知道解密数据的大小 // 将分配足够长的缓冲区以容纳密文； // 纯文本永远不会比密文长. 字节 [] plainTextBytes = 新 字节 [ cipherTextBytes.Length]; int decryptedByteCount = 0 ; unlockedByteCount = cryptoStream.Read(plainTextBytes， 0 ，plainTextBytes.Length); // 关闭两个流. memoryStream.Close(); cryptoStream.Close(); // 将解密的数据转换为字符串. // 让我们假设原始明文字符串是UTF8编码的. 字符串 plainText = 空; plainText = Encoding.UTF8.GetString(plainTextBytes， 0 ，decryptedByteCount); // 返回已解密的字符串. 返回 plainText; } 公共 静态 字符串 EncryptValue(字符串 strString) { 如果(字符串.IsNullOrEmpty(strString.Trim()))返回 " ; 字符串 strplainText = 空； 字符串 strcipherText = 空; 字符串 strpassPhrase = 空； 字符串 strsaltValue = 空； 字符串 strhashAlgorithm = 空; int intpasswordIterations = 0 ; 字符串 strinitVector = 空； int intkeySize = 0 ; strplainText = strString; // 你好，世界！-abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890-=！@#
％^& *()_ + [];，./<>?:'{} | \'原始明文 strpassPhrase = " ; // 可以是任何字符串 strsaltValue = " ; // 可以是任何字符串 strhashAlgorithm = " ; // 可以是"MD5" intpasswordIterations = 2 ; // 可以是任何数字 strinitVector = " ; // 必须为16个字节 intkeySize = 256 ; // 可以是192或128 // Response.Write(String.Format("Plaintext:{0}"，plainText)) // Response.Write(< br>") strcipherText =加密(strplainText，strpassPhrase，strsaltValue，strhashAlgorithm，intpasswordIterations，strinitVector，intkeySize); // Response.Write(String.Format("Encrypted:{0}"，cipherText)) // Response.Write(< br>") 返回 strcipherText; } 公共 静态 字符串 DecryptValue(字符串 strString) { 如果(字符串.IsNullOrEmpty(strString.Trim()))返回 " ; 字符串 strplainText = 空； 字符串 strcipherText = 空; 字符串 strpassPhrase = 空； 字符串 strsaltValue = 空； 字符串 strhashAlgorithm = 空; int intpasswordIterations = 0 ; 字符串 strinitVector = 空； int intkeySize = 0 ; strplainText = strString; // 你好，世界！-abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890-=！@#
Hi!
I need an encryption/decryption algorithm for my project. It should encrypt a given value which may contain both alphabetic as well as numberic characters and should also be able to decrypt.
Which algorithm should I use?
Thanks for your help!
解决方案
You should probably read some introductory material. A starting point might be NetAction''s Guide to Using Encryption Software[^].
Hi Keyrun
plz copy and paste algo written below and call it. will work fine
any problem contact on
REMOVED@gmail.com
regards,
satan singh
using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.IO; using System.Text; using System.Security.Cryptography; namespace MSIS.SPH.Common { public class EncryptionDecryption { private static string Encrypt(string plainText, string passPhrase, string saltValue, string hashAlgorithm, int passwordIterations, string initVector, int keySize) { // Convert strings into byte arrays. // Let us assume that strings only contain ASCII codes. // If strings include Unicode characters, use Unicode, UTF7, or UTF8 // encoding. byte[] initVectorBytes = null; initVectorBytes = Encoding.ASCII.GetBytes(initVector); byte[] saltValueBytes = null; saltValueBytes = Encoding.ASCII.GetBytes(saltValue); // Convert our plaintext into a byte array. // Let us assume that plaintext contains UTF8-encoded characters. byte[] plainTextBytes = null; plainTextBytes = Encoding.UTF8.GetBytes(plainText); PasswordDeriveBytes password = default(PasswordDeriveBytes); password = new PasswordDeriveBytes(passPhrase, saltValueBytes, hashAlgorithm, passwordIterations); // Use the password to generate pseudo-random bytes for the encryption // key. Specify the size of the key in bytes (instead of bits). byte[] keyBytes = null; keyBytes = password.GetBytes(keySize / 8); // Create uninitialized Rijndael encryption object. RijndaelManaged symmetricKey = default(RijndaelManaged); symmetricKey = new RijndaelManaged(); // It is reasonable to set encryption mode to Cipher Block Chaining // (CBC). Use default options for other symmetric key parameters. symmetricKey.Mode = CipherMode.CBC; // Generate encryptor from the existing key bytes and initialization // vector. Key size will be defined based on the number of the key // bytes. ICryptoTransform encryptor = default(ICryptoTransform); encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes); // Define memory stream which will be used to hold encrypted data. MemoryStream memoryStream = default(MemoryStream); memoryStream = new MemoryStream(); // Define cryptographic stream (always use Write mode for encryption). CryptoStream cryptoStream = default(CryptoStream); cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write); // Start encrypting. cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length); // Finish encrypting. cryptoStream.FlushFinalBlock(); // Convert our encrypted data from a memory stream into a byte array. byte[] cipherTextBytes = null; cipherTextBytes = memoryStream.ToArray(); // Close both streams. memoryStream.Close(); cryptoStream.Close(); // Convert encrypted data into a base64-encoded string. string cipherText = null; cipherText = Convert.ToBase64String(cipherTextBytes); // Return encrypted string. return cipherText; } private static string Decrypt(string cipherText, string passPhrase, string saltValue, string hashAlgorithm, int passwordIterations, string initVector, int keySize) { // Convert strings defining encryption key characteristics into byte // arrays. Let us assume that strings only contain ASCII codes. // If strings include Unicode characters, use Unicode, UTF7, or UTF8 // encoding. byte[] initVectorBytes = null; initVectorBytes = Encoding.ASCII.GetBytes(initVector); byte[] saltValueBytes = null; saltValueBytes = Encoding.ASCII.GetBytes(saltValue); // Convert our ciphertext into a byte array. byte[] cipherTextBytes = null; cipherTextBytes = Convert.FromBase64String(cipherText); // First, we must create a password, from which the key will be // derived. This password will be generated from the specified // passphrase and salt value. The password will be created using // the specified hash algorithm. Password creation can be done in // several iterations. PasswordDeriveBytes password = default(PasswordDeriveBytes); password = new PasswordDeriveBytes(passPhrase, saltValueBytes, hashAlgorithm, passwordIterations); // Use the password to generate pseudo-random bytes for the encryption // key. Specify the size of the key in bytes (instead of bits). byte[] keyBytes = null; keyBytes = password.GetBytes(keySize / 8); // Create uninitialized Rijndael encryption object. RijndaelManaged symmetricKey = default(RijndaelManaged); symmetricKey = new RijndaelManaged(); // It is reasonable to set encryption mode to Cipher Block Chaining // (CBC). Use default options for other symmetric key parameters. symmetricKey.Mode = CipherMode.CBC; // Generate decryptor from the existing key bytes and initialization // vector. Key size will be defined based on the number of the key // bytes. ICryptoTransform decryptor = default(ICryptoTransform); decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes); // Define memory stream which will be used to hold encrypted data. MemoryStream memoryStream = default(MemoryStream); memoryStream = new MemoryStream(cipherTextBytes); // Define memory stream which will be used to hold encrypted data. CryptoStream cryptoStream = default(CryptoStream); cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read); // Since at this point we don't know what the size of decrypted data // will be, allocate the buffer long enough to hold ciphertext; // plaintext is never longer than ciphertext. byte[] plainTextBytes = new byte[cipherTextBytes.Length]; int decryptedByteCount = 0; decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length); // Close both streams. memoryStream.Close(); cryptoStream.Close(); // Convert decrypted data into a string. // Let us assume that the original plaintext string was UTF8-encoded. string plainText = null; plainText = Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount); // Return decrypted string. return plainText; } public static string EncryptValue(string strString) { if (string.IsNullOrEmpty(strString.Trim())) return ""; string strplainText = null; string strcipherText = null; string strpassPhrase = null; string strsaltValue = null; string strhashAlgorithm = null; int intpasswordIterations = 0; string strinitVector = null; int intkeySize = 0; strplainText = strString; //"Hello, World! - abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890-=!@#
%^&*()_+[];,./<>?:'{}|\" ' original plaintext strpassPhrase = "Pas5pr@se"; // can be any string strsaltValue = "s@1tValue"; // can be any string strhashAlgorithm = "SHA1"; // can be "MD5" intpasswordIterations = 2; // can be any number strinitVector = "@1B2c3D4e5F6g7H8"; // must be 16 bytes intkeySize = 256; // can be 192 or 128 //Response.Write(String.Format("Plaintext : {0}", plainText)) //Response.Write("<br>") strcipherText = Encrypt(strplainText, strpassPhrase, strsaltValue, strhashAlgorithm, intpasswordIterations, strinitVector, intkeySize); //Response.Write(String.Format("Encrypted : {0}", cipherText)) //Response.Write("<br>") return strcipherText; } public static string DecryptValue(string strString) { if (string.IsNullOrEmpty(strString.Trim())) return ""; string strplainText = null; string strcipherText = null; string strpassPhrase = null; string strsaltValue = null; string strhashAlgorithm = null; int intpasswordIterations = 0; string strinitVector = null; int intkeySize = 0; strplainText = strString; //"Hello, World! - abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890-=!@#
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