encrypto

(){String stemp = _ strkey;_ Objcryptoservice. generatekey ();Byte [] byttemp = _ objcryptoservice. Key;Int keylength = byttemp. length;If (stemp. length> keylength)Stemp = stemp. substring (0, keylength );Else if (stemp. Length STemp = sTemp. PadRight (KeyLength ,'');Return ASCIIEncoding. ASCII. GetBytes (sTemp );}/// /// Initialize IV/// /// Private byte [] GetLegalIV (){_ Objcryptoservice. generateiv ();Byte [] byttemp = _ objcryptoservice. IV;Int ivlength = byttemp. length;If (_ striv. leng

=NewMemoryStream (); MobjCryptoService. Key = GetLegalKey (); MobjCryptoService. IV = GetLegalIV (); ICryptoTransform encrypto = mobjCryptoService. CreateEncryptor (); CryptoStream cs =NewCryptoStream (MS, encrypto, CryptoStreamMode. Write ); Cs. Write (bytIn, 0, bytIn. Length ); Cs. FlushFinalBlock (); Ms. Close (); Byte[] BytOut = ms. ToArray (); ReturnConvert. ToBase64String (bytOut );

= Key.padright (MORESIZE/8, "); } Else Stemp = Key; Convert the secret key to byte array Return ASCIIEncoding.ASCII.GetBytes (stemp); Public byte[] Encrypting (byte[] bytin, string Key) {//Create a MemoryStream so, the process can be done without I/O files System.IO.MemoryStream ms = new System.IO.MemoryStream (); byte[] Bytkey = Getlegalkey (Key); Set the private key Mobjcryptoservice.key = Bytkey; MOBJCRYPTOSERVICE.IV = Bytkey; Create a encryptor from the Provider Service instance ICryptoTran

($ jhwk7 ! Hg4ui % $ hjk " ; 27 Mobjcryptoservice. generateiv (); 28 Byte [] Byttemp = mobjcryptoservice. IV; 29 Int Ivlength = byttemp. length; 30 If (Stemp. length> ivlength) 31 Stemp = stemp. substring ( 0 , Ivlength ); 32 Else If (Stemp. Length 33 Stemp = stemp. padright (ivlength, ' ' ); 34 Return Asciiencoding. ASCII. getbytes (stemp ); 35 } 36 37 /// 38 /// Encryption Method 39 /// 40 /// String to be encrypted 41 /// Encrypted strin

(% hj7x89H $ yuBI0456FtmaT5 fvHUFCy76 * h % (HilJ $ lhj! Y6 (* jkP87jH7 "; } /// /// Obtain the key /// /// Private byte [] GetLegalKey () { String sTemp = Key; MobjCryptoService. GenerateKey (); Byte [] bytTemp = mobjCryptoService. Key; Int KeyLength = bytTemp. Length; If (sTemp. Length> KeyLength) STemp = sTemp. Substring (0, KeyLength ); Else if (sTemp. Length STemp = sTemp. PadRight (KeyLength ,''); Return ASCIIEncoding. ASCII. GetBytes (sTemp ); } /// /// Obtain the initial vector

Stemp = Stemp.padright (Keylength, "); Return ASCIIEncoding.ASCII.GetBytes (stemp); } Get the initial vector IV Private byte[] Getlegaliv () { String stemp = "E4ghj*ghg7!rnifb95guy86gfghub#er57hbh (u%g6hj ($jhWk 7!hg4ui% $HJK"; Mobjcryptoservice.generateiv (); byte[] Byttemp = MOBJCRYPTOSERVICE.IV; int ivlength = Byttemp.length; if (Stemp.length > Ivlength) stemp = stemp.substring (0, ivlength); else if (Stemp.length Stemp = Stemp.padright (Ivlength, "); Return ASCIIEncoding.ASCII.GetBytes (ste

/// MD5 the encrypted string Public Static stringMd5encrypt (stringstrsource) { //Put the string in a byte array byte[] Bytin =System.Text.Encoding.Default.GetBytes (strsource); //establish keys and offsets for encrypted objects byte[] IV = {102, -, the,156, +,4,218, +};//defining offsets byte[] key = { -,103,246, -, $, About,167,3};//Defining Keys//Instance des encryption classDESCryptoServiceProvider Mobjcryptoservice =NewDE

#region MD5 Encryption // // MD5 encryption // /// /// public static string Md5encrypt (string strsource) { //Put the string in a byte array byte[] Bytin = System.Text.Encoding.Default.GetBytes (strsource); //Establish keys and offsets for encrypted objects Byte[] IV = {102, 16, 93, 156, 78, 4, 218, 32}; //define offset byte[] key = {55, 103, 246, 79, 36, 99, 167, 3}; //define key //Instance DES encryption class DESCryptoServiceProvider mobjcryptoservice = n

) { Lesssize = moresize; Moresize + = mobjcryptoservice. legalkeysizes [0]. skipsize; } Stemp = key. padright (moresize/8 ,''); } Else Stemp = key; // convert the secret key to byte array Return asciiencoding. ASCII. getbytes (stemp ); } Public byte [] encrypting (byte [] bytin, string key) {// Create a memorystream so that the process can be done without I/O files System. Io. memorystream MS = new system. Io. memorystream (); byte [] bytkey = getlegalkey (key); // set the Private Key Mobjcrypto

check_padding(plaintext): global pad_num for i in range(1,pad_num+1): if (plaintext[-i]!=chr(pad_num)): return False return True def encrypto(plaintext): global pad_num obj = AES.new(key,mode,vi) if (len(plaintext) % 16): plaintext = add_padding(plaintext) else: pad_num=0 ciphertext = obj.encrypt(plaintext) if (check_padding(ciphertext)): return ciphertext else: return 0 def

]initwithbytes:digest length:cc_sha1_digest_length];Base64 = [GTMBase64 encodedata:base64];NSString * output = [[NSString alloc] initwithdata:base64 encoding:nsutf8stringencoding];return output;}-(NSString *) md5_base64{const char *CSTR = [self utf8string];unsigned char digest[cc_md5_digest_length];CC_MD5 (CStr, strlen (CStr), Digest);NSData * base64 = [[NSData alloc]initwithbytes:digest length:cc_md5_digest_length];Base64 = [GTMBase64 encodedata:base64];NSString * output = [[NSString alloc] ini

:=dbms_crypto.encrypt (src=>V_str_raw, OneTyp=>Dbms_crypto. DES_CBC_PKCS5, AKey=>V_key_raw); - returnResult_crypto; -end; the/Function created.3. Create a decryption functionSql>Create or Replace function Fun_disable_crypto (Encrypto raw,2V_key VARCHAR2default 'ABCDEFGH') 3 returnvarchar24 is 5V_key_raw Raw ( -): =utl_i18n.string_to_raw (V_key,'Al32utf8'); 6Result_crypto Raw ( -); 7begin8Result_crypto:=dbms_crypto.decrypt (src =

(keyPtr, sizeof (keyPtr )); [Key getCString: keyPtr maxLength: sizeof (keyPtr) encoding: NSUTF8StringEncoding]; NSUInteger dataLength = [self length]; Size_t bufferSize = dataLength + kCCBlockSizeAES128; Void * buffer = malloc (bufferSize ); Size_t numBytesDecrypted = 0; CCCryptorStatus cryptStatus = CCCrypt (kCCDecrypt, kCCAlgorithmAES128, KCCOptionPKCS7Padding | kCCOptionECBMode, KeyPtr, kCCBlockSizeAES128, NULL, [Self bytes], dataLength, Buffer, bufferSize, NumBytesDecrypted ); If (cryptSta

package, which mainly provides the new and sum functions. At first glance, the use is not the same as in the past. But after reading the example found that the purpose is the same, is to create a MD5 object, and then update the plaintext, and then encrypt the output, and finally clean the battlefield. Let's look at an example: Package MainImport ( "CRYPTO/MD5" "FMT" "Encoding/hex")func Main(){ Md5ctx := MD5.New() Md5ctx.Write([]byte("Test MD5

need to record what permissions he has and what scope of operations each permission has? This process is generally performed after the user logs on to the database and connects to the database. This is a complicated logical operation process. The encryption method is a good idea, such a malicious user, it doesn't matter even if you use Jad to restore all other class files, unless he can guess what you did in login. 7. how to encrypt your Java file 7.2. file encryption encrypts our files. We use

to come to the line, This file is called Encryption.exe. You can encrypt your files using the following command C:> Encryption–encrypto Myclass.classSo you can make your files into Jad and other tools can not decompile the file. 8. Product information obtained from LicencecenterWhether you add a course or create a new user, you may have a requirement, how do I know what kind of information my product authorizes to this user, and whether he is allowe