How To Get Aes Decryption Key From Dmg
- Aes Decryption Online
- How To Get Aes Decryption Key From Dmg Windows 10
- How To Get Aes Decryption Key From Dmg Mac
The cipher key is a variable-length string, I MD5 hash the string to get the 128 bit key. I can successfully encrypt and decrpyt the data using the same key. But if I decrypt the data with wrong key, I got the exception below: javax.crypto.BadPaddingException: Given final block not properly padded. Encryption with AES-256 and the Initialization Vector. Ask Question Asked 8 years, 11 months ago. The same IV needs to be used for both encryption and decryption. Do they simply use the key as the seed for the generator to get the same IV per key or is there something more going on?
| usingSystem; |
| usingSystem.Security.Cryptography; |
| usingSystem.Text; |
| namespaceAesExample |
| { |
| classProgram |
| { |
| privateconststringORIGINAL='this is some data to encrypt'; |
| privateconststringSAMPLE_KEY='gCjK+DZ/GCYbKIGiAt1qCA'; |
| privateconststringSAMPLE_IV='47l5QsSe1POo31adQ/u7nQ'; |
| staticvoidMain(string[] args) |
| { |
| //Aes aes = new Aes(); //생성자에 arguments가 없으면 key와 iv 자동생성 |
| Aesaes=newAes(SAMPLE_KEY, SAMPLE_IV); |
| Console.WriteLine('ORIGINAL:'+ORIGINAL); |
| Console.WriteLine('KEY:'+aes.GetKey()); |
| Console.WriteLine('IV:'+aes.GetIV()); |
| /*string->byte->string*/ |
| Console.WriteLine('Example for: string->byte->string'); |
| byte[] encryptedBlock=aes.EncryptToByte(ORIGINAL); //original text 를 암호화된 byte 배열로 변환 |
| stringdecryptedString=aes.Decrypt(encryptedBlock); //암호화된 byte 배열을 original text로 복호화 |
| Console.WriteLine(decryptedString); |
| /*string->base64->string*/ |
| Console.WriteLine('Example for: string->base64->string'); |
| stringencryptedBase64String=aes.EncryptToBase64String(ORIGINAL); //original text를 암호화된 base64 string으로 변환 |
| decryptedString=aes.DecryptFromBase64String(encryptedBase64String); //암호호된 base64 string을 original text로 복호화 |
| Console.WriteLine(encryptedBase64String); |
| Console.WriteLine(decryptedString); |
| Console.ReadLine(); |
| } |
| } |
| classAes |
| { |
| privatestaticRijndaelManagedrijndael=newRijndaelManaged(); |
| privatestatic System.Text.UnicodeEncodingunicodeEncoding=newUnicodeEncoding(); |
| privateconstintCHUNK_SIZE=128; |
| privatevoidInitializeRijndael() |
| { |
| rijndael.Mode=CipherMode.CBC; |
| rijndael.Padding=PaddingMode.PKCS7; |
| } |
| publicAes() |
| { |
| InitializeRijndael(); |
| rijndael.KeySize=CHUNK_SIZE; |
| rijndael.BlockSize=CHUNK_SIZE; |
| rijndael.GenerateKey(); |
| rijndael.GenerateIV(); |
| } |
| publicAes(Stringbase64key, Stringbase64iv) |
| { |
| InitializeRijndael(); |
| rijndael.Key=Convert.FromBase64String(base64key); |
| rijndael.IV=Convert.FromBase64String(base64iv); |
| } |
| publicAes(byte[] key, byte[] iv) |
| { |
| InitializeRijndael(); |
| rijndael.Key=key; |
| rijndael.IV=iv; |
| } |
| publicstringDecrypt(byte[] cipher) |
| { |
| ICryptoTransformtransform=rijndael.CreateDecryptor(); |
| byte[] decryptedValue=transform.TransformFinalBlock(cipher, 0, cipher.Length); |
| returnunicodeEncoding.GetString(decryptedValue); |
| } |
| publicstringDecryptFromBase64String(stringbase64cipher) |
| { |
| returnDecrypt(Convert.FromBase64String(base64cipher)); |
| } |
| publicbyte[] EncryptToByte(stringplain) |
| { |
| ICryptoTransformencryptor=rijndael.CreateEncryptor(); |
| byte[] cipher=unicodeEncoding.GetBytes(plain); |
| byte[] encryptedValue=encryptor.TransformFinalBlock(cipher, 0, cipher.Length); |
| returnencryptedValue; |
| } |
| publicstringEncryptToBase64String(stringplain) |
| { |
| returnConvert.ToBase64String(EncryptToByte(plain)); |
| } |
| publicstringGetKey() |
| { |
| returnConvert.ToBase64String(rijndael.Key); |
| } |
| publicstringGetIV() |
| { |
| returnConvert.ToBase64String(rijndael.IV); |
| } |
| publicoverridestringToString() |
| { |
| return'KEY:'+GetKey() +Environment.NewLine+'IV:'+GetIV(); |
| } |
| } |
| } |
Aes Decryption Online
commented Nov 1, 2019
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commented Nov 2, 2019
How To Get Aes Decryption Key From Dmg Windows 10
Hey It's just an example code. You can use it whatever you want regardless of the license. Thanks, |