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#Dragonvale mod invalid hash verification
#Dragonvale mod invalid hash code
#Dragonvale mod invalid hash password

#Dragonvale mod invalid hash password

/ /// the file to decrypt /// the to write the decrypted data to /// the password used as the key /// the method to call to notify of progress public static void DecryptFile( string inFile, string outFile,

#Dragonvale mod invalid hash code

By putting the hash at the end, I am able to verify the contents after decryption.Ĭopy Code /// /// takes an input file and decrypts it to the output file Once the input file is completely encrypted, I encrypt the hash and write it out. After this, I do the encryption of the file, while hashing the data.

These allow for some simple verifications of the file. Then after those two arrays are written, I encrypt and write the file size and a special tag (arbitrarily generated by me). For more information on these terms, check out Ritter's Crypto Glossary. This adds a little more security to the file. What is interesting about this method and makes it different than the other articles' methods, is the fact that I write out the IV and Salt to the beginning of the output file. read and the write the bytes to the crypto stream // in BUFFER_SIZEd chunks while( (read = fin.Read(bytes, 0,bytes.Length)) != 0 ) write the file cryptor tag to the file write the size of the file to the output fileīinaryWriter bw = new BinaryWriter(cout) Using(CryptoStream cout = new CryptoStream(fout,sma.CreateEncryptor(),Ĭhash = new CryptoStream(Stream.Null,hasher, write the IV and salt to the beginning of the file SymmetricAlgorithm sma = CryptoHelp.CreateRijndael(password, salt) Long lSize = fin.Length // the size of the input file for storing int size = ( int)lSize // the size of the input file for progressīyte bytes = new byte // the buffer int read = -1 // the amount of bytes read from the input file int value = 0 // the amount overall read from the input file for progress // generate IV and Salt

Using(FileStream fin = File.OpenRead(inFile), String password, CryptoProgressCallBack callback) / /// the file to encrypt /// the file to write the encrypted data to /// the password for use as the key /// the method to call to notify of progress public static void EncryptFile( string inFile, string outFile, The CodeĬopy Code /// /// This takes an input file and encrypts it into the output file> Since none of these verified the output, I wrote a class to fix this.

#Dragonvale mod invalid hash verification

Simple encrypting and decrypting data in C# by DotNetThis - Another good introduction, but does not do any file verification on the decrypted file.

Using CryptoStream in C# by WillemM - This was a short, simple, and to the point article.

These articles started me down the road of. So, I set out to write a class that would allow me to encrypt and then decrypt/verify that the contents had been written correctly. Then, as I was progressing and using the namespace, I noticed that if the file was the right size and padded correctly, even using a bad password would output a file. I noticed that there are a lot of articles and posts dealing with Cryptography in the. This article is an expansion on a few of the articles here on CodeProject.