This line near the top says you’re adding AES functionality to NSMutableData: @implementation NSMutableData(AES) In Objective-C, this is called a category; categories let you extend an existing class. This code would typically go in a file named NSMutableData-AES.m. Create a header file too, NSMutableData-AES.h. It should contain: @interface NSMutableData(AES) – (NSMutableData*) EncryptAES: (NSString *) key; … Read more
Most block ciphers are going to use larger than 32-bit sized blocks, for security reasons. However, I found one that is made specifically for what you are doing: Skip32 You may consider using a GUID, but perhaps you have reasons you want to avoid that. (Say, your app is done already.) Edit: Actually, if a … Read more
The main issue appears to be that your string_encrypt and string_decrypt PHP functions don’t have access to the $key variable, so for the encryption key mcrypt_encrypt is using \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0. See this question for an explanation. PHP should report a notice that key is undefined, have you turned off error reporting perhaps? Echo the key from … Read more
Well, I got this issue solved. It appears that by creating a self-signed certificate, using keytool, without providing -keyalg parameter makes the key-pair algorithm default to DSA. None of my ciphers suite included DSA algorithm. In that case, although the client and the server had intersection between their cipher-suites, neither was suitable for the key … Read more
How to build the Qt-SQL-driver-plugin ‘QSQLCIPHER’ for SQLite-DB with SQLCipher-extension using the Windows/MinGW-platform: Qt 5.4.0 for Windows/MinGW Download Qt Install including the sources e.g to C:\Qt\Qt5.4.0 OpenSSL for Windows Download Win32 OpenSSL v1.0.2a Download Visual C++ 2008 Redistributable Install Visual C++ 2008 Redistributable by executing ‘vcredist_x86.exe’ Install OpenSSL v1.0.2a by executing ‘Win32OpenSSL-1_0_2.exe’ Target directory e.g. … Read more
Here is a way to do it in VB From: http://www.devcity.net/Articles/47/1/encrypt_querystring.aspx Wrapper for the encryption code: Pass your querystring parameters into this, and change the key!!! Private _key as string = “!#$a54?3” Public Function encryptQueryString(ByVal strQueryString As String) As String Dim oES As New ExtractAndSerialize.Encryption64() Return oES.Encrypt(strQueryString, _key) End Function Public Function decryptQueryString(ByVal strQueryString As … Read more
Simply , the .net framework allows you to do that , see http://msdn.microsoft.com/en-us/library/89211k9b(v=vs.80).aspx Relevant information: This goes into the machine.config file: <configProtectedData defaultProvider=”RsaProtectedConfigurationProvider”> <providers> <add name=”RsaProtectedConfigurationProvider” type=”System.Configuration.RsaProtectedConfigurationProvider, … /> <add name=”DataProtectionConfigurationProvider” type=”System.Configuration.DpapiProtectedConfigurationProvider, … /> </providers> </configProtectedData> And this is the application code: Shared Sub ToggleConfigEncryption(ByVal exeConfigName As String) ‘ Takes the executable file name without … Read more
Disclaimer: I have zero iPhone development experience. Short answer – what tc. said. Something is horribly wrong with the AES256EncryptWithKey: Being AES256 you would expect it to require a 32 byte key, not a 16 byte key. But OK, say it pads shorter keys with null bytes to make them 32 bytes. This might explain … Read more
There is one issue that many of the references above overlook, and that is just prior to returning the encrypted string, URL Encode (see below right before the string is returned). I am using IIS 7.5, and it will automatically “Decode” the string for you, so the decryption “should” be OK. Both the Encrypt and … Read more
One of the cool things about XOR encryption is that when you apply it twice, you get back the original string – see http://en.wikipedia.org/wiki/XOR_cipher. In your function, xor_decrypt, you take string and key and return string ^ key. If, now, you xor that with the key again, you get (string ^ key) ^ key = string … Read more