VB.NET encryption and decryption. Ask Question. Up vote 1 down vote favorite. So i have a system about encryption using modulo. PHP Encryption & VB.net Decryption. Best way to use PHP to encrypt and decrypt passwords? Fundamental difference between Hashing and Encryption algorithms. Hello, I was wondering if anyone could be kind enough to assist with regarding decryption please? I am using the following functionality to encrypt some data to be passed through to Sage Pay. Edit: just add these 2 functions, if anyone has a test suite for this please let us know. Public Sub decrypt_3des(ByVal key() As Byte, ByVal initialXOR() As Byte, ByVal input() As Byte, ByVal inputLength As Integer, ByRef output() As Byte, ByRef outputLength As Integer) decrypt_3des(key, input, inputLength, output, outputLength) Dim i As Integer = 0 While i. Supercat9 27-Jan-10 5:34 27-Jan-10 5:34 • Why wasn't &HFFFFFFFF a valid UInt32? Because hex constants are treated as Int32 by default, unless you add UI to the end: &HFFFFFFFFUI. • I needed to convert bytes to UInt32 before left shifting them into a UInt32 (GET_UINT32 sub). This CUInt bug cost me about 4 hours. Decrypt 3des Vb.netAn ampersand suffix may be used as an alternative to UI. Thus &hFFFFFFFF&. The signed-vs-unsigned behavior can be annoying, though. For example, a statement like Var64 = Var64 And Not &h4000will work as expected to clear a single bit in a 64-bit variables unless the constant happens to be &h80000000. I don't know why Microsoft couldn't have used some nicer rules for combining variable types. For example, the result of using 'Not' on an unsigned quantity should be the next larger signed type, when applicable; using 'And' should yield the type of the smaller unsigned operand, if any. It's silly that 'ByteVariable = ByteVariable And 1' yields an error when strict is on (converting Integer to Byte) and yet 'ByteVariable = ByteVariable + CByte(1)' does not (even though the former could never fail, while latter could produce an overflow). The lack of any concise way of notating a byte constant doesn't help things. Ted Ehrich wrote:Yeah, these type conversion quirks suck but I suppose it's better than explicitly converting everything. 3des Decryption Vb.netI wonder how much if it is backwards compatibility, like the whole AndAlso and OrElse nonsense. The AndAlso and OrElse keywords are fine with me. There's a need for both forced-evaluation and optional-evaluation constructs in a language. If using 'And' and 'Or' with booleans yielded AndAlso/OrElse behavior, what keywords would you suggest for the forced-evaluation case? As for numerical conversions, I think the biggest problem was Microsoft's desire to allow constructs like 'ByteVar = Not ByteVar' or 'IntVar = Intvar And Not 2' usually work as expected, without taking the step that would have best allowed such things to happen (either recognizing that 'Var = Not (Expression)' and '(Expr1) And Not (Expr2)' are special cases that should be regarded as special operators, or introducing numerical types InvUInt8, InvUint16, InvUint32, and IntUInt64 which should, if cast to larger types, have all the high bits set. Last Visit: 31-Dec-99 18:00 Last Update: 16-Aug-18 14:35 1 General News Suggestion Question Bug Answer Joke Praise Rant Admin Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.
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