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My first guess would be that you have an alignment problem. Delphi 7 stores a LongInt as 32 bit, while current Delphi versions align each LongInt to 64 bit (it still only contains 32 bit). There are many possible errors when using incorrect memory addressing. Or it could be inncorrect initialisation of IV when using CBC mode, but the offsets don't really match in the strings you have posted. Or you could start encryption at String[0] and encrypt the string length together with the data.
Could you share the code (include variable declaration)? Or could you share at least some test EXE which includes the encryption code?
Did you already try ASM debugging your code?
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10-20-2011, 15:44
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