Hello Lukas and all Synapse users,
some time ago I was asking on this list how to verify signed MIME message
parsed with TMimeMess. I used CAPICOM for that task, although Lukas said he
is using CryptoAPI directly. Now I found out that in Windows7 and WindowsXP
SP3 the implementation of CSP slightly changed and now it checks some
overflow which makes CAPICOM unusable for verifying messages bigger than cca
2MB. Problem can be solved by using low-level CryptoAPI functions. Does
anyone have any experience using those functions from Delphi? I don't want
to reinvent the wheel... I found some C code which is supposed to be
working, but with detached signature. I need to be able to verify (mainly,
probably only) attached signatures too. Code can be found here:
http://blogs.msdn.com/b/alejacma/archive/2010/04/09/how-to-call-cryptmsg-api-in-streaming-mode-c.aspx
If anyone can help me, or is willing to share some pieces of code, I would
be very grateful.
Greetings,
Peter
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