Certificates and Cryptography (Please HELP!)
From: M. Shawn Dillon (nollids@moc.ovc-erutrepa)
Date: 06/27/02
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From: "M. Shawn Dillon" <nollids@moc.ovc-erutrepa> Date: Thu, 27 Jun 2002 10:36:48 -0400
I am currently involved in a project which must be available for external
testing by COB this Friday (tomorrow) and am running into trouble with the
cryptography framework.
Our company is a MS shop, but we are working with another company that uses
a Java implementation. The goal is to be able to receive and verify signed
documents from this other company.
The other company will provide us with a public key (DSA, 1024 bits) in the
form of an X.509 certificate (sample attached), and a signed XML message.
What I need to be able to do is verify this signature.
I've read through the CryptoAPI documentation, the CAPICOM documentation,
and the System.Security.Cryptography documentation and have yet to find a
way to obtain a DSAParameters object (or associated public-key values) from
the given X.509 certificate.
Please, any help at all would be appreciated.
Thanks in advance,
M. Shawn Dillon, MCSD
Senior Developer
Aperture Credentialing, Inc.
sdillon@aperture-cvo.com.nospam
begin 666 signedMessage1.txt
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)/@H\+T)O9'D^
`
end
begin 666 message.txt
M/$UE<W-A9V4^#0H\4U-./C(S,3,Q,C,\+U-33CX-"CQ.86UE/E-M:71H+"!J
M;VAN/"].86UE/@T*/$%+04YA;64^;6%U<FEC93PO04M!3F%M93X-"CQ487AI
>9#XQ,C,T,S0V-3PO5&%X:60^#0H\+TUE<W-A9V4^
`
end
begin 666 test.cer
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A5V]O/0T*+2TM+2U%3D0@0T525$E&24-!5$4M+2TM+0T*
`
end
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