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Re: [TLS] CMS in OpenSSl

As this question is not about TLS, you should try asking on the openssl-users (http://www.openssl.org/support/) mailing list.

Best regards,
Pasi

From: tls-bounces@xxxxxxxx [mailto:tls-bounces@xxxxxxxx] On Behalf Of ext shankar ks
Sent: 01 April, 2008 10:21
To: tls@xxxxxxxx
Subject: [TLS] CMS in OpenSSl

Hi All,
 

I am  shankar, working on security issues using Openssl Api's. Our requirement is we need to Sign the file, compress the file , encrypt the file as a CMS(crypto graphic message syntax) package.
I am able to do the signing, compression, encryption using the OpenSSl Api's in C language. But our requirement is we need to envelope the signed , compressed and encrypted files as a CMS package.

Basically we are using 
RSA_sign
EVP_EncryptUpdate
RSA_public_encrypt for signing and encryption of the data.


But we did not understand how to implement those as a CMS package. I am thinking Implementing the above functions it self implementation of CMS, but I am not sure about it, can you please conform whether I am correct or not ? if I am wrong, is there any functions that I need to implement for the CMS.
And one more doubt is does using of openssl Api's will implement the CMS or not ?

If all my understating is wrong please let me know what are the implementations for the CMS using the openssl.
Please help me in this regard…
Thanks in advance
--Shankar

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