On 10/11/2012 1:59 PM, redpath wrote:
I have a PKCS7 file with signature in the envelope.
What API function can I use to open the PKCS7 to extract the signature
data
and length
and then verify the message digest? The verify is shown below assuming
I got
the signature
data and length.
int rc = ECDSA_verify(0, md, 20, signaturedata, signaturelength,
pubeckey);
Kinda hard to find the right functions which seems to be a pretty common
thing.
I did search the forum for this.
There are two APIs for this:
CMS_verify()
and
PKCS7_dataVerify()
Each with a lot of related sibling functions.
Enjoy
Jakob
--
Jakob Bohm, CIO, Partner, WiseMo A/S. http://www.wisemo.com
Transformervej 29, 2730 Herlev, Denmark. Direct +45 31 13 16 10
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