How to parse multiple private key/Certificate pairs in the p12 structure

[Jie Zhang]

Hello everybody,

I have questions concerns PKCS#12 file and hope that someone 
can help me with it:

It seems that it is possible to save a bunch of private 
key/certificate pairs into one pkcs#12 file. So my question 
is how can we use OpenSSL functions to read all the private 
key/certificate pairs from the pkcs#12 file? I used 
PKCS12_parse() to parse a PKCS#12 structure before, but this 
function seems just return one private key/certificate pair.

And in the OpenSSL doc it is said:
"Only a single private key and corresponding certificate is 
returned by this function. More complex PKCS#12 files with 
multiple private keys will only return the first match."

Does anybody has any idea about how to retrieve the multiple
private key/certificate pair from the p12 structure?

Thanks a lot in advance!

Jie

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