retrieve the client certificate chain from an ISAPI request

I would like to retrieve the entire client certificate chain from a request in ISAPI.I already succeeded to get the first certificate in the client's certificate chain by invoking the code below:

LPEXTENSION_CONTROL_BLOCK ecb_;
...
CERT_CONTEXT_EX cce;
memset(&cce,0,sizeof(CERT_CONTEXT_EX));
char certbuf[64*1024];
cce.cbAllocated =sizeof(certbuf);
cce.CertContext.pbCertEncoded =(BYTE *)&certbuf;
ecb_->ServerSupportFunction(ecb_->ConnID, HSE_REQ_GET_CERT_INFO_EX,&cce,0,0)

However, I did not find out how to retrieve the rest of the certificate chain from this CERT_CONTEXT_EX struct.

Changed this
[COLOR=#000000 ]
LPEXTENSION_CONTROL_BLOCK ecb_[/COLOR ][COLOR=#000000 ];[/COLOR ][COLOR=#000000 ]
[/COLOR ][COLOR=#000000 ]...[/COLOR ][COLOR=#000000 ]
CERT_CONTEXT_EX cce[/COLOR ][COLOR=#000000 ];[/COLOR ][COLOR=#000000 ]


Into this

Code:

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LPEXTENSION_CONTROL_BLOCK ecb_;
...
CERT_CONTEXT_EX cce;
memset(&cce,0,sizeof(CERT_CONTEXT_EX));
char certbuf[64*1024];
cce.cbAllocated =sizeof(certbuf);
cce.CertContext.pbCertEncoded =(BYTE *)&certbuf;
ecb_->ServerSupportFunction(ecb_->ConnID, HSE_REQ_GET_CERT_INFO_EX,&cce,0,0)

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> ServerSupportFunction
ServerSupportFunction Extension Function
Returns a boolean, and sets an error status you can retrieve with getLastError()

I suggest you start with that, then you can provide more information.

The example that I showed actually works properly and returns the end client certificate, as I mentioned in my first post. I want to get the entire client certificate chain, and have no idea how to accomplish this.

Quote:

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Originally Posted by Salem

> ServerSupportFunction
ServerSupportFunction Extension Function
Returns a boolean, and sets an error status you can retrieve with getLastError()

I suggest you start with that, then you can provide more information.

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So you want to Get a Certificate Chain for a Cert? This cryptically named function looks like it might help CertGetCertificateChain function (Windows)