X509.GetCertFromP7Chain Method
Extract an X.509 certificate from a PKCS-7 "certs-only" certificate chain file, saving the output directly as a new file.
Syntax
[C#]
public static int GetCertFromP7Chain(
string outputFile,
string inputFile,
int index
)
[VB.NET]
Public Shared Function GetCertFromP7Chain ( _
outputFile As String, _
inputFile As String, _
index As Integer _
) As Integer
Parameters
- outputFile
- Name of output file to be created
- inputFile
- Name of the PKCS-7 "certs-only" file, or a string containing its PEM textual representation.
- index
- specifying which certificate (1,2,...) in the chain to extract.
Return Value
If successful and
index is greater than zero, it returns the number of bytes written to the output file, which may be zero if no certificate could be found at the given index. If an error occurred, it returns a negative
error code.
Remarks
[New in v12.2] To find the number of certificates in the chain, use GetCertCountInP7Chain. The old (deprecated) way to find the count of certificates was to set index to zero.
See Also
VB6/C equivalent: X509_GetCertFromP7Chain
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