x509QueryCert

CryptoSys PKI Pro Manual

x509QueryCert

Query an X.509 certificate file for selected information.

Syntax

[VBA]

Public Function x509QueryCert ( _
    szCertFile As String, _
    szQuery As String, _
    Optional nOptions As Long = 0 _
) As String

Parameters

szCertFile

Name of X.509 certificate file (or base64 representation).

szQuery

Query string (case insensitive). Valid queries are:

"version"
"serialNumber"
"signatureAlgorithm"
"sigAlgId"
"signatureValue"
"notBefore"
"notAfter"
"issuerName"
"subjectName"
"subjectPublicKeyAlgorithm"
"subjectKeyIdentifier"
"authorityKeyIdentifier"
"rfc822Name"
"isCA"
"keyUsageString"
"extKeyUsageString"
"cRLDistributionPointsURI"
"authorityInfoAccessURI"
"subjectAltName"
"hashAlgorithm"
"pssParams"

nOptions

Use 0 for default or add any of:

PKI_X509_LATIN1 or PKI_X509_UTF8
PKI_X509_LDAP
PKI_X509_DECIMAL

Return Value

String: String containing the result or an empty string if not found or error.

Remarks

PKI_X509_UTF8 will output attribute string encoded in UTF-8. PKI_X509_LATIN1 will attempt to convert output to Latin-1 encoding.

Example

Debug.Print x509QueryCert("AliceRSASignByCarl.cer", "subjectName")
CN=AliceRSA

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