Visual FoxPro

How to Parse a X.509 Certificate and Extract its Public Key

See more Certificates Examples

Demonstrates how to load an X.509 certificate and extract the public key. Chilkat supports many certificate encodings:

• DER (binary) encoded certificates (.crt/.cer)
• PEM (BASE64) encoded certificates (.pem)
• Load Certificates Directly from Windows Certificate Stores
• PFX/PKCS12 (.pfx/.p12)
• Java KeyStore (.jks)
• Cryptographic Message Syntax Standard - PKCS #7 Certificates (.P7B)

Visual FoxPro

LOCAL lnSuccess
LOCAL loCert
LOCAL loPubKey

lnSuccess = 0

loCert = CreateObject('Chilkat.Cert')

*  Load a DER (binary) encoded certificate.
*  To load from a .pem or .p7b, or any other file format that contains
*  just one certificate, call LoadFromFile in exactly the same way.
*  The LoadFromFile method automatically detects the format and loads the certificate.
lnSuccess = loCert.LoadFromFile("qa_data/certs/testCert.cer")
IF (lnSuccess = 0) THEN
    ? loCert.LastErrorText
    RELEASE loCert
    CANCEL
ENDIF

*  Get the public key:
loPubKey = CreateObject('Chilkat.PublicKey')
loCert.GetPublicKey(loPubKey)

*  Examine the key type.
*  A PublicKey object can contain an RSA, ECC, or DSA public key.
*  The KeyType property will contain "rsa", "ecc", or "dsa".
? "key type = " + loPubKey.KeyType

RELEASE loCert
RELEASE loPubKey