Export Digital Certificate's Public Key

The ExportPublicKey method can be called to get a certificate's public key. It can then be saved to any of a number of formats: (1) OpenSSL DER, (2) OpenSSL PEM, (3) RSA DER, (4) XML.

LOCAL loCert
LOCAL lnSuccess
LOCAL loPubkey

loCert = CreateObject('Chilkat.Cert')

*  LoadFromFile will load virtually any certificate format file.
*  It will auto-recognize the format and load appropiately.
lnSuccess = loCert.LoadFromFile("/Users/chilkat/testData/cer/chilkat.cer")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    QUIT
ENDIF

*  Get the public key:

loPubkey = loCert.ExportPublicKey()
IF (loPubkey = NULL ) THEN
    ? loCert.LastErrorText
    QUIT
ENDIF

*  Save to various formats:
lnSuccess = loPubkey.SaveOpenSslDerFile("/Users/chilkat/testData/pubkeys/chilkat_openSsl.der")
IF (lnSuccess <> 1) THEN
    ? loPubkey.LastErrorText
    RELEASE loPubkey
    QUIT
ENDIF

lnSuccess = loPubkey.SaveOpenSslPemFile("/Users/chilkat/testData/pubkeys/chilkat_openSsl.pem")
IF (lnSuccess <> 1) THEN
    ? loPubkey.LastErrorText
    RELEASE loPubkey
    QUIT
ENDIF

lnSuccess = loPubkey.SaveRsaDerFile("/Users/chilkat/testData/pubkeys/chilkat_rsa.der")
IF (lnSuccess <> 1) THEN
    ? loPubkey.LastErrorText
    RELEASE loPubkey
    QUIT
ENDIF

lnSuccess = loPubkey.SaveXmlFile("/Users/chilkat/testData/pubkeys/chilkat.xml")
IF (lnSuccess <> 1) THEN
    ? loPubkey.LastErrorText
    RELEASE loPubkey
    QUIT
ENDIF

RELEASE loPubkey
? "Public key exported to all file formats."