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(Visual FoxPro) Convert Java KeyStore to PKCS12 / PFX
Loads a Java keystore file and saves it as a PKCS12 / PFX. A Java keystore (JKS) can contain two types of entries: (1) trusted root certificates or (2) private keys + cert chains. Usually a JKS will contain all entries of one type or another (and thus a particular JKS serves one purpose or another; meaning that a JKS containing trusted roots is used as a source for verifying pre-trusted roots, and a JKS containing private keys (and cert chains) is used as a secure, encrypted store for private keys).
A PKCS12 / PFX typically contains one or more private keys, along with each private key's certificate chain. Therefore, it typically makes sense to only write the private key entries to a PKCS12 (and the associated certificate chains). If a JKS contains trusted root certificates, it makes more sense to conver it to a PEM file (such as the CA cert bundle in PEM format from mozilla.org).
LOCAL loJks LOCAL lcJksPassword LOCAL lnSuccess LOCAL loPkcs12 LOCAL lnNumPrivateKeys LOCAL i LOCAL loPrivKey LOCAL loCertChain LOCAL lcPkcs12Password * This requires the Chilkat API to have been previously unlocked. * See Global Unlock Sample for sample code. loJks = CreateObject('Chilkat_9_5_0.JavaKeyStore') lcJksPassword = "myJksPassword" * Load the Java keystore from a file. The JKS file password is used * to verify the keyed digest that is found at the very end of the keystore. * It verifies that the keystore has not been modified. lnSuccess = loJks.LoadFile(lcJksPassword,"/someDir/keyStore.jks") IF (lnSuccess <> 1) THEN ? loJks.LastErrorText RELEASE loJks CANCEL ENDIF * To convert, we'll access the private key entries * from the JKS, add each to the PKCS12, and then save the PKCS12. loPkcs12 = CreateObject('Chilkat_9_5_0.Pfx') lnNumPrivateKeys = loJks.NumPrivateKeys * For each private key entry, get the private key and * the associated certificate chain. * Each private key is password protected. Usually it is the same * password as used for the keyed digest of the entire JKS. * However, this does not have to be. The password is passed * here to handle the possibility of each private key requiring * a different password. i = 0 DO WHILE i < lnNumPrivateKeys loPrivKey = loJks.GetPrivateKey(lcJksPassword,i) ? loJks.GetPrivateKeyAlias(i) loCertChain = loJks.GetCertChain(i) * Add the private key and it's associated certificate chain to the PKCS12. lnSuccess = loPkcs12.AddPrivateKey(loPrivKey,loCertChain) IF (lnSuccess <> 1) THEN ? loPkcs12.LastErrorText RELEASE loCertChain RELEASE loPrivKey RELEASE loJks RELEASE loPkcs12 CANCEL ENDIF RELEASE loCertChain RELEASE loPrivKey i = i + 1 ENDDO * Save the PKCS12 / PFX to a file. * The password can be the same as the JKS password, or something new. * (With the PKCS12 format, there is a single password for the entire contents * of the file. With the JKS format, there is flexibility in allowing each private key * to have it's own password.) lcPkcs12Password = "myNewPassword" lnSuccess = loPkcs12.ToFile(lcPkcs12Password,"/pkcs12_files/myPfx.p12") IF (lnSuccess <> 1) THEN ? loPkcs12.LastErrorText ELSE ? "Successfully saved to PKCS12 format." ENDIF RELEASE loJks RELEASE loPkcs12
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