Visual FoxPro

Generate RSA Key and Export to PKCS1 / PKCS8

See more RSA Examples

_LANGUAGE_ example code showing how to generate an RSA public/private key and save to PKCS1 and PKCS8 format files. In a PKCS1 or PKCS8 formatted file, the key is stored in binary ASN.1 format (and ASN.1 is itself written according to DER -- Distinguished Encoding Rules). A PEM file simply contains the binary ASN.1 base64 encoded and delimited by BEGIN/END lines. PKCS1 format files are never encrypted. PKCS8 can be encrypted or unencrypted. Public keys are never encrypted (there is no need). Private keys *should* always be encrypted - unless perhaps the unencrypted private key is obtained and itself stored in some sort of secure place. Visual FoxPro

LOCAL lnSuccess
LOCAL loRsa
LOCAL loPrivKey
LOCAL loPubKey
LOCAL lcPubKeyPem
LOCAL lcPubKeyPkcs8Base64
LOCAL lcPubKeyPkcs1Base64
LOCAL lcPrivKeyPem
LOCAL lcPrivKeyEncPem
LOCAL lcPrivKeyPkcs1Base64
LOCAL lcPrivKeyPkcs8Base64

lnSuccess = 0

* This example assumes the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

loRsa = CreateObject('Chilkat.Rsa')

* Generate a 2048-bit key.  Chilkat RSA supports
* key sizes ranging from 512 bits to 8192 bits.
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loRsa.GenKey(2048,loPrivKey)
IF (lnSuccess = 0) THEN
    ? loRsa.LastErrorText
    RELEASE loRsa
    RELEASE loPrivKey
    CANCEL
ENDIF

* Get the public key
loPubKey = CreateObject('Chilkat.PublicKey')
loPrivKey.ToPublicKey(loPubKey)

* Get the public key as a PKCS8 PEM string
lcPubKeyPem = loPubKey.GetPem(0)
? lcPubKeyPem

* Get the public key in PKCS8 format, in a Base64 encoded string.
lcPubKeyPkcs8Base64 = loPubKey.GetEncoded(0,"base64")
? lcPubKeyPkcs8Base64

* Get the public key in PKCS1 format, in a Base64 encoded string.
lcPubKeyPkcs1Base64 = loPubKey.GetEncoded(1,"base64")
? lcPubKeyPkcs1Base64

* Get the private key in a PKCS8 PEM string.
lcPrivKeyPem = loPrivKey.GetPkcs8Pem()
? lcPrivKeyPem

* Get the private key in a PKCS8 encrypted PEM string.
lcPrivKeyEncPem = loPrivKey.GetPkcs8EncryptedPem("myPassword")
? lcPrivKeyEncPem

* Get the private key in PKCS1 Base64 format
lcPrivKeyPkcs1Base64 = loPrivKey.GetPkcs1ENC("base64")
? lcPrivKeyPkcs1Base64

* Get the private key in PKCS8 Base64 format
lcPrivKeyPkcs8Base64 = loPrivKey.GetPkcs8ENC("base64")
? lcPrivKeyPkcs8Base64

* Save to PKCS1 / PKCS8 / PEM files...

* Save the public key to PKCS8 binary DER
lnSuccess = loPubKey.SaveDerFile(0,"pubKey_pkcs8.der")

* Save the public key to PKCS1 binary DER
lnSuccess = loPubKey.SaveDerFile("pubKey_pkcs1.der")

* Save the private key to unencrypted binary PKCS1 DER.
* Note: PKCS1 is never found in an encrypted format. 
lnSuccess = loPrivKey.SavePkcs1File("privKey_pkcs1.der")

* Save the private key to unencrypted binary PKCS8
lnSuccess = loPrivKey.SavePkcs8File("privKey_pkcs8.der")

* Save the private key to encrypted binary PKCS8
lnSuccess = loPrivKey.SavePkcs8EncryptedFile("myPassword","privKey_enc_pkcs8.der")

* Save the private key to unencrypted PKCS8 PEM
lnSuccess = loPrivKey.SavePkcs8PemFile("privKey.pem")

* Save the private key to encrypted PKCS8 PEM
lnSuccess = loPrivKey.SavePkcs8EncryptedPemFile("myPassword","privKey_enc.pem")

RELEASE loRsa
RELEASE loPrivKey
RELEASE loPubKey