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Lianja Examples

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(Lianja) DSA Generate Key

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

Chilkat Lianja Extension Download

Chilkat Lianja Extension

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

loDsa = createobject("CkDsa")

// Call GenKey to generate a new DSA key.
// The number of bits should be at least 1024 and a multiple
// of 64.   Typical values are either 1024 or 2048.
// DSA key generation is compute intensive and may take
// a short while to complete.
llSuccess = loDsa.GenKey(2048)
if (llSuccess <> .T.) then
    ? loDsa.LastErrorText
    release loDsa
    return
endif

// Extract the private and public parts to PEM or DER format
// and save to files...

// First for the public key...
// The public key never needs to be encrypted.

// Save the public key in PEM format:
lcPemStr = loDsa.ToPublicPem()
// This example will not check the return value of SaveText...
llSuccess = loDsa.SaveText(lcPemStr,"dsa_pub.pem")

// Save the public key in DER format:
llSuccess = loDsa.ToPublicDerFile("dsa_pub.der")

llBPublicOnly = .T.
// Save to XML
lcXmlStr = loDsa.ToXml(llBPublicOnly)
llSuccess = loDsa.SaveText(lcXmlStr,"dsa_pub.xml")

// ------------------------------------
// Now for the private key....
// ------------------------------------

// Unencrypted PEM:
lcPemStr = loDsa.ToPem()
llSuccess = loDsa.SaveText(lcPemStr,"dsa_priv.pem")

// Encrypted PEM:
lcPemStr = loDsa.ToEncryptedPem("myPassword")
llSuccess = loDsa.SaveText(lcPemStr,"dsa_privEncrypted.pem")

// DER:
llSuccess = loDsa.ToDerFile("dsa_priv.der")

// XML:
llBPublicOnly = .F.
lcXmlStr = loDsa.ToXml(llBPublicOnly)
llSuccess = loDsa.SaveText(lcXmlStr,"dsa_priv.xml")

? "Finished!"


release loDsa

 

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