(Lianja) Generate new DSA Key from OpenSSL Parameters File

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

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

loDsa = createobject("CkDsa")

llSuccess = loDsa.GenKeyFromParamsDerFile("dsaparam.der")
if (llSuccess <> .T.) then
    ? loDsa.LastErrorText
    release loDsa
    return
endif

// To generate a key from PEM, call GenKeyFromParamsPem 
// (for an in-memory PEM string) or GenKeyFromParamsFilePem
// for a PEM file.

// The public and private keys may now be exported to PEM, DER,
// and XML formatted 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(lcPemStr,"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(lcPemStr,"dsa_priv.xml")

? "Finished!"


release loDsa