Xbase++

DSA Generate Key

See more DSA Examples

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-----

Xbase++

LOCAL nSuccess
LOCAL oDsa
LOCAL cPemStr
LOCAL cXmlStr
LOCAL nBPublicOnly

nSuccess := 0

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

oDsa := CreateObject("Chilkat.Dsa")

//  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.
nSuccess := oDsa:GenKey(2048)
IF (nSuccess != 1)
    ? oDsa:LastErrorText
    oDsa:destroy()
    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:
cPemStr := oDsa:ToPublicPem()
//  This example will not check the return value of SaveText...
nSuccess := oDsa:SaveText(cPemStr, "dsa_pub.pem")

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

nBPublicOnly := 1
//  Save to XML
cXmlStr := oDsa:ToXml(nBPublicOnly)
nSuccess := oDsa:SaveText(cXmlStr, "dsa_pub.xml")

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

//  Unencrypted PEM:
cPemStr := oDsa:ToPem()
nSuccess := oDsa:SaveText(cPemStr, "dsa_priv.pem")

//  Encrypted PEM:
cPemStr := oDsa:ToEncryptedPem("myPassword")
nSuccess := oDsa:SaveText(cPemStr, "dsa_privEncrypted.pem")

//  DER:
nSuccess := oDsa:ToDerFile("dsa_priv.der")

//  XML:
nBPublicOnly := 0
cXmlStr := oDsa:ToXml(nBPublicOnly)
nSuccess := oDsa:SaveText(cXmlStr, "dsa_priv.xml")

? "Finished!"

oDsa:destroy()