(PureBasic) Generate RSA Public/Private Key Pair and Export to PEM

PureBasic example code showing how to generate an RSA public/private key pair and export to PEM files.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkPublicKey.pb"
IncludeFile "CkPrivateKey.pb"
IncludeFile "CkRsa.pb"

Procedure ChilkatExample()

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

    rsa.i = CkRsa::ckCreate()
    If rsa.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Generate a 1024-bit key.  Chilkat RSA supports
    ; key sizes ranging from 512 bits to 4096 bits.
    success.i = CkRsa::ckGenerateKey(rsa,1024)
    If success <> 1
        Debug CkRsa::ckLastErrorText(rsa)
        CkRsa::ckDispose(rsa)
        ProcedureReturn
    EndIf

    ; Keys are exported in XML format:
    publicKeyXml.s = CkRsa::ckExportPublicKey(rsa)
    Debug publicKeyXml

    privateKeyXml.s = CkRsa::ckExportPrivateKey(rsa)
    Debug privateKeyXml

    ; Save the private key in PEM format:
    privKey.i = CkPrivateKey::ckCreate()
    If privKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPrivateKey::ckLoadXml(privKey,privateKeyXml)
    success = CkPrivateKey::ckSavePemFile(privKey,"privateKey.pem")

    ; Save the public key in PEM format:
    pubKey.i = CkPublicKey::ckCreate()
    If pubKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkPublicKey::ckLoadFromString(pubKey,publicKeyXml)
    success = CkPublicKey::ckSavePemFile(pubKey,0,"publicKey.pem")


    CkRsa::ckDispose(rsa)
    CkPrivateKey::ckDispose(privKey)
    CkPublicKey::ckDispose(pubKey)


    ProcedureReturn
EndProcedure