Swift

Generate new DSA Key from OpenSSL Parameters File

See more DSA Examples

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

Swift

func chilkatTest() {
    var success: Bool = false

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

    let dsa = CkoDsa()!

    success = dsa.genKey(fromParamsDerFile: "dsaparam.der")
    if success != true {
        print("\(dsa.lastErrorText!)")
        return
    }

    // 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.

    var pemStr: String?
    var xmlStr: String?

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

    // Save the public key in PEM format:
    pemStr = dsa.toPublicPem()
    // This example will not check the return value of SaveText...
    success = dsa.saveText(strToSave: pemStr, path: "dsa_pub.pem")

    // Save the public key in DER format:
    success = dsa.toPublicDerFile(path: "dsa_pub.der")

    var bPublicOnly: Bool = true
    // Save to XML
    xmlStr = dsa.toXml(bPublicOnly: bPublicOnly)
    success = dsa.saveText(strToSave: pemStr, path: "dsa_pub.xml")

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

    // Unencrypted PEM:
    pemStr = dsa.toPem()
    success = dsa.saveText(strToSave: pemStr, path: "dsa_priv.pem")

    // Encrypted PEM:
    pemStr = dsa.toEncryptedPem(password: "myPassword")
    success = dsa.saveText(strToSave: pemStr, path: "dsa_privEncrypted.pem")

    // DER:
    success = dsa.toDerFile(path: "dsa_priv.der")

    // XML:
    bPublicOnly = false
    xmlStr = dsa.toXml(bPublicOnly: bPublicOnly)
    success = dsa.saveText(strToSave: pemStr, path: "dsa_priv.xml")

    print("Finished!")

}