(PureBasic) Get an Ed25519 Key in Raw Hex Format

Demonstrates how to get the private and public key parts of an Ed25519 key in lowercase hex formmat.

Note: This example requires Chilkat v9.5.0.83 or greater.

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IncludeFile "CkStringBuilder.pb"
IncludeFile "CkPrivateKey.pb"

Procedure ChilkatExample()

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

    ; Load an Ed25519 key from some format..
    privKey.i = CkPrivateKey::ckCreate()
    If privKey.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; This loads an Ed25519 key from an unencrypted PEM file (no password required).
    success.i = CkPrivateKey::ckLoadAnyFormatFile(privKey,"qa_data/eddsa/ed25519.pem","")
    If success = 0
        Debug CkPrivateKey::ckLastErrorText(privKey)
        CkPrivateKey::ckDispose(privKey)
        ProcedureReturn
    EndIf

    ; The key type should be "ed25519" to indicate an Ed25519 key.
    Debug "key type = " + CkPrivateKey::ckKeyType(privKey)

    ; What is the size of the private key in bits?  (should always be 256 bits for Ed25519)
    Debug "size in bits = " + Str(CkPrivateKey::ckBitLength(privKey))

    ; Get the private and public key parts in raw hex format:
    sbPubKeyHex.i = CkStringBuilder::ckCreate()
    If sbPubKeyHex.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    privKeyHex.s = CkPrivateKey::ckGetRawHex(privKey,sbPubKeyHex)

    ; We should have a 32-byte private key (a 64 character hex string).
    Debug "private key = " + privKeyHex

    ; We should have a 32-byte public key (a 64 character hex string).
    Debug "public key = " + CkStringBuilder::ckGetAsString(sbPubKeyHex)

    ; Sample output:
    ; key type = ed25519
    ; size in bits = 256
    ; private key = d4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842
    ; public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1


    CkPrivateKey::ckDispose(privKey)
    CkStringBuilder::ckDispose(sbPubKeyHex)


    ProcedureReturn
EndProcedure