Xbase++

Load a Public Key from Base64 DER

Demonstrates the Chilkat PublicKey.LoadBase64 method, which loads a public key from standard Base64-encoded DER. The only argument is the Base64 string; whitespace within it is permitted.

Background: A public key in DER (binary) form is often carried as Base64 text so it can travel through channels that expect a string — a config value, a JSON field, a certificate export. This loader decodes that text and inspects the DER to determine the key type and structure automatically. It is the plain-Base64 counterpart to loading a full PEM block, which additionally has the BEGIN/END armor.

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LOCAL nSuccess
LOCAL oPubKey
LOCAL cKeyStr

nSuccess := 0

//  Demonstrates the PublicKey.LoadBase64 method, which loads a public key from standard
//  Base64-encoded DER.  The only argument is the Base64 string (whitespace is allowed).

oPubKey := CreateObject("Chilkat.PublicKey")

//  The Base64 of the DER-encoded public key.
cKeyStr := "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA...IDAQAB"

nSuccess := oPubKey:LoadBase64(cKeyStr)
IF (nSuccess == 0)
    ? oPubKey:LastErrorText
    oPubKey:destroy()
    RETURN
ENDIF

? "Loaded a " + oPubKey:KeyType + " public key."

oPubKey:destroy()