Tcl

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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Tcl


load ./chilkat.dll

set success 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).

set pubKey [new_CkPublicKey]

#  The Base64 of the DER-encoded public key.
set keyStr "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA...IDAQAB"

set success [CkPublicKey_LoadBase64 $pubKey $keyStr]
if {$success == 0} then {
    puts [CkPublicKey_lastErrorText $pubKey]
    delete_CkPublicKey $pubKey
    exit
}

puts "Loaded a [CkPublicKey_keyType $pubKey] public key."

delete_CkPublicKey $pubKey