Tcl

Load a Public Key from a File

Demonstrates the Chilkat PublicKey.LoadFromFile method, which loads a public key from a file. The only argument is the file path. Chilkat examines the file content rather than the extension, accepting binary DER, PEM, Chilkat XML, JWK, and other supported representations.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: The most convenient loader when a key sits in a file of unknown format — it reads the bytes and detects DER, PEM, XML, or JWK without you having to match a format-specific method. Because it keys off content rather than the filename, a mislabeled extension does not trip it up. This is the pragmatic default for applications that accept public keys from users or varied sources.

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Tcl


load ./chilkat.dll

set success 0

#  Demonstrates the PublicKey.LoadFromFile method, which loads a public key from a file.  The only
#  argument is the file path.  Chilkat examines the file content (not the extension), accepting
#  binary DER, PEM, Chilkat XML, JWK, and other supported representations.

set pubKey [new_CkPublicKey]

set success [CkPublicKey_LoadFromFile $pubKey "qa_data/public.pem"]
if {$success == 0} then {
    puts [CkPublicKey_lastErrorText $pubKey]
    delete_CkPublicKey $pubKey
    exit
}

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

delete_CkPublicKey $pubKey