(Tcl) Generate an ECDSA Key

See more ECC Examples

Note: This example requires Chilkat v11.0.0 or greater.

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load ./chilkat.dll

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

# Create a Fortuna PRNG and seed it with system entropy.
# This will be our source of random data for generating the ECC private key.
set fortuna [new_CkPrng]

set entropy [CkPrng_getEntropy $fortuna 32 "base64"]
set success [CkPrng_AddEntropy $fortuna $entropy "base64"]

set ecc [new_CkEcc]

# Generate a random ECC private key on the secp256r1 curve.
# Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256k1.

set privKey [new_CkPrivateKey]

set success [CkEcc_GenKey $ecc "secp256r1" $fortuna $privKey]
if {$success != 1} then {
    puts [CkEcc_lastErrorText $ecc]
    delete_CkPrng $fortuna
    delete_CkEcc $ecc
    delete_CkPrivateKey $privKey
    exit
}

puts [CkPrivateKey_getXml $privKey]

# Save the private key to PKCS8 encrypted PEM
# (The private key can be saved in a variety of different formats. See the online reference documentation.)
set success [CkPrivateKey_SavePkcs8EncryptedPemFile $privKey "pemPassword" "myPemFiles/eccKey123.pem"]
if {$success != 1} then {
    puts [CkPrivateKey_lastErrorText $privKey]
}

puts "finished."

delete_CkPrng $fortuna
delete_CkEcc $ecc
delete_CkPrivateKey $privKey