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(Tcl) Convert RSA Private Key to Public KeyDemonstrates how to get a public RSA key from a private RSA key. Note: This example requires Chilkat v11.0.0 or greater.
load ./chilkat.dll set success 0 set privKey [new_CkPrivateKey] # Step 1: Load the private key from a source. # (Chilkat can load private keys from all types of formats, and from in-memory bytes or encoded strings. # see the online reference documentation for more options.) set success [CkPrivateKey_LoadPemFile $privKey "qa_data/pem/VP_Private.pem"] if {$success == 0} then { puts [CkPrivateKey_lastErrorText $privKey] delete_CkPrivateKey $privKey exit } # Step 2: Get the public key object from the private key object. set pubKey [new_CkPublicKey] CkPrivateKey_ToPublicKey $privKey $pubKey # Step 3: Save the public key in a desired format. # (Chilkat can load or save public and private keys in many different formats. See # the online reference documentation for more options.) # Saves to a PKCS8 PEM file. set bPreferPkcs1 0 set success [CkPublicKey_SavePemFile $pubKey $bPreferPkcs1 "qa_data/pem/VP_Public.pem"] if {[CkPublicKey_get_LastMethodSuccess $pubKey] == 0} then { puts [CkPublicKey_lastErrorText $pubKey] delete_CkPrivateKey $privKey delete_CkPublicKey $pubKey exit } puts "Extracted and saved public key from private key." delete_CkPrivateKey $privKey delete_CkPublicKey $pubKey |
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