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(PowerBuilder) Get EC Public Key from EC Private KeyDemonstrates how to get an EC public key from an EC private key. Note: This example requires Chilkat v11.0.0 or greater.
integer li_rc integer li_Success oleobject loo_PrivKey oleobject loo_PubKey li_Success = 0 // We have an ECC private key... // The contents of the private key PEM file look like this: // -----BEGIN PRIVATE KEY----- // MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg3J8q/24D1sEKGdP9 // 72MGYElLGpw/a56Y3t6pfON3uhShRANCAATlSmoizyhAwoYZAOuFBATl07/1RR54 // a1Dzfm16grxJe666AGKR+bSs24hk7TEpaeCTvT8YOOM3l+xKFg7zq6Q9 // -----END PRIVATE KEY----- loo_PrivKey = create oleobject li_rc = loo_PrivKey.ConnectToNewObject("Chilkat.PrivateKey") if li_rc < 0 then destroy loo_PrivKey MessageBox("Error","Connecting to COM object failed") return end if li_Success = loo_PrivKey.LoadPemFile("qa_data/ecc/secp256r1-key-pkcs8.pem") if li_Success = 0 then Write-Debug loo_PrivKey.LastErrorText destroy loo_PrivKey return end if // Get the public key. loo_PubKey = create oleobject li_rc = loo_PubKey.ConnectToNewObject("Chilkat.PublicKey") loo_PrivKey.ToPublicKey(loo_PubKey) // Save the public key to a PEM file. li_Success = loo_PubKey.SavePemFile(0,"qa_data/ecc/secp256r1-pubkey.pem") if li_Success = 0 then Write-Debug loo_PubKey.LastErrorText destroy loo_PrivKey destroy loo_PubKey return end if // The contents of the ECC public key PEM file look like this: // -----BEGIN PUBLIC KEY----- // MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA // AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA//// // ///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd // NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5 // RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA // //////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABOVKaiLPKEDChhkA64UEBOXT // v/VFHnhrUPN+bXqCvEl7rroAYpH5tKzbiGTtMSlp4JO9Pxg44zeX7EoWDvOrpD0= // -----END PUBLIC KEY----- Write-Debug "Success." destroy loo_PrivKey destroy loo_PubKey |
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