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(Classic ASP) Get ECC Public Key from ECC Private KeyDemonstrates how to get an ECC public key from an ECC private key.
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <% ' 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----- ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.PrivateKey") set privKey = Server.CreateObject("Chilkat.PrivateKey") success = privKey.LoadPemFile("qa_data/ecc/secp256r1-key-pkcs8.pem") If (success <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>" Response.End End If ' Get the public key. ' pubKey is a Chilkat.PublicKey Set pubKey = privKey.GetPublicKey() If (privKey.LastMethodSuccess <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>" Response.End End If ' Save the public key to a PEM file. success = pubKey.SavePemFile(0,"qa_data/ecc/secp256r1-pubkey.pem") If (success <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( pubKey.LastErrorText) & "</pre>" Response.End 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----- Response.Write "<pre>" & Server.HTMLEncode( "Success.") & "</pre>" %> </body> </html> |
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