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(PHP ActiveX) Get ECC Public Key from ECC Private KeyDemonstrates how to get an ECC public key from an ECC private key.
<?php // 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 new COM('Chilkat_9_5_0.Chilkat.PrivateKey') $privKey = new COM("Chilkat.PrivateKey"); $success = $privKey->LoadPemFile('qa_data/ecc/secp256r1-key-pkcs8.pem'); if ($success != 1) { print $privKey->LastErrorText . "\n"; exit; } // Get the public key. // pubKey is a Chilkat.PublicKey $pubKey = $privKey->GetPublicKey(); if ($privKey->LastMethodSuccess != 1) { print $privKey->LastErrorText . "\n"; exit; } // Save the public key to a PEM file. $success = $pubKey->SavePemFile(0,'qa_data/ecc/secp256r1-pubkey.pem'); if ($success != 1) { print $pubKey->LastErrorText . "\n"; exit; } // 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----- print 'Success.' . "\n"; ?> |
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