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(PHP ActiveX) Get E-way Bill System Access TokenSends a request to get an E-way bill system access token.
<?php // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // First load the public key provided by the E-way bill System // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PublicKey') $pubkey = new COM("Chilkat.PublicKey"); $success = $pubkey->LoadFromFile('qa_data/pem/eway_publickey.pem'); if ($success != 1) { print $pubkey->LastErrorText . "\n"; exit; } // Encrypt the password using the RSA public key provided by eway.. $password = 'my_wepgst_password'; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rsa') $rsa = new COM("Chilkat.Rsa"); $rsa->Charset = 'utf-8'; $rsa->EncodingMode = 'base64'; $success = $rsa->ImportPublicKeyObj($pubkey); if ($success != 1) { print $rsa->LastErrorText . "\n"; exit; } // Returns the encrypted password as base64 (because the EncodingMode = "base64") $encPassword = $rsa->encryptStringENC($password,0); if ($rsa->LastMethodSuccess != 1) { print $rsa->LastErrorText . "\n"; exit; } // Generate a random app_key. This should be 32 bytes (us-ascii chars) // We need 32 bytes because we'll be doing 256-bit AES ECB encryption, and 32 bytes = 256 bits. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Prng') $prng = new COM("Chilkat.Prng"); // Generate a random string containing some numbers, uppercase, and lowercase. $app_key = $prng->randomString(32,1,1,1); print 'app_key = ' . $app_key . "\n"; // RSA encrypt the app_key. $encAppKey = $rsa->encryptStringENC($app_key,0); if ($rsa->LastMethodSuccess != 1) { print $rsa->LastErrorText . "\n"; exit; } // Prepare the JSON body for the HTTP POST that gets the access token. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject') $jsonBody = new COM("Chilkat.JsonObject"); $jsonBody->UpdateString('action','ACCESSTOKEN'); // Use your username instead of "09ABDC24212B1FK". $jsonBody->UpdateString('username','09ABDC24212B1FK'); $jsonBody->UpdateString('password',$encPassword); $jsonBody->UpdateString('app_key',$encAppKey); // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Http') $http = new COM("Chilkat.Http"); // Add required headers. // Use your ewb-user-id instead of "03AEXPR16A9M010" $http->SetRequestHeader('ewb-user-id','03AEXPR16A9M010'); // The Gstin should be the same as the username in the jsonBody above. $http->SetRequestHeader('Gstin','09ABDC24212B1FK'); $http->Accept = 'application/json'; // POST the JSON... // resp is a Chilkat.HttpResponse $resp = $http->PostJson2('http://ewb.wepgst.com/api/Authenticate','application/json',$jsonBody->emit()); if ($http->LastMethodSuccess != 1) { print $http->LastErrorText . "\n"; exit; } $respStatusCode = $resp->StatusCode; print 'response status code =' . $respStatusCode . "\n"; print 'response body:' . "\n"; print $resp->BodyStr . "\n"; if ($respStatusCode != 200) { print 'Failed in some unknown way.' . "\n"; exit; } // When the response status code = 200, we'll have either // success response like this: // {"status":"1","authtoken":"...","sek":"..."} // // or a failed response like this: // // {"status":"0","error":"eyJlcnJvckNvZGVzIjoiMTA4In0="} // Load the response body into a JSON object. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject') $json = new COM("Chilkat.JsonObject"); $json->Load($resp->BodyStr); $status = $json->IntOf('status'); print 'status = ' . $status . "\n"; if ($status != 1) { // Failed. Base64 decode the error // {"status":"0","error":"eyJlcnJvckNvZGVzIjoiMTA4In0="} // For an invalid password, the error is: {"errorCodes":"108"} // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbError = new COM("Chilkat.StringBuilder"); $json->StringOfSb('error',$sbError); $sbError->Decode('base64','utf-8'); print 'error: ' . $sbError->getAsString() . "\n"; exit; } // At this point, we know the request was entirely successful. $authToken = $json->stringOf('authtoken'); // Decrypt the sek key using our app_key. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2') $crypt = new COM("Chilkat.Crypt2"); $crypt->CryptAlgorithm = 'aes'; $crypt->CipherMode = 'ecb'; $crypt->KeyLength = 256; $crypt->SetEncodedKey($app_key,'us-ascii'); $crypt->EncodingMode = 'base64'; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData') $bdSek = new COM("Chilkat.BinData"); $bdSek->AppendEncoded($json->stringOf('sek'),'base64'); $crypt->DecryptBd($bdSek); // bdSek now contains the decrypted symmetric encryption key... // We'll use it to encrypt the JSON payloads we send. // Let's persist our authtoken and decrypted sek (symmetric encryption key). // To send EWAY requests (such as to create an e-way bill), we'll just load // and use these pre-obtained credentials. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject') $jsonEwayAuth = new COM("Chilkat.JsonObject"); $jsonEwayAuth->UpdateString('authToken',$authToken); $jsonEwayAuth->UpdateString('decryptedSek',$bdSek->getEncoded('base64')); $jsonEwayAuth->EmitCompact = 0; // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.FileAccess') $fac = new COM("Chilkat.FileAccess"); $fac->WriteEntireTextFile('qa_data/tokens/ewayAuth.json',$jsonEwayAuth->emit(),'utf-8',0); print 'Saved:' . "\n"; print $jsonEwayAuth->emit() . "\n"; // Sample output: // { // "authToken": "IBTeFtxNfVurg71LTzZ2r0xK7", // "decryptedSek": "5g1TyTie7yoslU3DrbYATa7mWyPazlODE7cEh5Vy4Ho=" // ?> |
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