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(PHP Extension) Create a Hash Signature for Value Added Tax Audit SOAP Message for AngolaDemonstrates how to create a hash signature that is required in Value Added Tax Audit Files in Angola, Africa. It is the following two instructions that should be used to create a hash value to be put into a <hash></hash> field in SOAP XML file containing the tax data for the VAT authorities: openssl dgst -shal -sign private.pem -outRegisto1.shal Registo1.txt then openssl enc -base64 - in Registo1.shal -out Registo1.b64 -A
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $pkey = new CkPrivateKey(); // Load the private key from an PEM file. // Provide the password in the 2nd argument. // If no password is needed, just pass an empty string. $success = $pkey->LoadAnyFormatFile('qa_data/rsa/rsaPrivKey_secret.pem','secret'); if ($success != true) { print $pkey->lastErrorText() . "\n"; exit; } // Assuming this is an RSA private key.. $rsa = new CkRsa(); // Import the private key into the RSA object: $success = $rsa->ImportPrivateKeyObj($pkey); if ($success != true) { print $rsa->lastErrorText() . "\n"; exit; } // OpenSSL uses big-endian. $rsa->put_LittleEndian(false); // SHA1 hash and sign, and return base64. $rsa->put_EncodingMode('base64'); $b64sig = $rsa->signStringENC('2018-05-18,2018-05-18T11:22:19;FAC 001/18;53.00;','sha1'); print $b64sig . "\n"; // The signature is equal in size to your private key. For example, if you have a 1024-bit RSA key, // then 1024 bits = 128 bytes. When 128 bytes is base64 encoded, the result is a string approximately // 4/3rds the size of the original. 128 * 4 / 3 = (approximately) 172 bytes. // If your RSA key is 2048-bits, then your signature will be twice as long. ?> |
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