Online PHP editor | rfc for EuNF0

<?php function m24g($bArr, $modulus, $exponent) { $publicKey = m23h($modulus, $exponent); if (openssl_public_encrypt($bArr, $encryptedData, $publicKey, OPENSSL_PKCS1_PADDING)) { return $encryptedData; } else { throw new Exception('Encryption failed: ' . openssl_error_string()); } } function m23h($modulus, $exponent) { $modulus = ensure_even_length($modulus); $exponent = ensure_even_length($exponent); $rsa = [ 'n' => base64url_encode(hex2bin($modulus)), 'e' => base64url_encode(hex2bin($exponent)), ]; $keyDetails = [ 'kty' => 'RSA', 'n' => $rsa['n'], 'e' => $rsa['e'], ]; return jwkToPem($keyDetails); } function ensure_even_length($hex) { return (strlen($hex) % 2 != 0) ? '0' . $hex : $hex; } function base64url_encode($data) { return rtrim(strtr(base64_encode($data), '+/', '-_'), '='); } function base64url_decode($data) { return base64_decode(strtr($data, '-_', '+/')); } function jwkToPem(array $jwk) { $modulus = base64url_decode($jwk['n']); $publicExponent = base64url_decode($jwk['e']); $components = [ 'modulus' => $modulus, 'publicExponent' => $publicExponent, ]; $asn1Sequence = createPublicKey($components); $pem = "-----BEGIN PUBLIC KEY-----\n" . chunk_split(base64_encode($asn1Sequence), 64, "\n") . "-----END PUBLIC KEY-----\n"; return $pem; } function createPublicKey($components) { $modulus = $components['modulus']; $publicExponent = $components['publicExponent']; $modulus = "\x00" . $modulus; // Ensure positive number $sequence = pack('Ca*a*', 0x30, createLengthPrefix(strlen($modulus) + strlen($publicExponent) + 4), pack('Ca*', 0x02, createLengthPrefix(strlen($modulus)) . $modulus) . pack('Ca*', 0x02, createLengthPrefix(strlen($publicExponent)) . $publicExponent)); return pack('Ca*a*', 0x30, createLengthPrefix(strlen($sequence) + 13), pack('H*', '300D06092A864886F70D0101010500') . pack('Ca*', 0x03, createLengthPrefix(strlen($sequence) + 1) . "\x00" . $sequence)); } function createLengthPrefix($length) { if ($length < 128) { return chr($length); } $temp = ltrim(pack('N', $length), "\x00"); return chr(0x80 | strlen($temp)) . $temp; } // Usage example try { $modulus = '113744026899259137585420519641795445506522315843166624587737104823905995993308512746423780711220091509477248711684203860721990053300351123157272120027826616226336455748256059222713368430653450802331260182403534624073361236909650202772541076543992882238347687352553725072578344237693663853480535496066481835463'; // Hexadecimal string of modulus $exponent = '65537'; // Hexadecimal string of exponent $dataToEncrypt = "912c1366-d5e0-c63a-e91d-7d6a495da509|147963"; $encryptedData = m24g($dataToEncrypt, $modulus, $exponent); echo "Encrypted Data: " . base64_encode($encryptedData) . "\n"; } catch (Exception $e) { echo 'Error: ' . $e->getMessage() . "\n"; } ?>

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