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(PHP ActiveX) JWE using RSAES-PKCS1-v1_5 and AES_128_CBC_HMAC_SHA_256This example duplicates the example A.2 in RFC 7516 for JSON Web Encryption (JWE). Note: This example requires Chilkat v9.5.0.66 or greater.
<?php // This requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Note: This example requires Chilkat v9.5.0.66 or greater. $plaintext = 'Live long and prosper.'; // First build the JWE Protected Header. // We want to build this: {"alg":"RSA1_5","enc":"A128CBC-HS256"} // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject') $jweProtHdr = new COM("Chilkat.JsonObject"); $jweProtHdr->AppendString('alg','RSA1_5'); $jweProtHdr->AppendString('enc','A128CBC-HS256'); print 'JWE Protected Header: ' . $jweProtHdr->emit() . "\n"; print '--' . "\n"; // The specific RSA key used in the A.2 example is the following JWK: // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbJwk = new COM("Chilkat.StringBuilder"); $sbJwk->Append('{\'kty\':\'RSA\','); $sbJwk->Append('\'n\':\'sXchDaQebHnPiGvyDOAT4saGEUetSyo9MKLOoWFsueri23bOdgWp4Dy1Wl'); $sbJwk->Append('UzewbgBHod5pcM9H95GQRV3JDXboIRROSBigeC5yjU1hGzHHyXss8UDpre'); $sbJwk->Append('cbAYxknTcQkhslANGRUZmdTOQ5qTRsLAt6BTYuyvVRdhS8exSZEy_c4gs_'); $sbJwk->Append('7svlJJQ4H9_NxsiIoLwAEk7-Q3UXERGYw_75IDrGA84-lA_-Ct4eTlXHBI'); $sbJwk->Append('Y2EaV7t7LjJaynVJCpkv4LKjTTAumiGUIuQhrNhZLuF_RJLqHpM2kgWFLU'); $sbJwk->Append('7-VTdL1VbC2tejvcI2BlMkEpk1BzBZI0KQB0GaDWFLN-aEAw3vRw\','); $sbJwk->Append('\'e\':\'AQAB\','); $sbJwk->Append('\'d\':\'VFCWOqXr8nvZNyaaJLXdnNPXZKRaWCjkU5Q2egQQpTBMwhprMzWzpR8Sxq'); $sbJwk->Append('1OPThh_J6MUD8Z35wky9b8eEO0pwNS8xlh1lOFRRBoNqDIKVOku0aZb-ry'); $sbJwk->Append('nq8cxjDTLZQ6Fz7jSjR1Klop-YKaUHc9GsEofQqYruPhzSA-QgajZGPbE_'); $sbJwk->Append('0ZaVDJHfyd7UUBUKunFMScbflYAAOYJqVIVwaYR5zWEEceUjNnTNo_CVSj'); $sbJwk->Append('-VvXLO5VZfCUAVLgW4dpf1SrtZjSt34YLsRarSb127reG_DUwg9Ch-Kyvj'); $sbJwk->Append('T1SkHgUWRVGcyly7uvVGRSDwsXypdrNinPA4jlhoNdizK2zF2CWQ\','); $sbJwk->Append('\'p\':\'9gY2w6I6S6L0juEKsbeDAwpd9WMfgqFoeA9vEyEUuk4kLwBKcoe1x4HG68'); $sbJwk->Append('ik918hdDSE9vDQSccA3xXHOAFOPJ8R9EeIAbTi1VwBYnbTp87X-xcPWlEP'); $sbJwk->Append('krdoUKW60tgs1aNd_Nnc9LEVVPMS390zbFxt8TN_biaBgelNgbC95sM\','); $sbJwk->Append('\'q\':\'uKlCKvKv_ZJMVcdIs5vVSU_6cPtYI1ljWytExV_skstvRSNi9r66jdd9-y'); $sbJwk->Append('BhVfuG4shsp2j7rGnIio901RBeHo6TPKWVVykPu1iYhQXw1jIABfw-MVsN'); $sbJwk->Append('-3bQ76WLdt2SDxsHs7q7zPyUyHXmps7ycZ5c72wGkUwNOjYelmkiNS0\','); $sbJwk->Append('\'dp\':\'w0kZbV63cVRvVX6yk3C8cMxo2qCM4Y8nsq1lmMSYhG4EcL6FWbX5h9yuv'); $sbJwk->Append('ngs4iLEFk6eALoUS4vIWEwcL4txw9LsWH_zKI-hwoReoP77cOdSL4AVcra'); $sbJwk->Append('Hawlkpyd2TWjE5evgbhWtOxnZee3cXJBkAi64Ik6jZxbvk-RR3pEhnCs\','); $sbJwk->Append('\'dq\':\'o_8V14SezckO6CNLKs_btPdFiO9_kC1DsuUTd2LAfIIVeMZ7jn1Gus_Ff'); $sbJwk->Append('7B7IVx3p5KuBGOVF8L-qifLb6nQnLysgHDh132NDioZkhH7mI7hPG-PYE_'); $sbJwk->Append('odApKdnqECHWw0J-F0JWnUd6D2B_1TvF9mXA2Qx-iGYn8OVV1Bsmp6qU\','); $sbJwk->Append('\'qi\':\'eNho5yRBEBxhGBtQRww9QirZsB66TrfFReG_CcteI1aCneT0ELGhYlRlC'); $sbJwk->Append('tUkTRclIfuEPmNsNDPbLoLqqCVznFbvdB7x-Tl-m0l_eFTj2KiqwGqE9PZ'); $sbJwk->Append('B9nNTwMVvH3VRRSLWACvPnSiwP8N5Usy-WRXS-V7TbpxIhvepTfE0NNo\''); $sbJwk->Append('}'); // Load this JWK into a Chilkat private key object. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey') $rsaPrivKey = new COM("Chilkat.PrivateKey"); $success = $rsaPrivKey->LoadJwk($sbJwk->getAsString()); if ($success != 1) { print $rsaPrivKey->LastErrorText . "\n"; exit; } // The public key is used to encrypt (i.e. create the JWE), // and the private key is used to decrypt. // The RSA public key is simply a subset of the private key. The RSA public key // is composed of the "n" and "e" members shown above. These are also known as the // modulus and exponent. // We can simply get the public key object from the private key object // rsaPubKey is a Chilkat.PublicKey $rsaPubKey = $rsaPrivKey->GetPublicKey(); // Create the JWE... // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Jwe') $jwe = new COM("Chilkat.Jwe"); $jwe->SetProtectedHeader($jweProtHdr); $jwe->SetPublicKey(0,$rsaPubKey); $strJwe = $jwe->encrypt($plaintext,'utf-8'); if ($jwe->LastMethodSuccess != 1) { print $jwe->LastErrorText . "\n"; exit; } // Show the JWE we just created: print $strJwe . "\n"; // Note: The RSA PKCS1_V1_5 padding uses random value, and the results // will be different each time. However, each result should be successfully // decrypting if using the correct RSA private key. // Let's decrypt the JWE that was just produced. // Do the following to decrypt a JWE: // 1) Load the JWE. // 2) Set the private key for decryption. // 3) Decrypt. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Jwe') $jwe2 = new COM("Chilkat.Jwe"); $success = $jwe2->LoadJwe($strJwe); if ($success != 1) { print $jwe2->LastErrorText . "\n"; exit; } // Provide the RSA private key for decryption. // (The JWE was encrypted for a single recipient at index 0.) $jwe2->SetPrivateKey(0,$rsaPrivKey); // Decrypt. $originalPlaintext = $jwe2->decrypt(0,'utf-8'); if ($jwe2->LastMethodSuccess != 1) { print $jwe2->LastErrorText . "\n"; exit; } print 'original text: ' . "\n"; print $originalPlaintext . "\n"; // --------------------------------------------------------------------------------- // It should also be possible to decrypt the JWE as shown in RFC 7516, Appendix A.2.7 // because it was produced using the same RSA key. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder') $sbJwe = new COM("Chilkat.StringBuilder"); $sbJwe->Append('eyJhbGciOiJSU0ExXzUiLCJlbmMiOiJBMTI4Q0JDLUhTMjU2In0.'); $sbJwe->Append('UGhIOguC7IuEvf_NPVaXsGMoLOmwvc1GyqlIKOK1nN94nHPoltGRhWhw7Zx0-kFm'); $sbJwe->Append('1NJn8LE9XShH59_i8J0PH5ZZyNfGy2xGdULU7sHNF6Gp2vPLgNZ__deLKxGHZ7Pc'); $sbJwe->Append('HALUzoOegEI-8E66jX2E4zyJKx-YxzZIItRzC5hlRirb6Y5Cl_p-ko3YvkkysZIF'); $sbJwe->Append('NPccxRU7qve1WYPxqbb2Yw8kZqa2rMWI5ng8OtvzlV7elprCbuPhcCdZ6XDP0_F8'); $sbJwe->Append('rkXds2vE4X-ncOIM8hAYHHi29NX0mcKiRaD0-D-ljQTP-cFPgwCp6X-nZZd9OHBv'); $sbJwe->Append('-B3oWh2TbqmScqXMR4gp_A.'); $sbJwe->Append('AxY8DCtDaGlsbGljb3RoZQ.'); $sbJwe->Append('KDlTtXchhZTGufMYmOYGS4HffxPSUrfmqCHXaI9wOGY.'); $sbJwe->Append('9hH0vgRfYgPnAHOd8stkvw'); $success = $jwe2->LoadJweSb($sbJwe); if ($success != 1) { print $jwe2->LastErrorText . "\n"; exit; } // Provide the RSA private key for decryption. $jwe2->SetPrivateKey(0,$rsaPrivKey); // Decrypt. $originalPlaintext = $jwe2->decrypt(0,'utf-8'); if ($jwe2->LastMethodSuccess != 1) { print $jwe2->LastErrorText . "\n"; exit; } print $originalPlaintext . "\n"; ?> |
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