PHP Requires Chilkat v11.0.0+

Signing HTTP Messages

See more RSA Examples

Demonstrates how to sign HTTP messages per draft-cavage-http-signatures-10 Chilkat2 PHP

<?php

use Chilkat2\DateTime;
use Chilkat2\PrivateKey;
use Chilkat2\PublicKey;
use Chilkat2\Rsa;
use Chilkat2\StringBuilder;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$bCrlf = true;
$sbPublicKeyPem = new StringBuilder();
$sbPublicKeyPem->AppendLine('-----BEGIN PUBLIC KEY-----', $bCrlf);
$sbPublicKeyPem->AppendLine('MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDCFENGw33yGihy92pDjZQhl0C3', $bCrlf);
$sbPublicKeyPem->AppendLine('6rPJj+CvfSC8+q28hxA161QFNUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6', $bCrlf);
$sbPublicKeyPem->AppendLine('Z4UMR7EOcpfdUE9Hf3m/hs+FUR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJw', $bCrlf);
$sbPublicKeyPem->AppendLine('oYi+1hqp1fIekaxsyQIDAQAB', $bCrlf);
$sbPublicKeyPem->AppendLine('-----END PUBLIC KEY-----', $bCrlf);

$pubKey = new PublicKey();
$pubKey->LoadFromString($sbPublicKeyPem->GetAsString());

$sbPrivateKeyPem = new StringBuilder();
$sbPrivateKeyPem->AppendLine('-----BEGIN RSA PRIVATE KEY-----', $bCrlf);
$sbPrivateKeyPem->AppendLine('MIICXgIBAAKBgQDCFENGw33yGihy92pDjZQhl0C36rPJj+CvfSC8+q28hxA161QF', $bCrlf);
$sbPrivateKeyPem->AppendLine('NUd13wuCTUcq0Qd2qsBe/2hFyc2DCJJg0h1L78+6Z4UMR7EOcpfdUE9Hf3m/hs+F', $bCrlf);
$sbPrivateKeyPem->AppendLine('UR45uBJeDK1HSFHD8bHKD6kv8FPGfJTotc+2xjJwoYi+1hqp1fIekaxsyQIDAQAB', $bCrlf);
$sbPrivateKeyPem->AppendLine('AoGBAJR8ZkCUvx5kzv+utdl7T5MnordT1TvoXXJGXK7ZZ+UuvMNUCdN2QPc4sBiA', $bCrlf);
$sbPrivateKeyPem->AppendLine('QWvLw1cSKt5DsKZ8UETpYPy8pPYnnDEz2dDYiaew9+xEpubyeW2oH4Zx71wqBtOK', $bCrlf);
$sbPrivateKeyPem->AppendLine('kqwrXa/pzdpiucRRjk6vE6YY7EBBs/g7uanVpGibOVAEsqH1AkEA7DkjVH28WDUg', $bCrlf);
$sbPrivateKeyPem->AppendLine('f1nqvfn2Kj6CT7nIcE3jGJsZZ7zlZmBmHFDONMLUrXR/Zm3pR5m0tCmBqa5RK95u', $bCrlf);
$sbPrivateKeyPem->AppendLine('412jt1dPIwJBANJT3v8pnkth48bQo/fKel6uEYyboRtA5/uHuHkZ6FQF7OUkGogc', $bCrlf);
$sbPrivateKeyPem->AppendLine('mSJluOdc5t6hI1VsLn0QZEjQZMEOWr+wKSMCQQCC4kXJEsHAve77oP6HtG/IiEn7', $bCrlf);
$sbPrivateKeyPem->AppendLine('kpyUXRNvFsDE0czpJJBvL/aRFUJxuRK91jhjC68sA7NsKMGg5OXb5I5Jj36xAkEA', $bCrlf);
$sbPrivateKeyPem->AppendLine('gIT7aFOYBFwGgQAQkWNKLvySgKbAZRTeLBacpHMuQdl1DfdntvAyqpAZ0lY0RKmW', $bCrlf);
$sbPrivateKeyPem->AppendLine('G6aFKaqQfOXKCyWoUiVknQJAXrlgySFci/2ueKlIE1QqIiLSZ8V8OlpFLRnb1pzI', $bCrlf);
$sbPrivateKeyPem->AppendLine('7U1yQXnTAEFYM560yJlzUpOb1V4cScGd365tiSMvxLOvTA==', $bCrlf);
$sbPrivateKeyPem->AppendLine('-----END RSA PRIVATE KEY-----', $bCrlf);

$privKey = new PrivateKey();
$privKey->LoadPem($sbPrivateKeyPem->GetAsString());

//    All examples use this request:
//
//    POST /foo?param=value&pet=dog HTTP/1.1
//    Host: example.com
//    Date: Sun, 05 Jan 2014 21:31:40 GMT
//    Content-Type: application/json
//    Digest: SHA-256=X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=
//    Content-Length: 18
//
//    {"hello": "world"}

// C.1.  Default Test
//
//    If a list of headers is not included, the date is the only header
//    that is signed by default.  The string to sign would be:
//
//    date: Sun, 05 Jan 2014 21:31:40 GMT
//
//    The Authorization header would be:
//
//    Authorization: Signature keyId="Test",algorithm="rsa-sha256",
//    signature="SjWJWbWN7i0wzBvtPl8rbASWz5xQW6mcJmn+ibttBqtifLN7Sazz
//    6m79cNfwwb8DMJ5cou1s7uEGKKCs+FLEEaDV5lp7q25WqS+lavg7T8hc0GppauB
//    6hbgEKTwblDHYGEtbGmtdHgVCk9SuS13F0hZ8FD0k/5OxEPXe5WozsbM="
//
//    The Signature header would be:
//
//    Signature: keyId="Test",algorithm="rsa-sha256",
//    signature="SjWJWbWN7i0wzBvtPl8rbASWz5xQW6mcJmn+ibttBqtifLN7Sazz
//    6m79cNfwwb8DMJ5cou1s7uEGKKCs+FLEEaDV5lp7q25WqS+lavg7T8hc0GppauB
//    6hbgEKTwblDHYGEtbGmtdHgVCk9SuS13F0hZ8FD0k/5OxEPXe5WozsbM="
//

$dtNow = new DateTime();
$dtNow->SetFromCurrentSystemTime();
$dateStr = $dtNow->GetAsRfc822(false);

// To duplicate the above result, we'll hard-code the date string.
$dateStr = 'Sun, 05 Jan 2014 21:31:40 GMT';

$rsa = new Rsa();
try {
    $rsa->UsePrivateKey($privKey);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

$sbStringToSign = new StringBuilder();
$sbStringToSign->Append('date: ');
$sbStringToSign->Append($dateStr);

$rsa->EncodingMode = 'base64';
$b64Signature = $rsa->SignStringENC($sbStringToSign->GetAsString(), 'SHA256');
echo $b64Signature, "\n";
echo "---------------------------\n";

// The result should be:
// SjWJWbWN7i0wzBvtPl8rbASW ... FD0k/5OxEPXe5WozsbM=

// ----------------------------------------------------------------------------------------------------

// C.2.  Basic Test
//
//    The minimum recommended data to sign is the (request-target), host,
//    and date.  In this case, the string to sign would be:
//
//    (request-target): post /foo?param=value&pet=dog
//    host: example.com
//    date: Sun, 05 Jan 2014 21:31:40 GMT
//
//    The Authorization header would be:
//
//    Authorization: Signature keyId="Test",algorithm="rsa-sha256",
//    headers="(request-target) host date", signature="qdx+H7PHHDZgy4
//    y/Ahn9Tny9V3GP6YgBPyUXMmoxWtLbHpUnXS2mg2+SbrQDMCJypxBLSPQR2aAjn
//    7ndmw2iicw3HMbe8VfEdKFYRqzic+efkb3nndiv/x1xSHDJWeSWkx3ButlYSuBs
//    kLu6kd9Fswtemr3lgdDEmn04swr2Os0="

$sbStringToSign->Clear();
$sbStringToSign->Append('(request-target): ');
$sbStringToSign->AppendLine('post /foo?param=value&pet=dog', false);
$sbStringToSign->Append('host: ');
$sbStringToSign->AppendLine('example.com', false);
$sbStringToSign->Append('date: ');
$sbStringToSign->Append($dateStr);

echo "StringToSign:\n";
echo $sbStringToSign->GetAsString(), "\n";
$b64Signature = $rsa->SignStringENC($sbStringToSign->GetAsString(), 'SHA256');
echo $b64Signature, "\n";
echo "---------------------------\n";

// The result should be:
// qdx+H7PHHDZgy4y/Ahn ... mn04swr2Os0=