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<?php
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2
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namespace Kendox;
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3
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4
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use Exception;
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5
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6
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class TokenGenerator
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7
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{
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8
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9
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/**
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10
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* Token version
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* @var string
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12
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*/
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13
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private $TokenVersion = "1";
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14
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15
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/**
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16
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* Token lifetime in seconds
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* @var int
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18
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*/
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19
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private $TokenLifeTime = 99000000;
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20
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21
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/**
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* Certificate data (read from PFX-File)
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23
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* @var string
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24
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*/
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private $Certificate = null;
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27
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/**
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* Private key of certificate (read from PFX-file)
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* @var string
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30
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*/
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private $CertPrivateKey = null;
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/** |
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* @param string $issuer |
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* @param string $pfxFile |
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36
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* @param string $pfxPassword |
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*/ |
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function __construct(/** |
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* Issuer host name |
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*/ |
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private $Issuer, /** |
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* Full filename of PFX-File (Certificate) |
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*/ |
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private $PfxFile, /** |
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* Password for PFX-File (Certificate) |
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*/ |
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private $PfxPassword)
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48
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{
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49
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$this->loadCertificateFromPfx();
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}
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51
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52
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/**
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* Token generation
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54
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*
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55
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* @param string $userEMail The e-mail of the user to generate a token
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56
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*
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57
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* @return string Token in XML format
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58
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*/
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59
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public function generateToken($userEMail)
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60
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{
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61
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try {
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$now = new \DateTime("now", new \DateTimeZone("utc"));
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63
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$guid = $this->createGUID();
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64
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$writerSignedInfo = xmlwriter_open_memory();
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$this->writeSignedInfo($writerSignedInfo, $userEMail, $now, $guid);
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66
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$signedInfo = xmlwriter_output_memory($writerSignedInfo);
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67
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$writer = xmlwriter_open_memory();
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68
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xmlwriter_set_indent($writer, false);
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xmlwriter_start_element($writer, "InfoShareToken");
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$this->writeSignedInfo($writer, $userEMail, $now, $guid);
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xmlwriter_start_element($writer, "SignatureValue");
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xmlwriter_text($writer, $this->signXmlString($signedInfo));
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xmlwriter_end_element($writer);
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xmlwriter_end_element($writer);
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return xmlwriter_output_memory($writer);
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76
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} catch(\Exception $ex) {
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77
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throw new \Exception("Generating token failed: ".$ex->getMessage());
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78
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}
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79
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}
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80
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81
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/**
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82
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* Loads the X509-certificate from PFX-File
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83
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*/
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84
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private function loadCertificateFromPfx()
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85
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{
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86
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if ($this->PfxFile == null) throw new \Exception("No PFX-File available.");
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87
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if (!file_exists($this->PfxFile)) throw new \Exception("PFX-File not found.");
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88
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if (empty($this->PfxPassword)) throw new \Exception("Password not set for PFX-File.");
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89
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$pfxContent = file_get_contents($this->PfxFile);
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90
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$results = [];
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91
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$read = openssl_pkcs12_read($pfxContent, $results, $this->PfxPassword);
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92
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if ($read == false) throw new \Exception("Error on reading PFX-File: ".openssl_error_string());
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93
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$this->Certificate = $results['pkey'].$results['cert'];
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94
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$this->CertPrivateKey = $results['pkey'];
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95
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}
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96
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97
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private function writeSignedInfo($writer, $userEMail, $time, $uniqueId)
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98
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{
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99
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$utcTime = $time->format('Y-m-d H:i:s');
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$utcTime = str_replace(" ", "T", $utcTime)."Z";
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xmlwriter_start_element($writer, "SignedInfo");
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102
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xmlwriter_start_element($writer, "UserPrincipalName");
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103
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xmlwriter_text($writer, $userEMail);
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104
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xmlwriter_end_element($writer);
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105
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xmlwriter_start_element($writer, "UniqueId");
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106
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xmlwriter_text($writer, $uniqueId);
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107
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xmlwriter_end_element($writer);
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108
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xmlwriter_start_element($writer, "Version");
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109
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xmlwriter_text($writer, $this->TokenVersion);
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110
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xmlwriter_end_element($writer);
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111
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xmlwriter_start_element($writer, "TimeStampUTC");
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112
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xmlwriter_text($writer, $utcTime);
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113
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xmlwriter_end_element($writer);
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114
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xmlwriter_start_element($writer, "LifeTimeSeconds");
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115
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xmlwriter_text($writer, $this->TokenLifeTime);
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xmlwriter_end_element($writer);
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117
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xmlwriter_start_element($writer, "IssueServer");
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118
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xmlwriter_text($writer, $this->Issuer);
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xmlwriter_end_element($writer);
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120
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xmlwriter_start_element($writer, "CertificateFingerprint");
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121
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xmlwriter_text($writer, strtoupper(openssl_x509_fingerprint($this->Certificate)));
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122
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xmlwriter_end_element($writer);
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123
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xmlwriter_start_element($writer, "HashAlgorithm");
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xmlwriter_text($writer, "SHA512");
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125
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xmlwriter_end_element($writer);
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126
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xmlwriter_start_element($writer, "Attributes");
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127
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xmlwriter_text($writer, "");
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128
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xmlwriter_end_element($writer);
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129
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xmlwriter_end_element($writer);
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130
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}
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131
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132
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/**
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133
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* Signing a XML-String and returns the result
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134
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*
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135
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* @param string $xml XML-String
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136
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*
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137
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* @return string
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138
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*/
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139
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function SignXmlString($signedInfoXml)
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140
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{
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141
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try {
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142
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$data = iconv('utf-8', 'utf-16le', $signedInfoXml);
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143
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$privateKey = \phpseclib3\Crypt\RSA::loadFormat('PKCS8', $this->CertPrivateKey)
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144
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->withPadding(\phpseclib3\Crypt\RSA::SIGNATURE_PKCS1)
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145
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->withHash('sha512');
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146
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$base64 = base64_encode($privateKey->sign($data));
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147
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return $base64;
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148
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} catch (\Exception $ex) {
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149
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throw new \Exception("XML signing failed: ".$ex->getMessage());
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150
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}
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151
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}
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152
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153
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/**
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154
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* Creates a unique ID
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155
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* @return string
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156
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*/
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157
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private function createGUID(){
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158
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if (function_exists('com_create_guid')){
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159
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return com_create_guid();
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160
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}
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161
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else {
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162
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mt_srand((double)microtime()*10000);
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163
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$charid = strtoupper(md5(uniqid(random_int(0, mt_getrandmax()), true)));
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164
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$hyphen = chr(45);// "-"
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165
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$uuid = substr($charid, 0, 8).$hyphen
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166
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.substr($charid, 8, 4).$hyphen
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167
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.substr($charid,12, 4).$hyphen
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168
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.substr($charid,16, 4).$hyphen
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169
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.substr($charid,20,12);
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170
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return $uuid;
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171
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}
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172
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}
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173
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174
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}
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175
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176
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?> |
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grommunio /
grommunio-web
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