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<?php
/*
* COAUTHOR: Samuel Muñoz Hidalgo
* EMAIL: samuel.mh@gmail.com
* LAST REVISION: 13-FEB-09
* DESCRIPTION: Things the STS can do
* - InfoCard issue
* - Error response (if the user send us wrong credentials)
* - Request Security Token Response
*/
class sspmod_InfoCard_STS {
/*
* USED IN: www/getcardform.php
* INPUT: data and configuration
* OUTPUT; a custom error message for the identity selector
*/
static public function createCard($ICdata,$ICconfig) {
$infocardbuf = '<Object Id="IC01" xmlns="http://www.w3.org/2000/09/xmldsig#">';
$infocardbuf .= '<InformationCard xml:lang="en-us" xmlns="http://schemas.xmlsoap.org/ws/2005/05/identity" xmlns:wsa="http://www.w3.org/2005/08/addressing" xmlns:wst="http://schemas.xmlsoap.org/ws/2005/02/trust" xmlns:wsx="http://schemas.xmlsoap.org/ws/2004/09/mex">';
//cardId
$infocardbuf .= '<InformationCardReference>';
$infocardbuf .= '<CardId>'.$ICdata['CardId'].'</CardId>'; //xs:anyURI cardId (="$cardurl/$ppid"; $ppid = "$uname-" . time();)
$infocardbuf .= '<CardVersion>1</CardVersion>'; //xs:unsignedInt
$infocardbuf .= '</InformationCardReference>';
//cardName
$infocardbuf .= '<CardName>'.$ICdata['CardName'].'</CardName>';
//image
$infocardbuf .= '<CardImage MimeType="'.mime_content_type($ICdata['CardImage']).'">';
$infocardbuf .= base64_encode(file_get_contents($ICdata['CardImage']));
$infocardbuf .= '</CardImage>';
//issuer - times
$infocardbuf .= '<Issuer>'.$ICconfig['InfoCard']['issuer'].'</Issuer>';
$infocardbuf .= '<TimeIssued>'.gmdate('Y-m-d').'T'.gmdate('H:i:s').'Z'.'</TimeIssued>';
$infocardbuf .= '<TimeExpires>'.$ICdata['TimeExpires'].'</TimeExpires>';
//Token Service List
$infocardbuf .= '<TokenServiceList>';
$infocardbuf .= '<TokenService>';
$infocardbuf .= '<wsa:EndpointReference>';
$infocardbuf .= '<wsa:Address>'.$ICconfig['tokenserviceurl'].'</wsa:Address>';
$infocardbuf .= '<wsa:Metadata>';
$infocardbuf .= '<wsx:Metadata>';
$infocardbuf .= '<wsx:MetadataSection>';
$infocardbuf .= '<wsx:MetadataReference>';
$infocardbuf .= '<wsa:Address>'.$ICconfig['mexurl'].'</wsa:Address>';
$infocardbuf .= '</wsx:MetadataReference>';
$infocardbuf .= '</wsx:MetadataSection>';
$infocardbuf .= '</wsx:Metadata>';
$infocardbuf .= '</wsa:Metadata>';
$infocardbuf .= '</wsa:EndpointReference>';
/*Types of User Credentials
* Supported: UsernamePasswordCredential, SelfIssuedCredential
* Unsupported: KerberosV5Credential, X509V3Credential
*/
$infocardbuf .= '<UserCredential>';
$infocardbuf .= '<DisplayCredentialHint>'.$ICdata['DisplayCredentialHint'].'</DisplayCredentialHint>';
switch($ICconfig['UserCredential']){
case 'UsernamePasswordCredential':
$infocardbuf .= '<UsernamePasswordCredential>';
$infocardbuf .= '<Username>'.$ICdata['UserName'].'</Username>';
$infocardbuf .= '</UsernamePasswordCredential>';
break;
case 'KerberosV5Credential':
$infocardbuf .= '<KerberosV5Credential/>';
break;
case 'X509V3Credential':
$infocardbuf .= '<X509V3Credential>';
$infocardbuf .= '<ds:X509Data>';
$infocardbuf .= '<wsse:KeyIdentifier ValueType="http://docs.oasis-open.org/wss/2004/xx/oasis-2004xx-wss-soap-message-security-1.1#ThumbprintSHA1" EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis200401-wss-soap-message-security-1.0#Base64Binary">';
/*This element provides a key identifier for the X.509 certificate based on the SHA1 hash
of the entire certificate content expressed as a “thumbprint.” Note that the extensibility
point in the ds:X509Data element is used to add wsse:KeyIdentifier as a child
element.*/
$infocardbuf .= $ICdata['KeyIdentifier']; //xs:base64binary;
$infocardbuf .= '</wsse:KeyIdentifier>';
$infocardbuf .= '</ds:X509Data>';
$infocardbuf .= '</X509V3Credential>';
break;
case 'SelfIssuedCredential':
$infocardbuf .= '<SelfIssuedCredential>';
$infocardbuf .= '<PrivatePersonalIdentifier>';
$infocardbuf .= $ICdata['PPID']; //xs:base64binary;
$infocardbuf .= '</PrivatePersonalIdentifier>';
$infocardbuf .= '</SelfIssuedCredential> ';
break;
default:
break;
}
$infocardbuf .= '</UserCredential>';
$infocardbuf .= '</TokenService>';
$infocardbuf .= '</TokenServiceList>';
//Tokentype
$infocardbuf .= '<SupportedTokenTypeList>';
$infocardbuf .= '<wst:TokenType>urn:oasis:names:tc:SAML:1.0:assertion</wst:TokenType>';
$infocardbuf .= '</SupportedTokenTypeList>';
//Claims
$infocardbuf .= '<SupportedClaimTypeList>';
$url = $ICconfig['InfoCard']['schema'].'/claims/';
foreach ($ICconfig['InfoCard']['requiredClaims'] as $claim=>$data) {
$infocardbuf .= '<SupportedClaimType Uri="'.$url.$claim.'">';
$infocardbuf .= '<DisplayTag>'.$data['displayTag'].'</DisplayTag>';
$infocardbuf .= '<Description>'.$data['description'].'</Description>';
$infocardbuf .= '</SupportedClaimType>';
}
foreach ($ICconfig['InfoCard']['optionalClaims'] as $claim=>$data) {
$infocardbuf .= '<SupportedClaimType Uri="'.$url.$claim.'">';
$infocardbuf .= '<DisplayTag>'.$data['displayTag'].'</DisplayTag>';
$infocardbuf .= '<Description>'.$data['description'].'</Description>';
$infocardbuf .= '</SupportedClaimType>';
}
$infocardbuf .= '</SupportedClaimTypeList>';
//Privacy URL
$infocardbuf .= '<PrivacyNotice>'.$ICconfig['InfoCard']['privacyURL'].'</PrivacyNotice>';
$infocardbuf .= '</InformationCard>';
$infocardbuf .= '</Object>';
$canonicalbuf = sspmod_InfoCard_Utils::canonicalize($infocardbuf);
//construct a SignedInfo block
$signedinfo = '<SignedInfo xmlns="http://www.w3.org/2000/09/xmldsig#">';
$signedinfo .= '<CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>';
$signedinfo .= '<SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>';
$signedinfo .= '<Reference URI="#IC01">';
$signedinfo .= '<Transforms>';
$signedinfo .= '<Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>';
$signedinfo .= '</Transforms>';
$signedinfo .= '<DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>';
$signedinfo .= '<DigestValue>'.base64_encode(sha1($canonicalbuf, TRUE)).'</DigestValue>';
$signedinfo .= '</Reference>';
$signedinfo .= '</SignedInfo>';
$canonicalbuf = sspmod_InfoCard_Utils::canonicalize($signedinfo);
$signature = '';
$privkey = openssl_pkey_get_private(file_get_contents($ICconfig['sts_key']));
openssl_sign($canonicalbuf, $signature, $privkey);
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openssl_free_key($privkey);
$infocard_signature = base64_encode($signature);
//Envelope
$buf = '<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">';
$buf .= $signedinfo;
$buf .= '<SignatureValue>'.$infocard_signature.'</SignatureValue>';
$buf .= '<KeyInfo>';
$buf .= '<X509Data>';
// signing certificate(s)
foreach ($ICconfig['certificates'] as $idx=>$cert)
$buf .= '<X509Certificate>'.sspmod_InfoCard_Utils::takeCert($cert).'</X509Certificate>';
$buf .= '</X509Data>';
$buf .= '</KeyInfo>';
$buf .= $infocardbuf;
$buf .= '</Signature>';
return $buf;
}
/*
* USED IN: www/tokenservice.php
* INPUT: error message, uuid of the RST
* OUTPUT; a custom error message for the identity selector
*/
static public function errorMessage($msg,$relatesto){
$buf = '<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">';
$buf .= '<s:Header>';
$buf .= '<a:Action s:mustUnderstand="1">http://www.w3.org/2005/08/addressing/soap/fault</a:Action>';
$buf .= '<a:RelatesTo>'.$relatesto.'</a:RelatesTo>';
$buf .= '</s:Header>';
$buf .= '<s:Body>';
$buf .= '<s:Fault>';
$buf .= '<s:Code>';
$buf .= '<s:Value xmlns:a="http://www.w3.org/2003/05/soap-envelope">';
$buf .= 'a:Sender';
$buf .= '</s:Value>';
$buf .= '<s:Subcode>';
$buf .= '<s:Value xmlns:a="http://schemas.xmlsoap.org/ws/2005/05/identity">';
$buf .= 'a:MissingAppliesTo';
$buf .= '</s:Value>';
$buf .= '</s:Subcode>';
$buf .= '</s:Code>';
$buf .= '<s:Reason>';
$buf .= '<s:Text xml:lang="en">';
$buf .= $msg;
$buf .= '</s:Text>';
$buf .= '</s:Reason>';
$buf .= '</s:Fault>';
$buf .= '</s:Body>';
$buf .= '</s:Envelope>';
return $buf;
}
/*
* USED IN: www/tokenservice.php
* INPUT: claims value, configuration, uuid of the RST
* OUTPUT; a security token for the identity selector
*/
static public function createToken($claimValues,$config,$relatesto){
$assertionid = uniqid('uuid-');
$created = gmdate('Y-m-d').'T'.gmdate('H:i:s').'Z';
$expires = gmdate('Y-m-d', time()+3600).'T'.gmdate('H:i:s', time()+3600).'Z';
//SOAP ENVELOPE
$env = '<?xml version="1.0"?>';
$env .= '<S:Envelope xmlns:S="http://www.w3.org/2003/05/soap-envelope" xmlns:wsa="http://www.w3.org/2005/08/addressing" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:ic="http://schemas.xmlsoap.org/ws/2005/05/identity" xmlns:wst="http://schemas.xmlsoap.org/ws/2005/02/trust" xmlns:xenc="http://www.w3.org/2001/04/xmlenc" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">';
$env .= '<S:Header>';
$env .= '<wsa:Action wsu:Id="_1">';
$env .= 'http://schemas.xmlsoap.org/ws/2005/02/trust/RSTR/Issue';
$env .= '</wsa:Action>';
$env .= '<wsa:RelatesTo wsu:Id="_2">';
$env .= $relatesto;
$env .= '</wsa:RelatesTo>';
$env .= '<wsa:To wsu:id="_3">';
$env .= 'http://www.w3.org/2005/08/addressing/anonymous';
$env .= '</wsa:To>';
$env .= '<wsse:Security S:mustUnderstand="1">';
$env .= '<wsu:Timestamp wsu:Id="_6">';
$env .= '<wsu:Created>'.$created.'</wsu:Created>';
$env .= '<wsu:Expires>'.$expires.'</wsu:Expires>';
$env .= '</wsu:Timestamp>';
$env .= '</wsse:Security>';
$env .= '</S:Header>';
$env .= '<S:Body wsu:Id="_10">';
//RequestSecurityTokenResponse
$env .= sspmod_InfoCard_STS::RequestSecurityTokenResponse($claimValues,$config,$assertionid,$created,$expires);
$env .= '</S:Body>';
$env .= '</S:Envelope>';
return $env;
}
/*
* USED IN: createToken
* INPUT: claims value, configuration, uuid, times
* OUTPUT; returns the <wst:RequestSecurityTokenResponse>' of the RSTR
*/
static private function RequestSecurityTokenResponse ($claimValues,$config,$assertionid,$created,$expires){
$tr = '<wst:RequestSecurityTokenResponse>';
$tr .= '<wst:TokenType>urn:oasis:names:tc:SAML:1.0:assertion</wst:TokenType>';
$tr .= '<wst:LifeTime>';
$tr .= '<wsu:Created>'.$created.'</wsu:Created>';
$tr .= '<wsu:Expires>'.$expires.'</wsu:Expires>';
$tr .= '</wst:LifeTime>';
//Encrypted token: SAML assertion
$tr .= '<wst:RequestedSecurityToken>';
$tr .= sspmod_InfoCard_STS::saml_assertion($claimValues,$config,$assertionid,$created,$expires);
$tr .= '</wst:RequestedSecurityToken>';
//RequestedAattachedReference
$tr .= '<wst:RequestedAttachedReference>';
$tr .= '<wsse:SecurityTokenReference>';
$tr .= '<wsse:KeyIdentifier ValueType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.0#SAMLAssertionID">';
$tr .= $assertionid;
$tr .= '</wsse:KeyIdentifier>';
$tr .= '</wsse:SecurityTokenReference>';
$tr .= '</wst:RequestedAttachedReference>';
//RequestedUnattachedReference
$tr .= '<wst:RequestedUnattachedReference>';
$tr .= '<wsse:SecurityTokenReference>';
$tr .= '<wsse:KeyIdentifier ValueType="http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.0#SAMLAssertionID">';
$tr .= $assertionid;
$tr .= '</wsse:KeyIdentifier>';
$tr .= '</wsse:SecurityTokenReference>';
$tr .= '</wst:RequestedUnattachedReference>';
//RequestedDisplayToken
$tr .= '<ic:RequestedDisplayToken>';
$tr .= '<ic:DisplayToken xml:lang="en-us">';
foreach ($claimValues as $claim=>$data) {
$tr .= '<ic:DisplayClaim Uri="'.$config['InfoCard']['schema'].'/claims/'.$claim.'">';
$tr .= '<ic:DisplayTag>'.$data['displayTag'].'</ic:DisplayTag>';
$tr .= '<ic:DisplayValue>'.$data['value'].'</ic:DisplayValue>';
$tr .= "</ic:DisplayClaim>";
}
$tr .= '</ic:DisplayToken>';
$tr .= '</ic:RequestedDisplayToken>';
$tr .= '</wst:RequestSecurityTokenResponse>';
return $tr;
}
/*
* USED IN: RequestSecurityTokenResponse
* INPUT: claims value, configuration, uuid, times
* OUTPUT; STS Signed SAML assertion
*/
static private function saml_assertion($claimValues,$config,$assertionid,$created,$expires){
$saml = '<saml:Assertion MajorVersion="1" MinorVersion="0" AssertionID="'.$assertionid.'" Issuer="'.$config['issuer'].'" IssueInstant="'.$created.'" xmlns:saml="urn:oasis:names:tc:SAML:1.0:assertion">';
$saml .= '<saml:Conditions NotBefore="'.$created.'" NotOnOrAfter="'.$expires.'" />';
$saml .= '<saml:AttributeStatement>';
$saml .= '<saml:Subject>';
$saml .= '<saml:SubjectConfirmation>';
$saml .= '<saml:ConfirmationMethod>urn:oasis:names:tc:SAML:1.0:cm:holder-of-key</saml:ConfirmationMethod>';
// proof key
$saml .= '<dsig:KeyInfo xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">';
$saml .= '<dsig:X509Data>';
$saml .= '<dsig:X509Certificate>'.sspmod_InfoCard_Utils::takeCert($config['sts_crt']).'</dsig:X509Certificate>';
$saml .= '</dsig:X509Data>';
$saml .= '</dsig:KeyInfo>';
$saml .= '</saml:SubjectConfirmation>';
$saml .= '</saml:Subject>';
foreach ($claimValues as $claim=>$data) {
$saml .= '<saml:Attribute AttributeName="'.$claim.'" AttributeNamespace="'.$config['InfoCard']['schema'].'/claims">';
$saml .= '<saml:AttributeValue>'.$data['value'].'</saml:AttributeValue>';
$saml .= '</saml:Attribute>';
}
$saml .= '</saml:AttributeStatement>';
//Pure SAML Assertion digest
$canonicalbuf = sspmod_InfoCard_Utils::canonicalize($saml.'</saml:Assertion>');
$myhash = sha1($canonicalbuf,TRUE);
$samldigest = base64_encode($myhash);
//Digest block
$signedinfo = '<dsig:SignedInfo xmlns:dsig="http://www.w3.org/2000/09/xmldsig#" >';
$signedinfo .= '<dsig:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />';
$signedinfo .= '<dsig:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />';
$signedinfo .= '<dsig:Reference URI="#'.$assertionid.'">';
$signedinfo .= '<dsig:Transforms>';
$signedinfo .= '<dsig:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />';
$signedinfo .= '<dsig:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" />';
$signedinfo .= '</dsig:Transforms>';
$signedinfo .= '<dsig:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />';
$signedinfo .= '<dsig:DigestValue>'.$samldigest.'</dsig:DigestValue>';
$signedinfo .= '</dsig:Reference>';
$signedinfo .= '</dsig:SignedInfo>';
//Signature of the digest
$canonicalbuf = sspmod_InfoCard_Utils::canonicalize($signedinfo);
$privkey = openssl_pkey_get_private(file_get_contents($config['sts_key']));
$signature = '';
openssl_sign($canonicalbuf, $signature, $privkey);
openssl_free_key($privkey);
$samlsignature = base64_encode($signature);
//Signature block
$saml .= '<dsig:Signature xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">';
$saml .= $signedinfo;
$saml .= '<dsig:SignatureValue>'.$samlsignature.'</dsig:SignatureValue>';
$saml .= '<dsig:KeyInfo>';
$saml .= '<dsig:X509Data>';
$saml .= '<dsig:X509Certificate>'.sspmod_InfoCard_Utils::takeCert($config['sts_crt']).'</dsig:X509Certificate>';
$saml .= '</dsig:X509Data>';
$saml .= '</dsig:KeyInfo>';
$saml .= '</dsig:Signature>';
$saml .= '</saml:Assertion>';
return $saml;
}
}