{"id":44531806,"url":"https://github.com/linkeddata/mod_authn_webid","last_synced_at":"2026-02-13T18:37:38.860Z","repository":{"id":1760331,"uuid":"2655376","full_name":"linkeddata/mod_authn_webid","owner":"linkeddata","description":"WebID authentication module for Apache 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returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2026-02-13T18:37:37.654Z","updated_at":"2026-02-13T18:37:38.851Z","avatar_url":"https://github.com/linkeddata.png","language":"C","funding_links":[],"categories":[],"sub_categories":[],"readme":"\u003ch2\u003eWebID FOAF+SSL authentication module for Apache 2\u003c/h2\u003e\n\n\u003cp\u003eThe latest version of this module can be found at:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003ehttp://dig.csail.mit.edu/2009/mod_authn_webid/\u003c/li\u003e\n\u003cli\u003ehttps://svn.csail.mit.edu/dig/2009/mod_authn_webid/\u003c/li\u003e\n\u003c/ul\u003e\n\n\u003cp\u003eVisit the W3 ESW wiki for more information about FOAF+SSL:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003ehttp://esw.w3.org/topic/foaf+ssl\u003c/li\u003e\n\u003c/ul\u003e\n\n\u003ch3\u003eRequirements\u003c/h3\u003e\n\n\u003cp\u003eRelease versions of the following packages for your Linux\ndistribution:\u003c/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eApache \u0026gt;=2.2\u003c/li\u003e\n\u003cli\u003emod_ssl\u003c/li\u003e\n\u003c/ul\u003e\n\n\u003cp\u003eDevelopment versions of the following packages for your Linux\ndistribution:\u003c/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eApache \u0026gt;=2.2 (httpd-devel)\u003c/li\u003e\n\u003cli\u003eRedland \u0026gt;=1.0.7 (redland-devel)\u003c/li\u003e\n\u003cli\u003eOpenSSL \u0026gt;=0.9.8g (openssl-devel)\u003c/li\u003e\n\u003c/ul\u003e\n\n\u003ch3\u003eInstalling\u003c/h3\u003e\n \n\u003cp\u003eUse the following compilation and installation procedure:\u003c/p\u003e\n\n\u003cpre\u003e\n$ autoconf\n$ ./configure\n$ sudo make install\n\u003c/pre\u003e\n\n\u003cp\u003eThe 'make install' command calls Apache's apxs utility to create and install\nthe mod_authn_webid DSO using default Apache module installation parameters.\u003c/p\u003e\n\n\u003ch3\u003eConfiguration Directives\u003c/h3\u003e\n\n\u003cdl\u003e\n\u003cdt\u003eAuthWebIDAuthoritative\u003c/dt\u003e\n\u003cdd\u003eSet to 'Off' to allow access control to be passed along to lower modules if\n  the WebID is not known to this module\u003c/dd\u003e\n\u003c/dl\u003e\n\n\u003ch3\u003eSample httpd.conf\u003c/h3\u003e\n\n\u003cpre\u003eLoadModule authn_webid_module modules/mod_authn_webid.so\n\nSSLVerifyClient optional_no_ca\n\n# WebID ignored\n\u0026lt;Location /\u0026gt;\n\u0026lt;/Location\u0026gt;\n\n# WebID optional\n\u0026lt;Location /public/\u0026gt;\n    AuthType WebID\n    Require everyone\n    AuthWebIDAuthoritative off\n\u0026lt;/Location\u0026gt;\n\n# WebID required\n\u0026lt;Location /private/\u0026gt;\n    AuthType WebID\n    Require valid-user\n\u0026lt;/Location\u0026gt;\n\u003c/pre\u003e\n\n\u003ch3\u003eAuthentication Details\u003c/h3\u003e\n\n\u003cp\u003eClients are verified using the following SPARQL query:\u003c/p\u003e\n\n\u003cpre\u003e\nPREFIX rdf: \u0026lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#\u0026gt;\nPREFIX cert: \u0026lt;http://www.w3.org/ns/auth/cert#\u0026gt;\nPREFIX rsa: \u0026lt;http://www.w3.org/ns/auth/rsa#\u0026gt;\nSELECT ?m ?e ?mod ?exp WHERE {\n    ?key cert:identity \u0026lt;%s\u0026gt;;\n         rsa:modulus ?m;\n         rsa:public_exponent ?e.\n    OPTIONAL { ?m cert:hex ?mod . }\n    OPTIONAL { ?e cert:decimal ?exp. }\n}\n\u003c/pre\u003e\n\n\u003cp\u003e%s is substituted by the client's WebID claim.\u003c/p\u003e\n\n\u003cp\u003eMatching modulus and exponent triggers successful authentication.\nOnly hex characters [0-9a-f] are considered for modulus comparison.\u003c/p\u003e\n\n\u003cp\u003eThe optional clauses maintain compatibility for users with FOAF WebIDs\nbefore the changes to the cert datatypes discussed on foaf-protocols here:\nhttp://lists.foaf-project.org/pipermail/foaf-protocols/2010-March/001857.html\u003c/p\u003e\n\n\u003ch3\u003eSupport\u003c/h3\u003e\n\n\u003cp\u003ePlease visit the \u003ca href=\"http://dig.xvm.mit.edu/redmine/projects/authn-webid\"\u003eissue tracker\u003c/a\u003e\nfor bug reports, feature requests, and other support.\u003c/p\u003e\n\n\u003ch3\u003eAuthor\u003c/h3\u003e\n\n\u003cp\u003eJoe Presbrey\u003cbr /\u003e\npresbrey@csail.mit.edu\u003c/p\u003e\n\n$Id: README 28777 2010-04-12 20:49:23Z presbrey 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