[pmg-devel] [PATCH pmg-api v8 4/13] config: add oidc type authentication realm

[Markus Frank]

PMG::Auth::OIDC is based on pve-access-control's PVE::Auth::OpenId and
adds an autocreate-role option. If the autocreate option is enabled, the
user is automatically created with the Audit role. With autocreate-role
this role can be changed.

Signed-off-by: Markus Frank <m.frank at proxmox.com>
---
v8:
* added defaults for autocreate-role and username-claim

 src/Makefile             |   1 +
 src/PMG/AccessControl.pm |   2 +
 src/PMG/Auth/OIDC.pm     | 103 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 106 insertions(+)
 create mode 100755 src/PMG/Auth/OIDC.pm

diff --git a/src/Makefile b/src/Makefile
index 659a666..3cae7c7 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -169,6 +169,7 @@ LIBSOURCES =				\
 	PMG/Auth/Plugin.pm		\
 	PMG/Auth/PAM.pm			\
 	PMG/Auth/PMG.pm			\
+	PMG/Auth/OIDC.pm		\
 
 SOURCES = ${LIBSOURCES} ${CLI_BINARIES} ${TEMPLATES_FILES} ${CONF_MANS} ${CLI_MANS} ${SERVICE_MANS} ${SERVICE_UNITS} ${TIMER_UNITS} pmg-sources.list pmg-initramfs.conf
 
diff --git a/src/PMG/AccessControl.pm b/src/PMG/AccessControl.pm
index 78105c0..57d80f8 100644
--- a/src/PMG/AccessControl.pm
+++ b/src/PMG/AccessControl.pm
@@ -15,9 +15,11 @@ use PMG::LDAPSet;
 use PMG::TFAConfig;
 
 use PMG::Auth::Plugin;
+use PMG::Auth::OIDC;
 use PMG::Auth::PAM;
 use PMG::Auth::PMG;
 
+PMG::Auth::OIDC->register();
 PMG::Auth::PAM->register();
 PMG::Auth::PMG->register();
 PMG::Auth::Plugin->init();
diff --git a/src/PMG/Auth/OIDC.pm b/src/PMG/Auth/OIDC.pm
new file mode 100755
index 0000000..4129d47
--- /dev/null
+++ b/src/PMG/Auth/OIDC.pm
@@ -0,0 +1,103 @@
+package PMG::Auth::OIDC;
+
+use strict;
+use warnings;
+
+use PVE::Tools;
+use PMG::Auth::Plugin;
+
+use base qw(PMG::Auth::Plugin);
+
+sub type {
+    return 'oidc';
+}
+
+sub properties {
+    return {
+	'issuer-url' => {
+	    description => "OpenID Connect Issuer Url",
+	    type => 'string',
+	    maxLength => 256,
+	    pattern => qr/^(https?):\/\/([a-zA-Z0-9.-]+)(:[0-9]{1,5})?(\/[^\s]*)?$/,
+	},
+	'client-id' => {
+	    description => "OpenID Connect Client ID",
+	    type => 'string',
+	    maxLength => 256,
+	    pattern => qr/^[a-zA-Z0-9._:-]+$/,
+	},
+	'client-key' => {
+	    description => "OpenID Connect Client Key",
+	    type => 'string',
+	    optional => 1,
+	    maxLength => 256,
+	    pattern => qr/^[a-zA-Z0-9._:-]+$/,
+	},
+	autocreate => {
+	    description => "Automatically create users if they do not exist.",
+	    optional => 1,
+	    type => 'boolean',
+	    default => 0,
+	},
+	'autocreate-role' => {
+	    description => "Automatically create users with a specific role.",
+	    type => 'string',
+	    enum => ['admin', 'qmanager', 'audit', 'helpdesk'],
+	    default => 'audit',
+	    optional => 1,
+	},
+	'username-claim' => {
+	    description => "OpenID Connect claim used to generate the unique username.",
+	    type => 'string',
+	    optional => 1,
+	    default => 'sub',
+	    pattern => qr/^[a-zA-Z0-9._:-]+$/,
+	},
+	prompt => {
+	    description => "Specifies whether the Authorization Server prompts the End-User for"
+	        ." reauthentication and consent.",
+	    type => 'string',
+	    pattern => '(?:none|login|consent|select_account|\S+)', # \S+ is the extension variant
+	    optional => 1,
+	},
+	scopes => {
+	    description => "Specifies the scopes (user details) that should be authorized and"
+	        ." returned, for example 'email' or 'profile'.",
+	    type => 'string', # format => 'some-safe-id-list', # FIXME: TODO
+	    default => "email profile",
+	    pattern => qr/^[a-zA-Z0-9._:-]+$/,
+	    optional => 1,
+	},
+	'acr-values' => {
+	    description => "Specifies the Authentication Context Class Reference values that the"
+		."Authorization Server is being requested to use for the Auth Request.",
+	    type => 'string', # format => 'some-safe-id-list', # FIXME: TODO
+	    pattern => qr/^[a-zA-Z0-9._:-]+$/,
+	    optional => 1,
+	},
+   };
+}
+
+sub options {
+    return {
+	'issuer-url' => {},
+	'client-id' => {},
+	'client-key' => { optional => 1 },
+	autocreate => { optional => 1 },
+	'autocreate-role' => { optional => 1 },
+	'username-claim' => { optional => 1, fixed => 1 },
+	prompt => { optional => 1 },
+	scopes => { optional => 1 },
+	'acr-values' => { optional => 1 },
+	default => { optional => 1 },
+	comment => { optional => 1 },
+    };
+}
+
+sub authenticate_user {
+    my ($class, $config, $realm, $username, $password) = @_;
+
+    die "OpenID Connect realm does not allow password verification.\n";
+}
+
+1;
-- 
2.39.5