[pve-devel] [PATCH installer 7/7] proxinstall: use email regex from HTML specification for validation

[Christoph Heiss <c.heiss@proxmox.com>]

That regex should be a lot more accurate in what it allows - if it's
good enough for the HTML spec, it should be for us too.

Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>
---
 Proxmox/Makefile | 1 +
 Proxmox/Sys.pm   | 9 +++++++++
 proxinstall      | 3 ++-
 3 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 Proxmox/Sys.pm

diff --git a/Proxmox/Makefile b/Proxmox/Makefile
index 9561d9b..6f9eea8 100644
--- a/Proxmox/Makefile
+++ b/Proxmox/Makefile
@@ -12,6 +12,7 @@ PERL_MODULES=\
     Install/RunEnv.pm \
     Install/StorageConfig.pm \
     Log.pm \
+    Sys.pm \
     Sys/Block.pm \
     Sys/Command.pm \
     Sys/File.pm \
diff --git a/Proxmox/Sys.pm b/Proxmox/Sys.pm
new file mode 100644
index 0000000..afc6780
--- /dev/null
+++ b/Proxmox/Sys.pm
@@ -0,0 +1,9 @@
+package Proxmox::Sys;
+
+use strict;
+use warnings;
+
+# The HTML specification actually gives a "blessed" regex for email addresses:
+# https://html.spec.whatwg.org/multipage/input.html#valid-e-mail-address
+# Using that /should/ cover all possible cases that are encountered in the wild.
+our $EMAIL_RE = '^[a-zA-Z0-9.!#$%&\'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$';
diff --git a/proxinstall b/proxinstall
index a6a4cfb..79b0c76 100755
--- a/proxinstall
+++ b/proxinstall
@@ -33,6 +33,7 @@ my $iso_env = Proxmox::Install::ISOEnv::get();
 use Proxmox::Install;
 use Proxmox::Install::Config;
 
+use Proxmox::Sys;
 use Proxmox::Sys::Block qw(get_cached_disks);
 use Proxmox::Sys::Command qw(syscmd);
 use Proxmox::Sys::File qw(file_read_all file_write_all);
@@ -733,7 +734,7 @@ sub create_password_view {
 	}
 
 	my $t3 = $eme->get_text;
-	if ($t3 !~ m/^[\w\+\-\~]+(\.[\w\+\-\~]+)*@[a-zA-Z0-9\-]+(\.[a-zA-Z0-9\-]+)*$/) {
+	if ($t3 !~ m/$Proxmox::Sys::EMAIL_RE/) {
 	    Proxmox::UI::message("Email does not look like a valid address (user\@domain.tld)");
 	    $eme->grab_focus();
 	    return;
-- 
2.44.0



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