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authorMichael Tänzer <neo@nhng.de>2011-06-17 18:34:11 +0200
committerMichael Tänzer <neo@nhng.de>2011-06-17 18:34:11 +0200
commit9516e1d117d1dcf88db7ead53f950c66850c6fcb (patch)
tree12c677e0038b8f169831f84228c6e1a8f367c491 /scripts/mail-weak-keys.php
parent7c2327209cb81339d7e9a55d175c59786a2853b9 (diff)
downloadcacert-devel-9516e1d117d1dcf88db7ead53f950c66850c6fcb.tar.gz
cacert-devel-9516e1d117d1dcf88db7ead53f950c66850c6fcb.tar.xz
cacert-devel-9516e1d117d1dcf88db7ead53f950c66850c6fcb.zip
Source code taken from cacert-20110616.tar.bz2
Diffstat (limited to 'scripts/mail-weak-keys.php')
-rw-r--r--scripts/mail-weak-keys.php161
1 files changed, 161 insertions, 0 deletions
diff --git a/scripts/mail-weak-keys.php b/scripts/mail-weak-keys.php
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@@ -0,0 +1,161 @@
+#!/usr/bin/php -q
+<? # Companion script to DumpWeakCerts.pl, takes output and sends a mail to each owner of a weak cert
+
+ function SendServerCertMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date) {
+ $mail_text =
+"Dear $owner_name,
+
+CAcert recently became aware that some of the certificates signed by CAcert pose a security
+risk because they are backed by private keys that are vulnerable to attack.
+
+The security issues identified are:
+Private keys with a small key size. These keys are vulnerable to brute force attack.
+Private keys with an unsafe exponent. These keys are vulnerable to some specialised attacks.
+Private keys generated by a compromised version of OpenSSL distributed by Debian.
+
+You received this email because a certificate issued to you is vulnerable:
+
+Server Certificate, Serial $cert_serial, expiring $cert_expire, CN $cert_CN
+
+To rectify the problem CAcert will revoke all vulnerable certificates (including yours) on $action_date.
+CAcert will no longer accept vulnerable certificate requests for signing. In future all Certficate
+Signing Requests must be backed by private keys with a key length at least 2048 bits and no other known vulnerabilities.
+
+You should submit a new Certificate Signing Request of acceptable strength as soon as possible
+and replace your existing certificate.
+
+If you are interested in background information on this change please refer to this document:
+http://csrc.nist.gov/publications/nistpubs/800-78-3/sp800-78-3.pdf
+
+Kind regards
+CAcert Suport Team
+";
+ mail($cert_email, "[CAcert.org]CAcert Server Certificate - Urgent Action Required", $mail_text, "From: CAcert Support <support@cacert.org>\nReply-To: returns@cacert.org");
+ }
+
+ function SendClientMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date) {
+ $mail_text =
+"Dear $owner_name,
+
+CAcert recently became aware that some of the certificates signed by CAcert pose a security
+risk because they are backed by private keys that are vulnerable to attack.
+
+The security issues identified are:
+Private keys with a small key size. These keys are vulnerable to brute force attack.
+Private keys with an unsafe exponent. These keys are vulnerable to some specialised attacks.
+Private keys generated by a compromised version of OpenSSL distributed by Debian.
+
+You received this email because a certificate issued to you is vulnerable:
+
+Client Certificate, Serial $cert_serial, expiring $cert_expire, CN $cert_CN
+
+To rectify the problem CAcert will revoke all vulnerable certificates (including yours) on $action_date.
+CAcert will no longer accept vulnerable certificate requests for signing. In future all
+client certficates must be backed by private keys with a key length at least 1024 bits
+and no other known vulnerabilities.
+
+This means that you should replace your current certificate with a new one of acceptable strength.
+If you use Firefox or Chrome, select 'Keysize: High Grade' before 'Create Certificate Request'.
+If you use Internet Explorer, select 'Microsoft Strong Cryptographic Provider'. If you select an
+option that generates a weak key (eg 'Microsoft Base Cryptographic Provider v1.0') your certficate
+request will be rejected.
+
+Kind regards
+CAcert Suport Team
+";
+ mail($cert_email, "[CAcert.org]CAcert Client Certificate - Urgent Action Required", $mail_text, "From: CAcert Support <support@cacert.org>\nReply-To: returns@cacert.org");
+ }
+
+ function SendOrgServerCertMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date) {
+ $mail_text =
+"Dear $owner_name,
+
+CAcert recently became aware that some of the certificates signed by CAcert pose a security
+risk because they are backed by private keys that are vulnerable to attack.
+
+The security issues identified are:
+Private keys with a small key size. These keys are vulnerable to brute force attack.
+Private keys with an unsafe exponent. These keys are vulnerable to some specialised attacks.
+Private keys generated by a compromised version of OpenSSL distributed by Debian.
+
+You received this email because a certificate issued to you is vulnerable:
+
+Organisation Server Certificate, Serial $cert_serial, expiring $cert_expire, CN $cert_CN
+
+To rectify the problem CAcert will revoke all vulnerable certificates (including yours) on $action_date.
+CAcert will no longer accept vulnerable certificate requests for signing. In future all Certficate
+Signing Requests must be backed by private keys with a key length at least 2048 bits and no other known vulnerabilities.
+
+You should submit a new Certificate Signing Request of acceptable strength as soon as possible
+and replace your existing certificate.
+
+If you are interested in background information on this change please refer to this document:
+http://csrc.nist.gov/publications/nistpubs/800-78-3/sp800-78-3.pdf
+
+Kind regards
+CAcert Suport Team
+";
+ mail($cert_email, "[CAcert.org]CAcert Organisation Server Certificate - Urgent Action Required", $mail_text, "From: CAcert Support <support@cacert.org>\nReply-To: returns@cacert.org");
+ }
+
+ function SendOrgClientMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date) {
+ $mail_text =
+"Dear $owner_name,
+
+CAcert recently became aware that some of the certificates signed by CAcert pose a security
+risk because they are backed by private keys that are vulnerable to attack.
+
+The security issues identified are:
+Private keys with a small key size. These keys are vulnerable to brute force attack.
+Private keys with an unsafe exponent. These keys are vulnerable to some specialised attacks.
+Private keys generated by a compromised version of OpenSSL distributed by Debian.
+
+You received this email because a certificate issued to you is vulnerable:
+
+Organisation Client Certificate, Serial $cert_serial, expiring $cert_expire, CN $cert_CN
+
+To rectify the problem CAcert will revoke all vulnerable certificates (including yours) on $action_date.
+CAcert will no longer accept vulnerable certificate requests for signing. In future all
+client certficates must be backed by private keys with a key length at least 1024 bits
+and no other known vulnerabilities.
+
+This means that you should replace your current certificate with a new one of acceptable strength.
+If you use Firefox or Chrome, select 'Keysize: High Grade' before 'Create Certificate Request'.
+If you use Internet Explorer, select 'Microsoft Strong Cryptographic Provider'. If you select an
+option that generates a weak key (eg 'Microsoft Base Cryptographic Provider v1.0') your certficate
+request will be rejected.
+
+Kind regards
+CAcert Suport Team
+";
+ mail($cert_email, "[CAcert.org]CAcert Organisation Client Certificate - Urgent Action Required", $mail_text, "From: CAcert Support <support@cacert.org>\nReply-To: returns@cacert.org");
+ }
+
+ # Main
+
+ $num_domain = 0;
+ $num_client = 0;
+ $num_orgdomain = 0;
+ $num_orgclient = 0;
+ $action_date = '2011-04-??';
+ $in = fopen("php://stdin", "r");
+ while($in_string = rtrim(fgets($in, 255))) {
+ list($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial) = explode("\t", $in_string);
+
+ if ($cert_type == "DomainCert") {
+ SendServerCertMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date);
+ $num_domain++;
+ } else if ($cert_type == "EmailCert") {
+ SendClientMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date);
+ $num_client++;
+ } else if ($cert_type == "OrgServerCert") {
+ SendOrgServerCertMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date);
+ $num_orgdomain++;
+ } else if ($cert_type == "OrgEmailCert") {
+ SendOrgClientMail($cert_type, $cert_email, $owner_name, $cert_expire, $cert_CN, $reason, $cert_serial, $action_date);
+ $num_orgclient++;
+ }
+ }
+ fclose($in);
+ echo "Mails sent: $num_domain server certs, $num_client client certs, $num_orgdomain Org server certs, $num_orgclient Org client certs.\n";
+?>